Firmware2/Marlin/SdBaseFile.cpp
Blue-Marlin ac4caab8f1 Don't mangel 8.3-filenames with chars > 0x7f
Don't mangel 8.3-filenames with chars > 0x7f

Windows produces 8.3filenames wit chars > 0x7f. Those have been rejected
by Marlin until now.

With these 'malformed' filenames can now be worked with:
In the LCD menue
With RepetierHost (V1.6.1 tested) - full support. Characters are
displayed as '?'
With Octoprint (1.2.10 tested) the files do not appear in the files
area. At the console, listed with M20 they appear with a '�'.
With Pronterface the files appear in the sd-window but you can't start
them. They are mangled by pronterface. The names are altered and than
recected by Marlin. In the console they apper with differen but not the
correct characters.

All in all a little step forward.

Fix for #3593
2016-04-30 17:37:22 +02:00

1827 lines
55 KiB
C++

/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program 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 program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
/**
* Arduino SdFat Library
* Copyright (C) 2009 by William Greiman
*
* This file is part of the Arduino Sd2Card Library
*/
#include "Marlin.h"
#if ENABLED(SDSUPPORT)
#include "SdBaseFile.h"
//------------------------------------------------------------------------------
// pointer to cwd directory
SdBaseFile* SdBaseFile::cwd_ = 0;
// callback function for date/time
void (*SdBaseFile::dateTime_)(uint16_t* date, uint16_t* time) = 0;
//------------------------------------------------------------------------------
// add a cluster to a file
bool SdBaseFile::addCluster() {
if (!vol_->allocContiguous(1, &curCluster_)) goto fail;
// if first cluster of file link to directory entry
if (firstCluster_ == 0) {
firstCluster_ = curCluster_;
flags_ |= F_FILE_DIR_DIRTY;
}
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
// Add a cluster to a directory file and zero the cluster.
// return with first block of cluster in the cache
bool SdBaseFile::addDirCluster() {
uint32_t block;
// max folder size
if (fileSize_ / sizeof(dir_t) >= 0XFFFF) goto fail;
if (!addCluster()) goto fail;
if (!vol_->cacheFlush()) goto fail;
block = vol_->clusterStartBlock(curCluster_);
// set cache to first block of cluster
vol_->cacheSetBlockNumber(block, true);
// zero first block of cluster
memset(vol_->cacheBuffer_.data, 0, 512);
// zero rest of cluster
for (uint8_t i = 1; i < vol_->blocksPerCluster_; i++) {
if (!vol_->writeBlock(block + i, vol_->cacheBuffer_.data)) goto fail;
}
// Increase directory file size by cluster size
fileSize_ += 512UL << vol_->clusterSizeShift_;
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
// cache a file's directory entry
// return pointer to cached entry or null for failure
dir_t* SdBaseFile::cacheDirEntry(uint8_t action) {
if (!vol_->cacheRawBlock(dirBlock_, action)) goto fail;
return vol_->cache()->dir + dirIndex_;
fail:
return 0;
}
//------------------------------------------------------------------------------
/** Close a file and force cached data and directory information
* to be written to the storage device.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include no file is open or an I/O error.
*/
bool SdBaseFile::close() {
bool rtn = sync();
type_ = FAT_FILE_TYPE_CLOSED;
return rtn;
}
//------------------------------------------------------------------------------
/** Check for contiguous file and return its raw block range.
*
* \param[out] bgnBlock the first block address for the file.
* \param[out] endBlock the last block address for the file.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include file is not contiguous, file has zero length
* or an I/O error occurred.
*/
bool SdBaseFile::contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock) {
// error if no blocks
if (firstCluster_ == 0) goto fail;
for (uint32_t c = firstCluster_; ; c++) {
uint32_t next;
if (!vol_->fatGet(c, &next)) goto fail;
// check for contiguous
if (next != (c + 1)) {
// error if not end of chain
if (!vol_->isEOC(next)) goto fail;
*bgnBlock = vol_->clusterStartBlock(firstCluster_);
*endBlock = vol_->clusterStartBlock(c)
+ vol_->blocksPerCluster_ - 1;
return true;
}
}
fail:
return false;
}
//------------------------------------------------------------------------------
/** Create and open a new contiguous file of a specified size.
*
* \note This function only supports short DOS 8.3 names.
* See open() for more information.
*
* \param[in] dirFile The directory where the file will be created.
* \param[in] path A path with a valid DOS 8.3 file name.
* \param[in] size The desired file size.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include \a path contains
* an invalid DOS 8.3 file name, the FAT volume has not been initialized,
* a file is already open, the file already exists, the root
* directory is full or an I/O error.
*
*/
bool SdBaseFile::createContiguous(SdBaseFile* dirFile,
const char* path, uint32_t size) {
uint32_t count;
// don't allow zero length file
if (size == 0) goto fail;
if (!open(dirFile, path, O_CREAT | O_EXCL | O_RDWR)) goto fail;
// calculate number of clusters needed
count = ((size - 1) >> (vol_->clusterSizeShift_ + 9)) + 1;
// allocate clusters
if (!vol_->allocContiguous(count, &firstCluster_)) {
remove();
goto fail;
}
fileSize_ = size;
// insure sync() will update dir entry
flags_ |= F_FILE_DIR_DIRTY;
return sync();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Return a file's directory entry.
*
* \param[out] dir Location for return of the file's directory entry.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::dirEntry(dir_t* dir) {
dir_t* p;
// make sure fields on SD are correct
if (!sync()) goto fail;
// read entry
p = cacheDirEntry(SdVolume::CACHE_FOR_READ);
if (!p) goto fail;
// copy to caller's struct
memcpy(dir, p, sizeof(dir_t));
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
/** Format the name field of \a dir into the 13 byte array
* \a name in standard 8.3 short name format.
*
* \param[in] dir The directory structure containing the name.
* \param[out] name A 13 byte char array for the formatted name.
*/
void SdBaseFile::dirName(const dir_t& dir, char* name) {
uint8_t j = 0;
for (uint8_t i = 0; i < 11; i++) {
if (dir.name[i] == ' ')continue;
if (i == 8) name[j++] = '.';
name[j++] = dir.name[i];
}
name[j] = 0;
}
//------------------------------------------------------------------------------
/** Test for the existence of a file in a directory
*
* \param[in] name Name of the file to be tested for.
*
* The calling instance must be an open directory file.
*
* dirFile.exists("TOFIND.TXT") searches for "TOFIND.TXT" in the directory
* dirFile.
*
* \return true if the file exists else false.
