Mark Schwarzer / SDFileSystem_A8

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FATFileSystem/FATFileHandle.cpp@0:a9d72fcb5d03, 2020-11-17 (annotated)

Committer:
markschwarzer
Date:
Tue Nov 17 20:28:59 2020 +0000
Revision:
0:a9d72fcb5d03
logs gps data to SD card

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markschwarzer 0:a9d72fcb5d03 1 /* mbed Microcontroller Library
markschwarzer 0:a9d72fcb5d03 2 * Copyright (c) 2006-2012 ARM Limited
markschwarzer 0:a9d72fcb5d03 3 *
markschwarzer 0:a9d72fcb5d03 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
markschwarzer 0:a9d72fcb5d03 5 * of this software and associated documentation files (the "Software"), to deal
markschwarzer 0:a9d72fcb5d03 6 * in the Software without restriction, including without limitation the rights
markschwarzer 0:a9d72fcb5d03 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
markschwarzer 0:a9d72fcb5d03 8 * copies of the Software, and to permit persons to whom the Software is
markschwarzer 0:a9d72fcb5d03 9 * furnished to do so, subject to the following conditions:
markschwarzer 0:a9d72fcb5d03 10 *
markschwarzer 0:a9d72fcb5d03 11 * The above copyright notice and this permission notice shall be included in
markschwarzer 0:a9d72fcb5d03 12 * all copies or substantial portions of the Software.
markschwarzer 0:a9d72fcb5d03 13 *
markschwarzer 0:a9d72fcb5d03 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
markschwarzer 0:a9d72fcb5d03 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
markschwarzer 0:a9d72fcb5d03 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
markschwarzer 0:a9d72fcb5d03 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
markschwarzer 0:a9d72fcb5d03 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
markschwarzer 0:a9d72fcb5d03 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
markschwarzer 0:a9d72fcb5d03 20 * SOFTWARE.
markschwarzer 0:a9d72fcb5d03 21 */
markschwarzer 0:a9d72fcb5d03 22 #include "ff.h"
markschwarzer 0:a9d72fcb5d03 23 #include "ffconf.h"
markschwarzer 0:a9d72fcb5d03 24 #include "mbed_debug.h"
markschwarzer 0:a9d72fcb5d03 25
markschwarzer 0:a9d72fcb5d03 26 #include "FATFileHandle.h"
markschwarzer 0:a9d72fcb5d03 27
markschwarzer 0:a9d72fcb5d03 28 FATFileHandle::FATFileHandle(FIL fh) {
markschwarzer 0:a9d72fcb5d03 29 _fh = fh;
markschwarzer 0:a9d72fcb5d03 30 }
markschwarzer 0:a9d72fcb5d03 31
markschwarzer 0:a9d72fcb5d03 32 int FATFileHandle::close() {
markschwarzer 0:a9d72fcb5d03 33 int retval = f_close(&_fh);
markschwarzer 0:a9d72fcb5d03 34 delete this;
markschwarzer 0:a9d72fcb5d03 35 return retval;
markschwarzer 0:a9d72fcb5d03 36 }
markschwarzer 0:a9d72fcb5d03 37
markschwarzer 0:a9d72fcb5d03 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
markschwarzer 0:a9d72fcb5d03 39 UINT n;
markschwarzer 0:a9d72fcb5d03 40 FRESULT res = f_write(&_fh, buffer, length, &n);
markschwarzer 0:a9d72fcb5d03 41 if (res) {
markschwarzer 0:a9d72fcb5d03 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
markschwarzer 0:a9d72fcb5d03 43 return -1;
markschwarzer 0:a9d72fcb5d03 44 }
markschwarzer 0:a9d72fcb5d03 45 return n;
markschwarzer 0:a9d72fcb5d03 46 }
markschwarzer 0:a9d72fcb5d03 47
markschwarzer 0:a9d72fcb5d03 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
markschwarzer 0:a9d72fcb5d03 49 debug_if(FFS_DBG, "read(%d)\n", length);
markschwarzer 0:a9d72fcb5d03 50 UINT n;
markschwarzer 0:a9d72fcb5d03 51 FRESULT res = f_read(&_fh, buffer, length, &n);
markschwarzer 0:a9d72fcb5d03 52 if (res) {
markschwarzer 0:a9d72fcb5d03 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 54 return -1;
markschwarzer 0:a9d72fcb5d03 55 }
markschwarzer 0:a9d72fcb5d03 56 return n;
markschwarzer 0:a9d72fcb5d03 57 }
markschwarzer 0:a9d72fcb5d03 58
markschwarzer 0:a9d72fcb5d03 59 int FATFileHandle::isatty() {
markschwarzer 0:a9d72fcb5d03 60 return 0;
markschwarzer 0:a9d72fcb5d03 61 }
markschwarzer 0:a9d72fcb5d03 62
markschwarzer 0:a9d72fcb5d03 63 off_t FATFileHandle::lseek(off_t position, int whence) {
markschwarzer 0:a9d72fcb5d03 64 if (whence == SEEK_END) {
markschwarzer 0:a9d72fcb5d03 65 position += _fh.fsize;
markschwarzer 0:a9d72fcb5d03 66 } else if(whence==SEEK_CUR) {
markschwarzer 0:a9d72fcb5d03 67 position += _fh.fptr;
markschwarzer 0:a9d72fcb5d03 68 }
markschwarzer 0:a9d72fcb5d03 69 FRESULT res = f_lseek(&_fh, position);
markschwarzer 0:a9d72fcb5d03 70 if (res) {
markschwarzer 0:a9d72fcb5d03 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 72 return -1;
markschwarzer 0:a9d72fcb5d03 73 } else {
markschwarzer 0:a9d72fcb5d03 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
markschwarzer 0:a9d72fcb5d03 75 return _fh.fptr;
markschwarzer 0:a9d72fcb5d03 76 }
markschwarzer 0:a9d72fcb5d03 77 }
markschwarzer 0:a9d72fcb5d03 78
markschwarzer 0:a9d72fcb5d03 79 int FATFileHandle::fsync() {
markschwarzer 0:a9d72fcb5d03 80 FRESULT res = f_sync(&_fh);
markschwarzer 0:a9d72fcb5d03 81 if (res) {
markschwarzer 0:a9d72fcb5d03 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
markschwarzer 0:a9d72fcb5d03 83 return -1;
markschwarzer 0:a9d72fcb5d03 84 }
markschwarzer 0:a9d72fcb5d03 85 return 0;
markschwarzer 0:a9d72fcb5d03 86 }
markschwarzer 0:a9d72fcb5d03 87
markschwarzer 0:a9d72fcb5d03 88 off_t FATFileHandle::flen() {
markschwarzer 0:a9d72fcb5d03 89 return _fh.fsize;
markschwarzer 0:a9d72fcb5d03 90 }