333 lines
10 KiB
C++
333 lines
10 KiB
C++
/**
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* Copyright (c) 2011-2018 Bill Greiman
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* This file is part of the SdFat library for SD memory cards.
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*
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* MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef FatFileSystem_h
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#define FatFileSystem_h
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#include "FatVolume.h"
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#include "FatFile.h"
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#include "ArduinoFiles.h"
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/**
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* \file
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* \brief FatFileSystem class
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*/
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//------------------------------------------------------------------------------
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/**
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* \class FatFileSystem
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* \brief Integration class for the FatLib library.
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*/
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class FatFileSystem : public FatVolume {
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public:
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/**
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* Initialize an FatFileSystem object.
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* \param[in] blockDev Device block driver.
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* \param[in] part partition to initialize.
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool begin(BlockDriver* blockDev, uint8_t part = 0) {
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m_blockDev = blockDev;
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vwd()->close();
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return (part ? init(part) : init(1) || init(0))
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&& vwd()->openRoot(this) && FatFile::setCwd(vwd());
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}
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#if ENABLE_ARDUINO_FEATURES
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/** List the directory contents of the volume working directory to Serial.
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*
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* \param[in] flags The inclusive OR of
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*
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* LS_DATE - %Print file modification date
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*
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* LS_SIZE - %Print file size.
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*
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* LS_R - Recursive list of subdirectories.
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*
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* \return true for success or false if an error occurred.
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*/
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bool ls(uint8_t flags = 0) {
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return ls(&Serial, flags);
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}
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/** List the directory contents of a directory to Serial.
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*
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* \param[in] path directory to list.
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*
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* \param[in] flags The inclusive OR of
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*
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* LS_DATE - %Print file modification date
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*
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* LS_SIZE - %Print file size.
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*
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* LS_R - Recursive list of subdirectories.
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*
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* \return true for success or false if an error occurred.
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*/
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bool ls(const char* path, uint8_t flags = 0) {
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return ls(&Serial, path, flags);
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}
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/** open a file
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*
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* \param[in] path location of file to be opened.
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* \param[in] oflag open flags.
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* \return a File object.
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*/
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File open(const char *path, oflag_t oflag = FILE_READ) {
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File tmpFile;
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tmpFile.open(vwd(), path, oflag);
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return tmpFile;
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}
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/** open a file
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*
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* \param[in] path location of file to be opened.
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* \param[in] oflag open flags.
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* \return a File object.
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*/
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File open(const String &path, oflag_t oflag = FILE_READ) {
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return open(path.c_str(), oflag );
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}
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#endif // ENABLE_ARDUINO_FEATURES
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/** Change a volume's working directory to root
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*
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* Changes the volume's working directory to the SD's root directory.
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* Optionally set the current working directory to the volume's
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* working directory.
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*
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* \param[in] set_cwd Set the current working directory to this volume's
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* working directory if true.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool chdir(bool set_cwd = false) {
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vwd()->close();
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return vwd()->openRoot(this) && (set_cwd ? FatFile::setCwd(vwd()) : true);
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}
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/** Change a volume's working directory
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*
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* Changes the volume working directory to the \a path subdirectory.
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* Optionally set the current working directory to the volume's
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* working directory.
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*
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* Example: If the volume's working directory is "/DIR", chdir("SUB")
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* will change the volume's working directory from "/DIR" to "/DIR/SUB".
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*
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* If path is "/", the volume's working directory will be changed to the
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* root directory
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*
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* \param[in] path The name of the subdirectory.
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*
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* \param[in] set_cwd Set the current working directory to this volume's
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* working directory if true.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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//----------------------------------------------------------------------------
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bool chdir(const char *path, bool set_cwd = false) {
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FatFile dir;
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if (path[0] == '/' && path[1] == '\0') {
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return chdir(set_cwd);
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}
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if (!dir.open(vwd(), path, O_RDONLY)) {
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goto fail;
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}
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if (!dir.isDir()) {
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goto fail;
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}
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m_vwd = dir;
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if (set_cwd) {
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FatFile::setCwd(vwd());
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}
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return true;
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fail:
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return false;
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}
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//----------------------------------------------------------------------------
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/** Set the current working directory to a volume's working directory.
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*
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* This is useful with multiple SD cards.
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*
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* The current working directory is changed to this
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* volume's working directory.
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*
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* This is like the Windows/DOS \<drive letter>: command.
