Jordan Beason / FATDirHandle1

Final

FATFileHandle.cpp@0:e126ae11d20b, 2019-11-06 (annotated)

Committer:
jbeason3
Date:
Wed Nov 06 04:53:44 2019 +0000
Revision:
0:e126ae11d20b
Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jbeason3 0:e126ae11d20b 1 /* mbed Microcontroller Library
jbeason3 0:e126ae11d20b 2 * Copyright (c) 2006-2012 ARM Limited
jbeason3 0:e126ae11d20b 3 *
jbeason3 0:e126ae11d20b 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
jbeason3 0:e126ae11d20b 5 * of this software and associated documentation files (the "Software"), to deal
jbeason3 0:e126ae11d20b 6 * in the Software without restriction, including without limitation the rights
jbeason3 0:e126ae11d20b 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
jbeason3 0:e126ae11d20b 8 * copies of the Software, and to permit persons to whom the Software is
jbeason3 0:e126ae11d20b 9 * furnished to do so, subject to the following conditions:
jbeason3 0:e126ae11d20b 10 *
jbeason3 0:e126ae11d20b 11 * The above copyright notice and this permission notice shall be included in
jbeason3 0:e126ae11d20b 12 * all copies or substantial portions of the Software.
jbeason3 0:e126ae11d20b 13 *
jbeason3 0:e126ae11d20b 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
jbeason3 0:e126ae11d20b 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
jbeason3 0:e126ae11d20b 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
jbeason3 0:e126ae11d20b 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
jbeason3 0:e126ae11d20b 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
jbeason3 0:e126ae11d20b 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
jbeason3 0:e126ae11d20b 20 * SOFTWARE.
jbeason3 0:e126ae11d20b 21 */
jbeason3 0:e126ae11d20b 22 #include "ff.h"
jbeason3 0:e126ae11d20b 23 #include "ffconf.h"
jbeason3 0:e126ae11d20b 24 #include "mbed_debug.h"
jbeason3 0:e126ae11d20b 25
jbeason3 0:e126ae11d20b 26 #include "FATFileHandle.h"
jbeason3 0:e126ae11d20b 27
jbeason3 0:e126ae11d20b 28 FATFileHandle::FATFileHandle(FIL fh) {
jbeason3 0:e126ae11d20b 29 _fh = fh;
jbeason3 0:e126ae11d20b 30 }
jbeason3 0:e126ae11d20b 31
jbeason3 0:e126ae11d20b 32 int FATFileHandle::close() {
jbeason3 0:e126ae11d20b 33 int retval = f_close(&_fh);
jbeason3 0:e126ae11d20b 34 delete this;
jbeason3 0:e126ae11d20b 35 return retval;
jbeason3 0:e126ae11d20b 36 }
jbeason3 0:e126ae11d20b 37
jbeason3 0:e126ae11d20b 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
jbeason3 0:e126ae11d20b 39 UINT n;
jbeason3 0:e126ae11d20b 40 FRESULT res = f_write(&_fh, buffer, length, &n);
jbeason3 0:e126ae11d20b 41 if (res) {
jbeason3 0:e126ae11d20b 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
jbeason3 0:e126ae11d20b 43 return -1;
jbeason3 0:e126ae11d20b 44 }
jbeason3 0:e126ae11d20b 45 return n;
jbeason3 0:e126ae11d20b 46 }
jbeason3 0:e126ae11d20b 47
jbeason3 0:e126ae11d20b 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
jbeason3 0:e126ae11d20b 49 debug_if(FFS_DBG, "read(%d)\n", length);
jbeason3 0:e126ae11d20b 50 UINT n;
jbeason3 0:e126ae11d20b 51 FRESULT res = f_read(&_fh, buffer, length, &n);
jbeason3 0:e126ae11d20b 52 if (res) {
jbeason3 0:e126ae11d20b 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
jbeason3 0:e126ae11d20b 54 return -1;
jbeason3 0:e126ae11d20b 55 }
jbeason3 0:e126ae11d20b 56 return n;
jbeason3 0:e126ae11d20b 57 }
jbeason3 0:e126ae11d20b 58
jbeason3 0:e126ae11d20b 59 int FATFileHandle::isatty() {
jbeason3 0:e126ae11d20b 60 return 0;
jbeason3 0:e126ae11d20b 61 }
jbeason3 0:e126ae11d20b 62
jbeason3 0:e126ae11d20b 63 off_t FATFileHandle::lseek(off_t position, int whence) {
jbeason3 0:e126ae11d20b 64 if (whence == SEEK_END) {
jbeason3 0:e126ae11d20b 65 position += _fh.fsize;
jbeason3 0:e126ae11d20b 66 } else if(whence==SEEK_CUR) {
jbeason3 0:e126ae11d20b 67 position += _fh.fptr;
jbeason3 0:e126ae11d20b 68 }
jbeason3 0:e126ae11d20b 69 FRESULT res = f_lseek(&_fh, position);
jbeason3 0:e126ae11d20b 70 if (res) {
jbeason3 0:e126ae11d20b 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
jbeason3 0:e126ae11d20b 72 return -1;
jbeason3 0:e126ae11d20b 73 } else {
jbeason3 0:e126ae11d20b 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
jbeason3 0:e126ae11d20b 75 return _fh.fptr;
jbeason3 0:e126ae11d20b 76 }
jbeason3 0:e126ae11d20b 77 }
jbeason3 0:e126ae11d20b 78
jbeason3 0:e126ae11d20b 79 int FATFileHandle::fsync() {
jbeason3 0:e126ae11d20b 80 FRESULT res = f_sync(&_fh);
jbeason3 0:e126ae11d20b 81 if (res) {
jbeason3 0:e126ae11d20b 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
jbeason3 0:e126ae11d20b 83 return -1;
jbeason3 0:e126ae11d20b 84 }
jbeason3 0:e126ae11d20b 85 return 0;
jbeason3 0:e126ae11d20b 86 }
jbeason3 0:e126ae11d20b 87
jbeason3 0:e126ae11d20b 88 off_t FATFileHandle::flen() {
jbeason3 0:e126ae11d20b 89 return _fh.fsize;
jbeason3 0:e126ae11d20b 90 }