Simon Ford
/
fat
ff.c@1:208803a150b2, 2012-01-12 (annotated)
- Committer:
- simon
- Date:
- Thu Jan 12 12:59:33 2012 +0000
- Revision:
- 1:208803a150b2
- Parent:
- 0:560a6744936c
fix on line 61 of diskio, sector -> s
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
simon | 0:560a6744936c | 1 | /*----------------------------------------------------------------------------/ |
simon | 0:560a6744936c | 2 | / FatFs - FAT file system module R0.06 (C)ChaN, 2008 |
simon | 0:560a6744936c | 3 | /-----------------------------------------------------------------------------/ |
simon | 0:560a6744936c | 4 | / The FatFs module is an experimenal project to implement FAT file system to |
simon | 0:560a6744936c | 5 | / cheap microcontrollers. This is a free software and is opened for education, |
simon | 0:560a6744936c | 6 | / research and development under license policy of following trems. |
simon | 0:560a6744936c | 7 | / |
simon | 0:560a6744936c | 8 | / Copyright (C) 2008, ChaN, all right reserved. |
simon | 0:560a6744936c | 9 | / |
simon | 0:560a6744936c | 10 | / * The FatFs module is a free software and there is no warranty. |
simon | 0:560a6744936c | 11 | / * You can use, modify and/or redistribute it for personal, non-profit or |
simon | 0:560a6744936c | 12 | / commercial use without restriction under your responsibility. |
simon | 0:560a6744936c | 13 | / * Redistributions of source code must retain the above copyright notice. |
simon | 0:560a6744936c | 14 | / |
simon | 0:560a6744936c | 15 | /-----------------------------------------------------------------------------/ |
simon | 0:560a6744936c | 16 | / Feb 26,'06 R0.00 Prototype. |
simon | 0:560a6744936c | 17 | / |
simon | 0:560a6744936c | 18 | / Apr 29,'06 R0.01 First stable version. |
simon | 0:560a6744936c | 19 | / |
simon | 0:560a6744936c | 20 | / Jun 01,'06 R0.02 Added FAT12 support. |
simon | 0:560a6744936c | 21 | / Removed unbuffered mode. |
simon | 0:560a6744936c | 22 | / Fixed a problem on small (<32M) patition. |
simon | 0:560a6744936c | 23 | / Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM). |
simon | 0:560a6744936c | 24 | / |
simon | 0:560a6744936c | 25 | / Sep 22,'06 R0.03 Added f_rename(). |
simon | 0:560a6744936c | 26 | / Changed option _FS_MINIMUM to _FS_MINIMIZE. |
simon | 0:560a6744936c | 27 | / Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast. |
simon | 0:560a6744936c | 28 | / Fixed f_mkdir() creates incorrect directory on FAT32. |
simon | 0:560a6744936c | 29 | / |
simon | 0:560a6744936c | 30 | / Feb 04,'07 R0.04 Supported multiple drive system. |
simon | 0:560a6744936c | 31 | / Changed some interfaces for multiple drive system. |
simon | 0:560a6744936c | 32 | / Changed f_mountdrv() to f_mount(). |
simon | 0:560a6744936c | 33 | / Added f_mkfs(). |
simon | 0:560a6744936c | 34 | / Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive. |
simon | 0:560a6744936c | 35 | / Added a capability of extending file size to f_lseek(). |
simon | 0:560a6744936c | 36 | / Added minimization level 3. |
simon | 0:560a6744936c | 37 | / Fixed an endian sensitive code in f_mkfs(). |
simon | 0:560a6744936c | 38 | / May 05,'07 R0.04b Added a configuration option _USE_NTFLAG. |
simon | 0:560a6744936c | 39 | / Added FSInfo support. |
simon | 0:560a6744936c | 40 | / Fixed DBCS name can result FR_INVALID_NAME. |
simon | 0:560a6744936c | 41 | / Fixed short seek (<= csize) collapses the file object. |
simon | 0:560a6744936c | 42 | / |
simon | 0:560a6744936c | 43 | / Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs(). |
simon | 0:560a6744936c | 44 | / Fixed f_mkfs() on FAT32 creates incorrect FSInfo. |
simon | 0:560a6744936c | 45 | / Fixed f_mkdir() on FAT32 creates incorrect directory. |
simon | 0:560a6744936c | 46 | / Feb 03,'08 R0.05a Added f_truncate() and f_utime(). |
simon | 0:560a6744936c | 47 | / Fixed off by one error at FAT sub-type determination. |
simon | 0:560a6744936c | 48 | / Fixed btr in f_read() can be mistruncated. |
simon | 0:560a6744936c | 49 | / Fixed cached sector is not flushed when create and close |
simon | 0:560a6744936c | 50 | / without write. |
simon | 0:560a6744936c | 51 | / |
simon | 0:560a6744936c | 52 | / Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets(). |
simon | 0:560a6744936c | 53 | / Improved performance of f_lseek() on moving to the same |
simon | 0:560a6744936c | 54 | / or following cluster. |
simon | 0:560a6744936c | 55 | /---------------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 56 | |
simon | 0:560a6744936c | 57 | #include <string.h> |
simon | 0:560a6744936c | 58 | #include "ff.h" /* FatFs declarations */ |
simon | 0:560a6744936c | 59 | #include "diskio.h" /* Include file for user provided disk functions */ |
simon | 0:560a6744936c | 60 | |
simon | 0:560a6744936c | 61 | |
simon | 0:560a6744936c | 62 | /*-------------------------------------------------------------------------- |
simon | 0:560a6744936c | 63 | |
simon | 0:560a6744936c | 64 | Module Private Functions |
simon | 0:560a6744936c | 65 | |
simon | 0:560a6744936c | 66 | ---------------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 67 | |
simon | 0:560a6744936c | 68 | static |
simon | 0:560a6744936c | 69 | FATFS *FatFs[_DRIVES]; /* Pointer to the file system objects (logical drives) */ |
simon | 0:560a6744936c | 70 | static |
simon | 0:560a6744936c | 71 | WORD fsid; /* File system mount ID */ |
simon | 0:560a6744936c | 72 | |
simon | 0:560a6744936c | 73 | |
simon | 0:560a6744936c | 74 | |
simon | 0:560a6744936c | 75 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 76 | /* Change window offset */ |
simon | 0:560a6744936c | 77 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 78 | |
simon | 0:560a6744936c | 79 | static |
simon | 0:560a6744936c | 80 | BOOL move_window ( /* TRUE: successful, FALSE: failed */ |
simon | 0:560a6744936c | 81 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 82 | DWORD sector /* Sector number to make apperance in the fs->win[] */ |
simon | 0:560a6744936c | 83 | ) /* Move to zero only writes back dirty window */ |
simon | 0:560a6744936c | 84 | { |
simon | 0:560a6744936c | 85 | DWORD wsect; |
simon | 0:560a6744936c | 86 | |
simon | 0:560a6744936c | 87 | |
simon | 0:560a6744936c | 88 | wsect = fs->winsect; |
simon | 0:560a6744936c | 89 | if (wsect != sector) { /* Changed current window */ |
simon | 0:560a6744936c | 90 | #if !_FS_READONLY |
simon | 0:560a6744936c | 91 | BYTE n; |
simon | 0:560a6744936c | 92 | if (fs->winflag) { /* Write back dirty window if needed */ |
simon | 0:560a6744936c | 93 | if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK) |
simon | 0:560a6744936c | 94 | return FALSE; |
simon | 0:560a6744936c | 95 | fs->winflag = 0; |
simon | 0:560a6744936c | 96 | if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */ |
simon | 0:560a6744936c | 97 | for (n = fs->n_fats; n >= 2; n--) { /* Refrect the change to FAT copy */ |
simon | 0:560a6744936c | 98 | wsect += fs->sects_fat; |
simon | 0:560a6744936c | 99 | disk_write(fs->drive, fs->win, wsect, 1); |
simon | 0:560a6744936c | 100 | } |
simon | 0:560a6744936c | 101 | } |
simon | 0:560a6744936c | 102 | } |
simon | 0:560a6744936c | 103 | #endif |
simon | 0:560a6744936c | 104 | if (sector) { |
simon | 0:560a6744936c | 105 | if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK) |
simon | 0:560a6744936c | 106 | return FALSE; |
simon | 0:560a6744936c | 107 | fs->winsect = sector; |
simon | 0:560a6744936c | 108 | } |
simon | 0:560a6744936c | 109 | } |
simon | 0:560a6744936c | 110 | return TRUE; |
simon | 0:560a6744936c | 111 | } |
simon | 0:560a6744936c | 112 | |
simon | 0:560a6744936c | 113 | |
simon | 0:560a6744936c | 114 | |
simon | 0:560a6744936c | 115 | |
simon | 0:560a6744936c | 116 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 117 | /* Clean-up cached data */ |
simon | 0:560a6744936c | 118 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 119 | |
simon | 0:560a6744936c | 120 | #if !_FS_READONLY |
simon | 0:560a6744936c | 121 | static |
simon | 0:560a6744936c | 122 | FRESULT sync ( /* FR_OK: successful, FR_RW_ERROR: failed */ |
simon | 0:560a6744936c | 123 | FATFS *fs /* File system object */ |
simon | 0:560a6744936c | 124 | ) |
simon | 0:560a6744936c | 125 | { |
simon | 0:560a6744936c | 126 | fs->winflag = 1; |
simon | 0:560a6744936c | 127 | if (!move_window(fs, 0)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 128 | #if _USE_FSINFO |
simon | 0:560a6744936c | 129 | /* Update FSInfo sector if needed */ |
simon | 0:560a6744936c | 130 | if (fs->fs_type == FS_FAT32 && fs->fsi_flag) { |
simon | 0:560a6744936c | 131 | fs->winsect = 0; |
simon | 0:560a6744936c | 132 | memset(fs->win, 0, 512); |
simon | 0:560a6744936c | 133 | ST_WORD(&fs->win[BS_55AA], 0xAA55); |
simon | 0:560a6744936c | 134 | ST_DWORD(&fs->win[FSI_LeadSig], 0x41615252); |
simon | 0:560a6744936c | 135 | ST_DWORD(&fs->win[FSI_StrucSig], 0x61417272); |
simon | 0:560a6744936c | 136 | ST_DWORD(&fs->win[FSI_Free_Count], fs->free_clust); |
simon | 0:560a6744936c | 137 | ST_DWORD(&fs->win[FSI_Nxt_Free], fs->last_clust); |
simon | 0:560a6744936c | 138 | disk_write(fs->drive, fs->win, fs->fsi_sector, 1); |
simon | 0:560a6744936c | 139 | fs->fsi_flag = 0; |
simon | 0:560a6744936c | 140 | } |
simon | 0:560a6744936c | 141 | #endif |
simon | 0:560a6744936c | 142 | /* Make sure that no pending write process in the physical drive */ |
simon | 0:560a6744936c | 143 | if (disk_ioctl(fs->drive, CTRL_SYNC, NULL) != RES_OK) |
simon | 0:560a6744936c | 144 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 145 | return FR_OK; |
simon | 0:560a6744936c | 146 | } |
simon | 0:560a6744936c | 147 | #endif |
simon | 0:560a6744936c | 148 | |
simon | 0:560a6744936c | 149 | |
simon | 0:560a6744936c | 150 | |
simon | 0:560a6744936c | 151 | |
simon | 0:560a6744936c | 152 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 153 | /* Get a cluster status */ |
simon | 0:560a6744936c | 154 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 155 | |
simon | 0:560a6744936c | 156 | static |
simon | 0:560a6744936c | 157 | DWORD get_cluster ( /* 0,>=2: successful, 1: failed */ |
simon | 0:560a6744936c | 158 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 159 | DWORD clust /* Cluster# to get the link information */ |
simon | 0:560a6744936c | 160 | ) |
simon | 0:560a6744936c | 161 | { |
simon | 0:560a6744936c | 162 | WORD wc, bc; |
simon | 0:560a6744936c | 163 | DWORD fatsect; |
simon | 0:560a6744936c | 164 | |
simon | 0:560a6744936c | 165 | |
simon | 0:560a6744936c | 166 | if (clust >= 2 && clust < fs->max_clust) { /* Is it a valid cluster#? */ |
simon | 0:560a6744936c | 167 | fatsect = fs->fatbase; |
simon | 0:560a6744936c | 168 | switch (fs->fs_type) { |
simon | 0:560a6744936c | 169 | case FS_FAT12 : |
simon | 0:560a6744936c | 170 | bc = (WORD)clust * 3 / 2; |
simon | 0:560a6744936c | 171 | if (!move_window(fs, fatsect + (bc / SS(fs)))) break; |
simon | 0:560a6744936c | 172 | wc = fs->win[bc & (SS(fs) - 1)]; bc++; |
simon | 0:560a6744936c | 173 | if (!move_window(fs, fatsect + (bc / SS(fs)))) break; |
simon | 0:560a6744936c | 174 | wc |= (WORD)fs->win[bc & (SS(fs) - 1)] << 8; |
simon | 0:560a6744936c | 175 | return (clust & 1) ? (wc >> 4) : (wc & 0xFFF); |
simon | 0:560a6744936c | 176 | |
simon | 0:560a6744936c | 177 | case FS_FAT16 : |
simon | 0:560a6744936c | 178 | if (!move_window(fs, fatsect + (clust / (SS(fs) / 2)))) break; |
simon | 0:560a6744936c | 179 | return LD_WORD(&fs->win[((WORD)clust * 2) & (SS(fs) - 1)]); |
simon | 0:560a6744936c | 180 | |
simon | 0:560a6744936c | 181 | case FS_FAT32 : |
simon | 0:560a6744936c | 182 | if (!move_window(fs, fatsect + (clust / (SS(fs) / 4)))) break; |
simon | 0:560a6744936c | 183 | return LD_DWORD(&fs->win[((WORD)clust * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF; |
simon | 0:560a6744936c | 184 | } |
simon | 0:560a6744936c | 185 | } |
simon | 0:560a6744936c | 186 | |
simon | 0:560a6744936c | 187 | return 1; /* Out of cluster range, or an error occured */ |
simon | 0:560a6744936c | 188 | } |
simon | 0:560a6744936c | 189 | |
simon | 0:560a6744936c | 190 | |
simon | 0:560a6744936c | 191 | |
simon | 0:560a6744936c | 192 | |
simon | 0:560a6744936c | 193 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 194 | /* Change a cluster status */ |
simon | 0:560a6744936c | 195 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 196 | |
simon | 0:560a6744936c | 197 | #if !_FS_READONLY |
simon | 0:560a6744936c | 198 | static |
simon | 0:560a6744936c | 199 | BOOL put_cluster ( /* TRUE: successful, FALSE: failed */ |
simon | 0:560a6744936c | 200 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 201 | DWORD clust, /* Cluster# to change (must be 2 to fs->max_clust-1) */ |
simon | 0:560a6744936c | 202 | DWORD val /* New value to mark the cluster */ |
simon | 0:560a6744936c | 203 | ) |
simon | 0:560a6744936c | 204 | { |
simon | 0:560a6744936c | 205 | WORD bc; |
simon | 0:560a6744936c | 206 | BYTE *p; |
simon | 0:560a6744936c | 207 | DWORD fatsect; |
simon | 0:560a6744936c | 208 | |
simon | 0:560a6744936c | 209 | |
simon | 0:560a6744936c | 210 | fatsect = fs->fatbase; |
simon | 0:560a6744936c | 211 | switch (fs->fs_type) { |
simon | 0:560a6744936c | 212 | case FS_FAT12 : |
simon | 0:560a6744936c | 213 | bc = (WORD)clust * 3 / 2; |
simon | 0:560a6744936c | 214 | if (!move_window(fs, fatsect + (bc / SS(fs)))) return FALSE; |
simon | 0:560a6744936c | 215 | p = &fs->win[bc & (SS(fs) - 1)]; |
simon | 0:560a6744936c | 216 | *p = (clust & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; |
simon | 0:560a6744936c | 217 | bc++; |
simon | 0:560a6744936c | 218 | fs->winflag = 1; |
simon | 0:560a6744936c | 219 | if (!move_window(fs, fatsect + (bc / SS(fs)))) return FALSE; |
simon | 0:560a6744936c | 220 | p = &fs->win[bc & (SS(fs) - 1)]; |
simon | 0:560a6744936c | 221 | *p = (clust & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); |
simon | 0:560a6744936c | 222 | break; |
simon | 0:560a6744936c | 223 | |
simon | 0:560a6744936c | 224 | case FS_FAT16 : |
simon | 0:560a6744936c | 225 | if (!move_window(fs, fatsect + (clust / (SS(fs) / 2)))) return FALSE; |
simon | 0:560a6744936c | 226 | ST_WORD(&fs->win[((WORD)clust * 2) & (SS(fs) - 1)], (WORD)val); |
simon | 0:560a6744936c | 227 | break; |
simon | 0:560a6744936c | 228 | |
simon | 0:560a6744936c | 229 | case FS_FAT32 : |
simon | 0:560a6744936c | 230 | if (!move_window(fs, fatsect + (clust / (SS(fs) / 4)))) return FALSE; |
simon | 0:560a6744936c | 231 | ST_DWORD(&fs->win[((WORD)clust * 4) & (SS(fs) - 1)], val); |
simon | 0:560a6744936c | 232 | break; |
simon | 0:560a6744936c | 233 | |
simon | 0:560a6744936c | 234 | default : |
simon | 0:560a6744936c | 235 | return FALSE; |
simon | 0:560a6744936c | 236 | } |
simon | 0:560a6744936c | 237 | fs->winflag = 1; |
simon | 0:560a6744936c | 238 | return TRUE; |
simon | 0:560a6744936c | 239 | } |
simon | 0:560a6744936c | 240 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 241 | |
simon | 0:560a6744936c | 242 | |
simon | 0:560a6744936c | 243 | |
simon | 0:560a6744936c | 244 | |
simon | 0:560a6744936c | 245 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 246 | /* Remove a cluster chain */ |
simon | 0:560a6744936c | 247 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 248 | |
simon | 0:560a6744936c | 249 | #if !_FS_READONLY |
simon | 0:560a6744936c | 250 | static |
simon | 0:560a6744936c | 251 | BOOL remove_chain ( /* TRUE: successful, FALSE: failed */ |
