/* Arduino SdFat Library
* Copyright (C) 2012 by William Greiman
*
* This file is part of the Arduino SdFat Library
*
* This Library is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This Library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with the Arduino SdFat Library. If not, see
* .
*/
#ifndef SdBaseFile_h
#define SdBaseFile_h
/**
* \file
* \brief SdBaseFile class
*/
#ifdef __AVR__
#include
#else // __AVR__
#ifndef PGM_P
/** pointer to flash for ARM */
#define PGM_P const char*
#endif // PGM_P
#ifndef PSTR
/** store literal string in flash for ARM */
#define PSTR(x) (x)
#endif // PSTR
#ifndef pgm_read_byte
/** read 8-bits from flash for ARM */
#define pgm_read_byte(addr) (*(const unsigned char*)(addr))
#endif // pgm_read_byte
#ifndef pgm_read_word
/** read 16-bits from flash for ARM */
#define pgm_read_word(addr) (*(const uint16_t*)(addr))
#endif // pgm_read_word
#ifndef PROGMEM
/** store in flash for ARM */
#define PROGMEM const
#endif // PROGMEM
#endif // __AVR__
#include
#include
#include
//------------------------------------------------------------------------------
/**
* \struct FatPos_t
* \brief internal type for istream
* do not use in user apps
*/
struct FatPos_t {
/** stream position */
uint32_t position;
/** cluster for position */
uint32_t cluster;
FatPos_t() : position(0), cluster(0) {}
};
// use the gnu style oflag in open()
/** open() oflag for reading */
uint8_t const O_READ = 0X01;
/** open() oflag - same as O_IN */
uint8_t const O_RDONLY = O_READ;
/** open() oflag for write */
uint8_t const O_WRITE = 0X02;
/** open() oflag - same as O_WRITE */
uint8_t const O_WRONLY = O_WRITE;
/** open() oflag for reading and writing */
uint8_t const O_RDWR = (O_READ | O_WRITE);
/** open() oflag mask for access modes */
uint8_t const O_ACCMODE = (O_READ | O_WRITE);
/** The file offset shall be set to the end of the file prior to each write. */
uint8_t const O_APPEND = 0X04;
/** synchronous writes - call sync() after each write */
uint8_t const O_SYNC = 0X08;
/** truncate the file to zero length */
uint8_t const O_TRUNC = 0X10;
/** set the initial position at the end of the file */
uint8_t const O_AT_END = 0X20;
/** create the file if nonexistent */
uint8_t const O_CREAT = 0X40;
/** If O_CREAT and O_EXCL are set, open() shall fail if the file exists */
uint8_t const O_EXCL = 0X80;
// SdBaseFile class static and const definitions
// flags for ls()
/** ls() flag to print modify date */
uint8_t const LS_DATE = 1;
/** ls() flag to print file size */
uint8_t const LS_SIZE = 2;
/** ls() flag for recursive list of subdirectories */
uint8_t const LS_R = 4;
// flags for timestamp
/** set the file's last access date */
uint8_t const T_ACCESS = 1;
/** set the file's creation date and time */
uint8_t const T_CREATE = 2;
/** Set the file's write date and time */
uint8_t const T_WRITE = 4;
// values for m_type
/** This file has not been opened. */
uint8_t const FAT_FILE_TYPE_CLOSED = 0;
/** A normal file */
uint8_t const FAT_FILE_TYPE_NORMAL = 1;
/** A FAT12 or FAT16 root directory */
uint8_t const FAT_FILE_TYPE_ROOT_FIXED = 2;
/** A FAT32 root directory */
uint8_t const FAT_FILE_TYPE_ROOT32 = 3;
/** A subdirectory file*/
uint8_t const FAT_FILE_TYPE_SUBDIR = 4;
/** Test value for directory type */
uint8_t const FAT_FILE_TYPE_MIN_DIR = FAT_FILE_TYPE_ROOT_FIXED;
/** date field for FAT directory entry
* \param[in] year [1980,2107]
* \param[in] month [1,12]
* \param[in] day [1,31]
*
* \return Packed date for dir_t entry.
*/
static inline uint16_t FAT_DATE(uint16_t year, uint8_t month, uint8_t day) {
return (year - 1980) << 9 | month << 5 | day;
}
/** year part of FAT directory date field
* \param[in] fatDate Date in packed dir format.
*
* \return Extracted year [1980,2107]
*/
static inline uint16_t FAT_YEAR(uint16_t fatDate) {
return 1980 + (fatDate >> 9);
}
/** month part of FAT directory date field
* \param[in] fatDate Date in packed dir format.
*
* \return Extracted month [1,12]
*/
static inline uint8_t FAT_MONTH(uint16_t fatDate) {
return (fatDate >> 5) & 0XF;
}
/** day part of FAT directory date field
* \param[in] fatDate Date in packed dir format.
