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Dependencies:   NetServices FatFileSystem csv_parser mbed MQTTClient RF12B DNSResolver SDFileSystem

FatFileSystem/FATFileHandle.cpp@0:a29a0225f203, 2012-04-02 (annotated)

Committer:
SomeRandomBloke
Date:
Mon Apr 02 22:05:20 2012 +0000
Revision:
0:a29a0225f203
Initial version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
SomeRandomBloke 0:a29a0225f203 1 /* mbed Microcontroller Library - FATFileHandle
SomeRandomBloke 0:a29a0225f203 2 * Copyright (c) 2008, sford
SomeRandomBloke 0:a29a0225f203 3 */
SomeRandomBloke 0:a29a0225f203 4
SomeRandomBloke 0:a29a0225f203 5 #include "FATFileHandle.h"
SomeRandomBloke 0:a29a0225f203 6
SomeRandomBloke 0:a29a0225f203 7 #include <stdio.h>
SomeRandomBloke 0:a29a0225f203 8 #include <stdlib.h>
SomeRandomBloke 0:a29a0225f203 9 #include "ff.h"
SomeRandomBloke 0:a29a0225f203 10 #include "FATFileSystem.h"
SomeRandomBloke 0:a29a0225f203 11
SomeRandomBloke 0:a29a0225f203 12 namespace mbed {
SomeRandomBloke 0:a29a0225f203 13
SomeRandomBloke 0:a29a0225f203 14 #if FFSDEBUG_ENABLED
SomeRandomBloke 0:a29a0225f203 15 static const char *FR_ERRORS[] = {
SomeRandomBloke 0:a29a0225f203 16 "FR_OK = 0",
SomeRandomBloke 0:a29a0225f203 17 "FR_NOT_READY",
SomeRandomBloke 0:a29a0225f203 18 "FR_NO_FILE",
SomeRandomBloke 0:a29a0225f203 19 "FR_NO_PATH",
SomeRandomBloke 0:a29a0225f203 20 "FR_INVALID_NAME",
SomeRandomBloke 0:a29a0225f203 21 "FR_INVALID_DRIVE",
SomeRandomBloke 0:a29a0225f203 22 "FR_DENIED",
SomeRandomBloke 0:a29a0225f203 23 "FR_EXIST",
SomeRandomBloke 0:a29a0225f203 24 "FR_RW_ERROR",
SomeRandomBloke 0:a29a0225f203 25 "FR_WRITE_PROTECTED",
SomeRandomBloke 0:a29a0225f203 26 "FR_NOT_ENABLED",
SomeRandomBloke 0:a29a0225f203 27 "FR_NO_FILESYSTEM",
SomeRandomBloke 0:a29a0225f203 28 "FR_INVALID_OBJECT",
SomeRandomBloke 0:a29a0225f203 29 "FR_MKFS_ABORTED"
SomeRandomBloke 0:a29a0225f203 30 };
SomeRandomBloke 0:a29a0225f203 31 #endif
SomeRandomBloke 0:a29a0225f203 32
SomeRandomBloke 0:a29a0225f203 33 FATFileHandle::FATFileHandle(FIL fh) {
SomeRandomBloke 0:a29a0225f203 34 _fh = fh;
SomeRandomBloke 0:a29a0225f203 35 }
SomeRandomBloke 0:a29a0225f203 36
SomeRandomBloke 0:a29a0225f203 37 int FATFileHandle::close() {
SomeRandomBloke 0:a29a0225f203 38 FFSDEBUG("close\n");
SomeRandomBloke 0:a29a0225f203 39 int retval = f_close(&_fh);
SomeRandomBloke 0:a29a0225f203 40 delete this;
SomeRandomBloke 0:a29a0225f203 41 return retval;
SomeRandomBloke 0:a29a0225f203 42 }
SomeRandomBloke 0:a29a0225f203 43
SomeRandomBloke 0:a29a0225f203 44 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
SomeRandomBloke 0:a29a0225f203 45 FFSDEBUG("write(%d)\n", length);
SomeRandomBloke 0:a29a0225f203 46 UINT n;
SomeRandomBloke 0:a29a0225f203 47 FRESULT res = f_write(&_fh, buffer, length, &n);
SomeRandomBloke 0:a29a0225f203 48 if(res) {
