Vergil Cola / SDFileSystem2

A fork of the original SDFileSystem, added only stat() for getting file information.

Dependents:   FRDM_K64F_IOT

Added code to the original SDFileSystem to export the stat() command. It would now be possible to get the FILEINFO struct of a directory entry to get information such as file size, etc.

SDFileSystem2 usage

#include "SDFileSystem.h"
SDFileSystem sd(p5,p6,p7,p8,"sd"); // mosi, miso, sck, cs 

static void cmd_ls(Stream * chp, int argc, char * argv[])
{
   DIR * dp;
   struct dirent * dirp;
   FILINFO fileInfo;
   char dirroot[256];
   
   if (argc >= 1)
       sprintf(dirroot, "/sd/%s", argv[0]);
   else
       sprintf(dirroot, "/sd");
   
   chp->printf("Listing directory [%s]\r\n", dirroot);
   
   dp = opendir(dirroot);			
   while((dirp = readdir(dp)) != NULL)
   {
       if (sd.stat(dirp->d_name, &fileInfo) == 0)
       {
           if (fileInfo.fattrib & AM_DIR )
                   chp->printf("<DIR>\t\t");
           else
                   chp->printf("%ld\t\t", fileInfo.fsize);
       }
       chp->printf("%s\r\n", dirp->d_name);
   }
   closedir(dp);
}

FATFileSystem/FATFileHandle.cpp@0:572d27f56fcd, 2015-04-28 (annotated)

Committer:
vpcola
Date:
Tue Apr 28 16:55:30 2015 +0000
Revision:
0:572d27f56fcd
Added stat() to get file information

