Jordan Beason / FATDirHandle1

Final

FATDirHandle.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 <string.h>
jbeason3 0:e126ae11d20b 23 #include "ff.h"
jbeason3 0:e126ae11d20b 24 #include "FATDirHandle.h"
jbeason3 0:e126ae11d20b 25
jbeason3 0:e126ae11d20b 26 using namespace mbed;
jbeason3 0:e126ae11d20b 27
jbeason3 0:e126ae11d20b 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
jbeason3 0:e126ae11d20b 29 dir = the_dir;
jbeason3 0:e126ae11d20b 30 }
jbeason3 0:e126ae11d20b 31
jbeason3 0:e126ae11d20b 32 int FATDirHandle::closedir() {
jbeason3 0:e126ae11d20b 33 int retval = f_closedir(&dir);
jbeason3 0:e126ae11d20b 34 delete this;
jbeason3 0:e126ae11d20b 35 return retval;
jbeason3 0:e126ae11d20b 36 }
jbeason3 0:e126ae11d20b 37
jbeason3 0:e126ae11d20b 38 struct dirent *FATDirHandle::readdir() {
jbeason3 0:e126ae11d20b 39 FILINFO finfo;
jbeason3 0:e126ae11d20b 40
jbeason3 0:e126ae11d20b 41 #if _USE_LFN
jbeason3 0:e126ae11d20b 42 finfo.lfname = cur_entry.d_name;
jbeason3 0:e126ae11d20b 43 finfo.lfsize = sizeof(cur_entry.d_name);
jbeason3 0:e126ae11d20b 44 #endif // _USE_LFN
jbeason3 0:e126ae11d20b 45
jbeason3 0:e126ae11d20b 46 FRESULT res = f_readdir(&dir, &finfo);
jbeason3 0:e126ae11d20b 47
jbeason3 0:e126ae11d20b 48 #if _USE_LFN
jbeason3 0:e126ae11d20b 49 if(res != 0 || finfo.fname[0]==0) {
jbeason3 0:e126ae11d20b 50 return NULL;
jbeason3 0:e126ae11d20b 51 } else {
jbeason3 0:e126ae11d20b 52 if(cur_entry.d_name[0]==0) {
jbeason3 0:e126ae11d20b 53 // No long filename so use short filename.
jbeason3 0:e126ae11d20b 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
jbeason3 0:e126ae11d20b 55 }
jbeason3 0:e126ae11d20b 56 return &cur_entry;
jbeason3 0:e126ae11d20b 57 }
jbeason3 0:e126ae11d20b 58 #else
jbeason3 0:e126ae11d20b 59 if(res != 0 || finfo.fname[0]==0) {
jbeason3 0:e126ae11d20b 60 return NULL;
jbeason3 0:e126ae11d20b 61 } else {
jbeason3 0:e126ae11d20b 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
jbeason3 0:e126ae11d20b 63 return &cur_entry;
jbeason3 0:e126ae11d20b 64 }
jbeason3 0:e126ae11d20b 65 #endif /* _USE_LFN */
jbeason3 0:e126ae11d20b 66 }
jbeason3 0:e126ae11d20b 67
jbeason3 0:e126ae11d20b 68 void FATDirHandle::rewinddir() {
jbeason3 0:e126ae11d20b 69 dir.index = 0;
jbeason3 0:e126ae11d20b 70 }
jbeason3 0:e126ae11d20b 71
jbeason3 0:e126ae11d20b 72 off_t FATDirHandle::telldir() {
jbeason3 0:e126ae11d20b 73 return dir.index;
jbeason3 0:e126ae11d20b 74 }
jbeason3 0:e126ae11d20b 75
jbeason3 0:e126ae11d20b 76 void FATDirHandle::seekdir(off_t location) {
jbeason3 0:e126ae11d20b 77 dir.index = location;
jbeason3 0:e126ae11d20b 78 }
jbeason3 0:e126ae11d20b 79
jbeason3 0:e126ae11d20b 80 ssize_t FATDirHandle::read(struct dirent *ent) {
jbeason3 0:e126ae11d20b 81 struct dirent *temp = readdir();
jbeason3 0:e126ae11d20b 82 if (!temp) {
jbeason3 0:e126ae11d20b 83 return 0;
jbeason3 0:e126ae11d20b 84 }
jbeason3 0:e126ae11d20b 85
jbeason3 0:e126ae11d20b 86 memcpy(ent, temp, sizeof(*ent));
jbeason3 0:e126ae11d20b 87 return 1;
jbeason3 0:e126ae11d20b 88 }
jbeason3 0:e126ae11d20b 89