S K UCI / FATFileSystemWithFilinfo

Fork of FATFileSystem that exposes FILINFO in the FATDirHandle. This allows obtaining true file sizes and testing whether a dir pointer is a directory or a file.

Dependents:   SDFileSystemNoStall

Fork of FATFileSystem by mbed official

MemFileSystem.h@6:7a3c53d25d96, 2014-10-30 (annotated)

Committer:
uci1
Date:
Thu Oct 30 07:01:15 2014 +0000
Revision:
6:7a3c53d25d96
Parent:
3:e960e2b81a3c 
Revert the fat file system back to that from 17 Mar 2014 so that it works with the SD card library, and add again the exposing of FILINFO to FATDirHandle

Who changed what in which revision?

UserRevisionLine numberNew contents of line
screamer 3:e960e2b81a3c 1 /* mbed Microcontroller Library - MemFileSystem
screamer 3:e960e2b81a3c 2 * Copyright (c) 2008, sford
screamer 3:e960e2b81a3c 3 */
screamer 3:e960e2b81a3c 4
screamer 3:e960e2b81a3c 5
screamer 3:e960e2b81a3c 6 #ifndef MBED_MEMFILESYSTEM_H
screamer 3:e960e2b81a3c 7 #define MBED_MEMFILESYSTEM_H
screamer 3:e960e2b81a3c 8
screamer 3:e960e2b81a3c 9 #include "FATFileSystem.h"
screamer 3:e960e2b81a3c 10
screamer 3:e960e2b81a3c 11 namespace mbed
screamer 3:e960e2b81a3c 12 {
screamer 3:e960e2b81a3c 13
screamer 3:e960e2b81a3c 14 class MemFileSystem : public FATFileSystem
screamer 3:e960e2b81a3c 15 {
screamer 3:e960e2b81a3c 16 public:
screamer 3:e960e2b81a3c 17
screamer 3:e960e2b81a3c 18 // 2000 sectors, each 512 bytes (malloced as required)
screamer 3:e960e2b81a3c 19 char *sectors[2000];
screamer 3:e960e2b81a3c 20
screamer 3:e960e2b81a3c 21 MemFileSystem(const char* name) : FATFileSystem(name) {
screamer 3:e960e2b81a3c 22 memset(sectors, 0, sizeof(sectors));
screamer 3:e960e2b81a3c 23 }
screamer 3:e960e2b81a3c 24
screamer 3:e960e2b81a3c 25 virtual ~MemFileSystem() {
screamer 3:e960e2b81a3c 26 for(int i = 0; i < 2000; i++) {
screamer 3:e960e2b81a3c 27 if(sectors[i]) {
screamer 3:e960e2b81a3c 28 free(sectors[i]);
screamer 3:e960e2b81a3c 29 }
screamer 3:e960e2b81a3c 30 }
screamer 3:e960e2b81a3c 31 }
screamer 3:e960e2b81a3c 32
screamer 3:e960e2b81a3c 33 // read a sector in to the buffer, return 0 if ok
screamer 3:e960e2b81a3c 34 virtual int disk_read(char *buffer, int sector) {
screamer 3:e960e2b81a3c 35 if(sectors[sector] == 0) {
screamer 3:e960e2b81a3c 36 // nothing allocated means sector is empty
screamer 3:e960e2b81a3c 37 memset(buffer, 0, 512);
screamer 3:e960e2b81a3c 38 } else {
screamer 3:e960e2b81a3c 39 memcpy(buffer, sectors[sector], 512);
screamer 3:e960e2b81a3c 40 }
screamer 3:e960e2b81a3c 41 return 0;
screamer 3:e960e2b81a3c 42 }
screamer 3:e960e2b81a3c 43
screamer 3:e960e2b81a3c 44 // write a sector from the buffer, return 0 if ok
screamer 3:e960e2b81a3c 45 virtual int disk_write(const char *buffer, int sector) {
screamer 3:e960e2b81a3c 46 // if buffer is zero deallocate sector
screamer 3:e960e2b81a3c 47 char zero[512];
screamer 3:e960e2b81a3c 48 memset(zero, 0, 512);
screamer 3:e960e2b81a3c 49 if(memcmp(zero, buffer, 512)==0) {
screamer 3:e960e2b81a3c 50 if(sectors[sector] != 0) {
screamer 3:e960e2b81a3c 51 free(sectors[sector]);
screamer 3:e960e2b81a3c 52 sectors[sector] = 0;
screamer 3:e960e2b81a3c 53 }
screamer 3:e960e2b81a3c 54 return 0;
screamer 3:e960e2b81a3c 55 }
screamer 3:e960e2b81a3c 56 // else allocate a sector if needed, and write
screamer 3:e960e2b81a3c 57 if(sectors[sector] == 0) {
screamer 3:e960e2b81a3c 58 char *sec = (char*)malloc(512);
screamer 3:e960e2b81a3c 59 if(sec==0) {
screamer 3:e960e2b81a3c 60 return 1; // out of memory
screamer 3:e960e2b81a3c 61 }
screamer 3:e960e2b81a3c 62 sectors[sector] = sec;
screamer 3:e960e2b81a3c 63 }
screamer 3:e960e2b81a3c 64 memcpy(sectors[sector], buffer, 512);
screamer 3:e960e2b81a3c 65 return 0;
screamer 3:e960e2b81a3c 66 }
screamer 3:e960e2b81a3c 67
screamer 3:e960e2b81a3c 68 // return the number of sectors
screamer 3:e960e2b81a3c 69 virtual int disk_sectors() {
screamer 3:e960e2b81a3c 70 return sizeof(sectors)/sizeof(sectors[0]);
screamer 3:e960e2b81a3c 71 }
screamer 3:e960e2b81a3c 72
screamer 3:e960e2b81a3c 73 };
screamer 3:e960e2b81a3c 74
screamer 3:e960e2b81a3c 75 }
screamer 3:e960e2b81a3c 76
screamer 3:e960e2b81a3c 77 #endif