Super Awesome Gimbal Project Team Dot Com / FATFileSystem

Fork of FATEFileSystem

Fork of FATFileSystem by mbed official

FATFileHandle.cpp@10:7fba98857202, 2017-04-13 (annotated)

Committer:
brandonthompson
Date:
Thu Apr 13 14:33:40 2017 +0000
Revision:
10:7fba98857202
Parent:
4:3ff2606d5713
Child:
8:c4baca9a2c3d
BrandoFork

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 1:46ce1e16c870 1 /* mbed Microcontroller Library
emilmont 1:46ce1e16c870 2 * Copyright (c) 2006-2012 ARM Limited
emilmont 1:46ce1e16c870 3 *
emilmont 1:46ce1e16c870 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emilmont 1:46ce1e16c870 5 * of this software and associated documentation files (the "Software"), to deal
emilmont 1:46ce1e16c870 6 * in the Software without restriction, including without limitation the rights
emilmont 1:46ce1e16c870 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emilmont 1:46ce1e16c870 8 * copies of the Software, and to permit persons to whom the Software is
emilmont 1:46ce1e16c870 9 * furnished to do so, subject to the following conditions:
emilmont 1:46ce1e16c870 10 *
emilmont 1:46ce1e16c870 11 * The above copyright notice and this permission notice shall be included in
emilmont 1:46ce1e16c870 12 * all copies or substantial portions of the Software.
emilmont 1:46ce1e16c870 13 *
emilmont 1:46ce1e16c870 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emilmont 1:46ce1e16c870 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emilmont 1:46ce1e16c870 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emilmont 1:46ce1e16c870 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emilmont 1:46ce1e16c870 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emilmont 1:46ce1e16c870 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emilmont 1:46ce1e16c870 20 * SOFTWARE.
emilmont 1:46ce1e16c870 21 */
emilmont 1:46ce1e16c870 22 #include "ff.h"
emilmont 1:46ce1e16c870 23 #include "ffconf.h"
emilmont 2:b6669c987c8e 24 #include "mbed_debug.h"
emilmont 1:46ce1e16c870 25
emilmont 1:46ce1e16c870 26 #include "FATFileHandle.h"
emilmont 1:46ce1e16c870 27
emilmont 1:46ce1e16c870 28 FATFileHandle::FATFileHandle(FIL fh) {
emilmont 1:46ce1e16c870 29 _fh = fh;
emilmont 1:46ce1e16c870 30 }
emilmont 1:46ce1e16c870 31
emilmont 1:46ce1e16c870 32 int FATFileHandle::close() {
emilmont 1:46ce1e16c870 33 int retval = f_close(&_fh);
emilmont 1:46ce1e16c870 34 delete this;
emilmont 1:46ce1e16c870 35 return retval;
emilmont 1:46ce1e16c870 36 }
emilmont 1:46ce1e16c870 37
emilmont 1:46ce1e16c870 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
emilmont 1:46ce1e16c870 39 UINT n;
emilmont 1:46ce1e16c870 40 FRESULT res = f_write(&_fh, buffer, length, &n);
mbed_official 4:3ff2606d5713 41 if (res) {
emilmont 1:46ce1e16c870 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
emilmont 1:46ce1e16c870 43 return -1;
emilmont 1:46ce1e16c870 44 }
emilmont 1:46ce1e16c870 45 return n;
emilmont 1:46ce1e16c870 46 }
mbed_official 4:3ff2606d5713 47
emilmont 1:46ce1e16c870 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
emilmont 1:46ce1e16c870 49 debug_if(FFS_DBG, "read(%d)\n", length);
emilmont 1:46ce1e16c870 50 UINT n;
emilmont 1:46ce1e16c870 51 FRESULT res = f_read(&_fh, buffer, length, &n);
emilmont 1:46ce1e16c870 52 if (res) {
emilmont 1:46ce1e16c870 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
emilmont 1:46ce1e16c870 54 return -1;
emilmont 1:46ce1e16c870 55 }
emilmont 1:46ce1e16c870 56 return n;
emilmont 1:46ce1e16c870 57 }
emilmont 1:46ce1e16c870 58
emilmont 1:46ce1e16c870 59 int FATFileHandle::isatty() {
emilmont 1:46ce1e16c870 60 return 0;
emilmont 1:46ce1e16c870 61 }
emilmont 1:46ce1e16c870 62
emilmont 1:46ce1e16c870 63 off_t FATFileHandle::lseek(off_t position, int whence) {
emilmont 1:46ce1e16c870 64 if (whence == SEEK_END) {
emilmont 1:46ce1e16c870 65 position += _fh.fsize;
emilmont 1:46ce1e16c870 66 } else if(whence==SEEK_CUR) {
emilmont 1:46ce1e16c870 67 position += _fh.fptr;
emilmont 1:46ce1e16c870 68 }
emilmont 1:46ce1e16c870 69 FRESULT res = f_lseek(&_fh, position);
emilmont 1:46ce1e16c870 70 if (res) {
emilmont 1:46ce1e16c870 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
emilmont 1:46ce1e16c870 72 return -1;
emilmont 1:46ce1e16c870 73 } else {
emilmont 1:46ce1e16c870 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
emilmont 1:46ce1e16c870 75 return _fh.fptr;
emilmont 1:46ce1e16c870 76 }
emilmont 1:46ce1e16c870 77 }
emilmont 1:46ce1e16c870 78
emilmont 1:46ce1e16c870 79 int FATFileHandle::fsync() {
emilmont 1:46ce1e16c870 80 FRESULT res = f_sync(&_fh);
emilmont 1:46ce1e16c870 81 if (res) {
emilmont 1:46ce1e16c870 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
emilmont 1:46ce1e16c870 83 return -1;
emilmont 1:46ce1e16c870 84 }
emilmont 1:46ce1e16c870 85 return 0;
emilmont 1:46ce1e16c870 86 }
emilmont 1:46ce1e16c870 87
emilmont 1:46ce1e16c870 88 off_t FATFileHandle::flen() {
emilmont 1:46ce1e16c870 89 return _fh.fsize;
emilmont 1:46ce1e16c870 90 }