takashi kadono
/
Nucleo446_SSD1331
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ff.cpp
00001 /*----------------------------------------------------------------------------/ 00002 / FatFs - Generic FAT Filesystem Module R0.13a / 00003 /-----------------------------------------------------------------------------/ 00004 / 00005 / Copyright (C) 2017, ChaN, all right reserved. 00006 / 00007 / FatFs module is an open source software. Redistribution and use of FatFs in 00008 / source and binary forms, with or without modification, are permitted provided 00009 / that the following condition is met: 00010 / 00011 / 1. Redistributions of source code must retain the above copyright notice, 00012 / this condition and the following disclaimer. 00013 / 00014 / This software is provided by the copyright holder and contributors "AS IS" 00015 / and any warranties related to this software are DISCLAIMED. 00016 / The copyright owner or contributors be NOT LIABLE for any damages caused 00017 / by use of this software. 00018 / 00019 /----------------------------------------------------------------------------*/ 00020 00021 00022 #include "ff.h" /* Declarations of FatFs API */ 00023 #include "diskio.h" /* Declarations of device I/O functions */ 00024 00025 00026 /*-------------------------------------------------------------------------- 00027 00028 Module Private Definitions 00029 00030 ---------------------------------------------------------------------------*/ 00031 00032 #if FF_DEFINED != 89352 /* Revision ID */ 00033 #error Wrong include file (ff.h). 00034 #endif 00035 00036 00037 /* Character code support macros */ 00038 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z') 00039 #define IsLower(c) ((c) >= 'a' && (c) <= 'z') 00040 #define IsDigit(c) ((c) >= '0' && (c) <= '9') 00041 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF) 00042 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF) 00043 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF) 00044 00045 00046 /* Additional file attribute bits for internal use */ 00047 #define AM_VOL 0x08 /* Volume label */ 00048 #define AM_LFN 0x0F /* LFN entry */ 00049 #define AM_MASK 0x3F /* Mask of defined bits */ 00050 00051 00052 /* Additional file access control and file status flags for internal use */ 00053 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */ 00054 #define FA_MODIFIED 0x40 /* File has been modified */ 00055 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */ 00056 00057 00058 /* Name status flags in fn[11] */ 00059 #define NSFLAG 11 /* Index of the name status byte */ 00060 #define NS_LOSS 0x01 /* Out of 8.3 format */ 00061 #define NS_LFN 0x02 /* Force to create LFN entry */ 00062 #define NS_LAST 0x04 /* Last segment */ 00063 #define NS_BODY 0x08 /* Lower case flag (body) */ 00064 #define NS_EXT 0x10 /* Lower case flag (ext) */ 00065 #define NS_DOT 0x20 /* Dot entry */ 00066 #define NS_NOLFN 0x40 /* Do not find LFN */ 00067 #define NS_NONAME 0x80 /* Not followed */ 00068 00069 00070 /* Limits and boundaries */ 00071 #define MAX_DIR 0x200000 /* Max size of FAT directory */ 00072 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */ 00073 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */ 00074 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */ 00075 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */ 00076 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */ 00077 00078 00079 /* FatFs refers the FAT structure as simple byte array instead of structure member 00080 / because the C structure is not binary compatible between different platforms */ 00081 00082 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */ 00083 #define BS_OEMName 3 /* OEM name (8-byte) */ 00084 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */ 00085 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */ 00086 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */ 00087 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */ 00088 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */ 00089 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */ 00090 #define BPB_Media 21 /* Media descriptor byte (BYTE) */ 00091 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */ 00092 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */ 00093 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */ 00094 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */ 00095 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */ 00096 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */ 00097 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */ 00098 #define BS_BootSig 38 /* Extended boot signature (BYTE) */ 00099 #define BS_VolID 39 /* Volume serial number (DWORD) */ 00100 #define BS_VolLab 43 /* Volume label string (8-byte) */ 00101 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */ 00102 #define BS_BootCode 62 /* Boot code (448-byte) */ 00103 #define BS_55AA 510 /* Signature word (WORD) */ 00104 00105 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */ 00106 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */ 00107 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */ 00108 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */ 00109 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */ 00110 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */ 00111 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */ 00112 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */ 00113 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */ 00114 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */ 00115 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */ 00116 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */ 00117 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */ 00118 00119 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */ 00120 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */ 00121 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */ 00122 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */ 00123 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */ 00124 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */ 00125 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */ 00126 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */ 00127 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */ 00128 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */ 00129 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD) */ 00130 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */ 00131 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */ 00132 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */ 00133 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */ 00134 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */ 00135 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */ 00136 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */ 00137 00138 #define DIR_Name 0 /* Short file name (11-byte) */ 00139 #define DIR_Attr 11 /* Attribute (BYTE) */ 00140 #define DIR_NTres 12 /* Lower case flag (BYTE) */ 00141 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */ 00142 #define DIR_CrtTime 14 /* Created time (DWORD) */ 00143 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */ 00144 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */ 00145 #define DIR_ModTime 22 /* Modified time (DWORD) */ 00146 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */ 00147 #define DIR_FileSize 28 /* File size (DWORD) */ 00148 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */ 00149 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */ 00150 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */ 00151 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */ 00152 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */ 