Mark Schwarzer / SDFileSystem_A8

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FATFileSystem/FATDirHandle.cpp@0:a9d72fcb5d03, 2020-11-17 (annotated)

Committer:
markschwarzer
Date:
Tue Nov 17 20:28:59 2020 +0000
Revision:
0:a9d72fcb5d03
logs gps data to SD card

Who changed what in which revision?

UserRevisionLine numberNew contents of line
markschwarzer 0:a9d72fcb5d03 1 /* mbed Microcontroller Library
markschwarzer 0:a9d72fcb5d03 2 * Copyright (c) 2006-2012 ARM Limited
markschwarzer 0:a9d72fcb5d03 3 *
markschwarzer 0:a9d72fcb5d03 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
markschwarzer 0:a9d72fcb5d03 5 * of this software and associated documentation files (the "Software"), to deal
markschwarzer 0:a9d72fcb5d03 6 * in the Software without restriction, including without limitation the rights
markschwarzer 0:a9d72fcb5d03 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
markschwarzer 0:a9d72fcb5d03 8 * copies of the Software, and to permit persons to whom the Software is
markschwarzer 0:a9d72fcb5d03 9 * furnished to do so, subject to the following conditions:
markschwarzer 0:a9d72fcb5d03 10 *
markschwarzer 0:a9d72fcb5d03 11 * The above copyright notice and this permission notice shall be included in
markschwarzer 0:a9d72fcb5d03 12 * all copies or substantial portions of the Software.
markschwarzer 0:a9d72fcb5d03 13 *
markschwarzer 0:a9d72fcb5d03 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
markschwarzer 0:a9d72fcb5d03 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
markschwarzer 0:a9d72fcb5d03 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
markschwarzer 0:a9d72fcb5d03 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
markschwarzer 0:a9d72fcb5d03 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
markschwarzer 0:a9d72fcb5d03 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
markschwarzer 0:a9d72fcb5d03 20 * SOFTWARE.
markschwarzer 0:a9d72fcb5d03 21 */
markschwarzer 0:a9d72fcb5d03 22 #include <string.h>
markschwarzer 0:a9d72fcb5d03 23 #include "ff.h"
markschwarzer 0:a9d72fcb5d03 24 #include "FATDirHandle.h"
markschwarzer 0:a9d72fcb5d03 25
markschwarzer 0:a9d72fcb5d03 26 using namespace mbed;
markschwarzer 0:a9d72fcb5d03 27
markschwarzer 0:a9d72fcb5d03 28 FATDirHandle::FATDirHandle(const FATFS_DIR &the_dir) {
markschwarzer 0:a9d72fcb5d03 29 dir = the_dir;
markschwarzer 0:a9d72fcb5d03 30 }
markschwarzer 0:a9d72fcb5d03 31
markschwarzer 0:a9d72fcb5d03 32 int FATDirHandle::closedir() {
markschwarzer 0:a9d72fcb5d03 33 int retval = f_closedir(&dir);
markschwarzer 0:a9d72fcb5d03 34 delete this;
markschwarzer 0:a9d72fcb5d03 35 return retval;
markschwarzer 0:a9d72fcb5d03 36 }
markschwarzer 0:a9d72fcb5d03 37
markschwarzer 0:a9d72fcb5d03 38 struct dirent *FATDirHandle::readdir() {
markschwarzer 0:a9d72fcb5d03 39 FILINFO finfo;
markschwarzer 0:a9d72fcb5d03 40
markschwarzer 0:a9d72fcb5d03 41 #if _USE_LFN
markschwarzer 0:a9d72fcb5d03 42 finfo.lfname = cur_entry.d_name;
markschwarzer 0:a9d72fcb5d03 43 finfo.lfsize = sizeof(cur_entry.d_name);
markschwarzer 0:a9d72fcb5d03 44 #endif // _USE_LFN
markschwarzer 0:a9d72fcb5d03 45
markschwarzer 0:a9d72fcb5d03 46 FRESULT res = f_readdir(&dir, &finfo);
markschwarzer 0:a9d72fcb5d03 47
markschwarzer 0:a9d72fcb5d03 48 #if _USE_LFN
markschwarzer 0:a9d72fcb5d03 49 if(res != 0 || finfo.fname[0]==0) {
markschwarzer 0:a9d72fcb5d03 50 return NULL;
markschwarzer 0:a9d72fcb5d03 51 } else {
markschwarzer 0:a9d72fcb5d03 52 if(cur_entry.d_name[0]==0) {
markschwarzer 0:a9d72fcb5d03 53 // No long filename so use short filename.
markschwarzer 0:a9d72fcb5d03 54 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
markschwarzer 0:a9d72fcb5d03 55 }
markschwarzer 0:a9d72fcb5d03 56 return &cur_entry;
markschwarzer 0:a9d72fcb5d03 57 }
markschwarzer 0:a9d72fcb5d03 58 #else
markschwarzer 0:a9d72fcb5d03 59 if(res != 0 || finfo.fname[0]==0) {
markschwarzer 0:a9d72fcb5d03 60 return NULL;
markschwarzer 0:a9d72fcb5d03 61 } else {
markschwarzer 0:a9d72fcb5d03 62 memcpy(cur_entry.d_name, finfo.fname, sizeof(finfo.fname));
markschwarzer 0:a9d72fcb5d03 63 return &cur_entry;
markschwarzer 0:a9d72fcb5d03 64 }
markschwarzer 0:a9d72fcb5d03 65 #endif /* _USE_LFN */
markschwarzer 0:a9d72fcb5d03 66 }
markschwarzer 0:a9d72fcb5d03 67
markschwarzer 0:a9d72fcb5d03 68 void FATDirHandle::rewinddir() {
markschwarzer 0:a9d72fcb5d03 69 dir.index = 0;
markschwarzer 0:a9d72fcb5d03 70 }
markschwarzer 0:a9d72fcb5d03 71
markschwarzer 0:a9d72fcb5d03 72 off_t FATDirHandle::telldir() {
markschwarzer 0:a9d72fcb5d03 73 return dir.index;
markschwarzer 0:a9d72fcb5d03 74 }
markschwarzer 0:a9d72fcb5d03 75
markschwarzer 0:a9d72fcb5d03 76 void FATDirHandle::seekdir(off_t location) {
markschwarzer 0:a9d72fcb5d03 77 dir.index = location;
markschwarzer 0:a9d72fcb5d03 78 }
markschwarzer 0:a9d72fcb5d03 79
markschwarzer 0:a9d72fcb5d03 80 ssize_t FATDirHandle::read(struct dirent *ent) {
markschwarzer 0:a9d72fcb5d03 81 struct dirent *temp = readdir();
markschwarzer 0:a9d72fcb5d03 82 if (!temp) {
markschwarzer 0:a9d72fcb5d03 83 return 0;
markschwarzer 0:a9d72fcb5d03 84 }
markschwarzer 0:a9d72fcb5d03 85
markschwarzer 0:a9d72fcb5d03 86 memcpy(ent, temp, sizeof(*ent));
markschwarzer 0:a9d72fcb5d03 87 return 1;
markschwarzer 0:a9d72fcb5d03 88 }
markschwarzer 0:a9d72fcb5d03 89