ff.c
1 /*----------------------------------------------------------------------------/ 2 / FatFs - Generic FAT Filesystem Module R0.14 / 3 /-----------------------------------------------------------------------------/ 4 / 5 / Copyright (C) 2019, ChaN, all right reserved. 6 / 7 / FatFs module is an open source software. Redistribution and use of FatFs in 8 / source and binary forms, with or without modification, are permitted provided 9 / that the following condition is met: 10 / 11 / 1. Redistributions of source code must retain the above copyright notice, 12 / this condition and the following disclaimer. 13 / 14 / This software is provided by the copyright holder and contributors "AS IS" 15 / and any warranties related to this software are DISCLAIMED. 16 / The copyright owner or contributors be NOT LIABLE for any damages caused 17 / by use of this software. 18 / 19 /----------------------------------------------------------------------------*/ 20 21 22 #include "ff.h" /* Declarations of FatFs API */ 23 #include "diskio.h" /* Declarations of device I/O functions */ 24 25 26 /*-------------------------------------------------------------------------- 27 28 Module Private Definitions 29 30 ---------------------------------------------------------------------------*/ 31 32 #if FF_DEFINED != 86606 /* Revision ID */ 33 #error Wrong include file (ff.h). 34 #endif 35 36 37 /* Limits and boundaries */ 38 #define MAX_DIR 0x200000 /* Max size of FAT directory */ 39 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */ 40 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */ 41 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */ 42 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */ 43 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */ 44 45 46 /* Character code support macros */ 47 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z') 48 #define IsLower(c) ((c) >= 'a' && (c) <= 'z') 49 #define IsDigit(c) ((c) >= '0' && (c) <= '9') 50 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF) 51 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF) 52 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF) 53 54 55 /* Additional file access control and file status flags for internal use */ 56 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */ 57 #define FA_MODIFIED 0x40 /* File has been modified */ 58 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */ 59 60 61 /* Additional file attribute bits for internal use */ 62 #define AM_VOL 0x08 /* Volume label */ 63 #define AM_LFN 0x0F /* LFN entry */ 64 #define AM_MASK 0x3F /* Mask of defined bits */ 65 66 67 /* Name status flags in fn[11] */ 68 #define NSFLAG 11 /* Index of the name status byte */ 69 #define NS_LOSS 0x01 /* Out of 8.3 format */ 70 #define NS_LFN 0x02 /* Force to create LFN entry */ 71 #define NS_LAST 0x04 /* Last segment */ 72 #define NS_BODY 0x08 /* Lower case flag (body) */ 73 #define NS_EXT 0x10 /* Lower case flag (ext) */ 74 #define NS_DOT 0x20 /* Dot entry */ 75 #define NS_NOLFN 0x40 /* Do not find LFN */ 76 #define NS_NONAME 0x80 /* Not followed */ 77 78 79 /* exFAT directory entry types */ 80 #define ET_BITMAP 0x81 /* Allocation bitmap */ 81 #define ET_UPCASE 0x82 /* Up-case table */ 82 #define ET_VLABEL 0x83 /* Volume label */ 83 #define ET_FILEDIR 0x85 /* File and directory */ 84 #define ET_STREAM 0xC0 /* Stream extension */ 85 #define ET_FILENAME 0xC1 /* Name extension */ 86 87 88 /* FatFs refers the FAT structure as simple byte array instead of structure member 89 / because the C structure is not binary compatible between different platforms */ 90 91 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */ 92 #define BS_OEMName 3 /* OEM name (8-byte) */ 93 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */ 94 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */ 95 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */ 96 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */ 97 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */ 98 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */ 99 #define BPB_Media 21 /* Media descriptor byte (BYTE) */ 100 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */ 101 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */ 102 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */ 103 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */ 104 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */ 105 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */ 106 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */ 107 #define BS_BootSig 38 /* Extended boot signature (BYTE) */ 108 #define BS_VolID 39 /* Volume serial number (DWORD) */ 109 #define BS_VolLab 43 /* Volume label string (8-byte) */ 110 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */ 111 #define BS_BootCode 62 /* Boot code (448-byte) */ 112 #define BS_55AA 510 /* Signature word (WORD) */ 113 114 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */ 115 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */ 116 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */ 117 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */ 118 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */ 119 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */ 120 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */ 121 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */ 122 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */ 123 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */ 124 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */ 125 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */ 126 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */ 127 128 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */ 129 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */ 130 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */ 131 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */ 132 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */ 133 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */ 134 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */ 135 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */ 136 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */ 137 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */ 138 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD) */ 139 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */ 140 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */ 141 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */ 142 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */ 143 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */ 144 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */ 145 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */ 146 147 #define DIR_Name 0 /* Short file name (11-byte) */ 148 #define DIR_Attr 11 /* Attribute (BYTE) */ 149 #define DIR_NTres 12 /* Lower case flag (BYTE) */ 150 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */ 151 #define DIR_CrtTime 14 /* Created time (DWORD) */ 152 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */ 153 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */ 154 #define DIR_ModTime 22 /* Modified time (DWORD) */ 155 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */ 156 #define DIR_FileSize 28 /* File size (DWORD) */ 157 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */ 158 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */ 159 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */ 160 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */ 161 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */ 162 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */ 163 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */ 164 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */ 165 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */ 166 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */ 167 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */ 168 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */ 169 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */ 170 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */ 171 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */ 172 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */ 173 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */ 174 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */ 175 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */ 176 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */ 177 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */ 178 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */ 179 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */ 180 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */ 181 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */ 182 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */ 183 184 #define SZDIRE 32 /* Size of a directory entry */ 185 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */ 186 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ 187 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ 188 189 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */ 190 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */ 191 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */ 192 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */ 193 194 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */ 195 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 196 #define PTE_Boot 0 /* MBR PTE: Boot indicator */ 197 #define PTE_StHead 1 /* MBR PTE: Start head */ 198 #define PTE_StSec 2 /* MBR PTE: Start sector */ 199 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */ 200 #define PTE_System 4 /* MBR PTE: System ID */ 201 #define PTE_EdHead 5 /* MBR PTE: End head */ 202 #define PTE_EdSec 6 /* MBR PTE: End sector */ 203 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */ 204 #define PTE_StLba 8 /* MBR PTE: Start in LBA */ 205 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */ 206 207 #define GPTH_Sign 0 /* GPT: Header signature (8-byte) */ 208 #define GPTH_Rev 8 /* GPT: Revision (DWORD) */ 209 #define GPTH_Size 12 /* GPT: Header size (DWORD) */ 210 #define GPTH_Bcc 16 /* GPT: Header BCC (DWORD) */ 211 #define GPTH_CurLba 24 /* GPT: Main header LBA (QWORD) */ 212 #define GPTH_BakLba 32 /* GPT: Backup header LBA (QWORD) */ 213 #define GPTH_FstLba 40 /* GPT: First LBA for partitions (QWORD) */ 214 #define GPTH_LstLba 48 /* GPT: Last LBA for partitions (QWORD) */ 215 #define GPTH_DskGuid 56 /* GPT: Disk GUID (16-byte) */ 216 #define GPTH_PtOfs 72 /* GPT: Partation table LBA (QWORD) */ 217 #define GPTH_PtNum 80 /* GPT: Number of table entries (DWORD) */ 218 #define GPTH_PteSize 84 /* GPT: Size of table entry (DWORD) */ 219 #define GPTH_PtBcc 88 /* GPT: Partation table BCC (DWORD) */ 220 #define SZ_GPTE 128 /* GPT: Size of partition table entry */ 221 #define GPTE_PtGuid 0 /* GPT PTE: Partition type GUID (16-byte) */ 222 #define GPTE_UpGuid 16 /* GPT PTE: Partition unique GUID (16-byte) */ 223 #define GPTE_FstLba 32 /* GPT PTE: First LBA (QWORD) */ 224 #define GPTE_LstLba 40 /* GPT PTE: Last LBA inclusive (QWORD) */ 225 #define GPTE_Flags 48 /* GPT PTE: Flags (QWORD) */ 226 #define GPTE_Name 56 /* GPT PTE: Name */ 227 228 229 /* Post process on fatal error in the file operations */ 230 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 231 232 233 /* Re-entrancy related */ 234 #if FF_FS_REENTRANT 235 #if FF_USE_LFN == 1 236 #error Static LFN work area cannot be used at thread-safe configuration 237 #endif 238 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 239 #else 240 #define LEAVE_FF(fs, res) return res 241 #endif 242 243 244 /* Definitions of logical drive - physical location conversion */ 245 #if FF_MULTI_PARTITION 246 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */ 247 #define LD2PT(vol) VolToPart[vol].pt /* Get partition index */ 248 #else 249 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is associated with the same physical drive number */ 250 #define LD2PT(vol) 0 /* Find first valid partition or in SFD */ 251 #endif 252 253 254 /* Definitions of sector size */ 255 #if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096) 256 #error Wrong sector size configuration 257 #endif 258 #if FF_MAX_SS == FF_MIN_SS 259 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */ 260 #else 261 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 262 #endif 263 264 265 /* Timestamp */ 266 #if FF_FS_NORTC == 1 267 #if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31 268 #error Invalid FF_FS_NORTC settings 269 #endif 270 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16) 271 #else 272 #define GET_FATTIME() get_fattime() 273 #endif 274 275 276 /* File lock controls */ 277 #if FF_FS_LOCK != 0 278 #if FF_FS_READONLY 279 #error FF_FS_LOCK must be 0 at read-only configuration 280 #endif 281 typedef struct { 282 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 283 DWORD clu; /* Object ID 2, containing directory (0:root) */ 284 DWORD ofs; /* Object ID 3, offset in the directory */ 285 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 286 } FILESEM; 287 #endif 288 289 290 /* SBCS up-case tables (\x80-\xFF) */ 291 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 292 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 293 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 294 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 296 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 297 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 298 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 299 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 300 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 301 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 302 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 303 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 304 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 305 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 306 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 307 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 308 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 309 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 310 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 311 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 312 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 313 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 314 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 315 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 316 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 317 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 318 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 319 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 320 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 321 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 322 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} 323 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 324 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 325 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 326 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 327 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 328 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 329 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 330 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 331 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 332 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 333 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 334 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 335 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 336 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 337 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 338 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 339 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 340 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 341 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 342 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 343 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 344 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 345 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 346 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 347 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 348 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 349 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 350 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 351 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 352 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 353 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 354 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 355 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 356 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 357 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 358 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 359 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 360 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 361 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 362 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 363 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 364 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 365 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 366 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 367 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 368 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 369 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 370 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 371 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 372 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 373 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 374 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 375 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 376 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 377 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 378 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 379 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 380 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 381 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 382 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 383 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 384 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 385 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 386 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 387 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 388 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 389 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 390 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 391 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 392 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 393 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 394 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 395 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 396 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 397 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 398 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 399 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 400 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 401 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 402 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 403 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 404 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 405 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 406 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 407 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 408 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 409 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 410 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 411 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 412 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 413 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 414 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 415 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 416 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 417 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 418 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 419 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 420 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 421 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 422 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 423 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 424 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 425 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 426 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} 427 428 429 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */ 430 /* <------> <------> <------> <------> <------> */ 431 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00} 432 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00} 433 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE} 434 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00} 435 436 437 /* Macros for table definitions */ 438 #define MERGE_2STR(a, b) a ## b 439 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp) 440 441 442 443 444 /*-------------------------------------------------------------------------- 445 446 Module Private Work Area 447 448 ---------------------------------------------------------------------------*/ 449 /* Remark: Variables defined here without initial value shall be guaranteed 450 / zero/null at start-up. If not, the linker option or start-up routine is 451 / not compliance with C standard. */ 452 453 /*--------------------------------*/ 454 /* File/Volume controls */ 455 /*--------------------------------*/ 456 457 #if FF_VOLUMES < 1 || FF_VOLUMES > 10 458 #error Wrong FF_VOLUMES setting 459 #endif 460 static FATFS* FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */ 461 static WORD Fsid; /* Filesystem mount ID */ 462 463 #if FF_FS_RPATH != 0 464 static BYTE CurrVol; /* Current drive */ 465 #endif 466 467 #if FF_FS_LOCK != 0 468 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */ 469 #endif 470 471 #if FF_STR_VOLUME_ID 472 #ifdef FF_VOLUME_STRS 473 static const char* const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS}; /* Pre-defined volume ID */ 474 #endif 475 #endif 476 477 #if FF_LBA64 478 #if FF_MIN_GPT > 0x100000000 479 #error Wrong FF_MIN_GPT setting 480 #endif 481 static const BYTE GUID_MS_Basic[16] = {0xA2,0xA0,0xD0,0xEB,0xE5,0xB9,0x33,0x44,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7}; 482 #endif 483 484 485 486 /*--------------------------------*/ 487 /* LFN/Directory working buffer */ 488 /*--------------------------------*/ 489 490 #if FF_USE_LFN == 0 /* Non-LFN configuration */ 491 #if FF_FS_EXFAT 492 #error LFN must be enabled when enable exFAT 493 #endif 494 #define DEF_NAMBUF 495 #define INIT_NAMBUF(fs) 496 #define FREE_NAMBUF() 497 #define LEAVE_MKFS(res) return res 498 499 #else /* LFN configurations */ 500 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255 501 #error Wrong setting of FF_MAX_LFN 502 #endif 503 #if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12 504 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF 505 #endif 506 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3 507 #error Wrong setting of FF_LFN_UNICODE 508 #endif 509 static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* FAT: Offset of LFN characters in the directory entry */ 510 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */ 511 512 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */ 513 #if FF_FS_EXFAT 514 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */ 515 #endif 516 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */ 517 #define DEF_NAMBUF 518 #define INIT_NAMBUF(fs) 519 #define FREE_NAMBUF() 520 #define LEAVE_MKFS(res) return res 521 522 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */ 523 #if FF_FS_EXFAT 524 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */ 525 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; } 526 #define FREE_NAMBUF() 527 #else 528 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */ 529 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; } 530 #define FREE_NAMBUF() 531 #endif 532 #define LEAVE_MKFS(res) return res 533 534 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */ 535 #if FF_FS_EXFAT 536 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */ 537 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2 + MAXDIRB(FF_MAX_LFN)); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+FF_MAX_LFN+1); } 538 #define FREE_NAMBUF() ff_memfree(lfn) 539 #else 540 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */ 541 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; } 542 #define FREE_NAMBUF() ff_memfree(lfn) 543 #endif 544 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; } 545 #define MAX_MALLOC 0x8000 /* Must be >=FF_MAX_SS */ 546 547 #else 548 #error Wrong setting of FF_USE_LFN 549 550 #endif /* FF_USE_LFN == 1 */ 551 #endif /* FF_USE_LFN == 0 */ 552 553 554 555 /*--------------------------------*/ 556 /* Code conversion tables */ 557 /*--------------------------------*/ 558 559 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */ 560 #define CODEPAGE CodePage 561 static WORD CodePage; /* Current code page */ 562 static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */ 563 564 static const BYTE Ct437[] = TBL_CT437; 565 static const BYTE Ct720[] = TBL_CT720; 566 static const BYTE Ct737[] = TBL_CT737; 567 static const BYTE Ct771[] = TBL_CT771; 568 static const BYTE Ct775[] = TBL_CT775; 569 static const BYTE Ct850[] = TBL_CT850; 570 static const BYTE Ct852[] = TBL_CT852; 571 static const BYTE Ct855[] = TBL_CT855; 572 static const BYTE Ct857[] = TBL_CT857; 573 static const BYTE Ct860[] = TBL_CT860; 574 static const BYTE Ct861[] = TBL_CT861; 575 static const BYTE Ct862[] = TBL_CT862; 576 static const BYTE Ct863[] = TBL_CT863; 577 static const BYTE Ct864[] = TBL_CT864; 578 static const BYTE Ct865[] = TBL_CT865; 579 static const BYTE Ct866[] = TBL_CT866; 580 static const BYTE Ct869[] = TBL_CT869; 581 static const BYTE Dc932[] = TBL_DC932; 582 static const BYTE Dc936[] = TBL_DC936; 583 static const BYTE Dc949[] = TBL_DC949; 584 static const BYTE Dc950[] = TBL_DC950; 585 586 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */ 587 #define CODEPAGE FF_CODE_PAGE 588 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE); 589 590 #else /* Static code page configuration (DBCS) */ 591 #define CODEPAGE FF_CODE_PAGE 592 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE); 593 594 #endif 595 596 597 598 599 /*-------------------------------------------------------------------------- 600 601 Module Private Functions 602 603 ---------------------------------------------------------------------------*/ 604 605 606 /*-----------------------------------------------------------------------*/ 607 /* Load/Store multi-byte word in the FAT structure */ 608 /*-----------------------------------------------------------------------*/ 609 610 static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */ 611 { 612 WORD rv; 613 614 rv = ptr[1]; 615 rv = rv << 8 | ptr[0]; 616 return rv; 617 } 618 619 static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */ 620 { 621 DWORD rv; 622 623 rv = ptr[3]; 624 rv = rv << 8 | ptr[2]; 625 rv = rv << 8 | ptr[1]; 626 rv = rv << 8 | ptr[0]; 627 return rv; 628 } 629 630 #if FF_FS_EXFAT 631 static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */ 632 { 633 QWORD rv; 634 635 rv = ptr[7]; 636 rv = rv << 8 | ptr[6]; 637 rv = rv << 8 | ptr[5]; 638 rv = rv << 8 | ptr[4]; 639 rv = rv << 8 | ptr[3]; 640 rv = rv << 8 | ptr[2]; 641 rv = rv << 8 | ptr[1]; 642 rv = rv << 8 | ptr[0]; 643 return rv; 644 } 645 #endif 646 647 #if !FF_FS_READONLY 648 static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */ 649 { 650 *ptr++ = (BYTE)val; val >>= 8; 651 *ptr++ = (BYTE)val; 652 } 653 654 static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */ 655 { 656 *ptr++ = (BYTE)val; val >>= 8; 657 *ptr++ = (BYTE)val; val >>= 8; 658 *ptr++ = (BYTE)val; val >>= 8; 659 *ptr++ = (BYTE)val; 660 } 661 662 #if FF_FS_EXFAT 663 static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */ 664 { 665 *ptr++ = (BYTE)val; val >>= 8; 666 *ptr++ = (BYTE)val; val >>= 8; 667 *ptr++ = (BYTE)val; val >>= 8; 668 *ptr++ = (BYTE)val; val >>= 8; 669 *ptr++ = (BYTE)val; val >>= 8; 670 *ptr++ = (BYTE)val; val >>= 8; 671 *ptr++ = (BYTE)val; val >>= 8; 672 *ptr++ = (BYTE)val; 673 } 674 #endif 675 #endif /* !FF_FS_READONLY */ 676 677 678 679 /*-----------------------------------------------------------------------*/ 680 /* String functions */ 681 /*-----------------------------------------------------------------------*/ 682 683 /* Copy memory to memory */ 684 static void mem_cpy (void* dst, const void* src, UINT cnt) 685 { 686 BYTE *d = (BYTE*)dst; 687 