Daniel Vizcaya / Mbed OS 04_RTOS_Embebidos

Entrega 3er corte - sistemas embebidos

mbed-os/features/filesystem/FileSystem.cpp@1:fcdb45ee95b9, 2018-05-30 (annotated)

Committer:
Bethory
Date:
Wed May 30 04:46:28 2018 +0000
Revision:
1:fcdb45ee95b9
Parent:
0:6ad07c9019fd 
Entrega Final

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bethory 0:6ad07c9019fd 1 /* mbed Microcontroller Library
Bethory 0:6ad07c9019fd 2 * Copyright (c) 2006-2013 ARM Limited
Bethory 0:6ad07c9019fd 3 *
Bethory 0:6ad07c9019fd 4 * Licensed under the Apache License, Version 2.0 (the "License");
Bethory 0:6ad07c9019fd 5 * you may not use this file except in compliance with the License.
Bethory 0:6ad07c9019fd 6 * You may obtain a copy of the License at
Bethory 0:6ad07c9019fd 7 *
Bethory 0:6ad07c9019fd 8 * http://www.apache.org/licenses/LICENSE-2.0
Bethory 0:6ad07c9019fd 9 *
Bethory 0:6ad07c9019fd 10 * Unless required by applicable law or agreed to in writing, software
Bethory 0:6ad07c9019fd 11 * distributed under the License is distributed on an "AS IS" BASIS,
Bethory 0:6ad07c9019fd 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
Bethory 0:6ad07c9019fd 13 * See the License for the specific language governing permissions and
Bethory 0:6ad07c9019fd 14 * limitations under the License.
Bethory 0:6ad07c9019fd 15 */
Bethory 0:6ad07c9019fd 16
Bethory 0:6ad07c9019fd 17 #include "mbed.h"
Bethory 0:6ad07c9019fd 18 #include "filesystem/Dir.h"
Bethory 0:6ad07c9019fd 19 #include "filesystem/File.h"
Bethory 0:6ad07c9019fd 20 #include "filesystem/FileSystem.h"
Bethory 0:6ad07c9019fd 21 #include <errno.h>
Bethory 0:6ad07c9019fd 22
Bethory 0:6ad07c9019fd 23
Bethory 0:6ad07c9019fd 24 FileSystem::FileSystem(const char *name)
Bethory 0:6ad07c9019fd 25 : FileSystemLike(name)
Bethory 0:6ad07c9019fd 26 {
Bethory 0:6ad07c9019fd 27 }
Bethory 0:6ad07c9019fd 28
Bethory 0:6ad07c9019fd 29 int FileSystem::reformat(BlockDevice *bd)
Bethory 0:6ad07c9019fd 30 {
Bethory 0:6ad07c9019fd 31 return -ENOSYS;
Bethory 0:6ad07c9019fd 32 }
Bethory 0:6ad07c9019fd 33
Bethory 0:6ad07c9019fd 34 int FileSystem::remove(const char *path)
Bethory 0:6ad07c9019fd 35 {
Bethory 0:6ad07c9019fd 36 return -ENOSYS;
Bethory 0:6ad07c9019fd 37 }
Bethory 0:6ad07c9019fd 38
Bethory 0:6ad07c9019fd 39 int FileSystem::rename(const char *path, const char *newpath)
Bethory 0:6ad07c9019fd 40 {
Bethory 0:6ad07c9019fd 41 return -ENOSYS;
Bethory 0:6ad07c9019fd 42 }
Bethory 0:6ad07c9019fd 43
Bethory 0:6ad07c9019fd 44 int FileSystem::stat(const char *path, struct stat *st)
Bethory 0:6ad07c9019fd 45 {
Bethory 0:6ad07c9019fd 46 return -ENOSYS;
Bethory 0:6ad07c9019fd 47 }
