Matthew Sims / mbed

Lab 1 Program C

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FileSystemLike.h@44:1c5f591fce58, 2015-09-29 (annotated)

Committer:
mattsims12
Date:
Tue Sep 29 03:04:58 2015 +0000
Revision:
44:1c5f591fce58
Parent:
43:aff670d0d510 
Lab 1 Program C

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rolf.meyer@arm.com 11:1c1ebd0324fa 1 /* mbed Microcontroller Library - FileSystemLike
rolf.meyer@arm.com 11:1c1ebd0324fa 2 * Copyright (c) 2008-2009 ARM Limited. All rights reserved.
rolf.meyer@arm.com 11:1c1ebd0324fa 3 */
rolf.meyer@arm.com 11:1c1ebd0324fa 4
simon.ford@mbed.co.uk 4:5d1359a283bc 5 #ifndef MBED_FILESYSTEMLIKE_H
simon.ford@mbed.co.uk 4:5d1359a283bc 6 #define MBED_FILESYSTEMLIKE_H
simon.ford@mbed.co.uk 4:5d1359a283bc 7
simon.ford@mbed.co.uk 4:5d1359a283bc 8 #ifdef __ARMCC_VERSION
simon.ford@mbed.co.uk 4:5d1359a283bc 9 # define O_RDONLY 0
simon.ford@mbed.co.uk 4:5d1359a283bc 10 # define O_WRONLY 1
simon.ford@mbed.co.uk 4:5d1359a283bc 11 # define O_RDWR 2
simon.ford@mbed.co.uk 4:5d1359a283bc 12 # define O_CREAT 0x0200
simon.ford@mbed.co.uk 5:62573be585e9 13 # define O_TRUNC 0x0400
simon.ford@mbed.co.uk 4:5d1359a283bc 14 # define O_APPEND 0x0008
simon.ford@mbed.co.uk 8:00a04e5cd407 15 typedef int mode_t;
simon.ford@mbed.co.uk 4:5d1359a283bc 16 #else
simon.ford@mbed.co.uk 4:5d1359a283bc 17 # include <sys/fcntl.h>
simon.ford@mbed.co.uk 4:5d1359a283bc 18 #endif
simon.ford@mbed.co.uk 8:00a04e5cd407 19 #include "Base.h"
simon.ford@mbed.co.uk 8:00a04e5cd407 20 #include "FileHandle.h"
simon.ford@mbed.co.uk 8:00a04e5cd407 21 #include "DirHandle.h"
simon.ford@mbed.co.uk 4:5d1359a283bc 22
simon.ford@mbed.co.uk 4:5d1359a283bc 23 namespace mbed {
simon.ford@mbed.co.uk 4:5d1359a283bc 24
screamer 43:aff670d0d510 25 /** A filesystem-like object is one that can be used to open files
simon.ford@mbed.co.uk 4:5d1359a283bc 26 * though it by fopen("/name/filename", mode)
simon.ford@mbed.co.uk 4:5d1359a283bc 27 *
simon.ford@mbed.co.uk 4:5d1359a283bc 28 * Implementations must define at least open (the default definitions
simon.ford@mbed.co.uk 4:5d1359a283bc 29 * of the rest of the functions just return error values).
simon.ford@mbed.co.uk 4:5d1359a283bc 30 */
simon.ford@mbed.co.uk 4:5d1359a283bc 31 class FileSystemLike : public Base {
simon.ford@mbed.co.uk 4:5d1359a283bc 32
simon.ford@mbed.co.uk 4:5d1359a283bc 33 public:
simon.ford@mbed.co.uk 4:5d1359a283bc 34
screamer 43:aff670d0d510 35 /** FileSystemLike constructor
simon.ford@mbed.co.uk 4:5d1359a283bc 36 *
screamer 43:aff670d0d510 37 * @param name The name to use for the filesystem.
simon.ford@mbed.co.uk 4:5d1359a283bc 38 */
simon.ford@mbed.co.uk 4:5d1359a283bc 39 FileSystemLike(const char *name) : Base(name) {}
simon.ford@mbed.co.uk 4:5d1359a283bc 40
screamer 43:aff670d0d510 41 /** Opens a file from the filesystem
simon.ford@mbed.co.uk 4:5d1359a283bc 42 *
screamer 43:aff670d0d510 43 * @param filename The name of the file to open.
screamer 43:aff670d0d510 44 * @param flags One of O_RDONLY, O_WRONLY, or O_RDWR, OR'd with
simon.ford@mbed.co.uk 5:62573be585e9 45 * zero or more of O_CREAT, O_TRUNC, or O_APPEND.