const BYTE *s = (const BYTE*)src; 688 689 if (cnt != 0) { 690 do { 691 *d++ = *s++; 692 } while (--cnt); 693 } 694 } 695 696 697 /* Fill memory block */ 698 static void mem_set (void* dst, int val, UINT cnt) 699 { 700 BYTE *d = (BYTE*)dst; 701 702 do { 703 *d++ = (BYTE)val; 704 } while (--cnt); 705 } 706 707 708 /* Compare memory block */ 709 static int mem_cmp (const void* dst, const void* src, UINT cnt) /* ZR:same, NZ:different */ 710 { 711 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 712 int r = 0; 713 714 do { 715 r = *d++ - *s++; 716 } while (--cnt && r == 0); 717 718 return r; 719 } 720 721 722 /* Check if chr is contained in the string */ 723 static int chk_chr (const char* str, int chr) /* NZ:contained, ZR:not contained */ 724 { 725 while (*str && *str != chr) str++; 726 return *str; 727 } 728 729 730 /* Test if the byte is DBC 1st byte */ 731 static int dbc_1st (BYTE c) 732 { 733 #if FF_CODE_PAGE == 0 /* Variable code page */ 734 if (DbcTbl && c >= DbcTbl[0]) { 735 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */ 736 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */ 737 } 738 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */ 739 if (c >= DbcTbl[0]) { 740 if (c <= DbcTbl[1]) return 1; 741 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; 742 } 743 #else /* SBCS fixed code page */ 744 if (c != 0) return 0; /* Always false */ 745 #endif 746 return 0; 747 } 748 749 750 /* Test if the byte is DBC 2nd byte */ 751 static int dbc_2nd (BYTE c) 752 { 753 #if FF_CODE_PAGE == 0 /* Variable code page */ 754 if (DbcTbl && c >= DbcTbl[4]) { 755 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */ 756 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */ 757 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */ 758 } 759 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */ 760 if (c >= DbcTbl[4]) { 761 if (c <= DbcTbl[5]) return 1; 762 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; 763 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; 764 } 765 #else /* SBCS fixed code page */ 766 if (c != 0) return 0; /* Always false */ 767 #endif 768 return 0; 769 } 770 771 772 #if FF_USE_LFN 773 774 /* Get a Unicode code point from the TCHAR string in defined API encodeing */ 775 static DWORD tchar2uni ( /* Returns a character in UTF-16 encoding (>=0x10000 on surrogate pair, 0xFFFFFFFF on decode error) */ 776 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */ 777 ) 778 { 779 DWORD uc; 780 const TCHAR *p = *str; 781 782 #if FF_LFN_UNICODE == 1 /* UTF-16 input */ 783 WCHAR wc; 784 785 uc = *p++; /* Get a unit */ 786 if (IsSurrogate(uc)) { /* Surrogate? */ 787 wc = *p++; /* Get low surrogate */ 788 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */ 789 uc = uc << 16 | wc; 790 } 791 792 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */ 793 BYTE b; 794 int nf; 795 796 uc = (BYTE)*p++; /* Get an encoding unit */ 797 if (uc & 0x80) { /* Multiple byte code? */ 798 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */ 799 uc &= 0x1F; nf = 1; 800 } else { 801 if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */ 802 uc &= 0x0F; nf = 2; 803 } else { 804 if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */ 805 uc &= 0x07; nf = 3; 806 } else { /* Wrong sequence */ 807 return 0xFFFFFFFF; 808 } 809 } 810 } 811 do { /* Get trailing bytes */ 812 b = (BYTE)*p++; 813 if ((b & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */ 814 uc = uc << 6 | (b & 0x3F); 815 } while (--nf != 0); 816 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */ 817 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */ 818 } 819 820 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */ 821 uc = (TCHAR)*p++; /* Get a unit */ 822 if (uc >= 0x110000 || IsSurrogate(uc)) return 0xFFFFFFFF; /* Wrong code? */ 823 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */ 824 825 #else /* ANSI/OEM input */ 826 BYTE b; 827 WCHAR wc; 828 829 wc = (BYTE)*p++; /* Get a byte */ 830 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */ 831 b = (BYTE)*p++; /* Get 2nd byte */ 832 if (!dbc_2nd(b)) return 0xFFFFFFFF; /* Invalid code? */ 833 wc = (wc << 8) + b; /* Make a DBC */ 834 } 835 if (wc != 0) { 836 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */ 837 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */ 838 } 839 uc = wc; 840 841 #endif 842 *str = p; /* Next read pointer */ 843 return uc; 844 } 845 846 847 /* Output a TCHAR string in defined API encoding */ 848 static BYTE put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */ 849 DWORD chr, /* UTF-16 encoded character (Surrogate pair if >=0x10000) */ 850 TCHAR* buf, /* Output buffer */ 851 UINT szb /* Size of the buffer */ 852 ) 853 { 854 #if FF_LFN_UNICODE == 1 /* UTF-16 output */ 855 WCHAR hs, wc; 856 857 hs = (WCHAR)(chr >> 16); 858 wc = (WCHAR)chr; 859 if (hs == 0) { /* Single encoding unit? */ 860 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */ 861 *buf = wc; 862 return 1; 863 } 864 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */ 865 *buf++ = hs; 866 *buf++ = wc; 867 return 2; 868 869 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */ 870 DWORD hc; 871 872 if (chr < 0x80) { /* Single byte code? */ 873 if (szb < 1) return 0; /* Buffer overflow? */ 874 *buf = (TCHAR)chr; 875 return 1; 876 } 877 if (chr < 0x800) { /* 2-byte sequence? */ 878 if (szb < 2) return 0; /* Buffer overflow? */ 879 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F)); 880 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 881 return 2; 882 } 883 if (chr < 0x10000) { /* 3-byte sequence? */ 884 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */ 885 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F)); 886 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F)); 887 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 888 return 3; 889 } 890 /* 4-byte sequence */ 891 if (szb < 4) return 0; /* Buffer overflow? */ 892 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */ 893 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */ 894 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */ 895 chr = (hc | chr) + 0x10000; 896 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07)); 897 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F)); 898 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F)); 899 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 900 return 4; 901 902 #elif FF_LFN_UNICODE == 3 /* UTF-32 output */ 903 DWORD hc; 904 905 if (szb < 1) return 0; /* Buffer overflow? */ 906 if (chr >= 0x10000) { /* Out of BMP? */ 907 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */ 908 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */ 909 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */ 910 chr = (hc | chr) + 0x10000; 911 } 912 *buf++ = (TCHAR)chr; 913 return 1; 914 915 #else /* ANSI/OEM output */ 916 WCHAR wc; 917 918 wc = ff_uni2oem(chr, CODEPAGE); 919 if (wc >= 0x100) { /* Is this a DBC? */ 920 if (szb < 2) return 0; 921 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */ 922 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */ 923 return 2; 924 } 925 if (wc == 0 || szb < 1) return 0; /* Invalid char or buffer overflow? */ 926 *buf++ = (TCHAR)wc; /* Store the character */ 927 return 1; 928 #endif 929 } 930 #endif /* FF_USE_LFN */ 931 932 933 #if FF_FS_REENTRANT 934 /*-----------------------------------------------------------------------*/ 935 /* Request/Release grant to access the volume */ 936 /*-----------------------------------------------------------------------*/ 937 static int lock_fs ( /* 1:Ok, 0:timeout */ 938 FATFS* fs /* Filesystem object */ 939 ) 940 { 941 return ff_req_grant(fs->sobj); 942 } 943 944 945 static void unlock_fs ( 946 FATFS* fs, /* Filesystem object */ 947 FRESULT res /* Result code to be returned */ 948 ) 949 { 950 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) { 951 ff_rel_grant(fs->sobj); 952 } 953 } 954 955 #endif 956 957 958 959 #if FF_FS_LOCK != 0 960 /*-----------------------------------------------------------------------*/ 961 /* File lock control functions */ 962 /*-----------------------------------------------------------------------*/ 963 964 static FRESULT chk_lock ( /* Check if the file can be accessed */ 965 DIR* dp, /* Directory object pointing the file to be checked */ 966 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */ 967 ) 968 { 969 UINT i, be; 970 971 /* Search open object table for the object */ 972 be = 0; 973 for (i = 0; i < FF_FS_LOCK; i++) { 974 if (Files[i].fs) { /* Existing entry */ 975 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */ 976 Files[i].clu == dp->obj.sclust && 977 Files[i].ofs == dp->dptr) break; 978 } else { /* Blank entry */ 979 be = 1; 980 } 981 } 982 if (i == FF_FS_LOCK) { /* The object has not been opened */ 983 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */ 984 } 985 986 /* The object was opened. Reject any open against writing file and all write mode open */ 987 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 988 } 989 990 991 static int enq_lock (void) /* Check if an entry is available for a new object */ 992 { 993 UINT i; 994 995 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; 996 return (i == FF_FS_LOCK) ? 0 : 1; 997 } 998 999 1000 static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 1001 DIR* dp, /* Directory object pointing the file to register or increment */ 1002 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 1003 ) 1004 { 1005 UINT i; 1006 1007 1008 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */ 1009 if (Files[i].fs == dp->obj.fs 1010 && Files[i].clu == dp->obj.sclust 1011 && Files[i].ofs == dp->dptr) break; 1012 } 1013 1014 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */ 1015 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; 1016 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */ 1017 Files[i].fs = dp->obj.fs; 1018 Files[i].clu = dp->obj.sclust; 1019 Files[i].ofs = dp->dptr; 1020 Files[i].ctr = 0; 1021 } 1022 1023 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */ 1024 1025 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 1026 1027 return i + 1; /* Index number origin from 1 */ 1028 } 1029 1030 1031 static FRESULT dec_lock ( /* Decrement object open counter */ 1032 UINT i /* Semaphore index (1..) */ 1033 ) 1034 { 1035 WORD n; 1036 FRESULT res; 1037 1038 1039 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */ 1040 n = Files[i].ctr; 1041 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 1042 if (n > 0) n--; /* Decrement read mode open count */ 1043 Files[i].ctr = n; 1044 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 1045 res = FR_OK; 1046 } else { 1047 res = FR_INT_ERR; /* Invalid index nunber */ 1048 } 1049 return res; 1050 } 1051 1052 1053 static void clear_lock ( /* Clear lock entries of the volume */ 1054 FATFS *fs 1055 ) 1056 { 1057 UINT i; 1058 1059 for (i = 0; i < FF_FS_LOCK; i++) { 1060 if (Files[i].fs == fs) Files[i].fs = 0; 1061 } 1062 } 1063 1064 #endif /* FF_FS_LOCK != 0 */ 1065 1066 1067 1068 /*-----------------------------------------------------------------------*/ 1069 /* Move/Flush disk access window in the filesystem object */ 1070 /*-----------------------------------------------------------------------*/ 1071 #if !FF_FS_READONLY 1072 static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */ 1073 FATFS* fs /* Filesystem object */ 1074 ) 1075 { 1076 FRESULT res = FR_OK; 1077 1078 1079 if (fs->wflag) { /* Is the disk access window dirty? */ 1080 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write it back into the volume */ 1081 fs->wflag = 0; /* Clear window dirty flag */ 1082 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */ 1083 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */ 1084 } 1085 } else { 1086 res = FR_DISK_ERR; 1087 } 1088 } 1089 return res; 1090 } 1091 #endif 1092 1093 1094 static FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */ 1095 FATFS* fs, /* Filesystem object */ 1096 LBA_t sect /* Sector LBA to make appearance in the fs->win[] */ 1097 ) 1098 { 1099 FRESULT res = FR_OK; 1100 1101 1102 if (sect != fs->winsect) { /* Window offset changed? */ 1103 #if !FF_FS_READONLY 1104 res = sync_window(fs); /* Flush the window */ 1105 #endif 1106 if (res == FR_OK) { /* Fill sector window with new data */ 1107 if (disk_read(fs->pdrv, fs->win, sect, 1) != RES_OK) { 1108 sect = (LBA_t)0 - 1; /* Invalidate window if read data is not valid */ 1109 res = FR_DISK_ERR; 1110 } 1111 fs->winsect = sect; 1112 } 1113 } 1114 return res; 1115 } 1116 1117 1118 1119 1120 #if !FF_FS_READONLY 1121 /*-----------------------------------------------------------------------*/ 1122 /* Synchronize filesystem and data on the storage */ 1123 /*-----------------------------------------------------------------------*/ 1124 1125 static FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */ 1126 FATFS* fs /* Filesystem object */ 1127 ) 1128 { 1129 FRESULT res; 1130 1131 1132 res = sync_window(fs); 1133 if (res == FR_OK) { 1134 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */ 1135 /* Create FSInfo structure */ 1136 mem_set(fs->win, 0, sizeof fs->win); 1137 st_word(fs->win + BS_55AA, 0xAA55); 1138 st_dword(fs->win + FSI_LeadSig, 0x41615252); 1139 st_dword(fs->win + FSI_StrucSig, 0x61417272); 1140 st_dword(fs->win + FSI_Free_Count, fs->free_clst); 1141 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); 1142 /* Write it into the FSInfo sector */ 1143 fs->winsect = fs->volbase + 1; 1144 disk_write(fs->pdrv, fs->win, fs->winsect, 1); 1145 fs->fsi_flag = 0; 1146 } 1147 /* Make sure that no pending write process in the lower layer */ 1148 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR; 1149 } 1150 1151 return res; 1152 } 1153 1154 #endif 1155 1156 1157 1158 /*-----------------------------------------------------------------------*/ 1159 /* Get physical sector number from cluster number */ 1160 /*-----------------------------------------------------------------------*/ 1161 1162 static LBA_t clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ 1163 FATFS* fs, /* Filesystem object */ 1164 DWORD clst /* Cluster# to be converted */ 1165 ) 1166 { 1167 clst -= 2; /* Cluster number is origin from 2 */ 1168 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */ 1169 return fs->database + (LBA_t)fs->csize * clst; /* Start sector number of the cluster */ 1170 } 1171 1172 1173 1174 1175 /*-----------------------------------------------------------------------*/ 1176 /* FAT access - Read value of a FAT entry */ 1177 /*-----------------------------------------------------------------------*/ 1178 1179 static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */ 1180 FFOBJID* obj, /* Corresponding object */ 1181 DWORD clst /* Cluster number to get the value */ 1182 ) 1183 { 1184 UINT wc, bc; 1185 DWORD val; 1186 FATFS *fs = obj->fs; 1187 1188 1189 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 1190 val = 1; /* Internal error */ 1191 1192 } else { 1193 val = 0xFFFFFFFF; /* Default value falls on disk error */ 1194 1195 switch (fs->fs_type) { 1196 case FS_FAT12 : 1197 bc = (UINT)clst; bc += bc / 2; 1198 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 1199 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */ 1200 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 1201 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */ 1202 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */ 1203 break; 1204 1205 case FS_FAT16 : 1206 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; 1207 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */ 1208 break; 1209 1210 case FS_FAT32 : 1211 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 1212 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */ 1213 break; 1214 #if FF_FS_EXFAT 1215 case FS_EXFAT : 1216 if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) { /* Object except root dir must have valid data length */ 1217 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */ 1218 DWORD clen = (DWORD)((LBA_t)((obj->objsize - 1) / SS(fs)) / fs->csize); /* Number of clusters - 1 */ 1219 1220 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */ 1221 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */ 1222 break; 1223 } 1224 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */ 1225 val = clst + 1; /* Generate the value */ 1226 break; 1227 } 1228 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */ 1229 if (obj->n_frag != 0) { /* Is it on the growing edge? */ 1230 val = 0x7FFFFFFF; /* Generate EOC */ 1231 } else { 1232 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 1233 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF; 1234 } 1235 break; 1236 } 1237 } 1238 /* go to default */ 1239 #endif 1240 default: 1241 val = 1; /* Internal error */ 1242 } 1243 } 1244 1245 return val; 1246 } 1247 1248 1249 1250 1251 #if !FF_FS_READONLY 1252 /*-----------------------------------------------------------------------*/ 1253 /* FAT access - Change value of a FAT entry */ 1254 /*-----------------------------------------------------------------------*/ 1255 1256 static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ 1257 FATFS* fs, /* Corresponding filesystem object */ 1258 DWORD clst, /* FAT index number (cluster number) to be changed */ 1259 DWORD val /* New value to be set to the entry */ 1260 ) 1261 { 1262 UINT bc; 1263 BYTE *p; 1264 FRESULT res = FR_INT_ERR; 1265 1266 1267 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */ 1268 switch (fs->fs_type) { 1269 case FS_FAT12 : 1270 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */ 1271 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 1272 if (res != FR_OK) break; 1273 p = fs->win + bc++ % SS(fs); 1274 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Update 1st byte */ 1275 fs->wflag = 1; 1276 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 1277 if (res != FR_OK) break; 1278 p = fs->win + bc % SS(fs); 1279 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Update 2nd byte */ 1280 fs->wflag = 1; 1281 break; 1282 1283 case FS_FAT16 : 1284 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 1285 if (res != FR_OK) break; 1286 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */ 1287 fs->wflag = 1; 1288 break; 1289 1290 case FS_FAT32 : 1291 #if FF_FS_EXFAT 1292 case FS_EXFAT : 1293 #endif 1294 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 1295 if (res != FR_OK) break; 1296 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { 1297 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000); 1298 } 1299 st_dword(fs->win + clst * 4 % SS(fs), val); 1300 fs->wflag = 1; 1301 break; 1302 } 1303 } 1304 return res; 1305 } 1306 1307 #endif /* !FF_FS_READONLY */ 1308 1309 1310 1311 1312 #if FF_FS_EXFAT && !FF_FS_READONLY 1313 /*-----------------------------------------------------------------------*/ 1314 /* exFAT: Accessing FAT and Allocation Bitmap */ 1315 /*-----------------------------------------------------------------------*/ 1316 1317 /*--------------------------------------*/ 1318 /* Find a contiguous free cluster block */ 1319 /*--------------------------------------*/ 1320 1321 static DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */ 1322 FATFS* fs, /* Filesystem object */ 1323 DWORD clst, /* Cluster number to scan from */ 1324 DWORD ncl /* Number of contiguous clusters to find (1..) */ 1325 ) 1326 { 1327 BYTE bm, bv; 1328 UINT i; 1329 DWORD val, scl, ctr; 1330 1331 1332 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */ 1333 if (clst >= fs->n_fatent - 2) clst = 0; 1334 scl = val = clst; ctr = 0; 1335 for (;;) { 1336 if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; 1337 i = val / 8 % SS(fs); bm = 1 << (val % 8); 1338 do { 1339 do { 1340 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */ 1341 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */ 1342 val = 0; bm = 0; i = SS(fs); 1343 } 1344 if (bv == 0) { /* Is it a free cluster? */ 1345 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */ 1346 } else { 1347 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */ 1348 } 1349 if (val == clst) return 0; /* All cluster scanned? */ 1350 } while (bm != 0); 1351 bm = 1; 1352 } while (++i < SS(fs)); 1353 } 1354 } 1355 1356 1357 /*----------------------------------------*/ 1358 /* Set/Clear a block of allocation bitmap */ 1359 /*----------------------------------------*/ 1360 1361 static FRESULT change_bitmap ( 1362 FATFS* fs, /* Filesystem object */ 1363 DWORD clst, /* Cluster number to change from */ 1364 DWORD ncl, /* Number of clusters to be changed */ 1365 int bv /* bit value to be set (0 or 1) */ 1366 ) 1367 { 1368 BYTE bm; 1369 UINT i; 1370 LBA_t sect; 1371 1372 1373 clst -= 2; /* The first bit corresponds to cluster #2 */ 1374 sect = fs->bitbase + clst / 8 / SS(fs); /* Sector address */ 1375 i = clst / 8 % SS(fs); /* Byte offset in the sector */ 1376 bm = 1 << (clst % 8); /* Bit mask in the byte */ 1377 for (;;) { 1378 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR; 1379 do { 1380 do { 1381 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */ 1382 fs->win[i] ^= bm; /* Flip the bit */ 1383 fs->wflag = 1; 1384 if (--ncl == 0) return FR_OK; /* All bits processed? */ 1385 } while (bm <<= 1); /* Next bit */ 1386 bm = 1; 1387 } while (++i < SS(fs)); /* Next byte */ 1388 i = 0; 1389 } 1390 } 1391 1392 1393 /*---------------------------------------------*/ 1394 /* Fill the first fragment of the FAT chain */ 1395 /*---------------------------------------------*/ 1396 1397 static FRESULT fill_first_frag ( 1398 FFOBJID* obj /* Pointer to the corresponding object */ 1399 ) 1400 { 1401 FRESULT res; 1402 DWORD cl, n; 1403 1404 1405 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */ 1406 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */ 1407 res = put_fat(obj->fs, cl, cl + 1); 1408 if (res != FR_OK) return res; 1409 } 1410 obj->stat = 0; /* Change status 'FAT chain is valid' */ 1411 } 1412 return FR_OK; 1413 } 1414 1415 1416 /*---------------------------------------------*/ 1417 /* Fill the last fragment of the FAT chain */ 1418 /*---------------------------------------------*/ 1419 1420 static FRESULT fill_last_frag ( 1421 FFOBJID* obj, /* Pointer to the corresponding object */ 1422 DWORD lcl, /* Last cluster of the fragment */ 1423 DWORD term /* Value to set the last FAT entry */ 1424 ) 1425 { 1426 FRESULT res; 1427 1428 1429 while (obj->n_frag > 0) { /* Create the chain of last fragment */ 1430 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term); 1431 if (res != FR_OK) return res; 1432 obj->n_frag--; 1433 } 1434 return FR_OK; 1435 } 1436 1437 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */ 1438 1439 1440 1441 #if !FF_FS_READONLY 1442 /*-----------------------------------------------------------------------*/ 1443 /* FAT handling - Remove a cluster chain */ 1444 /*-----------------------------------------------------------------------*/ 1445 1446 static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ 1447 FFOBJID* obj, /* Corresponding object */ 1448 DWORD clst, /* Cluster to remove a chain from */ 1449 DWORD pclst /* Previous cluster of clst (0 if entire chain) */ 1450 ) 1451 { 1452 FRESULT res = FR_OK; 1453 DWORD nxt; 1454 FATFS *fs = obj->fs; 1455 #if FF_FS_EXFAT || FF_USE_TRIM 1456 DWORD scl = clst, ecl = clst; 1457 #endif 1458 #if FF_USE_TRIM 1459 LBA_t rt[2]; 1460 #endif 1461 1462 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */ 1463 1464 /* Mark the previous cluster 'EOC' on the FAT if it exists */ 1465 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) { 1466 res = put_fat(fs, pclst, 0xFFFFFFFF); 1467 if (res != FR_OK) return res; 1468 } 1469 1470 /* Remove the chain */ 1471 do { 1472 nxt = get_fat(obj, clst); /* Get cluster status */ 1473 if (nxt == 0) break; /* Empty cluster? */ 1474 if (nxt == 1) return FR_INT_ERR; /* Internal error? */ 1475 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */ 1476 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { 1477 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */ 1478 if (res != FR_OK) return res; 1479 } 1480 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ 1481 fs->free_clst++; 1482 fs->fsi_flag |= 1; 1483 } 1484 #if FF_FS_EXFAT || FF_USE_TRIM 1485 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 1486 ecl = nxt; 1487 } else { /* End of contiguous cluster block */ 1488 #if FF_FS_EXFAT 1489 if (fs->fs_type == FS_EXFAT) { 1490 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */ 1491 if (res != FR_OK) return res; 1492 } 1493 #endif 1494 #if FF_USE_TRIM 1495 rt[0] = clst2sect(fs, scl); /* Start of data area to be freed */ 1496 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area to be freed */ 1497 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform storage device that the data in the block may be erased */ 1498 #endif 1499 scl = ecl = nxt; 1500 } 1501 #endif 1502 clst = nxt; /* Next cluster */ 1503 } while (clst < fs->n_fatent); /* Repeat while not the last link */ 1504 1505 #if FF_FS_EXFAT 1506 /* Some post processes for chain status */ 1507 if (fs->fs_type == FS_EXFAT) { 1508 if (pclst == 0) { /* Has the entire chain been removed? */ 1509 obj->stat = 0; /* Change the chain status 'initial' */ 1510 } else { 1511 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */ 1512 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */ 1513 while (clst != pclst) { 1514 nxt = get_fat(obj, clst); 1515 if (nxt < 2) return FR_INT_ERR; 1516 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; 1517 if (nxt != clst + 1) break; /* Not contiguous? */ 1518 clst++; 1519 } 1520 if (clst == pclst) { /* Has the chain got contiguous again? */ 1521 obj->stat = 2; /* Change the chain status 'contiguous' */ 1522 } 1523 } else { 1524 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */ 1525 obj->stat = 2; /* Change the chain status 'contiguous' */ 1526 } 1527 } 1528 } 1529 } 1530 #endif 1531 return FR_OK; 1532 } 1533 1534 1535 1536 1537 /*-----------------------------------------------------------------------*/ 1538 /* FAT handling - Stretch a chain or Create a new chain */ 1539 /*-----------------------------------------------------------------------*/ 1540 1541 static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 1542 FFOBJID* obj, /* Corresponding object */ 1543 DWORD clst /* Cluster# to stretch, 0:Create a new chain */ 1544 ) 1545 { 1546 DWORD cs, ncl, scl; 1547 FRESULT res; 1548 FATFS *fs = obj->fs; 1549 1550 1551 if (clst == 0) { /* Create a new chain */ 1552 scl = fs->last_clst; /* Suggested cluster to start to find */ 1553 if (scl == 0 || scl >= fs->n_fatent) scl = 1; 1554 } 1555 else { /* Stretch a chain */ 1556 cs = get_fat(obj, clst); /* Check the cluster status */ 1557 if (cs < 2) return 1; /* Test for insanity */ 1558 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */ 1559 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 1560 scl = clst; /* Cluster to start to find */ 1561 } 1562 if (fs->free_clst == 0) return 0; /* No free cluster */ 1563 1564 #if FF_FS_EXFAT 1565 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 1566 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */ 1567 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */ 1568 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */ 1569 if (res == FR_INT_ERR) return 1; 1570 if (res == FR_DISK_ERR) return 0xFFFFFFFF; 1571 if (clst == 0) { /* Is it a new chain? */ 1572 obj->stat = 2; /* Set status 'contiguous' */ 1573 } else { /* It is a stretched chain */ 1574 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */ 1575 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */ 1576 obj->stat = 3; /* Change status 'just fragmented' */ 1577 } 1578 } 1579 if (obj->stat != 2) { /* Is the file non-contiguous? */ 1580 if (ncl == clst + 1) { /* Is the cluster next to previous one? */ 1581 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */ 1582 } else { /* New fragment */ 1583 if (obj->n_frag == 0) obj->n_frag = 1; 1584 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */ 1585 if (res == FR_OK) obj->n_frag = 1; 1586 } 1587 } 1588 } else 1589 #endif 1590 { /* On the FAT/FAT32 volume */ 1591 ncl = 0; 1592 if (scl == clst) { /* Stretching an existing chain? */ 1593 ncl = scl + 1; /* Test if next cluster is free */ 1594 if (ncl >= fs->n_fatent) ncl = 2; 1595 cs = get_fat(obj, ncl); /* Get next cluster status */ 1596 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */ 1597 if (cs != 0) { /* Not free? */ 1598 cs = fs->last_clst; /* Start at suggested cluster if it is valid */ 1599 if (cs >= 2 && cs < fs->n_fatent) scl = cs; 1600 ncl = 0; 1601 } 1602 } 1603 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */ 1604 ncl = scl; /* Start cluster */ 1605 for (;;) { 1606 ncl++; /* Next cluster */ 1607 if (ncl >= fs->n_fatent) { /* Check wrap-around */ 1608 ncl = 2; 1609 if (ncl > scl) return 0; /* No free cluster found? */ 1610 } 1611 cs = get_fat(obj, ncl); /* Get the cluster status */ 1612 if (cs == 0) break; /* Found a free cluster? */ 1613 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */ 1614 if (ncl == scl) return 0; /* No free cluster found? */ 1615 } 1616 } 1617 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */ 1618 if (res == FR_OK && clst != 0) { 1619 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */ 1620 } 1621 } 1622 1623 if (res == FR_OK) { /* Update FSINFO if function succeeded. */ 1624 fs->last_clst = ncl; 1625 if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--; 1626 fs->fsi_flag |= 1; 1627 } else { 1628 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */ 1629 } 1630 1631 return ncl; /* Return new cluster number or error status */ 1632 } 1633 1634 #endif /* !FF_FS_READONLY */ 1635 1636 1637 1638 1639 #if FF_USE_FASTSEEK 1640 /*-----------------------------------------------------------------------*/ 1641 /* FAT handling - Convert offset into cluster with link map table */ 1642 /*-----------------------------------------------------------------------*/ 1643 1644 static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 1645 FIL* fp, /* Pointer to the file object */ 1646 FSIZE_t ofs /* File offset to be converted to cluster# */ 1647 ) 1648 { 1649 DWORD cl, ncl, *tbl; 1650 FATFS *fs = fp->obj.fs; 1651 1652 1653 tbl = fp->cltbl + 1; /* Top of CLMT */ 1654 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */ 1655 for (;;) { 1656 ncl = *tbl++; /* Number of cluters in the fragment */ 1657 if (ncl == 0) return 0; /* End of table? (error) */ 1658 if (cl < ncl) break; /* In this fragment? */ 1659 cl -= ncl; tbl++; /* Next fragment */ 1660 } 1661 return cl + *tbl; /* Return the cluster number */ 1662 } 1663 1664 #endif /* FF_USE_FASTSEEK */ 1665 1666 1667 1668 1669 /*-----------------------------------------------------------------------*/ 1670 /* Directory handling - Fill a cluster with zeros */ 1671 /*-----------------------------------------------------------------------*/ 1672 1673 #if !FF_FS_READONLY 1674 static FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */ 1675 FATFS *fs, /* Filesystem object */ 1676 DWORD clst /* Directory table to clear */ 1677 ) 1678 { 1679 LBA_t sect; 1680 UINT n, szb; 1681 BYTE *ibuf; 1682 1683 1684 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */ 1685 sect = clst2sect(fs, clst); /* Top of the cluster */ 1686 fs->winsect = sect; /* Set window to top of the cluster */ 1687 mem_set(fs->win, 0, sizeof fs->win); /* Clear window buffer */ 1688 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */ 1689 /* Allocate a temporary buffer */ 1690 for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs), ibuf = 0; szb > SS(fs) && (ibuf = ff_memalloc(szb)) == 0; szb /= 2) ; 1691 if (szb > SS(fs)) { /* Buffer allocated? */ 1692 mem_set(ibuf, 0, szb); 1693 szb /= SS(fs); /* Bytes -> Sectors */ 1694 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */ 1695 ff_memfree(ibuf); 1696 } else 1697 #endif 1698 { 1699 ibuf = fs->win; szb = 1; /* Use window buffer (many single-sector writes may take a time) */ 1700 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */ 1701 } 1702 return (n == fs->csize) ? FR_OK : FR_DISK_ERR; 1703 } 1704 #endif /* !FF_FS_READONLY */ 1705 1706 1707 1708 1709 /*-----------------------------------------------------------------------*/ 1710 /* Directory handling - Set directory index */ 1711 /*-----------------------------------------------------------------------*/ 1712 1713 static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ 1714 DIR* dp, /* Pointer to directory object */ 1715 DWORD ofs /* Offset of directory table */ 1716 ) 1717 { 1718 DWORD csz, clst; 1719 FATFS *fs = dp->obj.fs; 1720 1721 1722 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */ 1723 return FR_INT_ERR; 1724 } 1725 dp->dptr = ofs; /* Set current offset */ 1726 clst = dp->obj.sclust; /* Table start cluster (0:root) */ 1727 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */ 1728 clst = (DWORD)fs->dirbase; 1729 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */ 1730 } 1731 1732 if (clst == 0) { /* Static table (root-directory on the FAT volume) */ 1733 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */ 1734 dp->sect = fs->dirbase; 1735 1736 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */ 1737 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */ 1738 while (ofs >= csz) { /* Follow cluster chain */ 1739 clst = get_fat(&dp->obj, clst); /* Get next cluster */ 1740 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1741 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */ 1742 ofs -= csz; 1743 } 1744 dp->sect = clst2sect(fs, clst); 1745 } 1746 dp->clust = clst; /* Current cluster# */ 1747 if (dp->sect == 0) return FR_INT_ERR; 1748 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */ 1749 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */ 1750 1751 return FR_OK; 1752 } 1753 1754 1755 1756 1757 /*-----------------------------------------------------------------------*/ 1758 /* Directory handling - Move directory table index next */ 1759 /*-----------------------------------------------------------------------*/ 1760 1761 static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 1762 DIR* dp, /* Pointer to the directory object */ 1763 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 1764 ) 1765 { 1766 DWORD ofs, clst; 1767 FATFS *fs = dp->obj.fs; 1768 1769 1770 ofs = dp->dptr + SZDIRE; /* Next entry */ 1771 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) dp->sect = 0; /* Disable it if the offset reached the max value */ 1772 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */ 1773 1774 if (ofs % SS(fs) == 0) { /* Sector changed? */ 1775 dp->sect++; /* Next sector */ 1776 1777 if (dp->clust == 0) { /* Static table */ 1778 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */ 1779 dp->sect = 0; return FR_NO_FILE; 1780 } 1781 } 1782 else { /* Dynamic table */ 1783 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */ 1784 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */ 1785 if (clst <= 1) return FR_INT_ERR; /* Internal error */ 1786 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1787 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */ 1788 #if !FF_FS_READONLY 1789 if (!stretch) { /* If no stretch, report EOT */ 1790 dp->sect = 0; return FR_NO_FILE; 1791 } 1792 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */ 1793 if (clst == 0) return FR_DENIED; /* No free cluster */ 1794 if (clst == 1) return FR_INT_ERR; /* Internal error */ 1795 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 1796 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */ 1797 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */ 1798 #else 1799 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */ 1800 dp->sect = 0; return FR_NO_FILE; /* Report EOT */ 1801 #endif 1802 } 1803 dp->clust = clst; /* Initialize data for new cluster */ 1804 dp->sect = clst2sect(fs, clst); 1805 } 1806 } 1807 } 1808 dp->dptr = ofs; /* Current entry */ 1809 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */ 1810 1811 return FR_OK; 1812 } 1813 1814 1815 1816 1817 #if !FF_FS_READONLY 1818 /*-----------------------------------------------------------------------*/ 1819 /* Directory handling - Reserve a block of directory entries */ 1820 /*-----------------------------------------------------------------------*/ 1821 1822 static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 1823 DIR* dp, /* Pointer to the directory object */ 1824 UINT nent /* Number of contiguous entries to allocate */ 1825 ) 1826 { 1827 FRESULT res; 1828 UINT n; 1829 FATFS *fs = dp->obj.fs; 1830 1831 1832 res = dir_sdi(dp, 0); 1833 if (res == FR_OK) { 1834 n = 0; 1835 do { 1836 res = move_window(fs, dp->sect); 1837 if (res != FR_OK) break; 1838 #if FF_FS_EXFAT 1839 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { 1840 #else 1841 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { 1842 #endif 1843 if (++n == nent) break; /* A block of contiguous free entries is found */ 1844 } else { 1845 n = 0; /* Not a blank entry. Restart to search */ 1846 } 1847 res = dir_next(dp, 1); 1848 } while (res == FR_OK); /* Next entry with table stretch enabled */ 1849 } 1850 1851 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 1852 return res; 1853 } 1854 1855 #endif /* !FF_FS_READONLY */ 1856 1857 1858 1859 1860 /*-----------------------------------------------------------------------*/ 1861 /* FAT: Directory handling - Load/Store start cluster number */ 1862 /*-----------------------------------------------------------------------*/ 1863 1864 static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 1865 FATFS* fs, /* Pointer to the fs object */ 1866 const BYTE* dir /* Pointer to the key entry */ 1867 ) 1868 { 1869 DWORD cl; 1870 1871 cl = ld_word(dir + DIR_FstClusLO); 1872 if (fs->fs_type == FS_FAT32) { 1873 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16; 1874 } 1875 1876 return cl; 1877 } 1878 1879 1880 #if !FF_FS_READONLY 1881 static void st_clust ( 1882 FATFS* fs, /* Pointer to the fs object */ 1883 BYTE* dir, /* Pointer to the key entry */ 1884 DWORD cl /* Value to be set */ 1885 ) 1886 { 1887 st_word(dir + DIR_FstClusLO, (WORD)cl); 1888 if (fs->fs_type == FS_FAT32) { 1889 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16)); 1890 } 1891 } 1892 #endif 1893 1894 1895 1896 #if FF_USE_LFN 1897 /*--------------------------------------------------------*/ 1898 /* FAT-LFN: Compare a part of file name with an LFN entry */ 1899 /*--------------------------------------------------------*/ 1900 1901 static int cmp_lfn ( /* 1:matched, 0:not matched */ 1902 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 1903 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 1904 ) 1905 { 1906 UINT i, s; 1907 WCHAR wc, uc; 1908 1909 1910 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 1911 1912 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 1913 1914 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1915 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 1916 if (wc != 0) { 1917 if (i >= FF_MAX_LFN + 1 || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */ 1918 return 0; /* Not matched */ 1919 } 1920 wc = uc; 1921 } else { 1922 if (uc != 0xFFFF) return 0; /* Check filler */ 1923 } 1924 } 1925 1926 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */ 1927 1928 return 1; /* The part of LFN matched */ 1929 } 1930 1931 1932 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 1933 /*-----------------------------------------------------*/ 1934 /* FAT-LFN: Pick a part of file name from an LFN entry */ 1935 /*-----------------------------------------------------*/ 1936 1937 static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 1938 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 1939 BYTE* dir /* Pointer to the LFN entry */ 1940 ) 1941 { 1942 UINT i, s; 1943 WCHAR wc, uc; 1944 1945 1946 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */ 1947 1948 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */ 1949 1950 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 1951 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 1952 if (wc != 0) { 1953 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */ 1954 lfnbuf[i++] = wc = uc; /* Store it */ 1955 } else { 1956 if (uc != 0xFFFF) return 0; /* Check filler */ 1957 } 1958 } 1959 1960 if (dir[LDIR_Ord] & LLEF && wc != 0) { /* Put terminator if it is the last LFN part and not terminated */ 1961 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */ 1962 lfnbuf[i] = 0; 1963 } 1964 1965 return 1; /* The part of LFN is valid */ 1966 } 1967 #endif 1968 1969 1970 #if !FF_FS_READONLY 1971 /*-----------------------------------------*/ 1972 /* FAT-LFN: Create an entry of LFN entries */ 1973 /*-----------------------------------------*/ 1974 1975 static void put_lfn ( 1976 const WCHAR* lfn, /* Pointer to the LFN */ 1977 BYTE* dir, /* Pointer to the LFN entry to be created */ 1978 BYTE ord, /* LFN order (1-20) */ 1979 BYTE sum /* Checksum of the corresponding SFN */ 1980 ) 1981 { 1982 UINT i, s; 1983 WCHAR wc; 1984 1985 1986 dir[LDIR_Chksum] = sum; /* Set checksum */ 1987 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 1988 dir[LDIR_Type] = 0; 1989 st_word(dir + LDIR_FstClusLO, 0); 1990 1991 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 1992 s = wc = 0; 1993 do { 1994 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */ 1995 st_word(dir + LfnOfs[s], wc); /* Put it */ 1996 if (wc == 0) wc = 0xFFFF; /* Padding characters for following items */ 1997 } while (++s < 13); 1998 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */ 1999 dir[LDIR_Ord] = ord; /* Set the LFN order */ 2000 } 2001 2002 #endif /* !FF_FS_READONLY */ 2003 #endif /* FF_USE_LFN */ 2004 2005 2006 2007 #if FF_USE_LFN && !FF_FS_READONLY 2008 /*-----------------------------------------------------------------------*/ 2009 /* FAT-LFN: Create a Numbered SFN */ 2010 /*-----------------------------------------------------------------------*/ 2011 2012 static void gen_numname ( 2013 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 2014 const BYTE* src, /* Pointer to SFN */ 2015 const WCHAR* lfn, /* Pointer to LFN */ 2016 UINT seq /* Sequence number */ 2017 ) 2018 { 2019 BYTE ns[8], c; 2020 UINT i, j; 2021 WCHAR wc; 2022 DWORD sreg; 2023 2024 2025 mem_cpy(dst, src, 11); 2026 2027 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */ 2028 sreg = seq; 2029 while (*lfn) { /* Create a CRC as hash value */ 2030 wc = *lfn++; 2031 for (i = 0; i < 16; i++) { 2032 sreg = (sreg << 1) + (wc & 1); 2033 wc >>= 1; 2034 if (sreg & 0x10000) sreg ^= 0x11021; 2035 } 2036 } 2037 seq = (UINT)sreg; 2038 } 2039 2040 /* itoa (hexdecimal) */ 2041 i = 7; 2042 do { 2043 c = (BYTE)((seq % 16) + '0'); 2044 if (c > '9') c += 7; 2045 ns[i--] = c; 2046 seq /= 16; 2047 } while (seq); 2048 ns[i] = '~'; 2049 2050 /* Append the number to the SFN body */ 2051 for (j = 0; j < i && dst[j] != ' '; j++) { 2052 if (dbc_1st(dst[j])) { 2053 if (j == i - 1) break; 2054 j++; 2055 } 2056 } 2057 do { 2058 dst[j++] = (i < 8) ? ns[i++] : ' '; 2059 } while (j < 8); 2060 } 2061 #endif /* FF_USE_LFN && !FF_FS_READONLY */ 2062 2063 2064 2065 #if FF_USE_LFN 2066 /*-----------------------------------------------------------------------*/ 2067 /* FAT-LFN: Calculate checksum of an SFN entry */ 2068 /*-----------------------------------------------------------------------*/ 2069 2070 static BYTE sum_sfn ( 2071 const BYTE* dir /* Pointer to the SFN entry */ 2072 ) 2073 { 2074 BYTE sum = 0; 2075 UINT n = 11; 2076 2077 do { 2078 sum = (sum >> 1) + (sum << 7) + *dir++; 2079 } while (--n); 2080 return sum; 2081 } 2082 2083 #endif /* FF_USE_LFN */ 2084 2085 2086 2087 #if FF_FS_EXFAT 2088 /*-----------------------------------------------------------------------*/ 2089 /* exFAT: Checksum */ 2090 /*-----------------------------------------------------------------------*/ 2091 2092 static WORD xdir_sum ( /* Get checksum of the directoly entry block */ 2093 const BYTE* dir /* Directory entry block to be calculated */ 2094 ) 2095 { 2096 UINT i, szblk; 2097 WORD sum; 2098 2099 2100 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; /* Number of bytes of the entry block */ 2101 for (i = sum = 0; i < szblk; i++) { 2102 if (i == XDIR_SetSum) { /* Skip 2-byte sum field */ 2103 i++; 2104 } else { 2105 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i]; 2106 } 2107 } 2108 return sum; 2109 } 2110 2111 2112 2113 static WORD xname_sum ( /* Get check sum (to be used as hash) of the file name */ 2114 const WCHAR* name /* File name to be calculated */ 2115 ) 2116 { 2117 WCHAR chr; 2118 WORD sum = 0; 2119 2120 2121 while ((chr = *name++) != 0) { 2122 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be up-case converted */ 2123 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF); 2124 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8); 2125 } 2126 return sum; 2127 } 2128 2129 2130 #if !FF_FS_READONLY && FF_USE_MKFS 2131 static DWORD xsum32 ( /* Returns 32-bit checksum */ 2132 BYTE dat, /* Byte to be calculated (byte-by-byte processing) */ 2133 DWORD sum /* Previous sum value */ 2134 ) 2135 { 2136 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat; 2137 return sum; 2138 } 2139 #endif 2140 2141 2142 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 2143 /*------------------------------------------------------*/ 2144 /* exFAT: Get object information from a directory block */ 2145 /*------------------------------------------------------*/ 2146 2147 static void get_xfileinfo ( 2148 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */ 2149 FILINFO* fno /* Buffer to store the extracted file information */ 2150 ) 2151 { 2152 WCHAR wc, hs; 2153 UINT di, si, nc; 2154 2155 /* Get file name from the entry block */ 2156 si = SZDIRE * 2; /* 1st C1 entry */ 2157 nc = 0; hs = 0; di = 0; 2158 while (nc < dirb[XDIR_NumName]) { 2159 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */ 2160 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ 2161 wc = ld_word(dirb + si); si += 2; nc++; /* Get a character */ 2162 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 2163 hs = wc; continue; /* Get low surrogate */ 2164 } 2165 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */ 2166 if (wc == 0) { di = 0; break; } /* Buffer overflow or wrong encoding? */ 2167 di += wc; 2168 hs = 0; 2169 } 2170 if (hs != 0) di = 0; /* Broken surrogate pair? */ 2171 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */ 2172 fno->fname[di] = 0; /* Terminate the name */ 2173 fno->altname[0] = 0; /* exFAT does not support SFN */ 2174 2175 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */ 2176 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */ 2177 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */ 2178 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */ 2179 } 2180 2181 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 2182 2183 2184 /*-----------------------------------*/ 2185 /* exFAT: Get a directry entry block */ 2186 /*-----------------------------------*/ 2187 2188 static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */ 2189 DIR* dp /* Reading direcotry object pointing top of the entry block to load */ 2190 ) 2191 { 2192 FRESULT res; 2193 UINT i, sz_ent; 2194 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */ 2195 2196 2197 /* Load file-directory entry */ 2198 res = move_window(dp->obj.fs, dp->sect); 2199 if (res != FR_OK) return res; 2200 if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR; /* Invalid order */ 2201 mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE); 2202 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE; 2203 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR; 2204 2205 /* Load stream-extension entry */ 2206 res = dir_next(dp, 0); 2207 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 2208 if (res != FR_OK) return res; 2209 res = move_window(dp->obj.fs, dp->sect); 2210 if (res != FR_OK) return res; 2211 if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR; /* Invalid order */ 2212 mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE); 2213 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR; 2214 2215 /* Load file-name entries */ 2216 i = 2 * SZDIRE; /* Name offset to load */ 2217 do { 2218 res = dir_next(dp, 0); 2219 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 2220 if (res != FR_OK) return res; 2221 res = move_window(dp->obj.fs, dp->sect); 2222 if (res != FR_OK) return res; 2223 if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR; /* Invalid order */ 2224 if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE); 2225 } while ((i += SZDIRE) < sz_ent); 2226 2227 /* Sanity check (do it for only accessible object) */ 2228 if (i <= MAXDIRB(FF_MAX_LFN)) { 2229 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR; 2230 } 2231 return FR_OK; 2232 } 2233 2234 2235 /*------------------------------------------------------------------*/ 2236 /* exFAT: Initialize object allocation info with loaded entry block */ 2237 /*------------------------------------------------------------------*/ 2238 2239 static void init_alloc_info ( 2240 FATFS* fs, /* Filesystem object */ 2241 FFOBJID* obj /* Object allocation information to be initialized */ 2242 ) 2243 { 2244 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */ 2245 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */ 2246 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */ 2247 obj->n_frag = 0; /* No last fragment info */ 2248 } 2249 2250 2251 2252 #if !FF_FS_READONLY || FF_FS_RPATH != 0 2253 /*------------------------------------------------*/ 2254 /* exFAT: Load the object's directory entry block */ 2255 /*------------------------------------------------*/ 2256 2257 static FRESULT load_obj_xdir ( 2258 DIR* dp, /* Blank directory object to be used to access containing direcotry */ 2259 const FFOBJID* obj /* Object with its containing directory information */ 2260 ) 2261 { 2262 FRESULT res; 2263 2264 /* Open object containing directory */ 2265 dp->obj.fs = obj->fs; 2266 dp->obj.sclust = obj->c_scl; 2267 dp->obj.stat = (BYTE)obj->c_size; 2268 dp->obj.objsize = obj->c_size & 0xFFFFFF00; 2269 dp->obj.n_frag = 0; 2270 dp->blk_ofs = obj->c_ofs; 2271 2272 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */ 2273 if (res == FR_OK) { 2274 res = load_xdir(dp); /* Load the object's entry block */ 2275 } 2276 return res; 2277 } 2278 #endif 2279 2280 2281 #if !FF_FS_READONLY 2282 /*----------------------------------------*/ 2283 /* exFAT: Store the directory entry block */ 2284 /*----------------------------------------*/ 2285 2286 static FRESULT store_xdir ( 2287 DIR* dp /* Pointer to the direcotry object */ 2288 ) 2289 { 2290 FRESULT res; 2291 UINT nent; 2292 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */ 2293 2294 /* Create set sum */ 2295 st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); 2296 nent = dirb[XDIR_NumSec] + 1; 2297 2298 /* Store the direcotry entry block to the directory */ 2299 res = dir_sdi(dp, dp->blk_ofs); 2300 while (res == FR_OK) { 2301 res = move_window(dp->obj.fs, dp->sect); 2302 if (res != FR_OK) break; 2303 mem_cpy(dp->dir, dirb, SZDIRE); 2304 dp->obj.fs->wflag = 1; 2305 if (--nent == 0) break; 2306 dirb += SZDIRE; 2307 res = dir_next(dp, 0); 2308 } 2309 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR; 2310 } 2311 2312 2313 2314 /*-------------------------------------------*/ 2315 /* exFAT: Create a new directory enrty block */ 2316 /*-------------------------------------------*/ 2317 2318 static void create_xdir ( 2319 BYTE* dirb, /* Pointer to the direcotry entry block buffer */ 2320 const WCHAR* lfn /* Pointer to the object name */ 2321 ) 2322 { 2323 UINT i; 2324 BYTE nc1, nlen; 2325 WCHAR wc; 2326 2327 2328 /* Create file-directory and stream-extension entry */ 2329 mem_set(dirb, 0, 2 * SZDIRE); 2330 dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR; 2331 dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM; 2332 2333 /* Create file-name entries */ 2334 i = SZDIRE * 2; /* Top of file_name entries */ 2335 nlen = nc1 = 0; wc = 1; 2336 do { 2337 dirb[i++] = ET_FILENAME; dirb[i++] = 0; 2338 do { /* Fill name field */ 2339 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */ 2340 st_word(dirb + i, wc); /* Store it */ 2341 i += 2; 2342 } while (i % SZDIRE != 0); 2343 nc1++; 2344 } while (lfn[nlen]); /* Fill next entry if any char follows */ 2345 2346 dirb[XDIR_NumName] = nlen; /* Set name length */ 2347 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */ 2348 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */ 2349 } 2350 2351 #endif /* !FF_FS_READONLY */ 2352 #endif /* FF_FS_EXFAT */ 2353 2354 2355 2356 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 2357 /*-----------------------------------------------------------------------*/ 2358 /* Read an object from the directory */ 2359 /*-----------------------------------------------------------------------*/ 2360 2361 #define DIR_READ_FILE(dp) dir_read(dp, 0) 2362 #define DIR_READ_LABEL(dp) dir_read(dp, 1) 2363 2364 static FRESULT dir_read ( 2365 DIR* dp, /* Pointer to the directory object */ 2366 int vol /* Filtered by 0:file/directory or 1:volume label */ 2367 ) 2368 { 2369 FRESULT res = FR_NO_FILE; 2370 FATFS *fs = dp->obj.fs; 2371 BYTE attr, b; 2372 #if FF_USE_LFN 2373 BYTE ord = 0xFF, sum = 0xFF; 2374 #endif 2375 2376 while (dp->sect) { 2377 res = move_window(fs, dp->sect); 2378 if (res != FR_OK) break; 2379 b = dp->dir[DIR_Name]; /* Test for the entry type */ 2380 if (b == 0) { 2381 res = FR_NO_FILE; break; /* Reached to end of the directory */ 2382 } 2383 #if FF_FS_EXFAT 2384 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2385 if (FF_USE_LABEL && vol) { 2386 if (b == ET_VLABEL) break; /* Volume label entry? */ 2387 } else { 2388 if (b == ET_FILEDIR) { /* Start of the file entry block? */ 2389 dp->blk_ofs = dp->dptr; /* Get location of the block */ 2390 res = load_xdir(dp); /* Load the entry block */ 2391 if (res == FR_OK) { 2392 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */ 2393 } 2394 break; 2395 } 2396 } 2397 } else 2398 #endif 2399 { /* On the FAT/FAT32 volume */ 2400 dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */ 2401 #if FF_USE_LFN /* LFN configuration */ 2402 if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 2403 ord = 0xFF; 2404 } else { 2405 if (attr == AM_LFN) { /* An LFN entry is found */ 2406 if (b & LLEF) { /* Is it start of an LFN sequence? */ 2407 sum = dp->dir[LDIR_Chksum]; 2408 b &= (BYTE)~LLEF; ord = b; 2409 dp->blk_ofs = dp->dptr; 2410 } 2411 /* Check LFN validity and capture it */ 2412 ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 2413 } else { /* An SFN entry is found */ 2414 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */ 2415 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */ 2416 } 2417 break; 2418 } 2419 } 2420 #else /* Non LFN configuration */ 2421 if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */ 2422 break; 2423 } 2424 #endif 2425 } 2426 res = dir_next(dp, 0); /* Next entry */ 2427 if (res != FR_OK) break; 2428 } 2429 2430 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */ 2431 return res; 2432 } 2433 2434 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */ 2435 2436 2437 2438 /*-----------------------------------------------------------------------*/ 2439 /* Directory handling - Find an object in the directory */ 2440 /*-----------------------------------------------------------------------*/ 2441 2442 static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 2443 DIR* dp /* Pointer to the directory object with the file name */ 2444 ) 2445 { 2446 FRESULT res; 2447 FATFS *fs = dp->obj.fs; 2448 BYTE c; 2449 #if FF_USE_LFN 2450 BYTE a, ord, sum; 2451 #endif 2452 2453 res = dir_sdi(dp, 0); /* Rewind directory object */ 2454 if (res != FR_OK) return res; 2455 #if FF_FS_EXFAT 2456 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2457 BYTE nc; 2458 UINT di, ni; 2459 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */ 2460 2461 while ((res = DIR_READ_FILE(dp)) == FR_OK) { /* Read an item */ 2462 #if FF_MAX_LFN < 255 2463 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */ 2464 #endif 2465 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */ 2466 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */ 2467 if ((di % SZDIRE) == 0) di += 2; 2468 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break; 2469 } 2470 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */ 2471 } 2472 return res; 2473 } 2474 #endif 2475 /* On the FAT/FAT32 volume */ 2476 #if FF_USE_LFN 2477 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2478 #endif 2479 do { 2480 res = move_window(fs, dp->sect); 2481 if (res != FR_OK) break; 2482 c = dp->dir[DIR_Name]; 2483 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 2484 #if FF_USE_LFN /* LFN configuration */ 2485 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; 2486 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 2487 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2488 } else { 2489 if (a == AM_LFN) { /* An LFN entry is found */ 2490 if (!