Import of adapted loboris/ESP32_ePaper_example repository

components/mkspiffs/.travis.yml

@@ -0,0 +1,24 @@
+language: cpp
+addons:
+  apt:
+    sources:
+      - ubuntu-toolchain-r-test
+    packages:
+      - g++-4.8
+script:
+  - export CXX="g++-4.8" CC="gcc-4.8"
+  - make dist
+notifications:
+  email:
+    recipients:
+    - ivan@esp8266.com
+    on_success: change
+    on_failure: always
+deploy:
+  provider: releases
+  api_key:
+    secure: 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
+  file: mkspiffs-$TRAVIS_TAG-linux64.tar.gz
+  on:
+    repo: igrr/mkspiffs
+    tags: true

components/mkspiffs/Makefile.projbuild

@@ -0,0 +1,14 @@
+MKSPIFFS_COMPONENT_PATH := $(COMPONENT_PATH)
+MKSPIFFS_BUILD_DIR=$(abspath $(MKSPIFFS_COMPONENT_PATH)/mkspiffs)
+
+# Custom recursive make for mkspiffs sub-project
+MKSPIFFS_MAKE=+$(MAKE) -C $(MKSPIFFS_COMPONENT_PATH)/src
+
+.PHONY: mkspiffs clean
+
+mkspiffs: $(SDKCONFIG_MAKEFILE)
+	$(MKSPIFFS_MAKE) all
+
+clean: $(SDKCONFIG_MAKEFILE)
+	$(MKSPIFFS_MAKE) clean
+

components/mkspiffs/component.mk

@@ -0,0 +1,6 @@
+#
+# Component Makefile
+#
+
+COMPONENT_SRCDIRS := 
+COMPONENT_ADD_INCLUDEDIRS := 

components/mkspiffs/src/Makefile.original

@@ -0,0 +1,93 @@
+CFLAGS		?= -std=gnu99 -Os -Wall
+CXXFLAGS	?= -std=gnu++11 -Os -Wall
+
+ifeq ($(OS),Windows_NT)
+	TARGET_OS := WINDOWS
+	DIST_SUFFIX := windows
+	ARCHIVE_CMD := 7z a
+	ARCHIVE_EXTENSION := zip
+	TARGET := mkspiffs.exe
+	TARGET_CFLAGS := -mno-ms-bitfields
+	TARGET_LDFLAGS := -Wl,-static -static-libgcc
+
+else
+	UNAME_S := $(shell uname -s)
+	ifeq ($(UNAME_S),Linux)
+		TARGET_OS := LINUX
+		UNAME_P := $(shell uname -p)
+		ifeq ($(UNAME_P),x86_64)
+			DIST_SUFFIX := linux64
+		endif
+		ifneq ($(filter %86,$(UNAME_P)),)
+			DIST_SUFFIX := linux32
+		endif
+	endif
+	ifeq ($(UNAME_S),Darwin)
+		TARGET_OS := OSX
+		DIST_SUFFIX := osx
+		CC=clang
+		CXX=clang++
+		TARGET_CFLAGS   = -mmacosx-version-min=10.7 -arch i386 -arch x86_64
+		TARGET_CXXFLAGS = -mmacosx-version-min=10.7 -arch i386 -arch x86_64 -stdlib=libc++
+		TARGET_LDFLAGS  = -arch i386 -arch x86_64 -stdlib=libc++
+	endif
+	ARCHIVE_CMD := tar czf
+	ARCHIVE_EXTENSION := tar.gz
+	TARGET := mkspiffs
+endif
+
+VERSION ?= $(shell git describe --always)
+
+OBJ		:= main.o \
+		   spiffs/spiffs_cache.o \
+		   spiffs/spiffs_check.o \
+		   spiffs/spiffs_gc.o \
+		   spiffs/spiffs_hydrogen.o \
+		   spiffs/spiffs_nucleus.o \
+
+INCLUDES := -Itclap -Ispiffs -I.
+
+CFLAGS   += $(TARGET_CFLAGS)
+CXXFLAGS += $(TARGET_CXXFLAGS)
+LDFLAGS  += $(TARGET_LDFLAGS)
+
+CPPFLAGS += $(INCLUDES) -D$(TARGET_OS) -DVERSION=\"$(VERSION)\" -D__NO_INLINE__
+
+DIST_NAME := mkspiffs-$(VERSION)-$(DIST_SUFFIX)
+DIST_DIR := $(DIST_NAME)
+DIST_ARCHIVE := $(DIST_NAME).$(ARCHIVE_EXTENSION)
+
+.PHONY: all clean dist
+
+all: $(TARGET)
+
+dist: test $(DIST_ARCHIVE)
+
+$(DIST_ARCHIVE): $(TARGET) $(DIST_DIR)
+	cp $(TARGET) $(DIST_DIR)/
+	$(ARCHIVE_CMD) $(DIST_ARCHIVE) $(DIST_DIR)
+
+$(TARGET): $(OBJ)
+	$(CXX) $^ -o $@ $(LDFLAGS)
+	strip $(TARGET)
+
+$(DIST_DIR):
+	@mkdir -p $@
+
+clean:
+	@rm -f *.o
+	@rm -f spiffs/*.o
+	@rm -f $(TARGET)
+
+SPIFFS_TEST_FS_CONFIG := -s 0x100000 -p 512 -b 0x2000
+
+test: $(TARGET)
+	ls -1 spiffs > out.list0
+	./mkspiffs -c spiffs $(SPIFFS_TEST_FS_CONFIG) out.spiffs | sort | sed s/^\\/// > out.list1
+	./mkspiffs -u spiffs_u $(SPIFFS_TEST_FS_CONFIG) out.spiffs | sort | sed s/^\\/// > out.list_u
+	./mkspiffs -l $(SPIFFS_TEST_FS_CONFIG) out.spiffs | cut -f 2 | sort | sed s/^\\/// > out.list2
+	diff --strip-trailing-cr out.list0 out.list1
+	diff --strip-trailing-cr out.list0 out.list2
+	diff spiffs spiffs_u
+	rm -f out.{list0,list1,list2,list_u,spiffs}
+	rm -R spiffs_u

components/mkspiffs/src/README.md

@@ -0,0 +1,80 @@
+# mkspiffs
+Tool to build and unpack [SPIFFS](https://github.com/pellepl/spiffs) images.
+
+
+## Usage
+
+```
+
+   mkspiffs  {-c <pack_dir>|-u <dest_dir>|-l|-i} [-d <0-5>] [-b <number>]
+             [-p <number>] [-s <number>] [--] [--version] [-h]
+             <image_file>
+
+
+Where: 
+
+   -c <pack_dir>,  --create <pack_dir>
+     (OR required)  create spiffs image from a directory
+         -- OR --
+   -u <dest_dir>,  --unpack <dest_dir>
+     (OR required)  unpack spiffs image to a directory
+         -- OR --
+   -l,  --list
+     (OR required)  list files in spiffs image
+         -- OR --
+   -i,  --visualize
+     (OR required)  visualize spiffs image
+
+
+   -d <0-5>,  --debug <0-5>
+     Debug level. 0 means no debug output.
+
+   -b <number>,  --block <number>
+     fs block size, in bytes
+
+   -p <number>,  --page <number>
+     fs page size, in bytes
+
+   -s <number>,  --size <number>
+     fs image size, in bytes
+
+   --,  --ignore_rest
+     Ignores the rest of the labeled arguments following this flag.
+
+   --version
+     Displays version information and exits.
+
+   -h,  --help
+     Displays usage information and exits.
+
+   <image_file>
+     (required)  spiffs image file
+
+
+```
+## Build
+
+You need gcc (≥4.8) or clang(≥600.0.57), and make. On Windows, use MinGW.
+
+Run:
+```bash
+$ make dist
+```
+
+### Build status
+
+Linux | Windows
+------|-------
+ [![Linux build status](http://img.shields.io/travis/igrr/mkspiffs.svg)](https://travis-ci.org/igrr/mkspiffs) | [![Windows build status](http://img.shields.io/appveyor/ci/igrr/mkspiffs.svg)](https://ci.appveyor.com/project/igrr/mkspiffs)
+
+
+## License
+
+MIT
+
+## To do
+
+- [ ] Add more debug output and print SPIFFS debug output
+- [ ] Error handling
+- [ ] Determine the image size automatically when opening a file
+- [ ] Code cleanup

components/mkspiffs/src/appveyor.yml

@@ -0,0 +1,28 @@
+version: 0.0.{build}
+
+platform:
+    - x86
+
+skip_commits:
+  message: /\[ci skip\]/
+
+matrix:
+    fast_finish: true
+
+build_script:
+    - SET PATH=C:\MinGW\bin;C:\MinGW\msys\1.0\bin;%PATH%
+    - make dist
+
+artifacts:
+  - path: '*.zip'
+
+deploy:
+    release: $(PRODUCT_VERSION)
+    provider: GitHub
+    auth_token:
+        secure: 'PGg5fnoBpP1Omzr6f3KIYDiD8J30rretQjSl/MITRpzvSCmN88kM6VDMz1TBGZTA'
+    artifact: /.*\.zip/
+    draft: true
+    prerelease: false
+    on:
+        appveyor_repo_tag: true

components/mkspiffs/src/main.cpp

@@ -0,0 +1,646 @@
+//
+//  main.cpp
+//  make_spiffs
+//
+//  Created by Ivan Grokhotkov on 13/05/15.
+//  Copyright (c) 2015 Ivan Grokhotkov. All rights reserved.
+//
+#define TCLAP_SETBASE_ZERO 1
+#define VERSION "0.3.6"
+
+#include <iostream>
+#include "spiffs/spiffs.h"
+#include <vector>
+#include <dirent.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <cstring>
+#include <string>
+#include <time.h>
+#include <memory>
+#include <cstdlib>
+#include "tclap/CmdLine.h"
+#include "tclap/UnlabeledValueArg.h"
+
+static std::vector<uint8_t> s_flashmem;
+
+static std::string s_dirName;
+static std::string s_imageName;
+static int s_imageSize;
+static int s_pageSize;
+static int s_blockSize;
+
+typedef struct {
+	time_t mtime;
+	time_t ctime;
+	time_t atime;
+	uint8_t spare[SPIFFS_OBJ_META_LEN - (sizeof(time_t)*3)];
+} spiffs_metadata_t;
+
+enum Action { ACTION_NONE, ACTION_PACK, ACTION_UNPACK, ACTION_LIST, ACTION_VISUALIZE };
+static Action s_action = ACTION_NONE;
+
+static spiffs s_fs;
+
+static std::vector<uint8_t> s_spiffsWorkBuf;
+static std::vector<uint8_t> s_spiffsFds;
+static std::vector<uint8_t> s_spiffsCache;
+
+
+static s32_t api_spiffs_read(u32_t addr, u32_t size, u8_t *dst){
+    memcpy(dst, &s_flashmem[0] + addr, size);
+    return SPIFFS_OK;
+}
+
+static s32_t api_spiffs_write(u32_t addr, u32_t size, u8_t *src){
+    memcpy(&s_flashmem[0] + addr, src, size);
+    return SPIFFS_OK;
+}
+
+static s32_t api_spiffs_erase(u32_t addr, u32_t size){
+    memset(&s_flashmem[0] + addr, 0xff, size);
+    return SPIFFS_OK;
+}
+
+
+int g_debugLevel = 0;
+
+
+//implementation
+
+int spiffsTryMount(){
+    spiffs_config cfg = {0};
+
+    cfg.phys_addr = 0x0000;
+    cfg.phys_size = (u32_t) s_flashmem.size();
+
+    cfg.phys_erase_block = s_blockSize;
+    cfg.log_block_size = s_blockSize;
+    cfg.log_page_size = s_pageSize;
+
+    cfg.hal_read_f = api_spiffs_read;
+    cfg.hal_write_f = api_spiffs_write;
+    cfg.hal_erase_f = api_spiffs_erase;
+
+    const int maxOpenFiles = 4;
+    s_spiffsWorkBuf.resize(s_pageSize * 2);
+    s_spiffsFds.resize(32 * maxOpenFiles);
+    s_spiffsCache.resize((32 + s_pageSize) * maxOpenFiles);
+
+    return SPIFFS_mount(&s_fs, &cfg,
+        &s_spiffsWorkBuf[0],
+        &s_spiffsFds[0], s_spiffsFds.size(),
+        &s_spiffsCache[0], s_spiffsCache.size(),
+        NULL);
+}
+
+bool spiffsMount(){
+  if(SPIFFS_mounted(&s_fs))
+    return true;
+  int res = spiffsTryMount();
+  return (res == SPIFFS_OK);
+}
+
+bool spiffsFormat(){
+  spiffsMount();
+  SPIFFS_unmount(&s_fs);
+  int formated = SPIFFS_format(&s_fs);
+  if(formated != SPIFFS_OK)
+    return false;
+  return (spiffsTryMount() == SPIFFS_OK);
+}
+
+void spiffsUnmount(){
+  if(SPIFFS_mounted(&s_fs))
+    SPIFFS_unmount(&s_fs);
+}
+
+// WHITECAT BEGIN
+int addDir(const char* name) {
+	spiffs_metadata_t meta;
+
+	std::string fileName = name;
+    fileName += "/.";
+
+	std::cout << fileName << std::endl;
+	
+    spiffs_file dst = SPIFFS_open(&s_fs, fileName.c_str(), SPIFFS_CREAT, 0);
+    if (dst < 0) {
+        std::cerr << "SPIFFS_write error(" << s_fs.err_code << "): ";
+
+        if (s_fs.err_code == SPIFFS_ERR_FULL) {
+            std::cerr << "File system is full." << std::endl;
+        } else {
+            std::cerr << "unknown";
+        }
+        std::cerr << std::endl;
+
+        SPIFFS_close(&s_fs, dst);
+        return 1;
+    }
+
+    SPIFFS_close(&s_fs, dst);
+    if (strlen(name) > 0) {
+		// Get the system time to file timestamps
+		meta.atime = time(NULL);
+		meta.ctime = meta.atime;
+		meta.mtime = meta.atime;
+		SPIFFS_update_meta(&s_fs, fileName.c_str(), &meta);
+	}
+
+    return 0;
+}
+// WHITECAT END
+
+int addFile(char* name, const char* path) {
+	spiffs_metadata_t meta;
+
+	FILE* src = fopen(path, "rb");
+    if (!src) {
+        std::cerr << "error: failed to open " << path << " for reading" << std::endl;
+        return 1;
+    }
+
+    spiffs_file dst = SPIFFS_open(&s_fs, name, SPIFFS_CREAT | SPIFFS_TRUNC | SPIFFS_RDWR, 0);
+
+    // read file size
+    fseek(src, 0, SEEK_END);
+    size_t size = ftell(src);
+    fseek(src, 0, SEEK_SET);
+
+    if (g_debugLevel > 0) {
+        std::cout << "file size: " << size << std::endl;
+    }
+
+    size_t left = size;
+    uint8_t data_byte;
+    while (left > 0){
+        if (1 != fread(&data_byte, 1, 1, src)) {
+            std::cerr << "fread error!" << std::endl;
+
+            fclose(src);
+            SPIFFS_close(&s_fs, dst);
+            return 1;
+        }
+        int res = SPIFFS_write(&s_fs, dst, &data_byte, 1);
+        if (res < 0) {
+            std::cerr << "SPIFFS_write error(" << s_fs.err_code << "): ";
+
+            if (s_fs.err_code == SPIFFS_ERR_FULL) {
+                std::cerr << "File system is full." << std::endl;
+            } else {
+                std::cerr << "unknown";
+            }
+            std::cerr << std::endl;
+
+            if (g_debugLevel > 0) {
+                std::cout << "data left: " << left << std::endl;
+            }
+
+            fclose(src);
+            SPIFFS_close(&s_fs, dst);
+            return 1;
+        }
+        left -= 1;
+    }
+
+	SPIFFS_close(&s_fs, dst);
+
+	// Get the system time to file timestamps
+	meta.atime = time(NULL);
+	meta.ctime = meta.atime;
+	meta.mtime = meta.atime;
+	SPIFFS_update_meta(&s_fs, name, &meta);
+
+    fclose(src);
+
+    return 0;
+}
+
+int addFiles(const char* dirname, const char* subPath) {
+    DIR *dir;
+    struct dirent *ent;
+    bool error = false;
+    std::string dirPath = dirname;
+    dirPath += subPath;
+
+    // Open directory
+    if ((dir = opendir (dirPath.c_str())) != NULL) {
+
+        // Read files from directory.
+        while ((ent = readdir (dir)) != NULL) {
+            // Ignore dir itself.
+            if (ent->d_name[0] == '.')				
+                continue;            	
+
+            std::string fullpath = dirPath;
+            fullpath += ent->d_name;
+            struct stat path_stat;
+            stat (fullpath.c_str(), &path_stat);
+
+            if (!S_ISREG(path_stat.st_mode)) {
+                // Check if path is a directory.
+                if (S_ISDIR(path_stat.st_mode)) {
+                    // Prepare new sub path.
+                    std::string newSubPath = subPath;
+                    newSubPath += ent->d_name;
+					
+					// WHITECAT BEGIN
+					addDir(newSubPath.c_str());
+					// WHITECAT END
+					
+                    newSubPath += "/";
+
+                    if (addFiles(dirname, newSubPath.c_str()) != 0)
+                    {
+                        std::cerr << "Error for adding content from " << ent->d_name << "!" << std::endl;
+                    }
+
+                    continue;
+                }
+                else
+                {
+                    std::cerr << "skipping " << ent->d_name << std::endl;
+                    continue;
+                }
+            }
+
+            // Filepath with dirname as root folder.
+            std::string filepath = subPath;
+            filepath += ent->d_name;
+            std::cout << filepath << std::endl;
+
+            // Add File to image.
+            if (addFile((char*)filepath.c_str(), fullpath.c_str()) != 0) {
+                std::cerr << "error adding file!" << std::endl;
+                error = true;
+                if (g_debugLevel > 0) {
+                    std::cout << std::endl;
+                }
+                break;
+            }
+        } // end while
+        closedir (dir);
+    } else {
+        std::cerr << "warning: can't read source directory" << std::endl;
+        return 1;
+    }
+
+    return (error) ? 1 : 0;
+}
+
+void listFiles() {
+    spiffs_DIR dir;
+    spiffs_dirent ent;
+
+    SPIFFS_opendir(&s_fs, 0, &dir);
+    spiffs_dirent* it;
+    while (true) {
+        it = SPIFFS_readdir(&dir, &ent);
+        if (!it)
+            break;
+
+        std::cout << it->size << '\t' << it->name << std::endl;
+    }
+    SPIFFS_closedir(&dir);
+}
+
+/**
+ * @brief Check if directory exists.
+ * @param path Directory path.
+ * @return True if exists otherwise false.
+ *
+ * @author Pascal Gollor (http://www.pgollor.de/cms/)
+ */
+bool dirExists(const char* path) {
+    DIR *d = opendir(path);
+
+    if (d) {
+        closedir(d);
+        return true;
+    }
+
+    return false;
+}
+
+/**
+ * @brief Create directory if it not exists.
+ * @param path Directory path.
+ * @return True or false.
+ *
+ * @author Pascal Gollor (http://www.pgollor.de/cms/)
+ */
+bool dirCreate(const char* path) {
+    // Check if directory also exists.
+    if (dirExists(path)) {
+	    return false;
+    }
+
+    // platform stuff...
+#if defined(_WIN32)
+    if (_mkdir(path) != 0) {
+#else
+    if (mkdir(path, S_IRWXU | S_IXGRP | S_IRGRP | S_IROTH | S_IXOTH) != 0) {
+#endif
+	    std::cerr << "Can not create directory!!!" << std::endl;
+		return false;
+    }
+
+    return true;
+}
+
+/**
+ * @brief Unpack file from file system.
+ * @param spiffsFile SPIFFS dir entry pointer.
+ * @param destPath Destination file path path.
+ * @return True or false.
+ *
+ * @author Pascal Gollor (http://www.pgollor.de/cms/)
+ */
+bool unpackFile(spiffs_dirent *spiffsFile, const char *destPath) {
+    u8_t buffer[spiffsFile->size];
+    std::string filename = (const char*)(spiffsFile->name);
+
+    // Open file from spiffs file system.
+    spiffs_file src = SPIFFS_open(&s_fs, (char *)(filename.c_str()), SPIFFS_RDONLY, 0);
+
+    // read content into buffer
+    SPIFFS_read(&s_fs, src, buffer, spiffsFile->size);
+
+    // Close spiffs file.
+    SPIFFS_close(&s_fs, src);
+
+    // Open file.
+    FILE* dst = fopen(destPath, "wb");
+
+    // Write content into file.
+    fwrite(buffer, sizeof(u8_t), sizeof(buffer), dst);
+
+    // Close file.
+    fclose(dst);
+
+
+    return true;
+}
+
+/**
+ * @brief Unpack files from file system.
+ * @param sDest Directory path as std::string.
+ * @return True or false.
+ *
+ * @author Pascal Gollor (http://www.pgollor.de/cms/)
+ *
+ * todo: Do unpack stuff for directories.
+ */
+bool unpackFiles(std::string sDest) {
+    spiffs_DIR dir;
+    spiffs_dirent ent;
+
+    // Add "./" to path if is not given.
+    if (sDest.find("./") == std::string::npos && sDest.find("/") == std::string::npos) {
+        sDest = "./" + sDest;
+    }
+
+    // Check if directory exists. If it does not then try to create it with permissions 755.
+    if (! dirExists(sDest.c_str())) {
+        std::cout << "Directory " << sDest << " does not exists. Try to create it." << std::endl;
+
+        // Try to create directory.
+        if (! dirCreate(sDest.c_str())) {
+            return false;
+        }
+    }
+
+    // Open directory.
+    SPIFFS_opendir(&s_fs, 0, &dir);
+
+    // Read content from directory.
+    spiffs_dirent* it = SPIFFS_readdir(&dir, &ent);
+    while (it) {
+        // Check if content is a file.
+        if ((int)(it->type) == 1) {
+            std::string name = (const char*)(it->name);
+            std::string sDestFilePath = sDest + name;
+            size_t pos = name.find_last_of("/");
+
+            // If file is in sub directory?
+            if (pos > 0) {
+                // Subdir path.
+                std::string path = sDest;
+                path += name.substr(0, pos);
+
+                // Create subddir if subdir not exists.
+                if (!dirExists(path.c_str())) {
+                    if (!dirCreate(path.c_str())) {
+                        return false;
+                    }
+                }
+            }
+
+            // Unpack file to destination directory.
+            if (! unpackFile(it, sDestFilePath.c_str()) ) {
+                std::cout << "Can not unpack " << it->name << "!" << std::endl;
+                return false;
+            }
+
+            // Output stuff.
+            std::cout
+                << it->name
+                << '\t'
+                << " > " << sDestFilePath
+                << '\t'
+                << "size: " << it->size << " Bytes"
+                << std::endl;
+        }
+
+        // Get next file handle.
+        it = SPIFFS_readdir(&dir, &ent);
+    } // end while
+
+    // Close directory.
+    SPIFFS_closedir(&dir);
+
+    return true;
+}
+
+// Actions
+
+int actionPack() {
+    s_flashmem.resize(s_imageSize, 0xff);
+
+    FILE* fdres = fopen(s_imageName.c_str(), "wb");
+    if (!fdres) {
+        std::cerr << "error: failed to open image file" << std::endl;
+        return 1;
+    }
+
+    spiffsFormat();
+
+	// WHITECAT BEGIN
+	addDir("");
+	// WHITECAT END
+	
+    int result = addFiles(s_dirName.c_str(), "/");
+    spiffsUnmount();
+
+    fwrite(&s_flashmem[0], 4, s_flashmem.size()/4, fdres);
+    fclose(fdres);
+
+    return result;
+}
+
+/**
+ * @brief Unpack action.
+ * @return 0 success, 1 error
+ *
+ * @author Pascal Gollor (http://www.pgollor.de/cms/)
+ */
+int actionUnpack(void) {
+    int ret = 0;
+    s_flashmem.resize(s_imageSize, 0xff);
+
+    // open spiffs image
+    FILE* fdsrc = fopen(s_imageName.c_str(), "rb");
+    if (!fdsrc) {
+        std::cerr << "error: failed to open image file" << std::endl;
+        return 1;
+    }
+
+    // read content into s_flashmem
+    ret = fread(&s_flashmem[0], 4, s_flashmem.size()/4, fdsrc);
+
+    // close fiel handle
+    fclose(fdsrc);
+
+    // mount file system
+    spiffsMount();
+
+    // unpack files
+    if (! unpackFiles(s_dirName)) {
+        ret = 1;
+    }
+
+    // unmount file system
+    spiffsUnmount();
+
+    return ret;
+}
+
+
+int actionList() {
+    int ret = 0;
+    s_flashmem.resize(s_imageSize, 0xff);
+
+    FILE* fdsrc = fopen(s_imageName.c_str(), "rb");
+    if (!fdsrc) {
+        std::cerr << "error: failed to open image file" << std::endl;
+        return 1;
+    }
+
+    ret = fread(&s_flashmem[0], 4, s_flashmem.size()/4, fdsrc);
+    fclose(fdsrc);
+    spiffsMount();
+    listFiles();
+    spiffsUnmount();
+    
+    ret = 0;
+    return ret;
+}
+
+int actionVisualize() {
+    int ret = 0;
+    s_flashmem.resize(s_imageSize, 0xff);
+
+    FILE* fdsrc = fopen(s_imageName.c_str(), "rb");
+    if (!fdsrc) {
+        std::cerr << "error: failed to open image file" << std::endl;
+        return 1;
+    }
+
+    ret = fread(&s_flashmem[0], 4, s_flashmem.size()/4, fdsrc);
+    fclose(fdsrc);
+
+    spiffsMount();
+    //SPIFFS_vis(&s_fs);
+    uint32_t total, used;
+    SPIFFS_info(&s_fs, &total, &used);
+    std::cout << "total: " << total <<  std::endl << "used: " << used << std::endl;
+    spiffsUnmount();
+
+    ret = 0;
+    return ret;
+}
+
+void processArgs(int argc, const char** argv) {
+    TCLAP::CmdLine cmd("", ' ', VERSION);
+    TCLAP::ValueArg<std::string> packArg( "c", "create", "create spiffs image from a directory", true, "", "pack_dir");
+    TCLAP::ValueArg<std::string> unpackArg( "u", "unpack", "unpack spiffs image to a directory", true, "", "dest_dir");
+    TCLAP::SwitchArg listArg( "l", "list", "list files in spiffs image", false);
+    TCLAP::SwitchArg visualizeArg( "i", "visualize", "visualize spiffs image", false);
+    TCLAP::UnlabeledValueArg<std::string> outNameArg( "image_file", "spiffs image file", true, "", "image_file"  );
+    TCLAP::ValueArg<int> imageSizeArg( "s", "size", "fs image size, in bytes", false, 0x10000, "number" );
+    TCLAP::ValueArg<int> pageSizeArg( "p", "page", "fs page size, in bytes", false, 256, "number" );
+    TCLAP::ValueArg<int> blockSizeArg( "b", "block", "fs block size, in bytes", false, 4096, "number" );
+    TCLAP::ValueArg<int> debugArg( "d", "debug", "Debug level. 0 means no debug output.", false, 0, "0-5" );
+
+    cmd.add( imageSizeArg );
+    cmd.add( pageSizeArg );
+    cmd.add( blockSizeArg );
+    cmd.add(debugArg);
+    std::vector<TCLAP::Arg*> args = {&packArg, &unpackArg, &listArg, &visualizeArg};
+    cmd.xorAdd( args );
+    cmd.add( outNameArg );
+    cmd.parse( argc, argv );
+
+    if (debugArg.getValue() > 0) {
+        std::cout << "Debug output enabled" << std::endl;
+        g_debugLevel = debugArg.getValue();
+    }
+
+    if (packArg.isSet()) {
+        s_dirName = packArg.getValue();
+        s_action = ACTION_PACK;
+    } else if (unpackArg.isSet()) {
+        s_dirName = unpackArg.getValue();
+        s_action = ACTION_UNPACK;
+    } else if (listArg.isSet()) {
+        s_action = ACTION_LIST;
+    } else if (visualizeArg.isSet()) {
+        s_action = ACTION_VISUALIZE;
+    }
+
+    s_imageName = outNameArg.getValue();
+    s_imageSize = imageSizeArg.getValue();
+    s_pageSize  = pageSizeArg.getValue();
+    s_blockSize = blockSizeArg.getValue();
+}
+
+int main(int argc, const char * argv[]) {
+
+    try {
+        processArgs(argc, argv);
+    } catch(...) {
+        std::cerr << "Invalid arguments" << std::endl;
+        return 1;
+    }
+
+    switch (s_action) {
+    case ACTION_PACK:
+        return actionPack();
+        break;
+    case ACTION_UNPACK:
+    	return actionUnpack();
+        break;
+    case ACTION_LIST:
+        return actionList();
+        break;
+    case ACTION_VISUALIZE:
+        return actionVisualize();
+        break;
+    default:
+        break;
+    }
+
+    return 1;
+}

components/mkspiffs/src/spiffs/esp_spiffs.c

@@ -0,0 +1,138 @@
+/*
+ * Lua RTOS, SPIFFS low access
+ *
+ * Copyright (C) 2015 - 2017
+ * IBEROXARXA SERVICIOS INTEGRALES, S.L. & CSS IBÉRICA, S.L.
+ * 
+ * Author: Jaume Olivé (jolive@iberoxarxa.com / jolive@whitecatboard.org)
+ * 
+ * All rights reserved.  
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * and its documentation for any purpose and without fee is hereby
+ * granted, provided that the above copyright notice appear in all
+ * copies and that both that the copyright notice and this
+ * permission notice and warranty disclaimer appear in supporting
+ * documentation, and that the name of the author not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * The author disclaim all warranties with regard to this
+ * software, including all implied warranties of merchantability
+ * and fitness.  In no event shall the author be liable for any
+ * special, indirect or consequential damages or any damages
+ * whatsoever resulting from loss of use, data or profits, whether
+ * in an action of contract, negligence or other tortious action,
+ * arising out of or in connection with the use or performance of
+ * this software.
+ */
+
+#include <stdlib.h>
+
+#include "esp_spiffs.h"
+#include "esp_attr.h"
+
+#include "spiffs.h"
+
+#include <esp_spi_flash.h>
+
+s32_t esp32_spi_flash_read(u32_t addr, u32_t size, u8_t *dst) {
+	u32_t aaddr;
+	u8_t *buff = NULL;
+	u8_t *abuff = NULL;
+	u32_t asize;
+
+	asize = size;
+	
+	// Align address to 4 byte
+	aaddr = (addr + (4 - 1)) & (u32_t)-4;
+	if (aaddr != addr) {
+		aaddr -= 4;
+		asize += (addr - aaddr);
+	}
+
+	// Align size to 4 byte
+	asize = (asize + (4 - 1)) & (u32_t)-4;
+
+	if ((aaddr != addr) || (asize != size)) {
+		// Align buffer
+		buff = malloc(asize + 4);
+		if (!buff) {
+			return SPIFFS_ERR_INTERNAL;
+		}
+
+		abuff = (u8_t *)(((ptrdiff_t)buff + (4 - 1)) & (u32_t)-4);
+
+		if (spi_flash_read(aaddr, (void *)abuff, asize) != 0) {
+			free(buff);
+			return SPIFFS_ERR_INTERNAL;
+		}
+
+		memcpy(dst, abuff + (addr - aaddr), size);
+
+		free(buff);
+	} else {
+		if (spi_flash_read(addr, (void *)dst, size) != 0) {
+			return SPIFFS_ERR_INTERNAL;
+		}
+	}
+	
+    return SPIFFS_OK;
+}
+
+s32_t esp32_spi_flash_write(u32_t addr, u32_t size, const u8_t *src) {
+	u32_t aaddr;
+	u8_t *buff = NULL;
+	u8_t *abuff = NULL;
+	u32_t asize;
+
+	asize = size;
+	
+	// Align address to 4 byte
+	aaddr = (addr + (4 - 1)) & -4;
+	if (aaddr != addr) {
+		aaddr -= 4;
+		asize += (addr - aaddr);
+	}
+
+	// Align size to 4 byte
+	asize = (asize + (4 - 1)) & -4; 
+
+	if ((aaddr != addr) || (asize != size)) {
+		// Align buffer
+		buff = malloc(asize + 4);
+		if (!buff) {
+			return SPIFFS_ERR_INTERNAL;
+		}
+
+		abuff = (u8_t *)(((ptrdiff_t)buff + (4 - 1)) & -4);
+
+		if (spi_flash_read(aaddr, (void *)abuff, asize) != 0) {
+			free(buff);
+			return SPIFFS_ERR_INTERNAL;
+		}
+
+		memcpy(abuff + (addr - aaddr), src, size);
+
+		if (spi_flash_write(aaddr, (uint32_t *)abuff, asize) != 0) {
+			free(buff);
+			return SPIFFS_ERR_INTERNAL;
+		}
+
+		free(buff);
+	} else {
+		if (spi_flash_write(addr, (uint32_t *)src, size) != 0) {
+			return SPIFFS_ERR_INTERNAL;
+		}
+	}
+	
+    return SPIFFS_OK;
+}
+
+s32_t IRAM_ATTR esp32_spi_flash_erase(u32_t addr, u32_t size) {
+	if (spi_flash_erase_sector(addr >> 12) != 0) {
+		return SPIFFS_ERR_INTERNAL;
+	}
+	
+    return SPIFFS_OK;
+}

components/mkspiffs/src/spiffs/esp_spiffs.h

@@ -0,0 +1,43 @@
+/*
+ * Lua RTOS, write syscall implementation
+ *
+ * Copyright (C) 2015 - 2017
+ * IBEROXARXA SERVICIOS INTEGRALES, S.L. & CSS IBÉRICA, S.L.
+ * 
+ * Author: Jaume Olivé (jolive@iberoxarxa.com / jolive@whitecatboard.org)
+ * 
+ * All rights reserved.  
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * and its documentation for any purpose and without fee is hereby
+ * granted, provided that the above copyright notice appear in all
+ * copies and that both that the copyright notice and this
+ * permission notice and warranty disclaimer appear in supporting
+ * documentation, and that the name of the author not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ *
+ * The author disclaim all warranties with regard to this
+ * software, including all implied warranties of merchantability
+ * and fitness.  In no event shall the author be liable for any
+ * special, indirect or consequential damages or any damages
+ * whatsoever resulting from loss of use, data or profits, whether
+ * in an action of contract, negligence or other tortious action,
+ * arising out of or in connection with the use or performance of
+ * this software.
+ */
+
+#ifndef __ESP_SPIFFS_H__
+#define __ESP_SPIFFS_H__
+
+#include "spiffs.h"
+
+s32_t esp32_spi_flash_read(u32_t addr, u32_t size, u8_t *dst);
+s32_t esp32_spi_flash_write(u32_t addr, u32_t size, const u8_t *src);
+s32_t esp32_spi_flash_erase(u32_t addr, u32_t size);
+
+#define low_spiffs_read  (spiffs_read *)esp32_spi_flash_read
+#define low_spiffs_write (spiffs_write *)esp32_spi_flash_write
+#define low_spiffs_erase (spiffs_erase *)esp32_spi_flash_erase
+
+#endif  // __ESP_SPIFFS_H__

