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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, PlatformMutex * mutex): _mutex(mutex) { 00029 dir = the_dir; 00030 } 00031 00032 int FATDirHandle::closedir() { 00033 lock(); 00034 int retval = f_closedir(&dir); 00035 unlock(); 00036 delete this; 00037 return retval; 00038 } 00039 00040 struct dirent *FATDirHandle::readdir() { 00041 FILINFO finfo; 00042 00043 lock(); 00044 #if _USE_LFN 00045 finfo.lfname = cur_entry.d_name; 00046 finfo.lfsize = sizeof(cur_entry.d_name); 00047 #endif // _USE_LFN 00048 00049 FRESULT res = f_readdir(&dir, &finfo); 00050 00051 #if _USE_LFN 00052 if(res != 0 || finfo.fname[0]==0) { 00053 unlock(); 00054 return NULL; 00055 } else { 00056 if(cur_entry.d_name[0]==0) { 00057 // No long filename so use short filename. 00058 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname)); 00059 } 00060 unlock(); 00061 return &cur_entry; 00062 } 00063 #else 00064 if(res != 0 || finfo.fname[0]==0) { 00065 unlock(); 00066 return NULL; 00067 } else { 00068 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname)); 00069 unlock(); 00070 return &cur_entry; 00071 } 00072 #endif /* _USE_LFN */ 00073 } 00074 00075 void FATDirHandle::rewinddir() { 00076 lock(); 00077 dir.index = 0; 00078 unlock(); 00079 } 00080 00081 off_t FATDirHandle::telldir() { 00082 lock(); 00083 off_t offset = dir.index; 00084 unlock(); 00085 return offset; 00086 } 00087 00088 void FATDirHandle::seekdir(off_t location) { 00089 lock(); 00090 dir.index = location; 00091 unlock(); 00092 } 00093 00094 void FATDirHandle::lock() { 00095 _mutex->lock(); 00096 } 00097 00098 void FATDirHandle::unlock() { 00099 _mutex->unlock(); 00100 } 00101
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