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features/filesystem/Dir.cpp@167:2ee3e82cb6f5, 2017-07-21 (annotated)

Committer:
thedo
Date:
Fri Jul 21 01:26:54 2017 +0000
Revision:
167:2ee3e82cb6f5
Parent:
166:240bc5a0f42a 
gr-peach-opencv-project-sd-card

Who changed what in which revision?

UserRevisionLine numberNew contents of line
thedo 166:240bc5a0f42a 1 /* mbed Microcontroller Library
thedo 166:240bc5a0f42a 2 * Copyright (c) 2015 ARM Limited
thedo 166:240bc5a0f42a 3 *
thedo 166:240bc5a0f42a 4 * Licensed under the Apache License, Version 2.0 (the "License");
thedo 166:240bc5a0f42a 5 * you may not use this file except in compliance with the License.
thedo 166:240bc5a0f42a 6 * You may obtain a copy of the License at
thedo 166:240bc5a0f42a 7 *
thedo 166:240bc5a0f42a 8 * http://www.apache.org/licenses/LICENSE-2.0
thedo 166:240bc5a0f42a 9 *
thedo 166:240bc5a0f42a 10 * Unless required by applicable law or agreed to in writing, software
thedo 166:240bc5a0f42a 11 * distributed under the License is distributed on an "AS IS" BASIS,
thedo 166:240bc5a0f42a 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
thedo 166:240bc5a0f42a 13 * See the License for the specific language governing permissions and
thedo 166:240bc5a0f42a 14 * limitations under the License.
thedo 166:240bc5a0f42a 15 */
thedo 166:240bc5a0f42a 16
thedo 166:240bc5a0f42a 17 #include "Dir.h"
thedo 166:240bc5a0f42a 18 #include "mbed.h"
thedo 166:240bc5a0f42a 19 #include <errno.h>
thedo 166:240bc5a0f42a 20
thedo 166:240bc5a0f42a 21
thedo 166:240bc5a0f42a 22 Dir::Dir()
thedo 166:240bc5a0f42a 23 : _fs(0), _dir(0)
thedo 166:240bc5a0f42a 24 {
thedo 166:240bc5a0f42a 25 }
thedo 166:240bc5a0f42a 26
thedo 166:240bc5a0f42a 27 Dir::Dir(FileSystem *fs, const char *path)
thedo 166:240bc5a0f42a 28 : _fs(0), _dir(0)
thedo 166:240bc5a0f42a 29 {
thedo 166:240bc5a0f42a 30 open(fs, path);
thedo 166:240bc5a0f42a 31 }
thedo 166:240bc5a0f42a 32
thedo 166:240bc5a0f42a 33 Dir::~Dir()
thedo 166:240bc5a0f42a 34 {
thedo 166:240bc5a0f42a 35 if (_fs) {
thedo 166:240bc5a0f42a 36 close();
thedo 166:240bc5a0f42a 37 }
thedo 166:240bc5a0f42a 38 }
thedo 166:240bc5a0f42a 39
thedo 166:240bc5a0f42a 40 int Dir::open(FileSystem *fs, const char *path)
thedo 166:240bc5a0f42a 41 {
thedo 166:240bc5a0f42a 42 if (_fs) {
thedo 166:240bc5a0f42a 43 return -EINVAL;
thedo 166:240bc5a0f42a 44 }
thedo 166:240bc5a0f42a 45
thedo 166:240bc5a0f42a 46 _fs = fs;
thedo 166:240bc5a0f42a 47 return _fs->dir_open(&_dir, path);
thedo 166:240bc5a0f42a 48 }
thedo 166:240bc5a0f42a 49
thedo 166:240bc5a0f42a 50 int Dir::close()
thedo 166:240bc5a0f42a 51 {
thedo 166:240bc5a0f42a 52 if (!_fs) {
thedo 166:240bc5a0f42a 53 return -EINVAL;
thedo 166:240bc5a0f42a 54 }
thedo 166:240bc5a0f42a 55
thedo 166:240bc5a0f42a 56 int err = _fs->dir_close(_dir);
thedo 166:240bc5a0f42a 57 _fs = 0;
thedo 166:240bc5a0f42a 58 return err;
thedo 166:240bc5a0f42a 59 }
thedo 166:240bc5a0f42a 60
thedo 166:240bc5a0f42a 61 ssize_t Dir::read(struct dirent *ent)
thedo 166:240bc5a0f42a 62 {
thedo 166:240bc5a0f42a 63 MBED_ASSERT(_fs);
thedo 166:240bc5a0f42a 64 memset(ent, 0, sizeof(struct dirent));
thedo 166:240bc5a0f42a 65 return _fs->dir_read(_dir, ent);
thedo 166:240bc5a0f42a 66 }
thedo 166:240bc5a0f42a 67
thedo 166:240bc5a0f42a 68 void Dir::seek(off_t offset)
thedo 166:240bc5a0f42a 69 {
thedo 166:240bc5a0f42a 70 MBED_ASSERT(_fs);
thedo 166:240bc5a0f42a 71 return _fs->dir_seek(_dir, offset);
thedo 166:240bc5a0f42a 72 }
thedo 166:240bc5a0f42a 73
thedo 166:240bc5a0f42a 74 off_t Dir::tell()
thedo 166:240bc5a0f42a 75 {
thedo 166:240bc5a0f42a 76 MBED_ASSERT(_fs);
thedo 166:240bc5a0f42a 77 return _fs->dir_tell(_dir);
thedo 166:240bc5a0f42a 78 }
thedo 166:240bc5a0f42a 79
thedo 166:240bc5a0f42a 80 void Dir::rewind()
thedo 166:240bc5a0f42a 81 {
thedo 166:240bc5a0f42a 82 MBED_ASSERT(_fs);
thedo 166:240bc5a0f42a 83 return _fs->dir_rewind(_dir);
thedo 166:240bc5a0f42a 84 }
thedo 166:240bc5a0f42a 85
thedo 166:240bc5a0f42a 86 size_t Dir::size()
thedo 166:240bc5a0f42a 87 {
thedo 166:240bc5a0f42a 88 MBED_ASSERT(_fs);
thedo 166:240bc5a0f42a 89 return _fs->dir_size(_dir);
thedo 166:240bc5a0f42a 90 }
thedo 166:240bc5a0f42a 91