components/mkspiffs/src/spiffs/spiffs.h

@@ -0,0 +1,813 @@
+/*
+ * spiffs.h
+ *
+ *  Created on: May 26, 2013
+ *      Author: petera
+ */
+
+#ifndef SPIFFS_H_
+#define SPIFFS_H_
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#include "spiffs_config.h"
+
+#define SPIFFS_OK                       0
+#define SPIFFS_ERR_NOT_MOUNTED          -10000
+#define SPIFFS_ERR_FULL                 -10001
+#define SPIFFS_ERR_NOT_FOUND            -10002
+#define SPIFFS_ERR_END_OF_OBJECT        -10003
+#define SPIFFS_ERR_DELETED              -10004
+#define SPIFFS_ERR_NOT_FINALIZED        -10005
+#define SPIFFS_ERR_NOT_INDEX            -10006
+#define SPIFFS_ERR_OUT_OF_FILE_DESCS    -10007
+#define SPIFFS_ERR_FILE_CLOSED          -10008
+#define SPIFFS_ERR_FILE_DELETED         -10009
+#define SPIFFS_ERR_BAD_DESCRIPTOR       -10010
+#define SPIFFS_ERR_IS_INDEX             -10011
+#define SPIFFS_ERR_IS_FREE              -10012
+#define SPIFFS_ERR_INDEX_SPAN_MISMATCH  -10013
+#define SPIFFS_ERR_DATA_SPAN_MISMATCH   -10014
+#define SPIFFS_ERR_INDEX_REF_FREE       -10015
+#define SPIFFS_ERR_INDEX_REF_LU         -10016
+#define SPIFFS_ERR_INDEX_REF_INVALID    -10017
+#define SPIFFS_ERR_INDEX_FREE           -10018
+#define SPIFFS_ERR_INDEX_LU             -10019
+#define SPIFFS_ERR_INDEX_INVALID        -10020
+#define SPIFFS_ERR_NOT_WRITABLE         -10021
+#define SPIFFS_ERR_NOT_READABLE         -10022
+#define SPIFFS_ERR_CONFLICTING_NAME     -10023
+#define SPIFFS_ERR_NOT_CONFIGURED       -10024
+
+#define SPIFFS_ERR_NOT_A_FS             -10025
+#define SPIFFS_ERR_MOUNTED              -10026
+#define SPIFFS_ERR_ERASE_FAIL           -10027
+#define SPIFFS_ERR_MAGIC_NOT_POSSIBLE   -10028
+
+#define SPIFFS_ERR_NO_DELETED_BLOCKS    -10029
+
+#define SPIFFS_ERR_FILE_EXISTS          -10030
+
+#define SPIFFS_ERR_NOT_A_FILE           -10031
+#define SPIFFS_ERR_RO_NOT_IMPL          -10032
+#define SPIFFS_ERR_RO_ABORTED_OPERATION -10033
+#define SPIFFS_ERR_PROBE_TOO_FEW_BLOCKS -10034
+#define SPIFFS_ERR_PROBE_NOT_A_FS       -10035
+#define SPIFFS_ERR_NAME_TOO_LONG        -10036
+
+#define SPIFFS_ERR_IX_MAP_UNMAPPED      -10037
+#define SPIFFS_ERR_IX_MAP_MAPPED        -10038
+#define SPIFFS_ERR_IX_MAP_BAD_RANGE     -10039
+
+#define SPIFFS_ERR_INTERNAL             -10050
+
+#define SPIFFS_ERR_TEST                 -10100
+
+
+// spiffs file descriptor index type. must be signed
+typedef s16_t spiffs_file;
+// spiffs file descriptor flags
+typedef u16_t spiffs_flags;
+// spiffs file mode
+typedef u16_t spiffs_mode;
+// object type
+typedef u8_t spiffs_obj_type;
+
+struct spiffs_t;
+
+#if SPIFFS_HAL_CALLBACK_EXTRA
+
+/* spi read call function type */
+typedef s32_t (*spiffs_read)(struct spiffs_t *fs, u32_t addr, u32_t size, u8_t *dst);
+/* spi write call function type */
+typedef s32_t (*spiffs_write)(struct spiffs_t *fs, u32_t addr, u32_t size, u8_t *src);
+/* spi erase call function type */
+typedef s32_t (*spiffs_erase)(struct spiffs_t *fs, u32_t addr, u32_t size);
+
+#else // SPIFFS_HAL_CALLBACK_EXTRA
+
+/* spi read call function type */
+typedef s32_t (*spiffs_read)(u32_t addr, u32_t size, u8_t *dst);
+/* spi write call function type */
+typedef s32_t (*spiffs_write)(u32_t addr, u32_t size, u8_t *src);
+/* spi erase call function type */
+typedef s32_t (*spiffs_erase)(u32_t addr, u32_t size);
+#endif // SPIFFS_HAL_CALLBACK_EXTRA
+
+/* file system check callback report operation */
+typedef enum {
+  SPIFFS_CHECK_LOOKUP = 0,
+  SPIFFS_CHECK_INDEX,
+  SPIFFS_CHECK_PAGE
+} spiffs_check_type;
+
+/* file system check callback report type */
+typedef enum {
+  SPIFFS_CHECK_PROGRESS = 0,
+  SPIFFS_CHECK_ERROR,
+  SPIFFS_CHECK_FIX_INDEX,
+  SPIFFS_CHECK_FIX_LOOKUP,
+  SPIFFS_CHECK_DELETE_ORPHANED_INDEX,
+  SPIFFS_CHECK_DELETE_PAGE,
+  SPIFFS_CHECK_DELETE_BAD_FILE
+} spiffs_check_report;
+
+/* file system check callback function */
+#if SPIFFS_HAL_CALLBACK_EXTRA
+typedef void (*spiffs_check_callback)(struct spiffs_t *fs, spiffs_check_type type, spiffs_check_report report,
+    u32_t arg1, u32_t arg2);
+#else // SPIFFS_HAL_CALLBACK_EXTRA
+typedef void (*spiffs_check_callback)(spiffs_check_type type, spiffs_check_report report,
+    u32_t arg1, u32_t arg2);
+#endif // SPIFFS_HAL_CALLBACK_EXTRA
+
+/* file system listener callback operation */
+typedef enum {
+  /* the file has been created */
+  SPIFFS_CB_CREATED = 0,
+  /* the file has been updated or moved to another page */
+  SPIFFS_CB_UPDATED,
+  /* the file has been deleted */
+  SPIFFS_CB_DELETED
+} spiffs_fileop_type;
+
+/* file system listener callback function */
+typedef void (*spiffs_file_callback)(struct spiffs_t *fs, spiffs_fileop_type op, spiffs_obj_id obj_id, spiffs_page_ix pix);
+
+#ifndef SPIFFS_DBG
+#define SPIFFS_DBG(...) \
+    printf(__VA_ARGS__)
+#endif
+#ifndef SPIFFS_GC_DBG
+#define SPIFFS_GC_DBG(...) printf(__VA_ARGS__)
+#endif
+#ifndef SPIFFS_CACHE_DBG
+#define SPIFFS_CACHE_DBG(...) printf(__VA_ARGS__)
+#endif
+#ifndef SPIFFS_CHECK_DBG
+#define SPIFFS_CHECK_DBG(...) printf(__VA_ARGS__)
+#endif
+
+/* Any write to the filehandle is appended to end of the file */
+#define SPIFFS_APPEND                   (1<<0)
+#define SPIFFS_O_APPEND                 SPIFFS_APPEND
+/* If the opened file exists, it will be truncated to zero length before opened */
+#define SPIFFS_TRUNC                    (1<<1)
+#define SPIFFS_O_TRUNC                  SPIFFS_TRUNC
+/* If the opened file does not exist, it will be created before opened */
+#define SPIFFS_CREAT                    (1<<2)
+#define SPIFFS_O_CREAT                  SPIFFS_CREAT
+/* The opened file may only be read */
+#define SPIFFS_RDONLY                   (1<<3)
+#define SPIFFS_O_RDONLY                 SPIFFS_RDONLY
+/* The opened file may only be written */
+#define SPIFFS_WRONLY                   (1<<4)
+#define SPIFFS_O_WRONLY                 SPIFFS_WRONLY
+/* The opened file may be both read and written */
+#define SPIFFS_RDWR                     (SPIFFS_RDONLY | SPIFFS_WRONLY)
+#define SPIFFS_O_RDWR                   SPIFFS_RDWR
+/* Any writes to the filehandle will never be cached but flushed directly */
+#define SPIFFS_DIRECT                   (1<<5)
+#define SPIFFS_O_DIRECT                 SPIFFS_DIRECT
+/* If SPIFFS_O_CREAT and SPIFFS_O_EXCL are set, SPIFFS_open() shall fail if the file exists */
+#define SPIFFS_EXCL                     (1<<6)
+#define SPIFFS_O_EXCL                   SPIFFS_EXCL
+
+#define SPIFFS_SEEK_SET                 (0)
+#define SPIFFS_SEEK_CUR                 (1)
+#define SPIFFS_SEEK_END                 (2)
+
+#define SPIFFS_TYPE_FILE                (1)
+#define SPIFFS_TYPE_DIR                 (2)
+#define SPIFFS_TYPE_HARD_LINK           (3)
+#define SPIFFS_TYPE_SOFT_LINK           (4)
+
+#ifndef SPIFFS_LOCK
+#define SPIFFS_LOCK(fs)
+#endif
+
+#ifndef SPIFFS_UNLOCK
+#define SPIFFS_UNLOCK(fs)
+#endif
+
+// phys structs
+
+// spiffs spi configuration struct
+typedef struct {
+  // physical read function
+  spiffs_read hal_read_f;
+  // physical write function
+  spiffs_write hal_write_f;
+  // physical erase function
+  spiffs_erase hal_erase_f;
+#if SPIFFS_SINGLETON == 0
+  // physical size of the spi flash
+  u32_t phys_size;
+  // physical offset in spi flash used for spiffs,
+  // must be on block boundary
+  u32_t phys_addr;
+  // physical size when erasing a block
+  u32_t phys_erase_block;
+
+  // logical size of a block, must be on physical
+  // block size boundary and must never be less than
+  // a physical block
+  u32_t log_block_size;
+  // logical size of a page, must be at least
+  // log_block_size / 8
+  u32_t log_page_size;
+
+#endif
+#if SPIFFS_FILEHDL_OFFSET
+  // an integer offset added to each file handle
+  u16_t fh_ix_offset;
+#endif
+} spiffs_config;
+
+typedef struct spiffs_t {
+  // file system configuration
+  spiffs_config cfg;
+  // number of logical blocks
+  u32_t block_count;
+
+  // cursor for free blocks, block index
+  spiffs_block_ix free_cursor_block_ix;
+  // cursor for free blocks, entry index
+  int free_cursor_obj_lu_entry;
+  // cursor when searching, block index
+  spiffs_block_ix cursor_block_ix;
+  // cursor when searching, entry index
+  int cursor_obj_lu_entry;
+
+  // primary work buffer, size of a logical page
+  u8_t *lu_work;
+  // secondary work buffer, size of a logical page
+  u8_t *work;
+  // file descriptor memory area
+  u8_t *fd_space;
+  // available file descriptors
+  u32_t fd_count;
+
+  // last error
+  s32_t err_code;
+
+  // current number of free blocks
+  u32_t free_blocks;
+  // current number of busy pages
+  u32_t stats_p_allocated;
+  // current number of deleted pages
+  u32_t stats_p_deleted;
+  // flag indicating that garbage collector is cleaning
+  u8_t cleaning;
+  // max erase count amongst all blocks
+  spiffs_obj_id max_erase_count;
+
+#if SPIFFS_GC_STATS
+  u32_t stats_gc_runs;
+#endif
+
+#if SPIFFS_CACHE
+  // cache memory
+  void *cache;
+  // cache size
+  u32_t cache_size;
+#if SPIFFS_CACHE_STATS
+  u32_t cache_hits;
+  u32_t cache_misses;
+#endif
+#endif
+
+  // check callback function
+  spiffs_check_callback check_cb_f;
+  // file callback function
+  spiffs_file_callback file_cb_f;
+  // mounted flag
+  u8_t mounted;
+  // user data
+  void *user_data;
+  // config magic
+  u32_t config_magic;
+} spiffs;
+
+/* spiffs file status struct */
+typedef struct {
+  spiffs_obj_id obj_id;
+  u32_t size;
+  spiffs_obj_type type;
+  spiffs_page_ix pix;
+  u8_t name[SPIFFS_OBJ_NAME_LEN];
+#if SPIFFS_OBJ_META_LEN
+  u8_t meta[SPIFFS_OBJ_META_LEN];
+#endif
+} spiffs_stat;
+
+struct spiffs_dirent {
+  spiffs_obj_id obj_id;
+  u8_t name[SPIFFS_OBJ_NAME_LEN];
+  spiffs_obj_type type;
+  u32_t size;
+  spiffs_page_ix pix;
+#if SPIFFS_OBJ_META_LEN
+  u8_t meta[SPIFFS_OBJ_META_LEN];
+#endif
+};
+
+typedef struct {
+  spiffs *fs;
+  spiffs_block_ix block;
+  int entry;
+} spiffs_DIR;
+
+#if SPIFFS_IX_MAP
+
+typedef struct {
+  // buffer with looked up data pixes
+  spiffs_page_ix *map_buf;
+  // precise file byte offset
+  u32_t offset;
+  // start data span index of lookup buffer
+  spiffs_span_ix start_spix;
+  // end data span index of lookup buffer
+  spiffs_span_ix end_spix;
+} spiffs_ix_map;
+
+#endif
+
+// functions
+
+#if SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH && SPIFFS_SINGLETON==0
+/**
+ * Special function. This takes a spiffs config struct and returns the number
+ * of blocks this file system was formatted with. This function relies on
+ * that following info is set correctly in given config struct:
+ *
+ * phys_addr, log_page_size, and log_block_size.
+ *
+ * Also, hal_read_f must be set in the config struct.
+ *
+ * One must be sure of the correct page size and that the physical address is
+ * correct in the probed file system when calling this function. It is not
+ * checked if the phys_addr actually points to the start of the file system,
+ * so one might get a false positive if entering a phys_addr somewhere in the
+ * middle of the file system at block boundary. In addition, it is not checked
+ * if the page size is actually correct. If it is not, weird file system sizes
+ * will be returned.
+ *
+ * If this function detects a file system it returns the assumed file system
+ * size, which can be used to set the phys_size.
+ *
+ * Otherwise, it returns an error indicating why it is not regarded as a file
+ * system.
+ *
+ * Note: this function is not protected with SPIFFS_LOCK and SPIFFS_UNLOCK
+ * macros. It returns the error code directly, instead of as read by
+ * SPIFFS_errno.
+ *
+ * @param config        essential parts of the physical and logical
+ *                      configuration of the file system.
+ */
+s32_t SPIFFS_probe_fs(spiffs_config *config);
+#endif // SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH && SPIFFS_SINGLETON==0
+
+/**
+ * Initializes the file system dynamic parameters and mounts the filesystem.
+ * If SPIFFS_USE_MAGIC is enabled the mounting may fail with SPIFFS_ERR_NOT_A_FS
+ * if the flash does not contain a recognizable file system.
+ * In this case, SPIFFS_format must be called prior to remounting.
+ * @param fs            the file system struct
+ * @param config        the physical and logical configuration of the file system
+ * @param work          a memory work buffer comprising 2*config->log_page_size
+ *                      bytes used throughout all file system operations
+ * @param fd_space      memory for file descriptors
+ * @param fd_space_size memory size of file descriptors
+ * @param cache         memory for cache, may be null
+ * @param cache_size    memory size of cache
+ * @param check_cb_f    callback function for reporting during consistency checks
+ */
+s32_t SPIFFS_mount(spiffs *fs, spiffs_config *config, u8_t *work,
+    u8_t *fd_space, u32_t fd_space_size,
+    void *cache, u32_t cache_size,
+    spiffs_check_callback check_cb_f);
+
+/**
+ * Unmounts the file system. All file handles will be flushed of any
+ * cached writes and closed.
+ * @param fs            the file system struct
+ */
+void SPIFFS_unmount(spiffs *fs);
+
+/**
+ * Creates a new file.
+ * @param fs            the file system struct
+ * @param path          the path of the new file
+ * @param mode          ignored, for posix compliance
+ */
+s32_t SPIFFS_creat(spiffs *fs, const char *path, spiffs_mode mode);
+
+/**
+ * Opens/creates a file.
+ * @param fs            the file system struct
+ * @param path          the path of the new file
+ * @param flags         the flags for the open command, can be combinations of
+ *                      SPIFFS_O_APPEND, SPIFFS_O_TRUNC, SPIFFS_O_CREAT, SPIFFS_O_RDONLY,
+ *                      SPIFFS_O_WRONLY, SPIFFS_O_RDWR, SPIFFS_O_DIRECT, SPIFFS_O_EXCL
+ * @param mode          ignored, for posix compliance
+ */
+spiffs_file SPIFFS_open(spiffs *fs, const char *path, spiffs_flags flags, spiffs_mode mode);
+
+/**
+ * Opens a file by given dir entry.
+ * Optimization purposes, when traversing a file system with SPIFFS_readdir
+ * a normal SPIFFS_open would need to traverse the filesystem again to find
+ * the file, whilst SPIFFS_open_by_dirent already knows where the file resides.
+ * @param fs            the file system struct
+ * @param e             the dir entry to the file
+ * @param flags         the flags for the open command, can be combinations of
+ *                      SPIFFS_APPEND, SPIFFS_TRUNC, SPIFFS_CREAT, SPIFFS_RD_ONLY,
+ *                      SPIFFS_WR_ONLY, SPIFFS_RDWR, SPIFFS_DIRECT.
+ *                      SPIFFS_CREAT will have no effect in this case.
+ * @param mode          ignored, for posix compliance
+ */
+spiffs_file SPIFFS_open_by_dirent(spiffs *fs, struct spiffs_dirent *e, spiffs_flags flags, spiffs_mode mode);
+
+/**
+ * Opens a file by given page index.
+ * Optimization purposes, opens a file by directly pointing to the page
+ * index in the spi flash.
+ * If the page index does not point to a file header SPIFFS_ERR_NOT_A_FILE
+ * is returned.
+ * @param fs            the file system struct
+ * @param page_ix       the page index
+ * @param flags         the flags for the open command, can be combinations of
+ *                      SPIFFS_APPEND, SPIFFS_TRUNC, SPIFFS_CREAT, SPIFFS_RD_ONLY,
+ *                      SPIFFS_WR_ONLY, SPIFFS_RDWR, SPIFFS_DIRECT.
+ *                      SPIFFS_CREAT will have no effect in this case.
+ * @param mode          ignored, for posix compliance
+ */
+spiffs_file SPIFFS_open_by_page(spiffs *fs, spiffs_page_ix page_ix, spiffs_flags flags, spiffs_mode mode);
+
+/**
+ * Reads from given filehandle.
+ * @param fs            the file system struct
+ * @param fh            the filehandle
+ * @param buf           where to put read data
+ * @param len           how much to read
+ * @returns number of bytes read, or -1 if error
+ */
+s32_t SPIFFS_read(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
+
+/**
+ * Writes to given filehandle.
+ * @param fs            the file system struct
+ * @param fh            the filehandle
+ * @param buf           the data to write
+ * @param len           how much to write
+ * @returns number of bytes written, or -1 if error
+ */
+s32_t SPIFFS_write(spiffs *fs, spiffs_file fh, void *buf, s32_t len);
+
+/**
+ * Moves the read/write file offset. Resulting offset is returned or negative if error.
+ * lseek(fs, fd, 0, SPIFFS_SEEK_CUR) will thus return current offset.
+ * @param fs            the file system struct
+ * @param fh            the filehandle
+ * @param offs          how much/where to move the offset
+ * @param whence        if SPIFFS_SEEK_SET, the file offset shall be set to offset bytes
+ *                      if SPIFFS_SEEK_CUR, the file offset shall be set to its current location plus offset
+ *                      if SPIFFS_SEEK_END, the file offset shall be set to the size of the file plus offse, which should be negative
+ */
+s32_t SPIFFS_lseek(spiffs *fs, spiffs_file fh, s32_t offs, int whence);
+
+/**
+ * Removes a file by path
+ * @param fs            the file system struct
+ * @param path          the path of the file to remove
+ */
+s32_t SPIFFS_remove(spiffs *fs, const char *path);
+
+/**
+ * Removes a file by filehandle
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to remove
+ */
+s32_t SPIFFS_fremove(spiffs *fs, spiffs_file fh);
+
+/**
+ * Gets file status by path
+ * @param fs            the file system struct
+ * @param path          the path of the file to stat
+ * @param s             the stat struct to populate
+ */
+s32_t SPIFFS_stat(spiffs *fs, const char *path, spiffs_stat *s);
+
+/**
+ * Gets file status by filehandle
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to stat
+ * @param s             the stat struct to populate
+ */
+s32_t SPIFFS_fstat(spiffs *fs, spiffs_file fh, spiffs_stat *s);
+
+/**
+ * Flushes all pending write operations from cache for given file
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to flush
+ */
+s32_t SPIFFS_fflush(spiffs *fs, spiffs_file fh);
+
+/**
+ * Closes a filehandle. If there are pending write operations, these are finalized before closing.
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to close
+ */
+s32_t SPIFFS_close(spiffs *fs, spiffs_file fh);
+
+/**
+ * Renames a file
+ * @param fs            the file system struct
+ * @param old           path of file to rename
+ * @param newPath       new path of file
+ */
+s32_t SPIFFS_rename(spiffs *fs, const char *old, const char *newPath);
+
+#if SPIFFS_OBJ_META_LEN
+/**
+ * Updates file's metadata
+ * @param fs            the file system struct
+ * @param path          path to the file
+ * @param meta          new metadata. must be SPIFFS_OBJ_META_LEN bytes long.
+ */
+s32_t SPIFFS_update_meta(spiffs *fs, const char *name, const void *meta);
+
+/**
+ * Updates file's metadata
+ * @param fs            the file system struct
+ * @param fh            file handle of the file
+ * @param meta          new metadata. must be SPIFFS_OBJ_META_LEN bytes long.
+ */
+s32_t SPIFFS_fupdate_meta(spiffs *fs, spiffs_file fh, const void *meta);
+#endif
+
+/**
+ * Returns last error of last file operation.
+ * @param fs            the file system struct
+ */
+s32_t SPIFFS_errno(spiffs *fs);
+
+/**
+ * Clears last error.
+ * @param fs            the file system struct
+ */
+void SPIFFS_clearerr(spiffs *fs);
+
+/**
+ * Opens a directory stream corresponding to the given name.
+ * The stream is positioned at the first entry in the directory.
+ * On hydrogen builds the name argument is ignored as hydrogen builds always correspond
+ * to a flat file structure - no directories.
+ * @param fs            the file system struct
+ * @param name          the name of the directory
+ * @param d             pointer the directory stream to be populated
+ */
+spiffs_DIR *SPIFFS_opendir(spiffs *fs, const char *name, spiffs_DIR *d);
+
+/**
+ * Closes a directory stream
+ * @param d             the directory stream to close
+ */
+s32_t SPIFFS_closedir(spiffs_DIR *d);
+
+/**
+ * Reads a directory into given spifs_dirent struct.
+ * @param d             pointer to the directory stream
+ * @param e             the dirent struct to be populated
+ * @returns null if error or end of stream, else given dirent is returned
+ */
+struct spiffs_dirent *SPIFFS_readdir(spiffs_DIR *d, struct spiffs_dirent *e);
+
+/**
+ * Runs a consistency check on given filesystem.
+ * @param fs            the file system struct
+ */
+s32_t SPIFFS_check(spiffs *fs);
+
+/**
+ * Returns number of total bytes available and number of used bytes.
+ * This is an estimation, and depends on if there a many files with little
+ * data or few files with much data.
+ * NB: If used number of bytes exceeds total bytes, a SPIFFS_check should
+ * run. This indicates a power loss in midst of things. In worst case
+ * (repeated powerlosses in mending or gc) you might have to delete some files.
+ *
+ * @param fs            the file system struct
+ * @param total         total number of bytes in filesystem
+ * @param used          used number of bytes in filesystem
+ */
+s32_t SPIFFS_info(spiffs *fs, u32_t *total, u32_t *used);
+
+/**
+ * Formats the entire file system. All data will be lost.
+ * The filesystem must not be mounted when calling this.
+ *
+ * NB: formatting is awkward. Due to backwards compatibility, SPIFFS_mount
+ * MUST be called prior to formatting in order to configure the filesystem.
+ * If SPIFFS_mount succeeds, SPIFFS_unmount must be called before calling
+ * SPIFFS_format.
+ * If SPIFFS_mount fails, SPIFFS_format can be called directly without calling
+ * SPIFFS_unmount first.
+ *
+ * @param fs            the file system struct
+ */
+s32_t SPIFFS_format(spiffs *fs);
+
+/**
+ * Returns nonzero if spiffs is mounted, or zero if unmounted.
+ * @param fs            the file system struct
+ */
+u8_t SPIFFS_mounted(spiffs *fs);
+
+/**
+ * Tries to find a block where most or all pages are deleted, and erase that
+ * block if found. Does not care for wear levelling. Will not move pages
+ * around.
+ * If parameter max_free_pages are set to 0, only blocks with only deleted
+ * pages will be selected.
+ *
+ * NB: the garbage collector is automatically called when spiffs needs free
+ * pages. The reason for this function is to give possibility to do background
+ * tidying when user knows the system is idle.
+ *
+ * Use with care.
+ *
+ * Setting max_free_pages to anything larger than zero will eventually wear
+ * flash more as a block containing free pages can be erased.
+ *
+ * Will set err_no to SPIFFS_OK if a block was found and erased,
+ * SPIFFS_ERR_NO_DELETED_BLOCK if no matching block was found,
+ * or other error.
+ *
+ * @param fs             the file system struct
+ * @param max_free_pages maximum number allowed free pages in block
+ */
+s32_t SPIFFS_gc_quick(spiffs *fs, u16_t max_free_pages);
+
+/**
+ * Will try to make room for given amount of bytes in the filesystem by moving
+ * pages and erasing blocks.
+ * If it is physically impossible, err_no will be set to SPIFFS_ERR_FULL. If
+ * there already is this amount (or more) of free space, SPIFFS_gc will
+ * silently return. It is recommended to call SPIFFS_info before invoking
+ * this method in order to determine what amount of bytes to give.
+ *
+ * NB: the garbage collector is automatically called when spiffs needs free
+ * pages. The reason for this function is to give possibility to do background
+ * tidying when user knows the system is idle.
+ *
+ * Use with care.
+ *
+ * @param fs            the file system struct
+ * @param size          amount of bytes that should be freed
+ */
+s32_t SPIFFS_gc(spiffs *fs, u32_t size);
+
+/**
+ * Check if EOF reached.
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to check
+ */
+s32_t SPIFFS_eof(spiffs *fs, spiffs_file fh);
+
+/**
+ * Get position in file.
+ * @param fs            the file system struct
+ * @param fh            the filehandle of the file to check
+ */
+s32_t SPIFFS_tell(spiffs *fs, spiffs_file fh);
+
+/**
+ * Registers a callback function that keeps track on operations on file
+ * headers. Do note, that this callback is called from within internal spiffs
+ * mechanisms. Any operations on the actual file system being callbacked from
+ * in this callback will mess things up for sure - do not do this.
+ * This can be used to track where files are and move around during garbage
+ * collection, which in turn can be used to build location tables in ram.
+ * Used in conjuction with SPIFFS_open_by_page this may improve performance
+ * when opening a lot of files.
+ * Must be invoked after mount.
+ *
+ * @param fs            the file system struct
+ * @param cb_func       the callback on file operations
+ */
+s32_t SPIFFS_set_file_callback_func(spiffs *fs, spiffs_file_callback cb_func);
+
+#if SPIFFS_IX_MAP
+
+/**
+ * Maps the first level index lookup to a given memory map.
+ * This will make reading big files faster, as the memory map will be used for
+ * looking up data pages instead of searching for the indices on the physical
+ * medium. When mapping, all affected indicies are found and the information is
+ * copied to the array.
+ * Whole file or only parts of it may be mapped. The index map will cover file
+ * contents from argument offset until and including arguments (offset+len).
+ * It is valid to map a longer range than the current file size. The map will
+ * then be populated when the file grows.
+ * On garbage collections and file data page movements, the map array will be
+ * automatically updated. Do not tamper with the map array, as this contains
+ * the references to the data pages. Modifying it from outside will corrupt any
+ * future readings using this file descriptor.
+ * The map will no longer be used when the file descriptor closed or the file
+ * is unmapped.
+ * This can be useful to get faster and more deterministic timing when reading
+ * large files, or when seeking and reading a lot within a file.
+ * @param fs      the file system struct
+ * @param fh      the file handle of the file to map
+ * @param map     a spiffs_ix_map struct, describing the index map
+ * @param offset  absolute file offset where to start the index map
+ * @param len     length of the mapping in actual file bytes
+ * @param map_buf the array buffer for the look up data - number of required
+ *                elements in the array can be derived from function
+ *                SPIFFS_bytes_to_ix_map_entries given the length
+ */
+s32_t SPIFFS_ix_map(spiffs *fs, spiffs_file fh, spiffs_ix_map *map,
+    u32_t offset, u32_t len, spiffs_page_ix *map_buf);
+
+/**
+ * Unmaps the index lookup from this filehandle. All future readings will
+ * proceed as normal, requiring reading of the first level indices from
+ * physical media.
+ * The map and map buffer given in function SPIFFS_ix_map will no longer be
+ * referenced by spiffs.
+ * It is not strictly necessary to unmap a file before closing it, as closing
+ * a file will automatically unmap it.
+ * @param fs      the file system struct
+ * @param fh      the file handle of the file to unmap
+ */
+s32_t SPIFFS_ix_unmap(spiffs *fs, spiffs_file fh);
+
+/**
+ * Moves the offset for the index map given in function SPIFFS_ix_map. Parts or
+ * all of the map buffer will repopulated.
+ * @param fs      the file system struct
+ * @param fh      the mapped file handle of the file to remap
+ * @param offset  new absolute file offset where to start the index map
+ */
+s32_t SPIFFS_ix_remap(spiffs *fs, spiffs_file fh, u32_t offs);
+
+/**
+ * Utility function to get number of spiffs_page_ix entries a map buffer must
+ * contain on order to map given amount of file data in bytes.
+ * See function SPIFFS_ix_map and SPIFFS_ix_map_entries_to_bytes.
+ * @param fs      the file system struct
+ * @param bytes   number of file data bytes to map
+ * @return        needed number of elements in a spiffs_page_ix array needed to
+ *                map given amount of bytes in a file
+ */
+s32_t SPIFFS_bytes_to_ix_map_entries(spiffs *fs, u32_t bytes);
+
+/**
+ * Utility function to amount of file data bytes that can be mapped when
+ * mapping a file with buffer having given number of spiffs_page_ix entries.
+ * See function SPIFFS_ix_map and SPIFFS_bytes_to_ix_map_entries.
+ * @param fs      the file system struct
+ * @param map_page_ix_entries   number of entries in a spiffs_page_ix array
+ * @return        amount of file data in bytes that can be mapped given a map
+ *                buffer having given amount of spiffs_page_ix entries
+ */
+s32_t SPIFFS_ix_map_entries_to_bytes(spiffs *fs, u32_t map_page_ix_entries);
+
+#endif // SPIFFS_IX_MAP
+
+
+#if SPIFFS_TEST_VISUALISATION
+/**
+ * Prints out a visualization of the filesystem.
+ * @param fs            the file system struct
+ */
+s32_t SPIFFS_vis(spiffs *fs);
+#endif
+
+#if SPIFFS_BUFFER_HELP
+/**
+ * Returns number of bytes needed for the filedescriptor buffer given
+ * amount of file descriptors.
+ */
+u32_t SPIFFS_buffer_bytes_for_filedescs(spiffs *fs, u32_t num_descs);
+
+#if SPIFFS_CACHE
+/**
+ * Returns number of bytes needed for the cache buffer given
+ * amount of cache pages.
+ */
+u32_t SPIFFS_buffer_bytes_for_cache(spiffs *fs, u32_t num_pages);
+#endif
+#endif
+
+#if SPIFFS_CACHE
+#endif
+#if defined(__cplusplus)
+}
+#endif
+
+#endif /* SPIFFS_H_ */

components/mkspiffs/src/spiffs/spiffs_cache.c

@@ -0,0 +1,314 @@
+/*
+ * spiffs_cache.c
+ *
+ *  Created on: Jun 23, 2013
+ *      Author: petera
+ */
+
+#include "spiffs.h"
+#include "spiffs_nucleus.h"
+
+#if SPIFFS_CACHE
+
+// returns cached page for give page index, or null if no such cached page
+static spiffs_cache_page *spiffs_cache_page_get(spiffs *fs, spiffs_page_ix pix) {
+  spiffs_cache *cache = spiffs_get_cache(fs);
+  if ((cache->cpage_use_map & cache->cpage_use_mask) == 0) return 0;
+  int i;
+  for (i = 0; i < cache->cpage_count; i++) {
+    spiffs_cache_page *cp = spiffs_get_cache_page_hdr(fs, cache, i);
+    if ((cache->cpage_use_map & (1<<i)) &&
+        (cp->flags & SPIFFS_CACHE_FLAG_TYPE_WR) == 0 &&
+        cp->pix == pix ) {
+      SPIFFS_CACHE_DBG("CACHE_GET: have cache page "_SPIPRIi" for "_SPIPRIpg"\n", i, pix);
+      cp->last_access = cache->last_access;
+      return cp;
+    }
+  }
+  //SPIFFS_CACHE_DBG("CACHE_GET: no cache for "_SPIPRIpg"\n", pix);
+  return 0;
+}
+
+// frees cached page
+static s32_t spiffs_cache_page_free(spiffs *fs, int ix, u8_t write_back) {
+  s32_t res = SPIFFS_OK;
+  spiffs_cache *cache = spiffs_get_cache(fs);
+  spiffs_cache_page *cp = spiffs_get_cache_page_hdr(fs, cache, ix);
+  if (cache->cpage_use_map & (1<<ix)) {
+    if (write_back &&
+        (cp->flags & SPIFFS_CACHE_FLAG_TYPE_WR) == 0 &&
+        (cp->flags & SPIFFS_CACHE_FLAG_DIRTY)) {
+      u8_t *mem =  spiffs_get_cache_page(fs, cache, ix);
+      res = SPIFFS_HAL_WRITE(fs, SPIFFS_PAGE_TO_PADDR(fs, cp->pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), mem);
+    }
+
+    cp->flags = 0;
+    cache->cpage_use_map &= ~(1 << ix);
+
+    if (cp->flags & SPIFFS_CACHE_FLAG_TYPE_WR) {
+      SPIFFS_CACHE_DBG("CACHE_FREE: free cache page "_SPIPRIi" objid "_SPIPRIid"\n", ix, cp->obj_id);
+    } else {
+      SPIFFS_CACHE_DBG("CACHE_FREE: free cache page "_SPIPRIi" pix "_SPIPRIpg"\n", ix, cp->pix);
+    }
+  }
+
+  return res;
+}
+
+// removes the oldest accessed cached page
+static s32_t spiffs_cache_page_remove_oldest(spiffs *fs, u8_t flag_mask, u8_t flags) {
+  s32_t res = SPIFFS_OK;
+  spiffs_cache *cache = spiffs_get_cache(fs);
+
+  if ((cache->cpage_use_map & cache->cpage_use_mask) != cache->cpage_use_mask) {
+    // at least one free cpage
+    return SPIFFS_OK;
+  }
+
+  // all busy, scan thru all to find the cpage which has oldest access
+  int i;
+  int cand_ix = -1;
+  u32_t oldest_val = 0;
+  for (i = 0; i < cache->cpage_count; i++) {
+    spiffs_cache_page *cp = spiffs_get_cache_page_hdr(fs, cache, i);
+    if ((cache->last_access - cp->last_access) > oldest_val &&
+        (cp->flags & flag_mask) == flags) {
+      oldest_val = cache->last_access - cp->last_access;
+      cand_ix = i;
+    }
+  }
+
+  if (cand_ix >= 0) {
+    res = spiffs_cache_page_free(fs, cand_ix, 1);
+  }
+
+  return res;
+}
+
+// allocates a new cached page and returns it, or null if all cache pages are busy
+static spiffs_cache_page *spiffs_cache_page_allocate(spiffs *fs) {
+  spiffs_cache *cache = spiffs_get_cache(fs);
+  if (cache->cpage_use_map == 0xffffffff) {
+    // out of cache memory
+    return 0;
+  }
+  int i;
+  for (i = 0; i < cache->cpage_count; i++) {
+    if ((cache->cpage_use_map & (1<<i)) == 0) {
+      spiffs_cache_page *cp = spiffs_get_cache_page_hdr(fs, cache, i);
+      cache->cpage_use_map |= (1<<i);
+      cp->last_access = cache->last_access;
+      SPIFFS_CACHE_DBG("CACHE_ALLO: allocated cache page "_SPIPRIi"\n", i);
+      return cp;
+    }
+  }
+  // out of cache entries
+  return 0;
+}
+
+// drops the cache page for give page index
+void spiffs_cache_drop_page(spiffs *fs, spiffs_page_ix pix) {
+  spiffs_cache_page *cp =  spiffs_cache_page_get(fs, pix);
+  if (cp) {
+    spiffs_cache_page_free(fs, cp->ix, 0);
+  }
+}
+
+// ------------------------------
+
+// reads from spi flash or the cache
+s32_t spiffs_phys_rd(
+    spiffs *fs,
+    u8_t op,
+    spiffs_file fh,
+    u32_t addr,
+    u32_t len,
+    u8_t *dst) {
+  (void)fh;
+  s32_t res = SPIFFS_OK;
+  spiffs_cache *cache = spiffs_get_cache(fs);
+  spiffs_cache_page *cp =  spiffs_cache_page_get(fs, SPIFFS_PADDR_TO_PAGE(fs, addr));
+  cache->last_access++;
+  if (cp) {
+    // we've already got one, you see
+#if SPIFFS_CACHE_STATS
+    fs->cache_hits++;
+#endif
+    cp->last_access = cache->last_access;
+    u8_t *mem =  spiffs_get_cache_page(fs, cache, cp->ix);
+    memcpy(dst, &mem[SPIFFS_PADDR_TO_PAGE_OFFSET(fs, addr)], len);
+  } else {
+    if ((op & SPIFFS_OP_TYPE_MASK) == SPIFFS_OP_T_OBJ_LU2) {
+      // for second layer lookup functions, we do not cache in order to prevent shredding
+      return SPIFFS_HAL_READ(fs, addr, len, dst);
+    }
+#if SPIFFS_CACHE_STATS
+    fs->cache_misses++;
+#endif
+    // this operation will always free one cache page (unless all already free),
+    // the result code stems from the write operation of the possibly freed cache page
+    res = spiffs_cache_page_remove_oldest(fs, SPIFFS_CACHE_FLAG_TYPE_WR, 0);
+
+    cp = spiffs_cache_page_allocate(fs);
+    if (cp) {
+      cp->flags = SPIFFS_CACHE_FLAG_WRTHRU;
+      cp->pix = SPIFFS_PADDR_TO_PAGE(fs, addr);
+
+      s32_t res2 = SPIFFS_HAL_READ(fs,
+          addr - SPIFFS_PADDR_TO_PAGE_OFFSET(fs, addr),
+          SPIFFS_CFG_LOG_PAGE_SZ(fs),
+          spiffs_get_cache_page(fs, cache, cp->ix));
+      if (res2 != SPIFFS_OK) {
+        // honor read failure before possible write failure (bad idea?)
+        res = res2;
+      }
+      u8_t *mem =  spiffs_get_cache_page(fs, cache, cp->ix);
+      memcpy(dst, &mem[SPIFFS_PADDR_TO_PAGE_OFFSET(fs, addr)], len);
+    } else {
+      // this will never happen, last resort for sake of symmetry
+      s32_t res2 = SPIFFS_HAL_READ(fs, addr, len, dst);
+      if (res2 != SPIFFS_OK) {
+        // honor read failure before possible write failure (bad idea?)
+        res = res2;
+      }
+    }
+  }
+  return res;
+}
+
+// writes to spi flash and/or the cache
+s32_t spiffs_phys_wr(
+    spiffs *fs,
+    u8_t op,
+    spiffs_file fh,
+    u32_t addr,
+    u32_t len,
+    u8_t *src) {
+  (void)fh;
+  spiffs_page_ix pix = SPIFFS_PADDR_TO_PAGE(fs, addr);
+  spiffs_cache *cache = spiffs_get_cache(fs);
+  spiffs_cache_page *cp =  spiffs_cache_page_get(fs, pix);
+
+  if (cp && (op & SPIFFS_OP_COM_MASK) != SPIFFS_OP_C_WRTHRU) {
+    // have a cache page
+    // copy in data to cache page
+
+    if ((op & SPIFFS_OP_COM_MASK) == SPIFFS_OP_C_DELE &&
+        (op & SPIFFS_OP_TYPE_MASK) != SPIFFS_OP_T_OBJ_LU) {
+      // page is being deleted, wipe from cache - unless it is a lookup page
+      spiffs_cache_page_free(fs, cp->ix, 0);
+      return SPIFFS_HAL_WRITE(fs, addr, len, src);
+    }
+
+    u8_t *mem =  spiffs_get_cache_page(fs, cache, cp->ix);
+    memcpy(&mem[SPIFFS_PADDR_TO_PAGE_OFFSET(fs, addr)], src, len);
+
+    cache->last_access++;
+    cp->last_access = cache->last_access;
+
+    if (cp->flags & SPIFFS_CACHE_FLAG_WRTHRU) {
+      // page is being updated, no write-cache, just pass thru
+      return SPIFFS_HAL_WRITE(fs, addr, len, src);
+    } else {
+      return SPIFFS_OK;
+    }
+  } else {
+    // no cache page, no write cache - just write thru
+    return SPIFFS_HAL_WRITE(fs, addr, len, src);
+  }
+}
+
+#if SPIFFS_CACHE_WR
+// returns the cache page that this fd refers, or null if no cache page
+spiffs_cache_page *spiffs_cache_page_get_by_fd(spiffs *fs, spiffs_fd *fd) {
+  spiffs_cache *cache = spiffs_get_cache(fs);
+
+  if ((cache->cpage_use_map & cache->cpage_use_mask) == 0) {
+    // all cpages free, no cpage cannot be assigned to obj_id
+    return 0;
+  }
+
+  int i;
+  for (i = 0; i < cache->cpage_count; i++) {
+    spiffs_cache_page *cp = spiffs_get_cache_page_hdr(fs, cache, i);
+    if ((cache->cpage_use_map & (1<<i)) &&
+        (cp->flags & SPIFFS_CACHE_FLAG_TYPE_WR) &&
+        cp->obj_id == fd->obj_id) {
+      return cp;
+    }
+  }
+
+  return 0;
+}
+
+// allocates a new cache page and refers this to given fd - flushes an old cache
+// page if all cache is busy
+spiffs_cache_page *spiffs_cache_page_allocate_by_fd(spiffs *fs, spiffs_fd *fd) {
+  // before this function is called, it is ensured that there is no already existing
+  // cache page with same object id
+  spiffs_cache_page_remove_oldest(fs, SPIFFS_CACHE_FLAG_TYPE_WR, 0);
+  spiffs_cache_page *cp = spiffs_cache_page_allocate(fs);
+  if (cp == 0) {
+    // could not get cache page
+    return 0;
+  }
+
+  cp->flags = SPIFFS_CACHE_FLAG_TYPE_WR;
+  cp->obj_id = fd->obj_id;
+  fd->cache_page = cp;
+  return cp;
+}
+
+// unrefers all fds that this cache page refers to and releases the cache page
+void spiffs_cache_fd_release(spiffs *fs, spiffs_cache_page *cp) {
+  if (cp == 0) return;
+  u32_t i;
+  spiffs_fd *fds = (spiffs_fd *)fs->fd_space;
+  for (i = 0; i < fs->fd_count; i++) {
+    spiffs_fd *cur_fd = &fds[i];
+    if (cur_fd->file_nbr != 0 && cur_fd->cache_page == cp) {
+      cur_fd->cache_page = 0;
+    }
+  }
+  spiffs_cache_page_free(fs, cp->ix, 0);
+
+  cp->obj_id = 0;
+}
+
+#endif
+
+// initializes the cache
+void spiffs_cache_init(spiffs *fs) {
+  if (fs->cache == 0) return;
+  u32_t sz = fs->cache_size;
+  u32_t cache_mask = 0;
+  int i;
+  int cache_entries =
+      (sz - sizeof(spiffs_cache)) / (SPIFFS_CACHE_PAGE_SIZE(fs));
+  if (cache_entries <= 0) return;
+
+  for (i = 0; i < cache_entries; i++) {
+    cache_mask <<= 1;
+    cache_mask |= 1;
+  }
+
+  spiffs_cache cache;
+  memset(&cache, 0, sizeof(spiffs_cache));
+  cache.cpage_count = cache_entries;
+  cache.cpages = (u8_t *)((u8_t *)fs->cache + sizeof(spiffs_cache));
+
+  cache.cpage_use_map = 0xffffffff;
+  cache.cpage_use_mask = cache_mask;
+  memcpy(fs->cache, &cache, sizeof(spiffs_cache));
+
+  spiffs_cache *c = spiffs_get_cache(fs);
+
+  memset(c->cpages, 0, c->cpage_count * SPIFFS_CACHE_PAGE_SIZE(fs));
+
+  c->cpage_use_map &= ~(c->cpage_use_mask);
+  for (i = 0; i < cache.cpage_count; i++) {
+    spiffs_get_cache_page_hdr(fs, c, i)->ix = i;
+  }
+}
+
+#endif // SPIFFS_CACHE

