Emilia Marino / SDFileSystem

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FATFileSystem/FATDirHandle.cpp@0:5f7b02d095c2, 2021-12-18 (annotated)

Committer:
emiliamarino
Date:
Sat Dec 18 20:17:31 2021 +0000
Revision:
0:5f7b02d095c2
Assignment 4

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emiliamarino 0:5f7b02d095c2 1 /* mbed Microcontroller Library
emiliamarino 0:5f7b02d095c2 2 * Copyright (c) 2006-2012 ARM Limited
emiliamarino 0:5f7b02d095c2 3 *
emiliamarino 0:5f7b02d095c2 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
emiliamarino 0:5f7b02d095c2 5 * of this software and associated documentation files (the "Software"), to deal
emiliamarino 0:5f7b02d095c2 6 * in the Software without restriction, including without limitation the rights
emiliamarino 0:5f7b02d095c2 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
emiliamarino 0:5f7b02d095c2 8 * copies of the Software, and to permit persons to whom the Software is
emiliamarino 0:5f7b02d095c2 9 * furnished to do so, subject to the following conditions:
emiliamarino 0:5f7b02d095c2 10 *
emiliamarino 0:5f7b02d095c2 11 * The above copyright notice and this permission notice shall be included in
emiliamarino 0:5f7b02d095c2 12 * all copies or substantial portions of the Software.
emiliamarino 0:5f7b02d095c2 13 *
emiliamarino 0:5f7b02d095c2 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
emiliamarino 0:5f7b02d095c2 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
emiliamarino 0:5f7b02d095c2 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
emiliamarino 0:5f7b02d095c2 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
emiliamarino 0:5f7b02d095c2 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
emiliamarino 0:5f7b02d095c2 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
emiliamarino 0:5f7b02d095c2 20 * SOFTWARE.
emiliamarino 0:5f7b02d095c2 21 */
emiliamarino 0:5f7b02d095c2 22 #include <string.h>
emiliamarino 0:5f7b02d095c2 23 #include "ff.h"
emiliamarino 0:5f7b02d095c2 24 #include "FATDirHandle.h"
emiliamarino 0:5f7b02d095c2 25
emiliamarino 0:5f7b02d095c2 26 using namespace mbed;
emiliamarino 0:5f7b02d095c2 27
emiliamarino 0:5f7b02d095c2 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
emiliamarino 0:5f7b02d095c2 29 dir = the_dir;
emiliamarino 0:5f7b02d095c2 30 }
emiliamarino 0:5f7b02d095c2 31
emiliamarino 0:5f7b02d095c2 32 int FATDirHandle::closedir() {
emiliamarino 0:5f7b02d095c2 33 int retval = f_closedir(&dir);
emiliamarino 0:5f7b02d095c2 34 delete this;
emiliamarino 0:5f7b02d095c2 35 return retval;
emiliamarino 0:5f7b02d095c2 36 }
emiliamarino 0:5f7b02d095c2 37
emiliamarino 0:5f7b02d095c2 38 struct dirent *FATDirHandle::readdir() {
emiliamarino 0:5f7b02d095c2 39 FILINFO finfo;
emiliamarino 0:5f7b02d095c2 40
emiliamarino 0:5f7b02d095c2 41 #if _USE_LFN
emiliamarino 0:5f7b02d095c2 42 finfo.lfname = cur_entry.d_name;
emiliamarino 0:5f7b02d095c2 43 finfo.lfsize = sizeof(cur_entry.d_name);
emiliamarino 0:5f7b02d095c2 44 #endif // _USE_LFN
emiliamarino 0:5f7b02d095c2 45
emiliamarino 0:5f7b02d095c2 46 FRESULT res = f_readdir(&dir, &finfo);
emiliamarino 0:5f7b02d095c2 47
emiliamarino 0:5f7b02d095c2 48 #if _USE_LFN
emiliamarino 0:5f7b02d095c2 49 if(res != 0 || finfo.fname[0]==0) {
emiliamarino 0:5f7b02d095c2 50 return NULL;
emiliamarino 0:5f7b02d095c2 51 } else {
emiliamarino 0:5f7b02d095c2 52 if(cur_entry.d_name[0]==0) {
emiliamarino 0:5f7b02d095c2 53 // No long filename so use short filename.
emiliamarino 0:5f7b02d095c2 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
emiliamarino 0:5f7b02d095c2 55 }
emiliamarino 0:5f7b02d095c2 56 return &cur_entry;
emiliamarino 0:5f7b02d095c2 57 }
emiliamarino 0:5f7b02d095c2 58 #else
emiliamarino 0:5f7b02d095c2 59 if(res != 0 || finfo.fname[0]==0) {
emiliamarino 0:5f7b02d095c2 60 return NULL;
emiliamarino 0:5f7b02d095c2 61 } else {
emiliamarino 0:5f7b02d095c2 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
emiliamarino 0:5f7b02d095c2 63 return &cur_entry;
emiliamarino 0:5f7b02d095c2 64 }
emiliamarino 0:5f7b02d095c2 65 #endif /* _USE_LFN */
emiliamarino 0:5f7b02d095c2 66 }
emiliamarino 0:5f7b02d095c2 67
emiliamarino 0:5f7b02d095c2 68 void FATDirHandle::rewinddir() {
emiliamarino 0:5f7b02d095c2 69 dir.index = 0;
emiliamarino 0:5f7b02d095c2 70 }
emiliamarino 0:5f7b02d095c2 71
emiliamarino 0:5f7b02d095c2 72 off_t FATDirHandle::telldir() {
emiliamarino 0:5f7b02d095c2 73 return dir.index;
emiliamarino 0:5f7b02d095c2 74 }
emiliamarino 0:5f7b02d095c2 75
emiliamarino 0:5f7b02d095c2 76 void FATDirHandle::seekdir(off_t location) {
emiliamarino 0:5f7b02d095c2 77 dir.index = location;
emiliamarino 0:5f7b02d095c2 78 }
emiliamarino 0:5f7b02d095c2 79
emiliamarino 0:5f7b02d095c2 80 ssize_t FATDirHandle::read(struct dirent *ent) {
emiliamarino 0:5f7b02d095c2 81 struct dirent *temp = readdir();
emiliamarino 0:5f7b02d095c2 82 if (!temp) {
emiliamarino 0:5f7b02d095c2 83 return 0;
emiliamarino 0:5f7b02d095c2 84 }
emiliamarino 0:5f7b02d095c2 85
emiliamarino 0:5f7b02d095c2 86 memcpy(ent, temp, sizeof(*ent));
emiliamarino 0:5f7b02d095c2 87 return 1;
emiliamarino 0:5f7b02d095c2 88 }
emiliamarino 0:5f7b02d095c2 89