Marco Zecchini / Mbed OS Example_RTOS

Rtos API example

mbed-os/features/filesystem/FileSystem.cpp@0:9fca2b23d0ba, 2019-02-23 (annotated)

Committer:
marcozecchini
Date:
Sat Feb 23 12:13:36 2019 +0000
Revision:
0:9fca2b23d0ba
final commit

Who changed what in which revision?

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marcozecchini 0:9fca2b23d0ba 1 /* mbed Microcontroller Library
marcozecchini 0:9fca2b23d0ba 2 * Copyright (c) 2006-2013 ARM Limited
marcozecchini 0:9fca2b23d0ba 3 *
marcozecchini 0:9fca2b23d0ba 4 * Licensed under the Apache License, Version 2.0 (the "License");
marcozecchini 0:9fca2b23d0ba 5 * you may not use this file except in compliance with the License.
marcozecchini 0:9fca2b23d0ba 6 * You may obtain a copy of the License at
marcozecchini 0:9fca2b23d0ba 7 *
marcozecchini 0:9fca2b23d0ba 8 * http://www.apache.org/licenses/LICENSE-2.0
marcozecchini 0:9fca2b23d0ba 9 *
marcozecchini 0:9fca2b23d0ba 10 * Unless required by applicable law or agreed to in writing, software
marcozecchini 0:9fca2b23d0ba 11 * distributed under the License is distributed on an "AS IS" BASIS,
marcozecchini 0:9fca2b23d0ba 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
marcozecchini 0:9fca2b23d0ba 13 * See the License for the specific language governing permissions and
marcozecchini 0:9fca2b23d0ba 14 * limitations under the License.
marcozecchini 0:9fca2b23d0ba 15 */
marcozecchini 0:9fca2b23d0ba 16
marcozecchini 0:9fca2b23d0ba 17 #include "mbed.h"
marcozecchini 0:9fca2b23d0ba 18 #include "filesystem/Dir.h"
marcozecchini 0:9fca2b23d0ba 19 #include "filesystem/File.h"
marcozecchini 0:9fca2b23d0ba 20 #include "filesystem/FileSystem.h"
marcozecchini 0:9fca2b23d0ba 21 #include <errno.h>
marcozecchini 0:9fca2b23d0ba 22
marcozecchini 0:9fca2b23d0ba 23
marcozecchini 0:9fca2b23d0ba 24 FileSystem::FileSystem(const char *name)
marcozecchini 0:9fca2b23d0ba 25 : FileSystemLike(name)
marcozecchini 0:9fca2b23d0ba 26 {
marcozecchini 0:9fca2b23d0ba 27 }
marcozecchini 0:9fca2b23d0ba 28
marcozecchini 0:9fca2b23d0ba 29 int FileSystem::reformat(BlockDevice *bd)
marcozecchini 0:9fca2b23d0ba 30 {
marcozecchini 0:9fca2b23d0ba 31 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 32 }
marcozecchini 0:9fca2b23d0ba 33
marcozecchini 0:9fca2b23d0ba 34 int FileSystem::remove(const char *path)
marcozecchini 0:9fca2b23d0ba 35 {
marcozecchini 0:9fca2b23d0ba 36 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 37 }
marcozecchini 0:9fca2b23d0ba 38
marcozecchini 0:9fca2b23d0ba 39 int FileSystem::rename(const char *path, const char *newpath)
marcozecchini 0:9fca2b23d0ba 40 {
marcozecchini 0:9fca2b23d0ba 41 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 42 }
marcozecchini 0:9fca2b23d0ba 43
marcozecchini 0:9fca2b23d0ba 44 int FileSystem::stat(const char *path, struct stat *st)
marcozecchini 0:9fca2b23d0ba 45 {
marcozecchini 0:9fca2b23d0ba 46 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 47 }