components/mkspiffs/src/spiffs/spiffs_check.c

@@ -0,0 +1,995 @@
+/*
+ * spiffs_check.c
+ *
+ * Contains functionality for checking file system consistency
+ * and mending problems.
+ * Three levels of consistency checks are implemented:
+ *
+ * Look up consistency
+ *   Checks if indices in lookup pages are coherent with page headers
+ * Object index consistency
+ *   Checks if there are any orphaned object indices (missing object index headers).
+ *   If an object index is found but not its header, the object index is deleted.
+ *   This is critical for the following page consistency check.
+ * Page consistency
+ *   Checks for pages that ought to be indexed, ought not to be indexed, are multiple indexed
+ *
+ *
+ *  Created on: Jul 7, 2013
+ *      Author: petera
+ */
+
+
+#include "spiffs.h"
+#include "spiffs_nucleus.h"
+
+#if !SPIFFS_READ_ONLY
+
+#if SPIFFS_HAL_CALLBACK_EXTRA
+#define CHECK_CB(_fs, _type, _rep, _arg1, _arg2) \
+  do { \
+    if ((_fs)->check_cb_f) (_fs)->check_cb_f((_fs), (_type), (_rep), (_arg1), (_arg2)); \
+  } while (0)
+#else
+#define CHECK_CB(_fs, _type, _rep, _arg1, _arg2) \
+  do { \
+    if ((_fs)->check_cb_f) (_fs)->check_cb_f((_type), (_rep), (_arg1), (_arg2)); \
+  } while (0)
+#endif
+
+//---------------------------------------
+// Look up consistency
+
+// searches in the object indices and returns the referenced page index given
+// the object id and the data span index
+// destroys fs->lu_work
+static s32_t spiffs_object_get_data_page_index_reference(
+  spiffs *fs,
+  spiffs_obj_id obj_id,
+  spiffs_span_ix data_spix,
+  spiffs_page_ix *pix,
+  spiffs_page_ix *objix_pix) {
+  s32_t res;
+
+  // calculate object index span index for given data page span index
+  spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix);
+
+  // find obj index for obj id and span index
+  res = spiffs_obj_lu_find_id_and_span(fs, obj_id | SPIFFS_OBJ_ID_IX_FLAG, objix_spix, 0, objix_pix);
+  SPIFFS_CHECK_RES(res);
+
+  // load obj index entry
+  u32_t addr = SPIFFS_PAGE_TO_PADDR(fs, *objix_pix);
+  if (objix_spix == 0) {
+    // get referenced page from object index header
+    addr += sizeof(spiffs_page_object_ix_header) + data_spix * sizeof(spiffs_page_ix);
+  } else {
+    // get referenced page from object index
+    addr += sizeof(spiffs_page_object_ix) + SPIFFS_OBJ_IX_ENTRY(fs, data_spix) * sizeof(spiffs_page_ix);
+  }
+
+  res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ, 0, addr, sizeof(spiffs_page_ix), (u8_t *)pix);
+
+  return res;
+}
+
+// copies page contents to a new page
+static s32_t spiffs_rewrite_page(spiffs *fs, spiffs_page_ix cur_pix, spiffs_page_header *p_hdr, spiffs_page_ix *new_pix) {
+  s32_t res;
+  res = spiffs_page_allocate_data(fs, p_hdr->obj_id, p_hdr, 0,0,0,0, new_pix);
+  SPIFFS_CHECK_RES(res);
+  res = spiffs_phys_cpy(fs, 0,
+      SPIFFS_PAGE_TO_PADDR(fs, *new_pix) + sizeof(spiffs_page_header),
+      SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
+      SPIFFS_DATA_PAGE_SIZE(fs));
+  SPIFFS_CHECK_RES(res);
+  return res;
+}
+
+// rewrites the object index for given object id and replaces the
+// data page index to a new page index
+static s32_t spiffs_rewrite_index(spiffs *fs, spiffs_obj_id obj_id, spiffs_span_ix data_spix, spiffs_page_ix new_data_pix, spiffs_page_ix objix_pix) {
+  s32_t res;
+  spiffs_block_ix bix;
+  int entry;
+  spiffs_page_ix free_pix;
+  obj_id |= SPIFFS_OBJ_ID_IX_FLAG;
+
+  // find free entry
+  res = spiffs_obj_lu_find_free(fs, fs->free_cursor_block_ix, fs->free_cursor_obj_lu_entry, &bix, &entry);
+  SPIFFS_CHECK_RES(res);
+  free_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, entry);
+
+  // calculate object index span index for given data page span index
+  spiffs_span_ix objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, data_spix);
+  if (objix_spix == 0) {
+    // calc index in index header
+    entry = data_spix;
+  } else {
+    // calc entry in index
+    entry = SPIFFS_OBJ_IX_ENTRY(fs, data_spix);
+
+  }
+  // load index
+  res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+      0, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+  SPIFFS_CHECK_RES(res);
+  spiffs_page_header *objix_p_hdr = (spiffs_page_header *)fs->lu_work;
+
+  // be ultra safe, double check header against provided data
+  if (objix_p_hdr->obj_id != obj_id) {
+    spiffs_page_delete(fs, free_pix);
+    return SPIFFS_ERR_CHECK_OBJ_ID_MISM;
+  }
+  if (objix_p_hdr->span_ix != objix_spix) {
+    spiffs_page_delete(fs, free_pix);
+    return SPIFFS_ERR_CHECK_SPIX_MISM;
+  }
+  if ((objix_p_hdr->flags & (SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_IXDELE | SPIFFS_PH_FLAG_INDEX |
+                            SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET)) !=
+                                (SPIFFS_PH_FLAG_IXDELE | SPIFFS_PH_FLAG_DELET)) {
+    spiffs_page_delete(fs, free_pix);
+    return SPIFFS_ERR_CHECK_FLAGS_BAD;
+  }
+
+  // rewrite in mem
+  if (objix_spix == 0) {
+    ((spiffs_page_ix*)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix_header)))[data_spix] = new_data_pix;
+  } else {
+    ((spiffs_page_ix*)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, data_spix)] = new_data_pix;
+  }
+
+  res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT,
+      0, SPIFFS_PAGE_TO_PADDR(fs, free_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+  SPIFFS_CHECK_RES(res);
+  res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT,
+      0, SPIFFS_BLOCK_TO_PADDR(fs, SPIFFS_BLOCK_FOR_PAGE(fs, free_pix)) + SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, free_pix) * sizeof(spiffs_page_ix),
+      sizeof(spiffs_obj_id),
+      (u8_t *)&obj_id);
+  SPIFFS_CHECK_RES(res);
+  res = spiffs_page_delete(fs, objix_pix);
+
+  return res;
+}
+
+// deletes an object just by marking object index header as deleted
+static s32_t spiffs_delete_obj_lazy(spiffs *fs, spiffs_obj_id obj_id) {
+  spiffs_page_ix objix_hdr_pix;
+  s32_t res;
+  res = spiffs_obj_lu_find_id_and_span(fs, obj_id, 0, 0, &objix_hdr_pix);
+  if (res == SPIFFS_ERR_NOT_FOUND) {
+    return SPIFFS_OK;
+  }
+  SPIFFS_CHECK_RES(res);
+  u8_t flags = 0xff & ~SPIFFS_PH_FLAG_IXDELE;
+  res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_UPDT,
+      0, SPIFFS_PAGE_TO_PADDR(fs, objix_hdr_pix) + offsetof(spiffs_page_header, flags),
+      sizeof(u8_t),
+      (u8_t *)&flags);
+  return res;
+}
+
+// validates the given look up entry
+static s32_t spiffs_lookup_check_validate(spiffs *fs, spiffs_obj_id lu_obj_id, spiffs_page_header *p_hdr,
+    spiffs_page_ix cur_pix, spiffs_block_ix cur_block, int cur_entry, int *reload_lu) {
+  (void)cur_block;
+  (void)cur_entry;
+  u8_t delete_page = 0;
+  s32_t res = SPIFFS_OK;
+  spiffs_page_ix objix_pix;
+  spiffs_page_ix ref_pix;
+  // check validity, take actions
+  if (((lu_obj_id == SPIFFS_OBJ_ID_DELETED) && (p_hdr->flags & SPIFFS_PH_FLAG_DELET)) ||
+      ((lu_obj_id == SPIFFS_OBJ_ID_FREE) && (p_hdr->flags & SPIFFS_PH_FLAG_USED) == 0)) {
+    // look up entry deleted / free but used in page header
+    SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" deleted/free in lu but not on page\n", cur_pix);
+    *reload_lu = 1;
+    delete_page = 1;
+    if (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) {
+      // header says data page
+      // data page can be removed if not referenced by some object index
+      res = spiffs_object_get_data_page_index_reference(fs, p_hdr->obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
+      if (res == SPIFFS_ERR_NOT_FOUND) {
+        // no object with this id, so remove page safely
+        res = SPIFFS_OK;
+      } else {
+        SPIFFS_CHECK_RES(res);
+        if (ref_pix == cur_pix) {
+          // data page referenced by object index but deleted in lu
+          // copy page to new place and re-write the object index to new place
+          spiffs_page_ix new_pix;
+          res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
+          SPIFFS_CHECK_DBG("LU: FIXUP: data page not found elsewhere, rewriting "_SPIPRIpg" to new page "_SPIPRIpg"\n", cur_pix, new_pix);
+          SPIFFS_CHECK_RES(res);
+          *reload_lu = 1;
+          SPIFFS_CHECK_DBG("LU: FIXUP: "_SPIPRIpg" rewritten to "_SPIPRIpg", affected objix_pix "_SPIPRIpg"\n", cur_pix, new_pix, objix_pix);
+          res = spiffs_rewrite_index(fs, p_hdr->obj_id, p_hdr->span_ix, new_pix, objix_pix);
+          if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
+            // index bad also, cannot mend this file
+            SPIFFS_CHECK_DBG("LU: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
+            res = spiffs_page_delete(fs, new_pix);
+            SPIFFS_CHECK_RES(res);
+            res = spiffs_delete_obj_lazy(fs, p_hdr->obj_id);
+            CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr->obj_id, 0);
+          } else {
+            CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_INDEX, p_hdr->obj_id, p_hdr->span_ix);
+          }
+          SPIFFS_CHECK_RES(res);
+        }
+      }
+    } else {
+      // header says index page
+      // index page can be removed if other index with same obj_id and spanix is found
+      res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, 0);
+      if (res == SPIFFS_ERR_NOT_FOUND) {
+        // no such index page found, check for a data page amongst page headers
+        // lu cannot be trusted
+        res = spiffs_obj_lu_find_id_and_span_by_phdr(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, 0, 0);
+        if (res == SPIFFS_OK) { // ignore other errors
+          // got a data page also, assume lu corruption only, rewrite to new page
+          spiffs_page_ix new_pix;
+          res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
+          SPIFFS_CHECK_DBG("LU: FIXUP: ix page with data not found elsewhere, rewriting "_SPIPRIpg" to new page "_SPIPRIpg"\n", cur_pix, new_pix);
+          SPIFFS_CHECK_RES(res);
+          *reload_lu = 1;
+          CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
+        }
+      } else {
+        SPIFFS_CHECK_RES(res);
+      }
+    }
+  }
+  if (lu_obj_id != SPIFFS_OBJ_ID_FREE && lu_obj_id != SPIFFS_OBJ_ID_DELETED) {
+    // look up entry used
+    if ((p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG) != (lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG)) {
+      SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" differ in obj_id lu:"_SPIPRIid" ph:"_SPIPRIid"\n", cur_pix, lu_obj_id, p_hdr->obj_id);
+      delete_page = 1;
+      if ((p_hdr->flags & SPIFFS_PH_FLAG_DELET) == 0 ||
+          (p_hdr->flags & SPIFFS_PH_FLAG_FINAL) ||
+          (p_hdr->flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_IXDELE)) == 0) {
+        // page deleted or not finalized, just remove it
+      } else {
+        if (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) {
+          // if data page, check for reference to this page
+          res = spiffs_object_get_data_page_index_reference(fs, p_hdr->obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
+          if (res == SPIFFS_ERR_NOT_FOUND) {
+            // no object with this id, so remove page safely
+            res = SPIFFS_OK;
+          } else {
+            SPIFFS_CHECK_RES(res);
+            //   if found, rewrite page with object id, update index, and delete current
+            if (ref_pix == cur_pix) {
+              spiffs_page_ix new_pix;
+              res = spiffs_rewrite_page(fs, cur_pix, p_hdr, &new_pix);
+              SPIFFS_CHECK_RES(res);
+              res = spiffs_rewrite_index(fs, p_hdr->obj_id, p_hdr->span_ix, new_pix, objix_pix);
+              if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
+                // index bad also, cannot mend this file
+                SPIFFS_CHECK_DBG("LU: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
+                res = spiffs_page_delete(fs, new_pix);
+                SPIFFS_CHECK_RES(res);
+                res = spiffs_delete_obj_lazy(fs, p_hdr->obj_id);
+                *reload_lu = 1;
+                CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr->obj_id, 0);
+              }
+              SPIFFS_CHECK_RES(res);
+            }
+          }
+        } else {
+          // else if index, check for other pages with both obj_id's and spanix
+          spiffs_page_ix objix_pix_lu, objix_pix_ph;
+          // see if other object index page exists for lookup obj id and span index
+          res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, 0, &objix_pix_lu);
+          if (res == SPIFFS_ERR_NOT_FOUND) {
+            res = SPIFFS_OK;
+            objix_pix_lu = 0;
+          }
+          SPIFFS_CHECK_RES(res);
+          // see if other object index exists for page header obj id and span index
+          res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, 0, &objix_pix_ph);
+          if (res == SPIFFS_ERR_NOT_FOUND) {
+            res = SPIFFS_OK;
+            objix_pix_ph = 0;
+          }
+          SPIFFS_CHECK_RES(res);
+          //   if both obj_id's found, just delete current
+          if (objix_pix_ph == 0 || objix_pix_lu == 0) {
+            // otherwise try finding first corresponding data pages
+            spiffs_page_ix data_pix_lu, data_pix_ph;
+            // see if other data page exists for look up obj id and span index
+            res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &data_pix_lu);
+            if (res == SPIFFS_ERR_NOT_FOUND) {
+              res = SPIFFS_OK;
+              objix_pix_lu = 0;
+            }
+            SPIFFS_CHECK_RES(res);
+            // see if other data page exists for page header obj id and span index
+            res = spiffs_obj_lu_find_id_and_span(fs, p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &data_pix_ph);
+            if (res == SPIFFS_ERR_NOT_FOUND) {
+              res = SPIFFS_OK;
+              objix_pix_ph = 0;
+            }
+            SPIFFS_CHECK_RES(res);
+
+            spiffs_page_header new_ph;
+            new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL);
+            new_ph.span_ix = p_hdr->span_ix;
+            spiffs_page_ix new_pix;
+            if ((objix_pix_lu && data_pix_lu && data_pix_ph && objix_pix_ph == 0) ||
+                (objix_pix_lu == 0 && data_pix_ph && objix_pix_ph == 0)) {
+              //   got a data page for page header obj id
+              //   rewrite as obj_id_ph
+              new_ph.obj_id = p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG;
+              res = spiffs_rewrite_page(fs, cur_pix, &new_ph, &new_pix);
+              SPIFFS_CHECK_DBG("LU: FIXUP: rewrite page "_SPIPRIpg" as "_SPIPRIid" to pix "_SPIPRIpg"\n", cur_pix, new_ph.obj_id, new_pix);
+              CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
+              SPIFFS_CHECK_RES(res);
+              *reload_lu = 1;
+            } else if ((objix_pix_ph && data_pix_ph && data_pix_lu && objix_pix_lu == 0) ||
+                (objix_pix_ph == 0 && data_pix_lu && objix_pix_lu == 0)) {
+              //   got a data page for look up obj id
+              //   rewrite as obj_id_lu
+              new_ph.obj_id =  lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG;
+              SPIFFS_CHECK_DBG("LU: FIXUP: rewrite page "_SPIPRIpg" as "_SPIPRIid"\n", cur_pix, new_ph.obj_id);
+              CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
+              res = spiffs_rewrite_page(fs, cur_pix, &new_ph, &new_pix);
+              SPIFFS_CHECK_RES(res);
+              *reload_lu = 1;
+            } else {
+              // cannot safely do anything
+              SPIFFS_CHECK_DBG("LU: FIXUP: nothing to do, just delete\n");
+            }
+          }
+        }
+      }
+    } else if (((lu_obj_id & SPIFFS_OBJ_ID_IX_FLAG) && (p_hdr->flags & SPIFFS_PH_FLAG_INDEX)) ||
+        ((lu_obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0 && (p_hdr->flags & SPIFFS_PH_FLAG_INDEX) == 0)) {
+      SPIFFS_CHECK_DBG("LU: "_SPIPRIpg" lu/page index marking differ\n", cur_pix);
+      spiffs_page_ix data_pix, objix_pix_d;
+      // see if other data page exists for given obj id and span index
+      res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, &data_pix);
+      if (res == SPIFFS_ERR_NOT_FOUND) {
+        res = SPIFFS_OK;
+        data_pix = 0;
+      }
+      SPIFFS_CHECK_RES(res);
+      // see if other object index exists for given obj id and span index
+      res = spiffs_obj_lu_find_id_and_span(fs, lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG, p_hdr->span_ix, cur_pix, &objix_pix_d);
+      if (res == SPIFFS_ERR_NOT_FOUND) {
+        res = SPIFFS_OK;
+        objix_pix_d = 0;
+      }
+      SPIFFS_CHECK_RES(res);
+
+      delete_page = 1;
+      // if other data page exists and object index exists, just delete page
+      if (data_pix && objix_pix_d) {
+        SPIFFS_CHECK_DBG("LU: FIXUP: other index and data page exists, simply remove\n");
+      } else
+      // if only data page exists, make this page index
+      if (data_pix && objix_pix_d == 0) {
+        SPIFFS_CHECK_DBG("LU: FIXUP: other data page exists, make this index\n");
+        CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_INDEX, lu_obj_id, p_hdr->span_ix);
+        spiffs_page_header new_ph;
+        spiffs_page_ix new_pix;
+        new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_INDEX);
+        new_ph.obj_id = lu_obj_id | SPIFFS_OBJ_ID_IX_FLAG;
+        new_ph.span_ix = p_hdr->span_ix;
+        res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &new_pix);
+        SPIFFS_CHECK_RES(res);
+        res = spiffs_phys_cpy(fs, 0, SPIFFS_PAGE_TO_PADDR(fs, new_pix) + sizeof(spiffs_page_header),
+            SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
+            SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header));
+        SPIFFS_CHECK_RES(res);
+      } else
+      // if only index exists, make data page
+      if (data_pix == 0 && objix_pix_d) {
+        SPIFFS_CHECK_DBG("LU: FIXUP: other index page exists, make this data\n");
+        CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, lu_obj_id, p_hdr->span_ix);
+        spiffs_page_header new_ph;
+        spiffs_page_ix new_pix;
+        new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL);
+        new_ph.obj_id = lu_obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
+        new_ph.span_ix = p_hdr->span_ix;
+        res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &new_pix);
+        SPIFFS_CHECK_RES(res);
+        res = spiffs_phys_cpy(fs, 0, SPIFFS_PAGE_TO_PADDR(fs, new_pix) + sizeof(spiffs_page_header),
+            SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + sizeof(spiffs_page_header),
+            SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header));
+        SPIFFS_CHECK_RES(res);
+      } else {
+        // if nothing exists, we cannot safely make a decision - delete
+      }
+    }
+    else if ((p_hdr->flags & SPIFFS_PH_FLAG_DELET) == 0) {
+      SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" busy in lu but deleted on page\n", cur_pix);
+      delete_page = 1;
+    } else if ((p_hdr->flags & SPIFFS_PH_FLAG_FINAL)) {
+      SPIFFS_CHECK_DBG("LU: pix "_SPIPRIpg" busy but not final\n", cur_pix);
+      // page can be removed if not referenced by object index
+      *reload_lu = 1;
+      res = spiffs_object_get_data_page_index_reference(fs, lu_obj_id, p_hdr->span_ix, &ref_pix, &objix_pix);
+      if (res == SPIFFS_ERR_NOT_FOUND) {
+        // no object with this id, so remove page safely
+        res = SPIFFS_OK;
+        delete_page = 1;
+      } else {
+        SPIFFS_CHECK_RES(res);
+        if (ref_pix != cur_pix) {
+          SPIFFS_CHECK_DBG("LU: FIXUP: other finalized page is referred, just delete\n");
+          delete_page = 1;
+        } else {
+          // page referenced by object index but not final
+          // just finalize
+          SPIFFS_CHECK_DBG("LU: FIXUP: unfinalized page is referred, finalizing\n");
+          CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_FIX_LOOKUP, p_hdr->obj_id, p_hdr->span_ix);
+          u8_t flags = 0xff & ~SPIFFS_PH_FLAG_FINAL;
+          res = _spiffs_wr(fs, SPIFFS_OP_T_OBJ_DA | SPIFFS_OP_C_UPDT,
+              0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix) + offsetof(spiffs_page_header, flags),
+              sizeof(u8_t), (u8_t*)&flags);
+        }
+      }
+    }
+  }
+
+  if (delete_page) {
+    SPIFFS_CHECK_DBG("LU: FIXUP: deleting page "_SPIPRIpg"\n", cur_pix);
+    CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_DELETE_PAGE, cur_pix, 0);
+    res = spiffs_page_delete(fs, cur_pix);
+    SPIFFS_CHECK_RES(res);
+  }
+
+  return res;
+}
+
+static s32_t spiffs_lookup_check_v(spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix cur_block, int cur_entry,
+    const void *user_const_p, void *user_var_p) {
+  (void)user_const_p;
+  (void)user_var_p;
+  s32_t res = SPIFFS_OK;
+  spiffs_page_header p_hdr;
+  spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, cur_block, cur_entry);
+
+  CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS,
+      (cur_block * 256)/fs->block_count, 0);
+
+  // load header
+  res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+      0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+  SPIFFS_CHECK_RES(res);
+
+  int reload_lu = 0;
+
+  res = spiffs_lookup_check_validate(fs, obj_id, &p_hdr, cur_pix, cur_block, cur_entry, &reload_lu);
+  SPIFFS_CHECK_RES(res);
+
+  if (res == SPIFFS_OK) {
+    return reload_lu ? SPIFFS_VIS_COUNTINUE_RELOAD : SPIFFS_VIS_COUNTINUE;
+  }
+  return res;
+}
+
+
+// Scans all object look up. For each entry, corresponding page header is checked for validity.
+// If an object index header page is found, this is also checked
+s32_t spiffs_lookup_consistency_check(spiffs *fs, u8_t check_all_objects) {
+  (void)check_all_objects;
+  s32_t res = SPIFFS_OK;
+
+  CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS, 0, 0);
+
+  res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_lookup_check_v, 0, 0, 0, 0);
+
+  if (res == SPIFFS_VIS_END) {
+    res = SPIFFS_OK;
+  }
+
+  if (res != SPIFFS_OK) {
+    CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_ERROR, res, 0);
+  }
+
+  CHECK_CB(fs, SPIFFS_CHECK_LOOKUP, SPIFFS_CHECK_PROGRESS, 256, 0);
+
+  return res;
+}
+
+//---------------------------------------
+// Page consistency
+
+// Scans all pages (except lu pages), reserves 4 bits in working memory for each page
+// bit 0: 0 == FREE|DELETED, 1 == USED
+// bit 1: 0 == UNREFERENCED, 1 == REFERENCED
+// bit 2: 0 == NOT_INDEX,    1 == INDEX
+// bit 3: unused
+// A consistent file system will have only pages being
+//  * x000 free, unreferenced, not index
+//  * x011 used, referenced only once, not index
+//  * x101 used, unreferenced, index
+// The working memory might not fit all pages so several scans might be needed
+static s32_t spiffs_page_consistency_check_i(spiffs *fs) {
+  const u32_t bits = 4;
+  const spiffs_page_ix pages_per_scan = SPIFFS_CFG_LOG_PAGE_SZ(fs) * 8 / bits;
+
+  s32_t res = SPIFFS_OK;
+  spiffs_page_ix pix_offset = 0;
+
+  // for each range of pages fitting into work memory
+  while (pix_offset < SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count) {
+    // set this flag to abort all checks and rescan the page range
+    u8_t restart = 0;
+    memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs));
+
+    spiffs_block_ix cur_block = 0;
+    // build consistency bitmap for id range traversing all blocks
+    while (!restart && cur_block < fs->block_count) {
+      CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS,
+          (pix_offset*256)/(SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count) +
+          ((((cur_block * pages_per_scan * 256)/ (SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count))) / fs->block_count),
+          0);
+      // traverse each page except for lookup pages
+      spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_PAGES(fs) + SPIFFS_PAGES_PER_BLOCK(fs) * cur_block;
+      while (!restart && cur_pix < SPIFFS_PAGES_PER_BLOCK(fs) * (cur_block+1)) {
+        //if ((cur_pix & 0xff) == 0)
+        //  SPIFFS_CHECK_DBG("PA: processing pix "_SPIPRIpg", block "_SPIPRIbl" of pix "_SPIPRIpg", block "_SPIPRIbl"\n",
+        //      cur_pix, cur_block, SPIFFS_PAGES_PER_BLOCK(fs) * fs->block_count, fs->block_count);
+
+        // read header
+        spiffs_page_header p_hdr;
+        res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+            0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+        SPIFFS_CHECK_RES(res);
+
+        u8_t within_range = (cur_pix >= pix_offset && cur_pix < pix_offset + pages_per_scan);
+        const u32_t pix_byte_ix = (cur_pix - pix_offset) / (8/bits);
+        const u8_t pix_bit_ix = (cur_pix & ((8/bits)-1)) * bits;
+
+        if (within_range &&
+            (p_hdr.flags & SPIFFS_PH_FLAG_DELET) && (p_hdr.flags & SPIFFS_PH_FLAG_USED) == 0) {
+          // used
+          fs->work[pix_byte_ix] |= (1<<(pix_bit_ix + 0));
+        }
+        if ((p_hdr.flags & SPIFFS_PH_FLAG_DELET) &&
+            (p_hdr.flags & SPIFFS_PH_FLAG_IXDELE) &&
+            (p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_USED)) == 0) {
+          // found non-deleted index
+          if (within_range) {
+            fs->work[pix_byte_ix] |= (1<<(pix_bit_ix + 2));
+          }
+
+          // load non-deleted index
+          res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+              0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+          SPIFFS_CHECK_RES(res);
+
+          // traverse index for referenced pages
+          spiffs_page_ix *object_page_index;
+          spiffs_page_header *objix_p_hdr = (spiffs_page_header *)fs->lu_work;
+
+          int entries;
+          int i;
+          spiffs_span_ix data_spix_offset;
+          if (p_hdr.span_ix == 0) {
+            // object header page index
+            entries = SPIFFS_OBJ_HDR_IX_LEN(fs);
+            data_spix_offset = 0;
+            object_page_index = (spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix_header));
+          } else {
+            // object page index
+            entries = SPIFFS_OBJ_IX_LEN(fs);
+            data_spix_offset = SPIFFS_OBJ_HDR_IX_LEN(fs) + SPIFFS_OBJ_IX_LEN(fs) * (p_hdr.span_ix - 1);
+            object_page_index = (spiffs_page_ix *)((u8_t *)fs->lu_work + sizeof(spiffs_page_object_ix));
+          }
+
+          // for all entries in index
+          for (i = 0; !restart && i < entries; i++) {
+            spiffs_page_ix rpix = object_page_index[i];
+            u8_t rpix_within_range = rpix >= pix_offset && rpix < pix_offset + pages_per_scan;
+
+            if ((rpix != (spiffs_page_ix)-1 && rpix > SPIFFS_MAX_PAGES(fs))
+                || (rpix_within_range && SPIFFS_IS_LOOKUP_PAGE(fs, rpix))) {
+
+              // bad reference
+              SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg"x bad pix / LU referenced from page "_SPIPRIpg"\n",
+                  rpix, cur_pix);
+              // check for data page elsewhere
+              spiffs_page_ix data_pix;
+              res = spiffs_obj_lu_find_id_and_span(fs, objix_p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG,
+                  data_spix_offset + i, 0, &data_pix);
+              if (res == SPIFFS_ERR_NOT_FOUND) {
+                res = SPIFFS_OK;
+                data_pix = 0;
+              }
+              SPIFFS_CHECK_RES(res);
+              if (data_pix == 0) {
+                // if not, allocate free page
+                spiffs_page_header new_ph;
+                new_ph.flags = 0xff & ~(SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL);
+                new_ph.obj_id = objix_p_hdr->obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
+                new_ph.span_ix = data_spix_offset + i;
+                res = spiffs_page_allocate_data(fs, new_ph.obj_id, &new_ph, 0, 0, 0, 1, &data_pix);
+                SPIFFS_CHECK_RES(res);
+                SPIFFS_CHECK_DBG("PA: FIXUP: found no existing data page, created new @ "_SPIPRIpg"\n", data_pix);
+              }
+              // remap index
+              SPIFFS_CHECK_DBG("PA: FIXUP: rewriting index pix "_SPIPRIpg"\n", cur_pix);
+              res = spiffs_rewrite_index(fs, objix_p_hdr->obj_id | SPIFFS_OBJ_ID_IX_FLAG,
+                  data_spix_offset + i, data_pix, cur_pix);
+              if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
+                // index bad also, cannot mend this file
+                SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend - delete object\n", res);
+                CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, objix_p_hdr->obj_id, 0);
+                // delete file
+                res = spiffs_page_delete(fs, cur_pix);
+              } else {
+                CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, objix_p_hdr->obj_id, objix_p_hdr->span_ix);
+              }
+              SPIFFS_CHECK_RES(res);
+              restart = 1;
+
+            } else if (rpix_within_range) {
+
+              // valid reference
+              // read referenced page header
+              spiffs_page_header rp_hdr;
+              res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+                  0, SPIFFS_PAGE_TO_PADDR(fs, rpix), sizeof(spiffs_page_header), (u8_t*)&rp_hdr);
+              SPIFFS_CHECK_RES(res);
+
+              // cross reference page header check
+              if (rp_hdr.obj_id != (p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG) ||
+                  rp_hdr.span_ix != data_spix_offset + i ||
+                  (rp_hdr.flags & (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_USED)) !=
+                      (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_INDEX)) {
+               SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" has inconsistent page header ix id/span:"_SPIPRIid"/"_SPIPRIsp", ref id/span:"_SPIPRIid"/"_SPIPRIsp" flags:"_SPIPRIfl"\n",
+                    rpix, p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG, data_spix_offset + i,
+                    rp_hdr.obj_id, rp_hdr.span_ix, rp_hdr.flags);
+               // try finding correct page
+               spiffs_page_ix data_pix;
+               res = spiffs_obj_lu_find_id_and_span(fs, p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG,
+                   data_spix_offset + i, rpix, &data_pix);
+               if (res == SPIFFS_ERR_NOT_FOUND) {
+                 res = SPIFFS_OK;
+                 data_pix = 0;
+               }
+               SPIFFS_CHECK_RES(res);
+               if (data_pix == 0) {
+                 // not found, this index is badly borked
+                 SPIFFS_CHECK_DBG("PA: FIXUP: index bad, delete object id "_SPIPRIid"\n", p_hdr.obj_id);
+                 CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
+                 res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
+                 SPIFFS_CHECK_RES(res);
+                 break;
+               } else {
+                 // found it, so rewrite index
+                 SPIFFS_CHECK_DBG("PA: FIXUP: found correct data pix "_SPIPRIpg", rewrite ix pix "_SPIPRIpg" id "_SPIPRIid"\n",
+                     data_pix, cur_pix, p_hdr.obj_id);
+                 res = spiffs_rewrite_index(fs, p_hdr.obj_id, data_spix_offset + i, data_pix, cur_pix);
+                 if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
+                   // index bad also, cannot mend this file
+                   SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
+                   CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
+                   res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
+                 } else {
+                   CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, p_hdr.obj_id, p_hdr.span_ix);
+                 }
+                 SPIFFS_CHECK_RES(res);
+                 restart = 1;
+               }
+              }
+              else {
+                // mark rpix as referenced
+                const u32_t rpix_byte_ix = (rpix - pix_offset) / (8/bits);
+                const u8_t rpix_bit_ix = (rpix & ((8/bits)-1)) * bits;
+                if (fs->work[rpix_byte_ix] & (1<<(rpix_bit_ix + 1))) {
+                  SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" multiple referenced from page "_SPIPRIpg"\n",
+                      rpix, cur_pix);
+                  // Here, we should have fixed all broken references - getting this means there
+                  // must be multiple files with same object id. Only solution is to delete
+                  // the object which is referring to this page
+                  SPIFFS_CHECK_DBG("PA: FIXUP: removing object "_SPIPRIid" and page "_SPIPRIpg"\n",
+                      p_hdr.obj_id, cur_pix);
+                  CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
+                  res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
+                  SPIFFS_CHECK_RES(res);
+                  // extra precaution, delete this page also
+                  res = spiffs_page_delete(fs, cur_pix);
+                  SPIFFS_CHECK_RES(res);
+                  restart = 1;
+                }
+                fs->work[rpix_byte_ix] |= (1<<(rpix_bit_ix + 1));
+              }
+            }
+          } // for all index entries
+        } // found index
+
+        // next page
+        cur_pix++;
+      }
+      // next block
+      cur_block++;
+    }
+    // check consistency bitmap
+    if (!restart) {
+      spiffs_page_ix objix_pix;
+      spiffs_page_ix rpix;
+
+      u32_t byte_ix;
+      u8_t bit_ix;
+      for (byte_ix = 0; !restart && byte_ix < SPIFFS_CFG_LOG_PAGE_SZ(fs); byte_ix++) {
+        for (bit_ix = 0; !restart && bit_ix < 8/bits; bit_ix ++) {
+          u8_t bitmask = (fs->work[byte_ix] >> (bit_ix * bits)) & 0x7;
+          spiffs_page_ix cur_pix = pix_offset + byte_ix * (8/bits) + bit_ix;
+
+          // 000 ok - free, unreferenced, not index
+
+          if (bitmask == 0x1) {
+
+            // 001
+            SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" USED, UNREFERENCED, not index\n", cur_pix);
+
+            u8_t rewrite_ix_to_this = 0;
+            u8_t delete_page = 0;
+            // check corresponding object index entry
+            spiffs_page_header p_hdr;
+            res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+                0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+            SPIFFS_CHECK_RES(res);
+
+            res = spiffs_object_get_data_page_index_reference(fs, p_hdr.obj_id, p_hdr.span_ix,
+                &rpix, &objix_pix);
+            if (res == SPIFFS_OK) {
+              if (((rpix == (spiffs_page_ix)-1 || rpix > SPIFFS_MAX_PAGES(fs)) || (SPIFFS_IS_LOOKUP_PAGE(fs, rpix)))) {
+                // pointing to a bad page altogether, rewrite index to this
+                rewrite_ix_to_this = 1;
+                SPIFFS_CHECK_DBG("PA: corresponding ref is bad: "_SPIPRIpg", rewrite to this "_SPIPRIpg"\n", rpix, cur_pix);
+              } else {
+                // pointing to something else, check what
+                spiffs_page_header rp_hdr;
+                res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+                    0, SPIFFS_PAGE_TO_PADDR(fs, rpix), sizeof(spiffs_page_header), (u8_t*)&rp_hdr);
+                SPIFFS_CHECK_RES(res);
+                if (((p_hdr.obj_id & ~SPIFFS_OBJ_ID_IX_FLAG) == rp_hdr.obj_id) &&
+                    ((rp_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_USED | SPIFFS_PH_FLAG_FINAL)) ==
+                        (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_DELET))) {
+                  // pointing to something else valid, just delete this page then
+                  SPIFFS_CHECK_DBG("PA: corresponding ref is good but different: "_SPIPRIpg", delete this "_SPIPRIpg"\n", rpix, cur_pix);
+                  delete_page = 1;
+                } else {
+                  // pointing to something weird, update index to point to this page instead
+                  if (rpix != cur_pix) {
+                    SPIFFS_CHECK_DBG("PA: corresponding ref is weird: "_SPIPRIpg" %s%s%s%s, rewrite this "_SPIPRIpg"\n", rpix,
+                        (rp_hdr.flags & SPIFFS_PH_FLAG_INDEX) ? "" : "INDEX ",
+                            (rp_hdr.flags & SPIFFS_PH_FLAG_DELET) ? "" : "DELETED ",
+                                (rp_hdr.flags & SPIFFS_PH_FLAG_USED) ? "NOTUSED " : "",
+                                    (rp_hdr.flags & SPIFFS_PH_FLAG_FINAL) ? "NOTFINAL " : "",
+                        cur_pix);
+                    rewrite_ix_to_this = 1;
+                  } else {
+                    // should not happen, destined for fubar
+                  }
+                }
+              }
+            } else if (res == SPIFFS_ERR_NOT_FOUND) {
+              SPIFFS_CHECK_DBG("PA: corresponding ref not found, delete "_SPIPRIpg"\n", cur_pix);
+              delete_page = 1;
+              res = SPIFFS_OK;
+            }
+
+            if (rewrite_ix_to_this) {
+              // if pointing to invalid page, redirect index to this page
+              SPIFFS_CHECK_DBG("PA: FIXUP: rewrite index id "_SPIPRIid" data spix "_SPIPRIsp" to point to this pix: "_SPIPRIpg"\n",
+                  p_hdr.obj_id, p_hdr.span_ix, cur_pix);
+              res = spiffs_rewrite_index(fs, p_hdr.obj_id, p_hdr.span_ix, cur_pix, objix_pix);
+              if (res <= _SPIFFS_ERR_CHECK_FIRST && res > _SPIFFS_ERR_CHECK_LAST) {
+                // index bad also, cannot mend this file
+                SPIFFS_CHECK_DBG("PA: FIXUP: index bad "_SPIPRIi", cannot mend!\n", res);
+                CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_BAD_FILE, p_hdr.obj_id, 0);
+                res = spiffs_page_delete(fs, cur_pix);
+                SPIFFS_CHECK_RES(res);
+                res = spiffs_delete_obj_lazy(fs, p_hdr.obj_id);
+              } else {
+                CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_FIX_INDEX, p_hdr.obj_id, p_hdr.span_ix);
+              }
+              SPIFFS_CHECK_RES(res);
+              restart = 1;
+              continue;
+            } else if (delete_page) {
+              SPIFFS_CHECK_DBG("PA: FIXUP: deleting page "_SPIPRIpg"\n", cur_pix);
+              CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_DELETE_PAGE, cur_pix, 0);
+              res = spiffs_page_delete(fs, cur_pix);
+            }
+            SPIFFS_CHECK_RES(res);
+          }
+          if (bitmask == 0x2) {
+
+            // 010
+            SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, REFERENCED, not index\n", cur_pix);
+
+            // no op, this should be taken care of when checking valid references
+          }
+
+          // 011 ok - busy, referenced, not index
+
+          if (bitmask == 0x4) {
+
+            // 100
+            SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, unreferenced, INDEX\n", cur_pix);
+
+            // this should never happen, major fubar
+          }
+
+          // 101 ok - busy, unreferenced, index
+
+          if (bitmask == 0x6) {
+
+            // 110
+            SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" FREE, REFERENCED, INDEX\n", cur_pix);
+
+            // no op, this should be taken care of when checking valid references
+          }
+          if (bitmask == 0x7) {
+
+            // 111
+            SPIFFS_CHECK_DBG("PA: pix "_SPIPRIpg" USED, REFERENCED, INDEX\n", cur_pix);
+
+            // no op, this should be taken care of when checking valid references
+          }
+        }
+      }
+    }
+
+    SPIFFS_CHECK_DBG("PA: processed "_SPIPRIpg", restart "_SPIPRIi"\n", pix_offset, restart);
+    // next page range
+    if (!restart) {
+      pix_offset += pages_per_scan;
+    }
+  } // while page range not reached end
+  return res;
+}
+
+// Checks consistency amongst all pages and fixes irregularities
+s32_t spiffs_page_consistency_check(spiffs *fs) {
+  CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS, 0, 0);
+  s32_t res = spiffs_page_consistency_check_i(fs);
+  if (res != SPIFFS_OK) {
+    CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_ERROR, res, 0);
+  }
+  CHECK_CB(fs, SPIFFS_CHECK_PAGE, SPIFFS_CHECK_PROGRESS, 256, 0);
+  return res;
+}
+
+//---------------------------------------
+// Object index consistency
+
+// searches for given object id in temporary object id index,
+// returns the index or -1
+static int spiffs_object_index_search(spiffs *fs, spiffs_obj_id obj_id) {
+  u32_t i;
+  spiffs_obj_id *obj_table = (spiffs_obj_id *)fs->work;
+  obj_id &= ~SPIFFS_OBJ_ID_IX_FLAG;
+  for (i = 0; i < SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id); i++) {
+    if ((obj_table[i] & ~SPIFFS_OBJ_ID_IX_FLAG) == obj_id) {
+      return i;
+    }
+  }
+  return -1;
+}
+
+static s32_t spiffs_object_index_consistency_check_v(spiffs *fs, spiffs_obj_id obj_id, spiffs_block_ix cur_block,
+    int cur_entry, const void *user_const_p, void *user_var_p) {
+  (void)user_const_p;
+  s32_t res_c = SPIFFS_VIS_COUNTINUE;
+  s32_t res = SPIFFS_OK;
+  u32_t *log_ix = (u32_t*)user_var_p;
+  spiffs_obj_id *obj_table = (spiffs_obj_id *)fs->work;
+
+  CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_PROGRESS,
+      (cur_block * 256)/fs->block_count, 0);
+
+  if (obj_id != SPIFFS_OBJ_ID_FREE && obj_id != SPIFFS_OBJ_ID_DELETED && (obj_id & SPIFFS_OBJ_ID_IX_FLAG)) {
+    spiffs_page_header p_hdr;
+    spiffs_page_ix cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, cur_block, cur_entry);
+
+    // load header
+    res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+        0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+    SPIFFS_CHECK_RES(res);
+
+    if (p_hdr.span_ix == 0 &&
+        (p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) ==
+        (SPIFFS_PH_FLAG_DELET)) {
+      SPIFFS_CHECK_DBG("IX: pix "_SPIPRIpg", obj id:"_SPIPRIid" spix:"_SPIPRIsp" header not fully deleted - deleting\n",
+          cur_pix, obj_id, p_hdr.span_ix);
+      CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_DELETE_PAGE, cur_pix, obj_id);
+      res = spiffs_page_delete(fs, cur_pix);
+      SPIFFS_CHECK_RES(res);
+      return res_c;
+    }
+
+    if ((p_hdr.flags & (SPIFFS_PH_FLAG_INDEX | SPIFFS_PH_FLAG_FINAL | SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) ==
+        (SPIFFS_PH_FLAG_DELET | SPIFFS_PH_FLAG_IXDELE)) {
+      return res_c;
+    }
+
+    if (p_hdr.span_ix == 0) {
+      // objix header page, register objid as reachable
+      int r = spiffs_object_index_search(fs, obj_id);
+      if (r == -1) {
+        // not registered, do it
+        obj_table[*log_ix] = obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
+        (*log_ix)++;
+        if (*log_ix >= SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)) {
+          *log_ix = 0;
+        }
+      }
+    } else { // span index
+      // objix page, see if header can be found
+      int r = spiffs_object_index_search(fs, obj_id);
+      u8_t delete = 0;
+      if (r == -1) {
+        // not in temporary index, try finding it
+        spiffs_page_ix objix_hdr_pix;
+        res = spiffs_obj_lu_find_id_and_span(fs, obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, 0, &objix_hdr_pix);
+        res_c = SPIFFS_VIS_COUNTINUE_RELOAD;
+        if (res == SPIFFS_OK) {
+          // found, register as reachable
+          obj_table[*log_ix] = obj_id & ~SPIFFS_OBJ_ID_IX_FLAG;
+        } else if (res == SPIFFS_ERR_NOT_FOUND) {
+          // not found, register as unreachable
+          delete = 1;
+          obj_table[*log_ix] = obj_id | SPIFFS_OBJ_ID_IX_FLAG;
+        } else {
+          SPIFFS_CHECK_RES(res);
+        }
+        (*log_ix)++;
+        if (*log_ix >= SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id)) {
+          *log_ix = 0;
+        }
+      } else {
+        // in temporary index, check reachable flag
+        if ((obj_table[r] & SPIFFS_OBJ_ID_IX_FLAG)) {
+          // registered as unreachable
+          delete = 1;
+        }
+      }
+
+      if (delete) {
+        SPIFFS_CHECK_DBG("IX: FIXUP: pix "_SPIPRIpg", obj id:"_SPIPRIid" spix:"_SPIPRIsp" is orphan index - deleting\n",
+            cur_pix, obj_id, p_hdr.span_ix);
+        CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_DELETE_ORPHANED_INDEX, cur_pix, obj_id);
+        res = spiffs_page_delete(fs, cur_pix);
+        SPIFFS_CHECK_RES(res);
+      }
+    } // span index
+  } // valid object index id
+
+  return res_c;
+}
+
+// Removes orphaned and partially deleted index pages.
+// Scans for index pages. When an index page is found, corresponding index header is searched for.
+// If no such page exists, the index page cannot be reached as no index header exists and must be
+// deleted.
+s32_t spiffs_object_index_consistency_check(spiffs *fs) {
+  s32_t res = SPIFFS_OK;
+  // impl note:
+  // fs->work is used for a temporary object index memory, listing found object ids and
+  // indicating whether they can be reached or not. Acting as a fifo if object ids cannot fit.
+  // In the temporary object index memory, SPIFFS_OBJ_ID_IX_FLAG bit is used to indicate
+  // a reachable/unreachable object id.
+  memset(fs->work, 0, SPIFFS_CFG_LOG_PAGE_SZ(fs));
+  u32_t obj_id_log_ix = 0;
+  CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_PROGRESS, 0, 0);
+  res = spiffs_obj_lu_find_entry_visitor(fs, 0, 0, 0, 0, spiffs_object_index_consistency_check_v, 0, &obj_id_log_ix,
+        0, 0);
+  if (res == SPIFFS_VIS_END) {
+    res = SPIFFS_OK;
+  }
+  if (res != SPIFFS_OK) {
+    CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_ERROR, res, 0);
+  }
+  CHECK_CB(fs, SPIFFS_CHECK_INDEX, SPIFFS_CHECK_PROGRESS, 256, 0);
+  return res;
+}
+
+#endif // !SPIFFS_READ_ONLY

