Kotachi Liu / SDFileSystem

SD card data log

Dependents:   riset_Datalogger

FATFileSystem/FATDirHandle.cpp@0:18d80d7403d3, 2019-11-03 (annotated)

Committer:
kotachi
Date:
Sun Nov 03 07:28:09 2019 +0000
Revision:
0:18d80d7403d3
SD card logging system

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kotachi 0:18d80d7403d3 1 /* mbed Microcontroller Library
kotachi 0:18d80d7403d3 2 * Copyright (c) 2006-2012 ARM Limited
kotachi 0:18d80d7403d3 3 *
kotachi 0:18d80d7403d3 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
kotachi 0:18d80d7403d3 5 * of this software and associated documentation files (the "Software"), to deal
kotachi 0:18d80d7403d3 6 * in the Software without restriction, including without limitation the rights
kotachi 0:18d80d7403d3 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
kotachi 0:18d80d7403d3 8 * copies of the Software, and to permit persons to whom the Software is
kotachi 0:18d80d7403d3 9 * furnished to do so, subject to the following conditions:
kotachi 0:18d80d7403d3 10 *
kotachi 0:18d80d7403d3 11 * The above copyright notice and this permission notice shall be included in
kotachi 0:18d80d7403d3 12 * all copies or substantial portions of the Software.
kotachi 0:18d80d7403d3 13 *
kotachi 0:18d80d7403d3 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
kotachi 0:18d80d7403d3 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
kotachi 0:18d80d7403d3 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
kotachi 0:18d80d7403d3 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
kotachi 0:18d80d7403d3 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
kotachi 0:18d80d7403d3 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
kotachi 0:18d80d7403d3 20 * SOFTWARE.
kotachi 0:18d80d7403d3 21 */
kotachi 0:18d80d7403d3 22 #include <string.h>
kotachi 0:18d80d7403d3 23 #include "ff.h"
kotachi 0:18d80d7403d3 24 #include "FATDirHandle.h"
kotachi 0:18d80d7403d3 25
kotachi 0:18d80d7403d3 26 using namespace mbed;
kotachi 0:18d80d7403d3 27
kotachi 0:18d80d7403d3 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
kotachi 0:18d80d7403d3 29 dir = the_dir;
kotachi 0:18d80d7403d3 30 }
kotachi 0:18d80d7403d3 31
kotachi 0:18d80d7403d3 32 int FATDirHandle::closedir() {
kotachi 0:18d80d7403d3 33 int retval = f_closedir(&dir);
kotachi 0:18d80d7403d3 34 delete this;
kotachi 0:18d80d7403d3 35 return retval;
kotachi 0:18d80d7403d3 36 }
kotachi 0:18d80d7403d3 37
kotachi 0:18d80d7403d3 38 struct dirent *FATDirHandle::readdir() {
kotachi 0:18d80d7403d3 39 FILINFO finfo;
kotachi 0:18d80d7403d3 40
kotachi 0:18d80d7403d3 41 #if _USE_LFN
kotachi 0:18d80d7403d3 42 finfo.lfname = cur_entry.d_name;
kotachi 0:18d80d7403d3 43 finfo.lfsize = sizeof(cur_entry.d_name);
kotachi 0:18d80d7403d3 44 #endif // _USE_LFN
kotachi 0:18d80d7403d3 45
kotachi 0:18d80d7403d3 46 FRESULT res = f_readdir(&dir, &finfo);
kotachi 0:18d80d7403d3 47
kotachi 0:18d80d7403d3 48 #if _USE_LFN
kotachi 0:18d80d7403d3 49 if(res != 0 || finfo.fname[0]==0) {
kotachi 0:18d80d7403d3 50 return NULL;
kotachi 0:18d80d7403d3 51 } else {
kotachi 0:18d80d7403d3 52 if(cur_entry.d_name[0]==0) {
kotachi 0:18d80d7403d3 53 // No long filename so use short filename.
kotachi 0:18d80d7403d3 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
kotachi 0:18d80d7403d3 55 }
kotachi 0:18d80d7403d3 56 return &cur_entry;
kotachi 0:18d80d7403d3 57 }
kotachi 0:18d80d7403d3 58 #else
kotachi 0:18d80d7403d3 59 if(res != 0 || finfo.fname[0]==0) {
kotachi 0:18d80d7403d3 60 return NULL;
kotachi 0:18d80d7403d3 61 } else {
kotachi 0:18d80d7403d3 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
kotachi 0:18d80d7403d3 63 return &cur_entry;
kotachi 0:18d80d7403d3 64 }
kotachi 0:18d80d7403d3 65 #endif /* _USE_LFN */
kotachi 0:18d80d7403d3 66 }
kotachi 0:18d80d7403d3 67
kotachi 0:18d80d7403d3 68 void FATDirHandle::rewinddir() {
kotachi 0:18d80d7403d3 69 dir.index = 0;
kotachi 0:18d80d7403d3 70 }
kotachi 0:18d80d7403d3 71
kotachi 0:18d80d7403d3 72 off_t FATDirHandle::telldir() {
kotachi 0:18d80d7403d3 73 return dir.index;
kotachi 0:18d80d7403d3 74 }
kotachi 0:18d80d7403d3 75
kotachi 0:18d80d7403d3 76 void FATDirHandle::seekdir(off_t location) {
kotachi 0:18d80d7403d3 77 dir.index = location;
kotachi 0:18d80d7403d3 78 }
kotachi 0:18d80d7403d3 79
kotachi 0:18d80d7403d3 80 ssize_t FATDirHandle::read(struct dirent *ent) {
kotachi 0:18d80d7403d3 81 struct dirent *temp = readdir();
kotachi 0:18d80d7403d3 82 if (!temp) {
kotachi 0:18d80d7403d3 83 return 0;
kotachi 0:18d80d7403d3 84 }
kotachi 0:18d80d7403d3 85
kotachi 0:18d80d7403d3 86 memcpy(ent, temp, sizeof(*ent));
kotachi 0:18d80d7403d3 87 return 1;
kotachi 0:18d80d7403d3 88 }
kotachi 0:18d80d7403d3 89