marcozecchini 0:9fca2b23d0ba 48
marcozecchini 0:9fca2b23d0ba 49 int FileSystem::mkdir(const char *path, mode_t mode)
marcozecchini 0:9fca2b23d0ba 50 {
marcozecchini 0:9fca2b23d0ba 51 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 52 }
marcozecchini 0:9fca2b23d0ba 53
marcozecchini 0:9fca2b23d0ba 54 int FileSystem::file_sync(fs_file_t file)
marcozecchini 0:9fca2b23d0ba 55 {
marcozecchini 0:9fca2b23d0ba 56 return 0;
marcozecchini 0:9fca2b23d0ba 57 }
marcozecchini 0:9fca2b23d0ba 58
marcozecchini 0:9fca2b23d0ba 59 int FileSystem::file_isatty(fs_file_t file)
marcozecchini 0:9fca2b23d0ba 60 {
marcozecchini 0:9fca2b23d0ba 61 return false;
marcozecchini 0:9fca2b23d0ba 62 }
marcozecchini 0:9fca2b23d0ba 63
marcozecchini 0:9fca2b23d0ba 64 off_t FileSystem::file_tell(fs_file_t file)
marcozecchini 0:9fca2b23d0ba 65 {
marcozecchini 0:9fca2b23d0ba 66 return file_seek(file, 0, SEEK_CUR);
marcozecchini 0:9fca2b23d0ba 67 }
marcozecchini 0:9fca2b23d0ba 68
marcozecchini 0:9fca2b23d0ba 69 void FileSystem::file_rewind(fs_file_t file)
marcozecchini 0:9fca2b23d0ba 70 {
marcozecchini 0:9fca2b23d0ba 71 file_seek(file, 0, SEEK_SET);
marcozecchini 0:9fca2b23d0ba 72 }
marcozecchini 0:9fca2b23d0ba 73
marcozecchini 0:9fca2b23d0ba 74 off_t FileSystem::file_size(fs_file_t file)
marcozecchini 0:9fca2b23d0ba 75 {
marcozecchini 0:9fca2b23d0ba 76 off_t off = file_tell(file);
marcozecchini 0:9fca2b23d0ba 77 off_t size = file_seek(file, 0, SEEK_END);
marcozecchini 0:9fca2b23d0ba 78 file_seek(file, off, SEEK_SET);
marcozecchini 0:9fca2b23d0ba 79 return size;
marcozecchini 0:9fca2b23d0ba 80 }
marcozecchini 0:9fca2b23d0ba 81
marcozecchini 0:9fca2b23d0ba 82 int FileSystem::dir_open(fs_dir_t *dir, const char *path)
marcozecchini 0:9fca2b23d0ba 83 {
marcozecchini 0:9fca2b23d0ba 84 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 85 }
marcozecchini 0:9fca2b23d0ba 86
marcozecchini 0:9fca2b23d0ba 87 int FileSystem::dir_close(fs_dir_t dir)
marcozecchini 0:9fca2b23d0ba 88 {
marcozecchini 0:9fca2b23d0ba 89 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 90 }
marcozecchini 0:9fca2b23d0ba 91
marcozecchini 0:9fca2b23d0ba 92 ssize_t FileSystem::dir_read(fs_dir_t dir, struct dirent *ent)
marcozecchini 0:9fca2b23d0ba 93 {
marcozecchini 0:9fca2b23d0ba 94 return -ENOSYS;
marcozecchini 0:9fca2b23d0ba 95 }
marcozecchini 0:9fca2b23d0ba 96
marcozecchini 0:9fca2b23d0ba 97 void FileSystem::dir_seek(fs_dir_t dir, off_t offset)
marcozecchini 0:9fca2b23d0ba 98 {
marcozecchini 0:9fca2b23d0ba 99 }
marcozecchini 0:9fca2b23d0ba 100
marcozecchini 0:9fca2b23d0ba 101 off_t FileSystem::dir_tell(fs_dir_t dir)
marcozecchini 0:9fca2b23d0ba 102 {
marcozecchini 0:9fca2b23d0ba 103 return 0;
marcozecchini 0:9fca2b23d0ba 104 }
marcozecchini 0:9fca2b23d0ba 105
marcozecchini 0:9fca2b23d0ba 106 void FileSystem::dir_rewind(fs_dir_t dir)
marcozecchini 0:9fca2b23d0ba 107 {