Bethory 0:6ad07c9019fd 48
Bethory 0:6ad07c9019fd 49 int FileSystem::mkdir(const char *path, mode_t mode)
Bethory 0:6ad07c9019fd 50 {
Bethory 0:6ad07c9019fd 51 return -ENOSYS;
Bethory 0:6ad07c9019fd 52 }
Bethory 0:6ad07c9019fd 53
Bethory 0:6ad07c9019fd 54 int FileSystem::statvfs(const char *path, struct statvfs *buf)
Bethory 0:6ad07c9019fd 55 {
Bethory 0:6ad07c9019fd 56 return -ENOSYS;
Bethory 0:6ad07c9019fd 57 }
Bethory 0:6ad07c9019fd 58
Bethory 0:6ad07c9019fd 59 int FileSystem::file_sync(fs_file_t file)
Bethory 0:6ad07c9019fd 60 {
Bethory 0:6ad07c9019fd 61 return 0;
Bethory 0:6ad07c9019fd 62 }
Bethory 0:6ad07c9019fd 63
Bethory 0:6ad07c9019fd 64 int FileSystem::file_isatty(fs_file_t file)
Bethory 0:6ad07c9019fd 65 {
Bethory 0:6ad07c9019fd 66 return false;
Bethory 0:6ad07c9019fd 67 }
Bethory 0:6ad07c9019fd 68
Bethory 0:6ad07c9019fd 69 off_t FileSystem::file_tell(fs_file_t file)
Bethory 0:6ad07c9019fd 70 {
Bethory 0:6ad07c9019fd 71 return file_seek(file, 0, SEEK_CUR);
Bethory 0:6ad07c9019fd 72 }
Bethory 0:6ad07c9019fd 73
Bethory 0:6ad07c9019fd 74 void FileSystem::file_rewind(fs_file_t file)
Bethory 0:6ad07c9019fd 75 {
Bethory 0:6ad07c9019fd 76 file_seek(file, 0, SEEK_SET);
Bethory 0:6ad07c9019fd 77 }
Bethory 0:6ad07c9019fd 78
Bethory 0:6ad07c9019fd 79 off_t FileSystem::file_size(fs_file_t file)
Bethory 0:6ad07c9019fd 80 {
Bethory 0:6ad07c9019fd 81 off_t off = file_tell(file);
Bethory 0:6ad07c9019fd 82 off_t size = file_seek(file, 0, SEEK_END);
Bethory 0:6ad07c9019fd 83 file_seek(file, off, SEEK_SET);
Bethory 0:6ad07c9019fd 84 return size;
Bethory 0:6ad07c9019fd 85 }
Bethory 0:6ad07c9019fd 86
Bethory 0:6ad07c9019fd 87 int FileSystem::dir_open(fs_dir_t *dir, const char *path)
Bethory 0:6ad07c9019fd 88 {
Bethory 0:6ad07c9019fd 89 return -ENOSYS;
Bethory 0:6ad07c9019fd 90 }
Bethory 0:6ad07c9019fd 91
Bethory 0:6ad07c9019fd 92 int FileSystem::dir_close(fs_dir_t dir)
Bethory 0:6ad07c9019fd 93 {
Bethory 0:6ad07c9019fd 94 return -ENOSYS;
Bethory 0:6ad07c9019fd 95 }
Bethory 0:6ad07c9019fd 96
Bethory 0:6ad07c9019fd 97 ssize_t FileSystem::dir_read(fs_dir_t dir, struct dirent *ent)
Bethory 0:6ad07c9019fd 98 {
Bethory 0:6ad07c9019fd 99 return -ENOSYS;
Bethory 0:6ad07c9019fd 100 }
Bethory 0:6ad07c9019fd 101
Bethory 0:6ad07c9019fd 102 void FileSystem::dir_seek(fs_dir_t dir, off_t offset)
Bethory 0:6ad07c9019fd 103 {
Bethory 0:6ad07c9019fd 104 }
Bethory 0:6ad07c9019fd 105
Bethory 0:6ad07c9019fd 106 off_t FileSystem::dir_tell(fs_dir_t dir)
Bethory 0:6ad07c9019fd 107 {
Bethory 0:6ad07c9019fd 108 return 0;
Bethory 0:6ad07c9019fd 109 }
Bethory 0:6ad07c9019fd 110
