FATDirHandle.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2006-2012 ARM Limited
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a copy
00005  * of this software and associated documentation files (the "Software"), to deal
00006  * in the Software without restriction, including without limitation the rights
00007  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00008  * copies of the Software, and to permit persons to whom the Software is
00009  * furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included in
00012  * all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00017  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00019  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
00020  * SOFTWARE.
00021  */
00022 #include <string.h>
00023 #include "ff.h"
00024 #include "FATDirHandle.h"
00025 
00026 using namespace mbed;
00027 
00028 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
00029     dir = the_dir;
00030 }
00031 
00032 int FATDirHandle::closedir() {
00033     int retval = f_closedir(&dir);
00034     delete this;
00035     return retval;
00036 }
00037 
00038 struct dirent *FATDirHandle::readdir() {
00039     FILINFO finfo;
00040 
00041 #if _USE_LFN
00042     finfo.lfname = cur_entry.d_name;
00043     finfo.lfsize = sizeof(cur_entry.d_name);
00044 #endif // _USE_LFN
00045 
00046     FRESULT res = f_readdir(&dir, &finfo);
00047 
00048 #if _USE_LFN
00049     if(res != 0 || finfo.fname[0]==0) {
00050         return NULL;
00051     } else {
00052         if(cur_entry.d_name[0]==0) {
00053             // No long filename so use short filename.
00054             memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
00055         }
00056         return &cur_entry;
00057     }
00058 #else
00059     if(res != 0 || finfo.fname[0]==0) {
00060         return NULL;
00061     } else {
00062         memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
00063         return &cur_entry;
00064     }
00065 #endif /* _USE_LFN */
00066 }
00067 
00068 void FATDirHandle::rewinddir() {
00069     dir.index = 0;
00070 }
00071 
00072 off_t FATDirHandle::telldir() {
00073     return dir.index;
00074 }
00075 
00076 void FATDirHandle::seekdir(off_t location) {
00077     dir.index = location;
00078 }
00079