tmk_core/tool/mbed/mbed-sdk/libraries/fs/fat/FATDirHandle.cpp

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