EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

features/filesystem/Dir.cpp@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 * Copyright (c) 2015 ARM Limited
be_bryan 0:b74591d5ab33 3 *
be_bryan 0:b74591d5ab33 4 * Licensed under the Apache License, Version 2.0 (the "License");
be_bryan 0:b74591d5ab33 5 * you may not use this file except in compliance with the License.
be_bryan 0:b74591d5ab33 6 * You may obtain a copy of the License at
be_bryan 0:b74591d5ab33 7 *
be_bryan 0:b74591d5ab33 8 * http://www.apache.org/licenses/LICENSE-2.0
be_bryan 0:b74591d5ab33 9 *
be_bryan 0:b74591d5ab33 10 * Unless required by applicable law or agreed to in writing, software
be_bryan 0:b74591d5ab33 11 * distributed under the License is distributed on an "AS IS" BASIS,
be_bryan 0:b74591d5ab33 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
be_bryan 0:b74591d5ab33 13 * See the License for the specific language governing permissions and
be_bryan 0:b74591d5ab33 14 * limitations under the License.
be_bryan 0:b74591d5ab33 15 */
be_bryan 0:b74591d5ab33 16
be_bryan 0:b74591d5ab33 17 #include "Dir.h"
be_bryan 0:b74591d5ab33 18 #include "mbed.h"
be_bryan 0:b74591d5ab33 19 #include <errno.h>
be_bryan 0:b74591d5ab33 20
be_bryan 0:b74591d5ab33 21
be_bryan 0:b74591d5ab33 22 Dir::Dir()
be_bryan 0:b74591d5ab33 23 : _fs(0), _dir(0)
be_bryan 0:b74591d5ab33 24 {
be_bryan 0:b74591d5ab33 25 }
be_bryan 0:b74591d5ab33 26
be_bryan 0:b74591d5ab33 27 Dir::Dir(FileSystem *fs, const char *path)
be_bryan 0:b74591d5ab33 28 : _fs(0), _dir(0)
be_bryan 0:b74591d5ab33 29 {
be_bryan 0:b74591d5ab33 30 open(fs, path);
be_bryan 0:b74591d5ab33 31 }
be_bryan 0:b74591d5ab33 32
be_bryan 0:b74591d5ab33 33 Dir::~Dir()
be_bryan 0:b74591d5ab33 34 {
be_bryan 0:b74591d5ab33 35 if (_fs) {
be_bryan 0:b74591d5ab33 36 close();
be_bryan 0:b74591d5ab33 37 }
be_bryan 0:b74591d5ab33 38 }
be_bryan 0:b74591d5ab33 39
be_bryan 0:b74591d5ab33 40 int Dir::open(FileSystem *fs, const char *path)
be_bryan 0:b74591d5ab33 41 {
be_bryan 0:b74591d5ab33 42 if (_fs) {
be_bryan 0:b74591d5ab33 43 return -EINVAL;
be_bryan 0:b74591d5ab33 44 }
be_bryan 0:b74591d5ab33 45
be_bryan 0:b74591d5ab33 46 int err = fs->dir_open(&_dir, path);
be_bryan 0:b74591d5ab33 47 if (!err) {
be_bryan 0:b74591d5ab33 48 _fs = fs;
be_bryan 0:b74591d5ab33 49 }
be_bryan 0:b74591d5ab33 50
be_bryan 0:b74591d5ab33 51 return err;
be_bryan 0:b74591d5ab33 52 }
be_bryan 0:b74591d5ab33 53
be_bryan 0:b74591d5ab33 54 int Dir::close()
be_bryan 0:b74591d5ab33 55 {
be_bryan 0:b74591d5ab33 56 if (!_fs) {
be_bryan 0:b74591d5ab33 57 return -EINVAL;
be_bryan 0:b74591d5ab33 58 }
be_bryan 0:b74591d5ab33 59
be_bryan 0:b74591d5ab33 60 int err = _fs->dir_close(_dir);
be_bryan 0:b74591d5ab33 61 _fs = 0;
be_bryan 0:b74591d5ab33 62 return err;
be_bryan 0:b74591d5ab33 63 }
be_bryan 0:b74591d5ab33 64
be_bryan 0:b74591d5ab33 65 ssize_t Dir::read(struct dirent *ent)
be_bryan 0:b74591d5ab33 66 {
be_bryan 0:b74591d5ab33 67 MBED_ASSERT(_fs);
be_bryan 0:b74591d5ab33 68 memset(ent, 0, sizeof(struct dirent));
be_bryan 0:b74591d5ab33 69 return _fs->dir_read(_dir, ent);
be_bryan 0:b74591d5ab33 70 }
be_bryan 0:b74591d5ab33 71
be_bryan 0:b74591d5ab33 72 void Dir::seek(off_t offset)
be_bryan 0:b74591d5ab33 73 {
be_bryan 0:b74591d5ab33 74 MBED_ASSERT(_fs);
be_bryan 0:b74591d5ab33 75 return _fs->dir_seek(_dir, offset);
be_bryan 0:b74591d5ab33 76 }
be_bryan 0:b74591d5ab33 77
be_bryan 0:b74591d5ab33 78 off_t Dir::tell()
be_bryan 0:b74591d5ab33 79 {
be_bryan 0:b74591d5ab33 80 MBED_ASSERT(_fs);
be_bryan 0:b74591d5ab33 81 return _fs->dir_tell(_dir);
be_bryan 0:b74591d5ab33 82 }
be_bryan 0:b74591d5ab33 83
be_bryan 0:b74591d5ab33 84 void Dir::rewind()
be_bryan 0:b74591d5ab33 85 {
be_bryan 0:b74591d5ab33 86 MBED_ASSERT(_fs);
be_bryan 0:b74591d5ab33 87 return _fs->dir_rewind(_dir);
be_bryan 0:b74591d5ab33 88 }
be_bryan 0:b74591d5ab33 89
be_bryan 0:b74591d5ab33 90 size_t Dir::size()
be_bryan 0:b74591d5ab33 91 {
be_bryan 0:b74591d5ab33 92 MBED_ASSERT(_fs);
be_bryan 0:b74591d5ab33 93 return _fs->dir_size(_dir);
be_bryan 0:b74591d5ab33 94 }