Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

features/unsupported/fs/fat/FATDirHandle.cpp@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2012 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
elessair 0:f269e3021894 5 * of this software and associated documentation files (the "Software"), to deal
elessair 0:f269e3021894 6 * in the Software without restriction, including without limitation the rights
elessair 0:f269e3021894 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
elessair 0:f269e3021894 8 * copies of the Software, and to permit persons to whom the Software is
elessair 0:f269e3021894 9 * furnished to do so, subject to the following conditions:
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * The above copyright notice and this permission notice shall be included in
elessair 0:f269e3021894 12 * all copies or substantial portions of the Software.
elessair 0:f269e3021894 13 *
elessair 0:f269e3021894 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
elessair 0:f269e3021894 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
elessair 0:f269e3021894 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
elessair 0:f269e3021894 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
elessair 0:f269e3021894 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
elessair 0:f269e3021894 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
elessair 0:f269e3021894 20 * SOFTWARE.
elessair 0:f269e3021894 21 */
elessair 0:f269e3021894 22 #include <string.h>
elessair 0:f269e3021894 23 #include "ff.h"
elessair 0:f269e3021894 24 #include "FATDirHandle.h"
elessair 0:f269e3021894 25
elessair 0:f269e3021894 26 using namespace mbed;
elessair 0:f269e3021894 27
elessair 0:f269e3021894 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir, PlatformMutex * mutex): _mutex(mutex) {
elessair 0:f269e3021894 29 dir = the_dir;
elessair 0:f269e3021894 30 }
elessair 0:f269e3021894 31
elessair 0:f269e3021894 32 int FATDirHandle::closedir() {
elessair 0:f269e3021894 33 lock();
elessair 0:f269e3021894 34 int retval = f_closedir(&dir);
elessair 0:f269e3021894 35 unlock();
elessair 0:f269e3021894 36 delete this;
elessair 0:f269e3021894 37 return retval;
elessair 0:f269e3021894 38 }
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 struct dirent *FATDirHandle::readdir() {
elessair 0:f269e3021894 41 FILINFO finfo;
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 lock();
elessair 0:f269e3021894 44 #if _USE_LFN
elessair 0:f269e3021894 45 finfo.lfname = cur_entry.d_name;
elessair 0:f269e3021894 46 finfo.lfsize = sizeof(cur_entry.d_name);
elessair 0:f269e3021894 47 #endif // _USE_LFN
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49 FRESULT res = f_readdir(&dir, &finfo);
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 #if _USE_LFN
elessair 0:f269e3021894 52 if(res != 0 || finfo.fname[0]==0) {
elessair 0:f269e3021894 53 unlock();
elessair 0:f269e3021894 54 return NULL;
elessair 0:f269e3021894 55 } else {
elessair 0:f269e3021894 56 if(cur_entry.d_name[0]==0) {
elessair 0:f269e3021894 57 // No long filename so use short filename.
elessair 0:f269e3021894 58 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
elessair 0:f269e3021894 59 }
elessair 0:f269e3021894 60 unlock();
elessair 0:f269e3021894 61 return &cur_entry;
elessair 0:f269e3021894 62 }
elessair 0:f269e3021894 63 #else
elessair 0:f269e3021894 64 if(res != 0 || finfo.fname[0]==0) {
elessair 0:f269e3021894 65 unlock();
elessair 0:f269e3021894 66 return NULL;
elessair 0:f269e3021894 67 } else {
elessair 0:f269e3021894 68 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
elessair 0:f269e3021894 69 unlock();
elessair 0:f269e3021894 70 return &cur_entry;
elessair 0:f269e3021894 71 }
elessair 0:f269e3021894 72 #endif /* _USE_LFN */
elessair 0:f269e3021894 73 }
elessair 0:f269e3021894 74
elessair 0:f269e3021894 75 void FATDirHandle::rewinddir() {
elessair 0:f269e3021894 76 lock();
elessair 0:f269e3021894 77 dir.index = 0;
elessair 0:f269e3021894 78 unlock();
elessair 0:f269e3021894 79 }
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 off_t FATDirHandle::telldir() {
elessair 0:f269e3021894 82 lock();
elessair 0:f269e3021894 83 off_t offset = dir.index;
elessair 0:f269e3021894 84 unlock();
elessair 0:f269e3021894 85 return offset;
elessair 0:f269e3021894 86 }
elessair 0:f269e3021894 87
elessair 0:f269e3021894 88 void FATDirHandle::seekdir(off_t location) {
elessair 0:f269e3021894 89 lock();
elessair 0:f269e3021894 90 dir.index = location;
elessair 0:f269e3021894 91 unlock();
elessair 0:f269e3021894 92 }
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 void FATDirHandle::lock() {
elessair 0:f269e3021894 95 _mutex->lock();
elessair 0:f269e3021894 96 }
elessair 0:f269e3021894 97
elessair 0:f269e3021894 98 void FATDirHandle::unlock() {
elessair 0:f269e3021894 99 _mutex->unlock();
elessair 0:f269e3021894 100 }
elessair 0:f269e3021894 101