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mbed-os/features/filesystem/File.cpp@0:9b3d4731edbb, 2018-06-21 (annotated)

Committer:
WFKnight
Date:
Thu Jun 21 13:51:43 2018 +0000
Revision:
0:9b3d4731edbb
UART, RTOS, LED

Who changed what in which revision?

UserRevisionLine numberNew contents of line
WFKnight 0:9b3d4731edbb 1 /* mbed Microcontroller Library
WFKnight 0:9b3d4731edbb 2 * Copyright (c) 2015 ARM Limited
WFKnight 0:9b3d4731edbb 3 *
WFKnight 0:9b3d4731edbb 4 * Licensed under the Apache License, Version 2.0 (the "License");
WFKnight 0:9b3d4731edbb 5 * you may not use this file except in compliance with the License.
WFKnight 0:9b3d4731edbb 6 * You may obtain a copy of the License at
WFKnight 0:9b3d4731edbb 7 *
WFKnight 0:9b3d4731edbb 8 * http://www.apache.org/licenses/LICENSE-2.0
WFKnight 0:9b3d4731edbb 9 *
WFKnight 0:9b3d4731edbb 10 * Unless required by applicable law or agreed to in writing, software
WFKnight 0:9b3d4731edbb 11 * distributed under the License is distributed on an "AS IS" BASIS,
WFKnight 0:9b3d4731edbb 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
WFKnight 0:9b3d4731edbb 13 * See the License for the specific language governing permissions and
WFKnight 0:9b3d4731edbb 14 * limitations under the License.
WFKnight 0:9b3d4731edbb 15 */
WFKnight 0:9b3d4731edbb 16
WFKnight 0:9b3d4731edbb 17 #include "File.h"
WFKnight 0:9b3d4731edbb 18 #include "mbed.h"
WFKnight 0:9b3d4731edbb 19 #include <errno.h>
WFKnight 0:9b3d4731edbb 20
WFKnight 0:9b3d4731edbb 21
WFKnight 0:9b3d4731edbb 22 File::File()
WFKnight 0:9b3d4731edbb 23 : _fs(0), _file(0)
WFKnight 0:9b3d4731edbb 24 {
WFKnight 0:9b3d4731edbb 25 }
WFKnight 0:9b3d4731edbb 26
WFKnight 0:9b3d4731edbb 27 File::File(FileSystem *fs, const char *path, int flags)
WFKnight 0:9b3d4731edbb 28 : _fs(0), _file(0)
WFKnight 0:9b3d4731edbb 29 {
WFKnight 0:9b3d4731edbb 30 open(fs, path, flags);
WFKnight 0:9b3d4731edbb 31 }
WFKnight 0:9b3d4731edbb 32
WFKnight 0:9b3d4731edbb 33 File::~File()
WFKnight 0:9b3d4731edbb 34 {
WFKnight 0:9b3d4731edbb 35 if (_fs) {
WFKnight 0:9b3d4731edbb 36 close();
WFKnight 0:9b3d4731edbb 37 }
WFKnight 0:9b3d4731edbb 38 }
WFKnight 0:9b3d4731edbb 39
WFKnight 0:9b3d4731edbb 40 int File::open(FileSystem *fs, const char *path, int flags)
WFKnight 0:9b3d4731edbb 41 {
WFKnight 0:9b3d4731edbb 42 if (_fs) {
WFKnight 0:9b3d4731edbb 43 return -EINVAL;
WFKnight 0:9b3d4731edbb 44 }
WFKnight 0:9b3d4731edbb 45
WFKnight 0:9b3d4731edbb 46 int err = fs->file_open(&_file, path, flags);
WFKnight 0:9b3d4731edbb 47 if (!err) {
WFKnight 0:9b3d4731edbb 48 _fs = fs;
WFKnight 0:9b3d4731edbb 49 }
WFKnight 0:9b3d4731edbb 50
WFKnight 0:9b3d4731edbb 51 return err;
WFKnight 0:9b3d4731edbb 52 }
WFKnight 0:9b3d4731edbb 53
WFKnight 0:9b3d4731edbb 54 int File::close()
WFKnight 0:9b3d4731edbb 55 {
WFKnight 0:9b3d4731edbb 56 if (!_fs) {
WFKnight 0:9b3d4731edbb 57 return -EINVAL;
WFKnight 0:9b3d4731edbb 58 }
WFKnight 0:9b3d4731edbb 59
WFKnight 0:9b3d4731edbb 60 int err = _fs->file_close(_file);
WFKnight 0:9b3d4731edbb 61 _fs = 0;
WFKnight 0:9b3d4731edbb 62 return err;
WFKnight 0:9b3d4731edbb 63 }
WFKnight 0:9b3d4731edbb 64
WFKnight 0:9b3d4731edbb 65 ssize_t File::read(void *buffer, size_t len)
WFKnight 0:9b3d4731edbb 66 {
WFKnight 0:9b3d4731edbb 67 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 68 return _fs->file_read(_file, buffer, len);
WFKnight 0:9b3d4731edbb 69 }
WFKnight 0:9b3d4731edbb 70
WFKnight 0:9b3d4731edbb 71 ssize_t File::write(const void *buffer, size_t len)
WFKnight 0:9b3d4731edbb 72 {
WFKnight 0:9b3d4731edbb 73 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 74 return _fs->file_write(_file, buffer, len);
WFKnight 0:9b3d4731edbb 75 }
WFKnight 0:9b3d4731edbb 76
WFKnight 0:9b3d4731edbb 77 int File::sync()
WFKnight 0:9b3d4731edbb 78 {
WFKnight 0:9b3d4731edbb 79 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 80 return _fs->file_sync(_file);
WFKnight 0:9b3d4731edbb 81 }
WFKnight 0:9b3d4731edbb 82
WFKnight 0:9b3d4731edbb 83 int File::isatty()
WFKnight 0:9b3d4731edbb 84 {
WFKnight 0:9b3d4731edbb 85 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 86 return _fs->file_isatty(_file);
WFKnight 0:9b3d4731edbb 87 }
WFKnight 0:9b3d4731edbb 88
WFKnight 0:9b3d4731edbb 89 off_t File::seek(off_t offset, int whence)
WFKnight 0:9b3d4731edbb 90 {
WFKnight 0:9b3d4731edbb 91 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 92 return _fs->file_seek(_file, offset, whence);
WFKnight 0:9b3d4731edbb 93 }
WFKnight 0:9b3d4731edbb 94
WFKnight 0:9b3d4731edbb 95 off_t File::tell()
WFKnight 0:9b3d4731edbb 96 {
WFKnight 0:9b3d4731edbb 97 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 98 return _fs->file_tell(_file);
WFKnight 0:9b3d4731edbb 99 }
WFKnight 0:9b3d4731edbb 100
WFKnight 0:9b3d4731edbb 101 void File::rewind()
WFKnight 0:9b3d4731edbb 102 {
WFKnight 0:9b3d4731edbb 103 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 104 return _fs->file_rewind(_file);
WFKnight 0:9b3d4731edbb 105 }
WFKnight 0:9b3d4731edbb 106
WFKnight 0:9b3d4731edbb 107 off_t File::size()
WFKnight 0:9b3d4731edbb 108 {
WFKnight 0:9b3d4731edbb 109 MBED_ASSERT(_fs);
WFKnight 0:9b3d4731edbb 110 return _fs->file_size(_file);
WFKnight 0:9b3d4731edbb 111 }
WFKnight 0:9b3d4731edbb 112