ELEC2645 (2019/20) / Mbed 2 deprecated ELEC2645_PROJECT_EL18KK

Kaif Kutchwala 201267448 ELEC2645 Project

Dependencies:   mbed

SDFileSystem/FATFileSystem/FATFileHandle.cpp@31:e1f80d181779, 2020-05-26 (annotated)

Committer:
KaifK
Date:
Tue May 26 15:50:46 2020 +0000
Revision:
31:e1f80d181779
Parent:
21:d5b1160f349f 
Final Submission. I have read and agreed with Statement of Academic Integrity.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
KaifK 21:d5b1160f349f 1 /* mbed Microcontroller Library
KaifK 21:d5b1160f349f 2 * Copyright (c) 2006-2012 ARM Limited
KaifK 21:d5b1160f349f 3 *
KaifK 21:d5b1160f349f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
KaifK 21:d5b1160f349f 5 * of this software and associated documentation files (the "Software"), to deal
KaifK 21:d5b1160f349f 6 * in the Software without restriction, including without limitation the rights
KaifK 21:d5b1160f349f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
KaifK 21:d5b1160f349f 8 * copies of the Software, and to permit persons to whom the Software is
KaifK 21:d5b1160f349f 9 * furnished to do so, subject to the following conditions:
KaifK 21:d5b1160f349f 10 *
KaifK 21:d5b1160f349f 11 * The above copyright notice and this permission notice shall be included in
KaifK 21:d5b1160f349f 12 * all copies or substantial portions of the Software.
KaifK 21:d5b1160f349f 13 *
KaifK 21:d5b1160f349f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
KaifK 21:d5b1160f349f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
KaifK 21:d5b1160f349f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
KaifK 21:d5b1160f349f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
KaifK 21:d5b1160f349f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
KaifK 21:d5b1160f349f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
KaifK 21:d5b1160f349f 20 * SOFTWARE.
KaifK 21:d5b1160f349f 21 */
KaifK 21:d5b1160f349f 22 #include "ff.h"
KaifK 21:d5b1160f349f 23 #include "ffconf.h"
KaifK 21:d5b1160f349f 24 #include "mbed_debug.h"
KaifK 21:d5b1160f349f 25
KaifK 21:d5b1160f349f 26 #include "FATFileHandle.h"
KaifK 21:d5b1160f349f 27
KaifK 21:d5b1160f349f 28 FATFileHandle::FATFileHandle(FIL fh) {
KaifK 21:d5b1160f349f 29 _fh = fh;
KaifK 21:d5b1160f349f 30 }
KaifK 21:d5b1160f349f 31
KaifK 21:d5b1160f349f 32 int FATFileHandle::close() {
KaifK 21:d5b1160f349f 33 int retval = f_close(&_fh);
KaifK 21:d5b1160f349f 34 delete this;
KaifK 21:d5b1160f349f 35 return retval;
KaifK 21:d5b1160f349f 36 }
KaifK 21:d5b1160f349f 37
KaifK 21:d5b1160f349f 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
KaifK 21:d5b1160f349f 39 UINT n;
KaifK 21:d5b1160f349f 40 FRESULT res = f_write(&_fh, buffer, length, &n);
KaifK 21:d5b1160f349f 41 if (res) {
KaifK 21:d5b1160f349f 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
KaifK 21:d5b1160f349f 43 return -1;
KaifK 21:d5b1160f349f 44 }
KaifK 21:d5b1160f349f 45 return n;
KaifK 21:d5b1160f349f 46 }
KaifK 21:d5b1160f349f 47
KaifK 21:d5b1160f349f 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
KaifK 21:d5b1160f349f 49 debug_if(FFS_DBG, "read(%d)\n", length);
KaifK 21:d5b1160f349f 50 UINT n;
KaifK 21:d5b1160f349f 51 FRESULT res = f_read(&_fh, buffer, length, &n);
KaifK 21:d5b1160f349f 52 if (res) {
KaifK 21:d5b1160f349f 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
KaifK 21:d5b1160f349f 54 return -1;
KaifK 21:d5b1160f349f 55 }
KaifK 21:d5b1160f349f 56 return n;
KaifK 21:d5b1160f349f 57 }
KaifK 21:d5b1160f349f 58
KaifK 21:d5b1160f349f 59 int FATFileHandle::isatty() {
KaifK 21:d5b1160f349f 60 return 0;
KaifK 21:d5b1160f349f 61 }
KaifK 21:d5b1160f349f 62
KaifK 21:d5b1160f349f 63 off_t FATFileHandle::lseek(off_t position, int whence) {
KaifK 21:d5b1160f349f 64 if (whence == SEEK_END) {
KaifK 21:d5b1160f349f 65 position += _fh.fsize;
KaifK 21:d5b1160f349f 66 } else if(whence==SEEK_CUR) {
KaifK 21:d5b1160f349f 67 position += _fh.fptr;
KaifK 21:d5b1160f349f 68 }
KaifK 21:d5b1160f349f 69 FRESULT res = f_lseek(&_fh, position);
KaifK 21:d5b1160f349f 70 if (res) {
KaifK 21:d5b1160f349f 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
KaifK 21:d5b1160f349f 72 return -1;
KaifK 21:d5b1160f349f 73 } else {
KaifK 21:d5b1160f349f 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
KaifK 21:d5b1160f349f 75 return _fh.fptr;
KaifK 21:d5b1160f349f 76 }
KaifK 21:d5b1160f349f 77 }
KaifK 21:d5b1160f349f 78
KaifK 21:d5b1160f349f 79 int FATFileHandle::fsync() {
KaifK 21:d5b1160f349f 80 FRESULT res = f_sync(&_fh);
KaifK 21:d5b1160f349f 81 if (res) {
KaifK 21:d5b1160f349f 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
KaifK 21:d5b1160f349f 83 return -1;
KaifK 21:d5b1160f349f 84 }
KaifK 21:d5b1160f349f 85 return 0;
KaifK 21:d5b1160f349f 86 }
KaifK 21:d5b1160f349f 87
KaifK 21:d5b1160f349f 88 off_t FATFileHandle::flen() {
KaifK 21:d5b1160f349f 89 return _fh.fsize;
KaifK 21:d5b1160f349f 90 }