*/
bool SdBaseFile::exists(const char* name) {
SdBaseFile file;
return file.open(this, name, O_READ);
}
//------------------------------------------------------------------------------
/**
* Get a string from a file.
*
* fgets() reads bytes from a file into the array pointed to by \a str, until
* \a num - 1 bytes are read, or a delimiter is read and transferred to \a str,
* or end-of-file is encountered. The string is then terminated
* with a null byte.
*
* fgets() deletes CR, '\\r', from the string. This insures only a '\\n'
* terminates the string for Windows text files which use CRLF for newline.
*
* \param[out] str Pointer to the array where the string is stored.
* \param[in] num Maximum number of characters to be read
* (including the final null byte). Usually the length
* of the array \a str is used.
* \param[in] delim Optional set of delimiters. The default is "\n".
*
* \return For success fgets() returns the length of the string in \a str.
* If no data is read, fgets() returns zero for EOF or -1 if an error occurred.
**/
int16_t SdBaseFile::fgets(char* str, int16_t num, char* delim) {
char ch;
int16_t n = 0;
int16_t r = -1;
while ((n + 1) < num && (r = read(&ch, 1)) == 1) {
// delete CR
if (ch == '\r') continue;
str[n++] = ch;
if (!delim) {
if (ch == '\n') break;
}
else {
if (strchr(delim, ch)) break;
}
}
if (r < 0) {
// read error
return -1;
}
str[n] = '\0';
return n;
}
//------------------------------------------------------------------------------
/** Get a file's name
*
* \param[out] name An array of 13 characters for the file's name.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::getFilename(char* name) {
if (!isOpen()) return false;
if (isRoot()) {
name[0] = '/';
name[1] = '\0';
return true;
}
// cache entry
dir_t* p = cacheDirEntry(SdVolume::CACHE_FOR_READ);
if (!p) return false;
// format name
dirName(*p, name);
return true;
}
//------------------------------------------------------------------------------
void SdBaseFile::getpos(filepos_t* pos) {
pos->position = curPosition_;
pos->cluster = curCluster_;
}
//------------------------------------------------------------------------------
/** List directory contents.
*
* \param[in] pr Print stream for list.
*
* \param[in] flags The inclusive OR of
*
* LS_DATE - %Print file modification date
*
* LS_SIZE - %Print file size.
*
* LS_R - Recursive list of subdirectories.
*
* \param[in] indent Amount of space before file name. Used for recursive
* list to indicate subdirectory level.
*/
void SdBaseFile::ls(uint8_t flags, uint8_t indent) {
rewind();
int8_t status;
while ((status = lsPrintNext(flags, indent))) {
if (status > 1 && (flags & LS_R)) {
uint16_t index = curPosition() / 32 - 1;
SdBaseFile s;
if (s.open(this, index, O_READ)) s.ls(flags, indent + 2);
seekSet(32 * (index + 1));
}
}
}
//------------------------------------------------------------------------------
// saves 32 bytes on stack for ls recursion
// return 0 - EOF, 1 - normal file, or 2 - directory
int8_t SdBaseFile::lsPrintNext(uint8_t flags, uint8_t indent) {
dir_t dir;
uint8_t w = 0;
while (1) {
if (read(&dir, sizeof(dir)) != sizeof(dir)) return 0;
if (dir.name[0] == DIR_NAME_FREE) return 0;
// skip deleted entry and entries for . and ..
if (dir.name[0] != DIR_NAME_DELETED && dir.name[0] != '.'
&& DIR_IS_FILE_OR_SUBDIR(&dir)) break;
}
// indent for dir level
for (uint8_t i = 0; i < indent; i++) MYSERIAL.write(' ');
// print name
for (uint8_t i = 0; i < 11; i++) {
if (dir.name[i] == ' ')continue;
if (i == 8) {
MYSERIAL.write('.');
w++;
}
MYSERIAL.write(dir.name[i]);
w++;
}
if (DIR_IS_SUBDIR(&dir)) {
MYSERIAL.write('/');
w++;
}
if (flags & (LS_DATE | LS_SIZE)) {
while (w++ < 14) MYSERIAL.write(' ');
}
// print modify date/time if requested
if (flags & LS_DATE) {
MYSERIAL.write(' ');
printFatDate(dir.lastWriteDate);
MYSERIAL.write(' ');
printFatTime(dir.lastWriteTime);
}
// print size if requested
if (!DIR_IS_SUBDIR(&dir) && (flags & LS_SIZE)) {
MYSERIAL.write(' ');
MYSERIAL.print(dir.fileSize);
}
MYSERIAL.println();
return DIR_IS_FILE(&dir) ? 1 : 2;
}
//------------------------------------------------------------------------------
// format directory name field from a 8.3 name string
bool SdBaseFile::make83Name(const char* str, uint8_t* name, const char** ptr) {
uint8_t c;
uint8_t n = 7; // max index for part before dot
uint8_t i = 0;
// blank fill name and extension
while (i < 11) name[i++] = ' ';
i = 0;
while (*str != '\0' && *str != '/') {
c = *str++;
if (c == '.') {
if (n == 10) goto fail; // only one dot allowed
n = 10; // max index for full 8.3 name
i = 8; // place for extension
}
else {
// illegal FAT characters
PGM_P p = PSTR("|<>^+=?/[];,*\"\\");
uint8_t b;
while ((b = pgm_read_byte(p++))) if (b == c) goto fail;
// check size and only allow ASCII printable characters
if (i > n || c < 0X21 || c == 0X7E)goto fail;
// only upper case allowed in 8.3 names - convert lower to upper
name[i++] = (c < 'a' || c > 'z') ? (c) : (c + ('A' - 'a'));
}
}
*ptr = str;
// must have a file name, extension is optional
return name[0] != ' ';
fail:
return false;
}
//------------------------------------------------------------------------------
/** Make a new directory.
*
* \param[in] parent An open SdFat instance for the directory that will contain
* the new directory.
*
* \param[in] path A path with a valid 8.3 DOS name for the new directory.
*
* \param[in] pFlag Create missing parent directories if true.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include this file is already open, \a parent is not a
* directory, \a path is invalid or already exists in \a parent.