*
* \return Extracted day [1,31]
*/
static inline uint8_t FAT_DAY(uint16_t fatDate) {
return fatDate & 0X1F;
}
/** time field for FAT directory entry
* \param[in] hour [0,23]
* \param[in] minute [0,59]
* \param[in] second [0,59]
*
* \return Packed time for dir_t entry.
*/
static inline uint16_t FAT_TIME(uint8_t hour, uint8_t minute, uint8_t second) {
return hour << 11 | minute << 5 | second >> 1;
}
/** hour part of FAT directory time field
* \param[in] fatTime Time in packed dir format.
*
* \return Extracted hour [0,23]
*/
static inline uint8_t FAT_HOUR(uint16_t fatTime) {
return fatTime >> 11;
}
/** minute part of FAT directory time field
* \param[in] fatTime Time in packed dir format.
*
* \return Extracted minute [0,59]
*/
static inline uint8_t FAT_MINUTE(uint16_t fatTime) {
return(fatTime >> 5) & 0X3F;
}
/** second part of FAT directory time field
* Note second/2 is stored in packed time.
*
* \param[in] fatTime Time in packed dir format.
*
* \return Extracted second [0,58]
*/
static inline uint8_t FAT_SECOND(uint16_t fatTime) {
return 2*(fatTime & 0X1F);
}
/** Default date for file timestamps is 1 Jan 2000 */
uint16_t const FAT_DEFAULT_DATE = ((2000 - 1980) << 9) | (1 << 5) | 1;
/** Default time for file timestamp is 1 am */
uint16_t const FAT_DEFAULT_TIME = (1 << 11);
//------------------------------------------------------------------------------
/**
* \class SdBaseFile
* \brief Base class for SdFile with Print and C++ streams.
*/
class SdBaseFile {
public:
/** Create an instance. */
SdBaseFile() : writeError(false), m_type(FAT_FILE_TYPE_CLOSED) {}
SdBaseFile(const char* path, uint8_t oflag);
#if DESTRUCTOR_CLOSES_FILE
~SdBaseFile() {if(isOpen()) close();}
#endif // DESTRUCTOR_CLOSES_FILE
/**
* writeError is set to true if an error occurs during a write().
* Set writeError to false before calling print() and/or write() and check
* for true after calls to print() and/or write().
*/
bool writeError;
/** \return value of writeError */
bool getWriteError() {return writeError;}
/** Set writeError to zero */
void clearWriteError() {writeError = 0;}
//----------------------------------------------------------------------------
// helpers for stream classes
/** get position for streams
* \param[out] pos struct to receive position
*/
void getpos(FatPos_t* pos);
/** set position for streams
* \param[out] pos struct with value for new position
*/
void setpos(FatPos_t* pos);
//----------------------------------------------------------------------------
/** \return number of bytes available from yhe current position to EOF */
uint32_t available() {return fileSize() - curPosition();}
bool close();
bool contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock);
bool createContiguous(SdBaseFile* dirFile,
const char* path, uint32_t size);
/** \return The current cluster number for a file or directory. */
uint32_t curCluster() const {return m_curCluster;}
/** \return The current position for a file or directory. */
uint32_t curPosition() const {return m_curPosition;}
/** \return Current working directory */
static SdBaseFile* cwd() {return m_cwd;}
/** Set the date/time callback function
*
* \param[in] dateTime The user's call back function. The callback
* function is of the form:
*
* \code
* void dateTime(uint16_t* date, uint16_t* time) {
* uint16_t year;
* uint8_t month, day, hour, minute, second;
*
* // User gets date and time from GPS or real-time clock here
*
* // return date using FAT_DATE macro to format fields
* *date = FAT_DATE(year, month, day);
*
* // return time using FAT_TIME macro to format fields
* *time = FAT_TIME(hour, minute, second);
* }
* \endcode
*
* Sets the function that is called when a file is created or when
* a file's directory entry is modified by sync(). All timestamps,
* access, creation, and modify, are set when a file is created.
* sync() maintains the last access date and last modify date/time.
*
* See the timestamp() function.
