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1826 lines
55 KiB
C++
1826 lines
55 KiB
C++
/* Arduino SdFat Library
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* Copyright (C) 2009 by William Greiman
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*
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* This file is part of the Arduino SdFat Library
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*
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* This Library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This Library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Arduino SdFat Library. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include "Marlin.h"
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#ifdef SDSUPPORT
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#include "SdBaseFile.h"
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//------------------------------------------------------------------------------
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// pointer to cwd directory
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SdBaseFile* SdBaseFile::cwd_ = 0;
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// callback function for date/time
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void (*SdBaseFile::dateTime_)(uint16_t* date, uint16_t* time) = 0;
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//------------------------------------------------------------------------------
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// add a cluster to a file
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bool SdBaseFile::addCluster() {
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if (!vol_->allocContiguous(1, &curCluster_)) goto fail;
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// if first cluster of file link to directory entry
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if (firstCluster_ == 0) {
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firstCluster_ = curCluster_;
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flags_ |= F_FILE_DIR_DIRTY;
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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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// Add a cluster to a directory file and zero the cluster.
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// return with first block of cluster in the cache
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bool SdBaseFile::addDirCluster() {
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uint32_t block;
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// max folder size
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if (fileSize_/sizeof(dir_t) >= 0XFFFF) goto fail;
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if (!addCluster()) goto fail;
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if (!vol_->cacheFlush()) goto fail;
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block = vol_->clusterStartBlock(curCluster_);
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// set cache to first block of cluster
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vol_->cacheSetBlockNumber(block, true);
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// zero first block of cluster
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memset(vol_->cacheBuffer_.data, 0, 512);
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// zero rest of cluster
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for (uint8_t i = 1; i < vol_->blocksPerCluster_; i++) {
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if (!vol_->writeBlock(block + i, vol_->cacheBuffer_.data)) goto fail;
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}
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// Increase directory file size by cluster size
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fileSize_ += 512UL << vol_->clusterSizeShift_;
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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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// cache a file's directory entry
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// return pointer to cached entry or null for failure
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dir_t* SdBaseFile::cacheDirEntry(uint8_t action) {
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if (!vol_->cacheRawBlock(dirBlock_, action)) goto fail;
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return vol_->cache()->dir + dirIndex_;
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fail:
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return 0;
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}
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//------------------------------------------------------------------------------
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/** Close a file and force cached data and directory information
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* to be written to the storage device.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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* Reasons for failure include no file is open or an I/O error.
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*/
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bool SdBaseFile::close() {
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bool rtn = sync();
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type_ = FAT_FILE_TYPE_CLOSED;
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return rtn;
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}
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//------------------------------------------------------------------------------
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/** Check for contiguous file and return its raw block range.
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*
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* \param[out] bgnBlock the first block address for the file.
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* \param[out] endBlock the last block address for the file.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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* Reasons for failure include file is not contiguous, file has zero length
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* or an I/O error occurred.
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*/
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bool SdBaseFile::contiguousRange(uint32_t* bgnBlock, uint32_t* endBlock) {
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// error if no blocks
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if (firstCluster_ == 0) goto fail;
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for (uint32_t c = firstCluster_; ; c++) {
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uint32_t next;
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if (!vol_->fatGet(c, &next)) goto fail;
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// check for contiguous
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if (next != (c + 1)) {
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// error if not end of chain
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if (!vol_->isEOC(next)) goto fail;
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*bgnBlock = vol_->clusterStartBlock(firstCluster_);
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*endBlock = vol_->clusterStartBlock(c)
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+ vol_->blocksPerCluster_ - 1;
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return true;
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}
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}
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fail:
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return false;
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}
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//------------------------------------------------------------------------------
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/** Create and open a new contiguous file of a specified size.
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*
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* \note This function only supports short DOS 8.3 names.
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* See open() for more information.
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*
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* \param[in] dirFile The directory where the file will be created.
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* \param[in] path A path with a valid DOS 8.3 file name.
