add MemFileSystem::dump and MemFileSystem::load
Fork of FATFileSystem by
MemFileSystem.h@5:3a1206d2cae6, 2015-04-01 (annotated)
- Committer:
- mzta
- Date:
- Wed Apr 01 16:26:32 2015 +0000
- Revision:
- 5:3a1206d2cae6
- Parent:
- 3:e960e2b81a3c
add void MemFilesystem::dump(FILE *fp); add void MemFilesystem::load(FILE *fp);
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" |
mzta | 5:3a1206d2cae6 | 10 | #include "SDFileSystem.h" |
mzta | 5:3a1206d2cae6 | 11 | |
mzta | 5:3a1206d2cae6 | 12 | #define NUM_OF_SECTORS 2000 |
mzta | 5:3a1206d2cae6 | 13 | #define SECTOR_SIZE 512 |
screamer | 3:e960e2b81a3c | 14 | |
screamer | 3:e960e2b81a3c | 15 | namespace mbed |
screamer | 3:e960e2b81a3c | 16 | { |
screamer | 3:e960e2b81a3c | 17 | |
screamer | 3:e960e2b81a3c | 18 | class MemFileSystem : public FATFileSystem |
screamer | 3:e960e2b81a3c | 19 | { |
screamer | 3:e960e2b81a3c | 20 | public: |
screamer | 3:e960e2b81a3c | 21 | |
screamer | 3:e960e2b81a3c | 22 | // 2000 sectors, each 512 bytes (malloced as required) |
mzta | 5:3a1206d2cae6 | 23 | char *sectors[NUM_OF_SECTORS]; |
screamer | 3:e960e2b81a3c | 24 | |
screamer | 3:e960e2b81a3c | 25 | MemFileSystem(const char* name) : FATFileSystem(name) { |
screamer | 3:e960e2b81a3c | 26 | memset(sectors, 0, sizeof(sectors)); |
screamer | 3:e960e2b81a3c | 27 | } |
screamer | 3:e960e2b81a3c | 28 | |
screamer | 3:e960e2b81a3c | 29 | virtual ~MemFileSystem() { |
mzta | 5:3a1206d2cae6 | 30 | for(int i = 0; i < NUM_OF_SECTORS; i++) { |
screamer | 3:e960e2b81a3c | 31 | if(sectors[i]) { |
screamer | 3:e960e2b81a3c | 32 | free(sectors[i]); |
screamer | 3:e960e2b81a3c | 33 | } |
screamer | 3:e960e2b81a3c | 34 | } |
screamer | 3:e960e2b81a3c | 35 | } |
mzta | 5:3a1206d2cae6 | 36 | |
screamer | 3:e960e2b81a3c | 37 | // read a sector in to the buffer, return 0 if ok |
mzta | 5:3a1206d2cae6 | 38 | virtual int disk_read(uint8_t *buffer, uint64_t sector, uint8_t count) { |
screamer | 3:e960e2b81a3c | 39 | if(sectors[sector] == 0) { |
screamer | 3:e960e2b81a3c | 40 | // nothing allocated means sector is empty |
mzta | 5:3a1206d2cae6 | 41 | memset(buffer, 0, SECTOR_SIZE); |
screamer | 3:e960e2b81a3c | 42 | } else { |
mzta | 5:3a1206d2cae6 | 43 | memcpy(buffer, sectors[sector], SECTOR_SIZE); |
screamer | 3:e960e2b81a3c | 44 | } |
screamer | 3:e960e2b81a3c | 45 | return 0; |
screamer | 3:e960e2b81a3c | 46 | } |
screamer | 3:e960e2b81a3c | 47 | |
screamer | 3:e960e2b81a3c | 48 | // write a sector from the buffer, return 0 if ok |
mzta | 5:3a1206d2cae6 | 49 | virtual int disk_write(const uint8_t *buffer, uint64_t sector, uint8_t count) { |
screamer | 3:e960e2b81a3c | 50 | // if buffer is zero deallocate sector |