marcozecchini 0:9fca2b23d0ba 108 // Note, the may not satisfy rewind on all filesystems
marcozecchini 0:9fca2b23d0ba 109 dir_seek(dir, 0);
marcozecchini 0:9fca2b23d0ba 110 }
marcozecchini 0:9fca2b23d0ba 111
marcozecchini 0:9fca2b23d0ba 112 size_t FileSystem::dir_size(fs_dir_t dir)
marcozecchini 0:9fca2b23d0ba 113 {
marcozecchini 0:9fca2b23d0ba 114 off_t off = dir_tell(dir);
marcozecchini 0:9fca2b23d0ba 115 size_t size = 0;
marcozecchini 0:9fca2b23d0ba 116 struct dirent *ent = new struct dirent;
marcozecchini 0:9fca2b23d0ba 117
marcozecchini 0:9fca2b23d0ba 118 dir_rewind(dir);
marcozecchini 0:9fca2b23d0ba 119 while (true) {
marcozecchini 0:9fca2b23d0ba 120 int res = dir_read(dir, ent);
marcozecchini 0:9fca2b23d0ba 121 if (res <= 0) {
marcozecchini 0:9fca2b23d0ba 122 break;
marcozecchini 0:9fca2b23d0ba 123 }
marcozecchini 0:9fca2b23d0ba 124
marcozecchini 0:9fca2b23d0ba 125 size += 1;
marcozecchini 0:9fca2b23d0ba 126 }
marcozecchini 0:9fca2b23d0ba 127 dir_seek(dir, off);
marcozecchini 0:9fca2b23d0ba 128
marcozecchini 0:9fca2b23d0ba 129 delete ent;
marcozecchini 0:9fca2b23d0ba 130 return size;
marcozecchini 0:9fca2b23d0ba 131 }
marcozecchini 0:9fca2b23d0ba 132
marcozecchini 0:9fca2b23d0ba 133 // Internally used file wrapper that manages memory on close
marcozecchini 0:9fca2b23d0ba 134 template <typename F>
marcozecchini 0:9fca2b23d0ba 135 class Managed : public F {
marcozecchini 0:9fca2b23d0ba 136 public:
marcozecchini 0:9fca2b23d0ba 137 virtual int close() {
marcozecchini 0:9fca2b23d0ba 138 int err = F::close();
marcozecchini 0:9fca2b23d0ba 139 delete this;
marcozecchini 0:9fca2b23d0ba 140 return err;
marcozecchini 0:9fca2b23d0ba 141 }
marcozecchini 0:9fca2b23d0ba 142 };
marcozecchini 0:9fca2b23d0ba 143
marcozecchini 0:9fca2b23d0ba 144 int FileSystem::open(FileHandle **file, const char *path, int flags)
marcozecchini 0:9fca2b23d0ba 145 {
marcozecchini 0:9fca2b23d0ba 146 File *f = new Managed<File>;
marcozecchini 0:9fca2b23d0ba 147 int err = f->open(this, path, flags);
marcozecchini 0:9fca2b23d0ba 148 if (err) {
marcozecchini 0:9fca2b23d0ba 149 delete f;
marcozecchini 0:9fca2b23d0ba 150 return err;
marcozecchini 0:9fca2b23d0ba 151 }
marcozecchini 0:9fca2b23d0ba 152
marcozecchini 0:9fca2b23d0ba 153 *file = f;
marcozecchini 0:9fca2b23d0ba 154 return 0;
marcozecchini 0:9fca2b23d0ba 155 }
marcozecchini 0:9fca2b23d0ba 156
marcozecchini 0:9fca2b23d0ba 157 int FileSystem::open(DirHandle **dir, const char *path) {
marcozecchini 0:9fca2b23d0ba 158 Dir *d = new Managed<Dir>;
marcozecchini 0:9fca2b23d0ba 159 int err = d->open(this, path);
marcozecchini 0:9fca2b23d0ba 160 if (err) {
marcozecchini 0:9fca2b23d0ba 161 delete d;
marcozecchini 0:9fca2b23d0ba 162 return err;
marcozecchini 0:9fca2b23d0ba 163 }
marcozecchini 0:9fca2b23d0ba 164
marcozecchini 0:9fca2b23d0ba 165 *dir = d;
marcozecchini 0:9fca2b23d0ba 166 return 0;
marcozecchini 0:9fca2b23d0ba 167 }