components/mkspiffs/src/spiffs/spiffs_config.h

@@ -0,0 +1,361 @@
+/*
+ * spiffs_config.h
+ *
+ *  Created on: Jul 3, 2013
+ *      Author: petera
+ */
+
+#ifndef SPIFFS_CONFIG_H_
+#define SPIFFS_CONFIG_H_
+
+// ----------- 8< ------------
+// Following includes are for the linux test build of spiffs
+// These may/should/must be removed/altered/replaced in your target
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <ctype.h>
+// ----------- >8 ------------
+
+typedef signed int s32_t;
+typedef unsigned int u32_t;
+typedef signed short s16_t;
+typedef unsigned short u16_t;
+typedef signed char s8_t;
+typedef unsigned char u8_t;
+
+// compile time switches
+
+// Set generic spiffs debug output call.
+#ifndef SPIFFS_DBG
+#define SPIFFS_DBG(...) //printf(__VA_ARGS__)
+#endif
+// Set spiffs debug output call for garbage collecting.
+#ifndef SPIFFS_GC_DBG
+#define SPIFFS_GC_DBG(...) //printf(__VA_ARGS__)
+#endif
+// Set spiffs debug output call for caching.
+#ifndef SPIFFS_CACHE_DBG
+#define SPIFFS_CACHE_DBG(...) //printf(__VA_ARGS__)
+#endif
+// Set spiffs debug output call for system consistency checks.
+#ifndef SPIFFS_CHECK_DBG
+#define SPIFFS_CHECK_DBG(...) //printf(__VA_ARGS__)
+#endif
+
+
+// Defines spiffs debug print formatters
+// some general signed number
+#ifndef _SPIPRIi
+#define _SPIPRIi   "%d"
+#endif
+// address
+#ifndef _SPIPRIad
+#define _SPIPRIad  "%08x"
+#endif
+// block
+#ifndef _SPIPRIbl
+#define _SPIPRIbl  "%04x"
+#endif
+// page
+#ifndef _SPIPRIpg
+#define _SPIPRIpg  "%04x"
+#endif
+// span index
+#ifndef _SPIPRIsp
+#define _SPIPRIsp  "%04x"
+#endif
+// file descriptor
+#ifndef _SPIPRIfd
+#define _SPIPRIfd  "%d"
+#endif
+// file object id
+#ifndef _SPIPRIid
+#define _SPIPRIid  "%04x"
+#endif
+// file flags
+#ifndef _SPIPRIfl
+#define _SPIPRIfl  "%02x"
+#endif
+
+// Enable/disable API functions to determine exact number of bytes
+// for filedescriptor and cache buffers. Once decided for a configuration,
+// this can be disabled to reduce flash.
+#ifndef SPIFFS_BUFFER_HELP
+#define SPIFFS_BUFFER_HELP              0
+#endif
+
+// Enables/disable memory read caching of nucleus file system operations.
+// If enabled, memory area must be provided for cache in SPIFFS_mount.
+#ifndef  SPIFFS_CACHE
+#define SPIFFS_CACHE                    1
+#endif
+#if SPIFFS_CACHE
+// Enables memory write caching for file descriptors in hydrogen
+#ifndef  SPIFFS_CACHE_WR
+#define SPIFFS_CACHE_WR                 1
+#endif
+
+// Enable/disable statistics on caching. Debug/test purpose only.
+#ifndef  SPIFFS_CACHE_STATS
+#define SPIFFS_CACHE_STATS              0
+#endif
+#endif
+
+// Always check header of each accessed page to ensure consistent state.
+// If enabled it will increase number of reads, will increase flash.
+#ifndef SPIFFS_PAGE_CHECK
+#define SPIFFS_PAGE_CHECK               1
+#endif
+
+// Define maximum number of gc runs to perform to reach desired free pages.
+#ifndef SPIFFS_GC_MAX_RUNS
+#define SPIFFS_GC_MAX_RUNS              5
+#endif
+
+// Enable/disable statistics on gc. Debug/test purpose only.
+#ifndef SPIFFS_GC_STATS
+#define SPIFFS_GC_STATS                 0
+#endif
+
+// Garbage collecting examines all pages in a block which and sums up
+// to a block score. Deleted pages normally gives positive score and
+// used pages normally gives a negative score (as these must be moved).
+// To have a fair wear-leveling, the erase age is also included in score,
+// whose factor normally is the most positive.
+// The larger the score, the more likely it is that the block will
+// picked for garbage collection.
+
+// Garbage collecting heuristics - weight used for deleted pages.
+#ifndef SPIFFS_GC_HEUR_W_DELET
+#define SPIFFS_GC_HEUR_W_DELET          (5)
+#endif
+// Garbage collecting heuristics - weight used for used pages.
+#ifndef SPIFFS_GC_HEUR_W_USED
+#define SPIFFS_GC_HEUR_W_USED           (-1)
+#endif
+// Garbage collecting heuristics - weight used for time between
+// last erased and erase of this block.
+#ifndef SPIFFS_GC_HEUR_W_ERASE_AGE
+#define SPIFFS_GC_HEUR_W_ERASE_AGE      (50)
+#endif
+
+// Object name maximum length. Note that this length include the
+// zero-termination character, meaning maximum string of characters
+// can at most be SPIFFS_OBJ_NAME_LEN - 1.
+#ifndef SPIFFS_OBJ_NAME_LEN
+#define SPIFFS_OBJ_NAME_LEN             (64)
+#endif
+
+// Maximum length of the metadata associated with an object.
+// Setting to non-zero value enables metadata-related API but also
+// changes the on-disk format, so the change is not backward-compatible.
+//
+// Do note: the meta length must never exceed
+// logical_page_size - (SPIFFS_OBJ_NAME_LEN + 64)
+//
+// This is derived from following:
+// logical_page_size - (SPIFFS_OBJ_NAME_LEN + sizeof(spiffs_page_header) +
+// spiffs_object_ix_header fields + at least some LUT entries)
+#ifndef SPIFFS_OBJ_META_LEN
+#define SPIFFS_OBJ_META_LEN             (64)
+#endif
+
+// Size of buffer allocated on stack used when copying data.
+// Lower value generates more read/writes. No meaning having it bigger
+// than logical page size.
+#ifndef SPIFFS_COPY_BUFFER_STACK
+#define SPIFFS_COPY_BUFFER_STACK        (256)
+#endif
+
+// Enable this to have an identifiable spiffs filesystem. This will look for
+// a magic in all sectors to determine if this is a valid spiffs system or
+// not on mount point. If not, SPIFFS_format must be called prior to mounting
+// again.
+#ifndef SPIFFS_USE_MAGIC
+#define SPIFFS_USE_MAGIC                (1)
+#endif
+
+#if SPIFFS_USE_MAGIC
+// Only valid when SPIFFS_USE_MAGIC is enabled. If SPIFFS_USE_MAGIC_LENGTH is
+// enabled, the magic will also be dependent on the length of the filesystem.
+// For example, a filesystem configured and formatted for 4 megabytes will not
+// be accepted for mounting with a configuration defining the filesystem as 2
+// megabytes.
+#ifndef SPIFFS_USE_MAGIC_LENGTH
+#define SPIFFS_USE_MAGIC_LENGTH         (1)
+#endif
+#endif
+
+// SPIFFS_LOCK and SPIFFS_UNLOCK protects spiffs from reentrancy on api level
+// These should be defined on a multithreaded system
+
+// define this to enter a mutex if you're running on a multithreaded system
+#ifndef SPIFFS_LOCK
+#define SPIFFS_LOCK(fs)
+#endif
+// define this to exit a mutex if you're running on a multithreaded system
+#ifndef SPIFFS_UNLOCK
+#define SPIFFS_UNLOCK(fs)
+#endif
+
+// Enable if only one spiffs instance with constant configuration will exist
+// on the target. This will reduce calculations, flash and memory accesses.
+// Parts of configuration must be defined below instead of at time of mount.
+#ifndef SPIFFS_SINGLETON
+#define SPIFFS_SINGLETON 0
+#endif
+
+#if SPIFFS_SINGLETON
+// Instead of giving parameters in config struct, singleton build must
+// give parameters in defines below.
+#ifndef SPIFFS_CFG_PHYS_SZ
+#define SPIFFS_CFG_PHYS_SZ(ignore)        (1024*1024*2)
+#endif
+#ifndef SPIFFS_CFG_PHYS_ERASE_SZ
+#define SPIFFS_CFG_PHYS_ERASE_SZ(ignore)  (65536)
+#endif
+#ifndef SPIFFS_CFG_PHYS_ADDR
+#define SPIFFS_CFG_PHYS_ADDR(ignore)      (0)
+#endif
+#ifndef SPIFFS_CFG_LOG_PAGE_SZ
+#define SPIFFS_CFG_LOG_PAGE_SZ(ignore)    (256)
+#endif
+#ifndef SPIFFS_CFG_LOG_BLOCK_SZ
+#define SPIFFS_CFG_LOG_BLOCK_SZ(ignore)   (65536)
+#endif
+#endif
+
+// Enable this if your target needs aligned data for index tables
+#ifndef SPIFFS_ALIGNED_OBJECT_INDEX_TABLES
+#define SPIFFS_ALIGNED_OBJECT_INDEX_TABLES       1
+#endif
+
+// Enable this if you want the HAL callbacks to be called with the spiffs struct
+#ifndef SPIFFS_HAL_CALLBACK_EXTRA
+#define SPIFFS_HAL_CALLBACK_EXTRA         0
+#endif
+
+// Enable this if you want to add an integer offset to all file handles
+// (spiffs_file). This is useful if running multiple instances of spiffs on
+// same target, in order to recognise to what spiffs instance a file handle
+// belongs.
+// NB: This adds config field fh_ix_offset in the configuration struct when
+// mounting, which must be defined.
+#ifndef SPIFFS_FILEHDL_OFFSET
+#define SPIFFS_FILEHDL_OFFSET                 0
+#endif
+
+// Enable this to compile a read only version of spiffs.
+// This will reduce binary size of spiffs. All code comprising modification
+// of the file system will not be compiled. Some config will be ignored.
+// HAL functions for erasing and writing to spi-flash may be null. Cache
+// can be disabled for even further binary size reduction (and ram savings).
+// Functions modifying the fs will return SPIFFS_ERR_RO_NOT_IMPL.
+// If the file system cannot be mounted due to aborted erase operation and
+// SPIFFS_USE_MAGIC is enabled, SPIFFS_ERR_RO_ABORTED_OPERATION will be
+// returned.
+// Might be useful for e.g. bootloaders and such.
+#ifndef SPIFFS_READ_ONLY
+#define SPIFFS_READ_ONLY                      0
+#endif
+
+// Enable this to add a temporal file cache using the fd buffer.
+// The effects of the cache is that SPIFFS_open will find the file faster in
+// certain cases. It will make it a lot easier for spiffs to find files
+// opened frequently, reducing number of readings from the spi flash for
+// finding those files.
+// This will grow each fd by 6 bytes. If your files are opened in patterns
+// with a degree of temporal locality, the system is optimized.
+// Examples can be letting spiffs serve web content, where one file is the css.
+// The css is accessed for each html file that is opened, meaning it is
+// accessed almost every second time a file is opened. Another example could be
+// a log file that is often opened, written, and closed.
+// The size of the cache is number of given file descriptors, as it piggybacks
+// on the fd update mechanism. The cache lives in the closed file descriptors.
+// When closed, the fd know the whereabouts of the file. Instead of forgetting
+// this, the temporal cache will keep handling updates to that file even if the
+// fd is closed. If the file is opened again, the location of the file is found
+// directly. If all available descriptors become opened, all cache memory is
+// lost.
+#ifndef SPIFFS_TEMPORAL_FD_CACHE
+#define SPIFFS_TEMPORAL_FD_CACHE              1
+#endif
+
+// Temporal file cache hit score. Each time a file is opened, all cached files
+// will lose one point. If the opened file is found in cache, that entry will
+// gain SPIFFS_TEMPORAL_CACHE_HIT_SCORE points. One can experiment with this
+// value for the specific access patterns of the application. However, it must
+// be between 1 (no gain for hitting a cached entry often) and 255.
+#ifndef SPIFFS_TEMPORAL_CACHE_HIT_SCORE
+#define SPIFFS_TEMPORAL_CACHE_HIT_SCORE       8
+#endif
+
+// Enable to be able to map object indices to memory.
+// This allows for faster and more deterministic reading if cases of reading
+// large files and when changing file offset by seeking around a lot.
+// When mapping a file's index, the file system will be scanned for index pages
+// and the info will be put in memory provided by user. When reading, the
+// memory map can be looked up instead of searching for index pages on the
+// medium. This way, user can trade memory against performance.
+// Whole, parts of, or future parts not being written yet can be mapped. The
+// memory array will be owned by spiffs and updated accordingly during garbage
+// collecting or when modifying the indices. The latter is invoked by when the
+// file is modified in some way. The index buffer is tied to the file
+// descriptor.
+#ifndef SPIFFS_IX_MAP
+#define SPIFFS_IX_MAP                         1
+#endif
+
+// Set SPIFFS_TEST_VISUALISATION to non-zero to enable SPIFFS_vis function
+// in the api. This function will visualize all filesystem using given printf
+// function.
+#ifndef SPIFFS_TEST_VISUALISATION
+#define SPIFFS_TEST_VISUALISATION         0
+#endif
+#if SPIFFS_TEST_VISUALISATION
+#ifndef spiffs_printf
+#define spiffs_printf(...)                printf(__VA_ARGS__)
+#endif
+// spiffs_printf argument for a free page
+#ifndef SPIFFS_TEST_VIS_FREE_STR
+#define SPIFFS_TEST_VIS_FREE_STR          "_"
+#endif
+// spiffs_printf argument for a deleted page
+#ifndef SPIFFS_TEST_VIS_DELE_STR
+#define SPIFFS_TEST_VIS_DELE_STR          "/"
+#endif
+// spiffs_printf argument for an index page for given object id
+#ifndef SPIFFS_TEST_VIS_INDX_STR
+#define SPIFFS_TEST_VIS_INDX_STR(id)      "i"
+#endif
+// spiffs_printf argument for a data page for given object id
+#ifndef SPIFFS_TEST_VIS_DATA_STR
+#define SPIFFS_TEST_VIS_DATA_STR(id)      "d"
+#endif
+#endif
+
+// Types depending on configuration such as the amount of flash bytes
+// given to spiffs file system in total (spiffs_file_system_size),
+// the logical block size (log_block_size), and the logical page size
+// (log_page_size)
+
+// Block index type. Make sure the size of this type can hold
+// the highest number of all blocks - i.e. spiffs_file_system_size / log_block_size
+typedef u16_t spiffs_block_ix;
+// Page index type. Make sure the size of this type can hold
+// the highest page number of all pages - i.e. spiffs_file_system_size / log_page_size
+typedef u16_t spiffs_page_ix;
+// Object id type - most significant bit is reserved for index flag. Make sure the
+// size of this type can hold the highest object id on a full system,
+// i.e. 2 + (spiffs_file_system_size / (2*log_page_size))*2
+typedef u16_t spiffs_obj_id;
+// Object span index type. Make sure the size of this type can
+// hold the largest possible span index on the system -
+// i.e. (spiffs_file_system_size / log_page_size) - 1
+typedef u16_t spiffs_span_ix;
+
+#endif /* SPIFFS_CONFIG_H_ */

components/mkspiffs/src/spiffs/spiffs_gc.c

@@ -0,0 +1,606 @@
+#include "spiffs.h"
+#include "spiffs_nucleus.h"
+
+#if !SPIFFS_READ_ONLY
+
+// Erases a logical block and updates the erase counter.
+// If cache is enabled, all pages that might be cached in this block
+// is dropped.
+static s32_t spiffs_gc_erase_block(
+    spiffs *fs,
+    spiffs_block_ix bix) {
+  s32_t res;
+
+  SPIFFS_GC_DBG("gc: erase block "_SPIPRIbl"\n", bix);
+  res = spiffs_erase_block(fs, bix);
+  SPIFFS_CHECK_RES(res);
+
+#if SPIFFS_CACHE
+  {
+    u32_t i;
+    for (i = 0; i < SPIFFS_PAGES_PER_BLOCK(fs); i++) {
+      spiffs_cache_drop_page(fs, SPIFFS_PAGE_FOR_BLOCK(fs, bix) + i);
+    }
+  }
+#endif
+  return res;
+}
+
+// Searches for blocks where all entries are deleted - if one is found,
+// the block is erased. Compared to the non-quick gc, the quick one ensures
+// that no updates are needed on existing objects on pages that are erased.
+s32_t spiffs_gc_quick(
+    spiffs *fs, u16_t max_free_pages) {
+  s32_t res = SPIFFS_OK;
+  u32_t blocks = fs->block_count;
+  spiffs_block_ix cur_block = 0;
+  u32_t cur_block_addr = 0;
+  int cur_entry = 0;
+  spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work;
+
+  SPIFFS_GC_DBG("gc_quick: running\n");
+#if SPIFFS_GC_STATS
+  fs->stats_gc_runs++;
+#endif
+
+  int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id));
+
+  // find fully deleted blocks
+  // check each block
+  while (res == SPIFFS_OK && blocks--) {
+    u16_t deleted_pages_in_block = 0;
+    u16_t free_pages_in_block = 0;
+
+    int obj_lookup_page = 0;
+    // check each object lookup page
+    while (res == SPIFFS_OK && obj_lookup_page < (int)SPIFFS_OBJ_LOOKUP_PAGES(fs)) {
+      int entry_offset = obj_lookup_page * entries_per_page;
+      res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+          0, cur_block_addr + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+      // check each entry
+      while (res == SPIFFS_OK &&
+          cur_entry - entry_offset < entries_per_page &&
+          cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) {
+        spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset];
+        if (obj_id == SPIFFS_OBJ_ID_DELETED) {
+          deleted_pages_in_block++;
+        } else if (obj_id == SPIFFS_OBJ_ID_FREE) {
+          // kill scan, go for next block
+          free_pages_in_block++;
+          if (free_pages_in_block > max_free_pages) {
+            obj_lookup_page = SPIFFS_OBJ_LOOKUP_PAGES(fs);
+            res = 1; // kill object lu loop
+            break;
+          }
+        }  else {
+          // kill scan, go for next block
+          obj_lookup_page = SPIFFS_OBJ_LOOKUP_PAGES(fs);
+          res = 1; // kill object lu loop
+          break;
+        }
+        cur_entry++;
+      } // per entry
+      obj_lookup_page++;
+    } // per object lookup page
+    if (res == 1) res = SPIFFS_OK;
+
+    if (res == SPIFFS_OK &&
+        deleted_pages_in_block + free_pages_in_block == SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs) &&
+        free_pages_in_block <= max_free_pages) {
+      // found a fully deleted block
+      fs->stats_p_deleted -= deleted_pages_in_block;
+      res = spiffs_gc_erase_block(fs, cur_block);
+      return res;
+    }
+
+    cur_entry = 0;
+    cur_block++;
+    cur_block_addr += SPIFFS_CFG_LOG_BLOCK_SZ(fs);
+  } // per block
+
+  if (res == SPIFFS_OK) {
+    res = SPIFFS_ERR_NO_DELETED_BLOCKS;
+  }
+  return res;
+}
+
+// Checks if garbage collecting is necessary. If so a candidate block is found,
+// cleansed and erased
+s32_t spiffs_gc_check(
+    spiffs *fs,
+    u32_t len) {
+  s32_t res;
+  s32_t free_pages =
+      (SPIFFS_PAGES_PER_BLOCK(fs) - SPIFFS_OBJ_LOOKUP_PAGES(fs)) * (fs->block_count-2)
+      - fs->stats_p_allocated - fs->stats_p_deleted;
+  int tries = 0;
+
+  if (fs->free_blocks > 3 &&
+      (s32_t)len < free_pages * (s32_t)SPIFFS_DATA_PAGE_SIZE(fs)) {
+    return SPIFFS_OK;
+  }
+
+  u32_t needed_pages = (len + SPIFFS_DATA_PAGE_SIZE(fs) - 1) / SPIFFS_DATA_PAGE_SIZE(fs);
+//  if (fs->free_blocks <= 2 && (s32_t)needed_pages > free_pages) {
+//    SPIFFS_GC_DBG("gc: full freeblk:"_SPIPRIi" needed:"_SPIPRIi" free:"_SPIPRIi" dele:"_SPIPRIi"\n", fs->free_blocks, needed_pages, free_pages, fs->stats_p_deleted);
+//    return SPIFFS_ERR_FULL;
+//  }
+  if ((s32_t)needed_pages > (s32_t)(free_pages + fs->stats_p_deleted)) {
+    SPIFFS_GC_DBG("gc_check: full freeblk:"_SPIPRIi" needed:"_SPIPRIi" free:"_SPIPRIi" dele:"_SPIPRIi"\n", fs->free_blocks, needed_pages, free_pages, fs->stats_p_deleted);
+    return SPIFFS_ERR_FULL;
+  }
+
+  do {
+    SPIFFS_GC_DBG("\ngc_check #"_SPIPRIi": run gc free_blocks:"_SPIPRIi" pfree:"_SPIPRIi" pallo:"_SPIPRIi" pdele:"_SPIPRIi" ["_SPIPRIi"] len:"_SPIPRIi" of "_SPIPRIi"\n",
+        tries,
+        fs->free_blocks, free_pages, fs->stats_p_allocated, fs->stats_p_deleted, (free_pages+fs->stats_p_allocated+fs->stats_p_deleted),
+        len, (u32_t)(free_pages*SPIFFS_DATA_PAGE_SIZE(fs)));
+
+    spiffs_block_ix *cands;
+    int count;
+    spiffs_block_ix cand;
+    s32_t prev_free_pages = free_pages;
+    // if the fs is crammed, ignore block age when selecting candidate - kind of a bad state
+    res = spiffs_gc_find_candidate(fs, &cands, &count, free_pages <= 0);
+    SPIFFS_CHECK_RES(res);
+    if (count == 0) {
+      SPIFFS_GC_DBG("gc_check: no candidates, return\n");
+      return (s32_t)needed_pages < free_pages ? SPIFFS_OK : SPIFFS_ERR_FULL;
+    }
+#if SPIFFS_GC_STATS
+    fs->stats_gc_runs++;
+#endif
+    cand = cands[0];
+    fs->cleaning = 1;
+    //SPIFFS_GC_DBG("gcing: cleaning block "_SPIPRIi"\n", cand);
+    res = spiffs_gc_clean(fs, cand);
+    fs->cleaning = 0;
+    if (res < 0) {
+      SPIFFS_GC_DBG("gc_check: cleaning block "_SPIPRIi", result "_SPIPRIi"\n", cand, res);
+    } else {
+      SPIFFS_GC_DBG("gc_check: cleaning block "_SPIPRIi", result "_SPIPRIi"\n", cand, res);
+    }
+    SPIFFS_CHECK_RES(res);
+
+    res = spiffs_gc_erase_page_stats(fs, cand);
+    SPIFFS_CHECK_RES(res);
+
+    res = spiffs_gc_erase_block(fs, cand);
+    SPIFFS_CHECK_RES(res);
+
+    free_pages =
+          (SPIFFS_PAGES_PER_BLOCK(fs) - SPIFFS_OBJ_LOOKUP_PAGES(fs)) * (fs->block_count - 2)
+          - fs->stats_p_allocated - fs->stats_p_deleted;
+
+    if (prev_free_pages <= 0 && prev_free_pages == free_pages) {
+      // abort early to reduce wear, at least tried once
+      SPIFFS_GC_DBG("gc_check: early abort, no result on gc when fs crammed\n");
+      break;
+    }
+
+  } while (++tries < SPIFFS_GC_MAX_RUNS && (fs->free_blocks <= 2 ||
+      (s32_t)len > free_pages*(s32_t)SPIFFS_DATA_PAGE_SIZE(fs)));
+
+  free_pages =
+        (SPIFFS_PAGES_PER_BLOCK(fs) - SPIFFS_OBJ_LOOKUP_PAGES(fs)) * (fs->block_count - 2)
+        - fs->stats_p_allocated - fs->stats_p_deleted;
+  if ((s32_t)len > free_pages*(s32_t)SPIFFS_DATA_PAGE_SIZE(fs)) {
+    res = SPIFFS_ERR_FULL;
+  }
+
+  SPIFFS_GC_DBG("gc_check: finished, "_SPIPRIi" dirty, blocks "_SPIPRIi" free, "_SPIPRIi" pages free, "_SPIPRIi" tries, res "_SPIPRIi"\n",
+      fs->stats_p_allocated + fs->stats_p_deleted,
+      fs->free_blocks, free_pages, tries, res);
+
+  return res;
+}
+
+// Updates page statistics for a block that is about to be erased
+s32_t spiffs_gc_erase_page_stats(
+    spiffs *fs,
+    spiffs_block_ix bix) {
+  s32_t res = SPIFFS_OK;
+  int obj_lookup_page = 0;
+  int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id));
+  spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work;
+  int cur_entry = 0;
+  u32_t dele = 0;
+  u32_t allo = 0;
+
+  // check each object lookup page
+  while (res == SPIFFS_OK && obj_lookup_page < (int)SPIFFS_OBJ_LOOKUP_PAGES(fs)) {
+    int entry_offset = obj_lookup_page * entries_per_page;
+    res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+        0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+    // check each entry
+    while (res == SPIFFS_OK &&
+        cur_entry - entry_offset < entries_per_page && cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) {
+      spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset];
+      if (obj_id == SPIFFS_OBJ_ID_FREE) {
+      } else if (obj_id == SPIFFS_OBJ_ID_DELETED) {
+        dele++;
+      } else {
+        allo++;
+      }
+      cur_entry++;
+    } // per entry
+    obj_lookup_page++;
+  } // per object lookup page
+  SPIFFS_GC_DBG("gc_check: wipe pallo:"_SPIPRIi" pdele:"_SPIPRIi"\n", allo, dele);
+  fs->stats_p_allocated -= allo;
+  fs->stats_p_deleted -= dele;
+  return res;
+}
+
+// Finds block candidates to erase
+s32_t spiffs_gc_find_candidate(
+    spiffs *fs,
+    spiffs_block_ix **block_candidates,
+    int *candidate_count,
+    char fs_crammed) {
+  s32_t res = SPIFFS_OK;
+  u32_t blocks = fs->block_count;
+  spiffs_block_ix cur_block = 0;
+  u32_t cur_block_addr = 0;
+  spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work;
+  int cur_entry = 0;
+
+  // using fs->work area as sorted candidate memory, (spiffs_block_ix)cand_bix/(s32_t)score
+  int max_candidates = MIN(fs->block_count, (SPIFFS_CFG_LOG_PAGE_SZ(fs)-8)/(sizeof(spiffs_block_ix) + sizeof(s32_t)));
+  *candidate_count = 0;
+  memset(fs->work, 0xff, SPIFFS_CFG_LOG_PAGE_SZ(fs));
+
+  // divide up work area into block indices and scores
+  spiffs_block_ix *cand_blocks = (spiffs_block_ix *)fs->work;
+  s32_t *cand_scores = (s32_t *)(fs->work + max_candidates * sizeof(spiffs_block_ix));
+
+   // align cand_scores on s32_t boundary
+  cand_scores = (s32_t*)(((intptr_t)cand_scores + sizeof(intptr_t) - 1) & ~(sizeof(intptr_t) - 1));
+
+  *block_candidates = cand_blocks;
+
+  int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id));
+
+  // check each block
+  while (res == SPIFFS_OK && blocks--) {
+    u16_t deleted_pages_in_block = 0;
+    u16_t used_pages_in_block = 0;
+
+    int obj_lookup_page = 0;
+    // check each object lookup page
+    while (res == SPIFFS_OK && obj_lookup_page < (int)SPIFFS_OBJ_LOOKUP_PAGES(fs)) {
+      int entry_offset = obj_lookup_page * entries_per_page;
+      res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+          0, cur_block_addr + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+      // check each entry
+      while (res == SPIFFS_OK &&
+          cur_entry - entry_offset < entries_per_page &&
+          cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) {
+        spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset];
+        if (obj_id == SPIFFS_OBJ_ID_FREE) {
+          // when a free entry is encountered, scan logic ensures that all following entries are free also
+          res = 1; // kill object lu loop
+          break;
+        } else  if (obj_id == SPIFFS_OBJ_ID_DELETED) {
+          deleted_pages_in_block++;
+        } else {
+          used_pages_in_block++;
+        }
+        cur_entry++;
+      } // per entry
+      obj_lookup_page++;
+    } // per object lookup page
+    if (res == 1) res = SPIFFS_OK;
+
+    // calculate score and insert into candidate table
+    // stoneage sort, but probably not so many blocks
+    if (res == SPIFFS_OK /*&& deleted_pages_in_block > 0*/) {
+      // read erase count
+      spiffs_obj_id erase_count;
+      res = _spiffs_rd(fs, SPIFFS_OP_C_READ | SPIFFS_OP_T_OBJ_LU2, 0,
+          SPIFFS_ERASE_COUNT_PADDR(fs, cur_block),
+          sizeof(spiffs_obj_id), (u8_t *)&erase_count);
+      SPIFFS_CHECK_RES(res);
+
+      spiffs_obj_id erase_age;
+      if (fs->max_erase_count > erase_count) {
+        erase_age = fs->max_erase_count - erase_count;
+      } else {
+        erase_age = SPIFFS_OBJ_ID_FREE - (erase_count - fs->max_erase_count);
+      }
+
+      s32_t score =
+          deleted_pages_in_block * SPIFFS_GC_HEUR_W_DELET +
+          used_pages_in_block * SPIFFS_GC_HEUR_W_USED +
+          erase_age * (fs_crammed ? 0 : SPIFFS_GC_HEUR_W_ERASE_AGE);
+      int cand_ix = 0;
+      SPIFFS_GC_DBG("gc_check: bix:"_SPIPRIbl" del:"_SPIPRIi" use:"_SPIPRIi" score:"_SPIPRIi"\n", cur_block, deleted_pages_in_block, used_pages_in_block, score);
+      while (cand_ix < max_candidates) {
+        if (cand_blocks[cand_ix] == (spiffs_block_ix)-1) {
+          cand_blocks[cand_ix] = cur_block;
+          cand_scores[cand_ix] = score;
+          break;
+        } else if (cand_scores[cand_ix] < score) {
+          int reorder_cand_ix = max_candidates - 2;
+          while (reorder_cand_ix >= cand_ix) {
+            cand_blocks[reorder_cand_ix + 1] = cand_blocks[reorder_cand_ix];
+            cand_scores[reorder_cand_ix + 1] = cand_scores[reorder_cand_ix];
+            reorder_cand_ix--;
+          }
+          cand_blocks[cand_ix] = cur_block;
+          cand_scores[cand_ix] = score;
+          break;
+        }
+        cand_ix++;
+      }
+      (*candidate_count)++;
+    }
+
+    cur_entry = 0;
+    cur_block++;
+    cur_block_addr += SPIFFS_CFG_LOG_BLOCK_SZ(fs);
+  } // per block
+
+  return res;
+}
+
+typedef enum {
+  FIND_OBJ_DATA,
+  MOVE_OBJ_DATA,
+  MOVE_OBJ_IX,
+  FINISHED
+} spiffs_gc_clean_state;
+
+typedef struct {
+  spiffs_gc_clean_state state;
+  spiffs_obj_id cur_obj_id;
+  spiffs_span_ix cur_objix_spix;
+  spiffs_page_ix cur_objix_pix;
+  spiffs_page_ix cur_data_pix;
+  int stored_scan_entry_index;
+  u8_t obj_id_found;
+} spiffs_gc;
+
+// Empties given block by moving all data into free pages of another block
+// Strategy:
+//   loop:
+//   scan object lookup for object data pages
+//   for first found id, check spix and load corresponding object index page to memory
+//   push object scan lookup entry index
+//     rescan object lookup, find data pages with same id and referenced by same object index
+//     move data page, update object index in memory
+//     when reached end of lookup, store updated object index
+//   pop object scan lookup entry index
+//   repeat loop until end of object lookup
+//   scan object lookup again for remaining object index pages, move to new page in other block
+//
+s32_t spiffs_gc_clean(spiffs *fs, spiffs_block_ix bix) {
+  s32_t res = SPIFFS_OK;
+  const int entries_per_page = (SPIFFS_CFG_LOG_PAGE_SZ(fs) / sizeof(spiffs_obj_id));
+  // this is the global localizer being pushed and popped
+  int cur_entry = 0;
+  spiffs_obj_id *obj_lu_buf = (spiffs_obj_id *)fs->lu_work;
+  spiffs_gc gc; // our stack frame/state
+  spiffs_page_ix cur_pix = 0;
+  spiffs_page_object_ix_header *objix_hdr = (spiffs_page_object_ix_header *)fs->work;
+  spiffs_page_object_ix *objix = (spiffs_page_object_ix *)fs->work;
+
+  SPIFFS_GC_DBG("gc_clean: cleaning block "_SPIPRIbl"\n", bix);
+
+  memset(&gc, 0, sizeof(spiffs_gc));
+  gc.state = FIND_OBJ_DATA;
+
+  if (fs->free_cursor_block_ix == bix) {
+    // move free cursor to next block, cannot use free pages from the block we want to clean
+    fs->free_cursor_block_ix = (bix+1)%fs->block_count;
+    fs->free_cursor_obj_lu_entry = 0;
+    SPIFFS_GC_DBG("gc_clean: move free cursor to block "_SPIPRIbl"\n", fs->free_cursor_block_ix);
+  }
+
+  while (res == SPIFFS_OK && gc.state != FINISHED) {
+    SPIFFS_GC_DBG("gc_clean: state = "_SPIPRIi" entry:"_SPIPRIi"\n", gc.state, cur_entry);
+    gc.obj_id_found = 0; // reset (to no found data page)
+
+    // scan through lookup pages
+    int obj_lookup_page = cur_entry / entries_per_page;
+    u8_t scan = 1;
+    // check each object lookup page
+    while (scan && res == SPIFFS_OK && obj_lookup_page < (int)SPIFFS_OBJ_LOOKUP_PAGES(fs)) {
+      int entry_offset = obj_lookup_page * entries_per_page;
+      res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+          0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page),
+          SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+      // check each object lookup entry
+      while (scan && res == SPIFFS_OK &&
+          cur_entry - entry_offset < entries_per_page && cur_entry < (int)(SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))) {
+        spiffs_obj_id obj_id = obj_lu_buf[cur_entry-entry_offset];
+        cur_pix = SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, bix, cur_entry);
+
+        // act upon object id depending on gc state
+        switch (gc.state) {
+        case FIND_OBJ_DATA:
+          // find a data page
+          if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE &&
+              ((obj_id & SPIFFS_OBJ_ID_IX_FLAG) == 0)) {
+            // found a data page, stop scanning and handle in switch case below
+            SPIFFS_GC_DBG("gc_clean: FIND_DATA state:"_SPIPRIi" - found obj id "_SPIPRIid"\n", gc.state, obj_id);
+            gc.obj_id_found = 1;
+            gc.cur_obj_id = obj_id;
+            gc.cur_data_pix = cur_pix;
+            scan = 0;
+          }
+          break;
+        case MOVE_OBJ_DATA:
+          // evacuate found data pages for corresponding object index we have in memory,
+          // update memory representation
+          if (obj_id == gc.cur_obj_id) {
+            spiffs_page_header p_hdr;
+            res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+                0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+            SPIFFS_CHECK_RES(res);
+            SPIFFS_GC_DBG("gc_clean: MOVE_DATA found data page "_SPIPRIid":"_SPIPRIsp" @ "_SPIPRIpg"\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix);
+            if (SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix) != gc.cur_objix_spix) {
+              SPIFFS_GC_DBG("gc_clean: MOVE_DATA no objix spix match, take in another run\n");
+            } else {
+              spiffs_page_ix new_data_pix;
+              if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) {
+                // move page
+                res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_data_pix);
+                SPIFFS_GC_DBG("gc_clean: MOVE_DATA move objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg" to "_SPIPRIpg"\n", gc.cur_obj_id, p_hdr.span_ix, cur_pix, new_data_pix);
+                SPIFFS_CHECK_RES(res);
+                // move wipes obj_lu, reload it
+                res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+                    0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page),
+                    SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+                SPIFFS_CHECK_RES(res);
+              } else {
+                // page is deleted but not deleted in lookup, scrap it -
+                // might seem unnecessary as we will erase this block, but
+                // we might get aborted
+                SPIFFS_GC_DBG("gc_clean: MOVE_DATA wipe objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix);
+                res = spiffs_page_delete(fs, cur_pix);
+                SPIFFS_CHECK_RES(res);
+                new_data_pix = SPIFFS_OBJ_ID_FREE;
+              }
+              // update memory representation of object index page with new data page
+              if (gc.cur_objix_spix == 0) {
+                // update object index header page
+                ((spiffs_page_ix*)((u8_t *)objix_hdr + sizeof(spiffs_page_object_ix_header)))[p_hdr.span_ix] = new_data_pix;
+                SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page "_SPIPRIpg" to objix_hdr entry "_SPIPRIsp" in mem\n", new_data_pix, (spiffs_span_ix)SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix));
+              } else {
+                // update object index page
+                ((spiffs_page_ix*)((u8_t *)objix + sizeof(spiffs_page_object_ix)))[SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix)] = new_data_pix;
+                SPIFFS_GC_DBG("gc_clean: MOVE_DATA wrote page "_SPIPRIpg" to objix entry "_SPIPRIsp" in mem\n", new_data_pix, (spiffs_span_ix)SPIFFS_OBJ_IX_ENTRY(fs, p_hdr.span_ix));
+              }
+            }
+          }
+          break;
+        case MOVE_OBJ_IX:
+          // find and evacuate object index pages
+          if (obj_id != SPIFFS_OBJ_ID_DELETED && obj_id != SPIFFS_OBJ_ID_FREE &&
+              (obj_id & SPIFFS_OBJ_ID_IX_FLAG)) {
+            // found an index object id
+            spiffs_page_header p_hdr;
+            spiffs_page_ix new_pix;
+            // load header
+            res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+                0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+            SPIFFS_CHECK_RES(res);
+            if (p_hdr.flags & SPIFFS_PH_FLAG_DELET) {
+              // move page
+              res = spiffs_page_move(fs, 0, 0, obj_id, &p_hdr, cur_pix, &new_pix);
+              SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX move objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg" to "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix, new_pix);
+              SPIFFS_CHECK_RES(res);
+              spiffs_cb_object_event(fs, (spiffs_page_object_ix *)&p_hdr,
+                  SPIFFS_EV_IX_MOV, obj_id, p_hdr.span_ix, new_pix, 0);
+              // move wipes obj_lu, reload it
+              res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU | SPIFFS_OP_C_READ,
+                  0, bix * SPIFFS_CFG_LOG_BLOCK_SZ(fs) + SPIFFS_PAGE_TO_PADDR(fs, obj_lookup_page),
+                  SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->lu_work);
+              SPIFFS_CHECK_RES(res);
+            } else {
+              // page is deleted but not deleted in lookup, scrap it -
+              // might seem unnecessary as we will erase this block, but
+              // we might get aborted
+              SPIFFS_GC_DBG("gc_clean: MOVE_OBJIX wipe objix "_SPIPRIid":"_SPIPRIsp" page "_SPIPRIpg"\n", obj_id, p_hdr.span_ix, cur_pix);
+              res = spiffs_page_delete(fs, cur_pix);
+              if (res == SPIFFS_OK) {
+                spiffs_cb_object_event(fs, (spiffs_page_object_ix *)0,
+                    SPIFFS_EV_IX_DEL, obj_id, p_hdr.span_ix, cur_pix, 0);
+              }
+            }
+            SPIFFS_CHECK_RES(res);
+          }
+          break;
+        default:
+          scan = 0;
+          break;
+        } // switch gc state
+        cur_entry++;
+      } // per entry
+      obj_lookup_page++; // no need to check scan variable here, obj_lookup_page is set in start of loop
+    } // per object lookup page
+    if (res != SPIFFS_OK) break;
+
+    // state finalization and switch
+    switch (gc.state) {
+    case FIND_OBJ_DATA:
+      if (gc.obj_id_found) {
+        // handle found data page -
+        // find out corresponding obj ix page and load it to memory
+        spiffs_page_header p_hdr;
+        spiffs_page_ix objix_pix;
+        gc.stored_scan_entry_index = cur_entry; // push cursor
+        cur_entry = 0; // restart scan from start
+        gc.state = MOVE_OBJ_DATA;
+        res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+            0, SPIFFS_PAGE_TO_PADDR(fs, cur_pix), sizeof(spiffs_page_header), (u8_t*)&p_hdr);
+        SPIFFS_CHECK_RES(res);
+        gc.cur_objix_spix = SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, p_hdr.span_ix);
+        SPIFFS_GC_DBG("gc_clean: FIND_DATA find objix span_ix:"_SPIPRIsp"\n", gc.cur_objix_spix);
+        res = spiffs_obj_lu_find_id_and_span(fs, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix, 0, &objix_pix);
+        if (res == SPIFFS_ERR_NOT_FOUND) {
+          // on borked systems we might get an ERR_NOT_FOUND here -
+          // this is handled by simply deleting the page as it is not referenced
+          // from anywhere
+          SPIFFS_GC_DBG("gc_clean: FIND_OBJ_DATA objix not found! Wipe page "_SPIPRIpg"\n", gc.cur_data_pix);
+          res = spiffs_page_delete(fs, gc.cur_data_pix);
+          SPIFFS_CHECK_RES(res);
+          // then we restore states and continue scanning for data pages
+          cur_entry = gc.stored_scan_entry_index; // pop cursor
+          gc.state = FIND_OBJ_DATA;
+          break; // done
+        }
+        SPIFFS_CHECK_RES(res);
+        SPIFFS_GC_DBG("gc_clean: FIND_DATA found object index at page "_SPIPRIpg"\n", objix_pix);
+        res = _spiffs_rd(fs, SPIFFS_OP_T_OBJ_LU2 | SPIFFS_OP_C_READ,
+            0, SPIFFS_PAGE_TO_PADDR(fs, objix_pix), SPIFFS_CFG_LOG_PAGE_SZ(fs), fs->work);
+        SPIFFS_CHECK_RES(res);
+        // cannot allow a gc if the presumed index in fact is no index, a
+        // check must run or lot of data may be lost
+        SPIFFS_VALIDATE_OBJIX(objix->p_hdr, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_spix);
+        gc.cur_objix_pix = objix_pix;
+      } else {
+        // no more data pages found, passed thru all block, start evacuating object indices
+        gc.state = MOVE_OBJ_IX;
+        cur_entry = 0; // restart entry scan index
+      }
+      break;
+    case MOVE_OBJ_DATA: {
+      // store modified objix (hdr) page residing in memory now that all
+      // data pages belonging to this object index and residing in the block
+      // we want to evacuate
+      spiffs_page_ix new_objix_pix;
+      gc.state = FIND_OBJ_DATA;
+      cur_entry = gc.stored_scan_entry_index; // pop cursor
+      if (gc.cur_objix_spix == 0) {
+        // store object index header page
+        res = spiffs_object_update_index_hdr(fs, 0, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, gc.cur_objix_pix, fs->work, 0, 0, 0, &new_objix_pix);
+        SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix_hdr page, "_SPIPRIpg":"_SPIPRIsp"\n", new_objix_pix, 0);
+        SPIFFS_CHECK_RES(res);
+      } else {
+        // store object index page
+        res = spiffs_page_move(fs, 0, fs->work, gc.cur_obj_id | SPIFFS_OBJ_ID_IX_FLAG, 0, gc.cur_objix_pix, &new_objix_pix);
+        SPIFFS_GC_DBG("gc_clean: MOVE_DATA store modified objix page, "_SPIPRIpg":"_SPIPRIsp"\n", new_objix_pix, objix->p_hdr.span_ix);
+        SPIFFS_CHECK_RES(res);
+        spiffs_cb_object_event(fs, (spiffs_page_object_ix *)fs->work,
+            SPIFFS_EV_IX_UPD, gc.cur_obj_id, objix->p_hdr.span_ix, new_objix_pix, 0);
+      }
+    }
+    break;
+    case MOVE_OBJ_IX:
+      // scanned thru all block, no more object indices found - our work here is done
+      gc.state = FINISHED;
+      break;
+    default:
+      cur_entry = 0;
+      break;
+    } // switch gc.state
+    SPIFFS_GC_DBG("gc_clean: state-> "_SPIPRIi"\n", gc.state);
+  } // while state != FINISHED
+
+
+  return res;
+}
+
+#endif // !SPIFFS_READ_ONLY