mzta | 5:3a1206d2cae6 | 51 | char zero[SECTOR_SIZE]; |
mzta | 5:3a1206d2cae6 | 52 | memset(zero, 0, SECTOR_SIZE); |
mzta | 5:3a1206d2cae6 | 53 | if(memcmp(zero, buffer, SECTOR_SIZE)==0) { |
screamer | 3:e960e2b81a3c | 54 | if(sectors[sector] != 0) { |
screamer | 3:e960e2b81a3c | 55 | free(sectors[sector]); |
screamer | 3:e960e2b81a3c | 56 | sectors[sector] = 0; |
screamer | 3:e960e2b81a3c | 57 | } |
screamer | 3:e960e2b81a3c | 58 | return 0; |
screamer | 3:e960e2b81a3c | 59 | } |
screamer | 3:e960e2b81a3c | 60 | // else allocate a sector if needed, and write |
screamer | 3:e960e2b81a3c | 61 | if(sectors[sector] == 0) { |
mzta | 5:3a1206d2cae6 | 62 | char *sec = (char*)malloc(SECTOR_SIZE); |
screamer | 3:e960e2b81a3c | 63 | if(sec==0) { |
screamer | 3:e960e2b81a3c | 64 | return 1; // out of memory |
screamer | 3:e960e2b81a3c | 65 | } |
screamer | 3:e960e2b81a3c | 66 | sectors[sector] = sec; |
screamer | 3:e960e2b81a3c | 67 | } |
mzta | 5:3a1206d2cae6 | 68 | memcpy(sectors[sector], buffer, SECTOR_SIZE); |
screamer | 3:e960e2b81a3c | 69 | return 0; |
screamer | 3:e960e2b81a3c | 70 | } |
screamer | 3:e960e2b81a3c | 71 | |
screamer | 3:e960e2b81a3c | 72 | // return the number of sectors |
mzta | 5:3a1206d2cae6 | 73 | virtual uint64_t disk_sectors() { |
screamer | 3:e960e2b81a3c | 74 | return sizeof(sectors)/sizeof(sectors[0]); |
screamer | 3:e960e2b81a3c | 75 | } |
mzta | 5:3a1206d2cae6 | 76 | |
mzta | 5:3a1206d2cae6 | 77 | void dump(FILE *fp) { |
mzta | 5:3a1206d2cae6 | 78 | for (int i = 0; i < NUM_OF_SECTORS; i++) { |
mzta | 5:3a1206d2cae6 | 79 | fwrite(§ors[i], sizeof(int), 1, fp); |
mzta | 5:3a1206d2cae6 | 80 | if (sectors[i] != 0) { |
mzta | 5:3a1206d2cae6 | 81 | fwrite(sectors[i], sizeof(char), SECTOR_SIZE, fp); |
mzta | 5:3a1206d2cae6 | 82 | } |
mzta | 5:3a1206d2cae6 | 83 | } |
mzta | 5:3a1206d2cae6 | 84 | } |
mzta | 5:3a1206d2cae6 | 85 | |
mzta | 5:3a1206d2cae6 | 86 | void load(FILE *fp) { |
mzta | 5:3a1206d2cae6 | 87 | int sec_info = 0; |
mzta | 5:3a1206d2cae6 | 88 | for (int i = 0; i < NUM_OF_SECTORS; i++) { |
mzta | 5:3a1206d2cae6 | 89 | fread(&sec_info, sizeof(int), 1, fp); |
mzta | 5:3a1206d2cae6 | 90 | if (sec_info != 0) { |
mzta | 5:3a1206d2cae6 | 91 | char *sec = (char *)malloc(SECTOR_SIZE); |
mzta | 5:3a1206d2cae6 | 92 | fread(sec, sizeof(char), SECTOR_SIZE, fp); |
mzta | 5:3a1206d2cae6 | 93 | sectors[i] = sec; |
mzta | 5:3a1206d2cae6 | 94 | } |
mzta | 5:3a1206d2cae6 | 95 | } |
mzta | 5:3a1206d2cae6 | 96 | } |
screamer | 3:e960e2b81a3c | 97 | }; |
screamer | 3:e960e2b81a3c | 98 | } |
screamer | 3:e960e2b81a3c | 99 | |
screamer | 3:e960e2b81a3c | 100 | #endif |