FileSystem.cpp

00001 
00002 /* mbed Microcontroller Library
00003  * Copyright (c) 2006-2013 ARM Limited
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 #include "mbed.h"
00019 #include "filesystem/FileSystem.h"
00020 #include <errno.h>
00021 
00022 
00023 FileSystem::FileSystem(const char *name)
00024     : FileBase(name, FileSystemPathType)
00025 {
00026 }
00027 
00028 int FileSystem::file_sync(fs_file_t file)
00029 {
00030     return 0;
00031 }
00032 
00033 int FileSystem::file_isatty(fs_file_t file)
00034 {
00035     return false;
00036 }
00037 
00038 off_t FileSystem::file_tell(fs_file_t file)
00039 {
00040     return file_seek(file, 0, SEEK_CUR);
00041 }
00042 
00043 void FileSystem::file_rewind(fs_file_t file)
00044 {
00045     file_seek(file, 0, SEEK_SET);
00046 }
00047 
00048 size_t FileSystem::file_size(fs_file_t file)
00049 {
00050     off_t off = file_tell(file);
00051     size_t size = file_seek(file, 0, SEEK_END);
00052     file_seek(file, off, SEEK_SET);
00053     return size;
00054 }
00055 
00056 int FileSystem::mkdir(const char *path, mode_t mode)
00057 {
00058     return -ENOSYS;
00059 }
00060 
00061 int FileSystem::dir_open(fs_dir_t *dir, const char *path)
00062 {
00063     return -ENOSYS;
00064 }
00065 
00066 int FileSystem::dir_close(fs_dir_t dir)
00067 {
00068     return -ENOSYS;
00069 }
00070 
00071 ssize_t FileSystem::dir_read(fs_dir_t dir, struct dirent *ent)
00072 {
00073     return -ENOSYS;
00074 }
00075 
00076 void FileSystem::dir_seek(fs_dir_t dir, off_t offset)
00077 {
00078 }
00079 
00080 off_t FileSystem::dir_tell(fs_dir_t dir)
00081 {
00082     return 0;
00083 }
00084 
00085 void FileSystem::dir_rewind(fs_dir_t dir)
00086 {
00087     // Note, the may not satisfy rewind on all filesystems
00088     dir_seek(dir, 0);
00089 }
00090 
00091 size_t FileSystem::dir_size(fs_dir_t dir)
00092 {
00093     off_t off = dir_tell(dir);
00094     size_t size = 0;
00095     struct dirent *ent = new struct dirent;
00096 
00097     dir_rewind(dir);
00098     while (true) {
00099         int res = dir_read(dir, ent);
00100         if (res <= 0) {
00101             break;
00102         }
00103 
00104         size += 1;
00105     }
00106     dir_seek(dir, off);
00107 
00108     delete ent;
00109     return size;
00110 }
00111