(dp->fn[NSFLAG] & NS_NOLFN)) { 2491 if (c & LLEF) { /* Is it start of LFN sequence? */ 2492 sum = dp->dir[LDIR_Chksum]; 2493 c &= (BYTE)~LLEF; ord = c; /* LFN start order */ 2494 dp->blk_ofs = dp->dptr; /* Start offset of LFN */ 2495 } 2496 /* Check validity of the LFN entry and compare it with given name */ 2497 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 2498 } 2499 } else { /* An SFN entry is found */ 2500 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */ 2501 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */ 2502 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 2503 } 2504 } 2505 #else /* Non LFN configuration */ 2506 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK; 2507 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */ 2508 #endif 2509 res = dir_next(dp, 0); /* Next entry */ 2510 } while (res == FR_OK); 2511 2512 return res; 2513 } 2514 2515 2516 2517 2518 #if !FF_FS_READONLY 2519 /*-----------------------------------------------------------------------*/ 2520 /* Register an object to the directory */ 2521 /*-----------------------------------------------------------------------*/ 2522 2523 static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 2524 DIR* dp /* Target directory with object name to be created */ 2525 ) 2526 { 2527 FRESULT res; 2528 FATFS *fs = dp->obj.fs; 2529 #if FF_USE_LFN /* LFN configuration */ 2530 UINT n, nlen, nent; 2531 BYTE sn[12], sum; 2532 2533 2534 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */ 2535 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */ 2536 2537 #if FF_FS_EXFAT 2538 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2539 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */ 2540 res = dir_alloc(dp, nent); /* Allocate directory entries */ 2541 if (res != FR_OK) return res; 2542 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */ 2543 2544 if (dp->obj.stat & 4) { /* Has the directory been stretched by new allocation? */ 2545 dp->obj.stat &= ~4; 2546 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */ 2547 if (res != FR_OK) return res; 2548 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */ 2549 if (res != FR_OK) return res; 2550 if (dp->obj.sclust != 0) { /* Is it a sub-directory? */ 2551 DIR dj; 2552 2553 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */ 2554 if (res != FR_OK) return res; 2555 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */ 2556 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); 2557 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize); 2558 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; /* Update the allocation status */ 2559 res = store_xdir(&dj); /* Store the object status */ 2560 if (res != FR_OK) return res; 2561 } 2562 } 2563 2564 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */ 2565 return FR_OK; 2566 } 2567 #endif 2568 /* On the FAT/FAT32 volume */ 2569 mem_cpy(sn, dp->fn, 12); 2570 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 2571 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */ 2572 for (n = 1; n < 100; n++) { 2573 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */ 2574 res = dir_find(dp); /* Check if the name collides with existing SFN */ 2575 if (res != FR_OK) break; 2576 } 2577 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 2578 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 2579 dp->fn[NSFLAG] = sn[NSFLAG]; 2580 } 2581 2582 /* Create an SFN with/without LFNs. */ 2583 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */ 2584 res = dir_alloc(dp, nent); /* Allocate entries */ 2585 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 2586 res = dir_sdi(dp, dp->dptr - nent * SZDIRE); 2587 if (res == FR_OK) { 2588 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 2589 do { /* Store LFN entries in bottom first */ 2590 res = move_window(fs, dp->sect); 2591 if (res != FR_OK) break; 2592 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum); 2593 fs->wflag = 1; 2594 res = dir_next(dp, 0); /* Next entry */ 2595 } while (res == FR_OK && --nent); 2596 } 2597 } 2598 2599 #else /* Non LFN configuration */ 2600 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 2601 2602 #endif 2603 2604 /* Set SFN entry */ 2605 if (res == FR_OK) { 2606 res = move_window(fs, dp->sect); 2607 if (res == FR_OK) { 2608 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */ 2609 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */ 2610 #if FF_USE_LFN 2611 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 2612 #endif 2613 fs->wflag = 1; 2614 } 2615 } 2616 2617 return res; 2618 } 2619 2620 #endif /* !FF_FS_READONLY */ 2621 2622 2623 2624 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0 2625 /*-----------------------------------------------------------------------*/ 2626 /* Remove an object from the directory */ 2627 /*-----------------------------------------------------------------------*/ 2628 2629 static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 2630 DIR* dp /* Directory object pointing the entry to be removed */ 2631 ) 2632 { 2633 FRESULT res; 2634 FATFS *fs = dp->obj.fs; 2635 #if FF_USE_LFN /* LFN configuration */ 2636 DWORD last = dp->dptr; 2637 2638 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */ 2639 if (res == FR_OK) { 2640 do { 2641 res = move_window(fs, dp->sect); 2642 if (res != FR_OK) break; 2643 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2644 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */ 2645 } else { /* On the FAT/FAT32 volume */ 2646 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */ 2647 } 2648 fs->wflag = 1; 2649 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */ 2650 res = dir_next(dp, 0); /* Next entry */ 2651 } while (res == FR_OK); 2652 if (res == FR_NO_FILE) res = FR_INT_ERR; 2653 } 2654 #else /* Non LFN configuration */ 2655 2656 res = move_window(fs, dp->sect); 2657 if (res == FR_OK) { 2658 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/ 2659 fs->wflag = 1; 2660 } 2661 #endif 2662 2663 return res; 2664 } 2665 2666 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */ 2667 2668 2669 2670 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 2671 /*-----------------------------------------------------------------------*/ 2672 /* Get file information from directory entry */ 2673 /*-----------------------------------------------------------------------*/ 2674 2675 static void get_fileinfo ( 2676 DIR* dp, /* Pointer to the directory object */ 2677 FILINFO* fno /* Pointer to the file information to be filled */ 2678 ) 2679 { 2680 UINT si, di; 2681 #if FF_USE_LFN 2682 BYTE lcf; 2683 WCHAR wc, hs; 2684 FATFS *fs = dp->obj.fs; 2685 #else 2686 TCHAR c; 2687 #endif 2688 2689 2690 fno->fname[0] = 0; /* Invaidate file info */ 2691 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */ 2692 2693 #if FF_USE_LFN /* LFN configuration */ 2694 #if FF_FS_EXFAT 2695 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 2696 get_xfileinfo(fs->dirbuf, fno); 2697 return; 2698 } else 2699 #endif 2700 { /* On the FAT/FAT32 volume */ 2701 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */ 2702 si = di = hs = 0; 2703 while (fs->lfnbuf[si] != 0) { 2704 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */ 2705 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 2706 hs = wc; continue; /* Get low surrogate */ 2707 } 2708 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */ 2709 if (wc == 0) { di = 0; break; } /* Invalid char or buffer overflow? */ 2710 di += wc; 2711 hs = 0; 2712 } 2713 if (hs != 0) di = 0; /* Broken surrogate pair? */ 2714 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */ 2715 } 2716 } 2717 2718 si = di = 0; 2719 while (si < 11) { /* Get SFN from SFN entry */ 2720 wc = dp->dir[si++]; /* Get a char */ 2721 if (wc == ' ') continue; /* Skip padding spaces */ 2722 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */ 2723 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */ 2724 #if FF_LFN_UNICODE >= 1 /* Unicode output */ 2725 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */ 2726 wc = wc << 8 | dp->dir[si++]; 2727 } 2728 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */ 2729 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */ 2730 wc = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in Unicode */ 2731 if (wc == 0) { di = 0; break; } /* Buffer overflow? */ 2732 di += wc; 2733 #else /* ANSI/OEM output */ 2734 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */ 2735 #endif 2736 } 2737 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */ 2738 2739 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */ 2740 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */ 2741 fno->fname[di++] = '?'; 2742 } else { 2743 for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */ 2744 wc = (WCHAR)fno->altname[si]; 2745 if (wc == '.') lcf = NS_EXT; 2746 if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20; 2747 fno->fname[di] = (TCHAR)wc; 2748 } 2749 } 2750 fno->fname[di] = 0; /* Terminate the LFN */ 2751 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */ 2752 } 2753 2754 #else /* Non-LFN configuration */ 2755 si = di = 0; 2756 while (si < 11) { /* Copy name body and extension */ 2757 c = (TCHAR)dp->dir[si++]; 2758 if (c == ' ') continue; /* Skip padding spaces */ 2759 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */ 2760 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */ 2761 fno->fname[di++] = c; 2762 } 2763 fno->fname[di] = 0; 2764 #endif 2765 2766 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */ 2767 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */ 2768 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */ 2769 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */ 2770 } 2771 2772 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 2773 2774 2775 2776 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1 2777 /*-----------------------------------------------------------------------*/ 2778 /* Pattern matching */ 2779 /*-----------------------------------------------------------------------*/ 2780 2781 static DWORD get_achar ( /* Get a character and advances ptr */ 2782 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */ 2783 ) 2784 { 2785 DWORD chr; 2786 2787 2788 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */ 2789 chr = tchar2uni(ptr); 2790 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */ 2791 chr = ff_wtoupper(chr); 2792 2793 #else /* ANSI/OEM input */ 2794 chr = (BYTE)*(*ptr)++; /* Get a byte */ 2795 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 2796 #if FF_CODE_PAGE == 0 2797 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 2798 #elif FF_CODE_PAGE < 900 2799 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 2800 #endif 2801 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900 2802 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */ 2803 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0; 2804 } 2805 #endif 2806 2807 #endif 2808 return chr; 2809 } 2810 2811 2812 static int pattern_matching ( /* 0:not matched, 1:matched */ 2813 const TCHAR* pat, /* Matching pattern */ 2814 const TCHAR* nam, /* String to be tested */ 2815 int skip, /* Number of pre-skip chars (number of ?s) */ 2816 int inf /* Infinite search (* specified) */ 2817 ) 2818 { 2819 const TCHAR *pp, *np; 2820 DWORD pc, nc; 2821 int nm, nx; 2822 2823 2824 while (skip--) { /* Pre-skip name chars */ 2825 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 2826 } 2827 if (*pat == 0 && inf) return 1; /* (short circuit) */ 2828 2829 do { 2830 pp = pat; np = nam; /* Top of pattern and name to match */ 2831 for (;;) { 2832 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 2833 nm = nx = 0; 2834 do { /* Analyze the wildcard block */ 2835 if (*pp++ == '?') nm++; else nx = 1; 2836 } while (*pp == '?' || *pp == '*'); 2837 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 2838 nc = *np; break; /* Branch mismatched */ 2839 } 2840 pc = get_achar(&pp); /* Get a pattern char */ 2841 nc = get_achar(&np); /* Get a name char */ 2842 if (pc != nc) break; /* Branch mismatched? */ 2843 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */ 2844 } 2845 get_achar(&nam); /* nam++ */ 2846 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 2847 2848 return 0; 2849 } 2850 2851 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */ 2852 2853 2854 2855 /*-----------------------------------------------------------------------*/ 2856 /* Pick a top segment and create the object name in directory form */ 2857 /*-----------------------------------------------------------------------*/ 2858 2859 static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 2860 DIR* dp, /* Pointer to the directory object */ 2861 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 2862 ) 2863 { 2864 #if FF_USE_LFN /* LFN configuration */ 2865 BYTE b, cf; 2866 WCHAR wc, *lfn; 2867 DWORD uc; 2868 UINT i, ni, si, di; 2869 const TCHAR *p; 2870 2871 2872 /* Create LFN into LFN working buffer */ 2873 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0; 2874 for (;;) { 2875 uc = tchar2uni(&p); /* Get a character */ 2876 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */ 2877 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */ 2878 wc = (WCHAR)uc; 2879 if (wc < ' ' || wc == '/' || wc == '\\') break; /* Break if end of the path or a separator is found */ 2880 if (wc < 0x80 && chk_chr("\"*:<>\?|\x7F", wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */ 2881 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */ 2882 lfn[di++] = wc; /* Store the Unicode character */ 2883 } 2884 if (wc < ' ') { /* End of path? */ 2885 cf = NS_LAST; /* Set last segment flag */ 2886 } else { 2887 cf = 0; /* Next segment follows */ 2888 while (*p == '/' || *p == '\\') p++; /* Skip duplicated separators if exist */ 2889 } 2890 *path = p; /* Return pointer to the next segment */ 2891 2892 #if FF_FS_RPATH != 0 2893 if ((di == 1 && lfn[di - 1] == '.') || 2894 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */ 2895 lfn[di] = 0; 2896 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */ 2897 dp->fn[i] = (i < di) ? '.' : ' '; 2898 } 2899 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 2900 return FR_OK; 2901 } 2902 #endif 2903 while (di) { /* Snip off trailing spaces and dots if exist */ 2904 wc = lfn[di - 1]; 2905 if (wc != ' ' && wc != '.') break; 2906 di--; 2907 } 2908 lfn[di] = 0; /* LFN is created into the working buffer */ 2909 if (di == 0) return FR_INVALID_NAME; /* Reject null name */ 2910 2911 /* Create SFN in directory form */ 2912 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */ 2913 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */ 2914 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */ 2915 2916 mem_set(dp->fn, ' ', 11); 2917 i = b = 0; ni = 8; 2918 for (;;) { 2919 wc = lfn[si++]; /* Get an LFN character */ 2920 if (wc == 0) break; /* Break on end of the LFN */ 2921 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */ 2922 cf |= NS_LOSS | NS_LFN; 2923 continue; 2924 } 2925 2926 if (i >= ni || si == di) { /* End of field? */ 2927 if (ni == 11) { /* Name extension overflow? */ 2928 cf |= NS_LOSS | NS_LFN; 2929 break; 2930 } 2931 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */ 2932 if (si > di) break; /* No name extension? */ 2933 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */ 2934 continue; 2935 } 2936 2937 if (wc >= 0x80) { /* Is this a non-ASCII character? */ 2938 cf |= NS_LFN; /* LFN entry needs to be created */ 2939 #if FF_CODE_PAGE == 0 2940 if (ExCvt) { /* At SBCS */ 2941 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 2942 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 2943 } else { /* At DBCS */ 2944 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 2945 } 2946 #elif FF_CODE_PAGE < 900 /* SBCS cfg */ 2947 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 2948 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 2949 #else /* DBCS cfg */ 2950 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 2951 #endif 2952 } 2953 2954 if (wc >= 0x100) { /* Is this a DBC? */ 2955 if (i >= ni - 1) { /* Field overflow? */ 2956 cf |= NS_LOSS | NS_LFN; 2957 i = ni; continue; /* Next field */ 2958 } 2959 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */ 2960 } else { /* SBC */ 2961 if (wc == 0 || chk_chr("+,;=[]", wc)) { /* Replace illegal characters for SFN if needed */ 2962 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 2963 } else { 2964 if (IsUpper(wc)) { /* ASCII upper case? */ 2965 b |= 2; 2966 } 2967 if (IsLower(wc)) { /* ASCII lower case? */ 2968 b |= 1; wc -= 0x20; 2969 } 2970 } 2971 } 2972 dp->fn[i++] = (BYTE)wc; 2973 } 2974 2975 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 2976 2977 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */ 2978 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */ 2979 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 2980 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */ 2981 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */ 2982 } 2983 2984 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */ 2985 2986 return FR_OK; 2987 2988 2989 #else /* FF_USE_LFN : Non-LFN configuration */ 2990 BYTE c, d, *sfn; 2991 UINT ni, si, i; 2992 const char *p; 2993 2994 /* Create file name in directory form */ 2995 p = *path; sfn = dp->fn; 2996 mem_set(sfn, ' ', 11); 2997 si = i = 0; ni = 8; 2998 #if FF_FS_RPATH != 0 2999 if (p[si] == '.') { /* Is this a dot entry? */ 3000 for (;;) { 3001 c = (BYTE)p[si++]; 3002 if (c != '.' || si >= 3) break; 3003 sfn[i++] = c; 3004 } 3005 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 3006 *path = p + si; /* Return pointer to the next segment */ 3007 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */ 3008 return FR_OK; 3009 } 3010 #endif 3011 for (;;) { 3012 c = (BYTE)p[si++]; /* Get a byte */ 3013 if (c <= ' ') break; /* Break if end of the path name */ 3014 if (c == '/' || c == '\\') { /* Break if a separator is found */ 3015 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ 3016 break; 3017 } 3018 if (c == '.' || i >= ni) { /* End of body or field overflow? */ 3019 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */ 3020 i = 8; ni = 11; /* Enter file extension field */ 3021 continue; 3022 } 3023 #if FF_CODE_PAGE == 0 3024 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */ 3025 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 3026 } 3027 #elif FF_CODE_PAGE < 900 3028 if (c >= 0x80) { /* Is SBC extended character? */ 3029 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 3030 } 3031 #endif 3032 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */ 3033 d = (BYTE)p[si++]; /* Get 2nd byte */ 3034 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */ 3035 sfn[i++] = c; 3036 sfn[i++] = d; 3037 } else { /* SBC */ 3038 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */ 3039 if (IsLower(c)) c -= 0x20; /* To upper */ 3040 sfn[i++] = c; 3041 } 3042 } 3043 *path = p + si; /* Return pointer to the next segment */ 3044 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */ 3045 3046 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 3047 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 3048 3049 return FR_OK; 3050 #endif /* FF_USE_LFN */ 3051 } 3052 3053 3054 3055 3056 /*-----------------------------------------------------------------------*/ 3057 /* Follow a file path */ 3058 /*-----------------------------------------------------------------------*/ 3059 3060 static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 3061 DIR* dp, /* Directory object to return last directory and found object */ 3062 const TCHAR* path /* Full-path string to find a file or directory */ 3063 ) 3064 { 3065 FRESULT res; 3066 BYTE ns; 3067 FATFS *fs = dp->obj.fs; 3068 3069 3070 #if FF_FS_RPATH != 0 3071 if (*path != '/' && *path != '\\') { /* Without heading separator */ 3072 dp->obj.sclust = fs->cdir; /* Start from current directory */ 3073 } else 3074 #endif 3075 { /* With heading separator */ 3076 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */ 3077 dp->obj.sclust = 0; /* Start from root directory */ 3078 } 3079 #if FF_FS_EXFAT 3080 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */ 3081 #if FF_FS_RPATH != 0 3082 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */ 3083 DIR dj; 3084 3085 dp->obj.c_scl = fs->cdc_scl; 3086 dp->obj.c_size = fs->cdc_size; 3087 dp->obj.c_ofs = fs->cdc_ofs; 3088 res = load_obj_xdir(&dj, &dp->obj); 3089 if (res != FR_OK) return res; 3090 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize); 3091 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 3092 } 3093 #endif 3094 #endif 3095 3096 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 3097 dp->fn[NSFLAG] = NS_NONAME; 3098 res = dir_sdi(dp, 0); 3099 3100 } else { /* Follow path */ 3101 for (;;) { 3102 res = create_name(dp, &path); /* Get a segment name of the path */ 3103 if (res != FR_OK) break; 3104 res = dir_find(dp); /* Find an object with the segment name */ 3105 ns = dp->fn[NSFLAG]; 3106 if (res != FR_OK) { /* Failed to find the object */ 3107 if (res == FR_NO_FILE) { /* Object is not found */ 3108 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */ 3109 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 3110 dp->fn[NSFLAG] = NS_NONAME; 3111 res = FR_OK; 3112 } else { /* Could not find the object */ 3113 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 3114 } 3115 } 3116 break; 3117 } 3118 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 3119 /* Get into the sub-directory */ 3120 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 3121 res = FR_NO_PATH; break; 3122 } 3123 #if FF_FS_EXFAT 3124 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */ 3125 dp->obj.c_scl = dp->obj.sclust; 3126 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 3127 dp->obj.c_ofs = dp->blk_ofs; 3128 init_alloc_info(fs, &dp->obj); /* Open next directory */ 3129 } else 3130 #endif 3131 { 3132 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */ 3133 } 3134 } 3135 } 3136 3137 return res; 3138 } 3139 3140 3141 3142 3143 /*-----------------------------------------------------------------------*/ 3144 /* Get logical drive number from path name */ 3145 /*-----------------------------------------------------------------------*/ 3146 3147 static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive number or null pointer) */ 3148 const TCHAR** path /* Pointer to pointer to the path name */ 3149 ) 3150 { 3151 const TCHAR *tp, *tt; 3152 TCHAR tc; 3153 int i, vol = -1; 3154 #if FF_STR_VOLUME_ID /* Find string volume ID */ 3155 const char *sp; 3156 char c; 3157 #endif 3158 3159 tt = tp = *path; 3160 if (!tp) return vol; /* Invalid path name? */ 3161 do tc = *tt++; while ((UINT)tc >= (FF_USE_LFN ? ' ' : '!') && tc != ':'); /* Find a colon in the path */ 3162 3163 if (tc == ':') { /* DOS/Windows style volume ID? */ 3164 i = FF_VOLUMES; 3165 if (IsDigit(*tp) && tp + 2 == tt) { /* Is there a numeric volume ID + colon? */ 3166 i = (int)*tp - '0'; /* Get the LD number */ 3167 } 3168 #if FF_STR_VOLUME_ID == 1 /* Arbitrary string is enabled */ 3169 else { 3170 i = 0; 3171 do { 3172 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */ 3173 do { /* Compare the volume ID with path name */ 3174 c = *sp++; tc = *tp++; 3175 if (IsLower(c)) c -= 0x20; 3176 if (IsLower(tc)) tc -= 0x20; 3177 } while (c && (TCHAR)c == tc); 3178 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */ 3179 } 3180 #endif 3181 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */ 3182 vol = i; /* Drive number */ 3183 *path = tt; /* Snip the drive prefix off */ 3184 } 3185 return vol; 3186 } 3187 #if FF_STR_VOLUME_ID == 2 /* Unix style volume ID is enabled */ 3188 if (*tp == '/') { 3189 i = 0; 3190 do { 3191 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */ 3192 do { /* Compare the volume ID with path name */ 3193 c = *sp++; tc = *(++tp); 3194 if (IsLower(c)) c -= 0x20; 3195 if (IsLower(tc)) tc -= 0x20; 3196 } while (c && (TCHAR)c == tc); 3197 } while ((c || (tc != '/' && (UINT)tc >= (FF_USE_LFN ? ' ' : '!'))) && ++i < FF_VOLUMES); /* Repeat for each ID until pattern match */ 3198 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */ 3199 vol = i; /* Drive number */ 3200 *path = tp; /* Snip the drive prefix off */ 3201 return vol; 3202 } 3203 } 3204 #endif 3205 /* No drive prefix is found */ 3206 #if FF_FS_RPATH != 0 3207 vol = CurrVol; /* Default drive is current drive */ 3208 #else 3209 vol = 0; /* Default drive is 0 */ 3210 #endif 3211 return vol; /* Return the default drive */ 3212 } 3213 3214 3215 3216 3217 /*-----------------------------------------------------------------------*/ 3218 /* GPT support functions */ 3219 /*-----------------------------------------------------------------------*/ 3220 3221 #if FF_LBA64 3222 3223 /* Calculate CRC32 in byte-by-byte */ 3224 3225 static DWORD crc32 ( /* Returns next CRC value */ 3226 DWORD crc, /* Current CRC value */ 3227 BYTE d /* A byte to be processed */ 3228 ) 3229 { 3230 BYTE b; 3231 3232 3233 for (b = 1; b; b <<= 1) { 3234 crc ^= (d & b) ? 1 : 0; 3235 crc = (crc & 1) ? crc >> 1 ^ 0xEDB88320 : crc >> 1; 3236 } 3237 return crc; 3238 } 3239 3240 3241 /* Check validity of GPT header */ 3242 3243 static int test_gpt_header ( /* 0:Invalid, 1:Valid */ 3244 const BYTE* gpth /* Pointer to the GPT header */ 3245 ) 3246 { 3247 UINT i; 3248 DWORD bcc; 3249 3250 3251 if (mem_cmp(gpth + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16)) return 0; /* Check sign, version (1.0) and length (92) */ 3252 for (i = 0, bcc = 0xFFFFFFFF; i < 92; i++) { /* Check header BCC */ 3253 bcc = crc32(bcc, i - GPTH_Bcc < 4 ? 0 : gpth[i]); 3254 } 3255 if (~bcc != ld_dword(gpth + GPTH_Bcc)) return 0; 3256 if (ld_dword(gpth + GPTH_PteSize) != SZ_GPTE) return 0; /* Table entry size (must be SZ_GPTE bytes) */ 3257 if (ld_dword(gpth + GPTH_PtNum) > 128) return 0; /* Table size (must be 128 entries or less) */ 3258 3259 return 1; 3260 } 3261 3262 #if !FF_FS_READONLY && FF_USE_MKFS 3263 3264 /* Generate random value */ 3265 static DWORD make_rand ( 3266 DWORD seed, /* Seed value */ 3267 BYTE* buff, /* Output buffer */ 3268 UINT n /* Data length */ 3269 ) 3270 { 3271 UINT r; 3272 3273 3274 if (seed == 0) seed = 1; 3275 do { 3276 for (r = 0; r < 8; r++) seed = seed & 1 ? seed >> 1 ^ 0xA3000000 : seed >> 1; /* Shift 8 bits the 32-bit LFSR */ 3277 *buff++ = (BYTE)seed; 3278 } while (--n); 3279 return seed; 3280 } 3281 3282 #endif 3283 #endif 3284 3285 3286 3287 /*-----------------------------------------------------------------------*/ 3288 /* Load a sector and check if it is an FAT VBR */ 3289 /*-----------------------------------------------------------------------*/ 3290 3291 /* Check what the sector is */ 3292 3293 static UINT check_fs ( /* 0:FAT VBR, 1:exFAT VBR, 2:Valid BS but not FAT, 3:Invalid BS, 4:Disk error */ 3294 FATFS* fs, /* Filesystem object */ 3295 LBA_t sect /* Sector to load and check if it is an FAT-VBR or not */ 3296 ) 3297 { 3298 fs->wflag = 0; fs->winsect = (LBA_t)0 - 1; /* Invaidate window */ 3299 if (move_window(fs, sect) != FR_OK) return 4; /* Load the boot sector */ 3300 3301 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot signature (always here regardless of the sector size) */ 3302 3303 if (FF_FS_EXFAT && !mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */ 3304 3305 if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) { /* Valid JumpBoot code? */ 3306 if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */ 3307 if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */ 3308 } 3309 return 2; /* Valid BS but not FAT */ 3310 } 3311 3312 3313 /* Find an FAT volume */ 3314 /* (It supports only generic partitioning rules, MBR, GPT and SFD) */ 3315 3316 static UINT find_volume ( /* Returns BS status found in the hosting drive */ 3317 FATFS* fs, /* Filesystem object */ 3318 UINT part /* Partition to fined = 0:auto, 1..:forced */ 3319 ) 3320 { 3321 UINT fmt, i; 3322 DWORD mbr_pt[4]; 3323 3324 3325 fmt = check_fs(fs, 0); /* Load sector 0 and check if it is an FAT VBR as SFD */ 3326 if (fmt != 2 && (fmt >= 3 || part == 0)) return fmt; /* Returns if it is a FAT VBR as auto scan, not a BS or disk error */ 3327 3328 /* Sector 0 is not an FAT VBR or forced partition number wants a partition */ 3329 3330 #if FF_LBA64 3331 if (fs->win[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */ 3332 DWORD n_ent, v_ent, ofs; 3333 QWORD pt_lba; 3334 3335 if (move_window(fs, 1) != FR_OK) return 4; /* Load GPT header sector (next to MBR) */ 3336 if (!test_gpt_header(fs->win)) return 3; /* Check if GPT header is valid */ 3337 n_ent = ld_dword(fs->win + GPTH_PtNum); /* Number of entries */ 3338 pt_lba = ld_qword(fs->win + GPTH_PtOfs); /* Table location */ 3339 for (v_ent = i = 0; i < n_ent; i++) { /* Find FAT partition */ 3340 if (move_window(fs, pt_lba + i * SZ_GPTE / SS(fs)) != FR_OK) return 4; /* PT sector */ 3341 ofs = i * SZ_GPTE % SS(fs); /* Offset in the sector */ 3342 if (!mem_cmp(fs->win + ofs + GPTE_PtGuid, GUID_MS_Basic, 16)) { /* MS basic data partition? */ 3343 v_ent++; 3344 fmt = check_fs(fs, ld_qword(fs->win + ofs + GPTE_FstLba)); /* Load VBR and check status */ 3345 if (part == 0 && fmt <= 1) return fmt; /* Auto search (valid FAT volume found first) */ 3346 if (part != 0 && v_ent == part) return fmt; /* Forced partition order (regardless of it is valid or not) */ 3347 } 3348 } 3349 return 3; /* Not found */ 3350 } 3351 #endif 3352 if (FF_MULTI_PARTITION && part > 4) return 3; /* MBR has 4 partitions max */ 3353 for (i = 0; i < 4; i++) { /* Load partition offset in the MBR */ 3354 mbr_pt[i] = ld_dword(fs->win + MBR_Table + i * SZ_PTE + PTE_StLba); 3355 } 3356 i = part ? part - 1 : 0; /* Table index to find first */ 3357 do { /* Find an FAT volume */ 3358 fmt = mbr_pt[i] ? check_fs(fs, mbr_pt[i]) : 3; /* Check if the partition is FAT */ 3359 } while (part == 0 && fmt >= 2 && ++i < 4); 3360 return fmt; 3361 } 3362 3363 3364 3365 3366 /*-----------------------------------------------------------------------*/ 3367 /* Determine logical drive number and mount the volume if needed */ 3368 /*-----------------------------------------------------------------------*/ 3369 3370 static FRESULT mount_volume ( /* FR_OK(0): successful, !=0: an error occurred */ 3371 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 3372 FATFS** rfs, /* Pointer to pointer to the found filesystem object */ 3373 BYTE mode /* !