*/
bool SdBaseFile::mkdir(SdBaseFile* parent, const char* path, bool pFlag) {
uint8_t dname[11];
SdBaseFile dir1, dir2;
SdBaseFile* sub = &dir1;
SdBaseFile* start = parent;
if (!parent || isOpen()) goto fail;
if (*path == '/') {
while (*path == '/') path++;
if (!parent->isRoot()) {
if (!dir2.openRoot(parent->vol_)) goto fail;
parent = &dir2;
}
}
while (1) {
if (!make83Name(path, dname, &path)) goto fail;
while (*path == '/') path++;
if (!*path) break;
if (!sub->open(parent, dname, O_READ)) {
if (!pFlag || !sub->mkdir(parent, dname)) {
goto fail;
}
}
if (parent != start) parent->close();
parent = sub;
sub = parent != &dir1 ? &dir1 : &dir2;
}
return mkdir(parent, dname);
fail:
return false;
}
//------------------------------------------------------------------------------
bool SdBaseFile::mkdir(SdBaseFile* parent, const uint8_t dname[11]) {
uint32_t block;
dir_t d;
dir_t* p;
if (!parent->isDir()) goto fail;
// create a normal file
if (!open(parent, dname, O_CREAT | O_EXCL | O_RDWR)) goto fail;
// convert file to directory
flags_ = O_READ;
type_ = FAT_FILE_TYPE_SUBDIR;
// allocate and zero first cluster
if (!addDirCluster())goto fail;
// force entry to SD
if (!sync()) goto fail;
// cache entry - should already be in cache due to sync() call
p = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!p) goto fail;
// change directory entry attribute
p->attributes = DIR_ATT_DIRECTORY;
// make entry for '.'
memcpy(&d, p, sizeof(d));
d.name[0] = '.';
for (uint8_t i = 1; i < 11; i++) d.name[i] = ' ';
// cache block for '.' and '..'
block = vol_->clusterStartBlock(firstCluster_);
if (!vol_->cacheRawBlock(block, SdVolume::CACHE_FOR_WRITE)) goto fail;
// copy '.' to block
memcpy(&vol_->cache()->dir[0], &d, sizeof(d));
// make entry for '..'
d.name[1] = '.';
if (parent->isRoot()) {
d.firstClusterLow = 0;
d.firstClusterHigh = 0;
}
else {
d.firstClusterLow = parent->firstCluster_ & 0XFFFF;
d.firstClusterHigh = parent->firstCluster_ >> 16;
}
// copy '..' to block
memcpy(&vol_->cache()->dir[1], &d, sizeof(d));
// write first block
return vol_->cacheFlush();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Open a file in the current working directory.
*
* \param[in] path A path with a valid 8.3 DOS name for a file to be opened.
*
* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
* OR of open flags. see SdBaseFile::open(SdBaseFile*, const char*, uint8_t).
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::open(const char* path, uint8_t oflag) {
return open(cwd_, path, oflag);
}
//------------------------------------------------------------------------------
/** Open a file or directory by name.
*
* \param[in] dirFile An open SdFat instance for the directory containing the
* file to be opened.
*
* \param[in] path A path with a valid 8.3 DOS name for a file to be opened.
*
* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
* OR of flags from the following list
*
* O_READ - Open for reading.
*
* O_RDONLY - Same as O_READ.
*
* O_WRITE - Open for writing.
*
* O_WRONLY - Same as O_WRITE.
*
* O_RDWR - Open for reading and writing.
*
* O_APPEND - If set, the file offset shall be set to the end of the
* file prior to each write.
*
* O_AT_END - Set the initial position at the end of the file.
*
* O_CREAT - If the file exists, this flag has no effect except as noted
* under O_EXCL below. Otherwise, the file shall be created
*
* O_EXCL - If O_CREAT and O_EXCL are set, open() shall fail if the file exists.
*
* O_SYNC - Call sync() after each write. This flag should not be used with
* write(uint8_t), write_P(PGM_P), writeln_P(PGM_P), or the Arduino Print class.
* These functions do character at a time writes so sync() will be called
* after each byte.
*
* O_TRUNC - If the file exists and is a regular file, and the file is
* successfully opened and is not read only, its length shall be truncated to 0.
*
* WARNING: A given file must not be opened by more than one SdBaseFile object
* of file corruption may occur.
*
* \note Directory files must be opened read only. Write and truncation is
* not allowed for directory files.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include this file is already open, \a dirFile is not
* a directory, \a path is invalid, the file does not exist
* or can't be opened in the access mode specified by oflag.
*/
bool SdBaseFile::open(SdBaseFile* dirFile, const char* path, uint8_t oflag) {
uint8_t dname[11];
SdBaseFile dir1, dir2;
SdBaseFile* parent = dirFile;
SdBaseFile* sub = &dir1;
if (!dirFile) goto fail;
// error if already open
if (isOpen()) goto fail;
if (*path == '/') {
while (*path == '/') path++;
if (!dirFile->isRoot()) {
if (!dir2.openRoot(dirFile->vol_)) goto fail;
parent = &dir2;
}
}
while (1) {
if (!make83Name(path, dname, &path)) goto fail;
while (*path == '/') path++;
if (!*path) break;
if (!sub->open(parent, dname, O_READ)) goto fail;
if (parent != dirFile) parent->close();
parent = sub;
sub = parent != &dir1 ? &dir1 : &dir2;
}
return open(parent, dname, oflag);
fail:
return false;
}
//------------------------------------------------------------------------------
// open with filename in dname
bool SdBaseFile::open(SdBaseFile* dirFile,
const uint8_t dname[11], uint8_t oflag) {
bool emptyFound = false;
bool fileFound = false;
uint8_t index;
dir_t* p;
vol_ = dirFile->vol_;
dirFile->rewind();
// search for file
while (dirFile->curPosition_ < dirFile->fileSize_) {
index = 0XF & (dirFile->curPosition_ >> 5);
p = dirFile->readDirCache();
if (!p) goto fail;
if (p->name[0] == DIR_NAME_FREE || p->name[0] == DIR_NAME_DELETED) {
// remember first empty slot
if (!emptyFound) {
dirBlock_ = dirFile->vol_->cacheBlockNumber();
dirIndex_ = index;
emptyFound = true;
}
// done if no entries follow
if (p->name[0] == DIR_NAME_FREE) break;
}
else if (!memcmp(dname, p->name, 11)) {
fileFound = true;
break;
}
}
if (fileFound) {
// don't open existing file if O_EXCL
if (oflag & O_EXCL) goto fail;
}
else {
// don't create unless O_CREAT and O_WRITE
if (!(oflag & O_CREAT) || !(oflag & O_WRITE)) goto fail;
if (emptyFound) {
index = dirIndex_;
p = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!p) goto fail;
}
else {
if (dirFile->type_ == FAT_FILE_TYPE_ROOT_FIXED) goto fail;
// add and zero cluster for dirFile - first cluster is in cache for write
if (!dirFile->addDirCluster()) goto fail;
// use first entry in cluster
p = dirFile->vol_->cache()->dir;
index = 0;
}
// initialize as empty file
memset(p, 0, sizeof(dir_t));
memcpy(p->name, dname, 11);
// set timestamps
if (dateTime_) {
// call user date/time function
dateTime_(&p->creationDate, &p->creationTime);
}
else {
// use default date/time
p->creationDate = FAT_DEFAULT_DATE;
p->creationTime = FAT_DEFAULT_TIME;
}
p->lastAccessDate = p->creationDate;
p->lastWriteDate = p->creationDate;
p->lastWriteTime = p->creationTime;
// write entry to SD
if (!dirFile->vol_->cacheFlush()) goto fail;
}
// open entry in cache
return openCachedEntry(index, oflag);
fail:
return false;
}
//------------------------------------------------------------------------------
/** Open a file by index.