components/mkspiffs/src/spiffs/spiffs_nucleus.h

@@ -0,0 +1,797 @@
+/*
+ * spiffs_nucleus.h
+ *
+ *  Created on: Jun 15, 2013
+ *      Author: petera
+ */
+
+/* SPIFFS layout
+ *
+ * spiffs is designed for following spi flash characteristics:
+ *   - only big areas of data (blocks) can be erased
+ *   - erasing resets all bits in a block to ones
+ *   - writing pulls ones to zeroes
+ *   - zeroes cannot be pulled to ones, without erase
+ *   - wear leveling
+ *
+ * spiffs is also meant to be run on embedded, memory constraint devices.
+ *
+ * Entire area is divided in blocks. Entire area is also divided in pages.
+ * Each block contains same number of pages. A page cannot be erased, but a
+ * block can be erased.
+ *
+ * Entire area must be block_size * x
+ * page_size must be block_size / (2^y) where y > 2
+ *
+ * ex: area = 1024*1024 bytes, block size = 65536 bytes, page size = 256 bytes
+ *
+ * BLOCK 0  PAGE 0       object lookup 1
+ *          PAGE 1       object lookup 2
+ *          ...
+ *          PAGE n-1     object lookup n
+ *          PAGE n       object data 1
+ *          PAGE n+1     object data 2
+ *          ...
+ *          PAGE n+m-1   object data m
+ *
+ * BLOCK 1  PAGE n+m     object lookup 1
+ *          PAGE n+m+1   object lookup 2
+ *          ...
+ *          PAGE 2n+m-1  object lookup n
+ *          PAGE 2n+m    object data 1
+ *          PAGE 2n+m    object data 2
+ *          ...
+ *          PAGE 2n+2m-1 object data m
+ * ...
+ *
+ * n is number of object lookup pages, which is number of pages needed to index all pages
+ * in a block by object id
+ *   : block_size / page_size * sizeof(obj_id) / page_size
+ * m is number data pages, which is number of pages in block minus number of lookup pages
+ *   : block_size / page_size - block_size / page_size * sizeof(obj_id) / page_size
+ * thus, n+m is total number of pages in a block
+ *   : block_size / page_size
+ *
+ * ex: n = 65536/256*2/256 = 2, m = 65536/256 - 2 = 254 => n+m = 65536/256 = 256
+ *
+ * Object lookup pages contain object id entries. Each entry represent the corresponding
+ * data page.
+ * Assuming a 16 bit object id, an object id being 0xffff represents a free page.
+ * An object id being 0x0000 represents a deleted page.
+ *
+ * ex: page 0 : lookup : 0008 0001 0aaa ffff ffff ffff ffff ffff ..
+ *     page 1 : lookup : ffff ffff ffff ffff ffff ffff ffff ffff ..
+ *     page 2 : data   : data for object id 0008
+ *     page 3 : data   : data for object id 0001
+ *     page 4 : data   : data for object id 0aaa
+ *     ...
+ *
+ *
+ * Object data pages can be either object index pages or object content.
+ * All object data pages contains a data page header, containing object id and span index.
+ * The span index denotes the object page ordering amongst data pages with same object id.
+ * This applies to both object index pages (when index spans more than one page of entries),
+ * and object data pages.
+ * An object index page contains page entries pointing to object content page. The entry index
+ * in a object index page correlates to the span index in the actual object data page.
+ * The first object index page (span index 0) is called object index header page, and also
+ * contains object flags (directory/file), size, object name etc.
+ *
+ * ex:
+ *  BLOCK 1
+ *    PAGE 256: objectl lookup page 1
+ *      [*123] [ 123] [ 123] [ 123]
+ *      [ 123] [*123] [ 123] [ 123]
+ *      [free] [free] [free] [free] ...
+ *    PAGE 257: objectl lookup page 2
+ *      [free] [free] [free] [free] ...
+ *    PAGE 258: object index page (header)
+ *      obj.id:0123 span.ix:0000 flags:INDEX
+ *      size:1600 name:ex.txt type:file
+ *      [259] [260] [261] [262]
+ *    PAGE 259: object data page
+ *      obj.id:0123 span.ix:0000 flags:DATA
+ *    PAGE 260: object data page
+ *      obj.id:0123 span.ix:0001 flags:DATA
+ *    PAGE 261: object data page
+ *      obj.id:0123 span.ix:0002 flags:DATA
+ *    PAGE 262: object data page
+ *      obj.id:0123 span.ix:0003 flags:DATA
+ *    PAGE 263: object index page
+ *      obj.id:0123 span.ix:0001 flags:INDEX
+ *      [264] [265] [fre] [fre]
+ *      [fre] [fre] [fre] [fre]
+ *    PAGE 264: object data page
+ *      obj.id:0123 span.ix:0004 flags:DATA
+ *    PAGE 265: object data page
+ *      obj.id:0123 span.ix:0005 flags:DATA
+ *
+ */
+#ifndef SPIFFS_NUCLEUS_H_
+#define SPIFFS_NUCLEUS_H_
+
+#define _SPIFFS_ERR_CHECK_FIRST         (SPIFFS_ERR_INTERNAL - 1)
+#define SPIFFS_ERR_CHECK_OBJ_ID_MISM    (SPIFFS_ERR_INTERNAL - 1)
+#define SPIFFS_ERR_CHECK_SPIX_MISM      (SPIFFS_ERR_INTERNAL - 2)
+#define SPIFFS_ERR_CHECK_FLAGS_BAD      (SPIFFS_ERR_INTERNAL - 3)
+#define _SPIFFS_ERR_CHECK_LAST          (SPIFFS_ERR_INTERNAL - 4)
+
+// visitor result, continue searching
+#define SPIFFS_VIS_COUNTINUE            (SPIFFS_ERR_INTERNAL - 20)
+// visitor result, continue searching after reloading lu buffer
+#define SPIFFS_VIS_COUNTINUE_RELOAD     (SPIFFS_ERR_INTERNAL - 21)
+// visitor result, stop searching
+#define SPIFFS_VIS_END                  (SPIFFS_ERR_INTERNAL - 22)
+
+// updating an object index contents
+#define SPIFFS_EV_IX_UPD                (0)
+// creating a new object index
+#define SPIFFS_EV_IX_NEW                (1)
+// deleting an object index
+#define SPIFFS_EV_IX_DEL                (2)
+// moving an object index without updating contents
+#define SPIFFS_EV_IX_MOV                (3)
+// updating an object index header data only, not the table itself
+#define SPIFFS_EV_IX_UPD_HDR            (4)
+
+#define SPIFFS_OBJ_ID_IX_FLAG           ((spiffs_obj_id)(1<<(8*sizeof(spiffs_obj_id)-1)))
+
+#define SPIFFS_UNDEFINED_LEN            (u32_t)(-1)
+
+#define SPIFFS_OBJ_ID_DELETED           ((spiffs_obj_id)0)
+#define SPIFFS_OBJ_ID_FREE              ((spiffs_obj_id)-1)
+
+#if SPIFFS_USE_MAGIC
+#if !SPIFFS_USE_MAGIC_LENGTH
+#define SPIFFS_MAGIC(fs, bix)           \
+  ((spiffs_obj_id)(0x20140529 ^ SPIFFS_CFG_LOG_PAGE_SZ(fs)))
+#else // SPIFFS_USE_MAGIC_LENGTH
+#define SPIFFS_MAGIC(fs, bix)           \
+  ((spiffs_obj_id)(0x20140529 ^ SPIFFS_CFG_LOG_PAGE_SZ(fs) ^ ((fs)->block_count - (bix))))
+#endif // SPIFFS_USE_MAGIC_LENGTH
+#endif // SPIFFS_USE_MAGIC
+
+#define SPIFFS_CONFIG_MAGIC             (0x20090315)
+
+#if SPIFFS_SINGLETON == 0
+#define SPIFFS_CFG_LOG_PAGE_SZ(fs) \
+  ((fs)->cfg.log_page_size)
+#define SPIFFS_CFG_LOG_BLOCK_SZ(fs) \
+  ((fs)->cfg.log_block_size)
+#define SPIFFS_CFG_PHYS_SZ(fs) \
+  ((fs)->cfg.phys_size)
+#define SPIFFS_CFG_PHYS_ERASE_SZ(fs) \
+  ((fs)->cfg.phys_erase_block)
+#define SPIFFS_CFG_PHYS_ADDR(fs) \
+  ((fs)->cfg.phys_addr)
+#endif
+
+// total number of pages
+#define SPIFFS_MAX_PAGES(fs) \
+  ( SPIFFS_CFG_PHYS_SZ(fs)/SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// total number of pages per block, including object lookup pages
+#define SPIFFS_PAGES_PER_BLOCK(fs) \
+  ( SPIFFS_CFG_LOG_BLOCK_SZ(fs)/SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// number of object lookup pages per block
+#define SPIFFS_OBJ_LOOKUP_PAGES(fs)     \
+  (MAX(1, (SPIFFS_PAGES_PER_BLOCK(fs) * sizeof(spiffs_obj_id)) / SPIFFS_CFG_LOG_PAGE_SZ(fs)) )
+// checks if page index belongs to object lookup
+#define SPIFFS_IS_LOOKUP_PAGE(fs,pix)     \
+  (((pix) % SPIFFS_PAGES_PER_BLOCK(fs)) < SPIFFS_OBJ_LOOKUP_PAGES(fs))
+// number of object lookup entries in all object lookup pages
+#define SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs) \
+  (SPIFFS_PAGES_PER_BLOCK(fs)-SPIFFS_OBJ_LOOKUP_PAGES(fs))
+// converts a block to physical address
+#define SPIFFS_BLOCK_TO_PADDR(fs, block) \
+  ( SPIFFS_CFG_PHYS_ADDR(fs) + (block)* SPIFFS_CFG_LOG_BLOCK_SZ(fs) )
+// converts a object lookup entry to page index
+#define SPIFFS_OBJ_LOOKUP_ENTRY_TO_PIX(fs, block, entry) \
+  ((block)*SPIFFS_PAGES_PER_BLOCK(fs) + (SPIFFS_OBJ_LOOKUP_PAGES(fs) + entry))
+// converts a object lookup entry to physical address of corresponding page
+#define SPIFFS_OBJ_LOOKUP_ENTRY_TO_PADDR(fs, block, entry) \
+  (SPIFFS_BLOCK_TO_PADDR(fs, block) + (SPIFFS_OBJ_LOOKUP_PAGES(fs) + entry) * SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// converts a page to physical address
+#define SPIFFS_PAGE_TO_PADDR(fs, page) \
+  ( SPIFFS_CFG_PHYS_ADDR(fs) + (page) * SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// converts a physical address to page
+#define SPIFFS_PADDR_TO_PAGE(fs, addr) \
+  ( ((addr) -  SPIFFS_CFG_PHYS_ADDR(fs)) / SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// gives index in page for a physical address
+#define SPIFFS_PADDR_TO_PAGE_OFFSET(fs, addr) \
+  ( ((addr) - SPIFFS_CFG_PHYS_ADDR(fs)) % SPIFFS_CFG_LOG_PAGE_SZ(fs) )
+// returns containing block for given page
+#define SPIFFS_BLOCK_FOR_PAGE(fs, page) \
+  ( (page) / SPIFFS_PAGES_PER_BLOCK(fs) )
+// returns starting page for block
+#define SPIFFS_PAGE_FOR_BLOCK(fs, block) \
+  ( (block) * SPIFFS_PAGES_PER_BLOCK(fs) )
+// converts page to entry in object lookup page
+#define SPIFFS_OBJ_LOOKUP_ENTRY_FOR_PAGE(fs, page) \
+  ( (page) % SPIFFS_PAGES_PER_BLOCK(fs) - SPIFFS_OBJ_LOOKUP_PAGES(fs) )
+// returns data size in a data page
+#define SPIFFS_DATA_PAGE_SIZE(fs) \
+    ( SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_header) )
+// returns physical address for block's erase count,
+// always in the physical last entry of the last object lookup page
+#define SPIFFS_ERASE_COUNT_PADDR(fs, bix) \
+  ( SPIFFS_BLOCK_TO_PADDR(fs, bix) + SPIFFS_OBJ_LOOKUP_PAGES(fs) * SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_obj_id) )
+// returns physical address for block's magic,
+// always in the physical second last entry of the last object lookup page
+#define SPIFFS_MAGIC_PADDR(fs, bix) \
+  ( SPIFFS_BLOCK_TO_PADDR(fs, bix) + SPIFFS_OBJ_LOOKUP_PAGES(fs) * SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_obj_id)*2 )
+// checks if there is any room for magic in the object luts
+#define SPIFFS_CHECK_MAGIC_POSSIBLE(fs) \
+  ( (SPIFFS_OBJ_LOOKUP_MAX_ENTRIES(fs) % (SPIFFS_CFG_LOG_PAGE_SZ(fs)/sizeof(spiffs_obj_id))) * sizeof(spiffs_obj_id) \
+    <= (SPIFFS_CFG_LOG_PAGE_SZ(fs)-sizeof(spiffs_obj_id)*2) )
+
+// define helpers object
+
+// entries in an object header page index
+#define SPIFFS_OBJ_HDR_IX_LEN(fs) \
+  ((SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_object_ix_header))/sizeof(spiffs_page_ix))
+// entries in an object page index
+#define SPIFFS_OBJ_IX_LEN(fs) \
+  ((SPIFFS_CFG_LOG_PAGE_SZ(fs) - sizeof(spiffs_page_object_ix))/sizeof(spiffs_page_ix))
+// object index entry for given data span index
+#define SPIFFS_OBJ_IX_ENTRY(fs, spix) \
+  ((spix) < SPIFFS_OBJ_HDR_IX_LEN(fs) ? (spix) : (((spix)-SPIFFS_OBJ_HDR_IX_LEN(fs))%SPIFFS_OBJ_IX_LEN(fs)))
+// object index span index number for given data span index or entry
+#define SPIFFS_OBJ_IX_ENTRY_SPAN_IX(fs, spix) \
+  ((spix) < SPIFFS_OBJ_HDR_IX_LEN(fs) ? 0 : (1+((spix)-SPIFFS_OBJ_HDR_IX_LEN(fs))/SPIFFS_OBJ_IX_LEN(fs)))
+// get data span index for object index span index
+#define SPIFFS_DATA_SPAN_IX_FOR_OBJ_IX_SPAN_IX(fs, spix) \
+  ( (spix) == 0 ? 0 : (SPIFFS_OBJ_HDR_IX_LEN(fs) + (((spix)-1) * SPIFFS_OBJ_IX_LEN(fs))) )
+
+#define SPIFFS_OP_T_OBJ_LU    (0<<0)
+#define SPIFFS_OP_T_OBJ_LU2   (1<<0)
+#define SPIFFS_OP_T_OBJ_IX    (2<<0)
+#define SPIFFS_OP_T_OBJ_DA    (3<<0)
+#define SPIFFS_OP_C_DELE      (0<<2)
+#define SPIFFS_OP_C_UPDT      (1<<2)
+#define SPIFFS_OP_C_MOVS      (2<<2)
+#define SPIFFS_OP_C_MOVD      (3<<2)
+#define SPIFFS_OP_C_FLSH      (4<<2)
+#define SPIFFS_OP_C_READ      (5<<2)
+#define SPIFFS_OP_C_WRTHRU    (6<<2)
+
+#define SPIFFS_OP_TYPE_MASK (3<<0)
+#define SPIFFS_OP_COM_MASK  (7<<2)
+
+
+// if 0, this page is written to, else clean
+#define SPIFFS_PH_FLAG_USED   (1<<0)
+// if 0, writing is finalized, else under modification
+#define SPIFFS_PH_FLAG_FINAL  (1<<1)
+// if 0, this is an index page, else a data page
+#define SPIFFS_PH_FLAG_INDEX  (1<<2)
+// if 0, page is deleted, else valid
+#define SPIFFS_PH_FLAG_DELET  (1<<7)
+// if 0, this index header is being deleted
+#define SPIFFS_PH_FLAG_IXDELE (1<<6)
+
+
+#define SPIFFS_CHECK_MOUNT(fs) \
+  ((fs)->mounted != 0)
+
+#define SPIFFS_CHECK_CFG(fs) \
+  ((fs)->config_magic == SPIFFS_CONFIG_MAGIC)
+
+#define SPIFFS_CHECK_RES(res) \
+  do { \
+    if ((res) < SPIFFS_OK) return (res); \
+  } while (0);
+
+#define SPIFFS_API_CHECK_MOUNT(fs) \
+  if (!SPIFFS_CHECK_MOUNT((fs))) { \
+    (fs)->err_code = SPIFFS_ERR_NOT_MOUNTED; \
+    return SPIFFS_ERR_NOT_MOUNTED; \
+  }
+
+#define SPIFFS_API_CHECK_CFG(fs) \
+  if (!SPIFFS_CHECK_CFG((fs))) { \
+    (fs)->err_code = SPIFFS_ERR_NOT_CONFIGURED; \
+    return SPIFFS_ERR_NOT_CONFIGURED; \
+  }
+
+#define SPIFFS_API_CHECK_RES(fs, res) \
+  if ((res) < SPIFFS_OK) { \
+    (fs)->err_code = (res); \
+    return (res); \
+  }
+
+#define SPIFFS_API_CHECK_RES_UNLOCK(fs, res) \
+  if ((res) < SPIFFS_OK) { \
+    (fs)->err_code = (res); \
+    SPIFFS_UNLOCK(fs); \
+    return (res); \
+  }
+
+#define SPIFFS_VALIDATE_OBJIX(ph, objid, spix) \
+    if (((ph).flags & SPIFFS_PH_FLAG_USED) != 0) return SPIFFS_ERR_IS_FREE; \
+    if (((ph).flags & SPIFFS_PH_FLAG_DELET) == 0) return SPIFFS_ERR_DELETED; \
+    if (((ph).flags & SPIFFS_PH_FLAG_FINAL) != 0) return SPIFFS_ERR_NOT_FINALIZED; \
+    if (((ph).flags & SPIFFS_PH_FLAG_INDEX) != 0) return SPIFFS_ERR_NOT_INDEX; \
+    if (((objid) & SPIFFS_OBJ_ID_IX_FLAG) == 0) return SPIFFS_ERR_NOT_INDEX; \
+    if ((ph).span_ix != (spix)) return SPIFFS_ERR_INDEX_SPAN_MISMATCH;
+    //if ((spix) == 0 && ((ph).flags & SPIFFS_PH_FLAG_IXDELE) == 0) return SPIFFS_ERR_DELETED;
+
+#define SPIFFS_VALIDATE_DATA(ph, objid, spix) \
+    if (((ph).flags & SPIFFS_PH_FLAG_USED) != 0) return SPIFFS_ERR_IS_FREE; \
+    if (((ph).flags & SPIFFS_PH_FLAG_DELET) == 0) return SPIFFS_ERR_DELETED; \
+    if (((ph).flags & SPIFFS_PH_FLAG_FINAL) != 0) return SPIFFS_ERR_NOT_FINALIZED; \
+    if (((ph).flags & SPIFFS_PH_FLAG_INDEX) == 0) return SPIFFS_ERR_IS_INDEX; \
+    if ((objid) & SPIFFS_OBJ_ID_IX_FLAG) return SPIFFS_ERR_IS_INDEX; \
+    if ((ph).span_ix != (spix)) return SPIFFS_ERR_DATA_SPAN_MISMATCH;
+
+
+// check id, only visit matching objec ids
+#define SPIFFS_VIS_CHECK_ID     (1<<0)
+// report argument object id to visitor - else object lookup id is reported
+#define SPIFFS_VIS_CHECK_PH     (1<<1)
+// stop searching at end of all look up pages
+#define SPIFFS_VIS_NO_WRAP      (1<<2)
+
+#if SPIFFS_HAL_CALLBACK_EXTRA
+
+#define SPIFFS_HAL_WRITE(_fs, _paddr, _len, _src) \
+  (_fs)->cfg.hal_write_f((_fs), (_paddr), (_len), (_src))
+#define SPIFFS_HAL_READ(_fs, _paddr, _len, _dst) \
+  (_fs)->cfg.hal_read_f((_fs), (_paddr), (_len), (_dst))
+#define SPIFFS_HAL_ERASE(_fs, _paddr, _len) \
+  (_fs)->cfg.hal_erase_f((_fs), (_paddr), (_len))
+
+#else // SPIFFS_HAL_CALLBACK_EXTRA
+
+#define SPIFFS_HAL_WRITE(_fs, _paddr, _len, _src) \
+  (_fs)->cfg.hal_write_f((_paddr), (_len), (_src))
+#define SPIFFS_HAL_READ(_fs, _paddr, _len, _dst) \
+  (_fs)->cfg.hal_read_f((_paddr), (_len), (_dst))
+#define SPIFFS_HAL_ERASE(_fs, _paddr, _len) \
+  (_fs)->cfg.hal_erase_f((_paddr), (_len))
+
+#endif // SPIFFS_HAL_CALLBACK_EXTRA
+
+#if SPIFFS_CACHE
+
+#define SPIFFS_CACHE_FLAG_DIRTY       (1<<0)
+#define SPIFFS_CACHE_FLAG_WRTHRU      (1<<1)
+#define SPIFFS_CACHE_FLAG_OBJLU       (1<<2)
+#define SPIFFS_CACHE_FLAG_OBJIX       (1<<3)
+#define SPIFFS_CACHE_FLAG_DATA        (1<<4)
+#define SPIFFS_CACHE_FLAG_TYPE_WR     (1<<7)
+
+#define SPIFFS_CACHE_PAGE_SIZE(fs) \
+  (sizeof(spiffs_cache_page) + SPIFFS_CFG_LOG_PAGE_SZ(fs))
+
+#define spiffs_get_cache(fs) \
+  ((spiffs_cache *)((fs)->cache))
+
+#define spiffs_get_cache_page_hdr(fs, c, ix) \
+  ((spiffs_cache_page *)(&((c)->cpages[(ix) * SPIFFS_CACHE_PAGE_SIZE(fs)])))
+
+#define spiffs_get_cache_page(fs, c, ix) \
+  ((u8_t *)(&((c)->cpages[(ix) * SPIFFS_CACHE_PAGE_SIZE(fs)])) + sizeof(spiffs_cache_page))
+
+// cache page struct
+typedef struct {
+  // cache flags
+  u8_t flags;
+  // cache page index
+  u8_t ix;
+  // last access of this cache page
+  u32_t last_access;
+  union {
+    // type read cache
+    struct {
+      // read cache page index
+      spiffs_page_ix pix;
+    };
+#if SPIFFS_CACHE_WR
+    // type write cache
+    struct {
+      // write cache
+      spiffs_obj_id obj_id;
+      // offset in cache page
+      u32_t offset;
+      // size of cache page
+      u16_t size;
+    };
+#endif
+  };
+} spiffs_cache_page;
+
+// cache struct
+typedef struct {
+  u8_t cpage_count;
+  u32_t last_access;
+  u32_t cpage_use_map;
+  u32_t cpage_use_mask;
+  u8_t *cpages;
+} spiffs_cache;
+
+#endif
+
+
+// spiffs nucleus file descriptor
+typedef struct {
+  // the filesystem of this descriptor
+  spiffs *fs;
+  // number of file descriptor - if 0, the file descriptor is closed
+  spiffs_file file_nbr;
+  // object id - if SPIFFS_OBJ_ID_ERASED, the file was deleted
+  spiffs_obj_id obj_id;
+  // size of the file
+  u32_t size;
+  // cached object index header page index
+  spiffs_page_ix objix_hdr_pix;
+  // cached offset object index page index
+  spiffs_page_ix cursor_objix_pix;
+  // cached offset object index span index
+  spiffs_span_ix cursor_objix_spix;
+  // current absolute offset
+  u32_t offset;
+  // current file descriptor offset
+  u32_t fdoffset;
+  // fd flags
+  spiffs_flags flags;
+#if SPIFFS_CACHE_WR
+  spiffs_cache_page *cache_page;
+#endif
+#if SPIFFS_TEMPORAL_FD_CACHE
+  // djb2 hash of filename
+  u32_t name_hash;
+  // hit score (score == 0 indicates never used fd)
+  u16_t score;
+#endif
+#if SPIFFS_IX_MAP
+  // spiffs index map, if 0 it means unmapped
+  spiffs_ix_map *ix_map;
+#endif
+} spiffs_fd;
+
+
+// object structs
+
+// page header, part of each page except object lookup pages
+// NB: this is always aligned when the data page is an object index,
+// as in this case struct spiffs_page_object_ix is used
+typedef struct __attribute(( packed )) {
+  // object id
+  spiffs_obj_id obj_id;
+  // object span index
+  spiffs_span_ix span_ix;
+  // flags
+  u8_t flags;
+} spiffs_page_header;
+
+// object index header page header
+typedef struct __attribute(( packed ))
+#if SPIFFS_ALIGNED_OBJECT_INDEX_TABLES
+                __attribute(( aligned(sizeof(spiffs_page_ix)) ))
+#endif
+{
+  // common page header
+  spiffs_page_header p_hdr;
+  // alignment
+  u8_t _align[4 - ((sizeof(spiffs_page_header)&3)==0 ? 4 : (sizeof(spiffs_page_header)&3))];
+  // size of object
+  u32_t size;
+  // type of object
+  spiffs_obj_type type;
+  // name of object
+  u8_t name[SPIFFS_OBJ_NAME_LEN];
+#if SPIFFS_OBJ_META_LEN
+  // metadata. not interpreted by SPIFFS in any way.
+  u8_t meta[SPIFFS_OBJ_META_LEN];
+#endif
+} spiffs_page_object_ix_header;
+
+// object index page header
+typedef struct __attribute(( packed )) {
+ spiffs_page_header p_hdr;
+ u8_t _align[4 - ((sizeof(spiffs_page_header)&3)==0 ? 4 : (sizeof(spiffs_page_header)&3))];
+} spiffs_page_object_ix;
+
+// callback func for object lookup visitor
+typedef s32_t (*spiffs_visitor_f)(spiffs *fs, spiffs_obj_id id, spiffs_block_ix bix, int ix_entry,
+    const void *user_const_p, void *user_var_p);
+
+
+#if SPIFFS_CACHE
+#define _spiffs_rd(fs, op, fh, addr, len, dst) \
+    spiffs_phys_rd((fs), (op), (fh), (addr), (len), (dst))
+#define _spiffs_wr(fs, op, fh, addr, len, src) \
+    spiffs_phys_wr((fs), (op), (fh), (addr), (len), (src))
+#else
+#define _spiffs_rd(fs, op, fh, addr, len, dst) \
+    spiffs_phys_rd((fs), (addr), (len), (dst))
+#define _spiffs_wr(fs, op, fh, addr, len, src) \
+    spiffs_phys_wr((fs), (addr), (len), (src))
+#endif
+
+#ifndef MIN
+#define MIN(a,b) ((a) < (b) ? (a) : (b))
+#endif
+#ifndef MAX
+#define MAX(a,b) ((a) > (b) ? (a) : (b))
+#endif
+
+// ---------------
+
+s32_t spiffs_phys_rd(
+    spiffs *fs,
+#if SPIFFS_CACHE
+    u8_t op,
+    spiffs_file fh,
+#endif
+    u32_t addr,
+    u32_t len,
+    u8_t *dst);
+
+s32_t spiffs_phys_wr(
+    spiffs *fs,
+#if SPIFFS_CACHE
+    u8_t op,
+    spiffs_file fh,
+#endif
+    u32_t addr,
+    u32_t len,
+    u8_t *src);
+
+s32_t spiffs_phys_cpy(
+    spiffs *fs,
+    spiffs_file fh,
+    u32_t dst,
+    u32_t src,
+    u32_t len);
+
+s32_t spiffs_phys_count_free_blocks(
+    spiffs *fs);
+
+s32_t spiffs_obj_lu_find_entry_visitor(
+    spiffs *fs,
+    spiffs_block_ix starting_block,
+    int starting_lu_entry,
+    u8_t flags,
+    spiffs_obj_id obj_id,
+    spiffs_visitor_f v,
+    const void *user_const_p,
+    void *user_var_p,
+    spiffs_block_ix *block_ix,
+    int *lu_entry);
+
+s32_t spiffs_erase_block(
+    spiffs *fs,
+    spiffs_block_ix bix);
+
+#if SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH
+s32_t spiffs_probe(
+    spiffs_config *cfg);
+#endif // SPIFFS_USE_MAGIC && SPIFFS_USE_MAGIC_LENGTH
+
+// ---------------
+
+s32_t spiffs_obj_lu_scan(
+    spiffs *fs);
+
+s32_t spiffs_obj_lu_find_free_obj_id(
+    spiffs *fs,
+    spiffs_obj_id *obj_id,
+    const u8_t *conflicting_name);
+
+s32_t spiffs_obj_lu_find_free(
+    spiffs *fs,
+    spiffs_block_ix starting_block,
+    int starting_lu_entry,
+    spiffs_block_ix *block_ix,
+    int *lu_entry);
+
+s32_t spiffs_obj_lu_find_id(
+    spiffs *fs,
+    spiffs_block_ix starting_block,
+    int starting_lu_entry,
+    spiffs_obj_id obj_id,
+    spiffs_block_ix *block_ix,
+    int *lu_entry);
+
+s32_t spiffs_obj_lu_find_id_and_span(
+    spiffs *fs,
+    spiffs_obj_id obj_id,
+    spiffs_span_ix spix,
+    spiffs_page_ix exclusion_pix,
+    spiffs_page_ix *pix);
+
+s32_t spiffs_obj_lu_find_id_and_span_by_phdr(
+    spiffs *fs,
+    spiffs_obj_id obj_id,
+    spiffs_span_ix spix,
+    spiffs_page_ix exclusion_pix,
+    spiffs_page_ix *pix);
+
+// ---------------
+
+s32_t spiffs_page_allocate_data(
+    spiffs *fs,
+    spiffs_obj_id obj_id,
+    spiffs_page_header *ph,
+    u8_t *data,
+    u32_t len,
+    u32_t page_offs,
+    u8_t finalize,
+    spiffs_page_ix *pix);
+
+s32_t spiffs_page_move(
+    spiffs *fs,
+    spiffs_file fh,
+    u8_t *page_data,
+    spiffs_obj_id obj_id,
+    spiffs_page_header *page_hdr,
+    spiffs_page_ix src_pix,
+    spiffs_page_ix *dst_pix);
+
+s32_t spiffs_page_delete(
+    spiffs *fs,
+    spiffs_page_ix pix);
+
+// ---------------
+
+s32_t spiffs_object_create(
+    spiffs *fs,
+    spiffs_obj_id obj_id,
+    const u8_t name[],
+    const u8_t meta[],
+    spiffs_obj_type type,
+    spiffs_page_ix *objix_hdr_pix);
+
+s32_t spiffs_object_update_index_hdr(
+    spiffs *fs,
+    spiffs_fd *fd,
+    spiffs_obj_id obj_id,
+    spiffs_page_ix objix_hdr_pix,
+    u8_t *new_objix_hdr_data,
+    const u8_t name[],
+    const u8_t meta[],
+    u32_t size,
+    spiffs_page_ix *new_pix);
+
+#if SPIFFS_IX_MAP
+
+s32_t spiffs_populate_ix_map(
+    spiffs *fs,
+    spiffs_fd *fd,
+    u32_t vec_entry_start,
+    u32_t vec_entry_end);
+
+#endif
+
+void spiffs_cb_object_event(
+    spiffs *fs,
+    spiffs_page_object_ix *objix,
+    int ev,
+    spiffs_obj_id obj_id,
+    spiffs_span_ix spix,
+    spiffs_page_ix new_pix,
+    u32_t new_size);
+
+s32_t spiffs_object_open_by_id(
+    spiffs *fs,
+    spiffs_obj_id obj_id,
+    spiffs_fd *f,
+    spiffs_flags flags,
+    spiffs_mode mode);
+
+s32_t spiffs_object_open_by_page(
+    spiffs *fs,
+    spiffs_page_ix pix,
+    spiffs_fd *f,
+    spiffs_flags flags,
+    spiffs_mode mode);
+
+s32_t spiffs_object_append(
+    spiffs_fd *fd,
+    u32_t offset,
+    u8_t *data,
+    u32_t len);
+
+s32_t spiffs_object_modify(
+    spiffs_fd *fd,
+    u32_t offset,
+    u8_t *data,
+    u32_t len);
+
+s32_t spiffs_object_read(
+    spiffs_fd *fd,
+    u32_t offset,
+    u32_t len,
+    u8_t *dst);
+
+s32_t spiffs_object_truncate(
+    spiffs_fd *fd,
+    u32_t new_len,
+    u8_t remove_object);
+
+s32_t spiffs_object_find_object_index_header_by_name(
+    spiffs *fs,
+    const u8_t name[SPIFFS_OBJ_NAME_LEN],
+    spiffs_page_ix *pix);
+
+// ---------------
+
+s32_t spiffs_gc_check(
+    spiffs *fs,
+    u32_t len);
+
+s32_t spiffs_gc_erase_page_stats(
+    spiffs *fs,
+    spiffs_block_ix bix);
+
+s32_t spiffs_gc_find_candidate(
+    spiffs *fs,
+    spiffs_block_ix **block_candidate,
+    int *candidate_count,
+    char fs_crammed);
+
+s32_t spiffs_gc_clean(
+    spiffs *fs,
+    spiffs_block_ix bix);
+
+s32_t spiffs_gc_quick(
+    spiffs *fs, u16_t max_free_pages);
+
+// ---------------
+
+s32_t spiffs_fd_find_new(
+    spiffs *fs,
+    spiffs_fd **fd,
+    const char *name);
+
+s32_t spiffs_fd_return(
+    spiffs *fs,
+    spiffs_file f);
+
+s32_t spiffs_fd_get(
+    spiffs *fs,
+    spiffs_file f,
+    spiffs_fd **fd);
+
+#if SPIFFS_TEMPORAL_FD_CACHE
+void spiffs_fd_temporal_cache_rehash(
+    spiffs *fs,
+    const char *old_path,
+    const char *new_path);
+#endif
+
+#if SPIFFS_CACHE
+void spiffs_cache_init(
+    spiffs *fs);
+
+void spiffs_cache_drop_page(
+    spiffs *fs,
+    spiffs_page_ix pix);
+
+#if SPIFFS_CACHE_WR
+spiffs_cache_page *spiffs_cache_page_allocate_by_fd(
+    spiffs *fs,
+    spiffs_fd *fd);
+
+void spiffs_cache_fd_release(
+    spiffs *fs,
+    spiffs_cache_page *cp);
+
+spiffs_cache_page *spiffs_cache_page_get_by_fd(
+    spiffs *fs,
+    spiffs_fd *fd);
+#endif
+#endif
+
+s32_t spiffs_lookup_consistency_check(
+    spiffs *fs,
+    u8_t check_all_objects);
+
+s32_t spiffs_page_consistency_check(
+    spiffs *fs);
+
+s32_t spiffs_object_index_consistency_check(
+    spiffs *fs);
+
+#endif /* SPIFFS_NUCLEUS_H_ */

components/mkspiffs/src/tclap/Arg.h

@@ -0,0 +1,692 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/******************************************************************************
+ *
+ *  file:  Arg.h
+ *
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno .
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ *
+ *****************************************************************************/
+
+
+#ifndef TCLAP_ARGUMENT_H
+#define TCLAP_ARGUMENT_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#else
+#define HAVE_SSTREAM
+#endif
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <iomanip>
+#include <cstdio>
+
+#if defined(HAVE_SSTREAM)
+#include <sstream>
+typedef std::istringstream istringstream;
+#elif defined(HAVE_STRSTREAM)
+#include <strstream>
+typedef std::istrstream istringstream;
+#else
+#error "Need a stringstream (sstream or strstream) to compile!"
+#endif
+
+#include "ArgException.h"
+#include "Visitor.h"
+#include "CmdLineInterface.h"
+#include "ArgTraits.h"
+#include "StandardTraits.h"
+
+namespace TCLAP {
+
+/**
+ * A virtual base class that defines the essential data for all arguments.
+ * This class, or one of its existing children, must be subclassed to do
+ * anything.
+ */
+class Arg
+{
+	private:
+		/**
+		 * Prevent accidental copying.
+		 */
+		Arg(const Arg& rhs);
+
+		/**
+		 * Prevent accidental copying.
+		 */
+		Arg& operator=(const Arg& rhs);
+
+		/**
+		 * Indicates whether the rest of the arguments should be ignored.
+		 */
+		static bool& ignoreRestRef() { static bool ign = false; return ign; }
+
+		/**
+		 * The delimiter that separates an argument flag/name from the
+		 * value.
+		 */
+		static char& delimiterRef() { static char delim = ' '; return delim; }
+
+	protected:
+
+		/**
+		 * The single char flag used to identify the argument.
+		 * This value (preceded by a dash {-}), can be used to identify
+		 * an argument on the command line.  The _flag can be blank,
+		 * in fact this is how unlabeled args work.  Unlabeled args must
+		 * override appropriate functions to get correct handling. Note
+		 * that the _flag does NOT include the dash as part of the flag.
+		 */
+		std::string _flag;
+
+		/**
+		 * A single work namd indentifying the argument.
+		 * This value (preceded by two dashed {--}) can also be used
+		 * to identify an argument on the command line.  Note that the
+		 * _name does NOT include the two dashes as part of the _name. The
+		 * _name cannot be blank.
+		 */
+		std::string _name;
+
+		/**
+		 * Description of the argument.
+		 */
+		std::string _description;
+
+		/**
+		 * Indicating whether the argument is required.
+		 */
+		bool _required;
+
+		/**
+		 * Label to be used in usage description.  Normally set to
+		 * "required", but can be changed when necessary.
+		 */
+		std::string _requireLabel;
+
+		/**
+		 * Indicates whether a value is required for the argument.
+		 * Note that the value may be required but the argument/value
+		 * combination may not be, as specified by _required.
+		 */
+		bool _valueRequired;
+
+		/**
+		 * Indicates whether the argument has been set.
+		 * Indicates that a value on the command line has matched the
+		 * name/flag of this argument and the values have been set accordingly.
+		 */
+		bool _alreadySet;
+
+		/**
+		 * A pointer to a vistitor object.
+		 * The visitor allows special handling to occur as soon as the
+		 * argument is matched.  This defaults to NULL and should not
+		 * be used unless absolutely necessary.
+		 */
+		Visitor* _visitor;
+
+		/**
+		 * Whether this argument can be ignored, if desired.
+		 */
+		bool _ignoreable;
+
+		/**
+		 * Indicates that the arg was set as part of an XOR and not on the
+		 * command line.
+		 */
+		bool _xorSet;
+
+		bool _acceptsMultipleValues;
+
+		/**
+		 * Performs the special handling described by the Vistitor.
+		 */
+		void _checkWithVisitor() const;
+
+		/**
+		 * Primary constructor. YOU (yes you) should NEVER construct an Arg
+		 * directly, this is a base class that is extended by various children
+		 * that are meant to be used.  Use SwitchArg, ValueArg, MultiArg,
+		 * UnlabeledValueArg, or UnlabeledMultiArg instead.
+		 *
+		 * \param flag - The flag identifying the argument.
+		 * \param name - The name identifying the argument.
+		 * \param desc - The description of the argument, used in the usage.
+		 * \param req - Whether the argument is required.
+		 * \param valreq - Whether the a value is required for the argument.
+		 * \param v - The visitor checked by the argument. Defaults to NULL.
+		 */
+ 		Arg( const std::string& flag,
+			 const std::string& name,
+			 const std::string& desc,
+			 bool req,
+			 bool valreq,
+			 Visitor* v = NULL );
+
+	public:
+		/**
+		 * Destructor.
+		 */
+		virtual ~Arg();
+
+		/**
+		 * Adds this to the specified list of Args.
+		 * \param argList - The list to add this to.
+		 */
+		virtual void addToList( std::list<Arg*>& argList ) const;
+
+		/**
+		 * Begin ignoring arguments since the "--" argument was specified.
+		 */
+		static void beginIgnoring() { ignoreRestRef() = true; }
+
+		/**
+		 * Whether to ignore the rest.
+		 */
+		static bool ignoreRest() { return ignoreRestRef(); }
+
+		/**
+		 * The delimiter that separates an argument flag/name from the
+		 * value.
+		 */
+		static char delimiter() { return delimiterRef(); }
+
+		/**
+		 * The char used as a place holder when SwitchArgs are combined.
+		 * Currently set to the bell char (ASCII 7).
+		 */
+		static char blankChar() { return (char)7; }
+
+		/**
+		 * The char that indicates the beginning of a flag.  Defaults to '-', but
+		 * clients can define TCLAP_FLAGSTARTCHAR to override.
+		 */
+#ifndef TCLAP_FLAGSTARTCHAR
+#define TCLAP_FLAGSTARTCHAR '-'
+#endif
+		static char flagStartChar() { return TCLAP_FLAGSTARTCHAR; }
+
+		/**
+		 * The sting that indicates the beginning of a flag.  Defaults to "-", but
+		 * clients can define TCLAP_FLAGSTARTSTRING to override. Should be the same
+		 * as TCLAP_FLAGSTARTCHAR.
+		 */
+#ifndef TCLAP_FLAGSTARTSTRING
+#define TCLAP_FLAGSTARTSTRING "-"
+#endif
+		static const std::string flagStartString() { return TCLAP_FLAGSTARTSTRING; }
+
+		/**
+		 * The sting that indicates the beginning of a name.  Defaults to "--", but
+		 *  clients can define TCLAP_NAMESTARTSTRING to override.
+		 */
+#ifndef TCLAP_NAMESTARTSTRING
+#define TCLAP_NAMESTARTSTRING "--"
+#endif
+		static const std::string nameStartString() { return TCLAP_NAMESTARTSTRING; }
+
+		/**
+		 * The name used to identify the ignore rest argument.
+		 */
+		static const std::string ignoreNameString() { return "ignore_rest"; }
+
+		/**
+		 * Sets the delimiter for all arguments.
+		 * \param c - The character that delimits flags/names from values.
+		 */
+		static void setDelimiter( char c ) { delimiterRef() = c; }
+
+		/**
+		 * Pure virtual method meant to handle the parsing and value assignment
+		 * of the string on the command line.
+		 * \param i - Pointer the the current argument in the list.
+		 * \param args - Mutable list of strings. What is
+		 * passed in from main.
+		 */
+		virtual bool processArg(int *i, std::vector<std::string>& args) = 0;
+
+		/**
+		 * Operator ==.
+		 * Equality operator. Must be virtual to handle unlabeled args.
+		 * \param a - The Arg to be compared to this.
+		 */
+		virtual bool operator==(const Arg& a) const;
+
+		/**
+		 * Returns the argument flag.
+		 */
+		const std::string& getFlag() const;
+
+		/**
+		 * Returns the argument name.
+		 */
+		const std::string& getName() const;
+
+		/**
+		 * Returns the argument description.
+		 */
+		std::string getDescription() const;
+
+		/**
+		 * Indicates whether the argument is required.
+		 */
+		virtual bool isRequired() const;
+
+		/**
+		 * Sets _required to true. This is used by the XorHandler.
+		 * You really have no reason to ever use it.
+		 */
+		void forceRequired();
+
+		/**
+		 * Sets the _alreadySet value to true.  This is used by the XorHandler.
+		 * You really have no reason to ever use it.
+		 */
+		void xorSet();
+
+		/**
+		 * Indicates whether a value must be specified for argument.
+		 */
+		bool isValueRequired() const;
+
+		/**
+		 * Indicates whether the argument has already been set.  Only true
+		 * if the arg has been matched on the command line.
+		 */
+		bool isSet() const;
+
+		/**
+		 * Indicates whether the argument can be ignored, if desired.
+		 */
+		bool isIgnoreable() const;
+
+		/**
+		 * A method that tests whether a string matches this argument.
+		 * This is generally called by the processArg() method.  This
+		 * method could be re-implemented by a child to change how
+		 * arguments are specified on the command line.
+		 * \param s - The string to be compared to the flag/name to determine
+		 * whether the arg matches.
+		 */
+		virtual bool argMatches( const std::string& s ) const;
+
+		/**
+		 * Returns a simple string representation of the argument.
+		 * Primarily for debugging.
+		 */
+		virtual std::string toString() const;
+
+		/**
+		 * Returns a short ID for the usage.
+		 * \param valueId - The value used in the id.
+		 */
+		virtual std::string shortID( const std::string& valueId = "val" ) const;
+
+		/**
+		 * Returns a long ID for the usage.
+		 * \param valueId - The value used in the id.
+		 */
+		virtual std::string longID( const std::string& valueId = "val" ) const;
+
+		/**
+		 * Trims a value off of the flag.
+		 * \param flag - The string from which the flag and value will be
+		 * trimmed. Contains the flag once the value has been trimmed.
+		 * \param value - Where the value trimmed from the string will
+		 * be stored.
+		 */
+		virtual void trimFlag( std::string& flag, std::string& value ) const;
+
+		/**
+		 * Checks whether a given string has blank chars, indicating that
+		 * it is a combined SwitchArg.  If so, return true, otherwise return
+		 * false.
+		 * \param s - string to be checked.
+		 */
+		bool _hasBlanks( const std::string& s ) const;
+
+		/**
+		 * Sets the requireLabel. Used by XorHandler.  You shouldn't ever
+		 * use this.
+		 * \param s - Set the requireLabel to this value.
+		 */
+		void setRequireLabel( const std::string& s );
+
+		/**
+		 * Used for MultiArgs and XorHandler to determine whether args
+		 * can still be set.
+		 */
+		virtual bool allowMore();
+
+		/**
+		 * Use by output classes to determine whether an Arg accepts
+		 * multiple values.
+		 */
+		virtual bool acceptsMultipleValues();
+
+		/**
+		 * Clears the Arg object and allows it to be reused by new
+		 * command lines.
+		 */
+		 virtual void reset();
+};
+
+/**
+ * Typedef of an Arg list iterator.
+ */
+typedef std::list<Arg*>::iterator ArgListIterator;
+
+/**
+ * Typedef of an Arg vector iterator.
+ */
+typedef std::vector<Arg*>::iterator ArgVectorIterator;
+
+/**
+ * Typedef of a Visitor list iterator.
+ */
+typedef std::list<Visitor*>::iterator VisitorListIterator;
+
+/*
+ * Extract a value of type T from it's string representation contained
+ * in strVal. The ValueLike parameter used to select the correct
+ * specialization of ExtractValue depending on the value traits of T.
+ * ValueLike traits use operator>> to assign the value from strVal.
+ */
+template<typename T> void
+ExtractValue(T &destVal, const std::string& strVal, ValueLike vl)
+{
+    static_cast<void>(vl); // Avoid warning about unused vl
+    std::istringstream is(strVal);
+
+    int valuesRead = 0;
+    while ( is.good() ) {
+	if ( is.peek() != EOF )
+#ifdef TCLAP_SETBASE_ZERO
+	    is >> std::setbase(0) >> destVal;
+#else
+	    is >> destVal;
+#endif
+	else
+	    break;
+
+	valuesRead++;
+    }
+
+    if ( is.fail() )
+	throw( ArgParseException("Couldn't read argument value "
+				 "from string '" + strVal + "'"));
+
+
+    if ( valuesRead > 1 )
+	throw( ArgParseException("More than one valid value parsed from "
+				 "string '" + strVal + "'"));
+
+}
+
+/*
+ * Extract a value of type T from it's string representation contained
+ * in strVal. The ValueLike parameter used to select the correct
+ * specialization of ExtractValue depending on the value traits of T.
+ * StringLike uses assignment (operator=) to assign from strVal.
+ */
+template<typename T> void
+ExtractValue(T &destVal, const std::string& strVal, StringLike sl)
+{
+    static_cast<void>(sl); // Avoid warning about unused sl
+    SetString(destVal, strVal);
+}
+
+//////////////////////////////////////////////////////////////////////
+//BEGIN Arg.cpp
+//////////////////////////////////////////////////////////////////////
+
+inline Arg::Arg(const std::string& flag,
+         const std::string& name,
+         const std::string& desc,
+         bool req,
+         bool valreq,
+         Visitor* v) :
+  _flag(flag),
+  _name(name),
+  _description(desc),
+  _required(req),
+  _requireLabel("required"),
+  _valueRequired(valreq),
+  _alreadySet(false),
+  _visitor( v ),
+  _ignoreable(true),
+  _xorSet(false),
+  _acceptsMultipleValues(false)
+{
+	if ( _flag.length() > 1 )
+		throw(SpecificationException(
+				"Argument flag can only be one character long", toString() ) );
+
+	if ( _name != ignoreNameString() &&
+		 ( _flag == Arg::flagStartString() ||
+		   _flag == Arg::nameStartString() ||
+		   _flag == " " ) )
+		throw(SpecificationException("Argument flag cannot be either '" +
+							Arg::flagStartString() + "' or '" +
+							Arg::nameStartString() + "' or a space.",
+							toString() ) );
+
+	if ( ( _name.substr( 0, Arg::flagStartString().length() ) == Arg::flagStartString() ) ||
+		 ( _name.substr( 0, Arg::nameStartString().length() ) == Arg::nameStartString() ) ||
+		 ( _name.find( " ", 0 ) != std::string::npos ) )
+		throw(SpecificationException("Argument name begin with either '" +
+							Arg::flagStartString() + "' or '" +
+							Arg::nameStartString() + "' or space.",
+							toString() ) );
+
+}
+
+inline Arg::~Arg() { }
+
+inline std::string Arg::shortID( const std::string& valueId ) const
+{
+	std::string id = "";
+
+	if ( _flag != "" )
+		id = Arg::flagStartString() + _flag;
+	else
+		id = Arg::nameStartString() + _name;
+
+	if ( _valueRequired )
+		id += std::string( 1, Arg::delimiter() ) + "<" + valueId  + ">";
+
+	if ( !_required )
+		id = "[" + id + "]";
+
+	return id;
+}
+
+inline std::string Arg::longID( const std::string& valueId ) const
+{
+	std::string id = "";
+
+	if ( _flag != "" )
+	{
+		id += Arg::flagStartString() + _flag;
+
+		if ( _valueRequired )
+			id += std::string( 1, Arg::delimiter() ) + "<" + valueId + ">";
+
+		id += ",  ";
+	}
+
+	id += Arg::nameStartString() + _name;
+
+	if ( _valueRequired )
+		id += std::string( 1, Arg::delimiter() ) + "<" + valueId + ">";
+
+	return id;
+
+}
+
+inline bool Arg::operator==(const Arg& a) const
+{
+	if ( ( _flag != "" && _flag == a._flag ) || _name == a._name)
+		return true;
+	else
+		return false;
+}
+
+inline std::string Arg::getDescription() const
+{
+	std::string desc = "";
+	if ( _required )
+		desc = "(" + _requireLabel + ")  ";
+
+//	if ( _valueRequired )
+//		desc += "(value required)  ";
+
+	desc += _description;
+	return desc;
+}
+
+inline const std::string& Arg::getFlag() const { return _flag; }
+
+inline const std::string& Arg::getName() const { return _name; }
+
+inline bool Arg::isRequired() const { return _required; }
+
+inline bool Arg::isValueRequired() const { return _valueRequired; }
+
+inline bool Arg::isSet() const
+{
+	if ( _alreadySet && !_xorSet )
+		return true;
+	else
+		return false;
+}
+
+inline bool Arg::isIgnoreable() const { return _ignoreable; }
+
+inline void Arg::setRequireLabel( const std::string& s)
+{
+	_requireLabel = s;
+}
+
+inline bool Arg::argMatches( const std::string& argFlag ) const
+{
+	if ( ( argFlag == Arg::flagStartString() + _flag && _flag != "" ) ||
+	       argFlag == Arg::nameStartString() + _name )
+		return true;
+	else
+		return false;
+}
+
+inline std::string Arg::toString() const
+{
+	std::string s = "";
+
+	if ( _flag != "" )
+		s += Arg::flagStartString() + _flag + " ";
+
+	s += "(" + Arg::nameStartString() + _name + ")";
+
+	return s;
+}
+
+inline void Arg::_checkWithVisitor() const
+{
+	if ( _visitor != NULL )
+		_visitor->visit();
+}
+
+/**
+ * Implementation of trimFlag.
+ */
+inline void Arg::trimFlag(std::string& flag, std::string& value) const
+{
+	int stop = 0;
+	for ( int i = 0; static_cast<unsigned int>(i) < flag.length(); i++ )
+		if ( flag[i] == Arg::delimiter() )
+		{
+			stop = i;
+			break;
+		}
+
+	if ( stop > 1 )
+	{
+		value = flag.substr(stop+1);
+		flag = flag.substr(0,stop);
+	}
+
+}
+
+/**
+ * Implementation of _hasBlanks.
+ */
+inline bool Arg::_hasBlanks( const std::string& s ) const
+{
+	for ( int i = 1; static_cast<unsigned int>(i) < s.length(); i++ )
+		if ( s[i] == Arg::blankChar() )
+			return true;
+
+	return false;
+}
+
+inline void Arg::forceRequired()
+{
+	_required = true;
+}
+
+inline void Arg::xorSet()
+{
+	_alreadySet = true;
+	_xorSet = true;
+}
+
+/**
+ * Overridden by Args that need to added to the end of the list.
+ */
+inline void Arg::addToList( std::list<Arg*>& argList ) const
+{
+	argList.push_front( const_cast<Arg*>(this) );
+}
+
+inline bool Arg::allowMore()
+{
+	return false;
+}
+
+inline bool Arg::acceptsMultipleValues()
+{
+	return _acceptsMultipleValues;
+}
+
+inline void Arg::reset()
+{
+	_xorSet = false;
+	_alreadySet = false;
+}
+
+//////////////////////////////////////////////////////////////////////
+//END Arg.cpp
+//////////////////////////////////////////////////////////////////////
+
+} //namespace TCLAP
+
+#endif
+

