lzbp li / mbed-stm32l0l1-src-un

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

api/DirHandle.h@10:3bc89ef62ce7, 2013-06-14 (annotated)

Committer:
emilmont
Date:
Fri Jun 14 17:49:17 2013 +0100
Revision:
10:3bc89ef62ce7
Parent:
9:0ce32e54c9a7
Child:
13:0645d8841f51
Unify mbed library sources

Who changed what in which revision?

UserRevisionLine numberNew contents of line
emilmont 10:3bc89ef62ce7 1 /* mbed Microcontroller Library
emilmont 10:3bc89ef62ce7 2 * Copyright (c) 2006-2013 ARM Limited
emilmont 10:3bc89ef62ce7 3 *
emilmont 10:3bc89ef62ce7 4 * Licensed under the Apache License, Version 2.0 (the "License");
emilmont 10:3bc89ef62ce7 5 * you may not use this file except in compliance with the License.
emilmont 10:3bc89ef62ce7 6 * You may obtain a copy of the License at
emilmont 10:3bc89ef62ce7 7 *
emilmont 10:3bc89ef62ce7 8 * http://www.apache.org/licenses/LICENSE-2.0
emilmont 10:3bc89ef62ce7 9 *
emilmont 10:3bc89ef62ce7 10 * Unless required by applicable law or agreed to in writing, software
emilmont 10:3bc89ef62ce7 11 * distributed under the License is distributed on an "AS IS" BASIS,
emilmont 10:3bc89ef62ce7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
emilmont 10:3bc89ef62ce7 13 * See the License for the specific language governing permissions and
emilmont 10:3bc89ef62ce7 14 * limitations under the License.
emilmont 10:3bc89ef62ce7 15 */
emilmont 10:3bc89ef62ce7 16 #ifndef MBED_DIRHANDLE_H
emilmont 10:3bc89ef62ce7 17 #define MBED_DIRHANDLE_H
emilmont 10:3bc89ef62ce7 18
emilmont 10:3bc89ef62ce7 19 #if defined(__ARMCC_VERSION) || defined(__ICCARM__)
emilmont 10:3bc89ef62ce7 20 # define NAME_MAX 255
emilmont 10:3bc89ef62ce7 21 typedef int mode_t;
emilmont 10:3bc89ef62ce7 22
emilmont 10:3bc89ef62ce7 23 #else
emilmont 10:3bc89ef62ce7 24 # include <sys/syslimits.h>
emilmont 10:3bc89ef62ce7 25 #endif
emilmont 10:3bc89ef62ce7 26
emilmont 10:3bc89ef62ce7 27 #include "FileHandle.h"
emilmont 10:3bc89ef62ce7 28
emilmont 10:3bc89ef62ce7 29 struct dirent {
emilmont 10:3bc89ef62ce7 30 char d_name[NAME_MAX+1];
emilmont 10:3bc89ef62ce7 31 };
emilmont 10:3bc89ef62ce7 32
emilmont 10:3bc89ef62ce7 33 namespace mbed {
emilmont 10:3bc89ef62ce7 34
emilmont 10:3bc89ef62ce7 35 /** Represents a directory stream. Objects of this type are returned
emilmont 10:3bc89ef62ce7 36 * by a FileSystemLike's opendir method. Implementations must define
emilmont 10:3bc89ef62ce7 37 * at least closedir, readdir and rewinddir.
emilmont 10:3bc89ef62ce7 38 *
emilmont 10:3bc89ef62ce7 39 * If a FileSystemLike class defines the opendir method, then the
emilmont 10:3bc89ef62ce7 40 * directories of an object of that type can be accessed by
emilmont 10:3bc89ef62ce7 41 * DIR *d = opendir("/example/directory") (or opendir("/example")
emilmont 10:3bc89ef62ce7 42 * to open the root of the filesystem), and then using readdir(d) etc.
emilmont 10:3bc89ef62ce7 43 *
emilmont 10:3bc89ef62ce7 44 * The root directory is considered to contain all FileLike and