*
* \param[in] dirFile An open SdFat instance for the directory.
*
* \param[in] index The \a index of the directory entry for the file to be
* opened. The value for \a index is (directory file position)/32.
*
* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
* OR of flags O_READ, O_WRITE, O_TRUNC, and O_SYNC.
*
* See open() by path for definition of flags.
* \return true for success or false for failure.
*/
bool SdBaseFile::open(SdBaseFile* dirFile, uint16_t index, uint8_t oflag) {
dir_t* p;
vol_ = dirFile->vol_;
// error if already open
if (isOpen() || !dirFile) goto fail;
// don't open existing file if O_EXCL - user call error
if (oflag & O_EXCL) goto fail;
// seek to location of entry
if (!dirFile->seekSet(32 * index)) goto fail;
// read entry into cache
p = dirFile->readDirCache();
if (!p) goto fail;
// error if empty slot or '.' or '..'
if (p->name[0] == DIR_NAME_FREE ||
p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') {
goto fail;
}
// open cached entry
return openCachedEntry(index & 0XF, oflag);
fail:
return false;
}
//------------------------------------------------------------------------------
// open a cached directory entry. Assumes vol_ is initialized
bool SdBaseFile::openCachedEntry(uint8_t dirIndex, uint8_t oflag) {
// location of entry in cache
dir_t* p = &vol_->cache()->dir[dirIndex];
// write or truncate is an error for a directory or read-only file
if (p->attributes & (DIR_ATT_READ_ONLY | DIR_ATT_DIRECTORY)) {
if (oflag & (O_WRITE | O_TRUNC)) goto fail;
}
// remember location of directory entry on SD
dirBlock_ = vol_->cacheBlockNumber();
dirIndex_ = dirIndex;
// copy first cluster number for directory fields
firstCluster_ = (uint32_t)p->firstClusterHigh << 16;
firstCluster_ |= p->firstClusterLow;
// make sure it is a normal file or subdirectory
if (DIR_IS_FILE(p)) {
fileSize_ = p->fileSize;
type_ = FAT_FILE_TYPE_NORMAL;
}
else if (DIR_IS_SUBDIR(p)) {
if (!vol_->chainSize(firstCluster_, &fileSize_)) goto fail;
type_ = FAT_FILE_TYPE_SUBDIR;
}
else {
goto fail;
}
// save open flags for read/write
flags_ = oflag & F_OFLAG;
// set to start of file
curCluster_ = 0;
curPosition_ = 0;
if ((oflag & O_TRUNC) && !truncate(0)) return false;
return oflag & O_AT_END ? seekEnd(0) : true;
fail:
type_ = FAT_FILE_TYPE_CLOSED;
return false;
}
//------------------------------------------------------------------------------
/** Open the next file or subdirectory in a directory.
*
* \param[in] dirFile An open SdFat instance for the directory containing the
* file to be opened.
*
* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
* OR of flags O_READ, O_WRITE, O_TRUNC, and O_SYNC.
*
* See open() by path for definition of flags.
* \return true for success or false for failure.
*/
bool SdBaseFile::openNext(SdBaseFile* dirFile, uint8_t oflag) {
dir_t* p;
uint8_t index;
if (!dirFile) goto fail;
// error if already open
if (isOpen()) goto fail;
vol_ = dirFile->vol_;
while (1) {
index = 0XF & (dirFile->curPosition_ >> 5);
// read entry into cache
p = dirFile->readDirCache();
if (!p) goto fail;
// done if last entry
if (p->name[0] == DIR_NAME_FREE) goto fail;
// skip empty slot or '.' or '..'
if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') {
continue;
}
// must be file or dir
if (DIR_IS_FILE_OR_SUBDIR(p)) {
return openCachedEntry(index, oflag);
}
}
fail:
return false;
}
//------------------------------------------------------------------------------
/** Open a directory's parent directory.
*
* \param[in] dir Parent of this directory will be opened. Must not be root.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::openParent(SdBaseFile* dir) {
dir_t entry;
dir_t* p;
SdBaseFile file;
uint32_t c;
uint32_t cluster;
uint32_t lbn;
// error if already open or dir is root or dir is not a directory
if (isOpen() || !dir || dir->isRoot() || !dir->isDir()) goto fail;
vol_ = dir->vol_;
// position to '..'
if (!dir->seekSet(32)) goto fail;
// read '..' entry
if (dir->read(&entry, sizeof(entry)) != 32) goto fail;
// verify it is '..'
if (entry.name[0] != '.' || entry.name[1] != '.') goto fail;
// start cluster for '..'
cluster = entry.firstClusterLow;
cluster |= (uint32_t)entry.firstClusterHigh << 16;
if (cluster == 0) return openRoot(vol_);
// start block for '..'
lbn = vol_->clusterStartBlock(cluster);
// first block of parent dir
if (!vol_->cacheRawBlock(lbn, SdVolume::CACHE_FOR_READ)) {
goto fail;
}
p = &vol_->cacheBuffer_.dir[1];
// verify name for '../..'
if (p->name[0] != '.' || p->name[1] != '.') goto fail;
// '..' is pointer to first cluster of parent. open '../..' to find parent
if (p->firstClusterHigh == 0 && p->firstClusterLow == 0) {
if (!file.openRoot(dir->volume())) goto fail;
}
else if (!file.openCachedEntry(1, O_READ)) {
goto fail;
}
// search for parent in '../..'
do {
if (file.readDir(&entry, NULL) != 32) goto fail;
c = entry.firstClusterLow;
c |= (uint32_t)entry.firstClusterHigh << 16;
} while (c != cluster);
// open parent
return open(&file, file.curPosition() / 32 - 1, O_READ);
fail:
return false;
}
//------------------------------------------------------------------------------
/** Open a volume's root directory.
*
* \param[in] vol The FAT volume containing the root directory to be opened.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include the file is already open, the FAT volume has
* not been initialized or it a FAT12 volume.