Bethory 0:6ad07c9019fd 111 void FileSystem::dir_rewind(fs_dir_t dir)
Bethory 0:6ad07c9019fd 112 {
Bethory 0:6ad07c9019fd 113 // Note, the may not satisfy rewind on all filesystems
Bethory 0:6ad07c9019fd 114 dir_seek(dir, 0);
Bethory 0:6ad07c9019fd 115 }
Bethory 0:6ad07c9019fd 116
Bethory 0:6ad07c9019fd 117 size_t FileSystem::dir_size(fs_dir_t dir)
Bethory 0:6ad07c9019fd 118 {
Bethory 0:6ad07c9019fd 119 off_t off = dir_tell(dir);
Bethory 0:6ad07c9019fd 120 size_t size = 0;
Bethory 0:6ad07c9019fd 121 struct dirent *ent = new struct dirent;
Bethory 0:6ad07c9019fd 122
Bethory 0:6ad07c9019fd 123 dir_rewind(dir);
Bethory 0:6ad07c9019fd 124 while (true) {
Bethory 0:6ad07c9019fd 125 int res = dir_read(dir, ent);
Bethory 0:6ad07c9019fd 126 if (res <= 0) {
Bethory 0:6ad07c9019fd 127 break;
Bethory 0:6ad07c9019fd 128 }
Bethory 0:6ad07c9019fd 129
Bethory 0:6ad07c9019fd 130 size += 1;
Bethory 0:6ad07c9019fd 131 }
Bethory 0:6ad07c9019fd 132 dir_seek(dir, off);
Bethory 0:6ad07c9019fd 133
Bethory 0:6ad07c9019fd 134 delete ent;
Bethory 0:6ad07c9019fd 135 return size;
Bethory 0:6ad07c9019fd 136 }
Bethory 0:6ad07c9019fd 137
Bethory 0:6ad07c9019fd 138 // Internally used file wrapper that manages memory on close
Bethory 0:6ad07c9019fd 139 template <typename F>
Bethory 0:6ad07c9019fd 140 class Managed : public F {
Bethory 0:6ad07c9019fd 141 public:
Bethory 0:6ad07c9019fd 142 virtual int close() {
Bethory 0:6ad07c9019fd 143 int err = F::close();
Bethory 0:6ad07c9019fd 144 delete this;
Bethory 0:6ad07c9019fd 145 return err;
Bethory 0:6ad07c9019fd 146 }
Bethory 0:6ad07c9019fd 147 };
Bethory 0:6ad07c9019fd 148
Bethory 0:6ad07c9019fd 149 int FileSystem::open(FileHandle **file, const char *path, int flags)
Bethory 0:6ad07c9019fd 150 {
Bethory 0:6ad07c9019fd 151 File *f = new Managed<File>;
Bethory 0:6ad07c9019fd 152 int err = f->open(this, path, flags);
Bethory 0:6ad07c9019fd 153 if (err) {
Bethory 0:6ad07c9019fd 154 delete f;
Bethory 0:6ad07c9019fd 155 return err;
Bethory 0:6ad07c9019fd 156 }
Bethory 0:6ad07c9019fd 157
Bethory 0:6ad07c9019fd 158 *file = f;
Bethory 0:6ad07c9019fd 159 return 0;
Bethory 0:6ad07c9019fd 160 }
Bethory 0:6ad07c9019fd 161
Bethory 0:6ad07c9019fd 162 int FileSystem::open(DirHandle **dir, const char *path) {
Bethory 0:6ad07c9019fd 163 Dir *d = new Managed<Dir>;
Bethory 0:6ad07c9019fd 164 int err = d->open(this, path);
Bethory 0:6ad07c9019fd 165 if (err) {
Bethory 0:6ad07c9019fd 166 delete d;
Bethory 0:6ad07c9019fd 167 return err;
Bethory 0:6ad07c9019fd 168 }
Bethory 0:6ad07c9019fd 169
Bethory 0:6ad07c9019fd 170 *dir = d;
Bethory 0:6ad07c9019fd 171 return 0;
Bethory 0:6ad07c9019fd 172 }