Alek Boving / SDFileSystemproject

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FATFileSystem/FATFileHandle.cpp@0:bbe70de9c5dd, 2020-12-01 (annotated)

Committer:
alekboving
Date:
Tue Dec 01 15:02:06 2020 +0000
Revision:
0:bbe70de9c5dd
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alekboving 0:bbe70de9c5dd 1 /* mbed Microcontroller Library
alekboving 0:bbe70de9c5dd 2 * Copyright (c) 2006-2012 ARM Limited
alekboving 0:bbe70de9c5dd 3 *
alekboving 0:bbe70de9c5dd 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
alekboving 0:bbe70de9c5dd 5 * of this software and associated documentation files (the "Software"), to deal
alekboving 0:bbe70de9c5dd 6 * in the Software without restriction, including without limitation the rights
alekboving 0:bbe70de9c5dd 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
alekboving 0:bbe70de9c5dd 8 * copies of the Software, and to permit persons to whom the Software is
alekboving 0:bbe70de9c5dd 9 * furnished to do so, subject to the following conditions:
alekboving 0:bbe70de9c5dd 10 *
alekboving 0:bbe70de9c5dd 11 * The above copyright notice and this permission notice shall be included in
alekboving 0:bbe70de9c5dd 12 * all copies or substantial portions of the Software.
alekboving 0:bbe70de9c5dd 13 *
alekboving 0:bbe70de9c5dd 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
alekboving 0:bbe70de9c5dd 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
alekboving 0:bbe70de9c5dd 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
alekboving 0:bbe70de9c5dd 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
alekboving 0:bbe70de9c5dd 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
alekboving 0:bbe70de9c5dd 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
alekboving 0:bbe70de9c5dd 20 * SOFTWARE.
alekboving 0:bbe70de9c5dd 21 */
alekboving 0:bbe70de9c5dd 22 #include "ff.h"
alekboving 0:bbe70de9c5dd 23 #include "ffconf.h"
alekboving 0:bbe70de9c5dd 24 #include "mbed_debug.h"
alekboving 0:bbe70de9c5dd 25
alekboving 0:bbe70de9c5dd 26 #include "FATFileHandle.h"
alekboving 0:bbe70de9c5dd 27
alekboving 0:bbe70de9c5dd 28 FATFileHandle::FATFileHandle(FIL fh) {
alekboving 0:bbe70de9c5dd 29 _fh = fh;
alekboving 0:bbe70de9c5dd 30 }
alekboving 0:bbe70de9c5dd 31
alekboving 0:bbe70de9c5dd 32 int FATFileHandle::close() {
alekboving 0:bbe70de9c5dd 33 int retval = f_close(&_fh);
alekboving 0:bbe70de9c5dd 34 delete this;
alekboving 0:bbe70de9c5dd 35 return retval;
alekboving 0:bbe70de9c5dd 36 }
alekboving 0:bbe70de9c5dd 37
alekboving 0:bbe70de9c5dd 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
alekboving 0:bbe70de9c5dd 39 UINT n;
alekboving 0:bbe70de9c5dd 40 FRESULT res = f_write(&_fh, buffer, length, &n);
alekboving 0:bbe70de9c5dd 41 if (res) {
alekboving 0:bbe70de9c5dd 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
alekboving 0:bbe70de9c5dd 43 return -1;
alekboving 0:bbe70de9c5dd 44 }
alekboving 0:bbe70de9c5dd 45 return n;
alekboving 0:bbe70de9c5dd 46 }
alekboving 0:bbe70de9c5dd 47
alekboving 0:bbe70de9c5dd 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
alekboving 0:bbe70de9c5dd 49 debug_if(FFS_DBG, "read(%d)\n", length);
alekboving 0:bbe70de9c5dd 50 UINT n;
alekboving 0:bbe70de9c5dd 51 FRESULT res = f_read(&_fh, buffer, length, &n);
alekboving 0:bbe70de9c5dd 52 if (res) {
alekboving 0:bbe70de9c5dd 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
alekboving 0:bbe70de9c5dd 54 return -1;
alekboving 0:bbe70de9c5dd 55 }
alekboving 0:bbe70de9c5dd 56 return n;
alekboving 0:bbe70de9c5dd 57 }
alekboving 0:bbe70de9c5dd 58
alekboving 0:bbe70de9c5dd 59 int FATFileHandle::isatty() {
alekboving 0:bbe70de9c5dd 60 return 0;
alekboving 0:bbe70de9c5dd 61 }
alekboving 0:bbe70de9c5dd 62
alekboving 0:bbe70de9c5dd 63 off_t FATFileHandle::lseek(off_t position, int whence) {
alekboving 0:bbe70de9c5dd 64 if (whence == SEEK_END) {
alekboving 0:bbe70de9c5dd 65 position += _fh.fsize;
alekboving 0:bbe70de9c5dd 66 } else if(whence==SEEK_CUR) {
alekboving 0:bbe70de9c5dd 67 position += _fh.fptr;
alekboving 0:bbe70de9c5dd 68 }
alekboving 0:bbe70de9c5dd 69 FRESULT res = f_lseek(&_fh, position);
alekboving 0:bbe70de9c5dd 70 if (res) {
alekboving 0:bbe70de9c5dd 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
alekboving 0:bbe70de9c5dd 72 return -1;
alekboving 0:bbe70de9c5dd 73 } else {
alekboving 0:bbe70de9c5dd 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
alekboving 0:bbe70de9c5dd 75 return _fh.fptr;
alekboving 0:bbe70de9c5dd 76 }
alekboving 0:bbe70de9c5dd 77 }
alekboving 0:bbe70de9c5dd 78
alekboving 0:bbe70de9c5dd 79 int FATFileHandle::fsync() {
alekboving 0:bbe70de9c5dd 80 FRESULT res = f_sync(&_fh);
alekboving 0:bbe70de9c5dd 81 if (res) {
alekboving 0:bbe70de9c5dd 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
alekboving 0:bbe70de9c5dd 83 return -1;
alekboving 0:bbe70de9c5dd 84 }
alekboving 0:bbe70de9c5dd 85 return 0;
alekboving 0:bbe70de9c5dd 86 }
alekboving 0:bbe70de9c5dd 87
alekboving 0:bbe70de9c5dd 88 off_t FATFileHandle::flen() {
alekboving 0:bbe70de9c5dd 89 return _fh.fsize;
alekboving 0:bbe70de9c5dd 90 }