*/
bool SdBaseFile::openRoot(SdVolume* vol) {
// error if file is already open
if (isOpen()) goto fail;
if (vol->fatType() == 16 || (FAT12_SUPPORT && vol->fatType() == 12)) {
type_ = FAT_FILE_TYPE_ROOT_FIXED;
firstCluster_ = 0;
fileSize_ = 32 * vol->rootDirEntryCount();
}
else if (vol->fatType() == 32) {
type_ = FAT_FILE_TYPE_ROOT32;
firstCluster_ = vol->rootDirStart();
if (!vol->chainSize(firstCluster_, &fileSize_)) goto fail;
}
else {
// volume is not initialized, invalid, or FAT12 without support
return false;
}
vol_ = vol;
// read only
flags_ = O_READ;
// set to start of file
curCluster_ = 0;
curPosition_ = 0;
// root has no directory entry
dirBlock_ = 0;
dirIndex_ = 0;
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
/** Return the next available byte without consuming it.
*
* \return The byte if no error and not at eof else -1;
*/
int SdBaseFile::peek() {
filepos_t pos;
getpos(&pos);
int c = read();
if (c >= 0) setpos(&pos);
return c;
}
//------------------------------------------------------------------------------
/** %Print the name field of a directory entry in 8.3 format.
* \param[in] pr Print stream for output.
* \param[in] dir The directory structure containing the name.
* \param[in] width Blank fill name if length is less than \a width.
* \param[in] printSlash Print '/' after directory names if true.
*/
void SdBaseFile::printDirName(const dir_t& dir,
uint8_t width, bool printSlash) {
uint8_t w = 0;
for (uint8_t i = 0; i < 11; i++) {
if (dir.name[i] == ' ')continue;
if (i == 8) {
MYSERIAL.write('.');
w++;
}
MYSERIAL.write(dir.name[i]);
w++;
}
if (DIR_IS_SUBDIR(&dir) && printSlash) {
MYSERIAL.write('/');
w++;
}
while (w < width) {
MYSERIAL.write(' ');
w++;
}
}
//------------------------------------------------------------------------------
// print uint8_t with width 2
static void print2u(uint8_t v) {
if (v < 10) MYSERIAL.write('0');
MYSERIAL.print(v, DEC);
}
//------------------------------------------------------------------------------
/** %Print a directory date field to Serial.
*
* Format is yyyy-mm-dd.
*
* \param[in] fatDate The date field from a directory entry.
*/
//------------------------------------------------------------------------------
/** %Print a directory date field.
*
* Format is yyyy-mm-dd.
*
* \param[in] pr Print stream for output.
* \param[in] fatDate The date field from a directory entry.
*/
void SdBaseFile::printFatDate(uint16_t fatDate) {
MYSERIAL.print(FAT_YEAR(fatDate));
MYSERIAL.write('-');
print2u(FAT_MONTH(fatDate));
MYSERIAL.write('-');
print2u(FAT_DAY(fatDate));
}
//------------------------------------------------------------------------------
/** %Print a directory time field.
*
* Format is hh:mm:ss.
*
* \param[in] pr Print stream for output.
* \param[in] fatTime The time field from a directory entry.
*/
void SdBaseFile::printFatTime(uint16_t fatTime) {
print2u(FAT_HOUR(fatTime));
MYSERIAL.write(':');
print2u(FAT_MINUTE(fatTime));
MYSERIAL.write(':');
print2u(FAT_SECOND(fatTime));
}
//------------------------------------------------------------------------------
/** Print a file's name to Serial
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::printName() {
char name[FILENAME_LENGTH];
if (!getFilename(name)) return false;
MYSERIAL.print(name);
return true;
}
//------------------------------------------------------------------------------
/** Read the next byte from a file.
*
* \return For success read returns the next byte in the file as an int.
* If an error occurs or end of file is reached -1 is returned.
*/
int16_t SdBaseFile::read() {
uint8_t b;
return read(&b, 1) == 1 ? b : -1;
}
//------------------------------------------------------------------------------
/** Read data from a file starting at the current position.
*
* \param[out] buf Pointer to the location that will receive the data.
*
* \param[in] nbyte Maximum number of bytes to read.
*
* \return For success read() returns the number of bytes read.
* A value less than \a nbyte, including zero, will be returned
* if end of file is reached.
* If an error occurs, read() returns -1. Possible errors include
* read() called before a file has been opened, corrupt file system
* or an I/O error occurred.
*/
int16_t SdBaseFile::read(void* buf, uint16_t nbyte) {
uint8_t* dst = reinterpret_cast<uint8_t*>(buf);
uint16_t offset;
uint16_t toRead;
uint32_t block; // raw device block number
// error if not open or write only
if (!isOpen() || !(flags_ & O_READ)) goto fail;
// max bytes left in file
NOMORE(nbyte, fileSize_ - curPosition_);
// amount left to read
toRead = nbyte;
while (toRead > 0) {
offset = curPosition_ & 0X1FF; // offset in block
if (type_ == FAT_FILE_TYPE_ROOT_FIXED) {
block = vol_->rootDirStart() + (curPosition_ >> 9);
}
else {
uint8_t blockOfCluster = vol_->blockOfCluster(curPosition_);
if (offset == 0 && blockOfCluster == 0) {
// start of new cluster
if (curPosition_ == 0) {
// use first cluster in file
curCluster_ = firstCluster_;
}
else {
// get next cluster from FAT
if (!vol_->fatGet(curCluster_, &curCluster_)) goto fail;
}
}
block = vol_->clusterStartBlock(curCluster_) + blockOfCluster;
}
uint16_t n = toRead;
// amount to be read from current block
NOMORE(n, 512 - offset);
// no buffering needed if n == 512
if (n == 512 && block != vol_->cacheBlockNumber()) {
if (!vol_->readBlock(block, dst)) goto fail;
}
else {
// read block to cache and copy data to caller
if (!vol_->cacheRawBlock(block, SdVolume::CACHE_FOR_READ)) goto fail;
uint8_t* src = vol_->cache()->data + offset;
memcpy(dst, src, n);
}
dst += n;
curPosition_ += n;
toRead -= n;
}
return nbyte;
fail:
return -1;
}
/**
* Read the next entry in a directory.
*
* \param[out] dir The dir_t struct that will receive the data.
*
* \return For success readDir() returns the number of bytes read.
* A value of zero will be returned if end of file is reached.
* If an error occurs, readDir() returns -1. Possible errors include
* readDir() called before a directory has been opened, this is not
* a directory file or an I/O error occurred.
