megan gimple / SDFileSystem

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Dependents:   gimple_A4_3_Temp_Light

FATFileSystem/FATDirHandle.cpp@0:07ff9ae5339f, 2021-11-13 (annotated)

Committer:
mgimple
Date:
Sat Nov 13 20:10:05 2021 +0000
Revision:
0:07ff9ae5339f
SD

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mgimple 0:07ff9ae5339f 1 /* mbed Microcontroller Library
mgimple 0:07ff9ae5339f 2 * Copyright (c) 2006-2012 ARM Limited
mgimple 0:07ff9ae5339f 3 *
mgimple 0:07ff9ae5339f 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
mgimple 0:07ff9ae5339f 5 * of this software and associated documentation files (the "Software"), to deal
mgimple 0:07ff9ae5339f 6 * in the Software without restriction, including without limitation the rights
mgimple 0:07ff9ae5339f 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
mgimple 0:07ff9ae5339f 8 * copies of the Software, and to permit persons to whom the Software is
mgimple 0:07ff9ae5339f 9 * furnished to do so, subject to the following conditions:
mgimple 0:07ff9ae5339f 10 *
mgimple 0:07ff9ae5339f 11 * The above copyright notice and this permission notice shall be included in
mgimple 0:07ff9ae5339f 12 * all copies or substantial portions of the Software.
mgimple 0:07ff9ae5339f 13 *
mgimple 0:07ff9ae5339f 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
mgimple 0:07ff9ae5339f 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
mgimple 0:07ff9ae5339f 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
mgimple 0:07ff9ae5339f 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
mgimple 0:07ff9ae5339f 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
mgimple 0:07ff9ae5339f 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
mgimple 0:07ff9ae5339f 20 * SOFTWARE.
mgimple 0:07ff9ae5339f 21 */
mgimple 0:07ff9ae5339f 22 #include <string.h>
mgimple 0:07ff9ae5339f 23 #include "ff.h"
mgimple 0:07ff9ae5339f 24 #include "FATDirHandle.h"
mgimple 0:07ff9ae5339f 25
mgimple 0:07ff9ae5339f 26 using namespace mbed;
mgimple 0:07ff9ae5339f 27
mgimple 0:07ff9ae5339f 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
mgimple 0:07ff9ae5339f 29 dir = the_dir;
mgimple 0:07ff9ae5339f 30 }
mgimple 0:07ff9ae5339f 31
mgimple 0:07ff9ae5339f 32 int FATDirHandle::closedir() {
mgimple 0:07ff9ae5339f 33 int retval = f_closedir(&dir);
mgimple 0:07ff9ae5339f 34 delete this;
mgimple 0:07ff9ae5339f 35 return retval;
mgimple 0:07ff9ae5339f 36 }
mgimple 0:07ff9ae5339f 37
mgimple 0:07ff9ae5339f 38 struct dirent *FATDirHandle::readdir() {
mgimple 0:07ff9ae5339f 39 FILINFO finfo;
mgimple 0:07ff9ae5339f 40
mgimple 0:07ff9ae5339f 41 #if _USE_LFN
mgimple 0:07ff9ae5339f 42 finfo.lfname = cur_entry.d_name;
mgimple 0:07ff9ae5339f 43 finfo.lfsize = sizeof(cur_entry.d_name);
mgimple 0:07ff9ae5339f 44 #endif // _USE_LFN
mgimple 0:07ff9ae5339f 45
mgimple 0:07ff9ae5339f 46 FRESULT res = f_readdir(&dir, &finfo);
mgimple 0:07ff9ae5339f 47
mgimple 0:07ff9ae5339f 48 #if _USE_LFN
mgimple 0:07ff9ae5339f 49 if(res != 0 || finfo.fname[0]==0) {
mgimple 0:07ff9ae5339f 50 return NULL;
mgimple 0:07ff9ae5339f 51 } else {
mgimple 0:07ff9ae5339f 52 if(cur_entry.d_name[0]==0) {
mgimple 0:07ff9ae5339f 53 // No long filename so use short filename.
mgimple 0:07ff9ae5339f 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
mgimple 0:07ff9ae5339f 55 }
mgimple 0:07ff9ae5339f 56 return &cur_entry;
mgimple 0:07ff9ae5339f 57 }
mgimple 0:07ff9ae5339f 58 #else
mgimple 0:07ff9ae5339f 59 if(res != 0 || finfo.fname[0]==0) {
mgimple 0:07ff9ae5339f 60 return NULL;
mgimple 0:07ff9ae5339f 61 } else {
mgimple 0:07ff9ae5339f 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
mgimple 0:07ff9ae5339f 63 return &cur_entry;
mgimple 0:07ff9ae5339f 64 }
mgimple 0:07ff9ae5339f 65 #endif /* _USE_LFN */
mgimple 0:07ff9ae5339f 66 }
mgimple 0:07ff9ae5339f 67
mgimple 0:07ff9ae5339f 68 void FATDirHandle::rewinddir() {
mgimple 0:07ff9ae5339f 69 dir.index = 0;
mgimple 0:07ff9ae5339f 70 }
mgimple 0:07ff9ae5339f 71
mgimple 0:07ff9ae5339f 72 off_t FATDirHandle::telldir() {
mgimple 0:07ff9ae5339f 73 return dir.index;
mgimple 0:07ff9ae5339f 74 }
mgimple 0:07ff9ae5339f 75
mgimple 0:07ff9ae5339f 76 void FATDirHandle::seekdir(off_t location) {
mgimple 0:07ff9ae5339f 77 dir.index = location;
mgimple 0:07ff9ae5339f 78 }
mgimple 0:07ff9ae5339f 79
mgimple 0:07ff9ae5339f 80 ssize_t FATDirHandle::read(struct dirent *ent) {
mgimple 0:07ff9ae5339f 81 struct dirent *temp = readdir();
mgimple 0:07ff9ae5339f 82 if (!temp) {
mgimple 0:07ff9ae5339f 83 return 0;
mgimple 0:07ff9ae5339f 84 }
mgimple 0:07ff9ae5339f 85
mgimple 0:07ff9ae5339f 86 memcpy(ent, temp, sizeof(*ent));
mgimple 0:07ff9ae5339f 87 return 1;
mgimple 0:07ff9ae5339f 88 }
mgimple 0:07ff9ae5339f 89