components/mkspiffs/src/tclap/ArgException.h

@@ -0,0 +1,200 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/****************************************************************************** 
+ * 
+ *  file:  ArgException.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_ARG_EXCEPTION_H
+#define TCLAP_ARG_EXCEPTION_H
+
+#include <string>
+#include <exception>
+
+namespace TCLAP {
+
+/**
+ * A simple class that defines and argument exception.  Should be caught
+ * whenever a CmdLine is created and parsed.
+ */
+class ArgException : public std::exception
+{
+	public:
+	
+		/**
+		 * Constructor.
+		 * \param text - The text of the exception.
+		 * \param id - The text identifying the argument source.
+		 * \param td - Text describing the type of ArgException it is.
+		 * of the exception.
+		 */
+		ArgException( const std::string& text = "undefined exception", 
+					  const std::string& id = "undefined",
+					  const std::string& td = "Generic ArgException")
+			: std::exception(), 
+			  _errorText(text), 
+			  _argId( id ), 
+			  _typeDescription(td)
+		{ } 
+		
+		/**
+		 * Destructor.
+		 */
+		virtual ~ArgException() throw() { }
+
+		/**
+		 * Returns the error text.
+		 */
+		std::string error() const { return ( _errorText ); }
+
+		/**
+		 * Returns the argument id.
+		 */
+		std::string argId() const  
+		{ 
+			if ( _argId == "undefined" )
+				return " ";
+			else
+				return ( "Argument: " + _argId ); 
+		}
+
+		/**
+		 * Returns the arg id and error text. 
+		 */
+		const char* what() const throw() 
+		{
+			static std::string ex; 
+			ex = _argId + " -- " + _errorText;
+			return ex.c_str();
+		}
+
+		/**
+		 * Returns the type of the exception.  Used to explain and distinguish
+		 * between different child exceptions.
+		 */
+		std::string typeDescription() const
+		{
+			return _typeDescription; 
+		}
+
+
+	private:
+
+		/**
+		 * The text of the exception message.
+		 */
+		std::string _errorText;
+
+		/**
+		 * The argument related to this exception.
+		 */
+		std::string _argId;
+
+		/**
+		 * Describes the type of the exception.  Used to distinguish
+		 * between different child exceptions.
+		 */
+		std::string _typeDescription;
+
+};
+
+/**
+ * Thrown from within the child Arg classes when it fails to properly
+ * parse the argument it has been passed.
+ */
+class ArgParseException : public ArgException
+{ 
+	public:
+		/**
+		 * Constructor.
+		 * \param text - The text of the exception.
+		 * \param id - The text identifying the argument source 
+		 * of the exception.
+		 */
+		ArgParseException( const std::string& text = "undefined exception", 
+					       const std::string& id = "undefined" )
+			: ArgException( text, 
+			                id, 
+							std::string( "Exception found while parsing " ) + 
+							std::string( "the value the Arg has been passed." ))
+			{ }
+};
+
+/**
+ * Thrown from CmdLine when the arguments on the command line are not
+ * properly specified, e.g. too many arguments, required argument missing, etc.
+ */
+class CmdLineParseException : public ArgException
+{
+	public:
+		/**
+		 * Constructor.
+		 * \param text - The text of the exception.
+		 * \param id - The text identifying the argument source 
+		 * of the exception.
+		 */
+		CmdLineParseException( const std::string& text = "undefined exception", 
+					           const std::string& id = "undefined" )
+			: ArgException( text, 
+			                id,
+							std::string( "Exception found when the values ") +
+							std::string( "on the command line do not meet ") +
+							std::string( "the requirements of the defined ") +
+							std::string( "Args." ))
+		{ }
+};
+
+/**
+ * Thrown from Arg and CmdLine when an Arg is improperly specified, e.g. 
+ * same flag as another Arg, same name, etc.
+ */
+class SpecificationException : public ArgException
+{
+	public:
+		/**
+		 * Constructor.
+		 * \param text - The text of the exception.
+		 * \param id - The text identifying the argument source 
+		 * of the exception.
+		 */
+		SpecificationException( const std::string& text = "undefined exception",
+					            const std::string& id = "undefined" )
+			: ArgException( text, 
+			                id,
+							std::string("Exception found when an Arg object ")+
+							std::string("is improperly defined by the ") +
+							std::string("developer." )) 
+		{ }
+
+};
+
+class ExitException {
+public:
+	ExitException(int estat) : _estat(estat) {}
+
+	int getExitStatus() const { return _estat; }
+
+private:
+	int _estat;
+};
+
+} // namespace TCLAP
+
+#endif
+

components/mkspiffs/src/tclap/ArgTraits.h

@@ -0,0 +1,87 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/******************************************************************************
+ *
+ *  file:  ArgTraits.h
+ *
+ *  Copyright (c) 2007, Daniel Aarno, Michael E. Smoot .
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ *
+ *****************************************************************************/
+
+// This is an internal tclap file, you should probably not have to
+// include this directly
+
+#ifndef TCLAP_ARGTRAITS_H
+#define TCLAP_ARGTRAITS_H
+
+namespace TCLAP {
+
+// We use two empty structs to get compile type specialization
+// function to work
+
+/**
+ * A value like argument value type is a value that can be set using
+ * operator>>. This is the default value type.
+ */
+struct ValueLike {
+    typedef ValueLike ValueCategory;
+	virtual ~ValueLike() {}
+};
+
+/**
+ * A string like argument value type is a value that can be set using
+ * operator=(string). Usefull if the value type contains spaces which
+ * will be broken up into individual tokens by operator>>.
+ */
+struct StringLike {
+	virtual ~StringLike() {}
+};
+
+/**
+ * A class can inherit from this object to make it have string like
+ * traits. This is a compile time thing and does not add any overhead
+ * to the inherenting class.
+ */
+struct StringLikeTrait {
+    typedef StringLike ValueCategory;
+	virtual ~StringLikeTrait() {}
+};
+
+/**
+ * A class can inherit from this object to make it have value like
+ * traits. This is a compile time thing and does not add any overhead
+ * to the inherenting class.
+ */
+struct ValueLikeTrait {
+    typedef ValueLike ValueCategory;
+	virtual ~ValueLikeTrait() {}
+};
+
+/**
+ * Arg traits are used to get compile type specialization when parsing
+ * argument values. Using an ArgTraits you can specify the way that
+ * values gets assigned to any particular type during parsing. The two
+ * supported types are StringLike and ValueLike.
+ */
+template<typename T>
+struct ArgTraits {
+    typedef typename T::ValueCategory ValueCategory;
+	virtual ~ArgTraits() {}
+    //typedef ValueLike ValueCategory;
+};
+
+#endif
+
+} // namespace

components/mkspiffs/src/tclap/COPYING

@@ -0,0 +1,25 @@
+
+
+Copyright (c) 2003 Michael E. Smoot 
+
+Permission is hereby granted, free of charge, to any person 
+obtaining a copy of this software and associated documentation 
+files (the "Software"), to deal in the Software without restriction, 
+including without limitation the rights to use, copy, modify, merge, 
+publish, distribute, sublicense, and/or sell copies of the Software, 
+and to permit persons to whom the Software is furnished to do so, 
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be 
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 
+BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR 
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 
+THE SOFTWARE.
+
+

components/mkspiffs/src/tclap/CmdLine.h

@@ -0,0 +1,633 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/******************************************************************************
+ *
+ *  file:  CmdLine.h
+ *
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ *
+ *****************************************************************************/
+
+#ifndef TCLAP_CMDLINE_H
+#define TCLAP_CMDLINE_H
+
+#include "SwitchArg.h"
+#include "MultiSwitchArg.h"
+#include "UnlabeledValueArg.h"
+#include "UnlabeledMultiArg.h"
+
+#include "XorHandler.h"
+#include "HelpVisitor.h"
+#include "VersionVisitor.h"
+#include "IgnoreRestVisitor.h"
+
+#include "CmdLineOutput.h"
+#include "StdOutput.h"
+
+#include "Constraint.h"
+#include "ValuesConstraint.h"
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+#include <stdlib.h> // Needed for exit(), which isn't defined in some envs.
+
+namespace TCLAP {
+
+template<typename T> void DelPtr(T ptr)
+{
+	delete ptr;
+}
+
+template<typename C> void ClearContainer(C &c)
+{
+	typedef typename C::value_type value_type;
+	std::for_each(c.begin(), c.end(), DelPtr<value_type>);
+	c.clear();
+}
+
+
+/**
+ * The base class that manages the command line definition and passes
+ * along the parsing to the appropriate Arg classes.
+ */
+class CmdLine : public CmdLineInterface
+{
+	protected:
+
+		/**
+		 * The list of arguments that will be tested against the
+		 * command line.
+		 */
+		std::list<Arg*> _argList;
+
+		/**
+		 * The name of the program.  Set to argv[0].
+		 */
+		std::string _progName;
+
+		/**
+		 * A message used to describe the program.  Used in the usage output.
+		 */
+		std::string _message;
+
+		/**
+		 * The version to be displayed with the --version switch.
+		 */
+		std::string _version;
+
+		/**
+		 * The number of arguments that are required to be present on
+		 * the command line. This is set dynamically, based on the
+		 * Args added to the CmdLine object.
+		 */
+		int _numRequired;
+
+		/**
+		 * The character that is used to separate the argument flag/name
+		 * from the value.  Defaults to ' ' (space).
+		 */
+		char _delimiter;
+
+		/**
+		 * The handler that manages xoring lists of args.
+		 */
+		XorHandler _xorHandler;
+
+		/**
+		 * A list of Args to be explicitly deleted when the destructor
+		 * is called.  At the moment, this only includes the three default
+		 * Args.
+		 */
+		std::list<Arg*> _argDeleteOnExitList;
+
+		/**
+		 * A list of Visitors to be explicitly deleted when the destructor
+		 * is called.  At the moment, these are the Vistors created for the
+		 * default Args.
+		 */
+		std::list<Visitor*> _visitorDeleteOnExitList;
+
+		/**
+		 * Object that handles all output for the CmdLine.
+		 */
+		CmdLineOutput* _output;
+
+		/**
+		 * Should CmdLine handle parsing exceptions internally?
+		 */
+		bool _handleExceptions;
+
+		/**
+		 * Throws an exception listing the missing args.
+		 */
+		void missingArgsException();
+
+		/**
+		 * Checks whether a name/flag string matches entirely matches
+		 * the Arg::blankChar.  Used when multiple switches are combined
+		 * into a single argument.
+		 * \param s - The message to be used in the usage.
+		 */
+		bool _emptyCombined(const std::string& s);
+
+		/**
+		 * Perform a delete ptr; operation on ptr when this object is deleted.
+		 */
+		void deleteOnExit(Arg* ptr);
+
+		/**
+		 * Perform a delete ptr; operation on ptr when this object is deleted.
+		 */
+		void deleteOnExit(Visitor* ptr);
+
+private:
+
+		/**
+		 * Prevent accidental copying.
+		 */
+		CmdLine(const CmdLine& rhs);
+		CmdLine& operator=(const CmdLine& rhs);
+
+		/**
+		 * Encapsulates the code common to the constructors
+		 * (which is all of it).
+		 */
+		void _constructor();
+
+
+		/**
+		 * Is set to true when a user sets the output object. We use this so
+		 * that we don't delete objects that are created outside of this lib.
+		 */
+		bool _userSetOutput;
+
+		/**
+		 * Whether or not to automatically create help and version switches.
+		 */
+		bool _helpAndVersion;
+
+	public:
+
+		/**
+		 * Command line constructor. Defines how the arguments will be
+		 * parsed.
+		 * \param message - The message to be used in the usage
+		 * output.
+		 * \param delimiter - The character that is used to separate
+		 * the argument flag/name from the value.  Defaults to ' ' (space).
+		 * \param version - The version number to be used in the
+		 * --version switch.
+		 * \param helpAndVersion - Whether or not to create the Help and
+		 * Version switches. Defaults to true.
+		 */
+		CmdLine(const std::string& message,
+				const char delimiter = ' ',
+				const std::string& version = "none",
+				bool helpAndVersion = true);
+
+		/**
+		 * Deletes any resources allocated by a CmdLine object.
+		 */
+		virtual ~CmdLine();
+
+		/**
+		 * Adds an argument to the list of arguments to be parsed.
+		 * \param a - Argument to be added.
+		 */
+		void add( Arg& a );
+
+		/**
+		 * An alternative add.  Functionally identical.
+		 * \param a - Argument to be added.
+		 */
+		void add( Arg* a );
+
+		/**
+		 * Add two Args that will be xor'd.  If this method is used, add does
+		 * not need to be called.
+		 * \param a - Argument to be added and xor'd.
+		 * \param b - Argument to be added and xor'd.
+		 */
+		void xorAdd( Arg& a, Arg& b );
+
+		/**
+		 * Add a list of Args that will be xor'd.  If this method is used,
+		 * add does not need to be called.
+		 * \param xors - List of Args to be added and xor'd.
+		 */
+		void xorAdd( std::vector<Arg*>& xors );
+
+		/**
+		 * Parses the command line.
+		 * \param argc - Number of arguments.
+		 * \param argv - Array of arguments.
+		 */
+		void parse(int argc, const char * const * argv);
+
+		/**
+		 * Parses the command line.
+		 * \param args - A vector of strings representing the args.
+		 * args[0] is still the program name.
+		 */
+		void parse(std::vector<std::string>& args);
+
+		/**
+		 *
+		 */
+		CmdLineOutput* getOutput();
+
+		/**
+		 *
+		 */
+		void setOutput(CmdLineOutput* co);
+
+		/**
+		 *
+		 */
+		std::string& getVersion();
+
+		/**
+		 *
+		 */
+		std::string& getProgramName();
+
+		/**
+		 *
+		 */
+		std::list<Arg*>& getArgList();
+
+		/**
+		 *
+		 */
+		XorHandler& getXorHandler();
+
+		/**
+		 *
+		 */
+		char getDelimiter();
+
+		/**
+		 *
+		 */
+		std::string& getMessage();
+
+		/**
+		 *
+		 */
+		bool hasHelpAndVersion();
+
+		/**
+		 * Disables or enables CmdLine's internal parsing exception handling.
+		 *
+		 * @param state Should CmdLine handle parsing exceptions internally?
+		 */
+		void setExceptionHandling(const bool state);
+
+		/**
+		 * Returns the current state of the internal exception handling.
+		 *
+		 * @retval true Parsing exceptions are handled internally.
+		 * @retval false Parsing exceptions are propagated to the caller.
+		 */
+		bool getExceptionHandling() const;
+
+		/**
+		 * Allows the CmdLine object to be reused.
+		 */
+		void reset();
+
+};
+
+
+///////////////////////////////////////////////////////////////////////////////
+//Begin CmdLine.cpp
+///////////////////////////////////////////////////////////////////////////////
+
+inline CmdLine::CmdLine(const std::string& m,
+                        char delim,
+                        const std::string& v,
+                        bool help )
+    :
+  _argList(std::list<Arg*>()),
+  _progName("not_set_yet"),
+  _message(m),
+  _version(v),
+  _numRequired(0),
+  _delimiter(delim),
+  _xorHandler(XorHandler()),
+  _argDeleteOnExitList(std::list<Arg*>()),
+  _visitorDeleteOnExitList(std::list<Visitor*>()),
+  _output(0),
+  _handleExceptions(true),
+  _userSetOutput(false),
+  _helpAndVersion(help)
+{
+	_constructor();
+}
+
+inline CmdLine::~CmdLine()
+{
+	ClearContainer(_argDeleteOnExitList);
+	ClearContainer(_visitorDeleteOnExitList);
+
+	if ( !_userSetOutput ) {
+		delete _output;
+		_output = 0;
+	}
+}
+
+inline void CmdLine::_constructor()
+{
+	_output = new StdOutput;
+
+	Arg::setDelimiter( _delimiter );
+
+	Visitor* v;
+
+	if ( _helpAndVersion )
+	{
+		v = new HelpVisitor( this, &_output );
+		SwitchArg* help = new SwitchArg("h","help",
+		                      "Displays usage information and exits.",
+		                      false, v);
+		add( help );
+		deleteOnExit(help);
+		deleteOnExit(v);
+
+		v = new VersionVisitor( this, &_output );
+		SwitchArg* vers = new SwitchArg("","version",
+		                      "Displays version information and exits.",
+		                      false, v);
+		add( vers );
+		deleteOnExit(vers);
+		deleteOnExit(v);
+	}
+
+	v = new IgnoreRestVisitor();
+	SwitchArg* ignore  = new SwitchArg(Arg::flagStartString(),
+	          Arg::ignoreNameString(),
+	          "Ignores the rest of the labeled arguments following this flag.",
+	          false, v);
+	add( ignore );
+	deleteOnExit(ignore);
+	deleteOnExit(v);
+}
+
+inline void CmdLine::xorAdd( std::vector<Arg*>& ors )
+{
+	_xorHandler.add( ors );
+
+	for (ArgVectorIterator it = ors.begin(); it != ors.end(); it++)
+	{
+		(*it)->forceRequired();
+		(*it)->setRequireLabel( "OR required" );
+		add( *it );
+	}
+}
+
+inline void CmdLine::xorAdd( Arg& a, Arg& b )
+{
+	std::vector<Arg*> ors;
+	ors.push_back( &a );
+	ors.push_back( &b );
+	xorAdd( ors );
+}
+
+inline void CmdLine::add( Arg& a )
+{
+	add( &a );
+}
+
+inline void CmdLine::add( Arg* a )
+{
+	for( ArgListIterator it = _argList.begin(); it != _argList.end(); it++ )
+		if ( *a == *(*it) )
+			throw( SpecificationException(
+			        "Argument with same flag/name already exists!",
+			        a->longID() ) );
+
+	a->addToList( _argList );
+
+	if ( a->isRequired() )
+		_numRequired++;
+}
+
+
+inline void CmdLine::parse(int argc, const char * const * argv)
+{
+		// this step is necessary so that we have easy access to
+		// mutable strings.
+		std::vector<std::string> args;
+		for (int i = 0; i < argc; i++)
+			args.push_back(argv[i]);
+
+		parse(args);
+}
+
+inline void CmdLine::parse(std::vector<std::string>& args)
+{
+	bool shouldExit = false;
+	int estat = 0;
+
+	try {
+		_progName = args.front();
+		args.erase(args.begin());
+
+		int requiredCount = 0;
+
+		for (int i = 0; static_cast<unsigned int>(i) < args.size(); i++) 
+		{
+			bool matched = false;
+			for (ArgListIterator it = _argList.begin();
+			     it != _argList.end(); it++) {
+				if ( (*it)->processArg( &i, args ) )
+				{
+					requiredCount += _xorHandler.check( *it );
+					matched = true;
+					break;
+				}
+			}
+
+			// checks to see if the argument is an empty combined
+			// switch and if so, then we've actually matched it
+			if ( !matched && _emptyCombined( args[i] ) )
+				matched = true;
+
+			if ( !matched && !Arg::ignoreRest() )
+				throw(CmdLineParseException("Couldn't find match "
+				                            "for argument",
+				                            args[i]));
+		}
+
+		if ( requiredCount < _numRequired )
+			missingArgsException();
+
+		if ( requiredCount > _numRequired )
+			throw(CmdLineParseException("Too many arguments!"));
+
+	} catch ( ArgException& e ) {
+		// If we're not handling the exceptions, rethrow.
+		if ( !_handleExceptions) {
+			throw;
+		}
+
+		try {
+			_output->failure(*this,e);
+		} catch ( ExitException &ee ) {
+			estat = ee.getExitStatus();
+			shouldExit = true;
+		}
+	} catch (ExitException &ee) {
+		// If we're not handling the exceptions, rethrow.
+		if ( !_handleExceptions) {
+			throw;
+		}
+
+		estat = ee.getExitStatus();
+		shouldExit = true;
+	}
+
+	if (shouldExit)
+		exit(estat);
+}
+
+inline bool CmdLine::_emptyCombined(const std::string& s)
+{
+	if ( s.length() > 0 && s[0] != Arg::flagStartChar() )
+		return false;
+
+	for ( int i = 1; static_cast<unsigned int>(i) < s.length(); i++ )
+		if ( s[i] != Arg::blankChar() )
+			return false;
+
+	return true;
+}
+
+inline void CmdLine::missingArgsException()
+{
+		int count = 0;
+
+		std::string missingArgList;
+		for (ArgListIterator it = _argList.begin(); it != _argList.end(); it++)
+		{
+			if ( (*it)->isRequired() && !(*it)->isSet() )
+			{
+				missingArgList += (*it)->getName();
+				missingArgList += ", ";
+				count++;
+			}
+		}
+		missingArgList = missingArgList.substr(0,missingArgList.length()-2);
+
+		std::string msg;
+		if ( count > 1 )
+			msg = "Required arguments missing: ";
+		else
+			msg = "Required argument missing: ";
+
+		msg += missingArgList;
+
+		throw(CmdLineParseException(msg));
+}
+
+inline void CmdLine::deleteOnExit(Arg* ptr)
+{
+	_argDeleteOnExitList.push_back(ptr);
+}
+
+inline void CmdLine::deleteOnExit(Visitor* ptr)
+{
+	_visitorDeleteOnExitList.push_back(ptr);
+}
+
+inline CmdLineOutput* CmdLine::getOutput()
+{
+	return _output;
+}
+
+inline void CmdLine::setOutput(CmdLineOutput* co)
+{
+	if ( !_userSetOutput )
+		delete _output;
+	_userSetOutput = true;
+	_output = co;
+}
+
+inline std::string& CmdLine::getVersion()
+{
+	return _version;
+}
+
+inline std::string& CmdLine::getProgramName()
+{
+	return _progName;
+}
+
+inline std::list<Arg*>& CmdLine::getArgList()
+{
+	return _argList;
+}
+
+inline XorHandler& CmdLine::getXorHandler()
+{
+	return _xorHandler;
+}
+
+inline char CmdLine::getDelimiter()
+{
+	return _delimiter;
+}
+
+inline std::string& CmdLine::getMessage()
+{
+	return _message;
+}
+
+inline bool CmdLine::hasHelpAndVersion()
+{
+	return _helpAndVersion;
+}
+
+inline void CmdLine::setExceptionHandling(const bool state)
+{
+	_handleExceptions = state;
+}
+
+inline bool CmdLine::getExceptionHandling() const
+{
+	return _handleExceptions;
+}
+
+inline void CmdLine::reset()
+{
+	for( ArgListIterator it = _argList.begin(); it != _argList.end(); it++ )
+		(*it)->reset();
+	
+	_progName.clear();
+}
+
+///////////////////////////////////////////////////////////////////////////////
+//End CmdLine.cpp
+///////////////////////////////////////////////////////////////////////////////
+
+
+
+} //namespace TCLAP
+#endif

components/mkspiffs/src/tclap/CmdLineInterface.h

@@ -0,0 +1,150 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  CmdLineInterface.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_COMMANDLINE_INTERFACE_H
+#define TCLAP_COMMANDLINE_INTERFACE_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <algorithm>
+
+
+namespace TCLAP {
+     
+class Arg;
+class CmdLineOutput;
+class XorHandler;
+
+/**
+ * The base class that manages the command line definition and passes
+ * along the parsing to the appropriate Arg classes.
+ */
+class CmdLineInterface
+{
+	public:
+
+		/**
+		 * Destructor
+		 */
+		virtual ~CmdLineInterface() {}
+
+		/**
+		 * Adds an argument to the list of arguments to be parsed.
+		 * \param a - Argument to be added. 
+		 */
+		virtual void add( Arg& a )=0;
+
+		/**
+		 * An alternative add.  Functionally identical.
+		 * \param a - Argument to be added. 
+		 */
+		virtual void add( Arg* a )=0;
+
+		/**
+		 * Add two Args that will be xor'd.  
+		 * If this method is used, add does
+		 * not need to be called.
+		 * \param a - Argument to be added and xor'd. 
+		 * \param b - Argument to be added and xor'd. 
+		 */
+		virtual void xorAdd( Arg& a, Arg& b )=0;
+
+		/**
+		 * Add a list of Args that will be xor'd.  If this method is used, 
+		 * add does not need to be called.
+		 * \param xors - List of Args to be added and xor'd. 
+		 */
+		virtual void xorAdd( std::vector<Arg*>& xors )=0;
+
+		/**
+		 * Parses the command line.
+		 * \param argc - Number of arguments.
+		 * \param argv - Array of arguments.
+		 */
+		virtual void parse(int argc, const char * const * argv)=0;
+
+        /**
+         * Parses the command line.
+         * \param args - A vector of strings representing the args. 
+         * args[0] is still the program name.
+         */
+        void parse(std::vector<std::string>& args);
+
+		/**
+		 * Returns the CmdLineOutput object.
+		 */
+		virtual CmdLineOutput* getOutput()=0;
+
+		/**
+		 * \param co - CmdLineOutput object that we want to use instead. 
+		 */
+		virtual void setOutput(CmdLineOutput* co)=0;
+
+		/**
+		 * Returns the version string.
+		 */
+		virtual std::string& getVersion()=0;
+
+		/**
+		 * Returns the program name string.
+		 */
+		virtual std::string& getProgramName()=0;
+
+		/**
+		 * Returns the argList. 
+		 */
+		virtual std::list<Arg*>& getArgList()=0;
+
+		/**
+		 * Returns the XorHandler. 
+		 */
+		virtual XorHandler& getXorHandler()=0;
+
+		/**
+		 * Returns the delimiter string.
+		 */
+		virtual char getDelimiter()=0;
+
+		/**
+		 * Returns the message string.
+		 */
+		virtual std::string& getMessage()=0;
+
+		/**
+		 * Indicates whether or not the help and version switches were created
+		 * automatically.
+		 */
+		virtual bool hasHelpAndVersion()=0;
+
+		/** 
+		 * Resets the instance as if it had just been constructed so that the
+		 * instance can be reused. 
+		 */
+		virtual void reset()=0;
+};
+
+} //namespace
+
+
+#endif 

components/mkspiffs/src/tclap/CmdLineOutput.h

@@ -0,0 +1,74 @@
+
+
+/****************************************************************************** 
+ * 
+ *  file:  CmdLineOutput.h
+ * 
+ *  Copyright (c) 2004, Michael E. Smoot
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_CMDLINEOUTPUT_H
+#define TCLAP_CMDLINEOUTPUT_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+
+namespace TCLAP {
+
+class CmdLineInterface;
+class ArgException;
+
+/**
+ * The interface that any output object must implement.
+ */
+class CmdLineOutput 
+{
+
+	public:
+
+		/**
+		 * Virtual destructor.
+		 */
+		virtual ~CmdLineOutput() {}
+
+		/**
+		 * Generates some sort of output for the USAGE. 
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void usage(CmdLineInterface& c)=0;
+
+		/**
+		 * Generates some sort of output for the version. 
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void version(CmdLineInterface& c)=0;
+
+		/**
+		 * Generates some sort of output for a failure. 
+		 * \param c - The CmdLine object the output is generated for. 
+		 * \param e - The ArgException that caused the failure. 
+		 */
+		virtual void failure( CmdLineInterface& c, 
+						      ArgException& e )=0;
+
+};
+
+} //namespace TCLAP
+#endif 

components/mkspiffs/src/tclap/Constraint.h

@@ -0,0 +1,68 @@
+
+/******************************************************************************
+ *
+ *  file:  Constraint.h
+ *
+ *  Copyright (c) 2005, Michael E. Smoot
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ *
+ *****************************************************************************/
+
+#ifndef TCLAP_CONSTRAINT_H
+#define TCLAP_CONSTRAINT_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <iomanip>
+#include <algorithm>
+
+namespace TCLAP {
+
+/**
+ * The interface that defines the interaction between the Arg and Constraint.
+ */
+template<class T>
+class Constraint
+{
+
+	public:
+		/**
+		 * Returns a description of the Constraint.
+		 */
+		virtual std::string description() const =0;
+
+		/**
+		 * Returns the short ID for the Constraint.
+		 */
+		virtual std::string shortID() const =0;
+
+		/**
+		 * The method used to verify that the value parsed from the command
+		 * line meets the constraint.
+		 * \param value - The value that will be checked.
+		 */
+		virtual bool check(const T& value) const =0;
+
+		/**
+		 * Destructor.
+		 * Silences warnings about Constraint being a base class with virtual
+		 * functions but without a virtual destructor.
+		 */
+		virtual ~Constraint() { ; }
+};
+
+} //namespace TCLAP
+#endif

components/mkspiffs/src/tclap/DocBookOutput.h

@@ -0,0 +1,299 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/****************************************************************************** 
+ * 
+ *  file:  DocBookOutput.h
+ * 
+ *  Copyright (c) 2004, Michael E. Smoot
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_DOCBOOKOUTPUT_H
+#define TCLAP_DOCBOOKOUTPUT_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <algorithm>
+
+#include "CmdLineInterface.h"
+#include "CmdLineOutput.h"
+#include "XorHandler.h"
+#include "Arg.h"
+
+namespace TCLAP {
+
+/**
+ * A class that generates DocBook output for usage() method for the 
+ * given CmdLine and its Args.
+ */
+class DocBookOutput : public CmdLineOutput
+{
+
+	public:
+
+		/**
+		 * Prints the usage to stdout.  Can be overridden to 
+		 * produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void usage(CmdLineInterface& c);
+
+		/**
+		 * Prints the version to stdout. Can be overridden 
+		 * to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void version(CmdLineInterface& c);
+
+		/**
+		 * Prints (to stderr) an error message, short usage 
+		 * Can be overridden to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 * \param e - The ArgException that caused the failure. 
+		 */
+		virtual void failure(CmdLineInterface& c, 
+						     ArgException& e );
+
+	protected:
+
+		/**
+		 * Substitutes the char r for string x in string s.
+		 * \param s - The string to operate on. 
+		 * \param r - The char to replace. 
+		 * \param x - What to replace r with. 
+		 */
+		void substituteSpecialChars( std::string& s, char r, std::string& x );
+		void removeChar( std::string& s, char r);
+		void basename( std::string& s );
+
+		void printShortArg(Arg* it);
+		void printLongArg(Arg* it);
+
+		char theDelimiter;
+};
+
+
+inline void DocBookOutput::version(CmdLineInterface& _cmd) 
+{ 
+	std::cout << _cmd.getVersion() << std::endl;
+}
+
+inline void DocBookOutput::usage(CmdLineInterface& _cmd ) 
+{
+	std::list<Arg*> argList = _cmd.getArgList();
+	std::string progName = _cmd.getProgramName();
+	std::string xversion = _cmd.getVersion();
+	theDelimiter = _cmd.getDelimiter();
+	XorHandler xorHandler = _cmd.getXorHandler();
+	std::vector< std::vector<Arg*> > xorList = xorHandler.getXorList();
+	basename(progName);
+
+	std::cout << "<?xml version='1.0'?>" << std::endl;
+	std::cout << "<!DOCTYPE refentry PUBLIC \"-//OASIS//DTD DocBook XML V4.2//EN\"" << std::endl;
+	std::cout << "\t\"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd\">" << std::endl << std::endl;
+
+	std::cout << "<refentry>" << std::endl;
+
+	std::cout << "<refmeta>" << std::endl;
+	std::cout << "<refentrytitle>" << progName << "</refentrytitle>" << std::endl;
+	std::cout << "<manvolnum>1</manvolnum>" << std::endl;
+	std::cout << "</refmeta>" << std::endl;
+
+	std::cout << "<refnamediv>" << std::endl;
+	std::cout << "<refname>" << progName << "</refname>" << std::endl;
+	std::cout << "<refpurpose>" << _cmd.getMessage() << "</refpurpose>" << std::endl;
+	std::cout << "</refnamediv>" << std::endl;
+
+	std::cout << "<refsynopsisdiv>" << std::endl;
+	std::cout << "<cmdsynopsis>" << std::endl;
+
+	std::cout << "<command>" << progName << "</command>" << std::endl;
+
+	// xor
+	for ( int i = 0; (unsigned int)i < xorList.size(); i++ )
+	{
+		std::cout << "<group choice='req'>" << std::endl;
+		for ( ArgVectorIterator it = xorList[i].begin(); 
+						it != xorList[i].end(); it++ )
+			printShortArg((*it));
+
+		std::cout << "</group>" << std::endl;
+	}
+	
+	// rest of args
+	for (ArgListIterator it = argList.begin(); it != argList.end(); it++)
+		if ( !xorHandler.contains( (*it) ) )
+			printShortArg((*it));
+
+ 	std::cout << "</cmdsynopsis>" << std::endl;
+	std::cout << "</refsynopsisdiv>" << std::endl;
+
+	std::cout << "<refsect1>" << std::endl;
+	std::cout << "<title>Description</title>" << std::endl;
+	std::cout << "<para>" << std::endl;
+	std::cout << _cmd.getMessage() << std::endl; 
+	std::cout << "</para>" << std::endl;
+	std::cout << "</refsect1>" << std::endl;
+
+	std::cout << "<refsect1>" << std::endl;
+	std::cout << "<title>Options</title>" << std::endl;
+
+	std::cout << "<variablelist>" << std::endl;
+	
+	for (ArgListIterator it = argList.begin(); it != argList.end(); it++)
+		printLongArg((*it));
+
+	std::cout << "</variablelist>" << std::endl;
+	std::cout << "</refsect1>" << std::endl;
+
+	std::cout << "<refsect1>" << std::endl;
+	std::cout << "<title>Version</title>" << std::endl;
+	std::cout << "<para>" << std::endl;
+	std::cout << xversion << std::endl; 
+	std::cout << "</para>" << std::endl;
+	std::cout << "</refsect1>" << std::endl;
+	
+	std::cout << "</refentry>" << std::endl;
+
+}
+
+inline void DocBookOutput::failure( CmdLineInterface& _cmd,
+				    ArgException& e ) 
+{ 
+	static_cast<void>(_cmd); // unused
+	std::cout << e.what() << std::endl;
+	throw ExitException(1);
+}
+
+inline void DocBookOutput::substituteSpecialChars( std::string& s,
+				                                   char r,
+												   std::string& x )
+{
+	size_t p;
+	while ( (p = s.find_first_of(r)) != std::string::npos )
+	{
+		s.erase(p,1);
+		s.insert(p,x);
+	}
+}
+
+inline void DocBookOutput::removeChar( std::string& s, char r)
+{
+	size_t p;
+	while ( (p = s.find_first_of(r)) != std::string::npos )
+	{
+		s.erase(p,1);
+	}
+}
+
+inline void DocBookOutput::basename( std::string& s )
+{
+	size_t p = s.find_last_of('/');
+	if ( p != std::string::npos )
+	{
+		s.erase(0, p + 1);
+	}
+}
+
+inline void DocBookOutput::printShortArg(Arg* a)
+{
+	std::string lt = "&lt;"; 
+	std::string gt = "&gt;"; 
+
+	std::string id = a->shortID();
+	substituteSpecialChars(id,'<',lt);
+	substituteSpecialChars(id,'>',gt);
+	removeChar(id,'[');
+	removeChar(id,']');
+	
+	std::string choice = "opt";
+	if ( a->isRequired() )
+		choice = "plain";
+
+	std::cout << "<arg choice='" << choice << '\'';
+	if ( a->acceptsMultipleValues() )
+		std::cout << " rep='repeat'";
+
+
+	std::cout << '>';
+	if ( !a->getFlag().empty() )
+		std::cout << a->flagStartChar() << a->getFlag();
+	else
+		std::cout << a->nameStartString() << a->getName();
+	if ( a->isValueRequired() )
+	{
+		std::string arg = a->shortID();
+		removeChar(arg,'[');
+		removeChar(arg,']');
+		removeChar(arg,'<');
+		removeChar(arg,'>');
+		arg.erase(0, arg.find_last_of(theDelimiter) + 1);
+		std::cout << theDelimiter;
+		std::cout << "<replaceable>" << arg << "</replaceable>";
+	}
+	std::cout << "</arg>" << std::endl;
+
+}
+
+inline void DocBookOutput::printLongArg(Arg* a)
+{
+	std::string lt = "&lt;"; 
+	std::string gt = "&gt;"; 
+
+	std::string desc = a->getDescription();
+	substituteSpecialChars(desc,'<',lt);
+	substituteSpecialChars(desc,'>',gt);
+
+	std::cout << "<varlistentry>" << std::endl;
+
+	if ( !a->getFlag().empty() )
+	{
+		std::cout << "<term>" << std::endl;
+		std::cout << "<option>";
+		std::cout << a->flagStartChar() << a->getFlag();
+		std::cout << "</option>" << std::endl;
+		std::cout << "</term>" << std::endl;
+	}
+
+	std::cout << "<term>" << std::endl;
+	std::cout << "<option>";
+	std::cout << a->nameStartString() << a->getName();
+	if ( a->isValueRequired() )
+	{
+		std::string arg = a->shortID();
+		removeChar(arg,'[');
+		removeChar(arg,']');
+		removeChar(arg,'<');
+		removeChar(arg,'>');
+		arg.erase(0, arg.find_last_of(theDelimiter) + 1);
+		std::cout << theDelimiter;
+		std::cout << "<replaceable>" << arg << "</replaceable>";
+	}
+	std::cout << "</option>" << std::endl;
+	std::cout << "</term>" << std::endl;
+
+	std::cout << "<listitem>" << std::endl;
+	std::cout << "<para>" << std::endl;
+	std::cout << desc << std::endl;
+	std::cout << "</para>" << std::endl;
+	std::cout << "</listitem>" << std::endl;
+
+	std::cout << "</varlistentry>" << std::endl;
+}
+
+} //namespace TCLAP
+#endif 