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*/
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void chvol() {
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FatFile::setCwd(vwd());
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}
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//----------------------------------------------------------------------------
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/**
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* Test for the existence of a file.
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*
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* \param[in] path Path of the file to be tested for.
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*
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* \return true if the file exists else false.
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*/
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bool exists(const char* path) {
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return vwd()->exists(path);
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}
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//----------------------------------------------------------------------------
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/** List the directory contents of the volume working directory.
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*
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* \param[in] pr Print stream for list.
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*
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* \param[in] flags The inclusive OR of
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*
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* LS_DATE - %Print file modification date
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*
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* LS_SIZE - %Print file size.
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*
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* LS_R - Recursive list of subdirectories.
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*
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* \return true for success or false if an error occurred.
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*/
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bool ls(print_t* pr, uint8_t flags = 0) {
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return vwd()->ls(pr, flags);
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}
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//----------------------------------------------------------------------------
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/** List the directory contents of a directory.
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*
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* \param[in] pr Print stream for list.
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*
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* \param[in] path directory to list.
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*
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* \param[in] flags The inclusive OR of
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*
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* LS_DATE - %Print file modification date
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*
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* LS_SIZE - %Print file size.
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*
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* LS_R - Recursive list of subdirectories.
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*
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* \return true for success or false if an error occurred.
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*/
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bool ls(print_t* pr, const char* path, uint8_t flags) {
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FatFile dir;
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return dir.open(vwd(), path, O_RDONLY) && dir.ls(pr, flags);
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}
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//----------------------------------------------------------------------------
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/** Make a subdirectory in the volume working directory.
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*
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* \param[in] path A path with a valid 8.3 DOS name for the subdirectory.
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*
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* \param[in] pFlag Create missing parent directories if true.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool mkdir(const char* path, bool pFlag = true) {
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FatFile sub;
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return sub.mkdir(vwd(), path, pFlag);
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}
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//----------------------------------------------------------------------------
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/** Remove a file from the volume working directory.
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*
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* \param[in] path A path with a valid 8.3 DOS name for the file.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool remove(const char* path) {
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return FatFile::remove(vwd(), path);
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}
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//----------------------------------------------------------------------------
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/** Rename a file or subdirectory.
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*
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* \param[in] oldPath Path name to the file or subdirectory to be renamed.
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*
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* \param[in] newPath New path name of the file or subdirectory.
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*
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* The \a newPath object must not exist before the rename call.
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*
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* The file to be renamed must not be open. The directory entry may be
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* moved and file system corruption could occur if the file is accessed by
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* a file object that was opened before the rename() call.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool rename(const char *oldPath, const char *newPath) {
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FatFile file;
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if (!file.open(vwd(), oldPath, O_RDONLY)) {
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return false;
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}
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return file.rename(vwd(), newPath);
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}
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//----------------------------------------------------------------------------
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/** Remove a subdirectory from the volume's working directory.
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*
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* \param[in] path A path with a valid 8.3 DOS name for the subdirectory.
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*
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* The subdirectory file will be removed only if it is empty.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool rmdir(const char* path) {
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FatFile sub;
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if (!sub.open(vwd(), path, O_RDONLY)) {
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return false;
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}
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return sub.rmdir();
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}
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//----------------------------------------------------------------------------
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/** Truncate a file to a specified length. The current file position
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* will be maintained if it is less than or equal to \a length otherwise
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* it will be set to end of file.
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*
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* \param[in] path A path with a valid 8.3 DOS name for the file.
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* \param[in] length The desired length for the file.
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*
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* \return The value true is returned for success and
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* the value false is returned for failure.
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*/
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bool truncate(const char* path, uint32_t length) {
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FatFile file;
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if (!file.open(vwd(), path, O_WRONLY)) {
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return false;
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}
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return file.truncate(length);
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}
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/** \return a pointer to the FatVolume object. */
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FatVolume* vol() {
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return this;
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}
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/** \return a pointer to the volume working directory. */
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FatFile* vwd() {
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return &m_vwd;
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}
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/** Wipe all data from the volume. You must reinitialize the volume before
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* accessing it again.
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* \param[in] pr print stream for status dots.
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* \return true for success else false.
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*/
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bool wipe(print_t* pr = 0) {
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vwd()->close();
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return FatVolume::wipe(pr);
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}
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private:
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FatFile m_vwd;
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};
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#endif // FatFileSystem_h
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