SomeRandomBloke 0:a29a0225f203 49 FFSDEBUG("f_write() failed (%d, %s)", res, FR_ERRORS[res]);
SomeRandomBloke 0:a29a0225f203 50 return -1;
SomeRandomBloke 0:a29a0225f203 51 }
SomeRandomBloke 0:a29a0225f203 52 return n;
SomeRandomBloke 0:a29a0225f203 53 }
SomeRandomBloke 0:a29a0225f203 54
SomeRandomBloke 0:a29a0225f203 55 ssize_t FATFileHandle::read(void* buffer, size_t length) {
SomeRandomBloke 0:a29a0225f203 56 FFSDEBUG("read(%d)\n", length);
SomeRandomBloke 0:a29a0225f203 57 UINT n;
SomeRandomBloke 0:a29a0225f203 58 FRESULT res = f_read(&_fh, buffer, length, &n);
SomeRandomBloke 0:a29a0225f203 59 if(res) {
SomeRandomBloke 0:a29a0225f203 60 FFSDEBUG("f_read() failed (%d, %s)\n", res, FR_ERRORS[res]);
SomeRandomBloke 0:a29a0225f203 61 return -1;
SomeRandomBloke 0:a29a0225f203 62 }
SomeRandomBloke 0:a29a0225f203 63 return n;
SomeRandomBloke 0:a29a0225f203 64 }
SomeRandomBloke 0:a29a0225f203 65
SomeRandomBloke 0:a29a0225f203 66 int FATFileHandle::isatty() {
SomeRandomBloke 0:a29a0225f203 67 return 0;
SomeRandomBloke 0:a29a0225f203 68 }
SomeRandomBloke 0:a29a0225f203 69
SomeRandomBloke 0:a29a0225f203 70 off_t FATFileHandle::lseek(off_t position, int whence) {
SomeRandomBloke 0:a29a0225f203 71 FFSDEBUG("lseek(%i,%i)\n",position,whence);
SomeRandomBloke 0:a29a0225f203 72 if(whence == SEEK_END) {
SomeRandomBloke 0:a29a0225f203 73 position += _fh.fsize;
SomeRandomBloke 0:a29a0225f203 74 } else if(whence==SEEK_CUR) {
SomeRandomBloke 0:a29a0225f203 75 position += _fh.fptr;
SomeRandomBloke 0:a29a0225f203 76 }
SomeRandomBloke 0:a29a0225f203 77 FRESULT res = f_lseek(&_fh, position);
SomeRandomBloke 0:a29a0225f203 78 if(res) {
SomeRandomBloke 0:a29a0225f203 79 FFSDEBUG("lseek failed (%d, %s)\n", res, FR_ERRORS[res]);
SomeRandomBloke 0:a29a0225f203 80 return -1;
SomeRandomBloke 0:a29a0225f203 81 } else {
SomeRandomBloke 0:a29a0225f203 82 FFSDEBUG("lseek OK, returning %i\n", _fh.fptr);
SomeRandomBloke 0:a29a0225f203 83 return _fh.fptr;
SomeRandomBloke 0:a29a0225f203 84 }
SomeRandomBloke 0:a29a0225f203 85 }
SomeRandomBloke 0:a29a0225f203 86
SomeRandomBloke 0:a29a0225f203 87 int FATFileHandle::fsync() {
SomeRandomBloke 0:a29a0225f203 88 FFSDEBUG("fsync()\n");
SomeRandomBloke 0:a29a0225f203 89 FRESULT res = f_sync(&_fh);
SomeRandomBloke 0:a29a0225f203 90 if (res) {
SomeRandomBloke 0:a29a0225f203 91 FFSDEBUG("f_sync() failed (%d, %s)\n", res, FR_ERRORS[res]);
SomeRandomBloke 0:a29a0225f203 92 return -1;
SomeRandomBloke 0:a29a0225f203 93 }
SomeRandomBloke 0:a29a0225f203 94 return 0;
SomeRandomBloke 0:a29a0225f203 95 }
SomeRandomBloke 0:a29a0225f203 96
SomeRandomBloke 0:a29a0225f203 97 off_t FATFileHandle::flen() {
SomeRandomBloke 0:a29a0225f203 98 FFSDEBUG("flen\n");
SomeRandomBloke 0:a29a0225f203 99 return _fh.fsize;
SomeRandomBloke 0:a29a0225f203 100 }
SomeRandomBloke 0:a29a0225f203 101
SomeRandomBloke 0:a29a0225f203 102 } // namespace mbed