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vpcola 0:572d27f56fcd 1 /* mbed Microcontroller Library
vpcola 0:572d27f56fcd 2 * Copyright (c) 2006-2012 ARM Limited
vpcola 0:572d27f56fcd 3 *
vpcola 0:572d27f56fcd 4 * Permission is hereby granted, free of charge, to any person obtaining a copy
vpcola 0:572d27f56fcd 5 * of this software and associated documentation files (the "Software"), to deal
vpcola 0:572d27f56fcd 6 * in the Software without restriction, including without limitation the rights
vpcola 0:572d27f56fcd 7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
vpcola 0:572d27f56fcd 8 * copies of the Software, and to permit persons to whom the Software is
vpcola 0:572d27f56fcd 9 * furnished to do so, subject to the following conditions:
vpcola 0:572d27f56fcd 10 *
vpcola 0:572d27f56fcd 11 * The above copyright notice and this permission notice shall be included in
vpcola 0:572d27f56fcd 12 * all copies or substantial portions of the Software.
vpcola 0:572d27f56fcd 13 *
vpcola 0:572d27f56fcd 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
vpcola 0:572d27f56fcd 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
vpcola 0:572d27f56fcd 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
vpcola 0:572d27f56fcd 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
vpcola 0:572d27f56fcd 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
vpcola 0:572d27f56fcd 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
vpcola 0:572d27f56fcd 20 * SOFTWARE.
vpcola 0:572d27f56fcd 21 */
vpcola 0:572d27f56fcd 22 #include "ff.h"
vpcola 0:572d27f56fcd 23 #include "ffconf.h"
vpcola 0:572d27f56fcd 24 #include "mbed_debug.h"
vpcola 0:572d27f56fcd 25
vpcola 0:572d27f56fcd 26 #include "FATFileHandle.h"
vpcola 0:572d27f56fcd 27
vpcola 0:572d27f56fcd 28 FATFileHandle::FATFileHandle(FIL fh) {
vpcola 0:572d27f56fcd 29 _fh = fh;
vpcola 0:572d27f56fcd 30 }
vpcola 0:572d27f56fcd 31
vpcola 0:572d27f56fcd 32 int FATFileHandle::close() {
vpcola 0:572d27f56fcd 33 int retval = f_close(&_fh);
vpcola 0:572d27f56fcd 34 delete this;
vpcola 0:572d27f56fcd 35 return retval;
vpcola 0:572d27f56fcd 36 }
vpcola 0:572d27f56fcd 37
vpcola 0:572d27f56fcd 38 ssize_t FATFileHandle::write(const void* buffer, size_t length) {
vpcola 0:572d27f56fcd 39 UINT n;
vpcola 0:572d27f56fcd 40 FRESULT res = f_write(&_fh, buffer, length, &n);
vpcola 0:572d27f56fcd 41 if (res) {
vpcola 0:572d27f56fcd 42 debug_if(FFS_DBG, "f_write() failed: %d", res);
vpcola 0:572d27f56fcd 43 return -1;
vpcola 0:572d27f56fcd 44 }
vpcola 0:572d27f56fcd 45 return n;
vpcola 0:572d27f56fcd 46 }
vpcola 0:572d27f56fcd 47
vpcola 0:572d27f56fcd 48 ssize_t FATFileHandle::read(void* buffer, size_t length) {
vpcola 0:572d27f56fcd 49 debug_if(FFS_DBG, "read(%d)\n", length);
vpcola 0:572d27f56fcd 50 UINT n;
vpcola 0:572d27f56fcd 51 FRESULT res = f_read(&_fh, buffer, length, &n);
vpcola 0:572d27f56fcd 52 if (res) {
vpcola 0:572d27f56fcd 53 debug_if(FFS_DBG, "f_read() failed: %d\n", res);
vpcola 0:572d27f56fcd 54 return -1;
vpcola 0:572d27f56fcd 55 }
vpcola 0:572d27f56fcd 56 return n;
vpcola 0:572d27f56fcd 57 }
vpcola 0:572d27f56fcd 58
vpcola 0:572d27f56fcd 59 int FATFileHandle::isatty() {
vpcola 0:572d27f56fcd 60 return 0;
vpcola 0:572d27f56fcd 61 }
vpcola 0:572d27f56fcd 62
vpcola 0:572d27f56fcd 63 off_t FATFileHandle::lseek(off_t position, int whence) {
vpcola 0:572d27f56fcd 64 if (whence == SEEK_END) {
vpcola 0:572d27f56fcd 65 position += _fh.fsize;
vpcola 0:572d27f56fcd 66 } else if(whence==SEEK_CUR) {
vpcola 0:572d27f56fcd 67 position += _fh.fptr;
vpcola 0:572d27f56fcd 68 }
vpcola 0:572d27f56fcd 69 FRESULT res = f_lseek(&_fh, position);
vpcola 0:572d27f56fcd 70 if (res) {
vpcola 0:572d27f56fcd 71 debug_if(FFS_DBG, "lseek failed: %d\n", res);
vpcola 0:572d27f56fcd 72 return -1;
vpcola 0:572d27f56fcd 73 } else {
vpcola 0:572d27f56fcd 74 debug_if(FFS_DBG, "lseek OK, returning %i\n", _fh.fptr);
vpcola 0:572d27f56fcd 75 return _fh.fptr;
vpcola 0:572d27f56fcd 76 }
vpcola 0:572d27f56fcd 77 }
vpcola 0:572d27f56fcd 78
vpcola 0:572d27f56fcd 79 int FATFileHandle::fsync() {
vpcola 0:572d27f56fcd 80 FRESULT res = f_sync(&_fh);
vpcola 0:572d27f56fcd 81 if (res) {
vpcola 0:572d27f56fcd 82 debug_if(FFS_DBG, "f_sync() failed: %d\n", res);
vpcola 0:572d27f56fcd 83 return -1;
vpcola 0:572d27f56fcd 84 }
vpcola 0:572d27f56fcd 85 return 0;
vpcola 0:572d27f56fcd 86 }
vpcola 0:572d27f56fcd 87
vpcola 0:572d27f56fcd 88 off_t FATFileHandle::flen() {
vpcola 0:572d27f56fcd 89 return _fh.fsize;
vpcola 0:572d27f56fcd 90 }