simon | 0:560a6744936c | 252 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 253 | DWORD clust /* Cluster# to remove chain from */ |
simon | 0:560a6744936c | 254 | ) |
simon | 0:560a6744936c | 255 | { |
simon | 0:560a6744936c | 256 | DWORD nxt; |
simon | 0:560a6744936c | 257 | |
simon | 0:560a6744936c | 258 | |
simon | 0:560a6744936c | 259 | while (clust >= 2 && clust < fs->max_clust) { |
simon | 0:560a6744936c | 260 | nxt = get_cluster(fs, clust); |
simon | 0:560a6744936c | 261 | if (nxt == 1) return FALSE; |
simon | 0:560a6744936c | 262 | if (!put_cluster(fs, clust, 0)) return FALSE; |
simon | 0:560a6744936c | 263 | if (fs->free_clust != 0xFFFFFFFF) { |
simon | 0:560a6744936c | 264 | fs->free_clust++; |
simon | 0:560a6744936c | 265 | #if _USE_FSINFO |
simon | 0:560a6744936c | 266 | fs->fsi_flag = 1; |
simon | 0:560a6744936c | 267 | #endif |
simon | 0:560a6744936c | 268 | } |
simon | 0:560a6744936c | 269 | clust = nxt; |
simon | 0:560a6744936c | 270 | } |
simon | 0:560a6744936c | 271 | return TRUE; |
simon | 0:560a6744936c | 272 | } |
simon | 0:560a6744936c | 273 | #endif |
simon | 0:560a6744936c | 274 | |
simon | 0:560a6744936c | 275 | |
simon | 0:560a6744936c | 276 | |
simon | 0:560a6744936c | 277 | |
simon | 0:560a6744936c | 278 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 279 | /* Stretch or create a cluster chain */ |
simon | 0:560a6744936c | 280 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 281 | |
simon | 0:560a6744936c | 282 | #if !_FS_READONLY |
simon | 0:560a6744936c | 283 | static |
simon | 0:560a6744936c | 284 | DWORD create_chain ( /* 0: No free cluster, 1: Error, >=2: New cluster number */ |
simon | 0:560a6744936c | 285 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 286 | DWORD clust /* Cluster# to stretch, 0 means create new */ |
simon | 0:560a6744936c | 287 | ) |
simon | 0:560a6744936c | 288 | { |
simon | 0:560a6744936c | 289 | DWORD cstat, ncl, scl, mcl = fs->max_clust; |
simon | 0:560a6744936c | 290 | |
simon | 0:560a6744936c | 291 | |
simon | 0:560a6744936c | 292 | if (clust == 0) { /* Create new chain */ |
simon | 0:560a6744936c | 293 | scl = fs->last_clust; /* Get suggested start point */ |
simon | 0:560a6744936c | 294 | if (scl == 0 || scl >= mcl) scl = 1; |
simon | 0:560a6744936c | 295 | } |
simon | 0:560a6744936c | 296 | else { /* Stretch existing chain */ |
simon | 0:560a6744936c | 297 | cstat = get_cluster(fs, clust); /* Check the cluster status */ |
simon | 0:560a6744936c | 298 | if (cstat < 2) return 1; /* It is an invalid cluster */ |
simon | 0:560a6744936c | 299 | if (cstat < mcl) return cstat; /* It is already followed by next cluster */ |
simon | 0:560a6744936c | 300 | scl = clust; |
simon | 0:560a6744936c | 301 | } |
simon | 0:560a6744936c | 302 | |
simon | 0:560a6744936c | 303 | ncl = scl; /* Start cluster */ |
simon | 0:560a6744936c | 304 | for (;;) { |
simon | 0:560a6744936c | 305 | ncl++; /* Next cluster */ |
simon | 0:560a6744936c | 306 | if (ncl >= mcl) { /* Wrap around */ |
simon | 0:560a6744936c | 307 | ncl = 2; |
simon | 0:560a6744936c | 308 | if (ncl > scl) return 0; /* No free custer */ |
simon | 0:560a6744936c | 309 | } |
simon | 0:560a6744936c | 310 | cstat = get_cluster(fs, ncl); /* Get the cluster status */ |
simon | 0:560a6744936c | 311 | if (cstat == 0) break; /* Found a free cluster */ |
simon | 0:560a6744936c | 312 | if (cstat == 1) return 1; /* Any error occured */ |
simon | 0:560a6744936c | 313 | if (ncl == scl) return 0; /* No free custer */ |
simon | 0:560a6744936c | 314 | } |
simon | 0:560a6744936c | 315 | |
simon | 0:560a6744936c | 316 | if (!put_cluster(fs, ncl, 0x0FFFFFFF)) return 1; /* Mark the new cluster "in use" */ |
simon | 0:560a6744936c | 317 | if (clust != 0 && !put_cluster(fs, clust, ncl)) return 1; /* Link it to previous one if needed */ |
simon | 0:560a6744936c | 318 | |
simon | 0:560a6744936c | 319 | fs->last_clust = ncl; /* Update fsinfo */ |
simon | 0:560a6744936c | 320 | if (fs->free_clust != 0xFFFFFFFF) { |
simon | 0:560a6744936c | 321 | fs->free_clust--; |
simon | 0:560a6744936c | 322 | #if _USE_FSINFO |
simon | 0:560a6744936c | 323 | fs->fsi_flag = 1; |
simon | 0:560a6744936c | 324 | #endif |
simon | 0:560a6744936c | 325 | } |
simon | 0:560a6744936c | 326 | |
simon | 0:560a6744936c | 327 | return ncl; /* Return new cluster number */ |
simon | 0:560a6744936c | 328 | } |
simon | 0:560a6744936c | 329 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 330 | |
simon | 0:560a6744936c | 331 | |
simon | 0:560a6744936c | 332 | |
simon | 0:560a6744936c | 333 | |
simon | 0:560a6744936c | 334 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 335 | /* Get sector# from cluster# */ |
simon | 0:560a6744936c | 336 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 337 | |
simon | 0:560a6744936c | 338 | static |
simon | 0:560a6744936c | 339 | DWORD clust2sect ( /* !=0: sector number, 0: failed - invalid cluster# */ |
simon | 0:560a6744936c | 340 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 341 | DWORD clust /* Cluster# to be converted */ |
simon | 0:560a6744936c | 342 | ) |
simon | 0:560a6744936c | 343 | { |
simon | 0:560a6744936c | 344 | clust -= 2; |
simon | 0:560a6744936c | 345 | if (clust >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */ |
simon | 0:560a6744936c | 346 | return clust * fs->csize + fs->database; |
simon | 0:560a6744936c | 347 | } |
simon | 0:560a6744936c | 348 | |
simon | 0:560a6744936c | 349 | |
simon | 0:560a6744936c | 350 | |
simon | 0:560a6744936c | 351 | |
simon | 0:560a6744936c | 352 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 353 | /* Move directory pointer to next */ |
simon | 0:560a6744936c | 354 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 355 | |
simon | 0:560a6744936c | 356 | static |
simon | 0:560a6744936c | 357 | BOOL next_dir_entry ( /* TRUE: successful, FALSE: could not move next */ |
simon | 0:560a6744936c | 358 | FATFS_DIR *dj /* Pointer to directory object */ |
simon | 0:560a6744936c | 359 | ) |
simon | 0:560a6744936c | 360 | { |
simon | 0:560a6744936c | 361 | DWORD clust; |
simon | 0:560a6744936c | 362 | WORD idx; |
simon | 0:560a6744936c | 363 | |
simon | 0:560a6744936c | 364 | |
simon | 0:560a6744936c | 365 | idx = dj->index + 1; |
simon | 0:560a6744936c | 366 | if ((idx & ((SS(dj->fs) - 1) / 32)) == 0) { /* Table sector changed? */ |
simon | 0:560a6744936c | 367 | dj->sect++; /* Next sector */ |
simon | 0:560a6744936c | 368 | if (dj->clust == 0) { /* In static table */ |
simon | 0:560a6744936c | 369 | if (idx >= dj->fs->n_rootdir) return FALSE; /* Reached to end of table */ |
simon | 0:560a6744936c | 370 | } else { /* In dynamic table */ |
simon | 0:560a6744936c | 371 | if (((idx / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */ |
simon | 0:560a6744936c | 372 | clust = get_cluster(dj->fs, dj->clust); /* Get next cluster */ |
simon | 0:560a6744936c | 373 | if (clust < 2 || clust >= dj->fs->max_clust) /* Reached to end of table */ |
simon | 0:560a6744936c | 374 | return FALSE; |
simon | 0:560a6744936c | 375 | dj->clust = clust; /* Initialize for new cluster */ |
simon | 0:560a6744936c | 376 | dj->sect = clust2sect(dj->fs, clust); |
simon | 0:560a6744936c | 377 | } |
simon | 0:560a6744936c | 378 | } |
simon | 0:560a6744936c | 379 | } |
simon | 0:560a6744936c | 380 | dj->index = idx; /* Lower several bits of dj->index indicates offset in dj->sect */ |
simon | 0:560a6744936c | 381 | return TRUE; |
simon | 0:560a6744936c | 382 | } |
simon | 0:560a6744936c | 383 | |
simon | 0:560a6744936c | 384 | |
simon | 0:560a6744936c | 385 | |
simon | 0:560a6744936c | 386 | |
simon | 0:560a6744936c | 387 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 388 | /* Get file status from directory entry */ |
simon | 0:560a6744936c | 389 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 390 | |
simon | 0:560a6744936c | 391 | #if _FS_MINIMIZE <= 1 |
simon | 0:560a6744936c | 392 | static |
simon | 0:560a6744936c | 393 | void get_fileinfo ( /* No return code */ |
simon | 0:560a6744936c | 394 | FILINFO *finfo, /* Ptr to store the file information */ |
simon | 0:560a6744936c | 395 | const BYTE *dir /* Ptr to the directory entry */ |
simon | 0:560a6744936c | 396 | ) |
simon | 0:560a6744936c | 397 | { |
simon | 0:560a6744936c | 398 | BYTE n, c, a; |
simon | 0:560a6744936c | 399 | char *p; |
simon | 0:560a6744936c | 400 | |
simon | 0:560a6744936c | 401 | |
simon | 0:560a6744936c | 402 | p = &finfo->fname[0]; |
simon | 0:560a6744936c | 403 | a = _USE_NTFLAG ? dir[DIR_NTres] : 0; /* NT flag */ |
simon | 0:560a6744936c | 404 | for (n = 0; n < 8; n++) { /* Convert file name (body) */ |
simon | 0:560a6744936c | 405 | c = dir[n]; |
simon | 0:560a6744936c | 406 | if (c == ' ') break; |
simon | 0:560a6744936c | 407 | if (c == 0x05) c = 0xE5; |
simon | 0:560a6744936c | 408 | if (a & 0x08 && c >= 'A' && c <= 'Z') c += 0x20; |
simon | 0:560a6744936c | 409 | *p++ = c; |
simon | 0:560a6744936c | 410 | } |
simon | 0:560a6744936c | 411 | if (dir[8] != ' ') { /* Convert file name (extension) */ |
simon | 0:560a6744936c | 412 | *p++ = '.'; |
simon | 0:560a6744936c | 413 | for (n = 8; n < 11; n++) { |
simon | 0:560a6744936c | 414 | c = dir[n]; |
simon | 0:560a6744936c | 415 | if (c == ' ') break; |
simon | 0:560a6744936c | 416 | if (a & 0x10 && c >= 'A' && c <= 'Z') c += 0x20; |
simon | 0:560a6744936c | 417 | *p++ = c; |
simon | 0:560a6744936c | 418 | } |
simon | 0:560a6744936c | 419 | } |
simon | 0:560a6744936c | 420 | *p = '\0'; |
simon | 0:560a6744936c | 421 | |
simon | 0:560a6744936c | 422 | finfo->fattrib = dir[DIR_Attr]; /* Attribute */ |
simon | 0:560a6744936c | 423 | finfo->fsize = LD_DWORD(&dir[DIR_FileSize]); /* Size */ |
simon | 0:560a6744936c | 424 | finfo->fdate = LD_WORD(&dir[DIR_WrtDate]); /* Date */ |
simon | 0:560a6744936c | 425 | finfo->ftime = LD_WORD(&dir[DIR_WrtTime]); /* Time */ |
simon | 0:560a6744936c | 426 | } |
simon | 0:560a6744936c | 427 | #endif /* _FS_MINIMIZE <= 1 */ |
simon | 0:560a6744936c | 428 | |
simon | 0:560a6744936c | 429 | |
simon | 0:560a6744936c | 430 | |
simon | 0:560a6744936c | 431 | |
simon | 0:560a6744936c | 432 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 433 | /* Pick a paragraph and create the name in format of directory entry */ |
simon | 0:560a6744936c | 434 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 435 | |
simon | 0:560a6744936c | 436 | static |
simon | 0:560a6744936c | 437 | char make_dirfile ( /* 1: error - detected an invalid format, '\0'or'/': next character */ |
simon | 0:560a6744936c | 438 | const char **path, /* Pointer to the file path pointer */ |
simon | 0:560a6744936c | 439 | char *dirname /* Pointer to directory name buffer {Name(8), Ext(3), NT flag(1)} */ |
simon | 0:560a6744936c | 440 | ) |
simon | 0:560a6744936c | 441 | { |
simon | 0:560a6744936c | 442 | BYTE n, t, c, a, b; |
simon | 0:560a6744936c | 443 | |
simon | 0:560a6744936c | 444 | |
simon | 0:560a6744936c | 445 | memset(dirname, ' ', 8+3); /* Fill buffer with spaces */ |
simon | 0:560a6744936c | 446 | a = 0; b = 0x18; /* NT flag */ |
simon | 0:560a6744936c | 447 | n = 0; t = 8; |
simon | 0:560a6744936c | 448 | for (;;) { |
simon | 0:560a6744936c | 449 | c = *(*path)++; |
simon | 0:560a6744936c | 450 | if (c == '\0' || c == '/') { /* Reached to end of str or directory separator */ |
simon | 0:560a6744936c | 451 | if (n == 0) break; |
simon | 0:560a6744936c | 452 | dirname[11] = _USE_NTFLAG ? (a & b) : 0; |
simon | 0:560a6744936c | 453 | return c; |
simon | 0:560a6744936c | 454 | } |
simon | 0:560a6744936c | 455 | if (c <= ' ' || c == 0x7F) break; /* Reject invisible chars */ |
simon | 0:560a6744936c | 456 | if (c == '.') { |
simon | 0:560a6744936c | 457 | if (!(a & 1) && n >= 1 && n <= 8) { /* Enter extension part */ |
simon | 0:560a6744936c | 458 | n = 8; t = 11; continue; |
simon | 0:560a6744936c | 459 | } |
simon | 0:560a6744936c | 460 | break; |
simon | 0:560a6744936c | 461 | } |
simon | 0:560a6744936c | 462 | if (_USE_SJIS && |
simon | 0:560a6744936c | 463 | ((c >= 0x81 && c <= 0x9F) || /* Accept S-JIS code */ |
simon | 0:560a6744936c | 464 | (c >= 0xE0 && c <= 0xFC))) { |
simon | 0:560a6744936c | 465 | if (n == 0 && c == 0xE5) /* Change heading \xE5 to \x05 */ |
simon | 0:560a6744936c | 466 | c = 0x05; |
simon | 0:560a6744936c | 467 | a ^= 0x01; goto md_l2; |
simon | 0:560a6744936c | 468 | } |
simon | 0:560a6744936c | 469 | if (c == '"') break; /* Reject " */ |
simon | 0:560a6744936c | 470 | if (c <= ')') goto md_l1; /* Accept ! # $ % & ' ( ) */ |
simon | 0:560a6744936c | 471 | if (c <= ',') break; /* Reject * + , */ |
simon | 0:560a6744936c | 472 | if (c <= '9') goto md_l1; /* Accept - 0-9 */ |
simon | 0:560a6744936c | 473 | if (c <= '?') break; /* Reject : ; < = > ? */ |
simon | 0:560a6744936c | 474 | if (!(a & 1)) { /* These checks are not applied to S-JIS 2nd byte */ |
simon | 0:560a6744936c | 475 | if (c == '|') break; /* Reject | */ |
simon | 0:560a6744936c | 476 | if (c >= '[' && c <= ']') break;/* Reject [ \ ] */ |
simon | 0:560a6744936c | 477 | if (_USE_NTFLAG && c >= 'A' && c <= 'Z') |
simon | 0:560a6744936c | 478 | (t == 8) ? (b &= 0xF7) : (b &= 0xEF); |
simon | 0:560a6744936c | 479 | if (c >= 'a' && c <= 'z') { /* Convert to upper case */ |
simon | 0:560a6744936c | 480 | c -= 0x20; |
simon | 0:560a6744936c | 481 | if (_USE_NTFLAG) (t == 8) ? (a |= 0x08) : (a |= 0x10); |
simon | 0:560a6744936c | 482 | } |
simon | 0:560a6744936c | 483 | } |
simon | 0:560a6744936c | 484 | md_l1: |
simon | 0:560a6744936c | 485 | a &= 0xFE; |
simon | 0:560a6744936c | 486 | md_l2: |
simon | 0:560a6744936c | 487 | if (n >= t) break; |
simon | 0:560a6744936c | 488 | dirname[n++] = c; |
simon | 0:560a6744936c | 489 | } |
simon | 0:560a6744936c | 490 | return 1; |
simon | 0:560a6744936c | 491 | } |
simon | 0:560a6744936c | 492 | |
simon | 0:560a6744936c | 493 | |
simon | 0:560a6744936c | 494 | |
simon | 0:560a6744936c | 495 | |
simon | 0:560a6744936c | 496 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 497 | /* Trace a file path */ |
simon | 0:560a6744936c | 498 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 499 | |
simon | 0:560a6744936c | 500 | static |
simon | 0:560a6744936c | 501 | FRESULT trace_path ( /* FR_OK(0): successful, !=0: error code */ |
simon | 0:560a6744936c | 502 | FATFS_DIR *dj, /* Pointer to directory object to return last directory */ |
simon | 0:560a6744936c | 503 | char *fn, /* Pointer to last segment name to return {file(8),ext(3),attr(1)} */ |
simon | 0:560a6744936c | 504 | const char *path, /* Full-path string to trace a file or directory */ |
simon | 0:560a6744936c | 505 | BYTE **dir /* Pointer to pointer to found entry to retutn */ |
simon | 0:560a6744936c | 506 | ) |
simon | 0:560a6744936c | 507 | { |
simon | 0:560a6744936c | 508 | DWORD clust; |
simon | 0:560a6744936c | 509 | char ds; |
simon | 0:560a6744936c | 510 | BYTE *dptr = NULL; |
simon | 0:560a6744936c | 511 | FATFS *fs = dj->fs; |
simon | 0:560a6744936c | 512 | |
simon | 0:560a6744936c | 513 | |
simon | 0:560a6744936c | 514 | /* Initialize directory object */ |
simon | 0:560a6744936c | 515 | clust = fs->dirbase; |
simon | 0:560a6744936c | 516 | if (fs->fs_type == FS_FAT32) { |
simon | 0:560a6744936c | 517 | dj->clust = dj->sclust = clust; |
simon | 0:560a6744936c | 518 | dj->sect = clust2sect(fs, clust); |
simon | 0:560a6744936c | 519 | } else { |
simon | 0:560a6744936c | 520 | dj->clust = dj->sclust = 0; |
