Emilia Marino / SDFileSystem

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

FATFileSystem/FATFileHandle.cpp@0:5f7b02d095c2, 2021-12-18 (annotated)

Committer:
emiliamarino
Date:
Sat Dec 18 20:17:31 2021 +0000
Revision:
0:5f7b02d095c2
Assignment 4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emiliamarino 0:5f7b02d095c2 1 /* mbed Microcontroller Library
emiliamarino 0:5f7b02d095c2 2 * Copyright (c) 2006-2012 ARM Limited
emiliamarino 0:5f7b02d095c2 3 *
emiliamarino 0:5f7b02d095c2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emiliamarino 0:5f7b02d095c2 5 * of this software and associated documentation files (the "Software"), to deal
emiliamarino 0:5f7b02d095c2 6 * in the Software without restriction, including without limitation the rights
emiliamarino 0:5f7b02d095c2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emiliamarino 0:5f7b02d095c2 8 * copies of the Software, and to permit persons to whom the Software is
emiliamarino 0:5f7b02d095c2 9 * furnished to do so, subject to the following conditions:
emiliamarino 0:5f7b02d095c2 10 *
emiliamarino 0:5f7b02d095c2 11 * The above copyright notice and this permission notice shall be included in
emiliamarino 0:5f7b02d095c2 12 * all copies or substantial portions of the Software.
emiliamarino 0:5f7b02d095c2 13 *
emiliamarino 0:5f7b02d095c2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emiliamarino 0:5f7b02d095c2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emiliamarino 0:5f7b02d095c2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emiliamarino 0:5f7b02d095c2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emiliamarino 0:5f7b02d095c2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emiliamarino 0:5f7b02d095c2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emiliamarino 0:5f7b02d095c2 20 * SOFTWARE.
emiliamarino 0:5f7b02d095c2 21 */
emiliamarino 0:5f7b02d095c2 22 #include "ff.h"
emiliamarino 0:5f7b02d095c2 23 #include "ffconf.h"
emiliamarino 0:5f7b02d095c2 24 #include "mbed_debug.h"
emiliamarino 0:5f7b02d095c2 25
emiliamarino 0:5f7b02d095c2 26 #include "FATFileHandle.h"
emiliamarino 0:5f7b02d095c2 27
emiliamarino 0:5f7b02d095c2 28 FATFileHandle::FATFileHandle(FIL fh) {
emiliamarino 0:5f7b02d095c2 29 _fh = fh;
emiliamarino 0:5f7b02d095c2 30 }
emiliamarino 0:5f7b02d095c2 31
emiliamarino 0:5f7b02d095c2 32 int FATFileHandle::close() {
emiliamarino 0:5f7b02d095c2 33 int retval = f_close(&_fh);
emiliamarino 0:5f7b02d095c2 34 delete this;
emiliamarino 0:5f7b02d095c2 35 return retval;
emiliamarino 0:5f7b02d095c2 36 }
emiliamarino 0:5f7b02d095c2 37
emiliamarino 0:5f7b02d095c2 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
emiliamarino 0:5f7b02d095c2 39 UINT n;
emiliamarino 0:5f7b02d095c2 40 FRESULT res = f_write(&_fh, buffer, length, &n);
emiliamarino 0:5f7b02d095c2 41 if (res) {
emiliamarino 0:5f7b02d095c2 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
emiliamarino 0:5f7b02d095c2 43 return -1;
emiliamarino 0:5f7b02d095c2 44 }
emiliamarino 0:5f7b02d095c2 45 return n;
emiliamarino 0:5f7b02d095c2 46 }
emiliamarino 0:5f7b02d095c2 47
emiliamarino 0:5f7b02d095c2 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
emiliamarino 0:5f7b02d095c2 49 debug_if(FFS_DBG, "read(%d)\n", length);
emiliamarino 0:5f7b02d095c2 50 UINT n;
emiliamarino 0:5f7b02d095c2 51 FRESULT res = f_read(&_fh, buffer, length, &n);
emiliamarino 0:5f7b02d095c2 52 if (res) {
emiliamarino 0:5f7b02d095c2 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
emiliamarino 0:5f7b02d095c2 54 return -1;
emiliamarino 0:5f7b02d095c2 55 }
emiliamarino 0:5f7b02d095c2 56 return n;
emiliamarino 0:5f7b02d095c2 57 }
emiliamarino 0:5f7b02d095c2 58
emiliamarino 0:5f7b02d095c2 59 int FATFileHandle::isatty() {
emiliamarino 0:5f7b02d095c2 60 return 0;
emiliamarino 0:5f7b02d095c2 61 }
emiliamarino 0:5f7b02d095c2 62
emiliamarino 0:5f7b02d095c2 63 off_t FATFileHandle::lseek(off_t position, int whence) {
emiliamarino 0:5f7b02d095c2 64 if (whence == SEEK_END) {
emiliamarino 0:5f7b02d095c2 65 position += _fh.fsize;
emiliamarino 0:5f7b02d095c2 66 } else if(whence==SEEK_CUR) {
emiliamarino 0:5f7b02d095c2 67 position += _fh.fptr;
emiliamarino 0:5f7b02d095c2 68 }
emiliamarino 0:5f7b02d095c2 69 FRESULT res = f_lseek(&_fh, position);
emiliamarino 0:5f7b02d095c2 70 if (res) {
emiliamarino 0:5f7b02d095c2 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
emiliamarino 0:5f7b02d095c2 72 return -1;
emiliamarino 0:5f7b02d095c2 73 } else {
emiliamarino 0:5f7b02d095c2 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
emiliamarino 0:5f7b02d095c2 75 return _fh.fptr;
emiliamarino 0:5f7b02d095c2 76 }
emiliamarino 0:5f7b02d095c2 77 }
emiliamarino 0:5f7b02d095c2 78
emiliamarino 0:5f7b02d095c2 79 int FATFileHandle::fsync() {
emiliamarino 0:5f7b02d095c2 80 FRESULT res = f_sync(&_fh);
emiliamarino 0:5f7b02d095c2 81 if (res) {
emiliamarino 0:5f7b02d095c2 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
emiliamarino 0:5f7b02d095c2 83 return -1;
emiliamarino 0:5f7b02d095c2 84 }
emiliamarino 0:5f7b02d095c2 85 return 0;
emiliamarino 0:5f7b02d095c2 86 }
emiliamarino 0:5f7b02d095c2 87
emiliamarino 0:5f7b02d095c2 88 off_t FATFileHandle::flen() {
emiliamarino 0:5f7b02d095c2 89 return _fh.fsize;
emiliamarino 0:5f7b02d095c2 90 }