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Fork of mbed-stm32l0/l1-src by lzbp li

api/DirHandle.h@9:0ce32e54c9a7, 2013-06-10 (annotated)

Committer:
emilmont
Date:
Mon Jun 10 16:03:00 2013 +0100
Revision:
9:0ce32e54c9a7
Parent:
cpp/DirHandle.h@2:143cac498751
Child:
10:3bc89ef62ce7
Refactoring of the mbed SDK:

- Provide a well defined HAL and API

- Keep separated the HAL implementations for the different targets

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:fd0d7bdfcdc2 1 /* mbed Microcontroller Library
emilmont 2:143cac498751 2 * Copyright (c) 2006-2013 ARM Limited
mbed_official 0:fd0d7bdfcdc2 3 *
emilmont 2:143cac498751 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 2:143cac498751 5 * you may not use this file except in compliance with the License.
emilmont 2:143cac498751 6 * You may obtain a copy of the License at
mbed_official 0:fd0d7bdfcdc2 7 *
emilmont 2:143cac498751 8 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:fd0d7bdfcdc2 9 *
emilmont 2:143cac498751 10 * Unless required by applicable law or agreed to in writing, software
emilmont 2:143cac498751 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 2:143cac498751 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 2:143cac498751 13 * See the License for the specific language governing permissions and
emilmont 2:143cac498751 14 * limitations under the License.
mbed_official 0:fd0d7bdfcdc2 15 */
mbed_official 0:fd0d7bdfcdc2 16 #ifndef MBED_DIRHANDLE_H
mbed_official 0:fd0d7bdfcdc2 17 #define MBED_DIRHANDLE_H
mbed_official 0:fd0d7bdfcdc2 18
emilmont 2:143cac498751 19 #if defined(__ARMCC_VERSION) || defined(__ICCARM__)
emilmont 2:143cac498751 20 # define NAME_MAX 255
mbed_official 0:fd0d7bdfcdc2 21 typedef int mode_t;
emilmont 2:143cac498751 22
mbed_official 0:fd0d7bdfcdc2 23 #else
emilmont 2:143cac498751 24 # include <sys/syslimits.h>
mbed_official 0:fd0d7bdfcdc2 25 #endif
emilmont 2:143cac498751 26
mbed_official 0:fd0d7bdfcdc2 27 #include "FileHandle.h"
mbed_official 0:fd0d7bdfcdc2 28
mbed_official 0:fd0d7bdfcdc2 29 struct dirent {
mbed_official 0:fd0d7bdfcdc2 30 char d_name[NAME_MAX+1];
mbed_official 0:fd0d7bdfcdc2 31 };
mbed_official 0:fd0d7bdfcdc2 32
mbed_official 0:fd0d7bdfcdc2 33 namespace mbed {
mbed_official 0:fd0d7bdfcdc2 34
mbed_official 0:fd0d7bdfcdc2 35 /** Represents a directory stream. Objects of this type are returned
mbed_official 0:fd0d7bdfcdc2 36 * by a FileSystemLike's opendir method. Implementations must define
mbed_official 0:fd0d7bdfcdc2 37 * at least closedir, readdir and rewinddir.
mbed_official 0:fd0d7bdfcdc2 38 *
mbed_official 0:fd0d7bdfcdc2 39 * If a FileSystemLike class defines the opendir method, then the
emilmont 2:143cac498751 40 * directories of an object of that type can be accessed by
mbed_official 0:fd0d7bdfcdc2 41 * DIR *d = opendir("/example/directory") (or opendir("/example")
mbed_official 0:fd0d7bdfcdc2 42 * to open the root of the filesystem), and then using readdir(d) etc.
mbed_official 0:fd0d7bdfcdc2 43 *
mbed_official 0:fd0d7bdfcdc2 44 * The root directory is considered to contain all FileLike and
