Kevin Abraham / Mbed 2 deprecated MazeRunner_Fall2017

ECE 2036 Project

Dependencies:   mbed wave_player 4DGL-uLCD-SE

SDFileSystem/FATFileSystem/FATDirHandle.cpp@0:cf4396614a79, 2017-11-03 (annotated)

Committer:
rconnorlawson
Date:
Fri Nov 03 18:48:48 2017 +0000
Revision:
0:cf4396614a79
Emptied shell code (including doubly linked list) and added comments for all the functionality.;

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rconnorlawson 0:cf4396614a79 1 /* mbed Microcontroller Library
rconnorlawson 0:cf4396614a79 2 * Copyright (c) 2006-2012 ARM Limited
rconnorlawson 0:cf4396614a79 3 *
rconnorlawson 0:cf4396614a79 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
rconnorlawson 0:cf4396614a79 5 * of this software and associated documentation files (the "Software"), to deal
rconnorlawson 0:cf4396614a79 6 * in the Software without restriction, including without limitation the rights
rconnorlawson 0:cf4396614a79 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
rconnorlawson 0:cf4396614a79 8 * copies of the Software, and to permit persons to whom the Software is
rconnorlawson 0:cf4396614a79 9 * furnished to do so, subject to the following conditions:
rconnorlawson 0:cf4396614a79 10 *
rconnorlawson 0:cf4396614a79 11 * The above copyright notice and this permission notice shall be included in
rconnorlawson 0:cf4396614a79 12 * all copies or substantial portions of the Software.
rconnorlawson 0:cf4396614a79 13 *
rconnorlawson 0:cf4396614a79 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
rconnorlawson 0:cf4396614a79 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
rconnorlawson 0:cf4396614a79 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
rconnorlawson 0:cf4396614a79 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
rconnorlawson 0:cf4396614a79 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
rconnorlawson 0:cf4396614a79 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
rconnorlawson 0:cf4396614a79 20 * SOFTWARE.
rconnorlawson 0:cf4396614a79 21 */
rconnorlawson 0:cf4396614a79 22 #include <string.h>
rconnorlawson 0:cf4396614a79 23 #include "ff.h"
rconnorlawson 0:cf4396614a79 24 #include "FATDirHandle.h"
rconnorlawson 0:cf4396614a79 25
rconnorlawson 0:cf4396614a79 26 using namespace mbed;
rconnorlawson 0:cf4396614a79 27
rconnorlawson 0:cf4396614a79 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
rconnorlawson 0:cf4396614a79 29 dir = the_dir;
rconnorlawson 0:cf4396614a79 30 }
rconnorlawson 0:cf4396614a79 31
rconnorlawson 0:cf4396614a79 32 int FATDirHandle::closedir() {
rconnorlawson 0:cf4396614a79 33 delete this;
rconnorlawson 0:cf4396614a79 34 return 0;
rconnorlawson 0:cf4396614a79 35 }
rconnorlawson 0:cf4396614a79 36
rconnorlawson 0:cf4396614a79 37 struct dirent *FATDirHandle::readdir() {
rconnorlawson 0:cf4396614a79 38 FILINFO finfo;
rconnorlawson 0:cf4396614a79 39
rconnorlawson 0:cf4396614a79 40 #if _USE_LFN
rconnorlawson 0:cf4396614a79 41 finfo.lfname = cur_entry.d_name;
rconnorlawson 0:cf4396614a79 42 finfo.lfsize = sizeof(cur_entry.d_name);
rconnorlawson 0:cf4396614a79 43 #endif // _USE_LFN
rconnorlawson 0:cf4396614a79 44
rconnorlawson 0:cf4396614a79 45 FRESULT res = f_readdir(&dir, &finfo);
rconnorlawson 0:cf4396614a79 46
rconnorlawson 0:cf4396614a79 47 #if _USE_LFN
rconnorlawson 0:cf4396614a79 48 if(res != 0 || finfo.fname[0]==0) {
rconnorlawson 0:cf4396614a79 49 return NULL;
rconnorlawson 0:cf4396614a79 50 } else {
rconnorlawson 0:cf4396614a79 51 if(cur_entry.d_name[0]==0) {
rconnorlawson 0:cf4396614a79 52 // No long filename so use short filename.
rconnorlawson 0:cf4396614a79 53 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
rconnorlawson 0:cf4396614a79 54 }
rconnorlawson 0:cf4396614a79 55 return &cur_entry;
rconnorlawson 0:cf4396614a79 56 }
rconnorlawson 0:cf4396614a79 57 #else
rconnorlawson 0:cf4396614a79 58 if(res != 0 || finfo.fname[0]==0) {
rconnorlawson 0:cf4396614a79 59 return NULL;
rconnorlawson 0:cf4396614a79 60 } else {
rconnorlawson 0:cf4396614a79 61 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
rconnorlawson 0:cf4396614a79 62 return &cur_entry;
rconnorlawson 0:cf4396614a79 63 }
rconnorlawson 0:cf4396614a79 64 #endif /* _USE_LFN */
rconnorlawson 0:cf4396614a79 65 }
rconnorlawson 0:cf4396614a79 66
rconnorlawson 0:cf4396614a79 67 void FATDirHandle::rewinddir() {
rconnorlawson 0:cf4396614a79 68 dir.index = 0;
rconnorlawson 0:cf4396614a79 69 }
rconnorlawson 0:cf4396614a79 70
rconnorlawson 0:cf4396614a79 71 off_t FATDirHandle::telldir() {
rconnorlawson 0:cf4396614a79 72 return dir.index;
rconnorlawson 0:cf4396614a79 73 }
rconnorlawson 0:cf4396614a79 74
rconnorlawson 0:cf4396614a79 75 void FATDirHandle::seekdir(off_t location) {
rconnorlawson 0:cf4396614a79 76 dir.index = location;
rconnorlawson 0:cf4396614a79 77 }
rconnorlawson 0:cf4396614a79 78