simon | 0:560a6744936c | 521 | dj->sect = clust; |
simon | 0:560a6744936c | 522 | } |
simon | 0:560a6744936c | 523 | dj->index = 0; |
simon | 0:560a6744936c | 524 | |
simon | 0:560a6744936c | 525 | if (*path == '\0') { /* Null path means the root directory */ |
simon | 0:560a6744936c | 526 | *dir = NULL; return FR_OK; |
simon | 0:560a6744936c | 527 | } |
simon | 0:560a6744936c | 528 | |
simon | 0:560a6744936c | 529 | for (;;) { |
simon | 0:560a6744936c | 530 | ds = make_dirfile(&path, fn); /* Get a paragraph into fn[] */ |
simon | 0:560a6744936c | 531 | if (ds == 1) return FR_INVALID_NAME; |
simon | 0:560a6744936c | 532 | for (;;) { |
simon | 0:560a6744936c | 533 | if (!move_window(fs, dj->sect)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 534 | dptr = &fs->win[(dj->index & ((SS(fs) - 1) / 32)) * 32]; /* Pointer to the directory entry */ |
simon | 0:560a6744936c | 535 | if (dptr[DIR_Name] == 0) /* Has it reached to end of dir? */ |
simon | 0:560a6744936c | 536 | return !ds ? FR_NO_FILE : FR_NO_PATH; |
simon | 0:560a6744936c | 537 | if (dptr[DIR_Name] != 0xE5 /* Matched? */ |
simon | 0:560a6744936c | 538 | && !(dptr[DIR_Attr] & AM_VOL) |
simon | 0:560a6744936c | 539 | && !memcmp(&dptr[DIR_Name], fn, 8+3) ) break; |
simon | 0:560a6744936c | 540 | if (!next_dir_entry(dj)) /* Next directory pointer */ |
simon | 0:560a6744936c | 541 | return !ds ? FR_NO_FILE : FR_NO_PATH; |
simon | 0:560a6744936c | 542 | } |
simon | 0:560a6744936c | 543 | if (!ds) { *dir = dptr; return FR_OK; } /* Matched with end of path */ |
simon | 0:560a6744936c | 544 | if (!(dptr[DIR_Attr] & AM_DIR)) return FR_NO_PATH; /* Cannot trace because it is a file */ |
simon | 0:560a6744936c | 545 | clust = ((DWORD)LD_WORD(&dptr[DIR_FstClusHI]) << 16) | LD_WORD(&dptr[DIR_FstClusLO]); /* Get cluster# of the directory */ |
simon | 0:560a6744936c | 546 | dj->clust = dj->sclust = clust; /* Restart scanning at the new directory */ |
simon | 0:560a6744936c | 547 | dj->sect = clust2sect(fs, clust); |
simon | 0:560a6744936c | 548 | dj->index = 2; |
simon | 0:560a6744936c | 549 | } |
simon | 0:560a6744936c | 550 | } |
simon | 0:560a6744936c | 551 | |
simon | 0:560a6744936c | 552 | |
simon | 0:560a6744936c | 553 | |
simon | 0:560a6744936c | 554 | |
simon | 0:560a6744936c | 555 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 556 | /* Reserve a directory entry */ |
simon | 0:560a6744936c | 557 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 558 | |
simon | 0:560a6744936c | 559 | #if !_FS_READONLY |
simon | 0:560a6744936c | 560 | static |
simon | 0:560a6744936c | 561 | FRESULT reserve_direntry ( /* FR_OK: successful, FR_DENIED: no free entry, FR_RW_ERROR: a disk error occured */ |
simon | 0:560a6744936c | 562 | FATFS_DIR *dj, /* Target directory to create new entry */ |
simon | 0:560a6744936c | 563 | BYTE **dir /* Pointer to pointer to created entry to retutn */ |
simon | 0:560a6744936c | 564 | ) |
simon | 0:560a6744936c | 565 | { |
simon | 0:560a6744936c | 566 | DWORD clust, sector; |
simon | 0:560a6744936c | 567 | BYTE c, n, *dptr; |
simon | 0:560a6744936c | 568 | FATFS *fs = dj->fs; |
simon | 0:560a6744936c | 569 | |
simon | 0:560a6744936c | 570 | |
simon | 0:560a6744936c | 571 | /* Re-initialize directory object */ |
simon | 0:560a6744936c | 572 | clust = dj->sclust; |
simon | 0:560a6744936c | 573 | if (clust != 0) { /* Dyanmic directory table */ |
simon | 0:560a6744936c | 574 | dj->clust = clust; |
simon | 0:560a6744936c | 575 | dj->sect = clust2sect(fs, clust); |
simon | 0:560a6744936c | 576 | } else { /* Static directory table */ |
simon | 0:560a6744936c | 577 | dj->sect = fs->dirbase; |
simon | 0:560a6744936c | 578 | } |
simon | 0:560a6744936c | 579 | dj->index = 0; |
simon | 0:560a6744936c | 580 | |
simon | 0:560a6744936c | 581 | do { |
simon | 0:560a6744936c | 582 | if (!move_window(fs, dj->sect)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 583 | dptr = &fs->win[(dj->index & ((SS(dj->fs) - 1) / 32)) * 32]; /* Pointer to the directory entry */ |
simon | 0:560a6744936c | 584 | c = dptr[DIR_Name]; |
simon | 0:560a6744936c | 585 | if (c == 0 || c == 0xE5) { /* Found an empty entry */ |
simon | 0:560a6744936c | 586 | *dir = dptr; return FR_OK; |
simon | 0:560a6744936c | 587 | } |
simon | 0:560a6744936c | 588 | } while (next_dir_entry(dj)); /* Next directory pointer */ |
simon | 0:560a6744936c | 589 | /* Reached to end of the directory table */ |
simon | 0:560a6744936c | 590 | |
simon | 0:560a6744936c | 591 | /* Abort when it is a static table or could not stretch dynamic table */ |
simon | 0:560a6744936c | 592 | if (clust == 0 || ((clust = create_chain(fs, dj->clust)) == 0)) return FR_DENIED; |
simon | 0:560a6744936c | 593 | if (clust == 1 || !move_window(fs, 0)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 594 | |
simon | 0:560a6744936c | 595 | /* Cleanup the expanded table */ |
simon | 0:560a6744936c | 596 | fs->winsect = sector = clust2sect(fs, clust); |
simon | 0:560a6744936c | 597 | memset(fs->win, 0, SS(fs)); |
simon | 0:560a6744936c | 598 | for (n = fs->csize; n; n--) { |
simon | 0:560a6744936c | 599 | if (disk_write(fs->drive, fs->win, sector, 1) != RES_OK) |
simon | 0:560a6744936c | 600 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 601 | sector++; |
simon | 0:560a6744936c | 602 | } |
simon | 0:560a6744936c | 603 | fs->winflag = 1; |
simon | 0:560a6744936c | 604 | *dir = fs->win; |
simon | 0:560a6744936c | 605 | |
simon | 0:560a6744936c | 606 | return FR_OK; |
simon | 0:560a6744936c | 607 | } |
simon | 0:560a6744936c | 608 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 609 | |
simon | 0:560a6744936c | 610 | |
simon | 0:560a6744936c | 611 | |
simon | 0:560a6744936c | 612 | |
simon | 0:560a6744936c | 613 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 614 | /* Load boot record and check if it is an FAT boot record */ |
simon | 0:560a6744936c | 615 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 616 | |
simon | 0:560a6744936c | 617 | static |
simon | 0:560a6744936c | 618 | BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record or error */ |
simon | 0:560a6744936c | 619 | FATFS *fs, /* File system object */ |
simon | 0:560a6744936c | 620 | DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */ |
simon | 0:560a6744936c | 621 | ) |
simon | 0:560a6744936c | 622 | { |
simon | 0:560a6744936c | 623 | if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */ |
simon | 0:560a6744936c | 624 | return 2; |
simon | 0:560a6744936c | 625 | if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */ |
simon | 0:560a6744936c | 626 | return 2; |
simon | 0:560a6744936c | 627 | |
simon | 0:560a6744936c | 628 | if (!memcmp(&fs->win[BS_FilSysType], "FAT", 3)) /* Check FAT signature */ |
simon | 0:560a6744936c | 629 | return 0; |
simon | 0:560a6744936c | 630 | if (!memcmp(&fs->win[BS_FilSysType32], "FAT32", 5) && !(fs->win[BPB_ExtFlags] & 0x80)) |
simon | 0:560a6744936c | 631 | return 0; |
simon | 0:560a6744936c | 632 | |
simon | 0:560a6744936c | 633 | return 1; |
simon | 0:560a6744936c | 634 | } |
simon | 0:560a6744936c | 635 | |
simon | 0:560a6744936c | 636 | |
simon | 0:560a6744936c | 637 | |
simon | 0:560a6744936c | 638 | |
simon | 0:560a6744936c | 639 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 640 | /* Make sure that the file system is valid */ |
simon | 0:560a6744936c | 641 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 642 | |
simon | 0:560a6744936c | 643 | static |
simon | 0:560a6744936c | 644 | FRESULT auto_mount ( /* FR_OK(0): successful, !=0: any error occured */ |
simon | 0:560a6744936c | 645 | const char **path, /* Pointer to pointer to the path name (drive number) */ |
simon | 0:560a6744936c | 646 | FATFS **rfs, /* Pointer to pointer to the found file system object */ |
simon | 0:560a6744936c | 647 | BYTE chk_wp /* !=0: Check media write protection for write access */ |
simon | 0:560a6744936c | 648 | ) |
simon | 0:560a6744936c | 649 | { |
simon | 0:560a6744936c | 650 | BYTE drv, fmt, *tbl; |
simon | 0:560a6744936c | 651 | DSTATUS stat; |
simon | 0:560a6744936c | 652 | DWORD bootsect, fatsize, totalsect, maxclust; |
simon | 0:560a6744936c | 653 | const char *p = *path; |
simon | 0:560a6744936c | 654 | FATFS *fs; |
simon | 0:560a6744936c | 655 | |
simon | 0:560a6744936c | 656 | |
simon | 0:560a6744936c | 657 | /* Get drive number from the path name */ |
simon | 0:560a6744936c | 658 | while (*p == ' ') p++; /* Strip leading spaces */ |
simon | 0:560a6744936c | 659 | drv = p[0] - '0'; /* Is there a drive number? */ |
simon | 0:560a6744936c | 660 | if (drv <= 9 && p[1] == ':') |
simon | 0:560a6744936c | 661 | p += 2; /* Found a drive number, get and strip it */ |
simon | 0:560a6744936c | 662 | else |
simon | 0:560a6744936c | 663 | drv = 0; /* No drive number is given, use drive number 0 as default */ |
simon | 0:560a6744936c | 664 | if (*p == '/') p++; /* Strip heading slash */ |
simon | 0:560a6744936c | 665 | *path = p; /* Return pointer to the path name */ |
simon | 0:560a6744936c | 666 | |
simon | 0:560a6744936c | 667 | /* Check if the drive number is valid or not */ |
simon | 0:560a6744936c | 668 | if (drv >= _DRIVES) return FR_INVALID_DRIVE; /* Is the drive number valid? */ |
simon | 0:560a6744936c | 669 | *rfs = fs = FatFs[drv]; /* Returen pointer to the corresponding file system object */ |
simon | 0:560a6744936c | 670 | if (!fs) return FR_NOT_ENABLED; /* Is the file system object registered? */ |
simon | 0:560a6744936c | 671 | |
simon | 0:560a6744936c | 672 | if (fs->fs_type) { /* If the logical drive has been mounted */ |
simon | 0:560a6744936c | 673 | stat = disk_status(fs->drive); |
simon | 0:560a6744936c | 674 | if (!(stat & STA_NOINIT)) { /* and physical drive is kept initialized (has not been changed), */ |
simon | 0:560a6744936c | 675 | #if !_FS_READONLY |
simon | 0:560a6744936c | 676 | if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ |
simon | 0:560a6744936c | 677 | return FR_WRITE_PROTECTED; |
simon | 0:560a6744936c | 678 | #endif |
simon | 0:560a6744936c | 679 | return FR_OK; /* The file system object is valid */ |
simon | 0:560a6744936c | 680 | } |
simon | 0:560a6744936c | 681 | } |
simon | 0:560a6744936c | 682 | |
simon | 0:560a6744936c | 683 | /* The logical drive must be re-mounted. Following code attempts to mount the logical drive */ |
simon | 0:560a6744936c | 684 | |
simon | 0:560a6744936c | 685 | memset(fs, 0, sizeof(FATFS)); /* Clean-up the file system object */ |
simon | 0:560a6744936c | 686 | fs->drive = LD2PD(drv); /* Bind the logical drive and a physical drive */ |
simon | 0:560a6744936c | 687 | stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */ |
simon | 0:560a6744936c | 688 | if (stat & STA_NOINIT) /* Check if the drive is ready */ |
simon | 0:560a6744936c | 689 | return FR_NOT_READY; |
simon | 0:560a6744936c | 690 | #if S_MAX_SIZ > 512 /* Get disk sector size if needed */ |
simon | 0:560a6744936c | 691 | if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK || SS(fs) > S_MAX_SIZ) |
simon | 0:560a6744936c | 692 | return FR_NO_FILESYSTEM; |
simon | 0:560a6744936c | 693 | #endif |
simon | 0:560a6744936c | 694 | #if !_FS_READONLY |
simon | 0:560a6744936c | 695 | if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */ |
simon | 0:560a6744936c | 696 | return FR_WRITE_PROTECTED; |
simon | 0:560a6744936c | 697 | #endif |
simon | 0:560a6744936c | 698 | /* Search FAT partition on the drive */ |
simon | 0:560a6744936c | 699 | fmt = check_fs(fs, bootsect = 0); /* Check sector 0 as an SFD format */ |
simon | 0:560a6744936c | 700 | if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */ |
simon | 0:560a6744936c | 701 | /* Check a partition listed in top of the partition table */ |
simon | 0:560a6744936c | 702 | tbl = &fs->win[MBR_Table + LD2PT(drv) * 16]; /* Partition table */ |
simon | 0:560a6744936c | 703 | if (tbl[4]) { /* Is the partition existing? */ |
simon | 0:560a6744936c | 704 | bootsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */ |
simon | 0:560a6744936c | 705 | fmt = check_fs(fs, bootsect); /* Check the partition */ |
simon | 0:560a6744936c | 706 | } |
simon | 0:560a6744936c | 707 | } |
simon | 0:560a6744936c | 708 | if (fmt || LD_WORD(&fs->win[BPB_BytsPerSec]) != SS(fs)) /* No valid FAT patition is found */ |
simon | 0:560a6744936c | 709 | return FR_NO_FILESYSTEM; |
simon | 0:560a6744936c | 710 | |
simon | 0:560a6744936c | 711 | /* Initialize the file system object */ |
simon | 0:560a6744936c | 712 | fatsize = LD_WORD(&fs->win[BPB_FATSz16]); /* Number of sectors per FAT */ |
simon | 0:560a6744936c | 713 | if (!fatsize) fatsize = LD_DWORD(&fs->win[BPB_FATSz32]); |
simon | 0:560a6744936c | 714 | fs->sects_fat = fatsize; |
simon | 0:560a6744936c | 715 | fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */ |
simon | 0:560a6744936c | 716 | fatsize *= fs->n_fats; /* (Number of sectors in FAT area) */ |
simon | 0:560a6744936c | 717 | fs->fatbase = bootsect + LD_WORD(&fs->win[BPB_RsvdSecCnt]); /* FAT start sector (lba) */ |
simon | 0:560a6744936c | 718 | fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */ |
simon | 0:560a6744936c | 719 | fs->n_rootdir = LD_WORD(&fs->win[BPB_RootEntCnt]); /* Nmuber of root directory entries */ |
simon | 0:560a6744936c | 720 | totalsect = LD_WORD(&fs->win[BPB_TotSec16]); /* Number of sectors on the file system */ |
simon | 0:560a6744936c | 721 | if (!totalsect) totalsect = LD_DWORD(&fs->win[BPB_TotSec32]); |
simon | 0:560a6744936c | 722 | fs->max_clust = maxclust = (totalsect /* max_clust = Last cluster# + 1 */ |
simon | 0:560a6744936c | 723 | - LD_WORD(&fs->win[BPB_RsvdSecCnt]) - fatsize - fs->n_rootdir / (SS(fs)/32) |
simon | 0:560a6744936c | 724 | ) / fs->csize + 2; |
simon | 0:560a6744936c | 725 | |
simon | 0:560a6744936c | 726 | fmt = FS_FAT12; /* Determine the FAT sub type */ |
simon | 0:560a6744936c | 727 | if (maxclust >= 0xFF7) fmt = FS_FAT16; |
simon | 0:560a6744936c | 728 | if (maxclust >= 0xFFF7) fmt = FS_FAT32; |
simon | 0:560a6744936c | 729 | |
simon | 0:560a6744936c | 730 | if (fmt == FS_FAT32) |
simon | 0:560a6744936c | 731 | fs->dirbase = LD_DWORD(&fs->win[BPB_RootClus]); /* Root directory start cluster */ |
simon | 0:560a6744936c | 732 | else |
simon | 0:560a6744936c | 733 | fs->dirbase = fs->fatbase + fatsize; /* Root directory start sector (lba) */ |
simon | 0:560a6744936c | 734 | fs->database = fs->fatbase + fatsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */ |
simon | 0:560a6744936c | 735 | |
simon | 0:560a6744936c | 736 | #if !_FS_READONLY |
simon | 0:560a6744936c | 737 | /* Initialize allocation information */ |
simon | 0:560a6744936c | 738 | fs->free_clust = 0xFFFFFFFF; |
simon | 0:560a6744936c | 739 | #if _USE_FSINFO |
simon | 0:560a6744936c | 740 | /* Get fsinfo if needed */ |
simon | 0:560a6744936c | 741 | if (fmt == FS_FAT32) { |
simon | 0:560a6744936c | 742 | fs->fsi_sector = bootsect + LD_WORD(&fs->win[BPB_FSInfo]); |
simon | 0:560a6744936c | 743 | if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK && |
simon | 0:560a6744936c | 744 | LD_WORD(&fs->win[BS_55AA]) == 0xAA55 && |
simon | 0:560a6744936c | 745 | LD_DWORD(&fs->win[FSI_LeadSig]) == 0x41615252 && |
simon | 0:560a6744936c | 746 | LD_DWORD(&fs->win[FSI_StrucSig]) == 0x61417272) { |
simon | 0:560a6744936c | 747 | fs->last_clust = LD_DWORD(&fs->win[FSI_Nxt_Free]); |
simon | 0:560a6744936c | 748 | fs->free_clust = LD_DWORD(&fs->win[FSI_Free_Count]); |
simon | 0:560a6744936c | 749 | } |
simon | 0:560a6744936c | 750 | } |