mbed_official 0:fd0d7bdfcdc2 45 * FileSystemLike objects, so the DIR* returned by opendir("/") will
mbed_official 0:fd0d7bdfcdc2 46 * reflect this.
mbed_official 0:fd0d7bdfcdc2 47 */
mbed_official 0:fd0d7bdfcdc2 48 class DirHandle {
mbed_official 0:fd0d7bdfcdc2 49
mbed_official 0:fd0d7bdfcdc2 50 public:
mbed_official 0:fd0d7bdfcdc2 51 /** Closes the directory.
mbed_official 0:fd0d7bdfcdc2 52 *
mbed_official 0:fd0d7bdfcdc2 53 * @returns
mbed_official 0:fd0d7bdfcdc2 54 * 0 on success,
mbed_official 0:fd0d7bdfcdc2 55 * -1 on error.
mbed_official 0:fd0d7bdfcdc2 56 */
mbed_official 0:fd0d7bdfcdc2 57 virtual int closedir()=0;
emilmont 2:143cac498751 58
mbed_official 0:fd0d7bdfcdc2 59 /** Return the directory entry at the current position, and
mbed_official 0:fd0d7bdfcdc2 60 * advances the position to the next entry.
mbed_official 0:fd0d7bdfcdc2 61 *
mbed_official 0:fd0d7bdfcdc2 62 * @returns
mbed_official 0:fd0d7bdfcdc2 63 * A pointer to a dirent structure representing the
mbed_official 0:fd0d7bdfcdc2 64 * directory entry at the current position, or NULL on reaching
mbed_official 0:fd0d7bdfcdc2 65 * end of directory or error.
mbed_official 0:fd0d7bdfcdc2 66 */
mbed_official 0:fd0d7bdfcdc2 67 virtual struct dirent *readdir()=0;
mbed_official 0:fd0d7bdfcdc2 68
mbed_official 0:fd0d7bdfcdc2 69 /** Resets the position to the beginning of the directory.
mbed_official 0:fd0d7bdfcdc2 70 */
mbed_official 0:fd0d7bdfcdc2 71 virtual void rewinddir()=0;
mbed_official 0:fd0d7bdfcdc2 72
mbed_official 0:fd0d7bdfcdc2 73 /** Returns the current position of the DirHandle.
mbed_official 0:fd0d7bdfcdc2 74 *
mbed_official 0:fd0d7bdfcdc2 75 * @returns
mbed_official 0:fd0d7bdfcdc2 76 * the current position,
mbed_official 0:fd0d7bdfcdc2 77 * -1 on error.
mbed_official 0:fd0d7bdfcdc2 78 */
mbed_official 0:fd0d7bdfcdc2 79 virtual off_t telldir() { return -1; }
mbed_official 0:fd0d7bdfcdc2 80
mbed_official 0:fd0d7bdfcdc2 81 /** Sets the position of the DirHandle.
mbed_official 0:fd0d7bdfcdc2 82 *
mbed_official 0:fd0d7bdfcdc2 83 * @param location The location to seek to. Must be a value returned by telldir.
mbed_official 0:fd0d7bdfcdc2 84 */
mbed_official 0:fd0d7bdfcdc2 85 virtual void seekdir(off_t location) { }
emilmont 2:143cac498751 86
mbed_official 0:fd0d7bdfcdc2 87 virtual ~DirHandle() {}
mbed_official 0:fd0d7bdfcdc2 88 };
mbed_official 0:fd0d7bdfcdc2 89
mbed_official 0:fd0d7bdfcdc2 90 } // namespace mbed
mbed_official 0:fd0d7bdfcdc2 91
mbed_official 0:fd0d7bdfcdc2 92 typedef mbed::DirHandle DIR;
mbed_official 0:fd0d7bdfcdc2 93
mbed_official 0:fd0d7bdfcdc2 94 extern "C" {
mbed_official 0:fd0d7bdfcdc2 95 DIR *opendir(const char*);
mbed_official 0:fd0d7bdfcdc2 96 struct dirent *readdir(DIR *);
mbed_official 0:fd0d7bdfcdc2 97 int closedir(DIR*);
mbed_official 0:fd0d7bdfcdc2 98 void rewinddir(DIR*);
mbed_official 0:fd0d7bdfcdc2 99 long telldir(DIR*);
mbed_official 0:fd0d7bdfcdc2 100 void seekdir(DIR*, long);
mbed_official 0:fd0d7bdfcdc2 101 int mkdir(const char *name, mode_t n);
mbed_official 0:fd0d7bdfcdc2 102 };
mbed_official 0:fd0d7bdfcdc2 103
mbed_official 0:fd0d7bdfcdc2 104 #endif /* MBED_DIRHANDLE_H */