Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

drivers/FileSystemLike.h@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2006-2013 ARM Limited
elessair 0:f269e3021894 3 *
elessair 0:f269e3021894 4 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 5 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 6 * You may obtain a copy of the License at
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 9 *
elessair 0:f269e3021894 10 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 11 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 13 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 14 * limitations under the License.
elessair 0:f269e3021894 15 */
elessair 0:f269e3021894 16 #ifndef MBED_FILESYSTEMLIKE_H
elessair 0:f269e3021894 17 #define MBED_FILESYSTEMLIKE_H
elessair 0:f269e3021894 18
elessair 0:f269e3021894 19 #include "platform/platform.h"
elessair 0:f269e3021894 20
elessair 0:f269e3021894 21 #include "drivers/FileBase.h"
elessair 0:f269e3021894 22 #include "drivers/FileHandle.h"
elessair 0:f269e3021894 23 #include "drivers/DirHandle.h"
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 namespace mbed {
elessair 0:f269e3021894 26 /** \addtogroup drivers */
elessair 0:f269e3021894 27 /** @{*/
elessair 0:f269e3021894 28
elessair 0:f269e3021894 29 /** A filesystem-like object is one that can be used to open files
elessair 0:f269e3021894 30 * though it by fopen("/name/filename", mode)
elessair 0:f269e3021894 31 *
elessair 0:f269e3021894 32 * Implementations must define at least open (the default definitions
elessair 0:f269e3021894 33 * of the rest of the functions just return error values).
elessair 0:f269e3021894 34 *
elessair 0:f269e3021894 35 * @Note Synchronization level: Set by subclass
elessair 0:f269e3021894 36 */
elessair 0:f269e3021894 37 class FileSystemLike : public FileBase {
elessair 0:f269e3021894 38
elessair 0:f269e3021894 39 public:
elessair 0:f269e3021894 40 /** FileSystemLike constructor
elessair 0:f269e3021894 41 *
elessair 0:f269e3021894 42 * @param name The name to use for the filesystem.
elessair 0:f269e3021894 43 */
elessair 0:f269e3021894 44 FileSystemLike(const char *name);
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 virtual ~FileSystemLike();
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 static DirHandle *opendir();
elessair 0:f269e3021894 49 friend class BaseDirHandle;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 /** Opens a file from the filesystem
elessair 0:f269e3021894 52 *
elessair 0:f269e3021894 53 * @param filename The name of the file to open.
elessair 0:f269e3021894 54 * @param flags One of O_RDONLY, O_WRONLY, or O_RDWR, OR'd with
elessair 0:f269e3021894 55 * zero or more of O_CREAT, O_TRUNC, or O_APPEND.
elessair 0:f269e3021894 56 *
elessair 0:f269e3021894 57 * @returns
elessair 0:f269e3021894 58 * A pointer to a FileHandle object representing the
elessair 0:f269e3021894 59 * file on success, or NULL on failure.
elessair 0:f269e3021894 60 */
elessair 0:f269e3021894 61 virtual FileHandle *open(const char *filename, int flags) = 0;
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 /** Remove a file from the filesystem.
elessair 0:f269e3021894 64 *
elessair 0:f269e3021894 65 * @param filename the name of the file to remove.
elessair 0:f269e3021894 66 * @param returns 0 on success, -1 on failure.
elessair 0:f269e3021894 67 */
elessair 0:f269e3021894 68 virtual int remove(const char *filename) { (void) filename; return -1; };
elessair 0:f269e3021894 69
elessair 0:f269e3021894 70 /** Rename a file in the filesystem.
elessair 0:f269e3021894 71 *
elessair 0:f269e3021894 72 * @param oldname the name of the file to rename.
elessair 0:f269e3021894 73 * @param newname the name to rename it to.
elessair 0:f269e3021894 74 *
elessair 0:f269e3021894 75 * @returns
elessair 0:f269e3021894 76 * 0 on success,
elessair 0:f269e3021894 77 * -1 on failure.
elessair 0:f269e3021894 78 */
elessair 0:f269e3021894 79 virtual int rename(const char *oldname, const char *newname) { (void) oldname, (void) newname; return -1; };
elessair 0:f269e3021894 80
elessair 0:f269e3021894 81 /** Opens a directory in the filesystem and returns a DirHandle
elessair 0:f269e3021894 82 * representing the directory stream.
elessair 0:f269e3021894 83 *
elessair 0:f269e3021894 84 * @param name The name of the directory to open.
elessair 0:f269e3021894 85 *
elessair 0:f269e3021894 86 * @returns
elessair 0:f269e3021894 87 * A DirHandle representing the directory stream, or
elessair 0:f269e3021894 88 * NULL on failure.
elessair 0:f269e3021894 89 */
elessair 0:f269e3021894 90 virtual DirHandle *opendir(const char *name) { (void) name; return NULL; };
elessair 0:f269e3021894 91
elessair 0:f269e3021894 92 /** Creates a directory in the filesystem.
elessair 0:f269e3021894 93 *
elessair 0:f269e3021894 94 * @param name The name of the directory to create.
elessair 0:f269e3021894 95 * @param mode The permissions to create the directory with.
elessair 0:f269e3021894 96 *
elessair 0:f269e3021894 97 * @returns
elessair 0:f269e3021894 98 * 0 on success,
elessair 0:f269e3021894 99 * -1 on failure.
elessair 0:f269e3021894 100 */
elessair 0:f269e3021894 101 virtual int mkdir(const char *name, mode_t mode) { (void) name, (void) mode; return -1; }
elessair 0:f269e3021894 102
elessair 0:f269e3021894 103 // TODO other filesystem functions (mkdir, rm, rn, ls etc)
elessair 0:f269e3021894 104 };
elessair 0:f269e3021894 105
elessair 0:f269e3021894 106 } // namespace mbed
elessair 0:f269e3021894 107
elessair 0:f269e3021894 108 #endif
elessair 0:f269e3021894 109
elessair 0:f269e3021894 110 /** @}*/