simon | 0:560a6744936c | 751 | #endif |
simon | 0:560a6744936c | 752 | #endif |
simon | 0:560a6744936c | 753 | |
simon | 0:560a6744936c | 754 | fs->fs_type = fmt; /* FAT syb-type */ |
simon | 0:560a6744936c | 755 | fs->id = ++fsid; /* File system mount ID */ |
simon | 0:560a6744936c | 756 | return FR_OK; |
simon | 0:560a6744936c | 757 | } |
simon | 0:560a6744936c | 758 | |
simon | 0:560a6744936c | 759 | |
simon | 0:560a6744936c | 760 | |
simon | 0:560a6744936c | 761 | |
simon | 0:560a6744936c | 762 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 763 | /* Check if the file/dir object is valid or not */ |
simon | 0:560a6744936c | 764 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 765 | |
simon | 0:560a6744936c | 766 | static |
simon | 0:560a6744936c | 767 | FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */ |
simon | 0:560a6744936c | 768 | const FATFS *fs, /* Pointer to the file system object */ |
simon | 0:560a6744936c | 769 | WORD id /* Member id of the target object to be checked */ |
simon | 0:560a6744936c | 770 | ) |
simon | 0:560a6744936c | 771 | { |
simon | 0:560a6744936c | 772 | if (!fs || !fs->fs_type || fs->id != id) |
simon | 0:560a6744936c | 773 | return FR_INVALID_OBJECT; |
simon | 0:560a6744936c | 774 | if (disk_status(fs->drive) & STA_NOINIT) |
simon | 0:560a6744936c | 775 | return FR_NOT_READY; |
simon | 0:560a6744936c | 776 | |
simon | 0:560a6744936c | 777 | return FR_OK; |
simon | 0:560a6744936c | 778 | } |
simon | 0:560a6744936c | 779 | |
simon | 0:560a6744936c | 780 | |
simon | 0:560a6744936c | 781 | |
simon | 0:560a6744936c | 782 | |
simon | 0:560a6744936c | 783 | /*-------------------------------------------------------------------------- |
simon | 0:560a6744936c | 784 | |
simon | 0:560a6744936c | 785 | Public Functions |
simon | 0:560a6744936c | 786 | |
simon | 0:560a6744936c | 787 | --------------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 788 | |
simon | 0:560a6744936c | 789 | |
simon | 0:560a6744936c | 790 | |
simon | 0:560a6744936c | 791 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 792 | /* Mount/Unmount a Locical Drive */ |
simon | 0:560a6744936c | 793 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 794 | |
simon | 0:560a6744936c | 795 | FRESULT f_mount ( |
simon | 0:560a6744936c | 796 | BYTE drv, /* Logical drive number to be mounted/unmounted */ |
simon | 0:560a6744936c | 797 | FATFS *fs /* Pointer to new file system object (NULL for unmount)*/ |
simon | 0:560a6744936c | 798 | ) |
simon | 0:560a6744936c | 799 | { |
simon | 0:560a6744936c | 800 | if (drv >= _DRIVES) return FR_INVALID_DRIVE; |
simon | 0:560a6744936c | 801 | |
simon | 0:560a6744936c | 802 | if (FatFs[drv]) FatFs[drv]->fs_type = 0; /* Clear old object */ |
simon | 0:560a6744936c | 803 | |
simon | 0:560a6744936c | 804 | FatFs[drv] = fs; /* Register and clear new object */ |
simon | 0:560a6744936c | 805 | if (fs) fs->fs_type = 0; |
simon | 0:560a6744936c | 806 | |
simon | 0:560a6744936c | 807 | return FR_OK; |
simon | 0:560a6744936c | 808 | } |
simon | 0:560a6744936c | 809 | |
simon | 0:560a6744936c | 810 | |
simon | 0:560a6744936c | 811 | |
simon | 0:560a6744936c | 812 | |
simon | 0:560a6744936c | 813 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 814 | /* Open or Create a File */ |
simon | 0:560a6744936c | 815 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 816 | |
simon | 0:560a6744936c | 817 | FRESULT f_open ( |
simon | 0:560a6744936c | 818 | FIL *fp, /* Pointer to the blank file object */ |
simon | 0:560a6744936c | 819 | const char *path, /* Pointer to the file name */ |
simon | 0:560a6744936c | 820 | BYTE mode /* Access mode and file open mode flags */ |
simon | 0:560a6744936c | 821 | ) |
simon | 0:560a6744936c | 822 | { |
simon | 0:560a6744936c | 823 | FRESULT res; |
simon | 0:560a6744936c | 824 | FATFS_DIR dj; |
simon | 0:560a6744936c | 825 | BYTE *dir; |
simon | 0:560a6744936c | 826 | char fn[8+3+1]; |
simon | 0:560a6744936c | 827 | |
simon | 0:560a6744936c | 828 | |
simon | 0:560a6744936c | 829 | fp->fs = NULL; /* Clear file object */ |
simon | 0:560a6744936c | 830 | #if !_FS_READONLY |
simon | 0:560a6744936c | 831 | mode &= (FA_READ|FA_WRITE|FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW); |
simon | 0:560a6744936c | 832 | res = auto_mount(&path, &dj.fs, (BYTE)(mode & (FA_WRITE|FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW))); |
simon | 0:560a6744936c | 833 | #else |
simon | 0:560a6744936c | 834 | mode &= FA_READ; |
simon | 0:560a6744936c | 835 | res = auto_mount(&path, &dj.fs, 0); |
simon | 0:560a6744936c | 836 | #endif |
simon | 0:560a6744936c | 837 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 838 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 839 | |
simon | 0:560a6744936c | 840 | #if !_FS_READONLY |
simon | 0:560a6744936c | 841 | /* Create or Open a file */ |
simon | 0:560a6744936c | 842 | if (mode & (FA_CREATE_ALWAYS|FA_OPEN_ALWAYS|FA_CREATE_NEW)) { |
simon | 0:560a6744936c | 843 | DWORD ps, rs; |
simon | 0:560a6744936c | 844 | if (res != FR_OK) { /* No file, create new */ |
simon | 0:560a6744936c | 845 | if (res != FR_NO_FILE) return res; |
simon | 0:560a6744936c | 846 | res = reserve_direntry(&dj, &dir); |
simon | 0:560a6744936c | 847 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 848 | memset(dir, 0, 32); /* Initialize the new entry with open name */ |
simon | 0:560a6744936c | 849 | memcpy(&dir[DIR_Name], fn, 8+3); |
simon | 0:560a6744936c | 850 | dir[DIR_NTres] = fn[11]; |
simon | 0:560a6744936c | 851 | mode |= FA_CREATE_ALWAYS; |
simon | 0:560a6744936c | 852 | } |
simon | 0:560a6744936c | 853 | else { /* Any object is already existing */ |
simon | 0:560a6744936c | 854 | if (mode & FA_CREATE_NEW) /* Cannot create new */ |
simon | 0:560a6744936c | 855 | return FR_EXIST; |
simon | 0:560a6744936c | 856 | if (!dir || (dir[DIR_Attr] & (AM_RDO|AM_DIR))) /* Cannot overwrite it (R/O or DIR) */ |
simon | 0:560a6744936c | 857 | return FR_DENIED; |
simon | 0:560a6744936c | 858 | if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero if needed */ |
simon | 0:560a6744936c | 859 | rs = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]); /* Get start cluster */ |
simon | 0:560a6744936c | 860 | ST_WORD(&dir[DIR_FstClusHI], 0); /* cluster = 0 */ |
simon | 0:560a6744936c | 861 | ST_WORD(&dir[DIR_FstClusLO], 0); |
simon | 0:560a6744936c | 862 | ST_DWORD(&dir[DIR_FileSize], 0); /* size = 0 */ |
simon | 0:560a6744936c | 863 | dj.fs->winflag = 1; |
simon | 0:560a6744936c | 864 | ps = dj.fs->winsect; /* Remove the cluster chain */ |
simon | 0:560a6744936c | 865 | if (!remove_chain(dj.fs, rs) || !move_window(dj.fs, ps)) |
simon | 0:560a6744936c | 866 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 867 | dj.fs->last_clust = rs - 1; /* Reuse the cluster hole */ |
simon | 0:560a6744936c | 868 | } |
simon | 0:560a6744936c | 869 | } |
simon | 0:560a6744936c | 870 | if (mode & FA_CREATE_ALWAYS) { |
simon | 0:560a6744936c | 871 | dir[DIR_Attr] = 0; /* Reset attribute */ |
simon | 0:560a6744936c | 872 | ps = get_fattime(); |
simon | 0:560a6744936c | 873 | ST_DWORD(&dir[DIR_CrtTime], ps); /* Created time */ |
simon | 0:560a6744936c | 874 | dj.fs->winflag = 1; |
simon | 0:560a6744936c | 875 | mode |= FA__WRITTEN; /* Set file changed flag */ |
simon | 0:560a6744936c | 876 | } |
simon | 0:560a6744936c | 877 | } |
simon | 0:560a6744936c | 878 | /* Open an existing file */ |
simon | 0:560a6744936c | 879 | else { |
simon | 0:560a6744936c | 880 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 881 | if (res != FR_OK) return res; /* Trace failed */ |
simon | 0:560a6744936c | 882 | if (!dir || (dir[DIR_Attr] & AM_DIR)) /* It is a directory */ |
simon | 0:560a6744936c | 883 | return FR_NO_FILE; |
simon | 0:560a6744936c | 884 | #if !_FS_READONLY |
simon | 0:560a6744936c | 885 | if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */ |
simon | 0:560a6744936c | 886 | return FR_DENIED; |
simon | 0:560a6744936c | 887 | } |
simon | 0:560a6744936c | 888 | fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */ |
simon | 0:560a6744936c | 889 | fp->dir_ptr = dir; |
simon | 0:560a6744936c | 890 | #endif |
simon | 0:560a6744936c | 891 | fp->flag = mode; /* File access mode */ |
simon | 0:560a6744936c | 892 | fp->org_clust = /* File start cluster */ |
simon | 0:560a6744936c | 893 | ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]); |
simon | 0:560a6744936c | 894 | fp->fsize = LD_DWORD(&dir[DIR_FileSize]); /* File size */ |
simon | 0:560a6744936c | 895 | fp->fptr = 0; fp->csect = 255; /* File pointer */ |
simon | 0:560a6744936c | 896 | fp->curr_sect = 0; |
simon | 0:560a6744936c | 897 | fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */ |
simon | 0:560a6744936c | 898 | |
simon | 0:560a6744936c | 899 | return FR_OK; |
simon | 0:560a6744936c | 900 | } |
simon | 0:560a6744936c | 901 | |
simon | 0:560a6744936c | 902 | |
simon | 0:560a6744936c | 903 | |
simon | 0:560a6744936c | 904 | |
simon | 0:560a6744936c | 905 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 906 | /* Read File */ |
simon | 0:560a6744936c | 907 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 908 | |
simon | 0:560a6744936c | 909 | FRESULT f_read ( |
simon | 0:560a6744936c | 910 | FIL *fp, /* Pointer to the file object */ |
simon | 0:560a6744936c | 911 | void *buff, /* Pointer to data buffer */ |
simon | 0:560a6744936c | 912 | UINT btr, /* Number of bytes to read */ |
simon | 0:560a6744936c | 913 | UINT *br /* Pointer to number of bytes read */ |
simon | 0:560a6744936c | 914 | ) |
simon | 0:560a6744936c | 915 | { |
simon | 0:560a6744936c | 916 | FRESULT res; |
simon | 0:560a6744936c | 917 | DWORD clust, sect, remain; |
simon | 0:560a6744936c | 918 | UINT rcnt, cc; |
simon | 0:560a6744936c | 919 | BYTE *rbuff = (BYTE*)buff; |
simon | 0:560a6744936c | 920 | |
simon | 0:560a6744936c | 921 | |
simon | 0:560a6744936c | 922 | *br = 0; |
simon | 0:560a6744936c | 923 | res = validate(fp->fs, fp->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 924 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 925 | if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */ |
simon | 0:560a6744936c | 926 | if (!(fp->flag & FA_READ)) return FR_DENIED; /* Check access mode */ |
simon | 0:560a6744936c | 927 | remain = fp->fsize - fp->fptr; |
simon | 0:560a6744936c | 928 | if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ |
simon | 0:560a6744936c | 929 | |
simon | 0:560a6744936c | 930 | for ( ; btr; /* Repeat until all data transferred */ |
simon | 0:560a6744936c | 931 | rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) { |
simon | 0:560a6744936c | 932 | if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ |
simon | 0:560a6744936c | 933 | if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */ |
simon | 0:560a6744936c | 934 | clust = (fp->fptr == 0) ? /* On the top of the file? */ |
simon | 0:560a6744936c | 935 | fp->org_clust : get_cluster(fp->fs, fp->curr_clust); |
simon | 0:560a6744936c | 936 | if (clust < 2 || clust >= fp->fs->max_clust) goto fr_error; |
simon | 0:560a6744936c | 937 | fp->curr_clust = clust; /* Update current cluster */ |
simon | 0:560a6744936c | 938 | fp->csect = 0; /* Reset sector address in the cluster */ |
simon | 0:560a6744936c | 939 | } |
simon | 0:560a6744936c | 940 | sect = clust2sect(fp->fs, fp->curr_clust) + fp->csect; /* Get current sector */ |
simon | 0:560a6744936c | 941 | cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */ |
simon | 0:560a6744936c | 942 | if (cc) { /* Read maximum contiguous sectors directly */ |
simon | 0:560a6744936c | 943 | if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */ |
simon | 0:560a6744936c | 944 | cc = fp->fs->csize - fp->csect; |
simon | 0:560a6744936c | 945 | if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK) |
simon | 0:560a6744936c | 946 | goto fr_error; |
simon | 0:560a6744936c | 947 | fp->csect += (BYTE)cc; /* Next sector address in the cluster */ |
simon | 0:560a6744936c | 948 | rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ |
simon | 0:560a6744936c | 949 | continue; |
simon | 0:560a6744936c | 950 | } |
simon | 0:560a6744936c | 951 | if (sect != fp->curr_sect) { /* Is window offset changed? */ |
simon | 0:560a6744936c | 952 | #if !_FS_READONLY |
simon | 0:560a6744936c | 953 | if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer if needed */ |
simon | 0:560a6744936c | 954 | if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK) |
simon | 0:560a6744936c | 955 | goto fr_error; |
simon | 0:560a6744936c | 956 | fp->flag &= (BYTE)~FA__DIRTY; |
simon | 0:560a6744936c | 957 | } |
simon | 0:560a6744936c | 958 | #endif |
simon | 0:560a6744936c | 959 | if (disk_read(fp->fs->drive, fp->buffer, sect, 1) != RES_OK) /* Fill file I/O buffer with file data */ |
simon | 0:560a6744936c | 960 | goto fr_error; |
simon | 0:560a6744936c | 961 | fp->curr_sect = sect; |
simon | 0:560a6744936c | 962 | } |
simon | 0:560a6744936c | 963 | fp->csect++; /* Next sector address in the cluster */ |
simon | 0:560a6744936c | 964 | } |
simon | 0:560a6744936c | 965 | rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector from file I/O buffer */ |
simon | 0:560a6744936c | 966 | if (rcnt > btr) rcnt = btr; |
simon | 0:560a6744936c | 967 | memcpy(rbuff, &fp->buffer[fp->fptr % SS(fp->fs)], rcnt); |
simon | 0:560a6744936c | 968 | } |
simon | 0:560a6744936c | 969 | |
simon | 0:560a6744936c | 970 | return FR_OK; |
simon | 0:560a6744936c | 971 | |
simon | 0:560a6744936c | 972 | fr_error: /* Abort this file due to an unrecoverable error */ |
simon | 0:560a6744936c | 973 | fp->flag |= FA__ERROR; |
simon | 0:560a6744936c | 974 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 975 | } |
simon | 0:560a6744936c | 976 | |
simon | 0:560a6744936c | 977 | |
simon | 0:560a6744936c | 978 | |
simon | 0:560a6744936c | 979 | |
simon | 0:560a6744936c | 980 | #if !_FS_READONLY |
simon | 0:560a6744936c | 981 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 982 | /* Write File */ |
simon | 0:560a6744936c | 983 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 984 | |
simon | 0:560a6744936c | 985 | FRESULT f_write ( |
simon | 0:560a6744936c | 986 | FIL *fp, /* Pointer to the file object */ |
simon | 0:560a6744936c | 987 | const void *buff, /* Pointer to the data to be written */ |
simon | 0:560a6744936c | 988 | UINT btw, /* Number of bytes to write */ |
simon | 0:560a6744936c | 989 | UINT *bw /* Pointer to number of bytes written */ |
simon | 0:560a6744936c | 990 | ) |
simon | 0:560a6744936c | 991 | { |
simon | 0:560a6744936c | 992 | FRESULT res; |
simon | 0:560a6744936c | 993 | DWORD clust, sect; |
simon | 0:560a6744936c | 994 | UINT wcnt, cc; |
simon | 0:560a6744936c | 995 | const BYTE *wbuff = (const BYTE*)buff; |
simon | 0:560a6744936c | 996 | |
simon | 0:560a6744936c | 997 | |
simon | 0:560a6744936c | 998 | *bw = 0; |
simon | 0:560a6744936c | 999 | res = validate(fp->fs, fp->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 1000 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1001 | if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */ |
simon | 0:560a6744936c | 1002 | if (!(fp->flag & FA_WRITE)) return FR_DENIED; /* Check access mode */ |
simon | 0:560a6744936c | 1003 | if (fp->fsize + btw < fp->fsize) return FR_OK; /* File size cannot reach 4GB */ |
simon | 0:560a6744936c | 1004 | |
simon | 0:560a6744936c | 1005 | for ( ; btw; /* Repeat until all data transferred */ |