*/
int8_t SdBaseFile::readDir(dir_t* dir, char* longFilename) {
int16_t n;
// if not a directory file or miss-positioned return an error
if (!isDir() || (0X1F & curPosition_)) return -1;
//If we have a longFilename buffer, mark it as invalid. If we find a long filename it will be filled automaticly.
if (longFilename != NULL) longFilename[0] = '\0';
while (1) {
n = read(dir, sizeof(dir_t));
if (n != sizeof(dir_t)) return n == 0 ? 0 : -1;
// last entry if DIR_NAME_FREE
if (dir->name[0] == DIR_NAME_FREE) return 0;
// skip empty entries and entry for . and ..
if (dir->name[0] == DIR_NAME_DELETED || dir->name[0] == '.') continue;
// Fill the long filename if we have a long filename entry.
// Long filename entries are stored before the short filename.
if (longFilename != NULL && DIR_IS_LONG_NAME(dir)) {
vfat_t* VFAT = (vfat_t*)dir;
// Sanity-check the VFAT entry. The first cluster is always set to zero. And the sequence number should be higher than 0
if (VFAT->firstClusterLow == 0 && (VFAT->sequenceNumber & 0x1F) > 0 && (VFAT->sequenceNumber & 0x1F) <= MAX_VFAT_ENTRIES) {
// TODO: Store the filename checksum to verify if a none-long filename aware system modified the file table.
n = ((VFAT->sequenceNumber & 0x1F) - 1) * (FILENAME_LENGTH);
for (uint8_t i = 0; i < FILENAME_LENGTH; i++)
longFilename[n + i] = (i < 5) ? VFAT->name1[i] : (i < 11) ? VFAT->name2[i - 5] : VFAT->name3[i - 11];
// If this VFAT entry is the last one, add a NUL terminator at the end of the string
if (VFAT->sequenceNumber & 0x40) longFilename[n + FILENAME_LENGTH] = '\0';
}
}
// Return if normal file or subdirectory
if (DIR_IS_FILE_OR_SUBDIR(dir)) return n;
}
}
//------------------------------------------------------------------------------
// Read next directory entry into the cache
// Assumes file is correctly positioned
dir_t* SdBaseFile::readDirCache() {
uint8_t i;
// error if not directory
if (!isDir()) goto fail;
// index of entry in cache
i = (curPosition_ >> 5) & 0XF;
// use read to locate and cache block
if (read() < 0) goto fail;
// advance to next entry
curPosition_ += 31;
// return pointer to entry
return vol_->cache()->dir + i;
fail:
return 0;
}
//------------------------------------------------------------------------------
/** Remove a file.
*
* The directory entry and all data for the file are deleted.
*
* \note This function should not be used to delete the 8.3 version of a
* file that has a long name. For example if a file has the long name
* "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include the file read-only, is a directory,
* or an I/O error occurred.
*/
bool SdBaseFile::remove() {
dir_t* d;
// free any clusters - will fail if read-only or directory
if (!truncate(0)) goto fail;
// cache directory entry
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
// mark entry deleted
d->name[0] = DIR_NAME_DELETED;
// set this file closed
type_ = FAT_FILE_TYPE_CLOSED;
// write entry to SD
return vol_->cacheFlush();
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
/** Remove a file.
*
* The directory entry and all data for the file are deleted.
*
* \param[in] dirFile The directory that contains the file.
* \param[in] path Path for the file to be removed.
*
* \note This function should not be used to delete the 8.3 version of a
* file that has a long name. For example if a file has the long name
* "New Text Document.txt" you should not delete the 8.3 name "NEWTEX~1.TXT".
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include the file is a directory, is read only,
* \a dirFile is not a directory, \a path is not found
* or an I/O error occurred.
*/
bool SdBaseFile::remove(SdBaseFile* dirFile, const char* path) {
SdBaseFile file;
if (!file.open(dirFile, path, O_WRITE)) goto fail;
return file.remove();
fail:
// can't set iostate - static function
return false;
}
//------------------------------------------------------------------------------
/** Rename a file or subdirectory.
*
* \param[in] dirFile Directory for the new path.
* \param[in] newPath New path name for the file/directory.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include \a dirFile is not open or is not a directory
* file, newPath is invalid or already exists, or an I/O error occurs.
*/
bool SdBaseFile::rename(SdBaseFile* dirFile, const char* newPath) {
dir_t entry;
uint32_t dirCluster = 0;
SdBaseFile file;
dir_t* d;
// must be an open file or subdirectory
if (!(isFile() || isSubDir())) goto fail;
// can't move file
if (vol_ != dirFile->vol_) goto fail;
// sync() and cache directory entry
sync();
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
// save directory entry
memcpy(&entry, d, sizeof(entry));
// mark entry deleted
d->name[0] = DIR_NAME_DELETED;
// make directory entry for new path
if (isFile()) {
if (!file.open(dirFile, newPath, O_CREAT | O_EXCL | O_WRITE)) {
goto restore;
}
}
else {
// don't create missing path prefix components
if (!file.mkdir(dirFile, newPath, false)) {
goto restore;
}
// save cluster containing new dot dot
dirCluster = file.firstCluster_;
}
// change to new directory entry
dirBlock_ = file.dirBlock_;
dirIndex_ = file.dirIndex_;
// mark closed to avoid possible destructor close call
file.type_ = FAT_FILE_TYPE_CLOSED;
// cache new directory entry
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
// copy all but name field to new directory entry
memcpy(&d->attributes, &entry.attributes, sizeof(entry) - sizeof(d->name));
// update dot dot if directory
if (dirCluster) {
// get new dot dot
uint32_t block = vol_->clusterStartBlock(dirCluster);
if (!vol_->cacheRawBlock(block, SdVolume::CACHE_FOR_READ)) goto fail;
memcpy(&entry, &vol_->cache()->dir[1], sizeof(entry));
// free unused cluster
if (!vol_->freeChain(dirCluster)) goto fail;
// store new dot dot
block = vol_->clusterStartBlock(firstCluster_);
if (!vol_->cacheRawBlock(block, SdVolume::CACHE_FOR_WRITE)) goto fail;
memcpy(&vol_->cache()->dir[1], &entry, sizeof(entry));
}
return vol_->cacheFlush();
restore:
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
// restore entry
d->name[0] = entry.name[0];
vol_->cacheFlush();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Remove a directory file.
*
* The directory file will be removed only if it is empty and is not the
* root directory. rmdir() follows DOS and Windows and ignores the
* read-only attribute for the directory.
*
* \note This function should not be used to delete the 8.3 version of a
* directory that has a long name. For example if a directory has the
* long name "New folder" you should not delete the 8.3 name "NEWFOL~1".
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include the file is not a directory, is the root
* directory, is not empty, or an I/O error occurred.