=0: Check write protection for write access */ 3374 ) 3375 { 3376 int vol; 3377 DSTATUS stat; 3378 LBA_t bsect; 3379 DWORD tsect, sysect, fasize, nclst, szbfat; 3380 WORD nrsv; 3381 FATFS *fs; 3382 UINT fmt; 3383 3384 3385 /* Get logical drive number */ 3386 *rfs = 0; 3387 vol = get_ldnumber(path); 3388 if (vol < 0) return FR_INVALID_DRIVE; 3389 3390 /* Check if the filesystem object is valid or not */ 3391 fs = FatFs[vol]; /* Get pointer to the filesystem object */ 3392 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */ 3393 #if FF_FS_REENTRANT 3394 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */ 3395 #endif 3396 *rfs = fs; /* Return pointer to the filesystem object */ 3397 3398 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */ 3399 if (fs->fs_type != 0) { /* If the volume has been mounted */ 3400 stat = disk_status(fs->pdrv); 3401 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 3402 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */ 3403 return FR_WRITE_PROTECTED; 3404 } 3405 return FR_OK; /* The filesystem object is already valid */ 3406 } 3407 } 3408 3409 /* The filesystem object is not valid. */ 3410 /* Following code attempts to mount the volume. (find a FAT volume, analyze the BPB and initialize the filesystem object) */ 3411 3412 fs->fs_type = 0; /* Clear the filesystem object */ 3413 fs->pdrv = LD2PD(vol); /* Volume hosting physical drive */ 3414 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */ 3415 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */ 3416 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 3417 } 3418 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */ 3419 return FR_WRITE_PROTECTED; 3420 } 3421 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */ 3422 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR; 3423 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR; 3424 #endif 3425 3426 /* Find an FAT volume on the drive */ 3427 fmt = find_volume(fs, LD2PT(vol)); 3428 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 3429 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 3430 bsect = fs->winsect; /* Volume location */ 3431 3432 /* An FAT volume is found (bsect). Following code initializes the filesystem object */ 3433 3434 #if FF_FS_EXFAT 3435 if (fmt == 1) { 3436 QWORD maxlba; 3437 DWORD so, cv, bcl, i; 3438 3439 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */ 3440 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM; 3441 3442 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */ 3443 3444 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */ 3445 return FR_NO_FILESYSTEM; 3446 } 3447 3448 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */ 3449 if (!FF_LBA64 && maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */ 3450 3451 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */ 3452 3453 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */ 3454 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */ 3455 3456 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */ 3457 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */ 3458 3459 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */ 3460 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */ 3461 fs->n_fatent = nclst + 2; 3462 3463 /* Boundaries and Limits */ 3464 fs->volbase = bsect; 3465 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx); 3466 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx); 3467 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */ 3468 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx); 3469 3470 /* Get bitmap location and check if it is contiguous (implementation assumption) */ 3471 so = i = 0; 3472 for (;;) { /* Find the bitmap entry in the root directory (in only first cluster) */ 3473 if (i == 0) { 3474 if (so >= fs->csize) return FR_NO_FILESYSTEM; /* Not found? */ 3475 if (move_window(fs, clst2sect(fs, (DWORD)fs->dirbase) + so) != FR_OK) return FR_DISK_ERR; 3476 so++; 3477 } 3478 if (fs->win[i] == ET_BITMAP) break; /* Is it a bitmap entry? */ 3479 i = (i + SZDIRE) % SS(fs); /* Next entry */ 3480 } 3481 bcl = ld_dword(fs->win + i + 20); /* Bitmap cluster */ 3482 if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM; 3483 fs->bitbase = fs->database + fs->csize * (bcl - 2); /* Bitmap sector */ 3484 for (;;) { /* Check if bitmap is contiguous */ 3485 if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR; 3486 cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4); 3487 if (cv == 0xFFFFFFFF) break; /* Last link? */ 3488 if (cv != ++bcl) return FR_NO_FILESYSTEM; /* Fragmented? */ 3489 } 3490 3491 #if !FF_FS_READONLY 3492 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 3493 #endif 3494 fmt = FS_EXFAT; /* FAT sub-type */ 3495 } else 3496 #endif /* FF_FS_EXFAT */ 3497 { 3498 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */ 3499 3500 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 3501 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32); 3502 fs->fsize = fasize; 3503 3504 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */ 3505 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 3506 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 3507 3508 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */ 3509 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 3510 3511 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 3512 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */ 3513 3514 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 3515 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32); 3516 3517 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 3518 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 3519 3520 /* Determine the FAT sub type */ 3521 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */ 3522 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 3523 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 3524 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 3525 fmt = 0; 3526 if (nclst <= MAX_FAT32) fmt = FS_FAT32; 3527 if (nclst <= MAX_FAT16) fmt = FS_FAT16; 3528 if (nclst <= MAX_FAT12) fmt = FS_FAT12; 3529 if (fmt == 0) return FR_NO_FILESYSTEM; 3530 3531 /* Boundaries and Limits */ 3532 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 3533 fs->volbase = bsect; /* Volume start sector */ 3534 fs->fatbase = bsect + nrsv; /* FAT start sector */ 3535 fs->database = bsect + sysect; /* Data start sector */ 3536 if (fmt == FS_FAT32) { 3537 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */ 3538 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 3539 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */ 3540 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 3541 } else { 3542 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 3543 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 3544 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 3545 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 3546 } 3547 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */ 3548 3549 #if !FF_FS_READONLY 3550 /* Get FSInfo if available */ 3551 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 3552 fs->fsi_flag = 0x80; 3553 #if (FF_FS_NOFSINFO & 3) != 3 3554 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */ 3555 && ld_word(fs->win + BPB_FSInfo32) == 1 3556 && move_window(fs, bsect + 1) == FR_OK) 3557 { 3558 fs->fsi_flag = 0; 3559 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */ 3560 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252 3561 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272) 3562 { 3563 #if (FF_FS_NOFSINFO & 1) == 0 3564 fs->free_clst = ld_dword(fs->win + FSI_Free_Count); 3565 #endif 3566 #if (FF_FS_NOFSINFO & 2) == 0 3567 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free); 3568 #endif 3569 } 3570 } 3571 #endif /* (FF_FS_NOFSINFO & 3) != 3 */ 3572 #endif /* !FF_FS_READONLY */ 3573 } 3574 3575 fs->fs_type = (BYTE)fmt;/* FAT sub-type */ 3576 fs->id = ++Fsid; /* Volume mount ID */ 3577 #if FF_USE_LFN == 1 3578 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */ 3579 #if FF_FS_EXFAT 3580 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */ 3581 #endif 3582 #endif 3583 #if FF_FS_RPATH != 0 3584 fs->cdir = 0; /* Initialize current directory */ 3585 #endif 3586 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */ 3587 clear_lock(fs); 3588 #endif 3589 return FR_OK; 3590 } 3591 3592 3593 3594 3595 /*-----------------------------------------------------------------------*/ 3596 /* Check if the file/directory object is valid or not */ 3597 /*-----------------------------------------------------------------------*/ 3598 3599 static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */ 3600 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/DIR object, to check validity */ 3601 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */ 3602 ) 3603 { 3604 FRESULT res = FR_INVALID_OBJECT; 3605 3606 3607 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */ 3608 #if FF_FS_REENTRANT 3609 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */ 3610 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 3611 res = FR_OK; 3612 } else { 3613 unlock_fs(obj->fs, FR_OK); 3614 } 3615 } else { 3616 res = FR_TIMEOUT; 3617 } 3618 #else 3619 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 3620 res = FR_OK; 3621 } 3622 #endif 3623 } 3624 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */ 3625 return res; 3626 } 3627 3628 3629 3630 3631 /*--------------------------------------------------------------------------- 3632 3633 Public Functions (FatFs API) 3634 3635 ----------------------------------------------------------------------------*/ 3636 3637 3638 3639 /*-----------------------------------------------------------------------*/ 3640 /* Mount/Unmount a Logical Drive */ 3641 /*-----------------------------------------------------------------------*/ 3642 3643 FRESULT f_mount ( 3644 FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/ 3645 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 3646 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */ 3647 ) 3648 { 3649 FATFS *cfs; 3650 int vol; 3651 FRESULT res; 3652 const TCHAR *rp = path; 3653 3654 3655 /* Get logical drive number */ 3656 vol = get_ldnumber(&rp); 3657 if (vol < 0) return FR_INVALID_DRIVE; 3658 cfs = FatFs[vol]; /* Pointer to fs object */ 3659 3660 if (cfs) { 3661 #if FF_FS_LOCK != 0 3662 clear_lock(cfs); 3663 #endif 3664 #if FF_FS_REENTRANT /* Discard sync object of the current volume */ 3665 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 3666 #endif 3667 cfs->fs_type = 0; /* Clear old fs object */ 3668 } 3669 3670 if (fs) { 3671 fs->fs_type = 0; /* Clear new fs object */ 3672 #if FF_FS_REENTRANT /* Create sync object for the new volume */ 3673 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 3674 #endif 3675 } 3676 FatFs[vol] = fs; /* Register new fs object */ 3677 3678 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */ 3679 3680 res = mount_volume(&path, &fs, 0); /* Force mounted the volume */ 3681 LEAVE_FF(fs, res); 3682 } 3683 3684 3685 3686 3687 /*-----------------------------------------------------------------------*/ 3688 /* Open or Create a File */ 3689 /*-----------------------------------------------------------------------*/ 3690 3691 FRESULT f_open ( 3692 FIL* fp, /* Pointer to the blank file object */ 3693 const TCHAR* path, /* Pointer to the file name */ 3694 BYTE mode /* Access mode and file open mode flags */ 3695 ) 3696 { 3697 FRESULT res; 3698 DIR dj; 3699 FATFS *fs; 3700 #if !FF_FS_READONLY 3701 DWORD cl, bcs, clst; 3702 LBA_t sc; 3703 FSIZE_t ofs; 3704 #endif 3705 DEF_NAMBUF 3706 3707 3708 if (!fp) return FR_INVALID_OBJECT; 3709 3710 /* Get logical drive number */ 3711 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND; 3712 res = mount_volume(&path, &fs, mode); 3713 if (res == FR_OK) { 3714 dj.obj.fs = fs; 3715 INIT_NAMBUF(fs); 3716 res = follow_path(&dj, path); /* Follow the file path */ 3717 #if !FF_FS_READONLY /* Read/Write configuration */ 3718 if (res == FR_OK) { 3719 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ 3720 res = FR_INVALID_NAME; 3721 } 3722 #if FF_FS_LOCK != 0 3723 else { 3724 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */ 3725 } 3726 #endif 3727 } 3728 /* Create or Open a file */ 3729 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 3730 if (res != FR_OK) { /* No file, create new */ 3731 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */ 3732 #if FF_FS_LOCK != 0 3733 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 3734 #else 3735 res = dir_register(&dj); 3736 #endif 3737 } 3738 mode |= FA_CREATE_ALWAYS; /* File is created */ 3739 } 3740 else { /* Any object with the same name is already existing */ 3741 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */ 3742 res = FR_DENIED; 3743 } else { 3744 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */ 3745 } 3746 } 3747 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */ 3748 #if FF_FS_EXFAT 3749 if (fs->fs_type == FS_EXFAT) { 3750 /* Get current allocation info */ 3751 fp->obj.fs = fs; 3752 init_alloc_info(fs, &fp->obj); 3753 /* Set directory entry block initial state */ 3754 mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */ 3755 mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */ 3756 fs->dirbuf[XDIR_Attr] = AM_ARC; 3757 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME()); 3758 fs->dirbuf[XDIR_GenFlags] = 1; 3759 res = store_xdir(&dj); 3760 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */ 3761 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 3762 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */ 3763 } 3764 } else 3765 #endif 3766 { 3767 /* Set directory entry initial state */ 3768 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */ 3769 st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */ 3770 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */ 3771 st_clust(fs, dj.dir, 0); /* Reset file allocation info */ 3772 st_dword(dj.dir + DIR_FileSize, 0); 3773 fs->wflag = 1; 3774 if (cl != 0) { /* Remove the cluster chain if exist */ 3775 sc = fs->winsect; 3776 res = remove_chain(&dj.obj, cl, 0); 3777 if (res == FR_OK) { 3778 res = move_window(fs, sc); 3779 fs->last_clst = cl - 1; /* Reuse the cluster hole */ 3780 } 3781 } 3782 } 3783 } 3784 } 3785 else { /* Open an existing file */ 3786 if (res == FR_OK) { /* Is the object exsiting? */ 3787 if (dj.obj.attr & AM_DIR) { /* File open against a directory */ 3788 res = FR_NO_FILE; 3789 } else { 3790 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */ 3791 res = FR_DENIED; 3792 } 3793 } 3794 } 3795 } 3796 if (res == FR_OK) { 3797 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */ 3798 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */ 3799 fp->dir_ptr = dj.dir; 3800 #if FF_FS_LOCK != 0 3801 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */ 3802 if (fp->obj.lockid == 0) res = FR_INT_ERR; 3803 #endif 3804 } 3805 #else /* R/O configuration */ 3806 if (res == FR_OK) { 3807 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */ 3808 res = FR_INVALID_NAME; 3809 } else { 3810 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */ 3811 res = FR_NO_FILE; 3812 } 3813 } 3814 } 3815 #endif 3816 3817 if (res == FR_OK) { 3818 #if FF_FS_EXFAT 3819 if (fs->fs_type == FS_EXFAT) { 3820 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */ 3821 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 3822 fp->obj.c_ofs = dj.blk_ofs; 3823 init_alloc_info(fs, &fp->obj); 3824 } else 3825 #endif 3826 { 3827 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */ 3828 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize); 3829 } 3830 #if FF_USE_FASTSEEK 3831 fp->cltbl = 0; /* Disable fast seek mode */ 3832 #endif 3833 fp->obj.fs = fs; /* Validate the file object */ 3834 fp->obj.id = fs->id; 3835 fp->flag = mode; /* Set file access mode */ 3836 fp->err = 0; /* Clear error flag */ 3837 fp->sect = 0; /* Invalidate current data sector */ 3838 fp->fptr = 0; /* Set file pointer top of the file */ 3839 #if !FF_FS_READONLY 3840 #if !FF_FS_TINY 3841 mem_set(fp->buf, 0, sizeof fp->buf); /* Clear sector buffer */ 3842 #endif 3843 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */ 3844 fp->fptr = fp->obj.objsize; /* Offset to seek */ 3845 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */ 3846 clst = fp->obj.sclust; /* Follow the cluster chain */ 3847 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) { 3848 clst = get_fat(&fp->obj, clst); 3849 if (clst <= 1) res = FR_INT_ERR; 3850 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR; 3851 } 3852 fp->clust = clst; 3853 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */ 3854 sc = clst2sect(fs, clst); 3855 if (sc == 0) { 3856 res = FR_INT_ERR; 3857 } else { 3858 fp->sect = sc + (DWORD)(ofs / SS(fs)); 3859 #if !FF_FS_TINY 3860 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR; 3861 #endif 3862 } 3863 } 3864 } 3865 #endif 3866 } 3867 3868 FREE_NAMBUF(); 3869 } 3870 3871 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */ 3872 3873 LEAVE_FF(fs, res); 3874 } 3875 3876 3877 3878 3879 /*-----------------------------------------------------------------------*/ 3880 /* Read File */ 3881 /*-----------------------------------------------------------------------*/ 3882 3883 FRESULT f_read ( 3884 FIL* fp, /* Pointer to the file object */ 3885 void* buff, /* Pointer to data buffer */ 3886 UINT btr, /* Number of bytes to read */ 3887 UINT* br /* Pointer to number of bytes read */ 3888 ) 3889 { 3890 FRESULT res; 3891 FATFS *fs; 3892 DWORD clst; 3893 LBA_t sect; 3894 FSIZE_t remain; 3895 UINT rcnt, cc, csect; 3896 BYTE *rbuff = (BYTE*)buff; 3897 3898 3899 *br = 0; /* Clear read byte counter */ 3900 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 3901 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 3902 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 3903 remain = fp->obj.objsize - fp->fptr; 3904 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 3905 3906 for ( ; btr; /* Repeat until btr bytes read */ 3907 btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) { 3908 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 3909 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 3910 if (csect == 0) { /* On the cluster boundary? */ 3911 if (fp->fptr == 0) { /* On the top of the file? */ 3912 clst = fp->obj.sclust; /* Follow cluster chain from the origin */ 3913 } else { /* Middle or end of the file */ 3914 #if FF_USE_FASTSEEK 3915 if (fp->cltbl) { 3916 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 3917 } else 3918 #endif 3919 { 3920 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */ 3921 } 3922 } 3923 if (clst < 2) ABORT(fs, FR_INT_ERR); 3924 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 3925 fp->clust = clst; /* Update current cluster */ 3926 } 3927 sect = clst2sect(fs, fp->clust); /* Get current sector */ 3928 if (sect == 0) ABORT(fs, FR_INT_ERR); 3929 sect += csect; 3930 cc = btr / SS(fs); /* When remaining bytes >= sector size, */ 3931 if (cc > 0) { /* Read maximum contiguous sectors directly */ 3932 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 3933 cc = fs->csize - csect; 3934 } 3935 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 3936 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 3937 #if FF_FS_TINY 3938 if (fs->wflag && fs->winsect - sect < cc) { 3939 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs)); 3940 } 3941 #else 3942 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) { 3943 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs)); 3944 } 3945 #endif 3946 #endif 3947 rcnt = SS(fs) * cc; /* Number of bytes transferred */ 3948 continue; 3949 } 3950 #if !FF_FS_TINY 3951 if (fp->sect != sect) { /* Load data sector if not in cache */ 3952 #if !FF_FS_READONLY 3953 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 3954 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 3955 fp->flag &= (BYTE)~FA_DIRTY; 3956 } 3957 #endif 3958 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 3959 } 3960 #endif 3961 fp->sect = sect; 3962 } 3963 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */ 3964 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */ 3965 #if FF_FS_TINY 3966 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 3967 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 3968 #else 3969 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 3970 #endif 3971 } 3972 3973 LEAVE_FF(fs, FR_OK); 3974 } 3975 3976 3977 3978 3979 #if !FF_FS_READONLY 3980 /*-----------------------------------------------------------------------*/ 3981 /* Write File */ 3982 /*-----------------------------------------------------------------------*/ 3983 3984 FRESULT f_write ( 3985 FIL* fp, /* Pointer to the file object */ 3986 const void* buff, /* Pointer to the data to be written */ 3987 UINT btw, /* Number of bytes to write */ 3988 UINT* bw /* Pointer to number of bytes written */ 3989 ) 3990 { 3991 FRESULT res; 3992 FATFS *fs; 3993 DWORD clst; 3994 LBA_t sect; 3995 UINT wcnt, cc, csect; 3996 const BYTE *wbuff = (const BYTE*)buff; 3997 3998 3999 *bw = 0; /* Clear write byte counter */ 4000 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 4001 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 4002 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 4003 4004 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */ 4005 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) { 4006 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr); 4007 } 4008 4009 for ( ; btw; /* Repeat until all data written */ 4010 btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) { 4011 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 4012 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */ 4013 if (csect == 0) { /* On the cluster boundary? */ 4014 if (fp->fptr == 0) { /* On the top of the file? */ 4015 clst = fp->obj.sclust; /* Follow from the origin */ 4016 if (clst == 0) { /* If no cluster is allocated, */ 4017 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */ 4018 } 4019 } else { /* On the middle or end of the file */ 4020 #if FF_USE_FASTSEEK 4021 if (fp->cltbl) { 4022 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 4023 } else 4024 #endif 4025 { 4026 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */ 4027 } 4028 } 4029 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 4030 if (clst == 1) ABORT(fs, FR_INT_ERR); 4031 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4032 fp->clust = clst; /* Update current cluster */ 4033 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */ 4034 } 4035 #if FF_FS_TINY 4036 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */ 4037 #else 4038 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */ 4039 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 4040 fp->flag &= (BYTE)~FA_DIRTY; 4041 } 4042 #endif 4043 sect = clst2sect(fs, fp->clust); /* Get current sector */ 4044 if (sect == 0) ABORT(fs, FR_INT_ERR); 4045 sect += csect; 4046 cc = btw / SS(fs); /* When remaining bytes >= sector size, */ 4047 if (cc > 0) { /* Write maximum contiguous sectors directly */ 4048 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 4049 cc = fs->csize - csect; 4050 } 4051 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 4052 #if FF_FS_MINIMIZE <= 2 4053 #if FF_FS_TINY 4054 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 4055 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs)); 4056 fs->wflag = 0; 4057 } 4058 #else 4059 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 4060 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs)); 4061 fp->flag &= (BYTE)~FA_DIRTY; 4062 } 4063 #endif 4064 #endif 4065 wcnt = SS(fs) * cc; /* Number of bytes transferred */ 4066 continue; 4067 } 4068 #if FF_FS_TINY 4069 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */ 4070 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); 4071 fs->winsect = sect; 4072 } 4073 #else 4074 if (fp->sect != sect && /* Fill sector cache with file data */ 4075 fp->fptr < fp->obj.objsize && 4076 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) { 4077 ABORT(fs, FR_DISK_ERR); 4078 } 4079 #endif 4080 fp->sect = sect; 4081 } 4082 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */ 4083 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */ 4084 #if FF_FS_TINY 4085 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 4086 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 4087 fs->wflag = 1; 4088 #else 4089 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 4090 fp->flag |= FA_DIRTY; 4091 #endif 4092 } 4093 4094 fp->flag |= FA_MODIFIED; /* Set file change flag */ 4095 4096 LEAVE_FF(fs, FR_OK); 4097 } 4098 4099 4100 4101 4102 /*-----------------------------------------------------------------------*/ 4103 /* Synchronize the File */ 4104 /*-----------------------------------------------------------------------*/ 4105 4106 FRESULT f_sync ( 4107 FIL* fp /* Pointer to the file object */ 4108 ) 4109 { 4110 FRESULT res; 4111 FATFS *fs; 4112 DWORD tm; 4113 BYTE *dir; 4114 4115 4116 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 4117 if (res == FR_OK) { 4118 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */ 4119 #if !FF_FS_TINY 4120 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */ 4121 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR); 4122 fp->flag &= (BYTE)~FA_DIRTY; 4123 } 4124 #endif 4125 /* Update the directory entry */ 4126 tm = GET_FATTIME(); /* Modified time */ 4127 #if FF_FS_EXFAT 4128 if (fs->fs_type == FS_EXFAT) { 4129 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */ 4130 if (res == FR_OK) { 4131 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 4132 } 4133 if (res == FR_OK) { 4134 DIR dj; 4135 DEF_NAMBUF 4136 4137 INIT_NAMBUF(fs); 4138 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */ 4139 if (res == FR_OK) { 4140 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 4141 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */ 4142 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); /* Update start cluster */ 4143 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); /* Update file size */ 4144 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); /* (FatFs does not support Valid File Size feature) */ 4145 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */ 4146 fs->dirbuf[XDIR_ModTime10] = 0; 4147 st_dword(fs->dirbuf + XDIR_AccTime, 0); 4148 res = store_xdir(&dj); /* Restore it to the directory */ 4149 if (res == FR_OK) { 4150 res = sync_fs(fs); 4151 fp->flag &= (BYTE)~FA_MODIFIED; 4152 } 4153 } 4154 FREE_NAMBUF(); 4155 } 4156 } else 4157 #endif 4158 { 4159 res = move_window(fs, fp->dir_sect); 4160 if (res == FR_OK) { 4161 dir = fp->dir_ptr; 4162 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 4163 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */ 4164 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */ 4165 st_dword(dir + DIR_ModTime, tm); /* Update modified time */ 4166 st_word(dir + DIR_LstAccDate, 0); 4167 fs->wflag = 1; 4168 res = sync_fs(fs); /* Restore it to the directory */ 4169 fp->flag &= (BYTE)~FA_MODIFIED; 4170 } 4171 } 4172 } 4173 } 4174 4175 LEAVE_FF(fs, res); 4176 } 4177 4178 #endif /* !FF_FS_READONLY */ 4179 4180 4181 4182 4183 /*-----------------------------------------------------------------------*/ 4184 /* Close File */ 4185 /*-----------------------------------------------------------------------*/ 4186 4187 FRESULT f_close ( 4188 FIL* fp /* Pointer to the file object to be closed */ 4189 ) 4190 { 4191 FRESULT res; 4192 FATFS *fs; 4193 4194 #if !FF_FS_READONLY 4195 res = f_sync(fp); /* Flush cached data */ 4196 if (res == FR_OK) 4197 #endif 4198 { 4199 res = validate(&fp->obj, &fs); /* Lock volume */ 4200 if (res == FR_OK) { 4201 #if FF_FS_LOCK != 0 4202 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */ 4203 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */ 4204 #else 4205 fp->obj.fs = 0; /* Invalidate file object */ 4206 #endif 4207 #if FF_FS_REENTRANT 4208 unlock_fs(fs, FR_OK); /* Unlock volume */ 4209 #endif 4210 } 4211 } 4212 return res; 4213 } 4214 4215 4216 4217 4218 #if FF_FS_RPATH >= 1 4219 /*-----------------------------------------------------------------------*/ 4220 /* Change Current Directory or Current Drive, Get Current Directory */ 4221 /*-----------------------------------------------------------------------*/ 4222 4223 FRESULT f_chdrive ( 4224 const TCHAR* path /* Drive number to set */ 4225 ) 4226 { 4227 int vol; 4228 4229 4230 /* Get logical drive number */ 4231 vol = get_ldnumber(&path); 4232 if (vol < 0) return FR_INVALID_DRIVE; 4233 CurrVol = (BYTE)vol; /* Set it as current volume */ 4234 4235 return FR_OK; 4236 } 4237 4238 4239 4240 FRESULT f_chdir ( 4241 const TCHAR* path /* Pointer to the directory path */ 4242 ) 4243 { 4244 #if FF_STR_VOLUME_ID == 2 4245 UINT i; 4246 #endif 4247 FRESULT res; 4248 DIR dj; 4249 FATFS *fs; 4250 DEF_NAMBUF 4251 4252 4253 /* Get logical drive */ 4254 res = mount_volume(&path, &fs, 0); 4255 if (res == FR_OK) { 4256 dj.obj.fs = fs; 4257 INIT_NAMBUF(fs); 4258 res = follow_path(&dj, path); /* Follow the path */ 4259 if (res == FR_OK) { /* Follow completed */ 4260 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it the start directory itself? */ 4261 fs->cdir = dj.obj.sclust; 4262 #if FF_FS_EXFAT 4263 if (fs->fs_type == FS_EXFAT) { 4264 fs->cdc_scl = dj.obj.c_scl; 4265 fs->cdc_size = dj.obj.c_size; 4266 fs->cdc_ofs = dj.obj.c_ofs; 4267 } 4268 #endif 4269 } else { 4270 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */ 4271 #if FF_FS_EXFAT 4272 if (fs->fs_type == FS_EXFAT) { 4273 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */ 4274 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */ 4275 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 4276 fs->cdc_ofs = dj.blk_ofs; 4277 } else 4278 #endif 4279 { 4280 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */ 4281 } 4282 } else { 4283 res = FR_NO_PATH; /* Reached but a file */ 4284 } 4285 } 4286 } 4287 FREE_NAMBUF(); 4288 if (res == FR_NO_FILE) res = FR_NO_PATH; 4289 #if FF_STR_VOLUME_ID == 2 /* Also current drive is changed at Unix style volume ID */ 4290 if (res == FR_OK) { 4291 for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ; /* Set current drive */ 4292 CurrVol = (BYTE)i; 4293 } 4294 #endif 4295 } 4296 4297 LEAVE_FF(fs, res); 4298 } 4299 4300 4301 #if FF_FS_RPATH >= 2 4302 FRESULT f_getcwd ( 4303 TCHAR* buff, /* Pointer to the directory path */ 4304 UINT len /* Size of buff in unit of TCHAR */ 4305 ) 4306 { 4307 FRESULT res; 4308 DIR dj; 4309 FATFS *fs; 4310 UINT i, n; 4311 DWORD ccl; 4312 TCHAR *tp = buff; 4313 #if FF_VOLUMES >= 2 4314 UINT vl; 4315 #if FF_STR_VOLUME_ID 4316 const char *vp; 4317 #endif 4318 #endif 4319 FILINFO fno; 4320 DEF_NAMBUF 4321 4322 4323 /* Get logical drive */ 4324 buff[0] = 0; /* Set null string to get current volume */ 4325 res = mount_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */ 4326 if (res == FR_OK) { 4327 dj.obj.fs = fs; 4328 INIT_NAMBUF(fs); 4329 4330 /* Follow parent directories and create the path */ 4331 i = len; /* Bottom of buffer (directory stack base) */ 4332 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */ 4333 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */ 4334 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 4335 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */ 4336 if (res != FR_OK) break; 4337 res = move_window(fs, dj.sect); 4338 if (res != FR_OK) break; 4339 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */ 4340 res = dir_sdi(&dj, 0); 4341 if (res != FR_OK) break; 4342 do { /* Find the entry links to the child directory */ 4343 res = DIR_READ_FILE(&dj); 4344 if (res != FR_OK) break; 4345 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */ 4346 res = dir_next(&dj, 0); 4347 } while (res == FR_OK); 4348 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 4349 if (res != FR_OK) break; 4350 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 4351 for (n = 0; fno.fname[n]; n++) ; /* Name length */ 4352 if (i < n + 1) { /* Insufficient space to store the path name? */ 4353 res = FR_NOT_ENOUGH_CORE; break; 4354 } 4355 while (n) buff[--i] = fno.fname[--n]; /* Stack the name */ 4356 buff[--i] = '/'; 4357 } 4358 } 4359 if (res == FR_OK) { 4360 if (i == len) buff[--i] = '/'; /* Is it the root-directory? */ 4361 #if FF_VOLUMES >= 2 /* Put drive prefix */ 4362 vl = 0; 4363 #if FF_STR_VOLUME_ID >= 1 /* String volume ID */ 4364 for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ; 4365 if (i >= n + 2) { 4366 if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/'; 4367 for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ; 4368 if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':'; 4369 vl++; 4370 } 4371 #else /* Numeric volume ID */ 4372 if (i >= 3) { 4373 *tp++ = (TCHAR)'0' + CurrVol; 4374 *tp++ = (TCHAR)':'; 4375 vl = 2; 4376 } 4377 #endif 4378 if (vl == 0) res = FR_NOT_ENOUGH_CORE; 4379 #endif 4380 /* Add current directory path */ 4381 if (res == FR_OK) { 4382 do *tp++ = buff[i++]; while (i < len); /* Copy stacked path string */ 4383 } 4384 } 4385 FREE_NAMBUF(); 4386 } 4387 4388 *tp = 0; 4389 LEAVE_FF(fs, res); 4390 } 4391 4392 #endif /* FF_FS_RPATH >= 2 */ 4393 #endif /* FF_FS_RPATH >= 1 */ 4394 4395 4396 4397 #if FF_FS_MINIMIZE <= 2 4398 /*-----------------------------------------------------------------------*/ 4399 /* Seek File Read/Write Pointer */ 4400 /*-----------------------------------------------------------------------*/ 4401 4402 FRESULT f_lseek ( 4403 FIL* fp, /* Pointer to the file object */ 4404 FSIZE_t ofs /* File pointer from top of file */ 4405 ) 4406 { 4407 FRESULT res; 4408 FATFS *fs; 4409 DWORD clst, bcs; 4410 LBA_t nsect; 4411 FSIZE_t ifptr; 4412 #if FF_USE_FASTSEEK 4413 DWORD cl, pcl, ncl, tcl, tlen, ulen, *tbl; 4414 LBA_t dsc; 4415 #endif 4416 4417 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 4418 if (res == FR_OK) res = (FRESULT)fp->err; 4419 #if FF_FS_EXFAT && !FF_FS_READONLY 4420 if (res == FR_OK && fs->fs_type == FS_EXFAT) { 4421 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 4422 } 4423 #endif 4424 if (res != FR_OK) LEAVE_FF(fs, res); 4425 4426 #if FF_USE_FASTSEEK 4427 if (fp->cltbl) { /* Fast seek */ 4428 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 4429 tbl = fp->cltbl; 4430 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 4431 cl = fp->obj.sclust; /* Origin of the chain */ 4432 if (cl != 0) { 4433 do { 4434 /* Get a fragment */ 4435 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 4436 do { 4437 pcl = cl; ncl++; 4438 cl = get_fat(&fp->obj, cl); 4439 if (cl <= 1) ABORT(fs, FR_INT_ERR); 4440 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4441 } while (cl == pcl + 1); 4442 if (ulen <= tlen) { /* Store the length and top of the fragment */ 4443 *tbl++ = ncl; *tbl++ = tcl; 4444 } 4445 } while (cl < fs->n_fatent); /* Repeat until end of chain */ 4446 } 4447 *fp->cltbl = ulen; /* Number of items used */ 4448 if (ulen <= tlen) { 4449 *tbl = 0; /* Terminate table */ 4450 } else { 4451 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 4452 } 4453 } else { /* Fast seek */ 4454 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */ 4455 fp->fptr = ofs; /* Set file pointer */ 4456 if (ofs > 0) { 4457 fp->clust = clmt_clust(fp, ofs - 1); 4458 dsc = clst2sect(fs, fp->clust); 4459 if (dsc == 0) ABORT(fs, FR_INT_ERR); 4460 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1); 4461 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */ 4462 #if !FF_FS_TINY 4463 #if !FF_FS_READONLY 4464 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 4465 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 4466 fp->flag &= (BYTE)~FA_DIRTY; 4467 } 4468 #endif 4469 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */ 4470 #endif 4471 fp->sect = dsc; 4472 } 4473 } 4474 } 4475 } else 4476 #endif 4477 4478 /* Normal Seek */ 4479 { 4480 #if FF_FS_EXFAT 4481 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */ 4482 #endif 4483 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */ 4484 ofs = fp->obj.objsize; 4485 } 4486 ifptr = fp->fptr; 4487 fp->fptr = nsect = 0; 4488 if (ofs > 0) { 4489 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */ 4490 if (ifptr > 0 && 4491 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 4492 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */ 4493 ofs -= fp->fptr; 4494 clst = fp->clust; 4495 } else { /* When seek to back cluster, */ 4496 clst = fp->obj.sclust; /* start from the first cluster */ 4497 #if !FF_FS_READONLY 4498 if (clst == 0) { /* If no cluster chain, create a new chain */ 4499 clst = create_chain(&fp->obj, 0); 4500 if (clst == 1) ABORT(fs, FR_INT_ERR); 4501 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4502 fp->obj.sclust = clst; 4503 } 4504 #endif 4505 fp->clust = clst; 4506 } 4507 if (clst != 0) { 4508 while (ofs > bcs) { /* Cluster following loop */ 4509 ofs -= bcs; fp->fptr += bcs; 4510 #if !FF_FS_READONLY 4511 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 4512 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */ 4513 fp->obj.objsize = fp->fptr; 4514 fp->flag |= FA_MODIFIED; 4515 } 4516 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */ 4517 if (clst == 0) { /* Clip file size in case of disk full */ 4518 ofs = 0; break; 4519 } 4520 } else 4521 #endif 4522 { 4523 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */ 4524 } 4525 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 4526 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR); 4527 fp->clust = clst; 4528 } 4529 fp->fptr += ofs; 4530 if (ofs % SS(fs)) { 4531 nsect = clst2sect(fs, clst); /* Current sector */ 4532 if (nsect == 0) ABORT(fs, FR_INT_ERR); 4533 nsect += (DWORD)(ofs / SS(fs)); 4534 } 4535 } 4536 } 4537 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */ 4538 fp->obj.objsize = fp->fptr; 4539 fp->flag |= FA_MODIFIED; 4540 } 4541 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */ 4542 #if !FF_FS_TINY 4543 #if !FF_FS_READONLY 4544 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 4545 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 4546 fp->flag &= (BYTE)~FA_DIRTY; 4547 } 4548 #endif 4549 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 4550 #endif 4551 fp->sect = nsect; 4552 } 4553 } 4554 4555 LEAVE_FF(fs, res); 4556 } 4557 4558 4559 4560 #if FF_FS_MINIMIZE <= 1 4561 /*-----------------------------------------------------------------------*/ 4562 /* Create a Directory Object */ 4563 /*-----------------------------------------------------------------------*/ 4564 4565 FRESULT f_opendir ( 4566 DIR* dp, /* Pointer to directory object to create */ 4567 const TCHAR* path /* Pointer to the directory path */ 4568 ) 4569 { 4570 FRESULT res; 4571 FATFS *fs; 4572 DEF_NAMBUF 4573 4574 4575 if (!dp) return FR_INVALID_OBJECT; 4576 4577 /* Get logical drive */ 4578 res = mount_volume(&path, &fs, 0); 4579 if (res == FR_OK) { 4580 dp->obj.fs = fs; 4581 INIT_NAMBUF(fs); 4582 res = follow_path(dp, path); /* Follow the path to the directory */ 4583 if (res == FR_OK) { /* Follow completed */ 4584 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */ 4585 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */ 4586 #if FF_FS_EXFAT 4587 if (fs->fs_type == FS_EXFAT) { 4588 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */ 4589 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 4590 dp->obj.c_ofs = dp->blk_ofs; 4591 init_alloc_info(fs, &dp->obj); /* Get object allocation info */ 4592 } else 4593 #endif 4594 { 4595 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */ 4596 } 4597 } else { /* This object is a file */ 4598 res = FR_NO_PATH; 4599 } 4600 } 4601 if (res == FR_OK) { 4602 dp->obj.id = fs->id; 4603 res = dir_sdi(dp, 0); /* Rewind directory */ 4604 #if FF_FS_LOCK != 0 4605 if (res == FR_OK) { 4606 if (dp->obj.sclust != 0) { 4607 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */ 4608 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES; 4609 } else { 4610 dp->obj.lockid = 0; /* Root directory need not to be locked */ 4611 } 4612 } 4613 #endif 4614 } 4615 } 4616 FREE_NAMBUF(); 4617 if (res == FR_NO_FILE) res = FR_NO_PATH; 4618 } 4619 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */ 4620 4621 LEAVE_FF(fs, res); 4622 } 4623 4624 4625 4626 4627 /*-----------------------------------------------------------------------*/ 4628 /* Close Directory */ 4629 /*-----------------------------------------------------------------------*/ 4630 4631 FRESULT f_closedir ( 4632 DIR *dp /* Pointer to the directory object to be closed */ 4633 ) 4634 { 4635 FRESULT res; 4636 FATFS *fs; 4637 4638 4639 res = validate(&dp->obj, &fs); /* Check validity of the file object */ 4640 if (res == FR_OK) { 4641 #if FF_FS_LOCK != 0 4642 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */ 4643 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */ 4644 #else 4645 dp->obj.fs = 0; /* Invalidate directory object */ 4646 #endif 4647 #if FF_FS_REENTRANT 4648 unlock_fs(fs, FR_OK); /* Unlock volume */ 4649 #endif 4650 } 4651 return res; 4652 } 4653 4654 4655 4656 4657 /*-----------------------------------------------------------------------*/ 4658 /* Read Directory Entries in Sequence */ 4659 /*-----------------------------------------------------------------------*/ 4660 4661 FRESULT f_readdir ( 4662 DIR* dp, /* Pointer to the open directory object */ 4663 FILINFO* fno /* Pointer to file information to return */ 4664 ) 4665 { 4666 FRESULT res; 4667 FATFS *fs; 4668 DEF_NAMBUF 4669 4670 4671 res = validate(&dp->obj, &fs); /* Check validity of the directory object */ 4672 if (res == FR_OK) { 4673 if (!fno) { 4674 res = dir_sdi(dp, 0); /* Rewind the directory object */ 4675 } else { 4676 INIT_NAMBUF(fs); 4677 res = DIR_READ_FILE(dp); /* Read an item */ 4678 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */ 4679 if (res == FR_OK) { /* A valid entry is found */ 4680 get_fileinfo(dp, fno); /* Get the object information */ 4681 res = dir_next(dp, 0); /* Increment index for next */ 4682 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */ 4683 } 4684 FREE_NAMBUF(); 4685 } 4686 } 4687 LEAVE_FF(fs, res); 4688 } 4689 4690 4691 4692 #if FF_USE_FIND 4693 /*-----------------------------------------------------------------------*/ 4694 /* Find Next File */ 4695 /*-----------------------------------------------------------------------*/ 4696 4697 FRESULT f_findnext ( 4698 DIR* dp, /* Pointer to the open directory object */ 4699 FILINFO* fno /* Pointer to the file information structure */ 4700 ) 4701 { 4702 FRESULT res; 4703 4704 4705 for (;;) { 4706 res = f_readdir(dp, fno); /* Get a directory item */ 4707 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 4708 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */ 4709 #if FF_USE_LFN && FF_USE_FIND == 2 4710 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */ 4711 #endif 4712 } 4713 return res; 4714 } 4715 4716 4717 4718 /*-----------------------------------------------------------------------*/ 4719 /* Find First File */ 4720 /*-----------------------------------------------------------------------*/ 4721 4722 FRESULT f_findfirst ( 4723 DIR* dp, /* Pointer to the blank directory object */ 4724 FILINFO* fno, /* Pointer to the file information structure */ 4725 const TCHAR* path, /* Pointer to the directory to open */ 4726 const TCHAR* pattern /* Pointer to the matching pattern */ 4727 ) 4728 { 4729 FRESULT res; 4730 4731 4732 dp->pat = pattern; /* Save pointer to pattern string */ 4733 res = f_opendir(dp, path); /* Open the target directory */ 4734 if (res == FR_OK) { 4735 res = f_findnext(dp, fno); /* Find the first item */ 4736 } 4737 return res; 4738 } 4739 4740 #endif /* FF_USE_FIND */ 4741 4742 4743 4744 #if FF_FS_MINIMIZE == 0 4745 /*-----------------------------------------------------------------------*/ 4746 /* Get File Status */ 4747 /*-----------------------------------------------------------------------*/ 4748 4749 FRESULT f_stat ( 4750 const TCHAR* path, /* Pointer to the file path */ 4751 FILINFO* fno /* Pointer to file information to return */ 4752 ) 4753 { 4754 FRESULT res; 4755 DIR dj; 4756 DEF_NAMBUF 4757 4758 4759 /* Get logical drive */ 4760 res = mount_volume(&path, &dj.obj.fs, 0); 4761 if (res == FR_OK) { 4762 INIT_NAMBUF(dj.obj.fs); 4763 res = follow_path(&dj, path); /* Follow the file path */ 4764 if (res == FR_OK) { /* Follow completed */ 4765 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */ 4766 res = FR_INVALID_NAME; 4767 } else { /* Found an object */ 4768 if (fno) get_fileinfo(&dj, fno); 4769 } 4770 } 4771 FREE_NAMBUF(); 4772 } 4773 4774 LEAVE_FF(dj.obj.fs, res); 4775 } 4776 4777 4778 4779 #if !FF_FS_READONLY 4780 /*-----------------------------------------------------------------------*/ 4781 /* Get Number of Free Clusters */ 4782 /*-----------------------------------------------------------------------*/ 4783 4784 FRESULT f_getfree ( 4785 const TCHAR* path, /* Logical drive number */ 4786 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 4787 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */ 4788 ) 4789 { 4790 FRESULT res; 4791 FATFS *fs; 4792 DWORD nfree, clst, stat; 4793 LBA_t sect; 4794 UINT i; 4795 FFOBJID obj; 4796 4797 4798 /* Get logical drive */ 4799 res = mount_volume(&path, &fs, 0); 4800 if (res == FR_OK) { 4801 *fatfs = fs; /* Return ptr to the fs object */ 4802 /* If free_clst is valid, return it without full FAT scan */ 4803 if (fs->free_clst <= fs->n_fatent - 2) { 4804 *nclst = fs->free_clst; 4805 } else { 4806 /* Scan FAT to obtain number of free clusters */ 4807 nfree = 0; 4808 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */ 4809 clst = 2; obj.fs = fs; 4810 do { 4811 stat = get_fat(&obj, clst); 4812 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 4813 if (stat == 1) { res = FR_INT_ERR; break; } 4814 if (stat == 0) nfree++; 4815 } while (++clst < fs->n_fatent); 4816 } else { 4817 #if FF_FS_EXFAT 4818 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */ 4819 BYTE bm; 4820 UINT b; 4821 4822 clst = fs->n_fatent - 2; /* Number of clusters */ 4823 sect = fs->bitbase; /* Bitmap sector */ 4824 i = 0; /* Offset in the sector */ 4825 do { /* Counts numbuer of bits with zero in the bitmap */ 4826 if (i == 0) { 4827 res = move_window(fs, sect++); 4828 if (res != FR_OK) break; 4829 } 4830 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) { 4831 if (!(bm & 1)) nfree++; 4832 bm >>= 1; 4833 } 4834 i = (i + 1) % SS(fs); 4835 } while (clst); 4836 } else 4837 #endif 4838 { /* FAT16/32: Scan WORD/DWORD FAT entries */ 4839 clst = fs->n_fatent; /* Number of entries */ 4840 sect = fs->fatbase; /* Top of the FAT */ 4841 i = 0; /* Offset in the sector */ 4842 do { /* Counts numbuer of entries with zero in the FAT */ 4843 if (i == 0) { 4844 res = move_window(fs, sect++); 4845 if (res != FR_OK) break; 4846 } 4847 if (fs->fs_type == FS_FAT16) { 4848 if (ld_word(fs->win + i) == 0) nfree++; 4849 i += 2; 4850 } else { 4851 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++; 4852 i += 4; 4853 } 4854 i %= SS(fs); 4855 } while (--clst); 4856 } 4857 } 4858 *nclst = nfree; /* Return the free clusters */ 4859 fs->free_clst = nfree; /* Now free_clst is valid */ 4860 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */ 4861 } 4862 } 4863 4864 LEAVE_FF(fs, res); 4865 } 4866 4867 4868 4869 4870 /*-----------------------------------------------------------------------*/ 4871 /* Truncate File */ 4872 /*-----------------------------------------------------------------------*/ 4873 4874 FRESULT f_truncate ( 4875 FIL* fp /* Pointer to the file object */ 4876 ) 4877 { 4878 FRESULT res; 4879 FATFS *fs; 4880 DWORD ncl; 4881 4882 4883 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 4884 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 4885 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 4886 4887 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */ 4888 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 4889 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 4890 fp->obj.sclust = 0; 4891 } else { /* When truncate a part of the file, remove remaining clusters */ 4892 ncl = get_fat(&fp->obj, fp->clust); 4893 res = FR_OK; 4894 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 4895 if (ncl == 1) res = FR_INT_ERR; 4896 if (res == FR_OK && ncl < fs->n_fatent) { 4897 res = remove_chain(&fp->obj, ncl, fp->clust); 4898 } 4899 } 4900 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */ 4901 fp->flag |= FA_MODIFIED; 4902 #if !FF_FS_TINY 4903 if (res == FR_OK && (fp->flag & FA_DIRTY)) { 4904 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) { 4905 res = FR_DISK_ERR; 4906 } else { 4907 fp->flag &= (BYTE)~FA_DIRTY; 4908 } 4909 } 4910 #endif 4911 if (res != FR_OK) ABORT(fs, res); 4912 } 4913 4914 LEAVE_FF(fs, res); 4915 } 4916 4917 4918 4919 4920 /*-----------------------------------------------------------------------*/ 4921 /* Delete a File/Directory */ 4922 /*-----------------------------------------------------------------------*/ 4923 4924 FRESULT f_unlink ( 4925 const TCHAR* path /* Pointer to the file or directory path */ 4926 ) 4927 { 4928 FRESULT res; 4929 DIR dj, sdj; 4930 DWORD dclst = 0; 4931 FATFS *fs; 4932 #if FF_FS_EXFAT 4933 FFOBJID obj; 4934 #endif 4935 DEF_NAMBUF 4936 4937 4938 /* Get logical drive */ 4939 res = mount_volume(&path, &fs, FA_WRITE); 4940 if (res == FR_OK) { 4941 dj.obj.fs = fs; 4942 INIT_NAMBUF(fs); 4943 res = follow_path(&dj, path); /* Follow the file path */ 4944 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) { 4945 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 4946 } 4947 #if FF_FS_LOCK != 0 4948 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */ 4949 #endif 4950 if (res == FR_OK) { /* The object is accessible */ 4951 if (dj.fn[NSFLAG] & NS_NONAME) { 4952 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 4953 } else { 4954 if (dj.obj.attr & AM_RDO) { 4955 res = FR_DENIED; /* Cannot remove R/O object */ 4956 } 4957 } 4958 if (res == FR_OK) { 4959 #if FF_FS_EXFAT 4960 obj.fs = fs; 4961 if (fs->fs_type == FS_EXFAT) { 4962 init_alloc_info(fs, &obj); 4963 dclst = obj.sclust; 4964 } else 4965 #endif 4966 { 4967 dclst = ld_clust(fs, dj.dir); 4968 } 4969 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */ 4970 #if FF_FS_RPATH != 0 4971 if (dclst == fs->cdir) { /* Is it the current directory? */ 4972 res = FR_DENIED; 4973 } else 4974 #endif 4975 { 4976 sdj.obj.fs = fs; /* Open the sub-directory */ 4977 sdj.obj.sclust = dclst; 4978 #if FF_FS_EXFAT 4979 if (fs->fs_type == FS_EXFAT) { 4980 sdj.obj.objsize = obj.objsize; 4981 sdj.obj.stat = obj.stat; 4982 } 4983 #endif 4984 res = dir_sdi(&sdj, 0); 4985 if (res == FR_OK) { 4986 res = DIR_READ_FILE(&sdj); /* Test if the directory is empty */ 4987 if (res == FR_OK) res = FR_DENIED; /* Not empty? */ 4988 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */ 4989 } 4990 } 4991 } 4992 } 4993 if (res == FR_OK) { 4994 res = dir_remove(&dj); /* Remove the directory entry */ 4995 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */ 4996 #if FF_FS_EXFAT 4997 res = remove_chain(&obj, dclst, 0); 4998 #else 4999 res = remove_chain(&dj.obj, dclst, 0); 5000 #endif 5001 } 5002 if (res == FR_OK) res = sync_fs(fs); 5003 } 5004 } 5005 FREE_NAMBUF(); 5006 } 5007 5008 LEAVE_FF(fs, res); 5009 } 5010 5011 5012 5013 5014 /*-----------------------------------------------------------------------*/ 5015 /* Create a Directory */ 5016 /*-----------------------------------------------------------------------*/ 5017 5018 FRESULT f_mkdir ( 5019 const TCHAR* path /* Pointer to the directory path */ 5020 ) 5021 { 5022 FRESULT res; 5023 DIR dj; 5024 FFOBJID sobj; 5025 FATFS *fs; 5026 DWORD dcl, pcl, tm; 5027 DEF_NAMBUF 5028 5029 5030 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 5031 if (res == FR_OK) { 5032 dj.obj.fs = fs; 5033 INIT_NAMBUF(fs); 5034 res = follow_path(&dj, path); /* Follow the file path */ 5035 if (res == FR_OK) res = FR_EXIST; /* Name collision? */ 5036 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { /* Invalid name? */ 5037 res = FR_INVALID_NAME; 5038 } 5039 if (res == FR_NO_FILE) { /* It is clear to create a new directory */ 5040 sobj.fs = fs; /* New object id to create a new chain */ 5041 dcl = create_chain(&sobj, 0); /* Allocate a cluster for the new directory */ 5042 res = FR_OK; 5043 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster? */ 5044 if (dcl == 1) res = FR_INT_ERR; /* Any insanity? */ 5045 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; /* Disk error? */ 5046 tm = GET_FATTIME(); 5047 if (res == FR_OK) { 5048 res = dir_clear(fs, dcl); /* Clean up the new table */ 5049 if (res == FR_OK) { 5050 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* Create dot entries (FAT only) */ 5051 mem_set(fs->win + DIR_Name, ' ', 11); /* Create "." entry */ 5052 fs->win[DIR_Name] = '.'; 5053 fs->win[DIR_Attr] = AM_DIR; 5054 st_dword(fs->win + DIR_ModTime, tm); 5055 st_clust(fs, fs->win, dcl); 5056 mem_cpy(fs->win + SZDIRE, fs->win, SZDIRE); /* Create ".." entry */ 5057 fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust; 5058 st_clust(fs, fs->win + SZDIRE, pcl); 5059 fs->wflag = 1; 5060 } 5061 res = dir_register(&dj); /* Register the object to the parent directoy */ 5062 } 5063 } 5064 if (res == FR_OK) { 5065 #if FF_FS_EXFAT 5066 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */ 5067 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */ 5068 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */ 5069 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs)); /* Directory size needs to be valid */ 5070 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs)); 5071 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */ 5072 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */ 5073 res = store_xdir(&dj); 5074 } else 5075 #endif 5076 { 5077 st_dword(dj.dir + DIR_ModTime, tm); /* Created time */ 5078 st_clust(fs, dj.dir, dcl); /* Table start cluster */ 5079 dj.dir[DIR_Attr] = AM_DIR; /* Attribute */ 5080 fs->wflag = 1; 5081 } 5082 if (res == FR_OK) { 5083 res = sync_fs(fs); 5084 } 5085 } else { 5086 remove_chain(&sobj, dcl, 0); /* Could not register, remove the allocated cluster */ 5087 } 5088 } 5089 FREE_NAMBUF(); 5090 } 5091 5092 LEAVE_FF(fs, res); 5093 } 5094 5095 5096 5097 5098 /*-----------------------------------------------------------------------*/ 5099 /* Rename a File/Directory */ 5100 /*-----------------------------------------------------------------------*/ 5101 5102 FRESULT f_rename ( 5103 const TCHAR* path_old, /* Pointer to the object name to be renamed */ 5104 const TCHAR* path_new /* Pointer to the new name */ 5105 ) 5106 { 5107 FRESULT res; 5108 DIR djo, djn; 5109 FATFS *fs; 5110 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir; 5111 LBA_t sect; 5112 DEF_NAMBUF 5113 5114 5115 get_ldnumber(&path_new); /* Snip the drive number of new name off */ 5116 res = mount_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */ 5117 if (res == FR_OK) { 5118 djo.obj.fs = fs; 5119 INIT_NAMBUF(fs); 5120 res = follow_path(&djo, path_old); /* Check old object */ 5121 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */ 5122 #if FF_FS_LOCK != 0 5123 if (res == FR_OK) { 5124 res = chk_lock(&djo, 2); 5125 } 5126 #endif 5127 if (res == FR_OK) { /* Object to be renamed is found */ 5128 #if FF_FS_EXFAT 5129 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */ 5130 BYTE nf, nn; 5131 WORD nh; 5132 5133 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */ 5134 mem_cpy(&djn, &djo, sizeof djo); 5135 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 5136 if (res == FR_OK) { /* Is new name already in use by any other object? */ 5137 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 5138 } 5139 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 5140 res = dir_register(&djn); /* Register the new entry */ 5141 if (res == FR_OK) { 5142 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName]; 5143 nh = ld_word(fs->dirbuf + XDIR_NameHash); 5144 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */ 5145 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn; 5146 st_word(fs->dirbuf + XDIR_NameHash, nh); 5147 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 5148 /* Start of critical section where an interruption can cause a cross-link */ 5149 res = store_xdir(&djn); 5150 } 5151 } 5152 } else 5153 #endif 5154 { /* At FAT/FAT32 volume */ 5155 mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */ 5156 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */ 5157 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 5158 if (res == FR_OK) { /* Is new name already in use by any other object? */ 5159 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 5160 } 5161 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 5162 res = dir_register(&djn); /* Register the new entry */ 5163 if (res == FR_OK) { 5164 dir = djn.dir; /* Copy directory entry of the object except name */ 5165 mem_cpy(dir + 13, buf + 13, SZDIRE - 13); 5166 dir[DIR_Attr] = buf[DIR_Attr]; 5167 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 5168 fs->wflag = 1; 5169 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */ 5170 sect = clst2sect(fs, ld_clust(fs, dir)); 5171 if (sect == 0) { 5172 res = FR_INT_ERR; 5173 } else { 5174 /* Start of critical section where an interruption can cause a cross-link */ 5175 res = move_window(fs, sect); 5176 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */ 5177 if (res == FR_OK && dir[1] == '.') { 5178 st_clust(fs, dir, djn.obj.sclust); 5179 fs->wflag = 1; 5180 } 5181 } 5182 } 5183 } 5184 } 5185 } 5186 if (res == FR_OK) { 5187 res = dir_remove(&djo); /* Remove old entry */ 5188 if (res == FR_OK) { 5189 res = sync_fs(fs); 5190 } 5191 } 5192 /* End of the critical section */ 5193 } 5194 FREE_NAMBUF(); 5195 } 5196 5197 LEAVE_FF(fs, res); 5198 } 5199 5200 #endif /* !FF_FS_READONLY */ 5201 #endif /* FF_FS_MINIMIZE == 0 */ 5202 #endif /* FF_FS_MINIMIZE <= 1 */ 5203 #endif /* FF_FS_MINIMIZE <= 2 */ 5204 5205 5206 5207 #if FF_USE_CHMOD && !FF_FS_READONLY 5208 /*-----------------------------------------------------------------------*/ 5209 /* Change Attribute */ 5210 /*-----------------------------------------------------------------------*/ 5211 5212 FRESULT f_chmod ( 5213 const TCHAR* path, /* Pointer to the file path */ 5214 BYTE attr, /* Attribute bits */ 5215 BYTE mask /* Attribute mask to change */ 5216 ) 5217 { 5218 FRESULT res; 5219 DIR dj; 5220 FATFS *fs; 5221 DEF_NAMBUF 5222 5223 5224 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 5225 if (res == FR_OK) { 5226 dj.obj.fs = fs; 5227 INIT_NAMBUF(fs); 5228 res = follow_path(&dj, path); /* Follow the file path */ 5229 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 5230 if (res == FR_OK) { 5231 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 5232 #if FF_FS_EXFAT 5233 if (fs->fs_type == FS_EXFAT) { 5234 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 