components/mkspiffs/src/tclap/HelpVisitor.h

@@ -0,0 +1,76 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  HelpVisitor.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_HELP_VISITOR_H
+#define TCLAP_HELP_VISITOR_H
+
+#include "CmdLineInterface.h"
+#include "CmdLineOutput.h"
+#include "Visitor.h"
+
+namespace TCLAP {
+
+/**
+ * A Visitor object that calls the usage method of the given CmdLineOutput
+ * object for the specified CmdLine object.
+ */
+class HelpVisitor: public Visitor
+{
+	private:
+		/**
+		 * Prevent accidental copying.
+		 */
+		HelpVisitor(const HelpVisitor& rhs);
+		HelpVisitor& operator=(const HelpVisitor& rhs);
+
+	protected:
+
+		/**
+		 * The CmdLine the output will be generated for. 
+		 */
+		CmdLineInterface* _cmd;
+
+		/**
+		 * The output object. 
+		 */
+		CmdLineOutput** _out;
+
+	public:
+
+		/**
+		 * Constructor.
+		 * \param cmd - The CmdLine the output will be generated for.
+		 * \param out - The type of output. 
+		 */
+		HelpVisitor(CmdLineInterface* cmd, CmdLineOutput** out) 
+				: Visitor(), _cmd( cmd ), _out( out ) { }
+
+		/**
+		 * Calls the usage method of the CmdLineOutput for the 
+		 * specified CmdLine.
+		 */
+		void visit() { (*_out)->usage(*_cmd); throw ExitException(0); }
+		
+};
+
+}
+
+#endif

components/mkspiffs/src/tclap/IgnoreRestVisitor.h

@@ -0,0 +1,52 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  IgnoreRestVisitor.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_IGNORE_REST_VISITOR_H
+#define TCLAP_IGNORE_REST_VISITOR_H
+
+#include "Visitor.h"
+#include "Arg.h"
+
+namespace TCLAP {
+
+/**
+ * A Vistor that tells the CmdLine to begin ignoring arguments after
+ * this one is parsed.
+ */
+class IgnoreRestVisitor: public Visitor
+{
+	public:
+
+		/**
+		 * Constructor.
+		 */
+		IgnoreRestVisitor() : Visitor() {}
+
+		/**
+		 * Sets Arg::_ignoreRest.
+		 */
+		void visit() { Arg::beginIgnoring();  }
+};
+
+}
+
+#endif

components/mkspiffs/src/tclap/MultiArg.h

@@ -0,0 +1,433 @@
+/****************************************************************************** 
+ * 
+ *  file:  MultiArg.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/
+
+
+#ifndef TCLAP_MULTIPLE_ARGUMENT_H
+#define TCLAP_MULTIPLE_ARGUMENT_H
+
+#include <string>
+#include <vector>
+
+#include "Arg.h"
+#include "Constraint.h"
+
+namespace TCLAP {
+/**
+ * An argument that allows multiple values of type T to be specified.  Very
+ * similar to a ValueArg, except a vector of values will be returned
+ * instead of just one.
+ */
+template<class T>
+class MultiArg : public Arg
+{
+public:
+	typedef std::vector<T> container_type;	
+	typedef typename container_type::iterator iterator;
+	typedef typename container_type::const_iterator const_iterator;
+
+protected:
+
+	/**
+	 * The list of values parsed from the CmdLine.
+	 */
+	std::vector<T> _values;
+
+	/**
+	 * The description of type T to be used in the usage.
+	 */
+	std::string _typeDesc;
+
+	/**
+	 * A list of constraint on this Arg. 
+	 */
+	Constraint<T>* _constraint;
+
+	/**
+	 * Extracts the value from the string.
+	 * Attempts to parse string as type T, if this fails an exception
+	 * is thrown.
+	 * \param val - The string to be read.
+	 */
+	void _extractValue( const std::string& val );
+
+	/**
+	 * Used by XorHandler to decide whether to keep parsing for this arg.
+	 */
+	bool _allowMore;
+
+public:
+
+	/**
+	 * Constructor.
+	 * \param flag - The one character flag that identifies this
+	 * argument on the command line.
+	 * \param name - A one word name for the argument.  Can be
+	 * used as a long flag on the command line.
+	 * \param desc - A description of what the argument is for or
+	 * does.
+	 * \param req - Whether the argument is required on the command
+	 * line.
+	 * \param typeDesc - A short, human readable description of the
+	 * type that this object expects.  This is used in the generation
+	 * of the USAGE statement.  The goal is to be helpful to the end user
+	 * of the program.
+	 * \param v - An optional visitor.  You probably should not
+	 * use this unless you have a very good reason.
+	 */
+	MultiArg( const std::string& flag,
+                  const std::string& name,
+                  const std::string& desc,
+                  bool req,
+                  const std::string& typeDesc,
+                  Visitor* v = NULL);
+
+	/**
+	 * Constructor.
+	 * \param flag - The one character flag that identifies this
+	 * argument on the command line.
+	 * \param name - A one word name for the argument.  Can be
+	 * used as a long flag on the command line.
+	 * \param desc - A description of what the argument is for or
+	 * does.
+	 * \param req - Whether the argument is required on the command
+	 * line.
+	 * \param typeDesc - A short, human readable description of the
+	 * type that this object expects.  This is used in the generation
+	 * of the USAGE statement.  The goal is to be helpful to the end user
+	 * of the program.
+	 * \param parser - A CmdLine parser object to add this Arg to
+	 * \param v - An optional visitor.  You probably should not
+	 * use this unless you have a very good reason.
+	 */
+	MultiArg( const std::string& flag, 
+                  const std::string& name,
+                  const std::string& desc,
+                  bool req,
+                  const std::string& typeDesc,
+                  CmdLineInterface& parser,
+                  Visitor* v = NULL );
+
+	/**
+	 * Constructor.
+	 * \param flag - The one character flag that identifies this
+	 * argument on the command line.
+	 * \param name - A one word name for the argument.  Can be
+	 * used as a long flag on the command line.
+	 * \param desc - A description of what the argument is for or
+	 * does.
+	 * \param req - Whether the argument is required on the command
+	 * line.
+	 * \param constraint - A pointer to a Constraint object used
+	 * to constrain this Arg.
+	 * \param v - An optional visitor.  You probably should not
+	 * use this unless you have a very good reason.
+	 */
+	MultiArg( const std::string& flag,
+                  const std::string& name,
+                  const std::string& desc,
+                  bool req,
+                  Constraint<T>* constraint,
+                  Visitor* v = NULL );
+		  
+	/**
+	 * Constructor.
+	 * \param flag - The one character flag that identifies this
+	 * argument on the command line.
+	 * \param name - A one word name for the argument.  Can be
+	 * used as a long flag on the command line.
+	 * \param desc - A description of what the argument is for or
+	 * does.
+	 * \param req - Whether the argument is required on the command
+	 * line.
+	 * \param constraint - A pointer to a Constraint object used
+	 * to constrain this Arg.
+	 * \param parser - A CmdLine parser object to add this Arg to
+	 * \param v - An optional visitor.  You probably should not
+	 * use this unless you have a very good reason.
+	 */
+	MultiArg( const std::string& flag, 
+                  const std::string& name,
+                  const std::string& desc,
+                  bool req,
+                  Constraint<T>* constraint,
+                  CmdLineInterface& parser,
+                  Visitor* v = NULL );
+		  
+	/**
+	 * Handles the processing of the argument.
+	 * This re-implements the Arg version of this method to set the
+	 * _value of the argument appropriately.  It knows the difference
+	 * between labeled and unlabeled.
+	 * \param i - Pointer the the current argument in the list.
+	 * \param args - Mutable list of strings. Passed from main().
+	 */
+	virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+	/**
+	 * Returns a vector of type T containing the values parsed from
+	 * the command line.
+	 */
+	const std::vector<T>& getValue();
+
+	/**
+	 * Returns an iterator over the values parsed from the command
+	 * line.
+	 */
+	const_iterator begin() const { return _values.begin(); }
+
+	/**
+	 * Returns the end of the values parsed from the command
+	 * line.
+	 */
+	const_iterator end() const { return _values.end(); }
+
+	/**
+	 * Returns the a short id string.  Used in the usage. 
+	 * \param val - value to be used.
+	 */
+	virtual std::string shortID(const std::string& val="val") const;
+
+	/**
+	 * Returns the a long id string.  Used in the usage. 
+	 * \param val - value to be used.
+	 */
+	virtual std::string longID(const std::string& val="val") const;
+
+	/**
+	 * Once we've matched the first value, then the arg is no longer
+	 * required.
+	 */
+	virtual bool isRequired() const;
+
+	virtual bool allowMore();
+	
+	virtual void reset();
+
+private:
+	/**
+	 * Prevent accidental copying
+	 */
+	MultiArg<T>(const MultiArg<T>& rhs);
+	MultiArg<T>& operator=(const MultiArg<T>& rhs);
+
+};
+
+template<class T>
+MultiArg<T>::MultiArg(const std::string& flag, 
+                      const std::string& name,
+                      const std::string& desc,
+                      bool req,
+                      const std::string& typeDesc,
+                      Visitor* v) :
+   Arg( flag, name, desc, req, true, v ),
+  _values(std::vector<T>()),
+  _typeDesc( typeDesc ),
+  _constraint( NULL ),
+  _allowMore(false)
+{ 
+	_acceptsMultipleValues = true;
+}
+
+template<class T>
+MultiArg<T>::MultiArg(const std::string& flag, 
+                      const std::string& name,
+                      const std::string& desc,
+                      bool req,
+                      const std::string& typeDesc,
+                      CmdLineInterface& parser,
+                      Visitor* v)
+: Arg( flag, name, desc, req, true, v ),
+  _values(std::vector<T>()),
+  _typeDesc( typeDesc ),
+  _constraint( NULL ),
+  _allowMore(false)
+{ 
+	parser.add( this );
+	_acceptsMultipleValues = true;
+}
+
+/**
+ *
+ */
+template<class T>
+MultiArg<T>::MultiArg(const std::string& flag, 
+                      const std::string& name,
+                      const std::string& desc,
+                      bool req,
+                      Constraint<T>* constraint,
+                      Visitor* v)
+: Arg( flag, name, desc, req, true, v ),
+  _values(std::vector<T>()),
+  _typeDesc( constraint->shortID() ),
+  _constraint( constraint ),
+  _allowMore(false)
+{ 
+	_acceptsMultipleValues = true;
+}
+
+template<class T>
+MultiArg<T>::MultiArg(const std::string& flag, 
+                      const std::string& name,
+                      const std::string& desc,
+                      bool req,
+                      Constraint<T>* constraint,
+                      CmdLineInterface& parser,
+                      Visitor* v)
+: Arg( flag, name, desc, req, true, v ),
+  _values(std::vector<T>()),
+  _typeDesc( constraint->shortID() ),
+  _constraint( constraint ),
+  _allowMore(false)
+{ 
+	parser.add( this );
+	_acceptsMultipleValues = true;
+}
+
+template<class T>
+const std::vector<T>& MultiArg<T>::getValue() { return _values; }
+
+template<class T>
+bool MultiArg<T>::processArg(int *i, std::vector<std::string>& args) 
+{
+ 	if ( _ignoreable && Arg::ignoreRest() )
+		return false;
+
+	if ( _hasBlanks( args[*i] ) )
+		return false;
+
+	std::string flag = args[*i];
+	std::string value = "";
+
+   	trimFlag( flag, value );
+
+   	if ( argMatches( flag ) )
+   	{
+   		if ( Arg::delimiter() != ' ' && value == "" )
+			throw( ArgParseException( 
+			           "Couldn't find delimiter for this argument!",
+					   toString() ) );
+
+		// always take the first one, regardless of start string
+		if ( value == "" )
+		{
+			(*i)++;
+			if ( static_cast<unsigned int>(*i) < args.size() )
+				_extractValue( args[*i] );
+			else
+				throw( ArgParseException("Missing a value for this argument!",
+                                         toString() ) );
+		} 
+		else
+			_extractValue( value );
+
+		/*
+		// continuing taking the args until we hit one with a start string 
+		while ( (unsigned int)(*i)+1 < args.size() &&
+				args[(*i)+1].find_first_of( Arg::flagStartString() ) != 0 &&
+		        args[(*i)+1].find_first_of( Arg::nameStartString() ) != 0 ) 
+				_extractValue( args[++(*i)] );
+		*/
+
+		_alreadySet = true;
+		_checkWithVisitor();
+
+		return true;
+	}
+	else
+		return false;
+}
+
+/**
+ *
+ */
+template<class T>
+std::string MultiArg<T>::shortID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return Arg::shortID(_typeDesc) + " ... ";
+}
+
+/**
+ *
+ */
+template<class T>
+std::string MultiArg<T>::longID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return Arg::longID(_typeDesc) + "  (accepted multiple times)";
+}
+
+/**
+ * Once we've matched the first value, then the arg is no longer
+ * required.
+ */
+template<class T>
+bool MultiArg<T>::isRequired() const
+{
+	if ( _required )
+	{
+		if ( _values.size() > 1 )
+			return false;
+		else
+			return true;
+   	}
+   	else
+		return false;
+
+}
+
+template<class T>
+void MultiArg<T>::_extractValue( const std::string& val ) 
+{
+    try {
+	T tmp;
+	ExtractValue(tmp, val, typename ArgTraits<T>::ValueCategory());
+	_values.push_back(tmp);
+    } catch( ArgParseException &e) {
+	throw ArgParseException(e.error(), toString());
+    }
+
+    if ( _constraint != NULL )
+	if ( ! _constraint->check( _values.back() ) )
+	    throw( CmdLineParseException( "Value '" + val +
+					  "' does not meet constraint: " +
+					  _constraint->description(), 
+					  toString() ) );
+}
+		
+template<class T>
+bool MultiArg<T>::allowMore()
+{
+	bool am = _allowMore;
+	_allowMore = true;
+	return am;
+}
+
+template<class T>
+void MultiArg<T>::reset()
+{
+	Arg::reset();
+	_values.clear();
+}
+
+} // namespace TCLAP
+
+#endif

components/mkspiffs/src/tclap/MultiSwitchArg.h

@@ -0,0 +1,216 @@
+
+/****************************************************************************** 
+*
+*  file:  MultiSwitchArg.h
+*
+*  Copyright (c) 2003, Michael E. Smoot .
+*  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+*  Copyright (c) 2005, Michael E. Smoot, Daniel Aarno, Erik Zeek.
+*  All rights reverved.
+*
+*  See the file COPYING in the top directory of this distribution for
+*  more information.
+*
+*  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+*  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+*  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+*  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+*  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+*  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+*  DEALINGS IN THE SOFTWARE.
+*
+*****************************************************************************/
+
+
+#ifndef TCLAP_MULTI_SWITCH_ARG_H
+#define TCLAP_MULTI_SWITCH_ARG_H
+
+#include <string>
+#include <vector>
+
+#include "SwitchArg.h"
+
+namespace TCLAP {
+
+/**
+* A multiple switch argument.  If the switch is set on the command line, then
+* the getValue method will return the number of times the switch appears.
+*/
+class MultiSwitchArg : public SwitchArg
+{
+	protected:
+
+		/**
+		 * The value of the switch.
+		 */
+		int _value;
+
+		/**
+		 * Used to support the reset() method so that ValueArg can be
+		 * reset to their constructed value.
+		 */
+		int _default;
+
+	public:
+
+		/**
+		 * MultiSwitchArg constructor.
+		 * \param flag - The one character flag that identifies this
+		 * argument on the command line.
+		 * \param name - A one word name for the argument.  Can be
+		 * used as a long flag on the command line.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param init - Optional. The initial/default value of this Arg. 
+		 * Defaults to 0.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		MultiSwitchArg(const std::string& flag, 
+				const std::string& name,
+				const std::string& desc,
+				int init = 0,
+				Visitor* v = NULL);
+
+
+		/**
+		 * MultiSwitchArg constructor.
+		 * \param flag - The one character flag that identifies this
+		 * argument on the command line.
+		 * \param name - A one word name for the argument.  Can be
+		 * used as a long flag on the command line.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param init - Optional. The initial/default value of this Arg. 
+		 * Defaults to 0.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		MultiSwitchArg(const std::string& flag, 
+				const std::string& name,
+				const std::string& desc,
+				CmdLineInterface& parser,
+				int init = 0,
+				Visitor* v = NULL);
+
+
+		/**
+		 * Handles the processing of the argument.
+		 * This re-implements the SwitchArg version of this method to set the
+		 * _value of the argument appropriately.
+		 * \param i - Pointer the the current argument in the list.
+		 * \param args - Mutable list of strings. Passed
+		 * in from main().
+		 */
+		virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+		/**
+		 * Returns int, the number of times the switch has been set.
+		 */
+		int getValue();
+
+		/**
+		 * Returns the shortID for this Arg.
+		 */
+		std::string shortID(const std::string& val) const;
+
+		/**
+		 * Returns the longID for this Arg.
+		 */
+		std::string longID(const std::string& val) const;
+		
+		void reset();
+
+};
+
+//////////////////////////////////////////////////////////////////////
+//BEGIN MultiSwitchArg.cpp
+//////////////////////////////////////////////////////////////////////
+inline MultiSwitchArg::MultiSwitchArg(const std::string& flag,
+					const std::string& name,
+					const std::string& desc,
+					int init,
+					Visitor* v )
+: SwitchArg(flag, name, desc, false, v),
+_value( init ),
+_default( init )
+{ }
+
+inline MultiSwitchArg::MultiSwitchArg(const std::string& flag,
+					const std::string& name, 
+					const std::string& desc, 
+					CmdLineInterface& parser,
+					int init,
+					Visitor* v )
+: SwitchArg(flag, name, desc, false, v),
+_value( init ),
+_default( init )
+{ 
+	parser.add( this );
+}
+
+inline int MultiSwitchArg::getValue() { return _value; }
+
+inline bool MultiSwitchArg::processArg(int *i, std::vector<std::string>& args)
+{
+	if ( _ignoreable && Arg::ignoreRest() )
+		return false;
+
+	if ( argMatches( args[*i] ))
+	{
+		// so the isSet() method will work
+		_alreadySet = true;
+
+		// Matched argument: increment value.
+		++_value;
+
+		_checkWithVisitor();
+
+		return true;
+	}
+	else if ( combinedSwitchesMatch( args[*i] ) )
+	{
+		// so the isSet() method will work
+		_alreadySet = true;
+
+		// Matched argument: increment value.
+		++_value;
+
+		// Check for more in argument and increment value.
+		while ( combinedSwitchesMatch( args[*i] ) ) 
+			++_value;
+
+		_checkWithVisitor();
+
+		return false;
+	}
+	else
+		return false;
+}
+
+inline std::string 
+MultiSwitchArg::shortID(const std::string& val) const
+{
+	return Arg::shortID(val) + " ... ";
+}
+
+inline std::string 
+MultiSwitchArg::longID(const std::string& val) const
+{
+	return Arg::longID(val) + "  (accepted multiple times)";
+}
+
+inline void
+MultiSwitchArg::reset()
+{
+	MultiSwitchArg::_value = MultiSwitchArg::_default;
+}
+
+//////////////////////////////////////////////////////////////////////
+//END MultiSwitchArg.cpp
+//////////////////////////////////////////////////////////////////////
+
+} //namespace TCLAP
+
+#endif

components/mkspiffs/src/tclap/OptionalUnlabeledTracker.h

@@ -0,0 +1,62 @@
+
+
+/****************************************************************************** 
+ * 
+ *  file:  OptionalUnlabeledTracker.h
+ * 
+ *  Copyright (c) 2005, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_OPTIONAL_UNLABELED_TRACKER_H
+#define TCLAP_OPTIONAL_UNLABELED_TRACKER_H
+
+#include <string>
+
+namespace TCLAP {
+
+class OptionalUnlabeledTracker
+{
+
+	public:
+
+		static void check( bool req, const std::string& argName );
+
+		static void gotOptional() { alreadyOptionalRef() = true; }
+
+		static bool& alreadyOptional() { return alreadyOptionalRef(); } 
+
+	private:
+
+		static bool& alreadyOptionalRef() { static bool ct = false; return ct; }
+};
+
+
+inline void OptionalUnlabeledTracker::check( bool req, const std::string& argName )
+{
+    if ( OptionalUnlabeledTracker::alreadyOptional() )
+        throw( SpecificationException(
+	"You can't specify ANY Unlabeled Arg following an optional Unlabeled Arg",
+	                argName ) );
+
+    if ( !req )
+        OptionalUnlabeledTracker::gotOptional();
+}
+
+
+} // namespace TCLAP
+
+#endif

components/mkspiffs/src/tclap/StandardTraits.h

@@ -0,0 +1,208 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/******************************************************************************
+ *
+ *  file:  StandardTraits.h
+ *
+ *  Copyright (c) 2007, Daniel Aarno, Michael E. Smoot .
+ *  All rights reverved.
+ *
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ *  DEALINGS IN THE SOFTWARE.
+ *
+ *****************************************************************************/
+
+// This is an internal tclap file, you should probably not have to
+// include this directly
+
+#ifndef TCLAP_STANDARD_TRAITS_H
+#define TCLAP_STANDARD_TRAITS_H
+
+#ifdef HAVE_CONFIG_H
+#include <config.h> // To check for long long
+#endif
+
+// If Microsoft has already typedef'd wchar_t as an unsigned 
+// short, then compiles will break because it's as if we're
+// creating ArgTraits twice for unsigned short. Thus...
+#ifdef _MSC_VER
+#ifndef _NATIVE_WCHAR_T_DEFINED
+#define TCLAP_DONT_DECLARE_WCHAR_T_ARGTRAITS
+#endif
+#endif
+
+namespace TCLAP {
+
+// ======================================================================
+// Integer types
+// ======================================================================
+
+/**
+ * longs have value-like semantics.
+ */
+template<>
+struct ArgTraits<long> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * ints have value-like semantics.
+ */
+template<>
+struct ArgTraits<int> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * shorts have value-like semantics.
+ */
+template<>
+struct ArgTraits<short> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * chars have value-like semantics.
+ */
+template<>
+struct ArgTraits<char> {
+    typedef ValueLike ValueCategory;
+};
+
+#ifdef HAVE_LONG_LONG
+/**
+ * long longs have value-like semantics.
+ */
+template<>
+struct ArgTraits<long long> {
+    typedef ValueLike ValueCategory;
+};
+#endif
+
+// ======================================================================
+// Unsigned integer types
+// ======================================================================
+
+/**
+ * unsigned longs have value-like semantics.
+ */
+template<>
+struct ArgTraits<unsigned long> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * unsigned ints have value-like semantics.
+ */
+template<>
+struct ArgTraits<unsigned int> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * unsigned shorts have value-like semantics.
+ */
+template<>
+struct ArgTraits<unsigned short> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * unsigned chars have value-like semantics.
+ */
+template<>
+struct ArgTraits<unsigned char> {
+    typedef ValueLike ValueCategory;
+};
+
+// Microsoft implements size_t awkwardly. 
+#if defined(_MSC_VER) && defined(_M_X64)
+/**
+ * size_ts have value-like semantics.
+ */
+template<>
+struct ArgTraits<size_t> {
+    typedef ValueLike ValueCategory;
+};
+#endif
+
+
+#ifdef HAVE_LONG_LONG
+/**
+ * unsigned long longs have value-like semantics.
+ */
+template<>
+struct ArgTraits<unsigned long long> {
+    typedef ValueLike ValueCategory;
+};
+#endif
+
+// ======================================================================
+// Float types
+// ======================================================================
+
+/**
+ * floats have value-like semantics.
+ */
+template<>
+struct ArgTraits<float> {
+    typedef ValueLike ValueCategory;
+};
+
+/**
+ * doubles have value-like semantics.
+ */
+template<>
+struct ArgTraits<double> {
+    typedef ValueLike ValueCategory;
+};
+
+// ======================================================================
+// Other types
+// ======================================================================
+
+/**
+ * bools have value-like semantics.
+ */
+template<>
+struct ArgTraits<bool> {
+    typedef ValueLike ValueCategory;
+};
+
+
+/**
+ * wchar_ts have value-like semantics.
+ */
+#ifndef TCLAP_DONT_DECLARE_WCHAR_T_ARGTRAITS
+template<>
+struct ArgTraits<wchar_t> {
+    typedef ValueLike ValueCategory;
+};
+#endif
+
+/**
+ * Strings have string like argument traits.
+ */
+template<>
+struct ArgTraits<std::string> {
+    typedef StringLike ValueCategory;
+};
+
+template<typename T>
+void SetString(T &dst, const std::string &src)
+{
+    dst = src;
+}
+
+} // namespace
+
+#endif
+

components/mkspiffs/src/tclap/StdOutput.h

@@ -0,0 +1,298 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/****************************************************************************** 
+ * 
+ *  file:  StdOutput.h
+ * 
+ *  Copyright (c) 2004, Michael E. Smoot
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_STDCMDLINEOUTPUT_H
+#define TCLAP_STDCMDLINEOUTPUT_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <algorithm>
+
+#include "CmdLineInterface.h"
+#include "CmdLineOutput.h"
+#include "XorHandler.h"
+#include "Arg.h"
+
+namespace TCLAP {
+
+/**
+ * A class that isolates any output from the CmdLine object so that it
+ * may be easily modified.
+ */
+class StdOutput : public CmdLineOutput
+{
+
+	public:
+
+		/**
+		 * Prints the usage to stdout.  Can be overridden to 
+		 * produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void usage(CmdLineInterface& c);
+
+		/**
+		 * Prints the version to stdout. Can be overridden 
+		 * to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void version(CmdLineInterface& c);
+
+		/**
+		 * Prints (to stderr) an error message, short usage 
+		 * Can be overridden to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 * \param e - The ArgException that caused the failure. 
+		 */
+		virtual void failure(CmdLineInterface& c, 
+				     ArgException& e );
+
+	protected:
+
+        /**
+         * Writes a brief usage message with short args.
+		 * \param c - The CmdLine object the output is generated for. 
+         * \param os - The stream to write the message to.
+         */
+        void _shortUsage( CmdLineInterface& c, std::ostream& os ) const;
+
+        /**
+		 * Writes a longer usage message with long and short args, 
+		 * provides descriptions and prints message.
+		 * \param c - The CmdLine object the output is generated for. 
+		 * \param os - The stream to write the message to.
+		 */
+		void _longUsage( CmdLineInterface& c, std::ostream& os ) const;
+
+		/**
+		 * This function inserts line breaks and indents long strings 
+		 * according the  params input. It will only break lines at spaces, 
+		 * commas and pipes.
+		 * \param os - The stream to be printed to.
+		 * \param s - The string to be printed.
+		 * \param maxWidth - The maxWidth allowed for the output line. 
+		 * \param indentSpaces - The number of spaces to indent the first line. 
+		 * \param secondLineOffset - The number of spaces to indent the second
+		 * and all subsequent lines in addition to indentSpaces.
+		 */
+		void spacePrint( std::ostream& os, 
+						 const std::string& s, 
+						 int maxWidth, 
+						 int indentSpaces, 
+						 int secondLineOffset ) const;
+
+};
+
+
+inline void StdOutput::version(CmdLineInterface& _cmd) 
+{
+	std::string progName = _cmd.getProgramName();
+	std::string xversion = _cmd.getVersion();
+
+	std::cout << std::endl << progName << "  version: " 
+			  << xversion << std::endl << std::endl;
+}
+
+inline void StdOutput::usage(CmdLineInterface& _cmd ) 
+{
+	std::cout << std::endl << "USAGE: " << std::endl << std::endl; 
+
+	_shortUsage( _cmd, std::cout );
+
+	std::cout << std::endl << std::endl << "Where: " << std::endl << std::endl;
+
+	_longUsage( _cmd, std::cout );
+
+	std::cout << std::endl; 
+
+}
+
+inline void StdOutput::failure( CmdLineInterface& _cmd,
+								ArgException& e ) 
+{
+	std::string progName = _cmd.getProgramName();
+
+	std::cerr << "PARSE ERROR: " << e.argId() << std::endl
+		      << "             " << e.error() << std::endl << std::endl;
+
+	if ( _cmd.hasHelpAndVersion() )
+		{
+			std::cerr << "Brief USAGE: " << std::endl;
+
+			_shortUsage( _cmd, std::cerr );	
+
+			std::cerr << std::endl << "For complete USAGE and HELP type: " 
+					  << std::endl << "   " << progName << " --help" 
+					  << std::endl << std::endl;
+		}
+	else
+		usage(_cmd);
+
+	throw ExitException(1);
+}
+
+inline void 
+StdOutput::_shortUsage( CmdLineInterface& _cmd, 
+						std::ostream& os ) const
+{
+	std::list<Arg*> argList = _cmd.getArgList();
+	std::string progName = _cmd.getProgramName();
+	XorHandler xorHandler = _cmd.getXorHandler();
+	std::vector< std::vector<Arg*> > xorList = xorHandler.getXorList();
+
+	std::string s = progName + " ";
+
+	// first the xor
+	for ( int i = 0; static_cast<unsigned int>(i) < xorList.size(); i++ )
+		{
+			s += " {";
+			for ( ArgVectorIterator it = xorList[i].begin(); 
+				  it != xorList[i].end(); it++ )
+				s += (*it)->shortID() + "|";
+
+			s[s.length()-1] = '}';
+		}
+
+	// then the rest
+	for (ArgListIterator it = argList.begin(); it != argList.end(); it++)
+		if ( !xorHandler.contains( (*it) ) )
+			s += " " + (*it)->shortID();
+
+	// if the program name is too long, then adjust the second line offset 
+	int secondLineOffset = static_cast<int>(progName.length()) + 2;
+	if ( secondLineOffset > 75/2 )
+		secondLineOffset = static_cast<int>(75/2);
+
+	spacePrint( os, s, 75, 3, secondLineOffset );
+}
+
+inline void 
+StdOutput::_longUsage( CmdLineInterface& _cmd, 
+					   std::ostream& os ) const
+{
+	std::list<Arg*> argList = _cmd.getArgList();
+	std::string message = _cmd.getMessage();
+	XorHandler xorHandler = _cmd.getXorHandler();
+	std::vector< std::vector<Arg*> > xorList = xorHandler.getXorList();
+
+	// first the xor 
+	for ( int i = 0; static_cast<unsigned int>(i) < xorList.size(); i++ )
+		{
+			for ( ArgVectorIterator it = xorList[i].begin(); 
+				  it != xorList[i].end(); 
+				  it++ )
+				{
+					spacePrint( os, (*it)->longID(), 75, 3, 3 );
+					spacePrint( os, (*it)->getDescription(), 75, 5, 0 );
+
+					if ( it+1 != xorList[i].end() )
+						spacePrint(os, "-- OR --", 75, 9, 0);
+				}
+			os << std::endl << std::endl;
+		}
+
+	// then the rest
+	for (ArgListIterator it = argList.begin(); it != argList.end(); it++)
+		if ( !xorHandler.contains( (*it) ) )
+			{
+				spacePrint( os, (*it)->longID(), 75, 3, 3 ); 
+				spacePrint( os, (*it)->getDescription(), 75, 5, 0 ); 
+				os << std::endl;
+			}
+
+	os << std::endl;
+
+	spacePrint( os, message, 75, 3, 0 );
+}
+
+inline void StdOutput::spacePrint( std::ostream& os, 
+						           const std::string& s, 
+						           int maxWidth, 
+						           int indentSpaces, 
+						           int secondLineOffset ) const
+{
+	int len = static_cast<int>(s.length());
+
+	if ( (len + indentSpaces > maxWidth) && maxWidth > 0 )
+		{
+			int allowedLen = maxWidth - indentSpaces;
+			int start = 0;
+			while ( start < len )
+				{
+					// find the substring length
+					// int stringLen = std::min<int>( len - start, allowedLen );
+					// doing it this way to support a VisualC++ 2005 bug 
+					using namespace std; 
+					int stringLen = min<int>( len - start, allowedLen );
+
+					// trim the length so it doesn't end in middle of a word
+					if ( stringLen == allowedLen )
+						while ( stringLen >= 0 &&
+								s[stringLen+start] != ' ' && 
+								s[stringLen+start] != ',' &&
+								s[stringLen+start] != '|' ) 
+							stringLen--;
+	
+					// ok, the word is longer than the line, so just split 
+					// wherever the line ends
+					if ( stringLen <= 0 )
+						stringLen = allowedLen;
+
+					// check for newlines
+					for ( int i = 0; i < stringLen; i++ )
+						if ( s[start+i] == '\n' )
+							stringLen = i+1;
+
+					// print the indent	
+					for ( int i = 0; i < indentSpaces; i++ )
+						os << " ";
+
+					if ( start == 0 )
+						{
+							// handle second line offsets
+							indentSpaces += secondLineOffset;
+
+							// adjust allowed len
+							allowedLen -= secondLineOffset;
+						}
+
+					os << s.substr(start,stringLen) << std::endl;
+
+					// so we don't start a line with a space
+					while ( s[stringLen+start] == ' ' && start < len )
+						start++;
+			
+					start += stringLen;
+				}
+		}
+	else
+		{
+			for ( int i = 0; i < indentSpaces; i++ )
+				os << " ";
+			os << s << std::endl;
+		}
+}
+
+} //namespace TCLAP
+#endif 

components/mkspiffs/src/tclap/SwitchArg.h

@@ -0,0 +1,266 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  SwitchArg.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_SWITCH_ARG_H
+#define TCLAP_SWITCH_ARG_H
+
+#include <string>
+#include <vector>
+
+#include "Arg.h"
+
+namespace TCLAP {
+
+/**
+ * A simple switch argument.  If the switch is set on the command line, then
+ * the getValue method will return the opposite of the default value for the
+ * switch.
+ */
+class SwitchArg : public Arg
+{
+	protected:
+
+		/**
+		 * The value of the switch.
+		 */
+		bool _value;
+
+		/**
+		 * Used to support the reset() method so that ValueArg can be
+		 * reset to their constructed value.
+		 */
+        bool _default;
+
+	public:
+
+        /**
+		 * SwitchArg constructor.
+		 * \param flag - The one character flag that identifies this
+		 * argument on the command line.
+		 * \param name - A one word name for the argument.  Can be
+		 * used as a long flag on the command line.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param def - The default value for this Switch. 
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		SwitchArg(const std::string& flag, 
+			      const std::string& name, 
+			      const std::string& desc,
+			      bool def = false,
+				  Visitor* v = NULL);
+
+				  
+		/**
+		 * SwitchArg constructor.
+		 * \param flag - The one character flag that identifies this
+		 * argument on the command line.
+		 * \param name - A one word name for the argument.  Can be
+		 * used as a long flag on the command line.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param def - The default value for this Switch.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		SwitchArg(const std::string& flag, 
+			      const std::string& name, 
+			      const std::string& desc,
+				  CmdLineInterface& parser,
+			      bool def = false,
+				  Visitor* v = NULL);
+				  
+				  
+        /**
+		 * Handles the processing of the argument.
+		 * This re-implements the Arg version of this method to set the
+		 * _value of the argument appropriately.
+		 * \param i - Pointer the the current argument in the list.
+		 * \param args - Mutable list of strings. Passed
+		 * in from main().
+		 */
+		virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+		/**
+		 * Checks a string to see if any of the chars in the string
+		 * match the flag for this Switch.
+		 */
+		bool combinedSwitchesMatch(std::string& combined);
+
+		/**
+		 * Returns bool, whether or not the switch has been set.
+		 */
+		bool getValue();
+		
+		virtual void reset();
+
+	private:
+		/**
+		 * Checks to see if we've found the last match in
+		 * a combined string.
+		 */
+		bool lastCombined(std::string& combined);
+
+		/**
+		 * Does the common processing of processArg.
+		 */
+		void commonProcessing();
+};
+
+//////////////////////////////////////////////////////////////////////
+//BEGIN SwitchArg.cpp
+//////////////////////////////////////////////////////////////////////
+inline SwitchArg::SwitchArg(const std::string& flag, 
+                            const std::string& name, 
+                            const std::string& desc, 
+                            bool default_val,
+                            Visitor* v )
+: Arg(flag, name, desc, false, false, v),
+  _value( default_val ),
+  _default( default_val )
+{ }
+
+inline SwitchArg::SwitchArg(const std::string& flag, 
+                            const std::string& name, 
+                            const std::string& desc, 
+                            CmdLineInterface& parser,
+                            bool default_val,
+                            Visitor* v )
+: Arg(flag, name, desc, false, false, v),
+  _value( default_val ),
+  _default(default_val)
+{ 
+	parser.add( this );
+}
+
+inline bool SwitchArg::getValue() { return _value; }
+
+inline bool SwitchArg::lastCombined(std::string& combinedSwitches ) 
+{
+	for ( unsigned int i = 1; i < combinedSwitches.length(); i++ )
+		if ( combinedSwitches[i] != Arg::blankChar() )
+			return false;
+	
+	return true;
+}
+
+inline bool SwitchArg::combinedSwitchesMatch(std::string& combinedSwitches )
+{
+	// make sure this is actually a combined switch
+	if ( combinedSwitches.length() > 0 &&
+	     combinedSwitches[0] != Arg::flagStartString()[0] )
+		return false;
+
+	// make sure it isn't a long name 
+	if ( combinedSwitches.substr( 0, Arg::nameStartString().length() ) == 
+	     Arg::nameStartString() )
+		return false;
+
+	// make sure the delimiter isn't in the string 
+	if ( combinedSwitches.find_first_of( Arg::delimiter() ) != std::string::npos )
+		return false;
+
+	// ok, we're not specifying a ValueArg, so we know that we have
+	// a combined switch list.  
+	for ( unsigned int i = 1; i < combinedSwitches.length(); i++ )
+		if ( _flag.length() > 0 && 
+		     combinedSwitches[i] == _flag[0] &&
+		     _flag[0] != Arg::flagStartString()[0] ) 
+		{
+			// update the combined switches so this one is no longer present
+			// this is necessary so that no unlabeled args are matched
+			// later in the processing.
+			//combinedSwitches.erase(i,1);
+			combinedSwitches[i] = Arg::blankChar(); 
+			return true;
+		}
+
+	// none of the switches passed in the list match. 
+	return false;	
+}
+
+inline void SwitchArg::commonProcessing()
+{
+	if ( _xorSet )
+		throw(CmdLineParseException(
+		      "Mutually exclusive argument already set!", toString()));
+
+	if ( _alreadySet ) 
+		throw(CmdLineParseException("Argument already set!", toString()));
+
+	_alreadySet = true;
+
+	if ( _value == true )
+		_value = false;
+	else
+		_value = true;
+
+	_checkWithVisitor();
+}
+
+inline bool SwitchArg::processArg(int *i, std::vector<std::string>& args)
+{
+	if ( _ignoreable && Arg::ignoreRest() )
+		return false;
+
+	// if the whole string matches the flag or name string
+	if ( argMatches( args[*i] ) )
+	{
+		commonProcessing();
+
+		return true;
+	}
+	// if a substring matches the flag as part of a combination
+	else if ( combinedSwitchesMatch( args[*i] ) )
+	{
+		// check again to ensure we don't misinterpret 
+		// this as a MultiSwitchArg 
+		if ( combinedSwitchesMatch( args[*i] ) )
+			throw(CmdLineParseException("Argument already set!", 
+			                            toString()));
+
+		commonProcessing();
+
+		// We only want to return true if we've found the last combined
+		// match in the string, otherwise we return true so that other 
+		// switches in the combination will have a chance to match.
+		return lastCombined( args[*i] );
+	}
+	else
+		return false;
+}
+
+inline void SwitchArg::reset()
+{
+	Arg::reset();
+	_value = _default;  
+}
+//////////////////////////////////////////////////////////////////////
+//End SwitchArg.cpp
+//////////////////////////////////////////////////////////////////////
+
+} //namespace TCLAP
+
+#endif