*/
static void dateTimeCallback(
void (*dateTime)(uint16_t* date, uint16_t* time)) {
m_dateTime = dateTime;
}
/** Cancel the date/time callback function. */
static void dateTimeCallbackCancel() {m_dateTime = 0;}
bool dirEntry(dir_t* dir);
static void dirName(const dir_t& dir, char* name);
bool exists(const char* name);
int16_t fgets(char* str, int16_t num, char* delim = 0);
/** \return The total number of bytes in a file or directory. */
uint32_t fileSize() const {return m_fileSize;}
/** \return The first cluster number for a file or directory. */
uint32_t firstCluster() const {return m_firstCluster;}
bool getFilename(char* name);
/** \return True if this is a directory else false. */
bool isDir() const {return m_type >= FAT_FILE_TYPE_MIN_DIR;}
/** \return True if this is a normal file else false. */
bool isFile() const {return m_type == FAT_FILE_TYPE_NORMAL;}
/** \return True if this is an open file/directory else false. */
bool isOpen() const {return m_type != FAT_FILE_TYPE_CLOSED;}
/** \return True if this is a subdirectory else false. */
bool isSubDir() const {return m_type == FAT_FILE_TYPE_SUBDIR;}
/** \return True if this is the root directory. */
bool isRoot() const {
return m_type == FAT_FILE_TYPE_ROOT_FIXED || m_type == FAT_FILE_TYPE_ROOT32;
}
void ls(Print* pr, uint8_t flags = 0, uint8_t indent = 0);
void ls(uint8_t flags = 0);
bool mkdir(SdBaseFile* dir, const char* path, bool pFlag = true);
// alias for backward compactability
bool makeDir(SdBaseFile* dir, const char* path) {
return mkdir(dir, path, false);
}
bool open(SdBaseFile* dirFile, uint16_t index, uint8_t oflag);
bool open(SdBaseFile* dirFile, const char* path, uint8_t oflag);
bool open(const char* path, uint8_t oflag = O_READ);
bool openNext(SdBaseFile* dirFile, uint8_t oflag);
bool openRoot(SdVolume* vol);
int peek();
bool printCreateDateTime(Print* pr);
static void printFatDate(uint16_t fatDate);
static void printFatDate(Print* pr, uint16_t fatDate);
static void printFatTime(uint16_t fatTime);
static void printFatTime(Print* pr, uint16_t fatTime);
int printField(int16_t value, char term);
int printField(uint16_t value, char term);
int printField(int32_t value, char term);
int printField(uint32_t value, char term);
bool printModifyDateTime(Print* pr);
bool printName();
bool printName(Print* pr);
int16_t read();
int read(void* buf, size_t nbyte);
int8_t readDir(dir_t* dir);
static bool remove(SdBaseFile* dirFile, const char* path);
bool remove();
/** Set the file's current position to zero. */
void rewind() {seekSet(0);}
bool rename(SdBaseFile* dirFile, const char* newPath);
bool rmdir();
// for backward compatibility
bool rmDir() {return rmdir();}
bool rmRfStar();
/** Set the files position to current position + \a pos. See seekSet().
* \param[in] offset The new position in bytes from the current position.
* \return true for success or false for failure.
*/
bool seekCur(int32_t offset) {
return seekSet(m_curPosition + offset);
}
/** Set the files position to end-of-file + \a offset. See seekSet().
* \param[in] offset The new position in bytes from end-of-file.
* \return true for success or false for failure.
*/
bool seekEnd(int32_t offset = 0) {return seekSet(m_fileSize + offset);}
bool seekSet(uint32_t pos);
bool sync();
bool timestamp(SdBaseFile* file);
bool timestamp(uint8_t flag, uint16_t year, uint8_t month, uint8_t day,
uint8_t hour, uint8_t minute, uint8_t second);
/** Type of file. You should use isFile() or isDir() instead of type()
* if possible.
*
* \return The file or directory type.
*/
uint8_t type() const {return m_type;}
bool truncate(uint32_t size);
/** \return SdVolume that contains this file. */
SdVolume* volume() const {return m_vol;}
int write(const void* buf, size_t nbyte);
//------------------------------------------------------------------------------
private:
// allow SdFat to set m_cwd
friend class SdFat;
/** experimental don't use */
bool openParent(SdBaseFile* dir);
// private functions
bool addCluster();
cache_t* addDirCluster();
dir_t* cacheDirEntry(uint8_t action);
int8_t lsPrintNext(Print *pr, uint8_t flags, uint8_t indent);
static bool make83Name(const char* str, uint8_t* name, const char** ptr);
bool mkdir(SdBaseFile* parent, const uint8_t dname[11]);
bool open(SdBaseFile* dirFile, const uint8_t dname[11], uint8_t oflag);
bool openCachedEntry(uint8_t cacheIndex, uint8_t oflags);
dir_t* readDirCache();
static void setCwd(SdBaseFile* cwd) {m_cwd = cwd;}
bool setDirSize();
// bits defined in m_flags
// should be 0X0F
static uint8_t const F_OFLAG = (O_ACCMODE | O_APPEND | O_SYNC);
// sync of directory entry required
static uint8_t const F_FILE_DIR_DIRTY = 0X80;
// global pointer to cwd dir
static SdBaseFile* m_cwd;
// data time callback function
static void (*m_dateTime)(uint16_t* date, uint16_t* time);
// private data
uint8_t m_flags; // See above for definition of m_flags bits
uint8_t m_type; // type of file see above for values
uint8_t m_dirIndex; // index of directory entry in dirBlock
SdVolume* m_vol; // volume where file is located
uint32_t m_curCluster; // cluster for current file position
uint32_t m_curPosition; // current file position in bytes from beginning
uint32_t m_dirBlock; // block for this files directory entry
uint32_t m_fileSize; // file size in bytes
uint32_t m_firstCluster; // first cluster of file
};
#endif // SdBaseFile_h