5235 res = store_xdir(&dj); 5236 } else 5237 #endif 5238 { 5239 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 5240 fs->wflag = 1; 5241 } 5242 if (res == FR_OK) { 5243 res = sync_fs(fs); 5244 } 5245 } 5246 FREE_NAMBUF(); 5247 } 5248 5249 LEAVE_FF(fs, res); 5250 } 5251 5252 5253 5254 5255 /*-----------------------------------------------------------------------*/ 5256 /* Change Timestamp */ 5257 /*-----------------------------------------------------------------------*/ 5258 5259 FRESULT f_utime ( 5260 const TCHAR* path, /* Pointer to the file/directory name */ 5261 const FILINFO* fno /* Pointer to the timestamp to be set */ 5262 ) 5263 { 5264 FRESULT res; 5265 DIR dj; 5266 FATFS *fs; 5267 DEF_NAMBUF 5268 5269 5270 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 5271 if (res == FR_OK) { 5272 dj.obj.fs = fs; 5273 INIT_NAMBUF(fs); 5274 res = follow_path(&dj, path); /* Follow the file path */ 5275 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 5276 if (res == FR_OK) { 5277 #if FF_FS_EXFAT 5278 if (fs->fs_type == FS_EXFAT) { 5279 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 5280 res = store_xdir(&dj); 5281 } else 5282 #endif 5283 { 5284 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 5285 fs->wflag = 1; 5286 } 5287 if (res == FR_OK) { 5288 res = sync_fs(fs); 5289 } 5290 } 5291 FREE_NAMBUF(); 5292 } 5293 5294 LEAVE_FF(fs, res); 5295 } 5296 5297 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */ 5298 5299 5300 5301 #if FF_USE_LABEL 5302 /*-----------------------------------------------------------------------*/ 5303 /* Get Volume Label */ 5304 /*-----------------------------------------------------------------------*/ 5305 5306 FRESULT f_getlabel ( 5307 const TCHAR* path, /* Logical drive number */ 5308 TCHAR* label, /* Buffer to store the volume label */ 5309 DWORD* vsn /* Variable to store the volume serial number */ 5310 ) 5311 { 5312 FRESULT res; 5313 DIR dj; 5314 FATFS *fs; 5315 UINT si, di; 5316 WCHAR wc; 5317 5318 /* Get logical drive */ 5319 res = mount_volume(&path, &fs, 0); 5320 5321 /* Get volume label */ 5322 if (res == FR_OK && label) { 5323 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 5324 res = dir_sdi(&dj, 0); 5325 if (res == FR_OK) { 5326 res = DIR_READ_LABEL(&dj); /* Find a volume label entry */ 5327 if (res == FR_OK) { 5328 #if FF_FS_EXFAT 5329 if (fs->fs_type == FS_EXFAT) { 5330 WCHAR hs; 5331 5332 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */ 5333 wc = ld_word(dj.dir + XDIR_Label + si * 2); 5334 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */ 5335 hs = wc; continue; 5336 } 5337 wc = put_utf((DWORD)hs << 16 | wc, &label[di], 4); 5338 if (wc == 0) { di = 0; break; } 5339 di += wc; 5340 hs = 0; 5341 } 5342 if (hs != 0) di = 0; /* Broken surrogate pair? */ 5343 label[di] = 0; 5344 } else 5345 #endif 5346 { 5347 si = di = 0; /* Extract volume label from AM_VOL entry */ 5348 while (si < 11) { 5349 wc = dj.dir[si++]; 5350 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */ 5351 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */ 5352 wc = ff_oem2uni(wc, CODEPAGE); /* Convert it into Unicode */ 5353 if (wc != 0) wc = put_utf(wc, &label[di], 4); /* Put it in Unicode */ 5354 if (wc == 0) { di = 0; break; } 5355 di += wc; 5356 #else /* ANSI/OEM output */ 5357 label[di++] = (TCHAR)wc; 5358 #endif 5359 } 5360 do { /* Truncate trailing spaces */ 5361 label[di] = 0; 5362 if (di == 0) break; 5363 } while (label[--di] == ' '); 5364 } 5365 } 5366 } 5367 if (res == FR_NO_FILE) { /* No label entry and return nul string */ 5368 label[0] = 0; 5369 res = FR_OK; 5370 } 5371 } 5372 5373 /* Get volume serial number */ 5374 if (res == FR_OK && vsn) { 5375 res = move_window(fs, fs->volbase); 5376 if (res == FR_OK) { 5377 switch (fs->fs_type) { 5378 case FS_EXFAT: 5379 di = BPB_VolIDEx; break; 5380 5381 case FS_FAT32: 5382 di = BS_VolID32; break; 5383 5384 default: 5385 di = BS_VolID; 5386 } 5387 *vsn = ld_dword(fs->win + di); 5388 } 5389 } 5390 5391 LEAVE_FF(fs, res); 5392 } 5393 5394 5395 5396 #if !FF_FS_READONLY 5397 /*-----------------------------------------------------------------------*/ 5398 /* Set Volume Label */ 5399 /*-----------------------------------------------------------------------*/ 5400 5401 FRESULT f_setlabel ( 5402 const TCHAR* label /* Volume label to set with heading logical drive number */ 5403 ) 5404 { 5405 FRESULT res; 5406 DIR dj; 5407 FATFS *fs; 5408 BYTE dirvn[22]; 5409 UINT di; 5410 WCHAR wc; 5411 static const char badchr[] = "+.,;=[]/\\\"*:<>\?|\x7F"; /* [0..] for FAT, [7..] for exFAT */ 5412 #if FF_USE_LFN 5413 DWORD dc; 5414 #endif 5415 5416 /* Get logical drive */ 5417 res = mount_volume(&label, &fs, FA_WRITE); 5418 if (res != FR_OK) LEAVE_FF(fs, res); 5419 5420 #if FF_FS_EXFAT 5421 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 5422 mem_set(dirvn, 0, 22); 5423 di = 0; 5424 while ((UINT)*label >= ' ') { /* Create volume label */ 5425 dc = tchar2uni(&label); /* Get a Unicode character */ 5426 if (dc >= 0x10000) { 5427 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */ 5428 dc = 0; 5429 } else { 5430 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++; 5431 } 5432 } 5433 if (dc == 0 || chk_chr(badchr + 7, (int)dc) || di >= 11) { /* Check validity of the volume label */ 5434 LEAVE_FF(fs, FR_INVALID_NAME); 5435 } 5436 st_word(dirvn + di * 2, (WCHAR)dc); di++; 5437 } 5438 } else 5439 #endif 5440 { /* On the FAT/FAT32 volume */ 5441 mem_set(dirvn, ' ', 11); 5442 di = 0; 5443 while ((UINT)*label >= ' ') { /* Create volume label */ 5444 #if FF_USE_LFN 5445 dc = tchar2uni(&label); 5446 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0; 5447 #else /* ANSI/OEM input */ 5448 wc = (BYTE)*label++; 5449 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0; 5450 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */ 5451 #if FF_CODE_PAGE == 0 5452 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 5453 #elif FF_CODE_PAGE < 900 5454 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 5455 #endif 5456 #endif 5457 if (wc == 0 || chk_chr(badchr + 0, (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */ 5458 LEAVE_FF(fs, FR_INVALID_NAME); 5459 } 5460 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8); 5461 dirvn[di++] = (BYTE)wc; 5462 } 5463 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 5464 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */ 5465 } 5466 5467 /* Set volume label */ 5468 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 5469 res = dir_sdi(&dj, 0); 5470 if (res == FR_OK) { 5471 res = DIR_READ_LABEL(&dj); /* Get volume label entry */ 5472 if (res == FR_OK) { 5473 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 5474 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */ 5475 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 5476 } else { 5477 if (di != 0) { 5478 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */ 5479 } else { 5480 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */ 5481 } 5482 } 5483 fs->wflag = 1; 5484 res = sync_fs(fs); 5485 } else { /* No volume label entry or an error */ 5486 if (res == FR_NO_FILE) { 5487 res = FR_OK; 5488 if (di != 0) { /* Create a volume label entry */ 5489 res = dir_alloc(&dj, 1); /* Allocate an entry */ 5490 if (res == FR_OK) { 5491 mem_set(dj.dir, 0, SZDIRE); /* Clean the entry */ 5492 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 5493 dj.dir[XDIR_Type] = ET_VLABEL; /* Create volume label entry */ 5494 dj.dir[XDIR_NumLabel] = (BYTE)di; 5495 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 5496 } else { 5497 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */ 5498 mem_cpy(dj.dir, dirvn, 11); 5499 } 5500 fs->wflag = 1; 5501 res = sync_fs(fs); 5502 } 5503 } 5504 } 5505 } 5506 } 5507 5508 LEAVE_FF(fs, res); 5509 } 5510 5511 #endif /* !FF_FS_READONLY */ 5512 #endif /* FF_USE_LABEL */ 5513 5514 5515 5516 #if FF_USE_EXPAND && !FF_FS_READONLY 5517 /*-----------------------------------------------------------------------*/ 5518 /* Allocate a Contiguous Blocks to the File */ 5519 /*-----------------------------------------------------------------------*/ 5520 5521 FRESULT f_expand ( 5522 FIL* fp, /* Pointer to the file object */ 5523 FSIZE_t fsz, /* File size to be expanded to */ 5524 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */ 5525 ) 5526 { 5527 FRESULT res; 5528 FATFS *fs; 5529 DWORD n, clst, stcl, scl, ncl, tcl, lclst; 5530 5531 5532 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 5533 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 5534 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); 5535 #if FF_FS_EXFAT 5536 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */ 5537 #endif 5538 n = (DWORD)fs->csize * SS(fs); /* Cluster size */ 5539 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */ 5540 stcl = fs->last_clst; lclst = 0; 5541 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2; 5542 5543 #if FF_FS_EXFAT 5544 if (fs->fs_type == FS_EXFAT) { 5545 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */ 5546 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */ 5547 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR; 5548 if (res == FR_OK) { /* A contiguous free area is found */ 5549 if (opt) { /* Allocate it now */ 5550 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */ 5551 lclst = scl + tcl - 1; 5552 } else { /* Set it as suggested point for next allocation */ 5553 lclst = scl - 1; 5554 } 5555 } 5556 } else 5557 #endif 5558 { 5559 scl = clst = stcl; ncl = 0; 5560 for (;;) { /* Find a contiguous cluster block */ 5561 n = get_fat(&fp->obj, clst); 5562 if (++clst >= fs->n_fatent) clst = 2; 5563 if (n == 1) { res = FR_INT_ERR; break; } 5564 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 5565 if (n == 0) { /* Is it a free cluster? */ 5566 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */ 5567 } else { 5568 scl = clst; ncl = 0; /* Not a free cluster */ 5569 } 5570 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */ 5571 } 5572 if (res == FR_OK) { /* A contiguous free area is found */ 5573 if (opt) { /* Allocate it now */ 5574 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */ 5575 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1); 5576 if (res != FR_OK) break; 5577 lclst = clst; 5578 } 5579 } else { /* Set it as suggested point for next allocation */ 5580 lclst = scl - 1; 5581 } 5582 } 5583 } 5584 5585 if (res == FR_OK) { 5586 fs->last_clst = lclst; /* Set suggested start cluster to start next */ 5587 if (opt) { /* Is it allocated now? */ 5588 fp->obj.sclust = scl; /* Update object allocation information */ 5589 fp->obj.objsize = fsz; 5590 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */ 5591 fp->flag |= FA_MODIFIED; 5592 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */ 5593 fs->free_clst -= tcl; 5594 fs->fsi_flag |= 1; 5595 } 5596 } 5597 } 5598 5599 LEAVE_FF(fs, res); 5600 } 5601 5602 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */ 5603 5604 5605 5606 #if FF_USE_FORWARD 5607 /*-----------------------------------------------------------------------*/ 5608 /* Forward Data to the Stream Directly */ 5609 /*-----------------------------------------------------------------------*/ 5610 5611 FRESULT f_forward ( 5612 FIL* fp, /* Pointer to the file object */ 5613 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 5614 UINT btf, /* Number of bytes to forward */ 5615 UINT* bf /* Pointer to number of bytes forwarded */ 5616 ) 5617 { 5618 FRESULT res; 5619 FATFS *fs; 5620 DWORD clst; 5621 LBA_t sect; 5622 FSIZE_t remain; 5623 UINT rcnt, csect; 5624 BYTE *dbuf; 5625 5626 5627 *bf = 0; /* Clear transfer byte counter */ 5628 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 5629 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 5630 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 5631 5632 remain = fp->obj.objsize - fp->fptr; 5633 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 5634 5635 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */ 5636 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 5637 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 5638 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 5639 if (csect == 0) { /* On the cluster boundary? */ 5640 clst = (fp->fptr == 0) ? /* On the top of the file? */ 5641 fp->obj.sclust : get_fat(&fp->obj, fp->clust); 5642 if (clst <= 1) ABORT(fs, FR_INT_ERR); 5643 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 5644 fp->clust = clst; /* Update current cluster */ 5645 } 5646 } 5647 sect = clst2sect(fs, fp->clust); /* Get current data sector */ 5648 if (sect == 0) ABORT(fs, FR_INT_ERR); 5649 sect += csect; 5650 #if FF_FS_TINY 5651 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */ 5652 dbuf = fs->win; 5653 #else 5654 if (fp->sect != sect) { /* Fill sector cache with file data */ 5655 #if !FF_FS_READONLY 5656 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 5657 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 5658 fp->flag &= (BYTE)~FA_DIRTY; 5659 } 5660 #endif 5661 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 5662 } 5663 dbuf = fp->buf; 5664 #endif 5665 fp->sect = sect; 5666 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */ 5667 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */ 5668 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */ 5669 if (rcnt == 0) ABORT(fs, FR_INT_ERR); 5670 } 5671 5672 LEAVE_FF(fs, FR_OK); 5673 } 5674 #endif /* FF_USE_FORWARD */ 5675 5676 5677 5678 #if !FF_FS_READONLY && FF_USE_MKFS 5679 /*-----------------------------------------------------------------------*/ 5680 /* Create an FAT/exFAT volume */ 5681 /*-----------------------------------------------------------------------*/ 5682 5683 #define N_SEC_TRACK 63 /* Sectors per track for determination of drive CHS */ 5684 #define GPT_ALIGN 0x100000 /* Alignment of partitions in GPT [byte] (>=128KB) */ 5685 #define GPT_ITEMS 128 /* Number of GPT table size (>=128, sector aligned) */ 5686 5687 5688 /* Create partitions on the physical drive */ 5689 5690 static FRESULT create_partition ( 5691 BYTE drv, /* Physical drive number */ 5692 const LBA_t plst[], /* Partition list */ 5693 UINT sys, /* System ID (for only MBR, temp setting) and bit8:GPT */ 5694 BYTE* buf /* Working buffer for a sector */ 5695 ) 5696 { 5697 UINT i, cy; 5698 LBA_t sz_drv; 5699 DWORD sz_drv32, s_lba32, n_lba32; 5700 BYTE *pte, hd, n_hd, sc, n_sc; 5701 5702 /* Get drive size */ 5703 if (disk_ioctl(drv, GET_SECTOR_COUNT, &sz_drv) != RES_OK) return FR_DISK_ERR; 5704 5705 #if FF_LBA64 5706 if (sz_drv >= FF_MIN_GPT) { /* Create partitions in GPT */ 5707 WORD ss; 5708 UINT sz_pt, pi, si, ofs; 5709 DWORD bcc, rnd, align; 5710 QWORD s_lba64, n_lba64, sz_pool, s_bpt; 5711 static const BYTE gpt_mbr[16] = {0x00, 0x00, 0x02, 0x00, 0xEE, 0xFE, 0xFF, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF}; 5712 5713 #if FF_MAX_SS != FF_MIN_SS 5714 if (disk_ioctl(drv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; /* Get sector size */ 5715 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; 5716 #else 5717 ss = FF_MAX_SS; 5718 #endif 5719 rnd = GET_FATTIME(); /* Random seed */ 5720 align = GPT_ALIGN / ss; /* Partition alignment [sector] */ 5721 sz_pt = GPT_ITEMS * SZ_GPTE / ss; /* Size of PT [sector] */ 5722 s_bpt = sz_drv - sz_pt - 1; /* Backup PT start sector */ 5723 s_lba64 = 2 + sz_pt; /* First allocatable sector */ 5724 sz_pool = s_bpt - s_lba64; /* Size of allocatable area */ 5725 bcc = 0xFFFFFFFF; n_lba64 = 1; 5726 pi = si = 0; /* partition table index, size table index */ 5727 do { 5728 if (pi * SZ_GPTE % ss == 0) mem_set(buf, 0, ss); /* Clean the buffer if needed */ 5729 if (n_lba64 != 0) { /* Is the size table not termintated? */ 5730 s_lba64 = (s_lba64 + align - 1) & ((QWORD)0 - align); /* Align partition start */ 5731 n_lba64 = plst[si++]; /* Get a partition size */ 5732 if (n_lba64 <= 100) { /* Is the size in percentage? */ 5733 n_lba64 = sz_pool * n_lba64 / 100; 5734 n_lba64 = (n_lba64 + align - 1) & ((QWORD)0 - align); /* Align partition end (only if in percentage) */ 5735 } 5736 if (s_lba64 + n_lba64 > s_bpt) { /* Clip at end of the pool */ 5737 n_lba64 = (s_lba64 < s_bpt) ? s_bpt - s_lba64 : 0; 5738 } 5739 } 5740 if (n_lba64 != 0) { /* Add a partition? */ 5741 ofs = pi * SZ_GPTE % ss; 5742 mem_cpy(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16); /* Partition GUID (Microsoft Basic Data) */ 5743 rnd = make_rand(rnd, buf + ofs + GPTE_UpGuid, 16); /* Unique partition GUID */ 5744 st_qword(buf + ofs + GPTE_FstLba, s_lba64); /* Partition start LBA */ 5745 st_qword(buf + ofs + GPTE_LstLba, s_lba64 + n_lba64 - 1); /* Partition end LBA */ 5746 s_lba64 += n_lba64; /* Next partition LBA */ 5747 } 5748 if ((pi + 1) * SZ_GPTE % ss == 0) { /* Write the buffer if it is filled up */ 5749 for (i = 0; i < ss; bcc = crc32(bcc, buf[i++])) ; /* Calculate table check sum */ 5750 if (disk_write(drv, buf, 2 + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Primary table */ 5751 if (disk_write(drv, buf, s_bpt + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Secondary table */ 5752 } 5753 } while (++pi < GPT_ITEMS); 5754 5755 /* Create primary GPT header */ 5756 mem_set(buf, 0, ss); 5757 mem_cpy(buf + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16); /* Signature, version (1.0) and size (92) */ 5758 st_dword(buf + GPTH_PtBcc, ~bcc); /* Table check sum */ 5759 st_qword(buf + GPTH_CurLba, 1); /* LBA of this header */ 5760 st_qword(buf + GPTH_BakLba, sz_drv - 1); /* LBA of another header */ 5761 st_qword(buf + GPTH_FstLba, 2 + sz_pt); /* LBA of first allocatable sector */ 5762 st_qword(buf + GPTH_LstLba, s_bpt - 1); /* LBA of last allocatable sector */ 5763 st_dword(buf + GPTH_PteSize, SZ_GPTE); /* Size of a table entry */ 5764 st_dword(buf + GPTH_PtNum, GPT_ITEMS); /* Number of table entries */ 5765 st_dword(buf + GPTH_PtOfs, 2); /* LBA of this table */ 5766 rnd = make_rand(rnd, buf + GPTH_DskGuid, 16); /* Disk GUID */ 5767 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */ 5768 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */ 5769 if (disk_write(drv, buf, 1, 1) != RES_OK) return FR_DISK_ERR; 5770 5771 /* Create secondary GPT header */ 5772 st_qword(buf + GPTH_CurLba, sz_drv - 1); /* LBA of this header */ 5773 st_qword(buf + GPTH_BakLba, 1); /* LBA of another header */ 5774 st_qword(buf + GPTH_PtOfs, s_bpt); /* LBA of this table */ 5775 st_dword(buf + GPTH_Bcc, 0); 5776 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */ 5777 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */ 5778 if (disk_write(drv, buf, sz_drv - 1, 1) != RES_OK) return FR_DISK_ERR; 5779 5780 /* Create protective MBR */ 5781 mem_set(buf, 0, ss); 5782 mem_cpy(buf + MBR_Table, gpt_mbr, 16); /* Create a GPT partition */ 5783 st_word(buf + BS_55AA, 0xAA55); 5784 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; 5785 5786 } else 5787 #endif 5788 { /* Create partitions in MBR */ 5789 sz_drv32 = (DWORD)sz_drv; 5790 n_sc = N_SEC_TRACK; /* Determine drive CHS without any consideration of the drive geometry */ 5791 for (n_hd = 8; n_hd != 0 && sz_drv32 / n_hd / n_sc > 1024; n_hd *= 2) ; 5792 if (n_hd == 0) n_hd = 255; /* Number of heads needs to be <256 */ 5793 5794 mem_set(buf, 0, FF_MAX_SS); /* Clear MBR */ 5795 pte = buf + MBR_Table; /* Partition table in the MBR */ 5796 for (i = 0, s_lba32 = n_sc; i < 4 && s_lba32 != 0 && s_lba32 < sz_drv32; i++, s_lba32 += n_lba32) { 5797 n_lba32 = (DWORD)plst[i]; /* Get partition size */ 5798 if (n_lba32 <= 100) n_lba32 = (n_lba32 == 100) ? sz_drv32 : sz_drv32 / 100 * n_lba32; /* Size in percentage? */ 5799 if (s_lba32 + n_lba32 > sz_drv32 || s_lba32 + n_lba32 < s_lba32) n_lba32 = sz_drv32 - s_lba32; /* Clip at drive size */ 5800 if (n_lba32 == 0) break; /* End of table or no sector to allocate? */ 5801 5802 st_dword(pte + PTE_StLba, s_lba32); /* Start LBA */ 5803 st_dword(pte + PTE_SizLba, n_lba32); /* Number of sectors */ 5804 pte[PTE_System] = (BYTE)sys; /* System type */ 5805 5806 cy = (UINT)(s_lba32 / n_sc / n_hd); /* Start cylinder */ 5807 hd = (BYTE)(s_lba32 / n_sc % n_hd); /* Start head */ 5808 sc = (BYTE)(s_lba32 % n_sc + 1); /* Start sector */ 5809 pte[PTE_StHead] = hd; 5810 pte[PTE_StSec] = (BYTE)((cy >> 2 & 0xC0) | sc); 5811 pte[PTE_StCyl] = (BYTE)cy; 5812 5813 cy = (UINT)((s_lba32 + n_lba32 - 1) / n_sc / n_hd); /* End cylinder */ 5814 hd = (BYTE)((s_lba32 + n_lba32 - 1) / n_sc % n_hd); /* End head */ 5815 sc = (BYTE)((s_lba32 + n_lba32 - 1) % n_sc + 1); /* End sector */ 5816 pte[PTE_EdHead] = hd; 5817 pte[PTE_EdSec] = (BYTE)((cy >> 2 & 0xC0) | sc); 5818 pte[PTE_EdCyl] = (BYTE)cy; 5819 5820 pte += SZ_PTE; /* Next entry */ 5821 } 5822 5823 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */ 5824 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */ 5825 } 5826 5827 return FR_OK; 5828 } 5829 5830 5831 5832 FRESULT f_mkfs ( 5833 const TCHAR* path, /* Logical drive number */ 5834 const MKFS_PARM* opt, /* Format options */ 5835 void* work, /* Pointer to working buffer (null: use heap memory) */ 5836 UINT len /* Size of working buffer [byte] */ 5837 ) 5838 { 5839 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */ 5840 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */ 5841 static const MKFS_PARM defopt = {FM_ANY, 0, 0, 0, 0}; /* Default parameter */ 5842 BYTE fsopt, fsty, sys, *buf, *pte, pdrv, ipart; 5843 WORD ss; /* Sector size */ 5844 DWORD sz_buf, sz_blk, n_clst, pau, nsect, n; 5845 LBA_t sz_vol, b_vol, b_fat, b_data; /* Size of volume, Base LBA of volume, fat, data */ 5846 LBA_t sect, lba[2]; 5847 DWORD sz_rsv, sz_fat, sz_dir, sz_au; /* Size of reserved, fat, dir, data, cluster */ 5848 UINT n_fat, n_root, i; /* Index, Number of FATs and Number of roor dir entries */ 5849 int vol; 5850 DSTATUS ds; 5851 FRESULT fr; 5852 5853 5854 /* Check mounted drive and clear work area */ 5855 vol = get_ldnumber(&path); /* Get target logical drive */ 5856 if (vol < 0) return FR_INVALID_DRIVE; 5857 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the fs object if mounted */ 5858 pdrv = LD2PD(vol); /* Physical drive */ 5859 ipart = LD2PT(vol); /* Partition (0:create as new, 1..:get from partition table) */ 5860 if (!opt) opt = &defopt; /* Use default parameter if it is not given */ 5861 5862 /* Get physical drive status (sz_drv, sz_blk, ss) */ 5863 ds = disk_initialize(pdrv); 5864 if (ds & STA_NOINIT) return FR_NOT_READY; 5865 if (ds & STA_PROTECT) return FR_WRITE_PROTECTED; 5866 sz_blk = opt->align; 5867 if (sz_blk == 0 && disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK) sz_blk = 1; 5868 if (sz_blk == 0 || sz_blk > 0x8000 || (sz_blk & (sz_blk - 1))) sz_blk = 1; 5869 #if FF_MAX_SS != FF_MIN_SS 5870 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; 5871 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; 5872 #else 5873 ss = FF_MAX_SS; 5874 #endif 5875 /* Options for FAT sub-type and FAT parameters */ 5876 fsopt = opt->fmt & (FM_ANY | FM_SFD); 5877 n_fat = (opt->n_fat >= 1 && opt->n_fat <= 2) ? opt->n_fat : 1; 5878 n_root = (opt->n_root >= 1 && opt->n_root <= 32768 && (opt->n_root % (ss / SZDIRE)) == 0) ? opt->n_root : 512; 5879 sz_au = (opt->au_size <= 0x1000000 && (opt->au_size & (opt->au_size - 1)) == 0) ? opt->au_size : 0; 5880 sz_au /= ss; /* Byte --> Sector */ 5881 5882 /* Get working buffer */ 5883 sz_buf = len / ss; /* Size of working buffer [sector] */ 5884 if (sz_buf == 0) return FR_NOT_ENOUGH_CORE; 5885 buf = (BYTE*)work; /* Working buffer */ 5886 #if FF_USE_LFN == 3 5887 if (!buf) buf = ff_memalloc(sz_buf * ss); /* Use heap memory for working buffer */ 5888 #endif 5889 if (!buf) return FR_NOT_ENOUGH_CORE; 5890 5891 /* Determine where the volume to be located (b_vol, sz_vol) */ 5892 b_vol = sz_vol = 0; 5893 if (FF_MULTI_PARTITION && ipart != 0) { /* Is the volume associated with any specific partition? */ 5894 /* Get partition location from the existing partition table */ 5895 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */ 5896 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */ 5897 #if FF_LBA64 5898 if (buf[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */ 5899 DWORD n_ent, ofs; 5900 QWORD pt_lba; 5901 5902 /* Get the partition location from GPT */ 5903 if (disk_read(pdrv, buf, 1, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load GPT header sector (next to MBR) */ 5904 if (!test_gpt_header(buf)) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if GPT header is valid */ 5905 n_ent = ld_dword(buf + GPTH_PtNum); /* Number of entries */ 5906 pt_lba = ld_qword(buf + GPTH_PtOfs); /* Table start sector */ 5907 ofs = i = 0; 5908 while (n_ent) { /* Find MS Basic partition with order of ipart */ 5909 if (ofs == 0 && disk_read(pdrv, buf, pt_lba++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Get PT sector */ 5910 if (!mem_cmp(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16) && ++i == ipart) { /* MS basic data partition? */ 5911 b_vol = ld_qword(buf + ofs + GPTE_FstLba); 5912 sz_vol = ld_qword(buf + ofs + GPTE_LstLba) - b_vol + 1; 5913 break; 5914 } 5915 n_ent--; ofs = (ofs + SZ_GPTE) % ss; /* Next entry */ 5916 } 5917 if (n_ent == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* Partition not found */ 5918 fsopt |= 0x80; /* Partitioning is in GPT */ 5919 } else 5920 #endif 5921 { /* Get the partition location from MBR partition table */ 5922 pte = buf + (MBR_Table + (ipart - 1) * SZ_PTE); 5923 if (ipart > 4 || pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */ 5924 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */ 5925 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */ 5926 } 5927 } else { /* The volume is associated with a physical drive */ 5928 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 5929 if (!(fsopt & FM_SFD)) { /* To be partitioned? */ 5930 /* Create a single-partition on the drive in this function */ 5931 #if FF_LBA64 5932 if (sz_vol >= FF_MIN_GPT) { /* Which partition type to create, MBR or GPT? */ 5933 fsopt |= 0x80; /* Partitioning is in GPT */ 5934 b_vol = GPT_ALIGN / ss; sz_vol -= b_vol + GPT_ITEMS * SZ_GPTE / ss + 1; /* Estimated partition offset and size */ 5935 } else 5936 #endif 5937 { /* Partitioning is in MBR */ 5938 if (sz_vol > N_SEC_TRACK) { 5939 b_vol = N_SEC_TRACK; sz_vol -= b_vol; /* Estimated partition offset and size */ 5940 } 5941 } 5942 } 5943 } 5944 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */ 5945 5946 /* Now start to create a FAT volume at b_vol and sz_vol */ 5947 5948 do { /* Pre-determine the FAT type */ 5949 if (FF_FS_EXFAT && (fsopt & FM_EXFAT)) { /* exFAT possible? */ 5950 if ((fsopt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || sz_au > 128) { /* exFAT only, vol >= 64MS or sz_au > 128S ? */ 5951 fsty = FS_EXFAT; break; 5952 } 5953 } 5954 #if FF_LBA64 5955 if (sz_vol >= 0x100000000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too large volume for FAT/FAT32 */ 5956 #endif 5957 if (sz_au > 128) sz_au = 128; /* Invalid AU for FAT/FAT32? */ 5958 if (fsopt & FM_FAT32) { /* FAT32 possible? */ 5959 if (!(fsopt & FM_FAT)) { /* no-FAT? */ 5960 fsty = FS_FAT32; break; 5961 } 5962 } 5963 if (!