emilmont 10:3bc89ef62ce7 45 * FileSystemLike objects, so the DIR* returned by opendir("/") will
emilmont 10:3bc89ef62ce7 46 * reflect this.
emilmont 10:3bc89ef62ce7 47 */
emilmont 10:3bc89ef62ce7 48 class DirHandle {
emilmont 10:3bc89ef62ce7 49
emilmont 10:3bc89ef62ce7 50 public:
emilmont 10:3bc89ef62ce7 51 /** Closes the directory.
emilmont 10:3bc89ef62ce7 52 *
emilmont 10:3bc89ef62ce7 53 * @returns
emilmont 10:3bc89ef62ce7 54 * 0 on success,
emilmont 10:3bc89ef62ce7 55 * -1 on error.
emilmont 10:3bc89ef62ce7 56 */
emilmont 10:3bc89ef62ce7 57 virtual int closedir()=0;
emilmont 10:3bc89ef62ce7 58
emilmont 10:3bc89ef62ce7 59 /** Return the directory entry at the current position, and
emilmont 10:3bc89ef62ce7 60 * advances the position to the next entry.
emilmont 10:3bc89ef62ce7 61 *
emilmont 10:3bc89ef62ce7 62 * @returns
emilmont 10:3bc89ef62ce7 63 * A pointer to a dirent structure representing the
emilmont 10:3bc89ef62ce7 64 * directory entry at the current position, or NULL on reaching
emilmont 10:3bc89ef62ce7 65 * end of directory or error.
emilmont 10:3bc89ef62ce7 66 */
emilmont 10:3bc89ef62ce7 67 virtual struct dirent *readdir()=0;
emilmont 10:3bc89ef62ce7 68
emilmont 10:3bc89ef62ce7 69 /** Resets the position to the beginning of the directory.
emilmont 10:3bc89ef62ce7 70 */
emilmont 10:3bc89ef62ce7 71 virtual void rewinddir()=0;
emilmont 10:3bc89ef62ce7 72
emilmont 10:3bc89ef62ce7 73 /** Returns the current position of the DirHandle.
emilmont 10:3bc89ef62ce7 74 *
emilmont 10:3bc89ef62ce7 75 * @returns
emilmont 10:3bc89ef62ce7 76 * the current position,
emilmont 10:3bc89ef62ce7 77 * -1 on error.
emilmont 10:3bc89ef62ce7 78 */
emilmont 10:3bc89ef62ce7 79 virtual off_t telldir() { return -1; }
emilmont 10:3bc89ef62ce7 80
emilmont 10:3bc89ef62ce7 81 /** Sets the position of the DirHandle.
emilmont 10:3bc89ef62ce7 82 *
emilmont 10:3bc89ef62ce7 83 * @param location The location to seek to. Must be a value returned by telldir.
emilmont 10:3bc89ef62ce7 84 */
emilmont 10:3bc89ef62ce7 85 virtual void seekdir(off_t location) { }
emilmont 10:3bc89ef62ce7 86
emilmont 10:3bc89ef62ce7 87 virtual ~DirHandle() {}
emilmont 10:3bc89ef62ce7 88 };
emilmont 10:3bc89ef62ce7 89
emilmont 10:3bc89ef62ce7 90 } // namespace mbed
emilmont 10:3bc89ef62ce7 91
emilmont 10:3bc89ef62ce7 92 typedef mbed::DirHandle DIR;
emilmont 10:3bc89ef62ce7 93
emilmont 10:3bc89ef62ce7 94 extern "C" {
emilmont 10:3bc89ef62ce7 95 DIR *opendir(const char*);
emilmont 10:3bc89ef62ce7 96 struct dirent *readdir(DIR *);
emilmont 10:3bc89ef62ce7 97 int closedir(DIR*);
emilmont 10:3bc89ef62ce7 98 void rewinddir(DIR*);
emilmont 10:3bc89ef62ce7 99 long telldir(DIR*);
emilmont 10:3bc89ef62ce7 100 void seekdir(DIR*, long);
emilmont 10:3bc89ef62ce7 101 int mkdir(const char *name, mode_t n);
emilmont 10:3bc89ef62ce7 102 };
emilmont 10:3bc89ef62ce7 103
emilmont 10:3bc89ef62ce7 104 #endif /* MBED_DIRHANDLE_H */