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FileSystemLike.h
00001 /* mbed Microcontroller Library 00002 * Copyright (c) 2006-2013 ARM Limited 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 #ifndef MBED_FILESYSTEMLIKE_H 00017 #define MBED_FILESYSTEMLIKE_H 00018 00019 #include "platform.h" 00020 00021 #include "FileBase.h" 00022 #include "FileHandle.h" 00023 #include "DirHandle.h" 00024 00025 namespace mbed { 00026 00027 /** A filesystem-like object is one that can be used to open files 00028 * though it by fopen("/name/filename", mode) 00029 * 00030 * Implementations must define at least open (the default definitions 00031 * of the rest of the functions just return error values). 00032 */ 00033 class FileSystemLike : public FileBase { 00034 00035 public: 00036 /** FileSystemLike constructor 00037 * 00038 * @param name The name to use for the filesystem. 00039 */ 00040 FileSystemLike(const char *name); 00041 00042 virtual ~FileSystemLike(); 00043 00044 static DirHandle *opendir(); 00045 friend class BaseDirHandle; 00046 00047 /** Opens a file from the filesystem 00048 * 00049 * @param filename The name of the file to open. 00050 * @param flags One of O_RDONLY, O_WRONLY, or O_RDWR, OR'd with 00051 * zero or more of O_CREAT, O_TRUNC, or O_APPEND. 00052 * 00053 * @returns 00054 * A pointer to a FileHandle object representing the 00055 * file on success, or NULL on failure. 00056 */ 00057 virtual FileHandle *open(const char *filename, int flags) = 0; 00058 00059 /** Remove a file from the filesystem. 00060 * 00061 * @param filename the name of the file to remove. 00062 * @param returns 0 on success, -1 on failure. 00063 */ 00064 virtual int remove(const char *filename) { return -1; }; 00065 00066 /** Rename a file in the filesystem. 00067 * 00068 * @param oldname the name of the file to rename. 00069 * @param newname the name to rename it to. 00070 * 00071 * @returns 00072 * 0 on success, 00073 * -1 on failure. 00074 */ 00075 virtual int rename(const char *oldname, const char *newname) { return -1; }; 00076 00077 /** Opens a directory in the filesystem and returns a DirHandle 00078 * representing the directory stream. 00079 * 00080 * @param name The name of the directory to open. 00081 * 00082 * @returns 00083 * A DirHandle representing the directory stream, or 00084 * NULL on failure. 00085 */ 00086 virtual DirHandle *opendir(const char *name) { return NULL; }; 00087 00088 /** Creates a directory in the filesystem. 00089 * 00090 * @param name The name of the directory to create. 00091 * @param mode The permissions to create the directory with. 00092 * 00093 * @returns 00094 * 0 on success, 00095 * -1 on failure. 00096 */ 00097 virtual int mkdir(const char *name, mode_t mode) { return -1; } 00098 00099 // TODO other filesystem functions (mkdir, rm, rn, ls etc) 00100 }; 00101 00102 } // namespace mbed 00103 00104 #endif
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