*/
bool SdBaseFile::rmdir() {
// must be open subdirectory
if (!isSubDir()) goto fail;
rewind();
// make sure directory is empty
while (curPosition_ < fileSize_) {
dir_t* p = readDirCache();
if (!p) goto fail;
// done if past last used entry
if (p->name[0] == DIR_NAME_FREE) break;
// skip empty slot, '.' or '..'
if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') continue;
// error not empty
if (DIR_IS_FILE_OR_SUBDIR(p)) goto fail;
}
// convert empty directory to normal file for remove
type_ = FAT_FILE_TYPE_NORMAL;
flags_ |= O_WRITE;
return remove();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Recursively delete a directory and all contained files.
*
* This is like the Unix/Linux 'rm -rf *' if called with the root directory
* hence the name.
*
* Warning - This will remove all contents of the directory including
* subdirectories. The directory will then be removed if it is not root.
* The read-only attribute for files will be ignored.
*
* \note This function should not be used to delete the 8.3 version of
* a directory that has a long name. See remove() and rmdir().
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::rmRfStar() {
uint16_t index;
SdBaseFile f;
rewind();
while (curPosition_ < fileSize_) {
// remember position
index = curPosition_ / 32;
dir_t* p = readDirCache();
if (!p) goto fail;
// done if past last entry
if (p->name[0] == DIR_NAME_FREE) break;
// skip empty slot or '.' or '..'
if (p->name[0] == DIR_NAME_DELETED || p->name[0] == '.') continue;
// skip if part of long file name or volume label in root
if (!DIR_IS_FILE_OR_SUBDIR(p)) continue;
if (!f.open(this, index, O_READ)) goto fail;
if (f.isSubDir()) {
// recursively delete
if (!f.rmRfStar()) goto fail;
}
else {
// ignore read-only
f.flags_ |= O_WRITE;
if (!f.remove()) goto fail;
}
// position to next entry if required
if (curPosition_ != (32 * (index + 1))) {
if (!seekSet(32 * (index + 1))) goto fail;
}
}
// don't try to delete root
if (!isRoot()) {
if (!rmdir()) goto fail;
}
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
/** Create a file object and open it in the current working directory.
*
* \param[in] path A path with a valid 8.3 DOS name for a file to be opened.
*
* \param[in] oflag Values for \a oflag are constructed by a bitwise-inclusive
* OR of open flags. see SdBaseFile::open(SdBaseFile*, const char*, uint8_t).
*/
SdBaseFile::SdBaseFile(const char* path, uint8_t oflag) {
type_ = FAT_FILE_TYPE_CLOSED;
writeError = false;
open(path, oflag);
}
//------------------------------------------------------------------------------
/** Sets a file's position.
*
* \param[in] pos The new position in bytes from the beginning of the file.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::seekSet(uint32_t pos) {
uint32_t nCur;
uint32_t nNew;
// error if file not open or seek past end of file
if (!isOpen() || pos > fileSize_) goto fail;
if (type_ == FAT_FILE_TYPE_ROOT_FIXED) {
curPosition_ = pos;
goto done;
}
if (pos == 0) {
// set position to start of file
curCluster_ = 0;
curPosition_ = 0;
goto done;
}
// calculate cluster index for cur and new position
nCur = (curPosition_ - 1) >> (vol_->clusterSizeShift_ + 9);
nNew = (pos - 1) >> (vol_->clusterSizeShift_ + 9);
if (nNew < nCur || curPosition_ == 0) {
// must follow chain from first cluster
curCluster_ = firstCluster_;
}
else {
// advance from curPosition
nNew -= nCur;
}
while (nNew--) {
if (!vol_->fatGet(curCluster_, &curCluster_)) goto fail;
}
curPosition_ = pos;
done:
return true;
fail:
return false;
}
//------------------------------------------------------------------------------
void SdBaseFile::setpos(filepos_t* pos) {
curPosition_ = pos->position;
curCluster_ = pos->cluster;
}
//------------------------------------------------------------------------------
/** The sync() call causes all modified data and directory fields
* to be written to the storage device.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include a call to sync() before a file has been
* opened or an I/O error.
*/
bool SdBaseFile::sync() {
// only allow open files and directories
if (!isOpen()) goto fail;
if (flags_ & F_FILE_DIR_DIRTY) {
dir_t* d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
// check for deleted by another open file object
if (!d || d->name[0] == DIR_NAME_DELETED) goto fail;
// do not set filesize for dir files
if (!isDir()) d->fileSize = fileSize_;
// update first cluster fields
d->firstClusterLow = firstCluster_ & 0XFFFF;
d->firstClusterHigh = firstCluster_ >> 16;
// set modify time if user supplied a callback date/time function
if (dateTime_) {
dateTime_(&d->lastWriteDate, &d->lastWriteTime);
d->lastAccessDate = d->lastWriteDate;
}
// clear directory dirty
flags_ &= ~F_FILE_DIR_DIRTY;
}
return vol_->cacheFlush();
fail:
writeError = true;
return false;
}
//------------------------------------------------------------------------------
/** Copy a file's timestamps
*
* \param[in] file File to copy timestamps from.
*
* \note
* Modify and access timestamps may be overwritten if a date time callback
* function has been set by dateTimeCallback().
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::timestamp(SdBaseFile* file) {
dir_t* d;
dir_t dir;
// get timestamps
if (!file->dirEntry(&dir)) goto fail;
// update directory fields
if (!sync()) goto fail;
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
// copy timestamps
d->lastAccessDate = dir.lastAccessDate;
d->creationDate = dir.creationDate;
d->creationTime = dir.creationTime;
d->creationTimeTenths = dir.creationTimeTenths;
d->lastWriteDate = dir.lastWriteDate;
d->lastWriteTime = dir.lastWriteTime;
// write back entry
return vol_->cacheFlush();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Set a file's timestamps in its directory entry.
*
* \param[in] flags Values for \a flags are constructed by a bitwise-inclusive
* OR of flags from the following list
*
* T_ACCESS - Set the file's last access date.
*
* T_CREATE - Set the file's creation date and time.
*
* T_WRITE - Set the file's last write/modification date and time.
*
* \param[in] year Valid range 1980 - 2107 inclusive.
*
* \param[in] month Valid range 1 - 12 inclusive.
*
* \param[in] day Valid range 1 - 31 inclusive.
*
* \param[in] hour Valid range 0 - 23 inclusive.
*
* \param[in] minute Valid range 0 - 59 inclusive.
*
* \param[in] second Valid range 0 - 59 inclusive
*
* \note It is possible to set an invalid date since there is no check for
* the number of days in a month.