simon | 0:560a6744936c | 1006 | wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) { |
simon | 0:560a6744936c | 1007 | if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */ |
simon | 0:560a6744936c | 1008 | if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */ |
simon | 0:560a6744936c | 1009 | if (fp->fptr == 0) { /* On the top of the file? */ |
simon | 0:560a6744936c | 1010 | clust = fp->org_clust; /* Follow from the origin */ |
simon | 0:560a6744936c | 1011 | if (clust == 0) /* When there is no cluster chain, */ |
simon | 0:560a6744936c | 1012 | fp->org_clust = clust = create_chain(fp->fs, 0); /* Create a new cluster chain */ |
simon | 0:560a6744936c | 1013 | } else { /* Middle or end of the file */ |
simon | 0:560a6744936c | 1014 | clust = create_chain(fp->fs, fp->curr_clust); /* Trace or streach cluster chain */ |
simon | 0:560a6744936c | 1015 | } |
simon | 0:560a6744936c | 1016 | if (clust == 0) break; /* Could not allocate a new cluster (disk full) */ |
simon | 0:560a6744936c | 1017 | if (clust == 1 || clust >= fp->fs->max_clust) goto fw_error; |
simon | 0:560a6744936c | 1018 | fp->curr_clust = clust; /* Update current cluster */ |
simon | 0:560a6744936c | 1019 | fp->csect = 0; /* Reset sector address in the cluster */ |
simon | 0:560a6744936c | 1020 | } |
simon | 0:560a6744936c | 1021 | sect = clust2sect(fp->fs, fp->curr_clust) + fp->csect; /* Get current sector */ |
simon | 0:560a6744936c | 1022 | cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */ |
simon | 0:560a6744936c | 1023 | if (cc) { /* Write maximum contiguous sectors directly */ |
simon | 0:560a6744936c | 1024 | if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */ |
simon | 0:560a6744936c | 1025 | cc = fp->fs->csize - fp->csect; |
simon | 0:560a6744936c | 1026 | if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK) |
simon | 0:560a6744936c | 1027 | goto fw_error; |
simon | 0:560a6744936c | 1028 | fp->csect += (BYTE)cc; /* Next sector address in the cluster */ |
simon | 0:560a6744936c | 1029 | wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */ |
simon | 0:560a6744936c | 1030 | continue; |
simon | 0:560a6744936c | 1031 | } |
simon | 0:560a6744936c | 1032 | if (sect != fp->curr_sect) { /* Is window offset changed? */ |
simon | 0:560a6744936c | 1033 | if (fp->flag & FA__DIRTY) { /* Write back file I/O buffer if needed */ |
simon | 0:560a6744936c | 1034 | if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK) |
simon | 0:560a6744936c | 1035 | goto fw_error; |
simon | 0:560a6744936c | 1036 | fp->flag &= (BYTE)~FA__DIRTY; |
simon | 0:560a6744936c | 1037 | } |
simon | 0:560a6744936c | 1038 | if (fp->fptr < fp->fsize && /* Fill file I/O buffer with file data */ |
simon | 0:560a6744936c | 1039 | disk_read(fp->fs->drive, fp->buffer, sect, 1) != RES_OK) |
simon | 0:560a6744936c | 1040 | goto fw_error; |
simon | 0:560a6744936c | 1041 | fp->curr_sect = sect; |
simon | 0:560a6744936c | 1042 | } |
simon | 0:560a6744936c | 1043 | fp->csect++; /* Next sector address in the cluster */ |
simon | 0:560a6744936c | 1044 | } |
simon | 0:560a6744936c | 1045 | wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */ |
simon | 0:560a6744936c | 1046 | if (wcnt > btw) wcnt = btw; |
simon | 0:560a6744936c | 1047 | memcpy(&fp->buffer[fp->fptr % SS(fp->fs)], wbuff, wcnt); |
simon | 0:560a6744936c | 1048 | fp->flag |= FA__DIRTY; |
simon | 0:560a6744936c | 1049 | } |
simon | 0:560a6744936c | 1050 | |
simon | 0:560a6744936c | 1051 | if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */ |
simon | 0:560a6744936c | 1052 | fp->flag |= FA__WRITTEN; /* Set file changed flag */ |
simon | 0:560a6744936c | 1053 | return FR_OK; |
simon | 0:560a6744936c | 1054 | |
simon | 0:560a6744936c | 1055 | fw_error: /* Abort this file due to an unrecoverable error */ |
simon | 0:560a6744936c | 1056 | fp->flag |= FA__ERROR; |
simon | 0:560a6744936c | 1057 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1058 | } |
simon | 0:560a6744936c | 1059 | |
simon | 0:560a6744936c | 1060 | |
simon | 0:560a6744936c | 1061 | |
simon | 0:560a6744936c | 1062 | |
simon | 0:560a6744936c | 1063 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1064 | /* Synchronize the file object */ |
simon | 0:560a6744936c | 1065 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1066 | |
simon | 0:560a6744936c | 1067 | FRESULT f_sync ( |
simon | 0:560a6744936c | 1068 | FIL *fp /* Pointer to the file object */ |
simon | 0:560a6744936c | 1069 | ) |
simon | 0:560a6744936c | 1070 | { |
simon | 0:560a6744936c | 1071 | FRESULT res; |
simon | 0:560a6744936c | 1072 | DWORD tim; |
simon | 0:560a6744936c | 1073 | BYTE *dir; |
simon | 0:560a6744936c | 1074 | |
simon | 0:560a6744936c | 1075 | |
simon | 0:560a6744936c | 1076 | res = validate(fp->fs, fp->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 1077 | if (res == FR_OK) { |
simon | 0:560a6744936c | 1078 | if (fp->flag & FA__WRITTEN) { /* Has the file been written? */ |
simon | 0:560a6744936c | 1079 | /* Write back data buffer if needed */ |
simon | 0:560a6744936c | 1080 | if (fp->flag & FA__DIRTY) { |
simon | 0:560a6744936c | 1081 | if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK) |
simon | 0:560a6744936c | 1082 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1083 | fp->flag &= (BYTE)~FA__DIRTY; |
simon | 0:560a6744936c | 1084 | } |
simon | 0:560a6744936c | 1085 | /* Update the directory entry */ |
simon | 0:560a6744936c | 1086 | if (!move_window(fp->fs, fp->dir_sect)) |
simon | 0:560a6744936c | 1087 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1088 | dir = fp->dir_ptr; |
simon | 0:560a6744936c | 1089 | dir[DIR_Attr] |= AM_ARC; /* Set archive bit */ |
simon | 0:560a6744936c | 1090 | ST_DWORD(&dir[DIR_FileSize], fp->fsize); /* Update file size */ |
simon | 0:560a6744936c | 1091 | ST_WORD(&dir[DIR_FstClusLO], fp->org_clust); /* Update start cluster */ |
simon | 0:560a6744936c | 1092 | ST_WORD(&dir[DIR_FstClusHI], fp->org_clust >> 16); |
simon | 0:560a6744936c | 1093 | tim = get_fattime(); /* Updated time */ |
simon | 0:560a6744936c | 1094 | ST_DWORD(&dir[DIR_WrtTime], tim); |
simon | 0:560a6744936c | 1095 | fp->flag &= (BYTE)~FA__WRITTEN; |
simon | 0:560a6744936c | 1096 | res = sync(fp->fs); |
simon | 0:560a6744936c | 1097 | } |
simon | 0:560a6744936c | 1098 | } |
simon | 0:560a6744936c | 1099 | return res; |
simon | 0:560a6744936c | 1100 | } |
simon | 0:560a6744936c | 1101 | |
simon | 0:560a6744936c | 1102 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 1103 | |
simon | 0:560a6744936c | 1104 | |
simon | 0:560a6744936c | 1105 | |
simon | 0:560a6744936c | 1106 | |
simon | 0:560a6744936c | 1107 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1108 | /* Close File */ |
simon | 0:560a6744936c | 1109 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1110 | |
simon | 0:560a6744936c | 1111 | FRESULT f_close ( |
simon | 0:560a6744936c | 1112 | FIL *fp /* Pointer to the file object to be closed */ |
simon | 0:560a6744936c | 1113 | ) |
simon | 0:560a6744936c | 1114 | { |
simon | 0:560a6744936c | 1115 | FRESULT res; |
simon | 0:560a6744936c | 1116 | |
simon | 0:560a6744936c | 1117 | |
simon | 0:560a6744936c | 1118 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1119 | res = f_sync(fp); |
simon | 0:560a6744936c | 1120 | #else |
simon | 0:560a6744936c | 1121 | res = validate(fp->fs, fp->id); |
simon | 0:560a6744936c | 1122 | #endif |
simon | 0:560a6744936c | 1123 | if (res == FR_OK) fp->fs = NULL; |
simon | 0:560a6744936c | 1124 | return res; |
simon | 0:560a6744936c | 1125 | } |
simon | 0:560a6744936c | 1126 | |
simon | 0:560a6744936c | 1127 | |
simon | 0:560a6744936c | 1128 | |
simon | 0:560a6744936c | 1129 | |
simon | 0:560a6744936c | 1130 | #if _FS_MINIMIZE <= 2 |
simon | 0:560a6744936c | 1131 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1132 | /* Seek File R/W Pointer */ |
simon | 0:560a6744936c | 1133 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1134 | |
simon | 0:560a6744936c | 1135 | FRESULT f_lseek ( |
simon | 0:560a6744936c | 1136 | FIL *fp, /* Pointer to the file object */ |
simon | 0:560a6744936c | 1137 | DWORD ofs /* File pointer from top of file */ |
simon | 0:560a6744936c | 1138 | ) |
simon | 0:560a6744936c | 1139 | { |
simon | 0:560a6744936c | 1140 | FRESULT res; |
simon | 0:560a6744936c | 1141 | DWORD clust, csize, nsect, ifptr; |
simon | 0:560a6744936c | 1142 | |
simon | 0:560a6744936c | 1143 | |
simon | 0:560a6744936c | 1144 | res = validate(fp->fs, fp->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 1145 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1146 | if (fp->flag & FA__ERROR) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1147 | if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */ |
simon | 0:560a6744936c | 1148 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1149 | && !(fp->flag & FA_WRITE) |
simon | 0:560a6744936c | 1150 | #endif |
simon | 0:560a6744936c | 1151 | ) ofs = fp->fsize; |
simon | 0:560a6744936c | 1152 | |
simon | 0:560a6744936c | 1153 | ifptr = fp->fptr; |
simon | 0:560a6744936c | 1154 | fp->fptr = 0; fp->csect = 255; |
simon | 0:560a6744936c | 1155 | nsect = 0; |
simon | 0:560a6744936c | 1156 | if (ofs > 0) { |
simon | 0:560a6744936c | 1157 | csize = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */ |
simon | 0:560a6744936c | 1158 | if (ifptr > 0 && |
simon | 0:560a6744936c | 1159 | (ofs - 1) / csize >= (ifptr - 1) / csize) {/* When seek to same or following cluster, */ |
simon | 0:560a6744936c | 1160 | fp->fptr = (ifptr - 1) & ~(csize - 1); /* start from the current cluster */ |
simon | 0:560a6744936c | 1161 | ofs -= fp->fptr; |
simon | 0:560a6744936c | 1162 | clust = fp->curr_clust; |
simon | 0:560a6744936c | 1163 | } else { /* When seek to back cluster, */ |
simon | 0:560a6744936c | 1164 | clust = fp->org_clust; /* start from the first cluster */ |
simon | 0:560a6744936c | 1165 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1166 | if (clust == 0) { /* If no cluster chain, create a new chain */ |
simon | 0:560a6744936c | 1167 | clust = create_chain(fp->fs, 0); |
simon | 0:560a6744936c | 1168 | if (clust == 1) goto fk_error; |
simon | 0:560a6744936c | 1169 | fp->org_clust = clust; |
simon | 0:560a6744936c | 1170 | } |
simon | 0:560a6744936c | 1171 | #endif |
simon | 0:560a6744936c | 1172 | fp->curr_clust = clust; |
simon | 0:560a6744936c | 1173 | } |
simon | 0:560a6744936c | 1174 | if (clust != 0) { |
simon | 0:560a6744936c | 1175 | while (ofs > csize) { /* Cluster following loop */ |
simon | 0:560a6744936c | 1176 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1177 | if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ |
simon | 0:560a6744936c | 1178 | clust = create_chain(fp->fs, clust); /* Force streached if in write mode */ |
simon | 0:560a6744936c | 1179 | if (clust == 0) { /* When disk gets full, clip file size */ |
simon | 0:560a6744936c | 1180 | ofs = csize; break; |
simon | 0:560a6744936c | 1181 | } |
simon | 0:560a6744936c | 1182 | } else |
simon | 0:560a6744936c | 1183 | #endif |
simon | 0:560a6744936c | 1184 | clust = get_cluster(fp->fs, clust); /* Follow cluster chain if not in write mode */ |
simon | 0:560a6744936c | 1185 | if (clust < 2 || clust >= fp->fs->max_clust) goto fk_error; |
simon | 0:560a6744936c | 1186 | fp->curr_clust = clust; |
simon | 0:560a6744936c | 1187 | fp->fptr += csize; |
simon | 0:560a6744936c | 1188 | ofs -= csize; |
simon | 0:560a6744936c | 1189 | } |
simon | 0:560a6744936c | 1190 | fp->fptr += ofs; |
simon | 0:560a6744936c | 1191 | fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */ |
simon | 0:560a6744936c | 1192 | if (ofs & (SS(fp->fs) - 1)) { |
simon | 0:560a6744936c | 1193 | nsect = clust2sect(fp->fs, clust) + fp->csect; /* Current sector */ |
simon | 0:560a6744936c | 1194 | fp->csect++; |
simon | 0:560a6744936c | 1195 | } |
simon | 0:560a6744936c | 1196 | } |
simon | 0:560a6744936c | 1197 | } |
simon | 0:560a6744936c | 1198 | if (nsect && nsect != fp->curr_sect) { |
simon | 0:560a6744936c | 1199 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1200 | if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */ |
simon | 0:560a6744936c | 1201 | if (disk_write(fp->fs->drive, fp->buffer, fp->curr_sect, 1) != RES_OK) |
simon | 0:560a6744936c | 1202 | goto fk_error; |
simon | 0:560a6744936c | 1203 | fp->flag &= (BYTE)~FA__DIRTY; |
simon | 0:560a6744936c | 1204 | } |
simon | 0:560a6744936c | 1205 | #endif |
simon | 0:560a6744936c | 1206 | if (disk_read(fp->fs->drive, fp->buffer, nsect, 1) != RES_OK) |
simon | 0:560a6744936c | 1207 | goto fk_error; |
simon | 0:560a6744936c | 1208 | fp->curr_sect = nsect; |
simon | 0:560a6744936c | 1209 | } |
simon | 0:560a6744936c | 1210 | |
simon | 0:560a6744936c | 1211 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1212 | if (fp->fptr > fp->fsize) { /* Set changed flag if the file was extended */ |
simon | 0:560a6744936c | 1213 | fp->fsize = fp->fptr; |
simon | 0:560a6744936c | 1214 | fp->flag |= FA__WRITTEN; |
simon | 0:560a6744936c | 1215 | } |
simon | 0:560a6744936c | 1216 | #endif |
simon | 0:560a6744936c | 1217 | |
simon | 0:560a6744936c | 1218 | return FR_OK; |
simon | 0:560a6744936c | 1219 | |
simon | 0:560a6744936c | 1220 | fk_error: /* Abort this file due to an unrecoverable error */ |
simon | 0:560a6744936c | 1221 | fp->flag |= FA__ERROR; |
simon | 0:560a6744936c | 1222 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1223 | } |
simon | 0:560a6744936c | 1224 | |
simon | 0:560a6744936c | 1225 | |
simon | 0:560a6744936c | 1226 | |
simon | 0:560a6744936c | 1227 | |
simon | 0:560a6744936c | 1228 | #if _FS_MINIMIZE <= 1 |
simon | 0:560a6744936c | 1229 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1230 | /* Create a directroy object */ |
simon | 0:560a6744936c | 1231 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1232 | |
simon | 0:560a6744936c | 1233 | FRESULT f_opendir ( |
simon | 0:560a6744936c | 1234 | FATFS_DIR *dj, /* Pointer to directory object to create */ |
simon | 0:560a6744936c | 1235 | const char *path /* Pointer to the directory path */ |
simon | 0:560a6744936c | 1236 | ) |
simon | 0:560a6744936c | 1237 | { |
simon | 0:560a6744936c | 1238 | FRESULT res; |
simon | 0:560a6744936c | 1239 | BYTE *dir; |
simon | 0:560a6744936c | 1240 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1241 | |
simon | 0:560a6744936c | 1242 | |
simon | 0:560a6744936c | 1243 | res = auto_mount(&path, &dj->fs, 0); |
simon | 0:560a6744936c | 1244 | if (res == FR_OK) { |
simon | 0:560a6744936c | 1245 | res = trace_path(dj, fn, path, &dir); /* Trace the directory path */ |
simon | 0:560a6744936c | 1246 | if (res == FR_OK) { /* Trace completed */ |
simon | 0:560a6744936c | 1247 | if (dir) { /* It is not the root dir */ |
simon | 0:560a6744936c | 1248 | if (dir[DIR_Attr] & AM_DIR) { /* The entry is a directory */ |
simon | 0:560a6744936c | 1249 | dj->clust = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]); |
simon | 0:560a6744936c | 1250 | dj->sect = clust2sect(dj->fs, dj->clust); |
simon | 0:560a6744936c | 1251 | dj->index = 2; |
simon | 0:560a6744936c | 1252 | } else { /* The entry is not a directory */ |
simon | 0:560a6744936c | 1253 | res = FR_NO_FILE; |
simon | 0:560a6744936c | 1254 | } |
simon | 0:560a6744936c | 1255 | } |
simon | 0:560a6744936c | 1256 | dj->id = dj->fs->id; |
simon | 0:560a6744936c | 1257 | } |
simon | 0:560a6744936c | 1258 | } |
simon | 0:560a6744936c | 1259 | |
simon | 0:560a6744936c | 1260 | return res; |
