Fanny Calle / SDFileSystem

this library has few changes from the original library, for effects of this work.

Dependents:   OBC3_1_h

FATFileSystem/FATFileHandle.cpp@0:8214896432e0, 2018-05-21 (annotated)

Committer:
FannyCalle
Date:
Mon May 21 15:10:37 2018 +0000
Revision:
0:8214896432e0
el sd hay que revisar;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
FannyCalle 0:8214896432e0 1 /* mbed Microcontroller Library
FannyCalle 0:8214896432e0 2 * Copyright (c) 2006-2012 ARM Limited
FannyCalle 0:8214896432e0 3 *
FannyCalle 0:8214896432e0 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
FannyCalle 0:8214896432e0 5 * of this software and associated documentation files (the "Software"), to deal
FannyCalle 0:8214896432e0 6 * in the Software without restriction, including without limitation the rights
FannyCalle 0:8214896432e0 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
FannyCalle 0:8214896432e0 8 * copies of the Software, and to permit persons to whom the Software is
FannyCalle 0:8214896432e0 9 * furnished to do so, subject to the following conditions:
FannyCalle 0:8214896432e0 10 *
FannyCalle 0:8214896432e0 11 * The above copyright notice and this permission notice shall be included in
FannyCalle 0:8214896432e0 12 * all copies or substantial portions of the Software.
FannyCalle 0:8214896432e0 13 *
FannyCalle 0:8214896432e0 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
FannyCalle 0:8214896432e0 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FannyCalle 0:8214896432e0 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
FannyCalle 0:8214896432e0 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
FannyCalle 0:8214896432e0 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
FannyCalle 0:8214896432e0 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
FannyCalle 0:8214896432e0 20 * SOFTWARE.
FannyCalle 0:8214896432e0 21 */
FannyCalle 0:8214896432e0 22 #include "ff.h"
FannyCalle 0:8214896432e0 23 #include "ffconf.h"
FannyCalle 0:8214896432e0 24 #include "mbed_debug.h"
FannyCalle 0:8214896432e0 25
FannyCalle 0:8214896432e0 26 #include "FATFileHandle.h"
FannyCalle 0:8214896432e0 27
FannyCalle 0:8214896432e0 28 FATFileHandle::FATFileHandle(FIL fh) {
FannyCalle 0:8214896432e0 29 _fh = fh;
FannyCalle 0:8214896432e0 30 }
FannyCalle 0:8214896432e0 31
FannyCalle 0:8214896432e0 32 int FATFileHandle::close() {
FannyCalle 0:8214896432e0 33 int retval = f_close(&_fh);
FannyCalle 0:8214896432e0 34 delete this;
FannyCalle 0:8214896432e0 35 return retval;
FannyCalle 0:8214896432e0 36 }
FannyCalle 0:8214896432e0 37
FannyCalle 0:8214896432e0 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
FannyCalle 0:8214896432e0 39 UINT n;
FannyCalle 0:8214896432e0 40 FRESULT res = f_write(&_fh, buffer, length, &n);
FannyCalle 0:8214896432e0 41 if (res) {
FannyCalle 0:8214896432e0 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
FannyCalle 0:8214896432e0 43 return -1;
FannyCalle 0:8214896432e0 44 }
FannyCalle 0:8214896432e0 45 return n;
FannyCalle 0:8214896432e0 46 }
FannyCalle 0:8214896432e0 47
FannyCalle 0:8214896432e0 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
FannyCalle 0:8214896432e0 49 debug_if(FFS_DBG, "read(%d)\n", length);
FannyCalle 0:8214896432e0 50 UINT n;
FannyCalle 0:8214896432e0 51 FRESULT res = f_read(&_fh, buffer, length, &n);
FannyCalle 0:8214896432e0 52 if (res) {
FannyCalle 0:8214896432e0 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
FannyCalle 0:8214896432e0 54 return -1;
FannyCalle 0:8214896432e0 55 }
FannyCalle 0:8214896432e0 56 return n;
FannyCalle 0:8214896432e0 57 }
FannyCalle 0:8214896432e0 58
FannyCalle 0:8214896432e0 59 int FATFileHandle::isatty() {
FannyCalle 0:8214896432e0 60 return 0;
FannyCalle 0:8214896432e0 61 }
FannyCalle 0:8214896432e0 62
FannyCalle 0:8214896432e0 63 off_t FATFileHandle::lseek(off_t position, int whence) {
FannyCalle 0:8214896432e0 64 if (whence == SEEK_END) {
FannyCalle 0:8214896432e0 65 position += _fh.fsize;
FannyCalle 0:8214896432e0 66 } else if(whence==SEEK_CUR) {
FannyCalle 0:8214896432e0 67 position += _fh.fptr;
FannyCalle 0:8214896432e0 68 }
FannyCalle 0:8214896432e0 69 FRESULT res = f_lseek(&_fh, position);
FannyCalle 0:8214896432e0 70 if (res) {
FannyCalle 0:8214896432e0 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
FannyCalle 0:8214896432e0 72 return -1;
FannyCalle 0:8214896432e0 73 } else {
FannyCalle 0:8214896432e0 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
FannyCalle 0:8214896432e0 75 return _fh.fptr;
FannyCalle 0:8214896432e0 76 }
FannyCalle 0:8214896432e0 77 }
FannyCalle 0:8214896432e0 78
FannyCalle 0:8214896432e0 79 int FATFileHandle::fsync() {
FannyCalle 0:8214896432e0 80 FRESULT res = f_sync(&_fh);
FannyCalle 0:8214896432e0 81 if (res) {
FannyCalle 0:8214896432e0 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
FannyCalle 0:8214896432e0 83 return -1;
FannyCalle 0:8214896432e0 84 }
FannyCalle 0:8214896432e0 85 return 0;
FannyCalle 0:8214896432e0 86 }
FannyCalle 0:8214896432e0 87
FannyCalle 0:8214896432e0 88 off_t FATFileHandle::flen() {
FannyCalle 0:8214896432e0 89 return _fh.fsize;
FannyCalle 0:8214896432e0 90 }