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
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?
User | Revision | Line number | New 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 |