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* \param[in] size The desired file size.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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* Reasons for failure include \a path contains
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* an invalid DOS 8.3 file name, the FAT volume has not been initialized,
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* a file is already open, the file already exists, the root
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* directory is full or an I/O error.
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*
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*/
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bool SdBaseFile::createContiguous(SdBaseFile* dirFile,
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const char* path, uint32_t size) {
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uint32_t count;
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// don't allow zero length file
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if (size == 0) goto fail;
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if (!open(dirFile, path, O_CREAT | O_EXCL | O_RDWR)) goto fail;
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// calculate number of clusters needed
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count = ((size - 1) >> (vol_->clusterSizeShift_ + 9)) + 1;
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// allocate clusters
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if (!vol_->allocContiguous(count, &firstCluster_)) {
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remove();
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goto fail;
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}
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fileSize_ = size;
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// insure sync() will update dir entry
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flags_ |= F_FILE_DIR_DIRTY;
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return sync();
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fail:
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return false;
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}
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//------------------------------------------------------------------------------
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/** Return a file's directory entry.
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*
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* \param[out] dir Location for return of the file's directory entry.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool SdBaseFile::dirEntry(dir_t* dir) {
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dir_t* p;
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// make sure fields on SD are correct
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if (!sync()) goto fail;
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// read entry
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p = cacheDirEntry(SdVolume::CACHE_FOR_READ);
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if (!p) goto fail;
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// copy to caller's struct
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memcpy(dir, p, sizeof(dir_t));
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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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/** Format the name field of \a dir into the 13 byte array
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* \a name in standard 8.3 short name format.
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*
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* \param[in] dir The directory structure containing the name.
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* \param[out] name A 13 byte char array for the formatted name.
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*/
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void SdBaseFile::dirName(const dir_t& dir, char* name) {
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uint8_t j = 0;
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for (uint8_t i = 0; i < 11; i++) {
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if (dir.name[i] == ' ')continue;
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if (i == 8) name[j++] = '.';
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name[j++] = dir.name[i];
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}
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name[j] = 0;
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}
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//------------------------------------------------------------------------------
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/** Test for the existence of a file in a directory
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*
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* \param[in] name Name of the file to be tested for.
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*
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* The calling instance must be an open directory file.
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*
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* dirFile.exists("TOFIND.TXT") searches for "TOFIND.TXT" in the directory
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* dirFile.
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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 SdBaseFile::exists(const char* name) {
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SdBaseFile file;
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return file.open(this, name, O_READ);
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}
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//------------------------------------------------------------------------------
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/**
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* Get a string from a file.
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*
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* fgets() reads bytes from a file into the array pointed to by \a str, until
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* \a num - 1 bytes are read, or a delimiter is read and transferred to \a str,
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* or end-of-file is encountered. The string is then terminated
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* with a null byte.
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*
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* fgets() deletes CR, '\\r', from the string. This insures only a '\\n'
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* terminates the string for Windows text files which use CRLF for newline.
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*
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* \param[out] str Pointer to the array where the string is stored.
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* \param[in] num Maximum number of characters to be read
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* (including the final null byte). Usually the length
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* of the array \a str is used.
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* \param[in] delim Optional set of delimiters. The default is "\n".
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*
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* \return For success fgets() returns the length of the string in \a str.
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* If no data is read, fgets() returns zero for EOF or -1 if an error occurred.
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**/
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int16_t SdBaseFile::fgets(char* str, int16_t num, char* delim) {
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char ch;
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int16_t n = 0;
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int16_t r = -1;
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while ((n + 1) < num && (r = read(&ch, 1)) == 1) {
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// delete CR
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if (ch == '\r') continue;
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str[n++] = ch;
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if (!delim) {
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if (ch == '\n') break;
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} else {
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if (strchr(delim, ch)) break;
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}
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}
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if (r < 0) {
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// read error
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return -1;
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}
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str[n] = '\0';
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return n;
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}
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//------------------------------------------------------------------------------
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/** Get a file's name
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*
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* \param[out] name An array of 13 characters for the file's name.
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*
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* \return The value one, true, is returned for success and
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* the value zero, false, is returned for failure.