components/mkspiffs/src/tclap/UnlabeledMultiArg.h

@@ -0,0 +1,301 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  UnlabeledMultiArg.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_MULTIPLE_UNLABELED_ARGUMENT_H
+#define TCLAP_MULTIPLE_UNLABELED_ARGUMENT_H
+
+#include <string>
+#include <vector>
+
+#include "MultiArg.h"
+#include "OptionalUnlabeledTracker.h"
+
+namespace TCLAP {
+
+/**
+ * Just like a MultiArg, except that the arguments are unlabeled.  Basically,
+ * this Arg will slurp up everything that hasn't been matched to another 
+ * Arg.
+ */
+template<class T>
+class UnlabeledMultiArg : public MultiArg<T>
+{
+
+	// If compiler has two stage name lookup (as gcc >= 3.4 does)
+	// this is requried to prevent undef. symbols
+	using MultiArg<T>::_ignoreable;
+	using MultiArg<T>::_hasBlanks;
+	using MultiArg<T>::_extractValue;
+	using MultiArg<T>::_typeDesc;
+	using MultiArg<T>::_name;
+	using MultiArg<T>::_description;
+	using MultiArg<T>::_alreadySet;
+	using MultiArg<T>::toString;
+
+	public:
+		
+		/**
+		 * Constructor.  
+		 * \param name - The name of the Arg. Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 *  line.
+		 * \param typeDesc - A short, human readable description of the
+		 * type that this object expects.  This is used in the generation
+		 * of the USAGE statement.  The goal is to be helpful to the end user
+		 * of the program.
+		 * \param ignoreable - Whether or not this argument can be ignored
+		 * using the "--" flag.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		UnlabeledMultiArg( const std::string& name,
+				           const std::string& desc,
+						   bool req,
+				           const std::string& typeDesc,
+						   bool ignoreable = false,
+				           Visitor* v = NULL );
+		/**
+		 * Constructor.  
+		 * \param name - The name of the Arg. Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 *  line.
+		 * \param typeDesc - A short, human readable description of the
+		 * type that this object expects.  This is used in the generation
+		 * of the USAGE statement.  The goal is to be helpful to the end user
+		 * of the program.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param ignoreable - Whether or not this argument can be ignored
+		 * using the "--" flag.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		UnlabeledMultiArg( const std::string& name,
+				           const std::string& desc,
+						   bool req,
+				           const std::string& typeDesc,
+						   CmdLineInterface& parser,
+						   bool ignoreable = false,
+				           Visitor* v = NULL );
+						 
+		/**
+		 * Constructor.  
+		 * \param name - The name of the Arg. Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 *  line.
+		 * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+		 * \param ignoreable - Whether or not this argument can be ignored
+		 * using the "--" flag.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		UnlabeledMultiArg( const std::string& name,
+						   const std::string& desc,
+						   bool req,
+						   Constraint<T>* constraint,
+						   bool ignoreable = false,
+						   Visitor* v = NULL );
+
+		/**
+		 * Constructor.  
+		 * \param name - The name of the Arg. Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 *  line.
+		 * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param ignoreable - Whether or not this argument can be ignored
+		 * using the "--" flag.
+		 * \param v - An optional visitor.  You probably should not
+		 * use this unless you have a very good reason.
+		 */
+		UnlabeledMultiArg( const std::string& name, 
+						   const std::string& desc, 
+						   bool req,
+						   Constraint<T>* constraint,
+						   CmdLineInterface& parser,
+						   bool ignoreable = false,
+						   Visitor* v = NULL );
+						 
+		/**
+		 * Handles the processing of the argument.
+		 * This re-implements the Arg version of this method to set the
+		 * _value of the argument appropriately.  It knows the difference
+		 * between labeled and unlabeled.
+		 * \param i - Pointer the the current argument in the list.
+		 * \param args - Mutable list of strings. Passed from main().
+		 */
+		virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+		/**
+		 * Returns the a short id string.  Used in the usage.
+		 * \param val - value to be used.
+		 */
+		virtual std::string shortID(const std::string& val="val") const;
+
+		/**
+		 * Returns the a long id string.  Used in the usage.
+		 * \param val - value to be used.
+		 */
+		virtual std::string longID(const std::string& val="val") const;
+
+		/**
+		 * Opertor ==.
+		 * \param a - The Arg to be compared to this.
+		 */
+		virtual bool operator==(const Arg& a) const;
+
+		/**
+		 * Pushes this to back of list rather than front.
+		 * \param argList - The list this should be added to.
+		 */
+		virtual void addToList( std::list<Arg*>& argList ) const;
+};
+
+template<class T>
+UnlabeledMultiArg<T>::UnlabeledMultiArg(const std::string& name, 
+				                        const std::string& desc, 
+										bool req,
+					                    const std::string& typeDesc,
+										bool ignoreable,
+					                    Visitor* v)
+: MultiArg<T>("", name, desc,  req, typeDesc, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(true, toString());
+}
+
+template<class T>
+UnlabeledMultiArg<T>::UnlabeledMultiArg(const std::string& name, 
+				                        const std::string& desc, 
+										bool req,
+					                    const std::string& typeDesc,
+										CmdLineInterface& parser,
+										bool ignoreable,
+					                    Visitor* v)
+: MultiArg<T>("", name, desc,  req, typeDesc, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(true, toString());
+	parser.add( this );
+}
+
+
+template<class T>
+UnlabeledMultiArg<T>::UnlabeledMultiArg(const std::string& name, 
+				                        const std::string& desc, 
+										bool req,
+					                    Constraint<T>* constraint,
+										bool ignoreable,
+					                    Visitor* v)
+: MultiArg<T>("", name, desc,  req, constraint, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(true, toString());
+}
+
+template<class T>
+UnlabeledMultiArg<T>::UnlabeledMultiArg(const std::string& name, 
+				                        const std::string& desc, 
+										bool req,
+					                    Constraint<T>* constraint,
+										CmdLineInterface& parser,
+										bool ignoreable,
+					                    Visitor* v)
+: MultiArg<T>("", name, desc,  req, constraint, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(true, toString());
+	parser.add( this );
+}
+
+
+template<class T>
+bool UnlabeledMultiArg<T>::processArg(int *i, std::vector<std::string>& args) 
+{
+
+	if ( _hasBlanks( args[*i] ) )
+		return false;
+
+	// never ignore an unlabeled multi arg
+
+
+	// always take the first value, regardless of the start string 
+	_extractValue( args[(*i)] );
+
+	/*
+	// continue taking args until we hit the end or a start string 
+	while ( (unsigned int)(*i)+1 < args.size() &&
+			args[(*i)+1].find_first_of( Arg::flagStartString() ) != 0 &&
+            args[(*i)+1].find_first_of( Arg::nameStartString() ) != 0 ) 
+		_extractValue( args[++(*i)] );
+	*/
+
+	_alreadySet = true;
+
+	return true;
+}
+
+template<class T>
+std::string UnlabeledMultiArg<T>::shortID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return std::string("<") + _typeDesc + "> ...";
+}
+
+template<class T>
+std::string UnlabeledMultiArg<T>::longID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return std::string("<") + _typeDesc + ">  (accepted multiple times)";
+}
+
+template<class T>
+bool UnlabeledMultiArg<T>::operator==(const Arg& a) const
+{
+	if ( _name == a.getName() || _description == a.getDescription() )
+		return true;
+	else
+		return false;
+}
+
+template<class T>
+void UnlabeledMultiArg<T>::addToList( std::list<Arg*>& argList ) const
+{
+	argList.push_back( const_cast<Arg*>(static_cast<const Arg* const>(this)) );
+}
+
+}
+
+#endif

components/mkspiffs/src/tclap/UnlabeledValueArg.h

@@ -0,0 +1,340 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  UnlabeledValueArg.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_UNLABELED_VALUE_ARGUMENT_H
+#define TCLAP_UNLABELED_VALUE_ARGUMENT_H
+
+#include <string>
+#include <vector>
+
+#include "ValueArg.h"
+#include "OptionalUnlabeledTracker.h"
+
+
+namespace TCLAP {
+
+/**
+ * The basic unlabeled argument that parses a value.
+ * This is a template class, which means the type T defines the type
+ * that a given object will attempt to parse when an UnlabeledValueArg
+ * is reached in the list of args that the CmdLine iterates over.
+ */
+template<class T>
+class UnlabeledValueArg : public ValueArg<T>
+{
+
+	// If compiler has two stage name lookup (as gcc >= 3.4 does)
+	// this is requried to prevent undef. symbols
+	using ValueArg<T>::_ignoreable;
+	using ValueArg<T>::_hasBlanks;
+	using ValueArg<T>::_extractValue;
+	using ValueArg<T>::_typeDesc;
+	using ValueArg<T>::_name;
+	using ValueArg<T>::_description;
+	using ValueArg<T>::_alreadySet;
+	using ValueArg<T>::toString;
+
+	public:
+
+		/**
+		 * UnlabeledValueArg constructor.
+		 * \param name - A one word name for the argument.  Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 * line.
+		 * \param value - The default value assigned to this argument if it
+		 * is not present on the command line.
+		 * \param typeDesc - A short, human readable description of the
+		 * type that this object expects.  This is used in the generation
+		 * of the USAGE statement.  The goal is to be helpful to the end user
+		 * of the program.
+		 * \param ignoreable - Allows you to specify that this argument can be
+		 * ignored if the '--' flag is set.  This defaults to false (cannot
+		 * be ignored) and should  generally stay that way unless you have 
+		 * some special need for certain arguments to be ignored.
+		 * \param v - Optional Vistor.  You should leave this blank unless
+		 * you have a very good reason.
+		 */
+		UnlabeledValueArg( const std::string& name, 
+			               const std::string& desc, 
+						   bool req,
+				           T value,
+				           const std::string& typeDesc,
+						   bool ignoreable = false,
+				           Visitor* v = NULL); 
+
+		/**
+		 * UnlabeledValueArg constructor.
+		 * \param name - A one word name for the argument.  Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 * line.
+		 * \param value - The default value assigned to this argument if it
+		 * is not present on the command line.
+		 * \param typeDesc - A short, human readable description of the
+		 * type that this object expects.  This is used in the generation
+		 * of the USAGE statement.  The goal is to be helpful to the end user
+		 * of the program.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param ignoreable - Allows you to specify that this argument can be
+		 * ignored if the '--' flag is set.  This defaults to false (cannot
+		 * be ignored) and should  generally stay that way unless you have 
+		 * some special need for certain arguments to be ignored.
+		 * \param v - Optional Vistor.  You should leave this blank unless
+		 * you have a very good reason.
+		 */
+		UnlabeledValueArg( const std::string& name, 
+			               const std::string& desc, 
+						   bool req,
+				           T value,
+				           const std::string& typeDesc,
+						   CmdLineInterface& parser,
+						   bool ignoreable = false,
+				           Visitor* v = NULL ); 					
+						
+		/**
+		 * UnlabeledValueArg constructor.
+		 * \param name - A one word name for the argument.  Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 * line.
+		 * \param value - The default value assigned to this argument if it
+		 * is not present on the command line.
+		 * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+		 * \param ignoreable - Allows you to specify that this argument can be
+		 * ignored if the '--' flag is set.  This defaults to false (cannot
+		 * be ignored) and should  generally stay that way unless you have 
+		 * some special need for certain arguments to be ignored.
+		 * \param v - Optional Vistor.  You should leave this blank unless
+		 * you have a very good reason.
+		 */
+		UnlabeledValueArg( const std::string& name, 
+			               const std::string& desc, 
+						   bool req,
+				           T value,
+				           Constraint<T>* constraint,
+						   bool ignoreable = false,
+				           Visitor* v = NULL ); 
+
+		
+		/**
+		 * UnlabeledValueArg constructor.
+		 * \param name - A one word name for the argument.  Note that this is used for
+		 * identification, not as a long flag.
+		 * \param desc - A description of what the argument is for or
+		 * does.
+		 * \param req - Whether the argument is required on the command
+		 * line.
+		 * \param value - The default value assigned to this argument if it
+		 * is not present on the command line.
+		 * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+		 * \param parser - A CmdLine parser object to add this Arg to
+		 * \param ignoreable - Allows you to specify that this argument can be
+		 * ignored if the '--' flag is set.  This defaults to false (cannot
+		 * be ignored) and should  generally stay that way unless you have 
+		 * some special need for certain arguments to be ignored.
+		 * \param v - Optional Vistor.  You should leave this blank unless
+		 * you have a very good reason.
+		 */
+		UnlabeledValueArg( const std::string& name, 
+			               const std::string& desc, 
+						   bool req,
+				           T value,
+				           Constraint<T>* constraint,
+						   CmdLineInterface& parser,
+						   bool ignoreable = false,
+				           Visitor* v = NULL);
+						
+		/**
+		 * Handles the processing of the argument.
+		 * This re-implements the Arg version of this method to set the
+		 * _value of the argument appropriately.  Handling specific to
+		 * unlabled arguments.
+		 * \param i - Pointer the the current argument in the list.
+		 * \param args - Mutable list of strings. 
+		 */
+		virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+		/**
+		 * Overrides shortID for specific behavior.
+		 */
+		virtual std::string shortID(const std::string& val="val") const;
+
+		/**
+		 * Overrides longID for specific behavior.
+		 */
+		virtual std::string longID(const std::string& val="val") const;
+
+		/**
+		 * Overrides operator== for specific behavior.
+		 */
+		virtual bool operator==(const Arg& a ) const;
+
+		/**
+		 * Instead of pushing to the front of list, push to the back.
+		 * \param argList - The list to add this to.
+		 */
+		virtual void addToList( std::list<Arg*>& argList ) const;
+
+};
+
+/**
+ * Constructor implemenation.
+ */
+template<class T>
+UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name, 
+					                    const std::string& desc, 
+										bool req,
+					                    T val,
+					                    const std::string& typeDesc,
+					                    bool ignoreable,
+					                    Visitor* v)
+: ValueArg<T>("", name, desc, req, val, typeDesc, v)
+{ 
+	_ignoreable = ignoreable;
+
+	OptionalUnlabeledTracker::check(req, toString());
+
+}
+
+template<class T>
+UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name, 
+					                    const std::string& desc, 
+										bool req,
+					                    T val,
+					                    const std::string& typeDesc,
+					                    CmdLineInterface& parser,
+					                    bool ignoreable,
+					                    Visitor* v)
+: ValueArg<T>("", name, desc, req, val, typeDesc, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(req, toString());
+	parser.add( this );
+}
+
+/**
+ * Constructor implemenation.
+ */
+template<class T>
+UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name, 
+                                        const std::string& desc, 
+										bool req,
+                                        T val,
+                                        Constraint<T>* constraint,
+                                        bool ignoreable,
+                                        Visitor* v)
+: ValueArg<T>("", name, desc, req, val, constraint, v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(req, toString());
+}
+
+template<class T>
+UnlabeledValueArg<T>::UnlabeledValueArg(const std::string& name, 
+					                    const std::string& desc, 
+										bool req,
+					                    T val,
+					                    Constraint<T>* constraint,
+					                    CmdLineInterface& parser,
+					                    bool ignoreable,
+					                    Visitor* v)
+: ValueArg<T>("", name, desc, req, val, constraint,  v)
+{ 
+	_ignoreable = ignoreable;
+	OptionalUnlabeledTracker::check(req, toString());
+	parser.add( this );
+}
+
+/**
+ * Implementation of processArg().
+ */
+template<class T>
+bool UnlabeledValueArg<T>::processArg(int *i, std::vector<std::string>& args) 
+{
+	
+	if ( _alreadySet )
+		return false;
+	
+	if ( _hasBlanks( args[*i] ) )
+		return false;
+
+	// never ignore an unlabeled arg
+	
+	_extractValue( args[*i] );
+	_alreadySet = true;
+	return true;
+}
+
+/**
+ * Overriding shortID for specific output.
+ */
+template<class T>
+std::string UnlabeledValueArg<T>::shortID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return std::string("<") + _typeDesc + ">";
+}
+
+/**
+ * Overriding longID for specific output.
+ */
+template<class T>
+std::string UnlabeledValueArg<T>::longID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+
+	// Ideally we would like to be able to use RTTI to return the name
+	// of the type required for this argument.  However, g++ at least, 
+	// doesn't appear to return terribly useful "names" of the types.  
+	return std::string("<") + _typeDesc + ">";
+}
+
+/**
+ * Overriding operator== for specific behavior.
+ */
+template<class T>
+bool UnlabeledValueArg<T>::operator==(const Arg& a ) const
+{
+	if ( _name == a.getName() || _description == a.getDescription() )
+		return true;
+	else
+		return false;
+}
+
+template<class T>
+void UnlabeledValueArg<T>::addToList( std::list<Arg*>& argList ) const
+{
+	argList.push_back( const_cast<Arg*>(static_cast<const Arg* const>(this)) );
+}
+
+}
+#endif

components/mkspiffs/src/tclap/ValueArg.h

@@ -0,0 +1,425 @@
+/****************************************************************************** 
+ * 
+ *  file:  ValueArg.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_VALUE_ARGUMENT_H
+#define TCLAP_VALUE_ARGUMENT_H
+
+#include <string>
+#include <vector>
+
+#include "Arg.h"
+#include "Constraint.h"
+
+namespace TCLAP {
+
+/**
+ * The basic labeled argument that parses a value.
+ * This is a template class, which means the type T defines the type
+ * that a given object will attempt to parse when the flag/name is matched
+ * on the command line.  While there is nothing stopping you from creating
+ * an unflagged ValueArg, it is unwise and would cause significant problems.
+ * Instead use an UnlabeledValueArg.
+ */
+template<class T>
+class ValueArg : public Arg 
+{
+    protected:
+
+        /**
+         * The value parsed from the command line.
+         * Can be of any type, as long as the >> operator for the type
+         * is defined.
+         */
+        T _value;
+
+		/**
+		 * Used to support the reset() method so that ValueArg can be
+		 * reset to their constructed value.
+		 */
+        T _default;
+
+        /**
+         * A human readable description of the type to be parsed.
+         * This is a hack, plain and simple.  Ideally we would use RTTI to
+         * return the name of type T, but until there is some sort of
+         * consistent support for human readable names, we are left to our
+         * own devices.
+         */
+        std::string _typeDesc;
+
+        /**
+         * A Constraint this Arg must conform to. 
+         */
+        Constraint<T>* _constraint;
+
+        /**
+         * Extracts the value from the string.
+         * Attempts to parse string as type T, if this fails an exception
+         * is thrown.
+         * \param val - value to be parsed. 
+         */
+        void _extractValue( const std::string& val );
+
+	public:
+
+        /**
+         * Labeled ValueArg constructor.
+         * You could conceivably call this constructor with a blank flag, 
+         * but that would make you a bad person.  It would also cause
+         * an exception to be thrown.   If you want an unlabeled argument, 
+         * use the other constructor.
+         * \param flag - The one character flag that identifies this
+         * argument on the command line.
+         * \param name - A one word name for the argument.  Can be
+         * used as a long flag on the command line.
+         * \param desc - A description of what the argument is for or
+         * does.
+         * \param req - Whether the argument is required on the command
+         * line.
+         * \param value - The default value assigned to this argument if it
+         * is not present on the command line.
+         * \param typeDesc - A short, human readable description of the
+         * type that this object expects.  This is used in the generation
+         * of the USAGE statement.  The goal is to be helpful to the end user
+         * of the program.
+         * \param v - An optional visitor.  You probably should not
+         * use this unless you have a very good reason.
+         */
+        ValueArg( const std::string& flag, 
+                  const std::string& name, 
+                  const std::string& desc, 
+                  bool req, 
+                  T value,
+                  const std::string& typeDesc,
+                  Visitor* v = NULL);
+				 
+				 
+        /**
+         * Labeled ValueArg constructor.
+         * You could conceivably call this constructor with a blank flag, 
+         * but that would make you a bad person.  It would also cause
+         * an exception to be thrown.   If you want an unlabeled argument, 
+         * use the other constructor.
+         * \param flag - The one character flag that identifies this
+         * argument on the command line.
+         * \param name - A one word name for the argument.  Can be
+         * used as a long flag on the command line.
+         * \param desc - A description of what the argument is for or
+         * does.
+         * \param req - Whether the argument is required on the command
+         * line.
+         * \param value - The default value assigned to this argument if it
+         * is not present on the command line.
+         * \param typeDesc - A short, human readable description of the
+         * type that this object expects.  This is used in the generation
+         * of the USAGE statement.  The goal is to be helpful to the end user
+         * of the program.
+         * \param parser - A CmdLine parser object to add this Arg to
+         * \param v - An optional visitor.  You probably should not
+         * use this unless you have a very good reason.
+         */
+        ValueArg( const std::string& flag, 
+                  const std::string& name, 
+                  const std::string& desc, 
+                  bool req, 
+                  T value,
+                  const std::string& typeDesc,
+                  CmdLineInterface& parser,
+                  Visitor* v = NULL );
+ 
+        /**
+         * Labeled ValueArg constructor.
+         * You could conceivably call this constructor with a blank flag, 
+         * but that would make you a bad person.  It would also cause
+         * an exception to be thrown.   If you want an unlabeled argument, 
+         * use the other constructor.
+         * \param flag - The one character flag that identifies this
+         * argument on the command line.
+         * \param name - A one word name for the argument.  Can be
+         * used as a long flag on the command line.
+         * \param desc - A description of what the argument is for or
+         * does.
+         * \param req - Whether the argument is required on the command
+         * line.
+         * \param value - The default value assigned to this argument if it
+         * is not present on the command line.
+         * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+         * \param parser - A CmdLine parser object to add this Arg to.
+         * \param v - An optional visitor.  You probably should not
+         * use this unless you have a very good reason.
+         */
+        ValueArg( const std::string& flag, 
+                  const std::string& name, 
+                  const std::string& desc, 
+                  bool req, 
+                  T value,
+                  Constraint<T>* constraint,
+                  CmdLineInterface& parser,
+                  Visitor* v = NULL );
+	  
+        /**
+         * Labeled ValueArg constructor.
+         * You could conceivably call this constructor with a blank flag, 
+         * but that would make you a bad person.  It would also cause
+         * an exception to be thrown.   If you want an unlabeled argument, 
+         * use the other constructor.
+         * \param flag - The one character flag that identifies this
+         * argument on the command line.
+         * \param name - A one word name for the argument.  Can be
+         * used as a long flag on the command line.
+         * \param desc - A description of what the argument is for or
+         * does.
+         * \param req - Whether the argument is required on the command
+         * line.
+         * \param value - The default value assigned to this argument if it
+         * is not present on the command line.
+         * \param constraint - A pointer to a Constraint object used
+		 * to constrain this Arg.
+         * \param v - An optional visitor.  You probably should not
+         * use this unless you have a very good reason.
+         */
+        ValueArg( const std::string& flag, 
+                  const std::string& name, 
+                  const std::string& desc, 
+                  bool req, 
+                  T value,
+                  Constraint<T>* constraint,
+                  Visitor* v = NULL );
+
+        /**
+         * Handles the processing of the argument.
+         * This re-implements the Arg version of this method to set the
+         * _value of the argument appropriately.  It knows the difference
+         * between labeled and unlabeled.
+         * \param i - Pointer the the current argument in the list.
+         * \param args - Mutable list of strings. Passed 
+         * in from main().
+         */
+        virtual bool processArg(int* i, std::vector<std::string>& args); 
+
+        /**
+         * Returns the value of the argument.
+         */
+        T& getValue() ;
+
+        /**
+         * Specialization of shortID.
+         * \param val - value to be used.
+         */
+        virtual std::string shortID(const std::string& val = "val") const;
+
+        /**
+         * Specialization of longID.
+         * \param val - value to be used.
+         */
+        virtual std::string longID(const std::string& val = "val") const;
+        
+        virtual void reset() ;
+
+private:
+       /**
+        * Prevent accidental copying
+        */
+       ValueArg<T>(const ValueArg<T>& rhs);
+       ValueArg<T>& operator=(const ValueArg<T>& rhs);
+};
+
+
+/**
+ * Constructor implementation.
+ */
+template<class T>
+ValueArg<T>::ValueArg(const std::string& flag, 
+                      const std::string& name, 
+                      const std::string& desc, 
+                      bool req, 
+                      T val,
+                      const std::string& typeDesc,
+                      Visitor* v)
+: Arg(flag, name, desc, req, true, v),
+  _value( val ),
+  _default( val ),
+  _typeDesc( typeDesc ),
+  _constraint( NULL )
+{ }
+
+template<class T>
+ValueArg<T>::ValueArg(const std::string& flag, 
+                      const std::string& name, 
+                      const std::string& desc, 
+                      bool req, 
+                      T val,
+                      const std::string& typeDesc,
+                      CmdLineInterface& parser,
+                      Visitor* v)
+: Arg(flag, name, desc, req, true, v),
+  _value( val ),
+  _default( val ),
+  _typeDesc( typeDesc ),
+  _constraint( NULL )
+{ 
+    parser.add( this );
+}
+
+template<class T>
+ValueArg<T>::ValueArg(const std::string& flag, 
+                      const std::string& name, 
+                      const std::string& desc, 
+                      bool req, 
+                      T val,
+                      Constraint<T>* constraint,
+                      Visitor* v)
+: Arg(flag, name, desc, req, true, v),
+  _value( val ),
+  _default( val ),
+  _typeDesc( constraint->shortID() ),
+  _constraint( constraint )
+{ }
+
+template<class T>
+ValueArg<T>::ValueArg(const std::string& flag, 
+                      const std::string& name, 
+                      const std::string& desc, 
+                      bool req, 
+                      T val,
+                      Constraint<T>* constraint,
+                      CmdLineInterface& parser,
+                      Visitor* v)
+: Arg(flag, name, desc, req, true, v),
+  _value( val ),
+  _default( val ),
+  _typeDesc( constraint->shortID() ),
+  _constraint( constraint )
+{ 
+    parser.add( this );
+}
+
+
+/**
+ * Implementation of getValue().
+ */
+template<class T>
+T& ValueArg<T>::getValue() { return _value; }
+
+/**
+ * Implementation of processArg().
+ */
+template<class T>
+bool ValueArg<T>::processArg(int *i, std::vector<std::string>& args)
+{
+    if ( _ignoreable && Arg::ignoreRest() )
+		return false;
+
+    if ( _hasBlanks( args[*i] ) )
+		return false;
+
+    std::string flag = args[*i];
+
+    std::string value = "";
+    trimFlag( flag, value );
+
+    if ( argMatches( flag ) )
+    {
+        if ( _alreadySet )
+		{
+			if ( _xorSet )
+				throw( CmdLineParseException(
+				       "Mutually exclusive argument already set!", 
+				                             toString()) );
+			else
+				throw( CmdLineParseException("Argument already set!", 
+				                             toString()) );
+		}
+
+        if ( Arg::delimiter() != ' ' && value == "" )
+			throw( ArgParseException( 
+							"Couldn't find delimiter for this argument!",
+                             toString() ) );
+
+        if ( value == "" )
+        {
+            (*i)++;
+            if ( static_cast<unsigned int>(*i) < args.size() ) 
+				_extractValue( args[*i] );
+            else
+				throw( ArgParseException("Missing a value for this argument!",
+                                                    toString() ) );
+        }
+        else
+			_extractValue( value );
+				
+        _alreadySet = true;
+        _checkWithVisitor();
+        return true;
+    }	
+    else
+		return false;
+}
+
+/**
+ * Implementation of shortID.
+ */
+template<class T>
+std::string ValueArg<T>::shortID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return Arg::shortID( _typeDesc ); 
+}
+
+/**
+ * Implementation of longID.
+ */
+template<class T>
+std::string ValueArg<T>::longID(const std::string& val) const
+{
+	static_cast<void>(val); // Ignore input, don't warn
+	return Arg::longID( _typeDesc ); 
+}
+
+template<class T>
+void ValueArg<T>::_extractValue( const std::string& val ) 
+{
+    try {
+	ExtractValue(_value, val, typename ArgTraits<T>::ValueCategory());
+    } catch( ArgParseException &e) {
+	throw ArgParseException(e.error(), toString());
+    }
+    
+    if ( _constraint != NULL )
+	if ( ! _constraint->check( _value ) )
+	    throw( CmdLineParseException( "Value '" + val + 
+					  + "' does not meet constraint: " 
+					  + _constraint->description(),
+					  toString() ) );
+}
+
+template<class T>
+void ValueArg<T>::reset()
+{
+	Arg::reset();
+	_value = _default;
+}
+
+} // namespace TCLAP
+
+#endif

components/mkspiffs/src/tclap/ValuesConstraint.h

@@ -0,0 +1,148 @@
+
+
+/****************************************************************************** 
+ * 
+ *  file:  ValuesConstraint.h
+ * 
+ *  Copyright (c) 2005, Michael E. Smoot
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_VALUESCONSTRAINT_H
+#define TCLAP_VALUESCONSTRAINT_H
+
+#include <string>
+#include <vector>
+#include "Constraint.h"
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#else
+#define HAVE_SSTREAM
+#endif
+
+#if defined(HAVE_SSTREAM)
+#include <sstream>
+#elif defined(HAVE_STRSTREAM)
+#include <strstream>
+#else
+#error "Need a stringstream (sstream or strstream) to compile!"
+#endif
+
+namespace TCLAP {
+
+/**
+ * A Constraint that constrains the Arg to only those values specified
+ * in the constraint.
+ */
+template<class T>
+class ValuesConstraint : public Constraint<T>
+{
+
+	public:
+
+		/**
+		 * Constructor. 
+		 * \param allowed - vector of allowed values. 
+		 */
+		ValuesConstraint(std::vector<T>& allowed);	
+
+		/**
+		 * Virtual destructor.
+		 */
+		virtual ~ValuesConstraint() {}
+
+		/**
+		 * Returns a description of the Constraint. 
+		 */
+		virtual std::string description() const;
+
+		/**
+		 * Returns the short ID for the Constraint.
+		 */
+		virtual std::string shortID() const;
+
+		/**
+		 * The method used to verify that the value parsed from the command
+		 * line meets the constraint.
+		 * \param value - The value that will be checked. 
+		 */
+		virtual bool check(const T& value) const;
+	
+	protected:
+
+		/**
+		 * The list of valid values. 
+		 */
+		std::vector<T> _allowed;
+
+		/**
+		 * The string used to describe the allowed values of this constraint.
+		 */
+		std::string _typeDesc;
+
+};
+
+template<class T>
+ValuesConstraint<T>::ValuesConstraint(std::vector<T>& allowed)
+: _allowed(allowed),
+  _typeDesc("")
+{ 
+    for ( unsigned int i = 0; i < _allowed.size(); i++ )
+    {
+
+#if defined(HAVE_SSTREAM)
+        std::ostringstream os;
+#elif defined(HAVE_STRSTREAM)
+        std::ostrstream os;
+#else
+#error "Need a stringstream (sstream or strstream) to compile!"
+#endif
+
+        os << _allowed[i];
+
+        std::string temp( os.str() ); 
+
+        if ( i > 0 )
+			_typeDesc += "|";
+        _typeDesc += temp;
+    }
+}
+
+template<class T>
+bool ValuesConstraint<T>::check( const T& val ) const
+{
+	if ( std::find(_allowed.begin(),_allowed.end(),val) == _allowed.end() )
+		return false;
+	else 
+		return true;
+}
+
+template<class T>
+std::string ValuesConstraint<T>::shortID() const
+{
+    return _typeDesc;	
+}
+
+template<class T>
+std::string ValuesConstraint<T>::description() const
+{
+    return _typeDesc;	
+}
+
+
+} //namespace TCLAP
+#endif 
+

components/mkspiffs/src/tclap/VersionVisitor.h

@@ -0,0 +1,81 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/****************************************************************************** 
+ * 
+ *  file:  VersionVisitor.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_VERSION_VISITOR_H
+#define TCLAP_VERSION_VISITOR_H
+
+#include "CmdLineInterface.h"
+#include "CmdLineOutput.h"
+#include "Visitor.h"
+
+namespace TCLAP {
+
+/**
+ * A Vistor that will call the version method of the given CmdLineOutput
+ * for the specified CmdLine object and then exit.
+ */
+class VersionVisitor: public Visitor
+{
+	private:
+		/**
+		 * Prevent accidental copying
+		 */
+		VersionVisitor(const VersionVisitor& rhs);
+		VersionVisitor& operator=(const VersionVisitor& rhs);
+
+	protected:
+
+		/**
+		 * The CmdLine of interest.
+		 */
+		CmdLineInterface* _cmd;
+
+		/**
+		 * The output object. 
+		 */
+		CmdLineOutput** _out;
+
+	public:
+
+		/**
+		 * Constructor.
+		 * \param cmd - The CmdLine the output is generated for. 
+		 * \param out - The type of output. 
+		 */
+		VersionVisitor( CmdLineInterface* cmd, CmdLineOutput** out ) 
+				: Visitor(), _cmd( cmd ), _out( out ) { }
+
+		/**
+		 * Calls the version method of the output object using the
+		 * specified CmdLine.
+		 */
+		void visit() { 
+		    (*_out)->version(*_cmd); 
+		    throw ExitException(0); 
+		}
+
+};
+
+}
+
+#endif

components/mkspiffs/src/tclap/Visitor.h

@@ -0,0 +1,53 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  Visitor.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+
+#ifndef TCLAP_VISITOR_H
+#define TCLAP_VISITOR_H
+
+namespace TCLAP {
+
+/**
+ * A base class that defines the interface for visitors.
+ */
+class Visitor
+{
+	public:
+
+		/**
+		 * Constructor. Does nothing.
+		 */
+		Visitor() { }
+
+		/**
+		 * Destructor. Does nothing.
+		 */
+		virtual ~Visitor() { }
+
+		/**
+		 * Does nothing. Should be overridden by child.
+		 */
+		virtual void visit() { }
+};
+
+}
+
+#endif

components/mkspiffs/src/tclap/XorHandler.h

@@ -0,0 +1,166 @@
+
+/****************************************************************************** 
+ * 
+ *  file:  XorHandler.h
+ * 
+ *  Copyright (c) 2003, Michael E. Smoot .
+ *  Copyright (c) 2004, Michael E. Smoot, Daniel Aarno.
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.  
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_XORHANDLER_H
+#define TCLAP_XORHANDLER_H
+
+#include "Arg.h"
+#include <string>
+#include <vector>
+#include <algorithm>
+#include <iostream>
+
+namespace TCLAP {
+
+/**
+ * This class handles lists of Arg's that are to be XOR'd on the command
+ * line.  This is used by CmdLine and you shouldn't ever use it.
+ */
+class XorHandler
+{
+	protected:
+
+		/**
+		 * The list of of lists of Arg's to be or'd together.
+		 */
+		std::vector< std::vector<Arg*> > _orList;
+
+	public:
+
+		/**
+		 * Constructor.  Does nothing.
+		 */
+		XorHandler( ) : _orList(std::vector< std::vector<Arg*> >()) {}
+
+		/**
+		 * Add a list of Arg*'s that will be orred together.
+		 * \param ors - list of Arg* that will be xor'd.
+		 */
+		void add( std::vector<Arg*>& ors );
+			
+		/**
+		 * Checks whether the specified Arg is in one of the xor lists and
+		 * if it does match one, returns the size of the xor list that the
+		 * Arg matched.  If the Arg matches, then it also sets the rest of
+		 * the Arg's in the list. You shouldn't use this.  
+		 * \param a - The Arg to be checked.
+		 */
+		int check( const Arg* a );
+
+		/**
+		 * Returns the XOR specific short usage.
+		 */
+		std::string shortUsage();
+
+		/**
+		 * Prints the XOR specific long usage.
+		 * \param os - Stream to print to.
+		 */
+		void printLongUsage(std::ostream& os);
+
+		/**
+		 * Simply checks whether the Arg is contained in one of the arg
+		 * lists.
+		 * \param a - The Arg to be checked.
+		 */
+		bool contains( const Arg* a );
+
+		std::vector< std::vector<Arg*> >& getXorList(); 
+
+};
+
+
+//////////////////////////////////////////////////////////////////////
+//BEGIN XOR.cpp
+//////////////////////////////////////////////////////////////////////
+inline void XorHandler::add( std::vector<Arg*>& ors )
+{ 
+	_orList.push_back( ors );
+}
+
+inline int XorHandler::check( const Arg* a ) 
+{
+	// iterate over each XOR list
+	for ( int i = 0; static_cast<unsigned int>(i) < _orList.size(); i++ )
+	{
+		// if the XOR list contains the arg..
+		ArgVectorIterator ait = std::find( _orList[i].begin(), 
+		                                   _orList[i].end(), a );
+		if ( ait != _orList[i].end() )
+		{
+			// first check to see if a mutually exclusive switch
+			// has not already been set
+			for ( ArgVectorIterator it = _orList[i].begin(); 
+				  it != _orList[i].end(); 
+				  it++ )
+				if ( a != (*it) && (*it)->isSet() )
+					throw(CmdLineParseException(
+					      "Mutually exclusive argument already set!",
+					      (*it)->toString()));
+
+			// go through and set each arg that is not a
+			for ( ArgVectorIterator it = _orList[i].begin(); 
+				  it != _orList[i].end(); 
+				  it++ )
+				if ( a != (*it) )
+					(*it)->xorSet();
+
+			// return the number of required args that have now been set
+			if ( (*ait)->allowMore() )
+				return 0;
+			else
+				return static_cast<int>(_orList[i].size());
+		}
+	}
+
+	if ( a->isRequired() )
+		return 1;
+	else
+		return 0;
+}
+
+inline bool XorHandler::contains( const Arg* a )
+{
+	for ( int i = 0; static_cast<unsigned int>(i) < _orList.size(); i++ )
+		for ( ArgVectorIterator it = _orList[i].begin(); 
+			  it != _orList[i].end(); 
+			  it++ )	
+			if ( a == (*it) )
+				return true;
+
+	return false;
+}
+
+inline std::vector< std::vector<Arg*> >& XorHandler::getXorList() 
+{
+	return _orList;
+}
+
+
+
+//////////////////////////////////////////////////////////////////////
+//END XOR.cpp
+//////////////////////////////////////////////////////////////////////
+
+} //namespace TCLAP
+
+#endif 

components/mkspiffs/src/tclap/ZshCompletionOutput.h

@@ -0,0 +1,323 @@
+// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-
+
+/****************************************************************************** 
+ * 
+ *  file:  ZshCompletionOutput.h
+ * 
+ *  Copyright (c) 2006, Oliver Kiddle
+ *  All rights reverved.
+ * 
+ *  See the file COPYING in the top directory of this distribution for
+ *  more information.
+ *  
+ *  THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 
+ *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ *  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ *  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ *  DEALINGS IN THE SOFTWARE.
+ *  
+ *****************************************************************************/ 
+
+#ifndef TCLAP_ZSHCOMPLETIONOUTPUT_H
+#define TCLAP_ZSHCOMPLETIONOUTPUT_H
+
+#include <string>
+#include <vector>
+#include <list>
+#include <iostream>
+#include <map>
+
+#include "CmdLineInterface.h"
+#include "CmdLineOutput.h"
+#include "XorHandler.h"
+#include "Arg.h"
+
+namespace TCLAP {
+
+/**
+ * A class that generates a Zsh completion function as output from the usage()
+ * method for the given CmdLine and its Args.
+ */
+class ZshCompletionOutput : public CmdLineOutput
+{
+
+	public:
+
+		ZshCompletionOutput();
+
+		/**
+		 * Prints the usage to stdout.  Can be overridden to 
+		 * produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void usage(CmdLineInterface& c);
+
+		/**
+		 * Prints the version to stdout. Can be overridden 
+		 * to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 */
+		virtual void version(CmdLineInterface& c);
+
+		/**
+		 * Prints (to stderr) an error message, short usage 
+		 * Can be overridden to produce alternative behavior.
+		 * \param c - The CmdLine object the output is generated for. 
+		 * \param e - The ArgException that caused the failure. 
+		 */
+		virtual void failure(CmdLineInterface& c,
+						     ArgException& e );
+
+	protected:
+
+		void basename( std::string& s );
+		void quoteSpecialChars( std::string& s );
+
+		std::string getMutexList( CmdLineInterface& _cmd, Arg* a );
+		void printOption( Arg* it, std::string mutex );
+		void printArg( Arg* it );
+
+		std::map<std::string, std::string> common;
+		char theDelimiter;
+};
+
+ZshCompletionOutput::ZshCompletionOutput()
+: common(std::map<std::string, std::string>()),
+  theDelimiter('=')
+{
+	common["host"] = "_hosts";
+	common["hostname"] = "_hosts";
+	common["file"] = "_files";
+	common["filename"] = "_files";
+	common["user"] = "_users";
+	common["username"] = "_users";
+	common["directory"] = "_directories";
+	common["path"] = "_directories";
+	common["url"] = "_urls";
+}
+
+inline void ZshCompletionOutput::version(CmdLineInterface& _cmd)
+{
+	std::cout << _cmd.getVersion() << std::endl;
+}
+
+inline void ZshCompletionOutput::usage(CmdLineInterface& _cmd )
+{
+	std::list<Arg*> argList = _cmd.getArgList();
+	std::string progName = _cmd.getProgramName();
+	std::string xversion = _cmd.getVersion();
+	theDelimiter = _cmd.getDelimiter();
+	basename(progName);
+
+	std::cout << "#compdef " << progName << std::endl << std::endl <<
+		"# " << progName << " version " << _cmd.getVersion() << std::endl << std::endl <<
+		"_arguments -s -S";
+
+	for (ArgListIterator it = argList.begin(); it != argList.end(); it++)
+	{
+		if ( (*it)->shortID().at(0) == '<' )
+			printArg((*it));
+		else if ( (*it)->getFlag() != "-" )
+			printOption((*it), getMutexList(_cmd, *it));
+	}
+
+	std::cout << std::endl;
+}
+
+inline void ZshCompletionOutput::failure( CmdLineInterface& _cmd,
+				                ArgException& e )
+{
+	static_cast<void>(_cmd); // unused
+	std::cout << e.what() << std::endl;
+}
+
+inline void ZshCompletionOutput::quoteSpecialChars( std::string& s )
+{
+	size_t idx = s.find_last_of(':');
+	while ( idx != std::string::npos )
+	{
+		s.insert(idx, 1, '\\');
+		idx = s.find_last_of(':', idx);
+	}
+	idx = s.find_last_of('\'');
+	while ( idx != std::string::npos )
+	{
+		s.insert(idx, "'\\'");
+		if (idx == 0)
+			idx = std::string::npos;
+		else
+			idx = s.find_last_of('\'', --idx);
+	}
+}
+
+inline void ZshCompletionOutput::basename( std::string& s )
+{
+	size_t p = s.find_last_of('/');
+	if ( p != std::string::npos )
+	{
+		s.erase(0, p + 1);
+	}
+}
+
+inline void ZshCompletionOutput::printArg(Arg* a)
+{
+	static int count = 1;
+
+	std::cout << " \\" << std::endl << "  '";
+	if ( a->acceptsMultipleValues() )
+		std::cout << '*';
+	else
+		std::cout << count++;
+	std::cout << ':';
+	if ( !a->isRequired() )
+		std::cout << ':';
+
+	std::cout << a->getName() << ':';
+	std::map<std::string, std::string>::iterator compArg = common.find(a->getName());
+	if ( compArg != common.end() )
+	{
+		std::cout << compArg->second;
+	}
+	else
+	{
+		std::cout << "_guard \"^-*\" " << a->getName();
+	}
+	std::cout << '\'';
+}
+
+inline void ZshCompletionOutput::printOption(Arg* a, std::string mutex)
+{
+	std::string flag = a->flagStartChar() + a->getFlag();
+	std::string name = a->nameStartString() + a->getName();
+	std::string desc = a->getDescription();
+
+	// remove full stop and capitalisation from description as
+	// this is the convention for zsh function
+	if (!desc.compare(0, 12, "(required)  "))
+	{
+		desc.erase(0, 12);
+	}
+	if (!desc.compare(0, 15, "(OR required)  "))
+	{
+		desc.erase(0, 15);
+	}
+	size_t len = desc.length();
+	if (len && desc.at(--len) == '.')
+	{
+		desc.erase(len);
+	}
+	if (len)
+	{
+		desc.replace(0, 1, 1, tolower(desc.at(0)));
+	}
+
+	std::cout << " \\" << std::endl << "  '" << mutex;
+
+	if ( a->getFlag().empty() )
+	{
+		std::cout << name;
+	}
+	else
+	{
+		std::cout << "'{" << flag << ',' << name << "}'";
+	}
+	if ( theDelimiter == '=' && a->isValueRequired() )
+		std::cout << "=-";
+	quoteSpecialChars(desc);
+	std::cout << '[' << desc << ']';
+
+	if ( a->isValueRequired() )
+	{
+		std::string arg = a->shortID();
+		arg.erase(0, arg.find_last_of(theDelimiter) + 1);
+		if ( arg.at(arg.length()-1) == ']' )
+			arg.erase(arg.length()-1);
+		if ( arg.at(arg.length()-1) == ']' )
+		{
+			arg.erase(arg.length()-1);
+		}
+		if ( arg.at(0) == '<' )
+		{
+			arg.erase(arg.length()-1);
+			arg.erase(0, 1);
+		}
+		size_t p = arg.find('|');
+		if ( p != std::string::npos )
+		{
+			do
+			{
+				arg.replace(p, 1, 1, ' ');
+			}
+			while ( (p = arg.find_first_of('|', p)) != std::string::npos );
+			quoteSpecialChars(arg);
+			std::cout << ": :(" << arg << ')';
+		}
+		else
+		{
+			std::cout << ':' << arg;
+			std::map<std::string, std::string>::iterator compArg = common.find(arg);
+			if ( compArg != common.end() )
+			{
+				std::cout << ':' << compArg->second;
+			}
+		}
+	}
+
+	std::cout << '\'';
+}
+
+inline std::string ZshCompletionOutput::getMutexList( CmdLineInterface& _cmd, Arg* a)
+{
+	XorHandler xorHandler = _cmd.getXorHandler();
+	std::vector< std::vector<Arg*> > xorList = xorHandler.getXorList();
+	
+	if (a->getName() == "help" || a->getName() == "version")
+	{
+		return "(-)";
+	}
+
+	std::ostringstream list;
+	if ( a->acceptsMultipleValues() )
+	{
+		list << '*';
+	}
+
+	for ( int i = 0; static_cast<unsigned int>(i) < xorList.size(); i++ )
+	{
+		for ( ArgVectorIterator it = xorList[i].begin();
+			it != xorList[i].end();
+			it++)
+		if ( a == (*it) )
+		{
+			list << '(';
+			for ( ArgVectorIterator iu = xorList[i].begin();
+				iu != xorList[i].end();
+				iu++ )
+			{
+				bool notCur = (*iu) != a;
+				bool hasFlag = !(*iu)->getFlag().empty();
+				if ( iu != xorList[i].begin() && (notCur || hasFlag) )
+					list << ' ';
+				if (hasFlag)
+					list << (*iu)->flagStartChar() << (*iu)->getFlag() << ' ';
+				if ( notCur || hasFlag )
+					list << (*iu)->nameStartString() << (*iu)->getName();
+			}
+			list << ')';
+			return list.str();
+		}
+	}
+	
+	// wasn't found in xor list
+	if (!a->getFlag().empty()) {
+		list << "(" << a->flagStartChar() << a->getFlag() << ' ' <<
+			a->nameStartString() << a->getName() << ')';
+	}
+	
+	return list.str();
+}
+
+} //namespace TCLAP
+#endif