megan gimple / SDFileSystem

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Dependents:   gimple_A4_3_Temp_Light

FATFileSystem/FATFileHandle.cpp@0:07ff9ae5339f, 2021-11-13 (annotated)

Committer:
mgimple
Date:
Sat Nov 13 20:10:05 2021 +0000
Revision:
0:07ff9ae5339f
SD

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mgimple 0:07ff9ae5339f 1 /* mbed Microcontroller Library
mgimple 0:07ff9ae5339f 2 * Copyright (c) 2006-2012 ARM Limited
mgimple 0:07ff9ae5339f 3 *
mgimple 0:07ff9ae5339f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mgimple 0:07ff9ae5339f 5 * of this software and associated documentation files (the "Software"), to deal
mgimple 0:07ff9ae5339f 6 * in the Software without restriction, including without limitation the rights
mgimple 0:07ff9ae5339f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mgimple 0:07ff9ae5339f 8 * copies of the Software, and to permit persons to whom the Software is
mgimple 0:07ff9ae5339f 9 * furnished to do so, subject to the following conditions:
mgimple 0:07ff9ae5339f 10 *
mgimple 0:07ff9ae5339f 11 * The above copyright notice and this permission notice shall be included in
mgimple 0:07ff9ae5339f 12 * all copies or substantial portions of the Software.
mgimple 0:07ff9ae5339f 13 *
mgimple 0:07ff9ae5339f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mgimple 0:07ff9ae5339f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mgimple 0:07ff9ae5339f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mgimple 0:07ff9ae5339f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mgimple 0:07ff9ae5339f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mgimple 0:07ff9ae5339f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mgimple 0:07ff9ae5339f 20 * SOFTWARE.
mgimple 0:07ff9ae5339f 21 */
mgimple 0:07ff9ae5339f 22 #include "ff.h"
mgimple 0:07ff9ae5339f 23 #include "ffconf.h"
mgimple 0:07ff9ae5339f 24 #include "mbed_debug.h"
mgimple 0:07ff9ae5339f 25
mgimple 0:07ff9ae5339f 26 #include "FATFileHandle.h"
mgimple 0:07ff9ae5339f 27
mgimple 0:07ff9ae5339f 28 FATFileHandle::FATFileHandle(FIL fh) {
mgimple 0:07ff9ae5339f 29 _fh = fh;
mgimple 0:07ff9ae5339f 30 }
mgimple 0:07ff9ae5339f 31
mgimple 0:07ff9ae5339f 32 int FATFileHandle::close() {
mgimple 0:07ff9ae5339f 33 int retval = f_close(&_fh);
mgimple 0:07ff9ae5339f 34 delete this;
mgimple 0:07ff9ae5339f 35 return retval;
mgimple 0:07ff9ae5339f 36 }
mgimple 0:07ff9ae5339f 37
mgimple 0:07ff9ae5339f 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
mgimple 0:07ff9ae5339f 39 UINT n;
mgimple 0:07ff9ae5339f 40 FRESULT res = f_write(&_fh, buffer, length, &n);
mgimple 0:07ff9ae5339f 41 if (res) {
mgimple 0:07ff9ae5339f 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
mgimple 0:07ff9ae5339f 43 return -1;
mgimple 0:07ff9ae5339f 44 }
mgimple 0:07ff9ae5339f 45 return n;
mgimple 0:07ff9ae5339f 46 }
mgimple 0:07ff9ae5339f 47
mgimple 0:07ff9ae5339f 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
mgimple 0:07ff9ae5339f 49 debug_if(FFS_DBG, "read(%d)\n", length);
mgimple 0:07ff9ae5339f 50 UINT n;
mgimple 0:07ff9ae5339f 51 FRESULT res = f_read(&_fh, buffer, length, &n);
mgimple 0:07ff9ae5339f 52 if (res) {
mgimple 0:07ff9ae5339f 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
mgimple 0:07ff9ae5339f 54 return -1;
mgimple 0:07ff9ae5339f 55 }
mgimple 0:07ff9ae5339f 56 return n;
mgimple 0:07ff9ae5339f 57 }
mgimple 0:07ff9ae5339f 58
mgimple 0:07ff9ae5339f 59 int FATFileHandle::isatty() {
mgimple 0:07ff9ae5339f 60 return 0;
mgimple 0:07ff9ae5339f 61 }
mgimple 0:07ff9ae5339f 62
mgimple 0:07ff9ae5339f 63 off_t FATFileHandle::lseek(off_t position, int whence) {
mgimple 0:07ff9ae5339f 64 if (whence == SEEK_END) {
mgimple 0:07ff9ae5339f 65 position += _fh.fsize;
mgimple 0:07ff9ae5339f 66 } else if(whence==SEEK_CUR) {
mgimple 0:07ff9ae5339f 67 position += _fh.fptr;
mgimple 0:07ff9ae5339f 68 }
mgimple 0:07ff9ae5339f 69 FRESULT res = f_lseek(&_fh, position);
mgimple 0:07ff9ae5339f 70 if (res) {
mgimple 0:07ff9ae5339f 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
mgimple 0:07ff9ae5339f 72 return -1;
mgimple 0:07ff9ae5339f 73 } else {
mgimple 0:07ff9ae5339f 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
mgimple 0:07ff9ae5339f 75 return _fh.fptr;
mgimple 0:07ff9ae5339f 76 }
mgimple 0:07ff9ae5339f 77 }
mgimple 0:07ff9ae5339f 78
mgimple 0:07ff9ae5339f 79 int FATFileHandle::fsync() {
mgimple 0:07ff9ae5339f 80 FRESULT res = f_sync(&_fh);
mgimple 0:07ff9ae5339f 81 if (res) {
mgimple 0:07ff9ae5339f 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
mgimple 0:07ff9ae5339f 83 return -1;
mgimple 0:07ff9ae5339f 84 }
mgimple 0:07ff9ae5339f 85 return 0;
mgimple 0:07ff9ae5339f 86 }
mgimple 0:07ff9ae5339f 87
mgimple 0:07ff9ae5339f 88 off_t FATFileHandle::flen() {
mgimple 0:07ff9ae5339f 89 return _fh.fsize;
mgimple 0:07ff9ae5339f 90 }