Alek Boving / SDFileSystem8

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FATFileSystem/FATDirHandle.cpp@0:83e8ad3d9a65, 2020-11-12 (annotated)

Committer:
alekboving
Date:
Thu Nov 12 15:20:15 2020 +0000
Revision:
0:83e8ad3d9a65
initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
alekboving 0:83e8ad3d9a65 1 /* mbed Microcontroller Library
alekboving 0:83e8ad3d9a65 2 * Copyright (c) 2006-2012 ARM Limited
alekboving 0:83e8ad3d9a65 3 *
alekboving 0:83e8ad3d9a65 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
alekboving 0:83e8ad3d9a65 5 * of this software and associated documentation files (the "Software"), to deal
alekboving 0:83e8ad3d9a65 6 * in the Software without restriction, including without limitation the rights
alekboving 0:83e8ad3d9a65 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
alekboving 0:83e8ad3d9a65 8 * copies of the Software, and to permit persons to whom the Software is
alekboving 0:83e8ad3d9a65 9 * furnished to do so, subject to the following conditions:
alekboving 0:83e8ad3d9a65 10 *
alekboving 0:83e8ad3d9a65 11 * The above copyright notice and this permission notice shall be included in
alekboving 0:83e8ad3d9a65 12 * all copies or substantial portions of the Software.
alekboving 0:83e8ad3d9a65 13 *
alekboving 0:83e8ad3d9a65 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
alekboving 0:83e8ad3d9a65 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
alekboving 0:83e8ad3d9a65 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
alekboving 0:83e8ad3d9a65 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
alekboving 0:83e8ad3d9a65 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
alekboving 0:83e8ad3d9a65 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
alekboving 0:83e8ad3d9a65 20 * SOFTWARE.
alekboving 0:83e8ad3d9a65 21 */
alekboving 0:83e8ad3d9a65 22 #include <string.h>
alekboving 0:83e8ad3d9a65 23 #include "ff.h"
alekboving 0:83e8ad3d9a65 24 #include "FATDirHandle.h"
alekboving 0:83e8ad3d9a65 25
alekboving 0:83e8ad3d9a65 26 using namespace mbed;
alekboving 0:83e8ad3d9a65 27
alekboving 0:83e8ad3d9a65 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
alekboving 0:83e8ad3d9a65 29 dir = the_dir;
alekboving 0:83e8ad3d9a65 30 }
alekboving 0:83e8ad3d9a65 31
alekboving 0:83e8ad3d9a65 32 int FATDirHandle::closedir() {
alekboving 0:83e8ad3d9a65 33 int retval = f_closedir(&dir);
alekboving 0:83e8ad3d9a65 34 delete this;
alekboving 0:83e8ad3d9a65 35 return retval;
alekboving 0:83e8ad3d9a65 36 }
alekboving 0:83e8ad3d9a65 37
alekboving 0:83e8ad3d9a65 38 struct dirent *FATDirHandle::readdir() {
alekboving 0:83e8ad3d9a65 39 FILINFO finfo;
alekboving 0:83e8ad3d9a65 40
alekboving 0:83e8ad3d9a65 41 #if _USE_LFN
alekboving 0:83e8ad3d9a65 42 finfo.lfname = cur_entry.d_name;
alekboving 0:83e8ad3d9a65 43 finfo.lfsize = sizeof(cur_entry.d_name);
alekboving 0:83e8ad3d9a65 44 #endif // _USE_LFN
alekboving 0:83e8ad3d9a65 45
alekboving 0:83e8ad3d9a65 46 FRESULT res = f_readdir(&dir, &finfo);
alekboving 0:83e8ad3d9a65 47
alekboving 0:83e8ad3d9a65 48 #if _USE_LFN
alekboving 0:83e8ad3d9a65 49 if(res != 0 || finfo.fname[0]==0) {
alekboving 0:83e8ad3d9a65 50 return NULL;
alekboving 0:83e8ad3d9a65 51 } else {
alekboving 0:83e8ad3d9a65 52 if(cur_entry.d_name[0]==0) {
alekboving 0:83e8ad3d9a65 53 // No long filename so use short filename.
alekboving 0:83e8ad3d9a65 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
alekboving 0:83e8ad3d9a65 55 }
alekboving 0:83e8ad3d9a65 56 return &cur_entry;
alekboving 0:83e8ad3d9a65 57 }
alekboving 0:83e8ad3d9a65 58 #else
alekboving 0:83e8ad3d9a65 59 if(res != 0 || finfo.fname[0]==0) {
alekboving 0:83e8ad3d9a65 60 return NULL;
alekboving 0:83e8ad3d9a65 61 } else {
alekboving 0:83e8ad3d9a65 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
alekboving 0:83e8ad3d9a65 63 return &cur_entry;
alekboving 0:83e8ad3d9a65 64 }
alekboving 0:83e8ad3d9a65 65 #endif /* _USE_LFN */
alekboving 0:83e8ad3d9a65 66 }
alekboving 0:83e8ad3d9a65 67
alekboving 0:83e8ad3d9a65 68 void FATDirHandle::rewinddir() {
alekboving 0:83e8ad3d9a65 69 dir.index = 0;
alekboving 0:83e8ad3d9a65 70 }
alekboving 0:83e8ad3d9a65 71
alekboving 0:83e8ad3d9a65 72 off_t FATDirHandle::telldir() {
alekboving 0:83e8ad3d9a65 73 return dir.index;
alekboving 0:83e8ad3d9a65 74 }
alekboving 0:83e8ad3d9a65 75
alekboving 0:83e8ad3d9a65 76 void FATDirHandle::seekdir(off_t location) {
alekboving 0:83e8ad3d9a65 77 dir.index = location;
alekboving 0:83e8ad3d9a65 78 }
alekboving 0:83e8ad3d9a65 79
alekboving 0:83e8ad3d9a65 80 ssize_t FATDirHandle::read(struct dirent *ent) {
alekboving 0:83e8ad3d9a65 81 struct dirent *temp = readdir();
alekboving 0:83e8ad3d9a65 82 if (!temp) {
alekboving 0:83e8ad3d9a65 83 return 0;
alekboving 0:83e8ad3d9a65 84 }
alekboving 0:83e8ad3d9a65 85
alekboving 0:83e8ad3d9a65 86 memcpy(ent, temp, sizeof(*ent));
alekboving 0:83e8ad3d9a65 87 return 1;
alekboving 0:83e8ad3d9a65 88 }
alekboving 0:83e8ad3d9a65 89