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*/
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bool SdBaseFile::getFilename(char* name) {
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if (!isOpen()) return false;
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if (isRoot()) {
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name[0] = '/';
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name[1] = '\0';
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return true;
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}
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// cache entry
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dir_t* p = cacheDirEntry(SdVolume::CACHE_FOR_READ);
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if (!p) return false;
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// format name
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dirName(*p, name);
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return true;
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}
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//------------------------------------------------------------------------------
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void SdBaseFile::getpos(fpos_t* pos) {
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pos->position = curPosition_;
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pos->cluster = curCluster_;
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}
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//------------------------------------------------------------------------------
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/** List directory contents.
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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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* \param[in] indent Amount of space before file name. Used for recursive
|
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* list to indicate subdirectory level.
|
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*/
|
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void SdBaseFile::ls(uint8_t flags, uint8_t indent) {
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rewind();
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int8_t status;
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while ((status = lsPrintNext( flags, indent))) {
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if (status > 1 && (flags & LS_R)) {
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uint16_t index = curPosition()/32 - 1;
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SdBaseFile s;
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if (s.open(this, index, O_READ)) s.ls( flags, indent + 2);
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seekSet(32 * (index + 1));
|
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}
|
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}
|
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}
|
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//------------------------------------------------------------------------------
|
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// saves 32 bytes on stack for ls recursion
|
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// return 0 - EOF, 1 - normal file, or 2 - directory
|
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int8_t SdBaseFile::lsPrintNext( uint8_t flags, uint8_t indent) {
|
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dir_t dir;
|
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uint8_t w = 0;
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|
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while (1) {
|
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if (read(&dir, sizeof(dir)) != sizeof(dir)) return 0;
|
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if (dir.name[0] == DIR_NAME_FREE) return 0;
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|
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// skip deleted entry and entries for . and ..
|
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if (dir.name[0] != DIR_NAME_DELETED && dir.name[0] != '.'
|
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&& DIR_IS_FILE_OR_SUBDIR(&dir)) break;
|
|
}
|
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// indent for dir level
|
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for (uint8_t i = 0; i < indent; i++) MYSERIAL.write(' ');
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|
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// print name
|
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for (uint8_t i = 0; i < 11; i++) {
|
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if (dir.name[i] == ' ')continue;
|
|
if (i == 8) {
|
|
MYSERIAL.write('.');
|
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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;
|
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uint8_t n = 7; // max index for part before dot
|
|
uint8_t i = 0;
|
|
// blank fill name and extension
|
|
while (i < 11) name[i++] = ' ';
|
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i = 0;
|
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while (*str != '\0' && *str != '/') {
|
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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() {
|
|
fpos_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
|
|
if (nbyte >= (fileSize_ - curPosition_)) {
|
|
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
|
|
if (n > (512 - offset)) 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 directory entry from a directory file.
|
|
*
|
|
* \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 actual filename.
|
|
if (DIR_IS_LONG_NAME(dir) && longFilename != NULL)
|
|
{
|
|
vfat_t *VFAT = (vfat_t*)dir;
|
|
//Sanity check the VFAT entry. The first cluster is always set to zero. And th esequence number should be higher then 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;
|
|
longFilename[n+0] = VFAT->name1[0];
|
|
longFilename[n+1] = VFAT->name1[1];
|
|
longFilename[n+2] = VFAT->name1[2];
|
|
longFilename[n+3] = VFAT->name1[3];
|
|
longFilename[n+4] = VFAT->name1[4];
|
|
longFilename[n+5] = VFAT->name2[0];
|
|
longFilename[n+6] = VFAT->name2[1];
|
|
longFilename[n+7] = VFAT->name2[2];
|
|
longFilename[n+8] = VFAT->name2[3];
|
|
longFilename[n+9] = VFAT->name2[4];
|
|
longFilename[n+10] = VFAT->name2[5];
|
|
longFilename[n+11] = VFAT->name3[0];
|
|
longFilename[n+12] = VFAT->name3[1];
|
|
//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(fpos_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
|
|
if (n > nToWrite) 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
|