simon | 0:560a6744936c | 1261 | } |
simon | 0:560a6744936c | 1262 | |
simon | 0:560a6744936c | 1263 | |
simon | 0:560a6744936c | 1264 | |
simon | 0:560a6744936c | 1265 | |
simon | 0:560a6744936c | 1266 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1267 | /* Read Directory Entry in Sequense */ |
simon | 0:560a6744936c | 1268 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1269 | |
simon | 0:560a6744936c | 1270 | FRESULT f_readdir ( |
simon | 0:560a6744936c | 1271 | FATFS_DIR *dj, /* Pointer to the directory object */ |
simon | 0:560a6744936c | 1272 | FILINFO *finfo /* Pointer to file information to return */ |
simon | 0:560a6744936c | 1273 | ) |
simon | 0:560a6744936c | 1274 | { |
simon | 0:560a6744936c | 1275 | BYTE *dir, c; |
simon | 0:560a6744936c | 1276 | FRESULT res; |
simon | 0:560a6744936c | 1277 | |
simon | 0:560a6744936c | 1278 | res = validate(dj->fs, dj->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 1279 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1280 | |
simon | 0:560a6744936c | 1281 | finfo->fname[0] = 0; |
simon | 0:560a6744936c | 1282 | while (dj->sect) { |
simon | 0:560a6744936c | 1283 | if (!move_window(dj->fs, dj->sect)) |
simon | 0:560a6744936c | 1284 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1285 | dir = &dj->fs->win[(dj->index & ((SS(dj->fs) - 1) >> 5)) * 32]; /* pointer to the directory entry */ |
simon | 0:560a6744936c | 1286 | c = dir[DIR_Name]; |
simon | 0:560a6744936c | 1287 | if (c == 0) break; /* Has it reached to end of dir? */ |
simon | 0:560a6744936c | 1288 | if (c != 0xE5 && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */ |
simon | 0:560a6744936c | 1289 | get_fileinfo(finfo, dir); |
simon | 0:560a6744936c | 1290 | if (!next_dir_entry(dj)) dj->sect = 0; /* Next entry */ |
simon | 0:560a6744936c | 1291 | if (finfo->fname[0]) break; /* Found valid entry */ |
simon | 0:560a6744936c | 1292 | } |
simon | 0:560a6744936c | 1293 | |
simon | 0:560a6744936c | 1294 | return FR_OK; |
simon | 0:560a6744936c | 1295 | } |
simon | 0:560a6744936c | 1296 | |
simon | 0:560a6744936c | 1297 | |
simon | 0:560a6744936c | 1298 | |
simon | 0:560a6744936c | 1299 | |
simon | 0:560a6744936c | 1300 | #if _FS_MINIMIZE == 0 |
simon | 0:560a6744936c | 1301 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1302 | /* Get File Status */ |
simon | 0:560a6744936c | 1303 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1304 | |
simon | 0:560a6744936c | 1305 | FRESULT f_stat ( |
simon | 0:560a6744936c | 1306 | const char *path, /* Pointer to the file path */ |
simon | 0:560a6744936c | 1307 | FILINFO *finfo /* Pointer to file information to return */ |
simon | 0:560a6744936c | 1308 | ) |
simon | 0:560a6744936c | 1309 | { |
simon | 0:560a6744936c | 1310 | FRESULT res; |
simon | 0:560a6744936c | 1311 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1312 | BYTE *dir; |
simon | 0:560a6744936c | 1313 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1314 | |
simon | 0:560a6744936c | 1315 | |
simon | 0:560a6744936c | 1316 | res = auto_mount(&path, &dj.fs, 0); |
simon | 0:560a6744936c | 1317 | if (res == FR_OK) { |
simon | 0:560a6744936c | 1318 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 1319 | if (res == FR_OK) { /* Trace completed */ |
simon | 0:560a6744936c | 1320 | if (dir) /* Found an object */ |
simon | 0:560a6744936c | 1321 | get_fileinfo(finfo, dir); |
simon | 0:560a6744936c | 1322 | else /* It is root dir */ |
simon | 0:560a6744936c | 1323 | res = FR_INVALID_NAME; |
simon | 0:560a6744936c | 1324 | } |
simon | 0:560a6744936c | 1325 | } |
simon | 0:560a6744936c | 1326 | |
simon | 0:560a6744936c | 1327 | return res; |
simon | 0:560a6744936c | 1328 | } |
simon | 0:560a6744936c | 1329 | |
simon | 0:560a6744936c | 1330 | |
simon | 0:560a6744936c | 1331 | |
simon | 0:560a6744936c | 1332 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1333 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1334 | /* Truncate File */ |
simon | 0:560a6744936c | 1335 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1336 | |
simon | 0:560a6744936c | 1337 | FRESULT f_truncate ( |
simon | 0:560a6744936c | 1338 | FIL *fp /* Pointer to the file object */ |
simon | 0:560a6744936c | 1339 | ) |
simon | 0:560a6744936c | 1340 | { |
simon | 0:560a6744936c | 1341 | FRESULT res; |
simon | 0:560a6744936c | 1342 | DWORD ncl; |
simon | 0:560a6744936c | 1343 | |
simon | 0:560a6744936c | 1344 | |
simon | 0:560a6744936c | 1345 | res = validate(fp->fs, fp->id); /* Check validity of the object */ |
simon | 0:560a6744936c | 1346 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1347 | if (fp->flag & FA__ERROR) return FR_RW_ERROR; /* Check error flag */ |
simon | 0:560a6744936c | 1348 | if (!(fp->flag & FA_WRITE)) return FR_DENIED; /* Check access mode */ |
simon | 0:560a6744936c | 1349 | |
simon | 0:560a6744936c | 1350 | if (fp->fsize > fp->fptr) { |
simon | 0:560a6744936c | 1351 | fp->fsize = fp->fptr; /* Set file size to current R/W point */ |
simon | 0:560a6744936c | 1352 | fp->flag |= FA__WRITTEN; |
simon | 0:560a6744936c | 1353 | if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ |
simon | 0:560a6744936c | 1354 | if (!remove_chain(fp->fs, fp->org_clust)) goto ft_error; |
simon | 0:560a6744936c | 1355 | fp->org_clust = 0; |
simon | 0:560a6744936c | 1356 | } else { /* When truncate a part of the file, remove remaining clusters */ |
simon | 0:560a6744936c | 1357 | ncl = get_cluster(fp->fs, fp->curr_clust); |
simon | 0:560a6744936c | 1358 | if (ncl < 2) goto ft_error; |
simon | 0:560a6744936c | 1359 | if (ncl < fp->fs->max_clust) { |
simon | 0:560a6744936c | 1360 | if (!put_cluster(fp->fs, fp->curr_clust, 0x0FFFFFFF)) goto ft_error; |
simon | 0:560a6744936c | 1361 | if (!remove_chain(fp->fs, ncl)) goto ft_error; |
simon | 0:560a6744936c | 1362 | } |
simon | 0:560a6744936c | 1363 | } |
simon | 0:560a6744936c | 1364 | } |
simon | 0:560a6744936c | 1365 | |
simon | 0:560a6744936c | 1366 | return FR_OK; |
simon | 0:560a6744936c | 1367 | |
simon | 0:560a6744936c | 1368 | ft_error: /* Abort this file due to an unrecoverable error */ |
simon | 0:560a6744936c | 1369 | fp->flag |= FA__ERROR; |
simon | 0:560a6744936c | 1370 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1371 | } |
simon | 0:560a6744936c | 1372 | |
simon | 0:560a6744936c | 1373 | |
simon | 0:560a6744936c | 1374 | |
simon | 0:560a6744936c | 1375 | |
simon | 0:560a6744936c | 1376 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1377 | /* Get Number of Free Clusters */ |
simon | 0:560a6744936c | 1378 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1379 | |
simon | 0:560a6744936c | 1380 | FRESULT f_getfree ( |
simon | 0:560a6744936c | 1381 | const char *drv, /* Pointer to the logical drive number (root dir) */ |
simon | 0:560a6744936c | 1382 | DWORD *nclust, /* Pointer to the variable to return number of free clusters */ |
simon | 0:560a6744936c | 1383 | FATFS **fatfs /* Pointer to pointer to corresponding file system object to return */ |
simon | 0:560a6744936c | 1384 | ) |
simon | 0:560a6744936c | 1385 | { |
simon | 0:560a6744936c | 1386 | FRESULT res; |
simon | 0:560a6744936c | 1387 | DWORD n, clust, sect; |
simon | 0:560a6744936c | 1388 | BYTE fat, f, *p; |
simon | 0:560a6744936c | 1389 | |
simon | 0:560a6744936c | 1390 | |
simon | 0:560a6744936c | 1391 | /* Get drive number */ |
simon | 0:560a6744936c | 1392 | res = auto_mount(&drv, fatfs, 0); |
simon | 0:560a6744936c | 1393 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1394 | |
simon | 0:560a6744936c | 1395 | /* If number of free cluster is valid, return it without cluster scan. */ |
simon | 0:560a6744936c | 1396 | if ((*fatfs)->free_clust <= (*fatfs)->max_clust - 2) { |
simon | 0:560a6744936c | 1397 | *nclust = (*fatfs)->free_clust; |
simon | 0:560a6744936c | 1398 | return FR_OK; |
simon | 0:560a6744936c | 1399 | } |
simon | 0:560a6744936c | 1400 | |
simon | 0:560a6744936c | 1401 | /* Get number of free clusters */ |
simon | 0:560a6744936c | 1402 | fat = (*fatfs)->fs_type; |
simon | 0:560a6744936c | 1403 | n = 0; |
simon | 0:560a6744936c | 1404 | if (fat == FS_FAT12) { |
simon | 0:560a6744936c | 1405 | clust = 2; |
simon | 0:560a6744936c | 1406 | do { |
simon | 0:560a6744936c | 1407 | if ((WORD)get_cluster(*fatfs, clust) == 0) n++; |
simon | 0:560a6744936c | 1408 | } while (++clust < (*fatfs)->max_clust); |
simon | 0:560a6744936c | 1409 | } else { |
simon | 0:560a6744936c | 1410 | clust = (*fatfs)->max_clust; |
simon | 0:560a6744936c | 1411 | sect = (*fatfs)->fatbase; |
simon | 0:560a6744936c | 1412 | f = 0; p = 0; |
simon | 0:560a6744936c | 1413 | do { |
simon | 0:560a6744936c | 1414 | if (!f) { |
simon | 0:560a6744936c | 1415 | if (!move_window(*fatfs, sect++)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1416 | p = (*fatfs)->win; |
simon | 0:560a6744936c | 1417 | } |
simon | 0:560a6744936c | 1418 | if (fat == FS_FAT16) { |
simon | 0:560a6744936c | 1419 | if (LD_WORD(p) == 0) n++; |
simon | 0:560a6744936c | 1420 | p += 2; f += 1; |
simon | 0:560a6744936c | 1421 | } else { |
simon | 0:560a6744936c | 1422 | if (LD_DWORD(p) == 0) n++; |
simon | 0:560a6744936c | 1423 | p += 4; f += 2; |
simon | 0:560a6744936c | 1424 | } |
simon | 0:560a6744936c | 1425 | } while (--clust); |
simon | 0:560a6744936c | 1426 | } |
simon | 0:560a6744936c | 1427 | (*fatfs)->free_clust = n; |
simon | 0:560a6744936c | 1428 | #if _USE_FSINFO |
simon | 0:560a6744936c | 1429 | if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1; |
simon | 0:560a6744936c | 1430 | #endif |
simon | 0:560a6744936c | 1431 | |
simon | 0:560a6744936c | 1432 | *nclust = n; |
simon | 0:560a6744936c | 1433 | return FR_OK; |
simon | 0:560a6744936c | 1434 | } |
simon | 0:560a6744936c | 1435 | |
simon | 0:560a6744936c | 1436 | |
simon | 0:560a6744936c | 1437 | |
simon | 0:560a6744936c | 1438 | |
simon | 0:560a6744936c | 1439 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1440 | /* Delete a File or Directory */ |
simon | 0:560a6744936c | 1441 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1442 | |
simon | 0:560a6744936c | 1443 | FRESULT f_unlink ( |
simon | 0:560a6744936c | 1444 | const char *path /* Pointer to the file or directory path */ |
simon | 0:560a6744936c | 1445 | ) |
simon | 0:560a6744936c | 1446 | { |
simon | 0:560a6744936c | 1447 | FRESULT res; |
simon | 0:560a6744936c | 1448 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1449 | BYTE *dir, *sdir; |
simon | 0:560a6744936c | 1450 | DWORD dclust, dsect; |
simon | 0:560a6744936c | 1451 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1452 | |
simon | 0:560a6744936c | 1453 | |
simon | 0:560a6744936c | 1454 | res = auto_mount(&path, &dj.fs, 1); |
simon | 0:560a6744936c | 1455 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1456 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 1457 | if (res != FR_OK) return res; /* Trace failed */ |
simon | 0:560a6744936c | 1458 | if (!dir) return FR_INVALID_NAME; /* It is the root directory */ |
simon | 0:560a6744936c | 1459 | if (dir[DIR_Attr] & AM_RDO) return FR_DENIED; /* It is a R/O object */ |
simon | 0:560a6744936c | 1460 | dsect = dj.fs->winsect; |
simon | 0:560a6744936c | 1461 | dclust = ((DWORD)LD_WORD(&dir[DIR_FstClusHI]) << 16) | LD_WORD(&dir[DIR_FstClusLO]); |
simon | 0:560a6744936c | 1462 | |
simon | 0:560a6744936c | 1463 | if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */ |
simon | 0:560a6744936c | 1464 | dj.clust = dclust; /* Check if the sub-dir is empty or not */ |
simon | 0:560a6744936c | 1465 | dj.sect = clust2sect(dj.fs, dclust); |
simon | 0:560a6744936c | 1466 | dj.index = 2; |
simon | 0:560a6744936c | 1467 | do { |
simon | 0:560a6744936c | 1468 | if (!move_window(dj.fs, dj.sect)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1469 | sdir = &dj.fs->win[(dj.index & ((SS(dj.fs) - 1) >> 5)) * 32]; |
simon | 0:560a6744936c | 1470 | if (sdir[DIR_Name] == 0) break; |
simon | 0:560a6744936c | 1471 | if (sdir[DIR_Name] != 0xE5 && !(sdir[DIR_Attr] & AM_VOL)) |
simon | 0:560a6744936c | 1472 | return FR_DENIED; /* The directory is not empty */ |
simon | 0:560a6744936c | 1473 | } while (next_dir_entry(&dj)); |
simon | 0:560a6744936c | 1474 | } |
simon | 0:560a6744936c | 1475 | |
simon | 0:560a6744936c | 1476 | if (!move_window(dj.fs, dsect)) return FR_RW_ERROR; /* Mark the directory entry 'deleted' */ |
simon | 0:560a6744936c | 1477 | dir[DIR_Name] = 0xE5; |
simon | 0:560a6744936c | 1478 | dj.fs->winflag = 1; |
simon | 0:560a6744936c | 1479 | if (!remove_chain(dj.fs, dclust)) return FR_RW_ERROR; /* Remove the cluster chain */ |
simon | 0:560a6744936c | 1480 | |
simon | 0:560a6744936c | 1481 | return sync(dj.fs); |
simon | 0:560a6744936c | 1482 | } |
simon | 0:560a6744936c | 1483 | |
simon | 0:560a6744936c | 1484 | |
simon | 0:560a6744936c | 1485 | |
simon | 0:560a6744936c | 1486 | |
simon | 0:560a6744936c | 1487 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1488 | /* Create a Directory */ |
simon | 0:560a6744936c | 1489 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1490 | |
simon | 0:560a6744936c | 1491 | FRESULT f_mkdir ( |
simon | 0:560a6744936c | 1492 | const char *path /* Pointer to the directory path */ |
simon | 0:560a6744936c | 1493 | ) |
simon | 0:560a6744936c | 1494 | { |
simon | 0:560a6744936c | 1495 | FRESULT res; |
simon | 0:560a6744936c | 1496 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1497 | BYTE *dir, *fw, n; |
simon | 0:560a6744936c | 1498 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1499 | DWORD sect, dsect, dclust, pclust, tim; |
simon | 0:560a6744936c | 1500 | |
simon | 0:560a6744936c | 1501 | |
simon | 0:560a6744936c | 1502 | res = auto_mount(&path, &dj.fs, 1); |
simon | 0:560a6744936c | 1503 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1504 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 1505 | if (res == FR_OK) return FR_EXIST; /* Any file or directory is already existing */ |
simon | 0:560a6744936c | 1506 | if (res != FR_NO_FILE) return res; |
simon | 0:560a6744936c | 1507 | |
simon | 0:560a6744936c | 1508 | res = reserve_direntry(&dj, &dir); /* Reserve a directory entry */ |
simon | 0:560a6744936c | 1509 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1510 | sect = dj.fs->winsect; |
simon | 0:560a6744936c | 1511 | dclust = create_chain(dj.fs, 0); /* Allocate a cluster for new directory table */ |
simon | 0:560a6744936c | 1512 | if (dclust == 1) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1513 | dsect = clust2sect(dj.fs, dclust); |
simon | 0:560a6744936c | 1514 | if (!dsect) return FR_DENIED; |
simon | 0:560a6744936c | 1515 | if (!move_window(dj.fs, dsect)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1516 | |
simon | 0:560a6744936c | 1517 | fw = dj.fs->win; |
simon | 0:560a6744936c | 1518 | memset(fw, 0, SS(dj.fs)); /* Clear the new directory table */ |
simon | 0:560a6744936c | 1519 | for (n = 1; n < dj.fs->csize; n++) { |
simon | 0:560a6744936c | 1520 | if (disk_write(dj.fs->drive, fw, ++dsect, 1) != RES_OK) |
simon | 0:560a6744936c | 1521 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1522 | } |
simon | 0:560a6744936c | 1523 | memset(&fw[DIR_Name], ' ', 8+3); /* Create "." entry */ |
simon | 0:560a6744936c | 1524 | fw[DIR_Name] = '.'; |
simon | 0:560a6744936c | 1525 | fw[DIR_Attr] = AM_DIR; |
simon | 0:560a6744936c | 1526 | tim = get_fattime(); |
simon | 0:560a6744936c | 1527 | ST_DWORD(&fw[DIR_WrtTime], tim); |
