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mbed/LocalFileSystem.h@17:d1594579eec6, 2017-05-19 (annotated)

Committer:
ClementBreteau
Date:
Fri May 19 17:14:07 2017 +0000
Revision:
17:d1594579eec6
Parent:
0:ad97421fb1fb 
strat du robot, 19-05-2017, 19h

Who changed what in which revision?

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antbig 0:ad97421fb1fb 1 /* mbed Microcontroller Library - LocalFileSystem
antbig 0:ad97421fb1fb 2 * Copyright (c) 2008-2009 ARM Limited. All rights reserved.
antbig 0:ad97421fb1fb 3 */
antbig 0:ad97421fb1fb 4
antbig 0:ad97421fb1fb 5 #ifndef MBED_LOCALFILESYSTEM_H
antbig 0:ad97421fb1fb 6 #define MBED_LOCALFILESYSTEM_H
antbig 0:ad97421fb1fb 7
antbig 0:ad97421fb1fb 8 #include "FileSystemLike.h"
antbig 0:ad97421fb1fb 9
antbig 0:ad97421fb1fb 10 namespace mbed {
antbig 0:ad97421fb1fb 11
antbig 0:ad97421fb1fb 12 FILEHANDLE local_file_open(const char* name, int flags);
antbig 0:ad97421fb1fb 13
antbig 0:ad97421fb1fb 14 class LocalFileHandle : public FileHandle {
antbig 0:ad97421fb1fb 15
antbig 0:ad97421fb1fb 16 public:
antbig 0:ad97421fb1fb 17 LocalFileHandle(FILEHANDLE fh);
antbig 0:ad97421fb1fb 18
antbig 0:ad97421fb1fb 19 virtual int close();
antbig 0:ad97421fb1fb 20
antbig 0:ad97421fb1fb 21 virtual ssize_t write(const void *buffer, size_t length);
antbig 0:ad97421fb1fb 22
antbig 0:ad97421fb1fb 23 virtual ssize_t read(void *buffer, size_t length);
antbig 0:ad97421fb1fb 24
antbig 0:ad97421fb1fb 25 virtual int isatty();
antbig 0:ad97421fb1fb 26
antbig 0:ad97421fb1fb 27 virtual off_t lseek(off_t position, int whence);
antbig 0:ad97421fb1fb 28
antbig 0:ad97421fb1fb 29 virtual int fsync();
antbig 0:ad97421fb1fb 30
antbig 0:ad97421fb1fb 31 virtual off_t flen();
antbig 0:ad97421fb1fb 32
antbig 0:ad97421fb1fb 33 protected:
antbig 0:ad97421fb1fb 34 FILEHANDLE _fh;
antbig 0:ad97421fb1fb 35 int pos;
antbig 0:ad97421fb1fb 36 };
antbig 0:ad97421fb1fb 37
antbig 0:ad97421fb1fb 38 /* Class: LocalFileSystem
antbig 0:ad97421fb1fb 39 * A filesystem for accessing the local mbed Microcontroller USB disk drive
antbig 0:ad97421fb1fb 40 *
antbig 0:ad97421fb1fb 41 * This allows programs to read and write files on the same disk drive that is used to program the
antbig 0:ad97421fb1fb 42 * mbed Microcontroller. Once created, the standard C file access functions are used to open,
antbig 0:ad97421fb1fb 43 * read and write files.
antbig 0:ad97421fb1fb 44 *
antbig 0:ad97421fb1fb 45 * Example:
antbig 0:ad97421fb1fb 46 * > #include "mbed.h"
antbig 0:ad97421fb1fb 47 * >
antbig 0:ad97421fb1fb 48 * > LocalFileSystem local("local"); // Create the local filesystem under the name "local"
antbig 0:ad97421fb1fb 49 * >
antbig 0:ad97421fb1fb 50 * > int main() {
antbig 0:ad97421fb1fb 51 * > FILE *fp = fopen("/local/out.txt", "w"); // Open "out.txt" on the local file system for writing
antbig 0:ad97421fb1fb 52 * > fprintf(fp, "Hello World!");
antbig 0:ad97421fb1fb 53 * > fclose(fp);
antbig 0:ad97421fb1fb 54 * > remove("/local/out.txt"); // Removes the file "out.txt" from the local file system
antbig 0:ad97421fb1fb 55 * >
antbig 0:ad97421fb1fb 56 * > DIR *d = opendir("/local"); // Opens the root directory of the local file system
antbig 0:ad97421fb1fb 57 * > struct dirent *p;
antbig 0:ad97421fb1fb 58 * > while((p = readdir(d)) != NULL) { // Print the names of the files in the local file system
antbig 0:ad97421fb1fb 59 * > printf("%s\n", p->d_name); // to stdout.
antbig 0:ad97421fb1fb 60 * > }
antbig 0:ad97421fb1fb 61 * > closedir(d);
antbig 0:ad97421fb1fb 62 * > }
antbig 0:ad97421fb1fb 63 *
antbig 0:ad97421fb1fb 64 * Implementation Notes:
antbig 0:ad97421fb1fb 65 * If the microcontroller program makes an access to the local drive, it will be marked as "removed"
antbig 0:ad97421fb1fb 66 * on the Host computer. This means it is no longer accessible from the Host Computer.
antbig 0:ad97421fb1fb 67 *
antbig 0:ad97421fb1fb 68 * The drive will only re-appear when the microcontroller program exists. Note that if the program does
antbig 0:ad97421fb1fb 69 * not exit, you will need to hold down reset on the mbed Microcontroller to be able to see the drive again!
antbig 0:ad97421fb1fb 70 */
antbig 0:ad97421fb1fb 71 class LocalFileSystem : public FileSystemLike {
antbig 0:ad97421fb1fb 72
antbig 0:ad97421fb1fb 73 public:
antbig 0:ad97421fb1fb 74
antbig 0:ad97421fb1fb 75 LocalFileSystem(const char* n) : FileSystemLike(n) {
antbig 0:ad97421fb1fb 76
antbig 0:ad97421fb1fb 77 }
antbig 0:ad97421fb1fb 78
antbig 0:ad97421fb1fb 79 virtual FileHandle *open(const char* name, int flags);
antbig 0:ad97421fb1fb 80 virtual int remove(const char *filename);
antbig 0:ad97421fb1fb 81 virtual DirHandle *opendir(const char *name);
antbig 0:ad97421fb1fb 82 };
antbig 0:ad97421fb1fb 83
antbig 0:ad97421fb1fb 84 } // namespace mbed
antbig 0:ad97421fb1fb 85
antbig 0:ad97421fb1fb 86 #endif