*
* \note
* Modify and access timestamps may be overwritten if a date time callback
* function has been set by dateTimeCallback().
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
*/
bool SdBaseFile::timestamp(uint8_t flags, uint16_t year, uint8_t month,
uint8_t day, uint8_t hour, uint8_t minute, uint8_t second) {
uint16_t dirDate;
uint16_t dirTime;
dir_t* d;
if (!isOpen()
|| year < 1980
|| year > 2107
|| month < 1
|| month > 12
|| day < 1
|| day > 31
|| hour > 23
|| minute > 59
|| second > 59) {
goto fail;
}
// update directory entry
if (!sync()) goto fail;
d = cacheDirEntry(SdVolume::CACHE_FOR_WRITE);
if (!d) goto fail;
dirDate = FAT_DATE(year, month, day);
dirTime = FAT_TIME(hour, minute, second);
if (flags & T_ACCESS) {
d->lastAccessDate = dirDate;
}
if (flags & T_CREATE) {
d->creationDate = dirDate;
d->creationTime = dirTime;
// seems to be units of 1/100 second not 1/10 as Microsoft states
d->creationTimeTenths = second & 1 ? 100 : 0;
}
if (flags & T_WRITE) {
d->lastWriteDate = dirDate;
d->lastWriteTime = dirTime;
}
return vol_->cacheFlush();
fail:
return false;
}
//------------------------------------------------------------------------------
/** Truncate a file to a specified length. The current file position
* will be maintained if it is less than or equal to \a length otherwise
* it will be set to end of file.
*
* \param[in] length The desired length for the file.
*
* \return The value one, true, is returned for success and
* the value zero, false, is returned for failure.
* Reasons for failure include file is read only, file is a directory,
* \a length is greater than the current file size or an I/O error occurs.
*/
bool SdBaseFile::truncate(uint32_t length) {
uint32_t newPos;
// error if not a normal file or read-only
if (!isFile() || !(flags_ & O_WRITE)) goto fail;
// error if length is greater than current size
if (length > fileSize_) goto fail;
// fileSize and length are zero - nothing to do
if (fileSize_ == 0) return true;
// remember position for seek after truncation
newPos = curPosition_ > length ? length : curPosition_;
// position to last cluster in truncated file
if (!seekSet(length)) goto fail;
if (length == 0) {
// free all clusters
if (!vol_->freeChain(firstCluster_)) goto fail;
firstCluster_ = 0;
}
else {
uint32_t toFree;
if (!vol_->fatGet(curCluster_, &toFree)) goto fail;
if (!vol_->isEOC(toFree)) {
// free extra clusters
if (!vol_->freeChain(toFree)) goto fail;
// current cluster is end of chain
if (!vol_->fatPutEOC(curCluster_)) goto fail;
}
}
fileSize_ = length;
// need to update directory entry
flags_ |= F_FILE_DIR_DIRTY;
if (!sync()) goto fail;
// set file to correct position
return seekSet(newPos);
fail:
return false;
}
//------------------------------------------------------------------------------
/** Write data to an open file.
*
* \note Data is moved to the cache but may not be written to the
* storage device until sync() is called.
*
* \param[in] buf Pointer to the location of the data to be written.
*
* \param[in] nbyte Number of bytes to write.
*
* \return For success write() returns the number of bytes written, always
* \a nbyte. If an error occurs, write() returns -1. Possible errors
* include write() is called before a file has been opened, write is called
* for a read-only file, device is full, a corrupt file system or an I/O error.
*
*/
int16_t SdBaseFile::write(const void* buf, uint16_t nbyte) {
// convert void* to uint8_t* - must be before goto statements
const uint8_t* src = reinterpret_cast<const uint8_t*>(buf);
// number of bytes left to write - must be before goto statements
uint16_t nToWrite = nbyte;
// error if not a normal file or is read-only
if (!isFile() || !(flags_ & O_WRITE)) goto fail;
// seek to end of file if append flag
if ((flags_ & O_APPEND) && curPosition_ != fileSize_) {
if (!seekEnd()) goto fail;
}
while (nToWrite > 0) {
uint8_t blockOfCluster = vol_->blockOfCluster(curPosition_);
uint16_t blockOffset = curPosition_ & 0X1FF;
if (blockOfCluster == 0 && blockOffset == 0) {
// start of new cluster
if (curCluster_ == 0) {
if (firstCluster_ == 0) {
// allocate first cluster of file
if (!addCluster()) goto fail;
}
else {
curCluster_ = firstCluster_;
}
}
else {
uint32_t next;
if (!vol_->fatGet(curCluster_, &next)) goto fail;
if (vol_->isEOC(next)) {
// add cluster if at end of chain
if (!addCluster()) goto fail;
}
else {
curCluster_ = next;
}
}
}
// max space in block
uint16_t n = 512 - blockOffset;
// lesser of space and amount to write
NOMORE(n, nToWrite);
// block for data write
uint32_t block = vol_->clusterStartBlock(curCluster_) + blockOfCluster;
if (n == 512) {
// full block - don't need to use cache
if (vol_->cacheBlockNumber() == block) {
// invalidate cache if block is in cache
vol_->cacheSetBlockNumber(0XFFFFFFFF, false);
}
if (!vol_->writeBlock(block, src)) goto fail;
}
else {
if (blockOffset == 0 && curPosition_ >= fileSize_) {
// start of new block don't need to read into cache
if (!vol_->cacheFlush()) goto fail;
// set cache dirty and SD address of block
vol_->cacheSetBlockNumber(block, true);
}
else {
// rewrite part of block
if (!vol_->cacheRawBlock(block, SdVolume::CACHE_FOR_WRITE)) goto fail;
}
uint8_t* dst = vol_->cache()->data + blockOffset;
memcpy(dst, src, n);
}
curPosition_ += n;
src += n;
nToWrite -= n;
}
if (curPosition_ > fileSize_) {
// update fileSize and insure sync will update dir entry
fileSize_ = curPosition_;
flags_ |= F_FILE_DIR_DIRTY;
}
else if (dateTime_ && nbyte) {
// insure sync will update modified date and time
flags_ |= F_FILE_DIR_DIRTY;
}
if (flags_ & O_SYNC) {
if (!sync()) goto fail;
}
return nbyte;
fail:
// return for write error
writeError = true;
return -1;
}
//------------------------------------------------------------------------------
// suppress cpplint warnings with NOLINT comment
#if ALLOW_DEPRECATED_FUNCTIONS && !defined(DOXYGEN)
void (*SdBaseFile::oldDateTime_)(uint16_t& date, uint16_t& time) = 0; // NOLINT
#endif // ALLOW_DEPRECATED_FUNCTIONS
#endif