simon | 0:560a6744936c | 1528 | memcpy(&fw[32], &fw[0], 32); fw[33] = '.'; /* Create ".." entry */ |
simon | 0:560a6744936c | 1529 | ST_WORD(&fw[ DIR_FstClusLO], dclust); |
simon | 0:560a6744936c | 1530 | ST_WORD(&fw[ DIR_FstClusHI], dclust >> 16); |
simon | 0:560a6744936c | 1531 | pclust = dj.sclust; |
simon | 0:560a6744936c | 1532 | if (dj.fs->fs_type == FS_FAT32 && pclust == dj.fs->dirbase) pclust = 0; |
simon | 0:560a6744936c | 1533 | ST_WORD(&fw[32+DIR_FstClusLO], pclust); |
simon | 0:560a6744936c | 1534 | ST_WORD(&fw[32+DIR_FstClusHI], pclust >> 16); |
simon | 0:560a6744936c | 1535 | dj.fs->winflag = 1; |
simon | 0:560a6744936c | 1536 | |
simon | 0:560a6744936c | 1537 | if (!move_window(dj.fs, sect)) return FR_RW_ERROR; |
simon | 0:560a6744936c | 1538 | memset(&dir[0], 0, 32); /* Initialize the new entry */ |
simon | 0:560a6744936c | 1539 | memcpy(&dir[DIR_Name], fn, 8+3); /* Name */ |
simon | 0:560a6744936c | 1540 | dir[DIR_NTres] = fn[11]; |
simon | 0:560a6744936c | 1541 | dir[DIR_Attr] = AM_DIR; /* Attribute */ |
simon | 0:560a6744936c | 1542 | ST_DWORD(&dir[DIR_WrtTime], tim); /* Crated time */ |
simon | 0:560a6744936c | 1543 | ST_WORD(&dir[DIR_FstClusLO], dclust); /* Table start cluster */ |
simon | 0:560a6744936c | 1544 | ST_WORD(&dir[DIR_FstClusHI], dclust >> 16); |
simon | 0:560a6744936c | 1545 | |
simon | 0:560a6744936c | 1546 | return sync(dj.fs); |
simon | 0:560a6744936c | 1547 | } |
simon | 0:560a6744936c | 1548 | |
simon | 0:560a6744936c | 1549 | |
simon | 0:560a6744936c | 1550 | |
simon | 0:560a6744936c | 1551 | |
simon | 0:560a6744936c | 1552 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1553 | /* Change File Attribute */ |
simon | 0:560a6744936c | 1554 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1555 | |
simon | 0:560a6744936c | 1556 | FRESULT f_chmod ( |
simon | 0:560a6744936c | 1557 | const char *path, /* Pointer to the file path */ |
simon | 0:560a6744936c | 1558 | BYTE value, /* Attribute bits */ |
simon | 0:560a6744936c | 1559 | BYTE mask /* Attribute mask to change */ |
simon | 0:560a6744936c | 1560 | ) |
simon | 0:560a6744936c | 1561 | { |
simon | 0:560a6744936c | 1562 | FRESULT res; |
simon | 0:560a6744936c | 1563 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1564 | BYTE *dir; |
simon | 0:560a6744936c | 1565 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1566 | |
simon | 0:560a6744936c | 1567 | |
simon | 0:560a6744936c | 1568 | res = auto_mount(&path, &dj.fs, 1); |
simon | 0:560a6744936c | 1569 | if (res == FR_OK) { |
simon | 0:560a6744936c | 1570 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 1571 | if (res == FR_OK) { /* Trace completed */ |
simon | 0:560a6744936c | 1572 | if (!dir) { |
simon | 0:560a6744936c | 1573 | res = FR_INVALID_NAME; /* Root directory */ |
simon | 0:560a6744936c | 1574 | } else { |
simon | 0:560a6744936c | 1575 | mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ |
simon | 0:560a6744936c | 1576 | dir[DIR_Attr] = (value & mask) | (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ |
simon | 0:560a6744936c | 1577 | res = sync(dj.fs); |
simon | 0:560a6744936c | 1578 | } |
simon | 0:560a6744936c | 1579 | } |
simon | 0:560a6744936c | 1580 | } |
simon | 0:560a6744936c | 1581 | return res; |
simon | 0:560a6744936c | 1582 | } |
simon | 0:560a6744936c | 1583 | |
simon | 0:560a6744936c | 1584 | |
simon | 0:560a6744936c | 1585 | |
simon | 0:560a6744936c | 1586 | |
simon | 0:560a6744936c | 1587 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1588 | /* Change Timestamp */ |
simon | 0:560a6744936c | 1589 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1590 | |
simon | 0:560a6744936c | 1591 | FRESULT f_utime ( |
simon | 0:560a6744936c | 1592 | const char *path, /* Pointer to the file/directory name */ |
simon | 0:560a6744936c | 1593 | const FILINFO *finfo /* Pointer to the timestamp to be set */ |
simon | 0:560a6744936c | 1594 | ) |
simon | 0:560a6744936c | 1595 | { |
simon | 0:560a6744936c | 1596 | FRESULT res; |
simon | 0:560a6744936c | 1597 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1598 | BYTE *dir; |
simon | 0:560a6744936c | 1599 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1600 | |
simon | 0:560a6744936c | 1601 | |
simon | 0:560a6744936c | 1602 | res = auto_mount(&path, &dj.fs, 1); |
simon | 0:560a6744936c | 1603 | if (res == FR_OK) { |
simon | 0:560a6744936c | 1604 | res = trace_path(&dj, fn, path, &dir); /* Trace the file path */ |
simon | 0:560a6744936c | 1605 | if (res == FR_OK) { /* Trace completed */ |
simon | 0:560a6744936c | 1606 | if (!dir) { |
simon | 0:560a6744936c | 1607 | res = FR_INVALID_NAME; /* Root directory */ |
simon | 0:560a6744936c | 1608 | } else { |
simon | 0:560a6744936c | 1609 | ST_WORD(&dir[DIR_WrtTime], finfo->ftime); |
simon | 0:560a6744936c | 1610 | ST_WORD(&dir[DIR_WrtDate], finfo->fdate); |
simon | 0:560a6744936c | 1611 | res = sync(dj.fs); |
simon | 0:560a6744936c | 1612 | } |
simon | 0:560a6744936c | 1613 | } |
simon | 0:560a6744936c | 1614 | } |
simon | 0:560a6744936c | 1615 | return res; |
simon | 0:560a6744936c | 1616 | } |
simon | 0:560a6744936c | 1617 | |
simon | 0:560a6744936c | 1618 | |
simon | 0:560a6744936c | 1619 | |
simon | 0:560a6744936c | 1620 | |
simon | 0:560a6744936c | 1621 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1622 | /* Rename File/Directory */ |
simon | 0:560a6744936c | 1623 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1624 | |
simon | 0:560a6744936c | 1625 | FRESULT f_rename ( |
simon | 0:560a6744936c | 1626 | const char *path_old, /* Pointer to the old name */ |
simon | 0:560a6744936c | 1627 | const char *path_new /* Pointer to the new name */ |
simon | 0:560a6744936c | 1628 | ) |
simon | 0:560a6744936c | 1629 | { |
simon | 0:560a6744936c | 1630 | FRESULT res; |
simon | 0:560a6744936c | 1631 | FATFS_DIR dj; |
simon | 0:560a6744936c | 1632 | DWORD sect_old; |
simon | 0:560a6744936c | 1633 | BYTE *dir_old, *dir_new, direntry[32-11]; |
simon | 0:560a6744936c | 1634 | char fn[8+3+1]; |
simon | 0:560a6744936c | 1635 | |
simon | 0:560a6744936c | 1636 | |
simon | 0:560a6744936c | 1637 | res = auto_mount(&path_old, &dj.fs, 1); |
simon | 0:560a6744936c | 1638 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1639 | |
simon | 0:560a6744936c | 1640 | res = trace_path(&dj, fn, path_old, &dir_old); /* Check old object */ |
simon | 0:560a6744936c | 1641 | if (res != FR_OK) return res; /* The old object is not found */ |
simon | 0:560a6744936c | 1642 | if (!dir_old) return FR_NO_FILE; |
simon | 0:560a6744936c | 1643 | sect_old = dj.fs->winsect; /* Save the object information */ |
simon | 0:560a6744936c | 1644 | memcpy(direntry, &dir_old[DIR_Attr], 32-11); |
simon | 0:560a6744936c | 1645 | |
simon | 0:560a6744936c | 1646 | res = trace_path(&dj, fn, path_new, &dir_new); /* Check new object */ |
simon | 0:560a6744936c | 1647 | if (res == FR_OK) return FR_EXIST; /* The new object name is already existing */ |
simon | 0:560a6744936c | 1648 | if (res != FR_NO_FILE) return res; /* Is there no old name? */ |
simon | 0:560a6744936c | 1649 | res = reserve_direntry(&dj, &dir_new); /* Reserve a directory entry */ |
simon | 0:560a6744936c | 1650 | if (res != FR_OK) return res; |
simon | 0:560a6744936c | 1651 | |
simon | 0:560a6744936c | 1652 | memcpy(&dir_new[DIR_Attr], direntry, 32-11); /* Create new entry */ |
simon | 0:560a6744936c | 1653 | memcpy(&dir_new[DIR_Name], fn, 8+3); |
simon | 0:560a6744936c | 1654 | dir_new[DIR_NTres] = fn[11]; |
simon | 0:560a6744936c | 1655 | dj.fs->winflag = 1; |
simon | 0:560a6744936c | 1656 | |
simon | 0:560a6744936c | 1657 | if (!move_window(dj.fs, sect_old)) return FR_RW_ERROR; /* Delete old entry */ |
simon | 0:560a6744936c | 1658 | dir_old[DIR_Name] = 0xE5; |
simon | 0:560a6744936c | 1659 | |
simon | 0:560a6744936c | 1660 | return sync(dj.fs); |
simon | 0:560a6744936c | 1661 | } |
simon | 0:560a6744936c | 1662 | |
simon | 0:560a6744936c | 1663 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 1664 | #endif /* _FS_MINIMIZE == 0 */ |
simon | 0:560a6744936c | 1665 | #endif /* _FS_MINIMIZE <= 1 */ |
simon | 0:560a6744936c | 1666 | #endif /* _FS_MINIMIZE <= 2 */ |
simon | 0:560a6744936c | 1667 | |
simon | 0:560a6744936c | 1668 | |
simon | 0:560a6744936c | 1669 | |
simon | 0:560a6744936c | 1670 | #if _USE_MKFS && !_FS_READONLY |
simon | 0:560a6744936c | 1671 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1672 | /* Create File System on the Drive */ |
simon | 0:560a6744936c | 1673 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1674 | #define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */ |
simon | 0:560a6744936c | 1675 | #define N_FATS 1 /* 1 or 2 */ |
simon | 0:560a6744936c | 1676 | #define MAX_SECTOR 64000000UL /* Maximum partition size */ |
simon | 0:560a6744936c | 1677 | #define MIN_SECTOR 2000UL /* Minimum partition size */ |
simon | 0:560a6744936c | 1678 | |
simon | 0:560a6744936c | 1679 | |
simon | 0:560a6744936c | 1680 | |
simon | 0:560a6744936c | 1681 | FRESULT f_mkfs ( |
simon | 0:560a6744936c | 1682 | BYTE drv, /* Logical drive number */ |
simon | 0:560a6744936c | 1683 | BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */ |
simon | 0:560a6744936c | 1684 | WORD allocsize /* Allocation unit size [bytes] */ |
simon | 0:560a6744936c | 1685 | ) |
simon | 0:560a6744936c | 1686 | { |
simon | 0:560a6744936c | 1687 | BYTE fmt, m, *tbl; |
simon | 0:560a6744936c | 1688 | DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */ |
simon | 0:560a6744936c | 1689 | DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */ |
simon | 0:560a6744936c | 1690 | DWORD n_clust, n; |
simon | 0:560a6744936c | 1691 | FATFS *fs; |
simon | 0:560a6744936c | 1692 | DSTATUS stat; |
simon | 0:560a6744936c | 1693 | |
simon | 0:560a6744936c | 1694 | |
simon | 0:560a6744936c | 1695 | /* Check validity of the parameters */ |
simon | 0:560a6744936c | 1696 | if (drv >= _DRIVES) return FR_INVALID_DRIVE; |
simon | 0:560a6744936c | 1697 | if (partition >= 2) return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1698 | for (n = 512; n <= 32768U && n != allocsize; n <<= 1); |
simon | 0:560a6744936c | 1699 | if (n != allocsize) return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1700 | |
simon | 0:560a6744936c | 1701 | /* Check mounted drive and clear work area */ |
simon | 0:560a6744936c | 1702 | fs = FatFs[drv]; |
simon | 0:560a6744936c | 1703 | if (!fs) return FR_NOT_ENABLED; |
simon | 0:560a6744936c | 1704 | fs->fs_type = 0; |
simon | 0:560a6744936c | 1705 | drv = LD2PD(drv); |
simon | 0:560a6744936c | 1706 | |
simon | 0:560a6744936c | 1707 | /* Get disk statics */ |
simon | 0:560a6744936c | 1708 | stat = disk_initialize(drv); |
simon | 0:560a6744936c | 1709 | if (stat & STA_NOINIT) return FR_NOT_READY; |
simon | 0:560a6744936c | 1710 | if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; |
simon | 0:560a6744936c | 1711 | if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK || n_part < MIN_SECTOR) |
simon | 0:560a6744936c | 1712 | return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1713 | if (n_part > MAX_SECTOR) n_part = MAX_SECTOR; |
simon | 0:560a6744936c | 1714 | b_part = (!partition) ? 63 : 0; /* Boot sector */ |
simon | 0:560a6744936c | 1715 | n_part -= b_part; |
simon | 0:560a6744936c | 1716 | #if S_MAX_SIZ > 512 /* Check disk sector size */ |
simon | 0:560a6744936c | 1717 | if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK |
simon | 0:560a6744936c | 1718 | || SS(fs) > S_MAX_SIZ |
simon | 0:560a6744936c | 1719 | || SS(fs) > allocsize) |
simon | 0:560a6744936c | 1720 | return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1721 | #endif |
simon | 0:560a6744936c | 1722 | allocsize /= SS(fs); /* Number of sectors per cluster */ |
simon | 0:560a6744936c | 1723 | |
simon | 0:560a6744936c | 1724 | /* Pre-compute number of clusters and FAT type */ |
simon | 0:560a6744936c | 1725 | n_clust = n_part / allocsize; |
simon | 0:560a6744936c | 1726 | fmt = FS_FAT12; |
simon | 0:560a6744936c | 1727 | if (n_clust >= 0xFF5) fmt = FS_FAT16; |
simon | 0:560a6744936c | 1728 | if (n_clust >= 0xFFF5) fmt = FS_FAT32; |
simon | 0:560a6744936c | 1729 | |
simon | 0:560a6744936c | 1730 | /* Determine offset and size of FAT structure */ |
simon | 0:560a6744936c | 1731 | switch (fmt) { |
simon | 0:560a6744936c | 1732 | case FS_FAT12: |
simon | 0:560a6744936c | 1733 | n_fat = ((n_clust * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs); |
simon | 0:560a6744936c | 1734 | n_rsv = 1 + partition; |
simon | 0:560a6744936c | 1735 | n_dir = N_ROOTDIR * 32 / SS(fs); |
simon | 0:560a6744936c | 1736 | break; |
simon | 0:560a6744936c | 1737 | case FS_FAT16: |
simon | 0:560a6744936c | 1738 | n_fat = ((n_clust * 2) + 4 + SS(fs) - 1) / SS(fs); |
simon | 0:560a6744936c | 1739 | n_rsv = 1 + partition; |
simon | 0:560a6744936c | 1740 | n_dir = N_ROOTDIR * 32 / SS(fs); |
simon | 0:560a6744936c | 1741 | break; |
simon | 0:560a6744936c | 1742 | default: |
simon | 0:560a6744936c | 1743 | n_fat = ((n_clust * 4) + 8 + SS(fs) - 1) / SS(fs); |
simon | 0:560a6744936c | 1744 | n_rsv = 33 - partition; |
simon | 0:560a6744936c | 1745 | n_dir = 0; |
simon | 0:560a6744936c | 1746 | } |
simon | 0:560a6744936c | 1747 | b_fat = b_part + n_rsv; /* FATs start sector */ |
simon | 0:560a6744936c | 1748 | b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */ |
simon | 0:560a6744936c | 1749 | b_data = b_dir + n_dir; /* Data start sector */ |
simon | 0:560a6744936c | 1750 | |
simon | 0:560a6744936c | 1751 | /* Align data start sector to erase block boundary (for flash memory media) */ |
simon | 0:560a6744936c | 1752 | if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1753 | n = (b_data + n - 1) & ~(n - 1); |
simon | 0:560a6744936c | 1754 | n_fat += (n - b_data) / N_FATS; |
simon | 0:560a6744936c | 1755 | /* b_dir and b_data are no longer used below */ |
simon | 0:560a6744936c | 1756 | |
simon | 0:560a6744936c | 1757 | /* Determine number of cluster and final check of validity of the FAT type */ |
simon | 0:560a6744936c | 1758 | n_clust = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize; |
simon | 0:560a6744936c | 1759 | if ( (fmt == FS_FAT16 && n_clust < 0xFF5) |
simon | 0:560a6744936c | 1760 | || (fmt == FS_FAT32 && n_clust < 0xFFF5)) |
simon | 0:560a6744936c | 1761 | return FR_MKFS_ABORTED; |
simon | 0:560a6744936c | 1762 | |
simon | 0:560a6744936c | 1763 | /* Create partition table if needed */ |
simon | 0:560a6744936c | 1764 | if (!partition) { |
simon | 0:560a6744936c | 1765 | DWORD n_disk = b_part + n_part; |
simon | 0:560a6744936c | 1766 | |
simon | 0:560a6744936c | 1767 | tbl = &fs->win[MBR_Table]; |
simon | 0:560a6744936c | 1768 | ST_DWORD(&tbl[0], 0x00010180); /* Partition start in CHS */ |
simon | 0:560a6744936c | 1769 | if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */ |
simon | 0:560a6744936c | 1770 | n_disk = n_disk / 63 / 255; |
simon | 0:560a6744936c | 1771 | tbl[7] = (BYTE)n_disk; |
simon | 0:560a6744936c | 1772 | tbl[6] = (BYTE)((n_disk >> 2) | 63); |
simon | 0:560a6744936c | 1773 | } else { |
simon | 0:560a6744936c | 1774 | ST_WORD(&tbl[6], 0xFFFF); |
simon | 0:560a6744936c | 1775 | } |
simon | 0:560a6744936c | 1776 | tbl[5] = 254; |
simon | 0:560a6744936c | 1777 | if (fmt != FS_FAT32) /* System ID */ |
simon | 0:560a6744936c | 1778 | tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06; |
simon | 0:560a6744936c | 1779 | else |
simon | 0:560a6744936c | 1780 | tbl[4] = 0x0c; |
simon | 0:560a6744936c | 1781 | ST_DWORD(&tbl[8], 63); /* Partition start in LBA */ |