screamer 43:aff670d0d510 46 *
screamer 43:aff670d0d510 47 * @returns
screamer 43:aff670d0d510 48 * A pointer to a FileHandle object representing the
screamer 43:aff670d0d510 49 * file on success, or NULL on failure.
simon.ford@mbed.co.uk 4:5d1359a283bc 50 */
simon.ford@mbed.co.uk 4:5d1359a283bc 51 virtual FileHandle *open(const char *filename, int flags) = 0;
simon.ford@mbed.co.uk 4:5d1359a283bc 52
screamer 43:aff670d0d510 53 /** Remove a file from the filesystem.
simon.ford@mbed.co.uk 4:5d1359a283bc 54 *
screamer 43:aff670d0d510 55 * @param filename the name of the file to remove.
screamer 43:aff670d0d510 56 * @param returns 0 on success, -1 on failure.
simon.ford@mbed.co.uk 4:5d1359a283bc 57 */
simon.ford@mbed.co.uk 4:5d1359a283bc 58 virtual int remove(const char *filename) { return -1; };
simon.ford@mbed.co.uk 4:5d1359a283bc 59
screamer 43:aff670d0d510 60 /** Rename a file in the filesystem.
simon.ford@mbed.co.uk 4:5d1359a283bc 61 *
screamer 43:aff670d0d510 62 * @param oldname the name of the file to rename.
screamer 43:aff670d0d510 63 * @param newname the name to rename it to.
screamer 43:aff670d0d510 64 *
screamer 43:aff670d0d510 65 * @returns
screamer 43:aff670d0d510 66 * 0 on success,
screamer 43:aff670d0d510 67 * -1 on failure.
simon.ford@mbed.co.uk 4:5d1359a283bc 68 */
simon.ford@mbed.co.uk 4:5d1359a283bc 69 virtual int rename(const char *oldname, const char *newname) { return -1; };
simon.ford@mbed.co.uk 4:5d1359a283bc 70
screamer 43:aff670d0d510 71 /** Opens a directory in the filesystem and returns a DirHandle
screamer 43:aff670d0d510 72 * representing the directory stream.
simon.ford@mbed.co.uk 8:00a04e5cd407 73 *
screamer 43:aff670d0d510 74 * @param name The name of the directory to open.
screamer 43:aff670d0d510 75 *
screamer 43:aff670d0d510 76 * @returns
screamer 43:aff670d0d510 77 * A DirHandle representing the directory stream, or
screamer 43:aff670d0d510 78 * NULL on failure.
simon.ford@mbed.co.uk 8:00a04e5cd407 79 */
simon.ford@mbed.co.uk 8:00a04e5cd407 80 virtual DirHandle *opendir(const char *name) { return NULL; };
simon.ford@mbed.co.uk 8:00a04e5cd407 81
screamer 43:aff670d0d510 82 /** Creates a directory in the filesystem.
simon.ford@mbed.co.uk 8:00a04e5cd407 83 *
screamer 43:aff670d0d510 84 * @param name The name of the directory to create.
screamer 43:aff670d0d510 85 * @param mode The permissions to create the directory with.
screamer 43:aff670d0d510 86 *
screamer 43:aff670d0d510 87 * @returns
screamer 43:aff670d0d510 88 * 0 on success,
screamer 43:aff670d0d510 89 * -1 on failure.
simon.ford@mbed.co.uk 8:00a04e5cd407 90 */
simon.ford@mbed.co.uk 8:00a04e5cd407 91 virtual int mkdir(const char *name, mode_t mode) { return -1; }
simon.ford@mbed.co.uk 8:00a04e5cd407 92
simon.ford@mbed.co.uk 4:5d1359a283bc 93 // TODO other filesystem functions (mkdir, rm, rn, ls etc)
simon.ford@mbed.co.uk 4:5d1359a283bc 94
simon.ford@mbed.co.uk 4:5d1359a283bc 95 };
simon.ford@mbed.co.uk 4:5d1359a283bc 96
simon.ford@mbed.co.uk 4:5d1359a283bc 97 } // namespace mbed
simon.ford@mbed.co.uk 4:5d1359a283bc 98
simon.ford@mbed.co.uk 4:5d1359a283bc 99 #endif