(fsopt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */ 5964 fsty = FS_FAT16; 5965 } while (0); 5966 5967 #if FF_FS_EXFAT 5968 if (fsty == FS_EXFAT) { /* Create an exFAT volume */ 5969 DWORD szb_bit, szb_case, sum, nb, cl, tbl[3]; 5970 WCHAR ch, si; 5971 UINT j, st; 5972 BYTE b; 5973 5974 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume for exFAT? */ 5975 #if FF_USE_TRIM 5976 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */ 5977 disk_ioctl(pdrv, CTRL_TRIM, lba); 5978 #endif 5979 /* Determine FAT location, data location and number of clusters */ 5980 if (sz_au == 0) { /* AU auto-selection */ 5981 sz_au = 8; 5982 if (sz_vol >= 0x80000) sz_au = 64; /* >= 512Ks */ 5983 if (sz_vol >= 0x4000000) sz_au = 256; /* >= 64Ms */ 5984 } 5985 b_fat = b_vol + 32; /* FAT start at offset 32 */ 5986 sz_fat = (DWORD)((sz_vol / sz_au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */ 5987 b_data = (b_fat + sz_fat + sz_blk - 1) & ~((LBA_t)sz_blk - 1); /* Align data area to the erase block boundary */ 5988 if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 5989 n_clst = (DWORD)(sz_vol - (b_data - b_vol)) / sz_au; /* Number of clusters */ 5990 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */ 5991 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */ 5992 5993 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */ 5994 tbl[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss); /* Number of allocation bitmap clusters */ 5995 5996 /* Create a compressed up-case table */ 5997 sect = b_data + sz_au * tbl[0]; /* Table start sector */ 5998 sum = 0; /* Table checksum to be stored in the 82 entry */ 5999 st = 0; si = 0; i = 0; j = 0; szb_case = 0; 6000 do { 6001 switch (st) { 6002 case 0: 6003 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */ 6004 if (ch != si) { 6005 si++; break; /* Store the up-case char if exist */ 6006 } 6007 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */ 6008 if (j >= 128) { 6009 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */ 6010 } 6011 st = 1; /* Do not compress short run */ 6012 /* go to next case */ 6013 case 1: 6014 ch = si++; /* Fill the short run */ 6015 if (--j == 0) st = 0; 6016 break; 6017 6018 default: 6019 ch = (WCHAR)j; si += (WCHAR)j; /* Number of chars to skip */ 6020 st = 0; 6021 } 6022 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */ 6023 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum); 6024 i += 2; szb_case += 2; 6025 if (si == 0 || i == sz_buf * ss) { /* Write buffered data when buffer full or end of process */ 6026 n = (i + ss - 1) / ss; 6027 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6028 sect += n; i = 0; 6029 } 6030 } while (si); 6031 tbl[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss); /* Number of up-case table clusters */ 6032 tbl[2] = 1; /* Number of root dir clusters */ 6033 6034 /* Initialize the allocation bitmap */ 6035 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */ 6036 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */ 6037 do { 6038 mem_set(buf, 0, sz_buf * ss); 6039 for (i = 0; nb >= 8 && i < sz_buf * ss; buf[i++] = 0xFF, nb -= 8) ; 6040 for (b = 1; nb != 0 && i < sz_buf * ss; buf[i] |= b, b <<= 1, nb--) ; 6041 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 6042 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6043 sect += n; nsect -= n; 6044 } while (nsect); 6045 6046 /* Initialize the FAT */ 6047 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */ 6048 j = nb = cl = 0; 6049 do { 6050 mem_set(buf, 0, sz_buf * ss); i = 0; /* Clear work area and reset write index */ 6051 if (cl == 0) { /* Set FAT [0] and FAT[1] */ 6052 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++; 6053 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++; 6054 } 6055 do { /* Create chains of bitmap, up-case and root dir */ 6056 while (nb != 0 && i < sz_buf * ss) { /* Create a chain */ 6057 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF); 6058 i += 4; cl++; nb--; 6059 } 6060 if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */ 6061 } while (nb != 0 && i < sz_buf * ss); 6062 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 6063 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6064 sect += n; nsect -= n; 6065 } while (nsect); 6066 6067 /* Initialize the root directory */ 6068 mem_set(buf, 0, sz_buf * ss); 6069 buf[SZDIRE * 0 + 0] = ET_VLABEL; /* Volume label entry (no label) */ 6070 buf[SZDIRE * 1 + 0] = ET_BITMAP; /* Bitmap entry */ 6071 st_dword(buf + SZDIRE * 1 + 20, 2); /* cluster */ 6072 st_dword(buf + SZDIRE * 1 + 24, szb_bit); /* size */ 6073 buf[SZDIRE * 2 + 0] = ET_UPCASE; /* Up-case table entry */ 6074 st_dword(buf + SZDIRE * 2 + 4, sum); /* sum */ 6075 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); /* cluster */ 6076 st_dword(buf + SZDIRE * 2 + 24, szb_case); /* size */ 6077 sect = b_data + sz_au * (tbl[0] + tbl[1]); nsect = sz_au; /* Start of the root directory and number of sectors */ 6078 do { /* Fill root directory sectors */ 6079 n = (nsect > sz_buf) ? sz_buf : nsect; 6080 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6081 mem_set(buf, 0, ss); 6082 sect += n; nsect -= n; 6083 } while (nsect); 6084 6085 /* Create two set of the exFAT VBR blocks */ 6086 sect = b_vol; 6087 for (n = 0; n < 2; n++) { 6088 /* Main record (+0) */ 6089 mem_set(buf, 0, ss); 6090 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */ 6091 st_qword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */ 6092 st_qword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */ 6093 st_dword(buf + BPB_FatOfsEx, (DWORD)(b_fat - b_vol)); /* FAT offset [sector] */ 6094 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */ 6095 st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol)); /* Data offset [sector] */ 6096 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */ 6097 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */ 6098 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */ 6099 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */ 6100 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */ 6101 for (buf[BPB_SecPerClusEx] = 0, i = sz_au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */ 6102 buf[BPB_NumFATsEx] = 1; /* Number of FATs */ 6103 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */ 6104 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */ 6105 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */ 6106 for (i = sum = 0; i < ss; i++) { /* VBR checksum */ 6107 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum); 6108 } 6109 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6110 /* Extended bootstrap record (+1..+8) */ 6111 mem_set(buf, 0, ss); 6112 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */ 6113 for (j = 1; j < 9; j++) { 6114 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 6115 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6116 } 6117 /* OEM/Reserved record (+9..+10) */ 6118 mem_set(buf, 0, ss); 6119 for ( ; j < 11; j++) { 6120 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 6121 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6122 } 6123 /* Sum record (+11) */ 6124 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */ 6125 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6126 } 6127 6128 } else 6129 #endif /* FF_FS_EXFAT */ 6130 { /* Create an FAT/FAT32 volume */ 6131 do { 6132 pau = sz_au; 6133 /* Pre-determine number of clusters and FAT sub-type */ 6134 if (fsty == FS_FAT32) { /* FAT32 volume */ 6135 if (pau == 0) { /* AU auto-selection */ 6136 n = (DWORD)sz_vol / 0x20000; /* Volume size in unit of 128KS */ 6137 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */ 6138 } 6139 n_clst = (DWORD)sz_vol / pau; /* Number of clusters */ 6140 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */ 6141 sz_rsv = 32; /* Number of reserved sectors */ 6142 sz_dir = 0; /* No static directory */ 6143 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED); 6144 } else { /* FAT volume */ 6145 if (pau == 0) { /* au auto-selection */ 6146 n = (DWORD)sz_vol / 0x1000; /* Volume size in unit of 4KS */ 6147 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */ 6148 } 6149 n_clst = (DWORD)sz_vol / pau; 6150 if (n_clst > MAX_FAT12) { 6151 n = n_clst * 2 + 4; /* FAT size [byte] */ 6152 } else { 6153 fsty = FS_FAT12; 6154 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */ 6155 } 6156 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */ 6157 sz_rsv = 1; /* Number of reserved sectors */ 6158 sz_dir = (DWORD)n_root * SZDIRE / ss; /* Root dir size [sector] */ 6159 } 6160 b_fat = b_vol + sz_rsv; /* FAT base */ 6161 b_data = b_fat + sz_fat * n_fat + sz_dir; /* Data base */ 6162 6163 /* Align data area to erase block boundary (for flash memory media) */ 6164 n = (DWORD)(((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data); /* Sectors to next nearest from current data base */ 6165 if (fsty == FS_FAT32) { /* FAT32: Move FAT */ 6166 sz_rsv += n; b_fat += n; 6167 } else { /* FAT: Expand FAT */ 6168 if (n % n_fat) { /* Adjust fractional error if needed */ 6169 n--; sz_rsv++; b_fat++; 6170 } 6171 sz_fat += n / n_fat; 6172 } 6173 6174 /* Determine number of clusters and final check of validity of the FAT sub-type */ 6175 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 6176 n_clst = ((DWORD)sz_vol - sz_rsv - sz_fat * n_fat - sz_dir) / pau; 6177 if (fsty == FS_FAT32) { 6178 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32? */ 6179 if (sz_au == 0 && (sz_au = pau / 2) != 0) continue; /* Adjust cluster size and retry */ 6180 LEAVE_MKFS(FR_MKFS_ABORTED); 6181 } 6182 } 6183 if (fsty == FS_FAT16) { 6184 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */ 6185 if (sz_au == 0 && (pau * 2) <= 64) { 6186 sz_au = pau * 2; continue; /* Adjust cluster size and retry */ 6187 } 6188 if ((fsopt & FM_FAT32)) { 6189 fsty = FS_FAT32; continue; /* Switch type to FAT32 and retry */ 6190 } 6191 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 6192 LEAVE_MKFS(FR_MKFS_ABORTED); 6193 } 6194 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */ 6195 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 6196 LEAVE_MKFS(FR_MKFS_ABORTED); 6197 } 6198 } 6199 if (fsty == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */ 6200 6201 /* Ok, it is the valid cluster configuration */ 6202 break; 6203 } while (1); 6204 6205 #if FF_USE_TRIM 6206 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */ 6207 disk_ioctl(pdrv, CTRL_TRIM, lba); 6208 #endif 6209 /* Create FAT VBR */ 6210 mem_set(buf, 0, ss); 6211 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */ 6212 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */ 6213 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */ 6214 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */ 6215 buf[BPB_NumFATs] = (BYTE)n_fat; /* Number of FATs */ 6216 st_word(buf + BPB_RootEntCnt, (WORD)((fsty == FS_FAT32) ? 0 : n_root)); /* Number of root directory entries */ 6217 if (sz_vol < 0x10000) { 6218 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */ 6219 } else { 6220 st_dword(buf + BPB_TotSec32, (DWORD)sz_vol); /* Volume size in 32-bit LBA */ 6221 } 6222 buf[BPB_Media] = 0xF8; /* Media descriptor byte */ 6223 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */ 6224 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */ 6225 st_dword(buf + BPB_HiddSec, (DWORD)b_vol); /* Volume offset in the physical drive [sector] */ 6226 if (fsty == FS_FAT32) { 6227 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */ 6228 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */ 6229 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */ 6230 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */ 6231 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */ 6232 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */ 6233 buf[BS_BootSig32] = 0x29; /* Extended boot signature */ 6234 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 6235 } else { 6236 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */ 6237 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */ 6238 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */ 6239 buf[BS_BootSig] = 0x29; /* Extended boot signature */ 6240 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 6241 } 6242 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */ 6243 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */ 6244 6245 /* Create FSINFO record if needed */ 6246 if (fsty == FS_FAT32) { 6247 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */ 6248 mem_set(buf, 0, ss); 6249 st_dword(buf + FSI_LeadSig, 0x41615252); 6250 st_dword(buf + FSI_StrucSig, 0x61417272); 6251 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 6252 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 6253 st_word(buf + BS_55AA, 0xAA55); 6254 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */ 6255 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */ 6256 } 6257 6258 /* Initialize FAT area */ 6259 mem_set(buf, 0, sz_buf * ss); 6260 sect = b_fat; /* FAT start sector */ 6261 for (i = 0; i < n_fat; i++) { /* Initialize FATs each */ 6262 if (fsty == FS_FAT32) { 6263 st_dword(buf + 0, 0xFFFFFFF8); /* FAT[0] */ 6264 st_dword(buf + 4, 0xFFFFFFFF); /* FAT[1] */ 6265 st_dword(buf + 8, 0x0FFFFFFF); /* FAT[2] (root directory) */ 6266 } else { 6267 st_dword(buf + 0, (fsty == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* FAT[0] and FAT[1] */ 6268 } 6269 nsect = sz_fat; /* Number of FAT sectors */ 6270 do { /* Fill FAT sectors */ 6271 n = (nsect > sz_buf) ? sz_buf : nsect; 6272 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6273 mem_set(buf, 0, ss); /* Rest of FAT all are cleared */ 6274 sect += n; nsect -= n; 6275 } while (nsect); 6276 } 6277 6278 /* Initialize root directory (fill with zero) */ 6279 nsect = (fsty == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */ 6280 do { 6281 n = (nsect > sz_buf) ? sz_buf : nsect; 6282 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6283 sect += n; nsect -= n; 6284 } while (nsect); 6285 } 6286 6287 /* A FAT volume has been created here */ 6288 6289 /* Determine system ID in the MBR partition table */ 6290 if (FF_FS_EXFAT && fsty == FS_EXFAT) { 6291 sys = 0x07; /* exFAT */ 6292 } else { 6293 if (fsty == FS_FAT32) { 6294 sys = 0x0C; /* FAT32X */ 6295 } else { 6296 if (sz_vol >= 0x10000) { 6297 sys = 0x06; /* FAT12/16 (large) */ 6298 } else { 6299 sys = (fsty == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */ 6300 } 6301 } 6302 } 6303 6304 /* Update partition information */ 6305 if (FF_MULTI_PARTITION && ipart != 0) { /* Volume is in the existing partition */ 6306 if (!FF_LBA64 || !(fsopt & 0x80)) { 6307 /* Update system ID in the partition table */ 6308 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */ 6309 buf[MBR_Table + (ipart - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */ 6310 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */ 6311 } 6312 } else { /* Volume as a new single partition */ 6313 if (!(fsopt & FM_SFD)) { /* Create partition table if not in SFD */ 6314 lba[0] = sz_vol, lba[1] = 0; 6315 fr = create_partition(pdrv, lba, sys, buf); 6316 if (fr != FR_OK) LEAVE_MKFS(fr); 6317 } 6318 } 6319 6320 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 6321 6322 LEAVE_MKFS(FR_OK); 6323 } 6324 6325 6326 6327 6328 #if FF_MULTI_PARTITION 6329 /*-----------------------------------------------------------------------*/ 6330 /* Create Partition Table on the Physical Drive */ 6331 /*-----------------------------------------------------------------------*/ 6332 6333 FRESULT f_fdisk ( 6334 BYTE pdrv, /* Physical drive number */ 6335 const LBA_t ptbl[], /* Pointer to the size table for each partitions */ 6336 void* work /* Pointer to the working buffer (null: use heap memory) */ 6337 ) 6338 { 6339 BYTE *buf = (BYTE*)work; 6340 DSTATUS stat; 6341 6342 6343 stat = disk_initialize(pdrv); 6344 if (stat & STA_NOINIT) return FR_NOT_READY; 6345 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 6346 #if FF_USE_LFN == 3 6347 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */ 6348 #endif 6349 if (!buf) return FR_NOT_ENOUGH_CORE; 6350 6351 LEAVE_MKFS(create_partition(pdrv, ptbl, 0x07, buf)); 6352 } 6353 6354 #endif /* FF_MULTI_PARTITION */ 6355 #endif /* !FF_FS_READONLY && FF_USE_MKFS */ 6356 6357 6358 6359 6360 #if FF_USE_STRFUNC 6361 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3) 6362 #error Wrong FF_STRF_ENCODE setting 6363 #endif 6364 /*-----------------------------------------------------------------------*/ 6365 /* Get a String from the File */ 6366 /*-----------------------------------------------------------------------*/ 6367 6368 TCHAR* f_gets ( 6369 TCHAR* buff, /* Pointer to the buffer to store read string */ 6370 int len, /* Size of string buffer (items) */ 6371 FIL* fp /* Pointer to the file object */ 6372 ) 6373 { 6374 int nc = 0; 6375 TCHAR *p = buff; 6376 BYTE s[4]; 6377 UINT rc; 6378 DWORD dc; 6379 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2 6380 WCHAR wc; 6381 #endif 6382 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3 6383 UINT ct; 6384 #endif 6385 6386 #if FF_USE_LFN && FF_LFN_UNICODE /* With code conversion (Unicode API) */ 6387 /* Make a room for the character and terminator */ 6388 if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2; 6389 if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4; 6390 if (FF_LFN_UNICODE == 3) len -= 1; 6391 while (nc < len) { 6392 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */ 6393 f_read(fp, s, 1, &rc); /* Get a code unit */ 6394 if (rc != 1) break; /* EOF? */ 6395 wc = s[0]; 6396 if (dbc_1st((BYTE)wc)) { /* DBC 1st byte? */ 6397 f_read(fp, s, 1, &rc); /* Get DBC 2nd byte */ 6398 if (rc != 1 || !dbc_2nd(s[0])) continue; /* Wrong code? */ 6399 wc = wc << 8 | s[0]; 6400 } 6401 dc = ff_oem2uni(wc, CODEPAGE); /* OEM --> */ 6402 if (dc == 0) continue; 6403 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */ 6404 f_read(fp, s, 2, &rc); /* Get a code unit */ 6405 if (rc != 2) break; /* EOF? */ 6406 dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1]; 6407 if (IsSurrogateL(dc)) continue; /* Broken surrogate pair? */ 6408 if (IsSurrogateH(dc)) { /* High surrogate? */ 6409 f_read(fp, s, 2, &rc); /* Get low surrogate */ 6410 if (rc != 2) break; /* EOF? */ 6411 wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1]; 6412 if (!IsSurrogateL(wc)) continue; /* Broken surrogate pair? */ 6413 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); /* Merge surrogate pair */ 6414 } 6415 #else /* Read a character in UTF-8 */ 6416 f_read(fp, s, 1, &rc); /* Get a code unit */ 6417 if (rc != 1) break; /* EOF? */ 6418 dc = s[0]; 6419 if (dc >= 0x80) { /* Multi-byte sequence? */ 6420 ct = 0; 6421 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } /* 2-byte sequence? */ 6422 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } /* 3-byte sequence? */ 6423 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } /* 4-byte sequence? */ 6424 if (ct == 0) continue; 6425 f_read(fp, s, ct, &rc); /* Get trailing bytes */ 6426 if (rc != ct) break; 6427 rc = 0; 6428 do { /* Merge the byte sequence */ 6429 if ((s[rc] & 0xC0) != 0x80) break; 6430 dc = dc << 6 | (s[rc] & 0x3F); 6431 } while (++rc < ct); 6432 if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue; /* Wrong encoding? */ 6433 } 6434 #endif 6435 /* A code point is avaialble in dc to be output */ 6436 6437 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; /* Strip \r off if needed */ 6438 #if FF_LFN_UNICODE == 1 || FF_LFN_UNICODE == 3 /* Output it in UTF-16/32 encoding */ 6439 if (FF_LFN_UNICODE == 1 && dc >= 0x10000) { /* Out of BMP at UTF-16? */ 6440 *p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++; /* Make and output high surrogate */ 6441 dc = 0xDC00 | (dc & 0x3FF); /* Make low surrogate */ 6442 } 6443 *p++ = (TCHAR)dc; nc++; 6444 if (dc == '\n') break; /* End of line? */ 6445 #elif FF_LFN_UNICODE == 2 /* Output it in UTF-8 encoding */ 6446 if (dc < 0x80) { /* Single byte? */ 6447 *p++ = (TCHAR)dc; 6448 nc++; 6449 if (dc == '\n') break; /* End of line? */ 6450 } else { 6451 if (dc < 0x800) { /* 2-byte sequence? */ 6452 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F)); 6453 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 6454 nc += 2; 6455 } else { 6456 if (dc < 0x10000) { /* 3-byte sequence? */ 6457 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F)); 6458 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 6459 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 6460 nc += 3; 6461 } else { /* 4-byte sequence? */ 6462 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07)); 6463 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F)); 6464 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 6465 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 6466 nc += 4; 6467 } 6468 } 6469 } 6470 #endif 6471 } 6472 6473 #else /* Byte-by-byte read without any conversion (ANSI/OEM API) */ 6474 len -= 1; /* Make a room for the terminator */ 6475 while (nc < len) { 6476 f_read(fp, s, 1, &rc); /* Get a byte */ 6477 if (rc != 1) break; /* EOF? */ 6478 dc = s[0]; 6479 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; 6480 *p++ = (TCHAR)dc; nc++; 6481 if (dc == '\n') break; 6482 } 6483 #endif 6484 6485 *p = 0; /* Terminate the string */ 6486 return nc ? buff : 0; /* When no data read due to EOF or error, return with error. */ 6487 } 6488 6489 6490 6491 6492 #if !FF_FS_READONLY 6493 #include <stdarg.h> 6494 /*-----------------------------------------------------------------------*/ 6495 /* Put a Character to the File (sub-functions) */ 6496 /*-----------------------------------------------------------------------*/ 6497 6498 /* Putchar output buffer and work area */ 6499 6500 typedef struct { 6501 FIL *fp; /* Ptr to the writing file */ 6502 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */ 6503 #if FF_USE_LFN && FF_LFN_UNICODE == 1 6504 WCHAR hs; 6505 #elif FF_USE_LFN && FF_LFN_UNICODE == 2 6506 BYTE bs[4]; 6507 UINT wi, ct; 6508 #endif 6509 BYTE buf[64]; /* Write buffer */ 6510 } putbuff; 6511 6512 6513 /* Buffered write with code conversion */ 6514 6515 static void putc_bfd (putbuff* pb, TCHAR c) 6516 { 6517 UINT n; 6518 int i, nc; 6519 #if FF_USE_LFN && FF_LFN_UNICODE 6520 WCHAR hs, wc; 6521 #if FF_LFN_UNICODE == 2 6522 DWORD dc; 6523 TCHAR *tp; 6524 #endif 6525 #endif 6526 6527 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */ 6528 putc_bfd(pb, '\r'); 6529 } 6530 6531 i = pb->idx; /* Write index of pb->buf[] */ 6532 if (i < 0) return; 6533 nc = pb->nchr; /* Write unit counter */ 6534 6535 #if FF_USE_LFN && FF_LFN_UNICODE 6536 #if FF_LFN_UNICODE == 1 /* UTF-16 input */ 6537 if (IsSurrogateH(c)) { /* High surrogate? */ 6538 pb->hs = c; return; /* Save it for next */ 6539 } 6540 hs = pb->hs; pb->hs = 0; 6541 if (hs != 0) { /* There is a leading high surrogate */ 6542 if (!IsSurrogateL(c)) hs = 0; /* Discard high surrogate if not a surrogate pair */ 6543 } else { 6544 if (IsSurrogateL(c)) return; /* Discard stray low surrogate */ 6545 } 6546 wc = c; 6547 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */ 6548 for (;;) { 6549 if (pb->ct == 0) { /* Out of multi-byte sequence? */ 6550 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */ 6551 if ((BYTE)c < 0x80) break; /* Single byte? */ 6552 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte sequence? */ 6553 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte sequence? */ 6554 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte sequence? */ 6555 return; 6556 } else { /* In the multi-byte sequence */ 6557 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */ 6558 pb->ct = 0; continue; 6559 } 6560 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */ 6561 if (--pb->ct == 0) break; /* End of multi-byte sequence? */ 6562 return; 6563 } 6564 } 6565 tp = (TCHAR*)pb->bs; 6566 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */ 6567 if (dc == 0xFFFFFFFF) return; /* Wrong code? */ 6568 wc = (WCHAR)dc; 6569 hs = (WCHAR)(dc >> 16); 6570 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */ 6571 if (IsSurrogate(c) || c >= 0x110000) return; /* Discard invalid code */ 6572 if (c >= 0x10000) { /* Out of BMP? */ 6573 hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); /* Make high surrogate */ 6574 wc = 0xDC00 | (c & 0x3FF); /* Make low surrogate */ 6575 } else { 6576 hs = 0; 6577 wc = (WCHAR)c; 6578 } 6579 #endif 6580 /* A code point in UTF-16 is available in hs and wc */ 6581 6582 #if FF_STRF_ENCODE == 1 /* Write a code point in UTF-16LE */ 6583 if (hs != 0) { /* Surrogate pair? */ 6584 st_word(&pb->buf[i], hs); 6585 i += 2; 6586 nc++; 6587 } 6588 st_word(&pb->buf[i], wc); 6589 i += 2; 6590 #elif FF_STRF_ENCODE == 2 /* Write a code point in UTF-16BE */ 6591 if (hs != 0) { /* Surrogate pair? */ 6592 pb->buf[i++] = (BYTE)(hs >> 8); 6593 pb->buf[i++] = (BYTE)hs; 6594 nc++; 6595 } 6596 pb->buf[i++] = (BYTE)(wc >> 8); 6597 pb->buf[i++] = (BYTE)wc; 6598 #elif FF_STRF_ENCODE == 3 /* Write a code point in UTF-8 */ 6599 if (hs != 0) { /* 4-byte sequence? */ 6600 nc += 3; 6601 hs = (hs & 0x3FF) + 0x40; 6602 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8); 6603 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F)); 6604 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F)); 6605 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 6606 } else { 6607 if (wc < 0x80) { /* Single byte? */ 6608 pb->buf[i++] = (BYTE)wc; 6609 } else { 6610 if (wc < 0x800) { /* 2-byte sequence? */ 6611 nc += 1; 6612 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6); 6613 } else { /* 3-byte sequence */ 6614 nc += 2; 6615 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12); 6616 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F)); 6617 } 6618 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 6619 } 6620 } 6621 #else /* Write a code point in ANSI/OEM */ 6622 if (hs != 0) return; 6623 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */ 6624 if (wc == 0) return; 6625 if (wc >= 0x100) { 6626 pb->buf[i++] = (BYTE)(wc >> 8); nc++; 6627 } 6628 pb->buf[i++] = (BYTE)wc; 6629 #endif 6630 6631 #else /* ANSI/OEM input (without re-encoding) */ 6632 pb->buf[i++] = (BYTE)c; 6633 #endif 6634 6635 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */ 6636 f_write(pb->fp, pb->buf, (UINT)i, &n); 6637 i = (n == (UINT)i) ? 0 : -1; 6638 } 6639 pb->idx = i; 6640 pb->nchr = nc + 1; 6641 } 6642 6643 6644 /* Flush remaining characters in the buffer */ 6645 6646 static int putc_flush (putbuff* pb) 6647 { 6648 UINT nw; 6649 6650 if ( pb->idx >= 0 /* Flush buffered characters to the file */ 6651 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK 6652 && (UINT)pb->idx == nw) return pb->nchr; 6653 return EOF; 6654 } 6655 6656 6657 /* Initialize write buffer */ 6658 6659 static void putc_init (putbuff* pb, FIL* fp) 6660 { 6661 mem_set(pb, 0, sizeof (putbuff)); 6662 pb->fp = fp; 6663 } 6664 6665 6666 6667 int f_putc ( 6668 TCHAR c, /* A character to be output */ 6669 FIL* fp /* Pointer to the file object */ 6670 ) 6671 { 6672 putbuff pb; 6673 6674 6675 putc_init(&pb, fp); 6676 putc_bfd(&pb, c); /* Put the character */ 6677 return putc_flush(&pb); 6678 } 6679 6680 6681 6682 6683 /*-----------------------------------------------------------------------*/ 6684 /* Put a String to the File */ 6685 /*-----------------------------------------------------------------------*/ 6686 6687 int f_puts ( 6688 const TCHAR* str, /* Pointer to the string to be output */ 6689 FIL* fp /* Pointer to the file object */ 6690 ) 6691 { 6692 putbuff pb; 6693 6694 6695 putc_init(&pb, fp); 6696 while (*str) putc_bfd(&pb, *str++); /* Put the string */ 6697 return putc_flush(&pb); 6698 } 6699 6700 6701 6702 6703 /*-----------------------------------------------------------------------*/ 6704 /* Put a Formatted String to the File */ 6705 /*-----------------------------------------------------------------------*/ 6706 6707 int f_printf ( 6708 FIL* fp, /* Pointer to the file object */ 6709 const TCHAR* fmt, /* Pointer to the format string */ 6710 ... /* Optional arguments... */ 6711 ) 6712 { 6713 va_list arp; 6714 putbuff pb; 6715 BYTE f, r; 6716 UINT i, j, w; 6717 DWORD v; 6718 TCHAR c, d, str[32], *p; 6719 6720 6721 putc_init(&pb, fp); 6722 6723 va_start(arp, fmt); 6724 6725 for (;;) { 6726 c = *fmt++; 6727 if (c == 0) break; /* End of string */ 6728 if (c != '%') { /* Non escape character */ 6729 putc_bfd(&pb, c); 6730 continue; 6731 } 6732 w = f = 0; 6733 c = *fmt++; 6734 if (c == '0') { /* Flag: '0' padding */ 6735 f = 1; c = *fmt++; 6736 } else { 6737 if (c == '-') { /* Flag: left justified */ 6738 f = 2; c = *fmt++; 6739 } 6740 } 6741 if (c == '*') { /* Minimum width by argument */ 6742 w = va_arg(arp, int); 6743 c = *fmt++; 6744 } else { 6745 while (IsDigit(c)) { /* Minimum width */ 6746 w = w * 10 + c - '0'; 6747 c = *fmt++; 6748 } 6749 } 6750 if (c == 'l' || c == 'L') { /* Type prefix: Size is long int */ 6751 f |= 4; c = *fmt++; 6752 } 6753 if (c == 0) break; 6754 d = c; 6755 if (IsLower(d)) d -= 0x20; 6756 switch (d) { /* Atgument type is... */ 6757 case 'S' : /* String */ 6758 p = va_arg(arp, TCHAR*); 6759 for (j = 0; p[j]; j++) ; 6760 if (!(f & 2)) { /* Right padded */ 6761 while (j++ < w) putc_bfd(&pb, ' ') ; 6762 } 6763 while (*p) putc_bfd(&pb, *p++) ; /* String body */ 6764 while (j++ < w) putc_bfd(&pb, ' ') ; /* Left padded */ 6765 continue; 6766 6767 case 'C' : /* Character */ 6768 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 6769 6770 case 'B' : /* Unsigned binary */ 6771 r = 2; break; 6772 6773 case 'O' : /* Unsigned octal */ 6774 r = 8; break; 6775 6776 case 'D' : /* Signed decimal */ 6777 case 'U' : /* Unsigned decimal */ 6778 r = 10; break; 6779 6780 case 'X' : /* Unsigned hexdecimal */ 6781 r = 16; break; 6782 6783 default: /* Unknown type (pass-through) */ 6784 putc_bfd(&pb, c); continue; 6785 } 6786 6787 /* Get an argument and put it in numeral */ 6788 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 6789 if (d == 'D' && (v & 0x80000000)) { 6790 v = 0 - v; 6791 f |= 8; 6792 } 6793 i = 0; 6794 do { 6795 d = (TCHAR)(v % r); v /= r; 6796 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 6797 str[i++] = d + '0'; 6798 } while (v && i < sizeof str / sizeof *str); 6799 if (f & 8) str[i++] = '-'; 6800 j = i; d = (f & 1) ? '0' : ' '; 6801 if (!(f & 2)) { 6802 while (j++ < w) putc_bfd(&pb, d); /* Right pad */ 6803 } 6804 do { 6805 putc_bfd(&pb, str[--i]); /* Number body */ 6806 } while (i); 6807 while (j++ < w) putc_bfd(&pb, d); /* Left pad */ 6808 } 6809 6810 va_end(arp); 6811 6812 return putc_flush(&pb); 6813 } 6814 6815 #endif /* !FF_FS_READONLY */ 6816 #endif /* FF_USE_STRFUNC */ 6817 6818 6819 6820 #if FF_CODE_PAGE == 0 6821 /*-----------------------------------------------------------------------*/ 6822 /* Set Active Codepage for the Path Name */ 6823 /*-----------------------------------------------------------------------*/ 6824 6825 FRESULT f_setcp ( 6826 WORD cp /* Value to be set as active code page */ 6827 ) 6828 { 6829 static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0}; 6830 static const BYTE* const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0}; 6831 UINT i; 6832 6833 6834 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */ 6835 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */ 6836 6837 CodePage = cp; 6838 if (cp >= 900) { /* DBCS */ 6839 ExCvt = 0; 6840 DbcTbl = tables[i]; 6841 } else { /* SBCS */ 6842 ExCvt = tables[i]; 6843 DbcTbl = 0; 6844 } 6845 return FR_OK; 6846 } 6847 #endif /* FF_CODE_PAGE == 0 */ 6848