simon | 0:560a6744936c | 1782 | ST_DWORD(&tbl[12], n_part); /* Partition size in LBA */ |
simon | 0:560a6744936c | 1783 | ST_WORD(&tbl[64], 0xAA55); /* Signature */ |
simon | 0:560a6744936c | 1784 | if (disk_write(drv, fs->win, 0, 1) != RES_OK) |
simon | 0:560a6744936c | 1785 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1786 | } |
simon | 0:560a6744936c | 1787 | |
simon | 0:560a6744936c | 1788 | /* Create boot record */ |
simon | 0:560a6744936c | 1789 | tbl = fs->win; /* Clear buffer */ |
simon | 0:560a6744936c | 1790 | memset(tbl, 0, SS(fs)); |
simon | 0:560a6744936c | 1791 | ST_DWORD(&tbl[BS_jmpBoot], 0x90FEEB); /* Boot code (jmp $, nop) */ |
simon | 0:560a6744936c | 1792 | ST_WORD(&tbl[BPB_BytsPerSec], SS(fs)); /* Sector size */ |
simon | 0:560a6744936c | 1793 | tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */ |
simon | 0:560a6744936c | 1794 | ST_WORD(&tbl[BPB_RsvdSecCnt], n_rsv); /* Reserved sectors */ |
simon | 0:560a6744936c | 1795 | tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */ |
simon | 0:560a6744936c | 1796 | ST_WORD(&tbl[BPB_RootEntCnt], SS(fs) / 32 * n_dir); /* Number of rootdir entries */ |
simon | 0:560a6744936c | 1797 | if (n_part < 0x10000) { /* Number of total sectors */ |
simon | 0:560a6744936c | 1798 | ST_WORD(&tbl[BPB_TotSec16], n_part); |
simon | 0:560a6744936c | 1799 | } else { |
simon | 0:560a6744936c | 1800 | ST_DWORD(&tbl[BPB_TotSec32], n_part); |
simon | 0:560a6744936c | 1801 | } |
simon | 0:560a6744936c | 1802 | tbl[BPB_Media] = 0xF8; /* Media descripter */ |
simon | 0:560a6744936c | 1803 | ST_WORD(&tbl[BPB_SecPerTrk], 63); /* Number of sectors per track */ |
simon | 0:560a6744936c | 1804 | ST_WORD(&tbl[BPB_NumHeads], 255); /* Number of heads */ |
simon | 0:560a6744936c | 1805 | ST_DWORD(&tbl[BPB_HiddSec], b_part); /* Hidden sectors */ |
simon | 0:560a6744936c | 1806 | n = get_fattime(); /* Use current time as a VSN */ |
simon | 0:560a6744936c | 1807 | if (fmt != FS_FAT32) { |
simon | 0:560a6744936c | 1808 | ST_DWORD(&tbl[BS_VolID], n); /* Volume serial number */ |
simon | 0:560a6744936c | 1809 | ST_WORD(&tbl[BPB_FATSz16], n_fat); /* Number of secters per FAT */ |
simon | 0:560a6744936c | 1810 | tbl[BS_DrvNum] = 0x80; /* Drive number */ |
simon | 0:560a6744936c | 1811 | tbl[BS_BootSig] = 0x29; /* Extended boot signature */ |
simon | 0:560a6744936c | 1812 | memcpy(&tbl[BS_VolLab], "NO NAME FAT ", 19); /* Volume lavel, FAT signature */ |
simon | 0:560a6744936c | 1813 | } else { |
simon | 0:560a6744936c | 1814 | ST_DWORD(&tbl[BS_VolID32], n); /* Volume serial number */ |
simon | 0:560a6744936c | 1815 | ST_DWORD(&tbl[BPB_FATSz32], n_fat); /* Number of secters per FAT */ |
simon | 0:560a6744936c | 1816 | ST_DWORD(&tbl[BPB_RootClus], 2); /* Root directory cluster (2) */ |
simon | 0:560a6744936c | 1817 | ST_WORD(&tbl[BPB_FSInfo], 1); /* FSInfo record (bs+1) */ |
simon | 0:560a6744936c | 1818 | ST_WORD(&tbl[BPB_BkBootSec], 6); /* Backup boot record (bs+6) */ |
simon | 0:560a6744936c | 1819 | tbl[BS_DrvNum32] = 0x80; /* Drive number */ |
simon | 0:560a6744936c | 1820 | tbl[BS_BootSig32] = 0x29; /* Extended boot signature */ |
simon | 0:560a6744936c | 1821 | memcpy(&tbl[BS_VolLab32], "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */ |
simon | 0:560a6744936c | 1822 | } |
simon | 0:560a6744936c | 1823 | ST_WORD(&tbl[BS_55AA], 0xAA55); /* Signature */ |
simon | 0:560a6744936c | 1824 | if (disk_write(drv, tbl, b_part+0, 1) != RES_OK) |
simon | 0:560a6744936c | 1825 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1826 | if (fmt == FS_FAT32) |
simon | 0:560a6744936c | 1827 | disk_write(drv, tbl, b_part+6, 1); |
simon | 0:560a6744936c | 1828 | |
simon | 0:560a6744936c | 1829 | /* Initialize FAT area */ |
simon | 0:560a6744936c | 1830 | for (m = 0; m < N_FATS; m++) { |
simon | 0:560a6744936c | 1831 | memset(tbl, 0, SS(fs)); /* 1st sector of the FAT */ |
simon | 0:560a6744936c | 1832 | if (fmt != FS_FAT32) { |
simon | 0:560a6744936c | 1833 | n = (fmt == FS_FAT12) ? 0x00FFFFF8 : 0xFFFFFFF8; |
simon | 0:560a6744936c | 1834 | ST_DWORD(&tbl[0], n); /* Reserve cluster #0-1 (FAT12/16) */ |
simon | 0:560a6744936c | 1835 | } else { |
simon | 0:560a6744936c | 1836 | ST_DWORD(&tbl[0], 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */ |
simon | 0:560a6744936c | 1837 | ST_DWORD(&tbl[4], 0xFFFFFFFF); |
simon | 0:560a6744936c | 1838 | ST_DWORD(&tbl[8], 0x0FFFFFFF); /* Reserve cluster #2 for root dir */ |
simon | 0:560a6744936c | 1839 | } |
simon | 0:560a6744936c | 1840 | if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) |
simon | 0:560a6744936c | 1841 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1842 | memset(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */ |
simon | 0:560a6744936c | 1843 | for (n = 1; n < n_fat; n++) { |
simon | 0:560a6744936c | 1844 | if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) |
simon | 0:560a6744936c | 1845 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1846 | } |
simon | 0:560a6744936c | 1847 | } |
simon | 0:560a6744936c | 1848 | |
simon | 0:560a6744936c | 1849 | /* Initialize Root directory */ |
simon | 0:560a6744936c | 1850 | m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir); |
simon | 0:560a6744936c | 1851 | do { |
simon | 0:560a6744936c | 1852 | if (disk_write(drv, tbl, b_fat++, 1) != RES_OK) |
simon | 0:560a6744936c | 1853 | return FR_RW_ERROR; |
simon | 0:560a6744936c | 1854 | } while (--m); |
simon | 0:560a6744936c | 1855 | |
simon | 0:560a6744936c | 1856 | /* Create FSInfo record if needed */ |
simon | 0:560a6744936c | 1857 | if (fmt == FS_FAT32) { |
simon | 0:560a6744936c | 1858 | ST_WORD(&tbl[BS_55AA], 0xAA55); |
simon | 0:560a6744936c | 1859 | ST_DWORD(&tbl[FSI_LeadSig], 0x41615252); |
simon | 0:560a6744936c | 1860 | ST_DWORD(&tbl[FSI_StrucSig], 0x61417272); |
simon | 0:560a6744936c | 1861 | ST_DWORD(&tbl[FSI_Free_Count], n_clust - 1); |
simon | 0:560a6744936c | 1862 | ST_DWORD(&tbl[FSI_Nxt_Free], 0xFFFFFFFF); |
simon | 0:560a6744936c | 1863 | disk_write(drv, tbl, b_part+1, 1); |
simon | 0:560a6744936c | 1864 | disk_write(drv, tbl, b_part+7, 1); |
simon | 0:560a6744936c | 1865 | } |
simon | 0:560a6744936c | 1866 | |
simon | 0:560a6744936c | 1867 | return (disk_ioctl(drv, CTRL_SYNC, NULL) == RES_OK) ? FR_OK : FR_RW_ERROR; |
simon | 0:560a6744936c | 1868 | } |
simon | 0:560a6744936c | 1869 | |
simon | 0:560a6744936c | 1870 | #endif /* _USE_MKFS && !_FS_READONLY */ |
simon | 0:560a6744936c | 1871 | |
simon | 0:560a6744936c | 1872 | |
simon | 0:560a6744936c | 1873 | |
simon | 0:560a6744936c | 1874 | |
simon | 0:560a6744936c | 1875 | #if _USE_STRFUNC >= 1 |
simon | 0:560a6744936c | 1876 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1877 | /* Get a string from the file */ |
simon | 0:560a6744936c | 1878 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1879 | char* fgets ( |
simon | 0:560a6744936c | 1880 | char* buff, /* Pointer to the string buffer to read */ |
simon | 0:560a6744936c | 1881 | int len, /* Size of string buffer */ |
simon | 0:560a6744936c | 1882 | FIL* fil /* Pointer to the file object */ |
simon | 0:560a6744936c | 1883 | ) |
simon | 0:560a6744936c | 1884 | { |
simon | 0:560a6744936c | 1885 | int i = 0; |
simon | 0:560a6744936c | 1886 | char *p = buff; |
simon | 0:560a6744936c | 1887 | UINT rc; |
simon | 0:560a6744936c | 1888 | |
simon | 0:560a6744936c | 1889 | |
simon | 0:560a6744936c | 1890 | while (i < len - 1) { /* Read bytes until buffer gets filled */ |
simon | 0:560a6744936c | 1891 | f_read(fil, p, 1, &rc); |
simon | 0:560a6744936c | 1892 | if (rc != 1) break; /* Break when no data to read */ |
simon | 0:560a6744936c | 1893 | #if _USE_STRFUNC >= 2 |
simon | 0:560a6744936c | 1894 | if (*p == '\r') continue; /* Strip '\r' */ |
simon | 0:560a6744936c | 1895 | #endif |
simon | 0:560a6744936c | 1896 | i++; |
simon | 0:560a6744936c | 1897 | if (*p++ == '\n') break; /* Break when reached end of line */ |
simon | 0:560a6744936c | 1898 | } |
simon | 0:560a6744936c | 1899 | *p = 0; |
simon | 0:560a6744936c | 1900 | return i ? buff : 0; /* When no data read (eof or error), return with error. */ |
simon | 0:560a6744936c | 1901 | } |
simon | 0:560a6744936c | 1902 | |
simon | 0:560a6744936c | 1903 | |
simon | 0:560a6744936c | 1904 | |
simon | 0:560a6744936c | 1905 | #if !_FS_READONLY |
simon | 0:560a6744936c | 1906 | #include <stdarg.h> |
simon | 0:560a6744936c | 1907 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1908 | /* Put a character to the file */ |
simon | 0:560a6744936c | 1909 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1910 | int fputc ( |
simon | 0:560a6744936c | 1911 | int chr, /* A character to be output */ |
simon | 0:560a6744936c | 1912 | FIL* fil /* Ponter to the file object */ |
simon | 0:560a6744936c | 1913 | ) |
simon | 0:560a6744936c | 1914 | { |
simon | 0:560a6744936c | 1915 | UINT bw; |
simon | 0:560a6744936c | 1916 | char c; |
simon | 0:560a6744936c | 1917 | |
simon | 0:560a6744936c | 1918 | |
simon | 0:560a6744936c | 1919 | #if _USE_STRFUNC >= 2 |
simon | 0:560a6744936c | 1920 | if (chr == '\n') fputc ('\r', fil); /* LF -> CRLF conversion */ |
simon | 0:560a6744936c | 1921 | #endif |
simon | 0:560a6744936c | 1922 | if (!fil) { /* Special value may be used to switch the destination to any other device */ |
simon | 0:560a6744936c | 1923 | /* put_console(chr); */ |
simon | 0:560a6744936c | 1924 | return chr; |
simon | 0:560a6744936c | 1925 | } |
simon | 0:560a6744936c | 1926 | c = (char)chr; |
simon | 0:560a6744936c | 1927 | f_write(fil, &c, 1, &bw); /* Write a byte to the file */ |
simon | 0:560a6744936c | 1928 | return bw ? chr : EOF; /* Return the resulut */ |
simon | 0:560a6744936c | 1929 | } |
simon | 0:560a6744936c | 1930 | |
simon | 0:560a6744936c | 1931 | |
simon | 0:560a6744936c | 1932 | |
simon | 0:560a6744936c | 1933 | |
simon | 0:560a6744936c | 1934 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1935 | /* Put a string to the file */ |
simon | 0:560a6744936c | 1936 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1937 | int fputs ( |
simon | 0:560a6744936c | 1938 | const char* str, /* Pointer to the string to be output */ |
simon | 0:560a6744936c | 1939 | FIL* fil /* Pointer to the file object */ |
simon | 0:560a6744936c | 1940 | ) |
simon | 0:560a6744936c | 1941 | { |
simon | 0:560a6744936c | 1942 | int n; |
simon | 0:560a6744936c | 1943 | |
simon | 0:560a6744936c | 1944 | |
simon | 0:560a6744936c | 1945 | for (n = 0; *str; str++, n++) { |
simon | 0:560a6744936c | 1946 | if (fputc(*str, fil) == EOF) return EOF; |
simon | 0:560a6744936c | 1947 | } |
simon | 0:560a6744936c | 1948 | return n; |
simon | 0:560a6744936c | 1949 | } |
simon | 0:560a6744936c | 1950 | |
simon | 0:560a6744936c | 1951 | |
simon | 0:560a6744936c | 1952 | |
simon | 0:560a6744936c | 1953 | |
simon | 0:560a6744936c | 1954 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1955 | /* Put a formatted string to the file */ |
simon | 0:560a6744936c | 1956 | /*-----------------------------------------------------------------------*/ |
simon | 0:560a6744936c | 1957 | int fprintf ( |
simon | 0:560a6744936c | 1958 | FIL* fil, /* Pointer to the file object */ |
simon | 0:560a6744936c | 1959 | const char* str, /* Pointer to the format string */ |
simon | 0:560a6744936c | 1960 | ... /* Optional arguments... */ |
simon | 0:560a6744936c | 1961 | ) |
simon | 0:560a6744936c | 1962 | { |
simon | 0:560a6744936c | 1963 | va_list arp; |
simon | 0:560a6744936c | 1964 | UCHAR c, f, r; |
simon | 0:560a6744936c | 1965 | ULONG val; |
simon | 0:560a6744936c | 1966 | char s[16]; |
simon | 0:560a6744936c | 1967 | int i, w, res, cc; |
simon | 0:560a6744936c | 1968 | |
simon | 0:560a6744936c | 1969 | |
simon | 0:560a6744936c | 1970 | va_start(arp, str); |
simon | 0:560a6744936c | 1971 | |
simon | 0:560a6744936c | 1972 | for (cc = res = 0; cc != EOF; res += cc) { |
simon | 0:560a6744936c | 1973 | c = *str++; |
simon | 0:560a6744936c | 1974 | if (c == 0) break; /* End of string */ |
simon | 0:560a6744936c | 1975 | if (c != '%') { /* Non escape cahracter */ |
simon | 0:560a6744936c | 1976 | cc = fputc(c, fil); |
simon | 0:560a6744936c | 1977 | if (cc != EOF) cc = 1; |
simon | 0:560a6744936c | 1978 | continue; |
simon | 0:560a6744936c | 1979 | } |
simon | 0:560a6744936c | 1980 | w = f = 0; |
simon | 0:560a6744936c | 1981 | c = *str++; |
simon | 0:560a6744936c | 1982 | if (c == '0') { /* Flag: '0' padding */ |
simon | 0:560a6744936c | 1983 | f = 1; c = *str++; |
simon | 0:560a6744936c | 1984 | } |
simon | 0:560a6744936c | 1985 | while (c >= '0' && c <= '9') { /* Precision */ |
simon | 0:560a6744936c | 1986 | w = w * 10 + (c - '0'); |
simon | 0:560a6744936c | 1987 | c = *str++; |
simon | 0:560a6744936c | 1988 | } |
simon | 0:560a6744936c | 1989 | if (c == 'l') { /* Prefix: Size is long int */ |
simon | 0:560a6744936c | 1990 | f |= 2; c = *str++; |
simon | 0:560a6744936c | 1991 | } |
simon | 0:560a6744936c | 1992 | if (c == 's') { /* Type is string */ |
simon | 0:560a6744936c | 1993 | cc = fputs(va_arg(arp, char*), fil); |
simon | 0:560a6744936c | 1994 | continue; |
simon | 0:560a6744936c | 1995 | } |
simon | 0:560a6744936c | 1996 | if (c == 'c') { /* Type is character */ |
simon | 0:560a6744936c | 1997 | cc = fputc(va_arg(arp, char), fil); |
simon | 0:560a6744936c | 1998 | if (cc != EOF) cc = 1; |
simon | 0:560a6744936c | 1999 | continue; |
simon | 0:560a6744936c | 2000 | } |
simon | 0:560a6744936c | 2001 | r = 0; |
simon | 0:560a6744936c | 2002 | if (c == 'd') r = 10; /* Type is signed decimal */ |
simon | 0:560a6744936c | 2003 | if (c == 'u') r = 10; /* Type is unsigned decimal */ |
simon | 0:560a6744936c | 2004 | if (c == 'X') r = 16; /* Type is unsigned hexdecimal */ |
simon | 0:560a6744936c | 2005 | if (r == 0) break; /* Unknown type */ |
simon | 0:560a6744936c | 2006 | if (f & 2) { /* Get the value */ |
simon | 0:560a6744936c | 2007 | val = (ULONG)va_arg(arp, long); |
simon | 0:560a6744936c | 2008 | } else { |
simon | 0:560a6744936c | 2009 | val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int); |
simon | 0:560a6744936c | 2010 | } |
simon | 0:560a6744936c | 2011 | /* Put numeral string */ |
simon | 0:560a6744936c | 2012 | if (c == 'd') { |
simon | 0:560a6744936c | 2013 | if (val >= 0x80000000) { |
simon | 0:560a6744936c | 2014 | val = 0 - val; |
simon | 0:560a6744936c | 2015 | f |= 4; |
simon | 0:560a6744936c | 2016 | } |
simon | 0:560a6744936c | 2017 | } |
simon | 0:560a6744936c | 2018 | i = sizeof(s) - 1; s[i] = 0; |
simon | 0:560a6744936c | 2019 | do { |
simon | 0:560a6744936c | 2020 | c = (UCHAR)(val % r + '0'); |
simon | 0:560a6744936c | 2021 | if (c > '9') c += 7; |
simon | 0:560a6744936c | 2022 | s[--i] = c; |
simon | 0:560a6744936c | 2023 | val /= r; |
simon | 0:560a6744936c | 2024 | } while (i && val); |
simon | 0:560a6744936c | 2025 | if (i && (f & 4)) s[--i] = '-'; |
simon | 0:560a6744936c | 2026 | w = sizeof(s) - 1 - w; |
simon | 0:560a6744936c | 2027 | while (i && i > w) s[--i] = (f & 1) ? '0' : ' '; |
simon | 0:560a6744936c | 2028 | cc = fputs(&s[i], fil); |
simon | 0:560a6744936c | 2029 | } |
simon | 0:560a6744936c | 2030 | |
simon | 0:560a6744936c | 2031 | va_end(arp); |
simon | 0:560a6744936c | 2032 | return (cc == EOF) ? cc : res; |
simon | 0:560a6744936c | 2033 | } |
simon | 0:560a6744936c | 2034 | |
simon | 0:560a6744936c | 2035 | #endif /* !_FS_READONLY */ |
simon | 0:560a6744936c | 2036 | #endif /* _USE_STRFUNC >= 1*/ |