00153 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */ 00154 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */ 00155 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */ 00156 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */ 00157 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */ 00158 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */ 00159 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */ 00160 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */ 00161 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */ 00162 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */ 00163 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */ 00164 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */ 00165 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */ 00166 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */ 00167 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */ 00168 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */ 00169 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */ 00170 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */ 00171 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */ 00172 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */ 00173 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */ 00174 00175 #define SZDIRE 32 /* Size of a directory entry */ 00176 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */ 00177 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */ 00178 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */ 00179 00180 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */ 00181 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */ 00182 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */ 00183 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */ 00184 00185 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */ 00186 #define SZ_PTE 16 /* MBR: Size of a partition table entry */ 00187 #define PTE_Boot 0 /* MBR PTE: Boot indicator */ 00188 #define PTE_StHead 1 /* MBR PTE: Start head */ 00189 #define PTE_StSec 2 /* MBR PTE: Start sector */ 00190 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */ 00191 #define PTE_System 4 /* MBR PTE: System ID */ 00192 #define PTE_EdHead 5 /* MBR PTE: End head */ 00193 #define PTE_EdSec 6 /* MBR PTE: End sector */ 00194 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */ 00195 #define PTE_StLba 8 /* MBR PTE: Start in LBA */ 00196 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */ 00197 00198 00199 /* Post process on fatal error in the file operations */ 00200 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); } 00201 00202 00203 /* Re-entrancy related */ 00204 #if FF_FS_REENTRANT 00205 #if FF_USE_LFN == 1 00206 #error Static LFN work area cannot be used at thread-safe configuration 00207 #endif 00208 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; } 00209 #else 00210 #define LEAVE_FF(fs, res) return res 00211 #endif 00212 00213 00214 /* Definitions of volume - physical location conversion */ 00215 #if FF_MULTI_PARTITION 00216 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */ 00217 #define LD2PT(vol) VolToPart[vol].pt /* Get partition index */ 00218 #else 00219 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is bound to the same physical drive number */ 00220 #define LD2PT(vol) 0 /* Find first valid partition or in SFD */ 00221 #endif 00222 00223 00224 /* Definitions of sector size */ 00225 #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) 00226 #error Wrong sector size configuration 00227 #endif 00228 #if FF_MAX_SS == FF_MIN_SS 00229 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */ 00230 #else 00231 #define SS(fs) ((fs)->ssize) /* Variable sector size */ 00232 #endif 00233 00234 00235 /* Timestamp */ 00236 #if FF_FS_NORTC == 1 00237 #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 00238 #error Invalid FF_FS_NORTC settings 00239 #endif 00240 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16) 00241 #else 00242 #define GET_FATTIME() get_fattime() 00243 #endif 00244 00245 00246 /* File lock controls */ 00247 #if FF_FS_LOCK != 0 00248 #if FF_FS_READONLY 00249 #error FF_FS_LOCK must be 0 at read-only configuration 00250 #endif 00251 typedef struct { 00252 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */ 00253 DWORD clu; /* Object ID 2, containing directory (0:root) */ 00254 DWORD ofs; /* Object ID 3, offset in the directory */ 00255 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */ 00256 } FILESEM; 00257 #endif 00258 00259 00260 /* SBCS up-case tables (\x80-\xFF) */ 00261 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00262 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00263 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00264 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00265 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00266 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00267 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00268 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00269 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00270 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00271 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00272 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00273 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00274 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00275 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00276 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00277 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00278 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \ 00279 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \ 00280 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00281 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00282 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00283 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00284 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00285 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00286 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00287 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00288 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00289 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00290 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \ 00291 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00292 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF} 00293 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \ 00294 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00295 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00296 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00297 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00298 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00299 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \ 00300 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00301 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \ 00302 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \ 00303 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00304 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00305 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00306 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \ 00307 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \ 00308 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00309 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \ 00310 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \ 00311 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \ 00312 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \ 00313 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00314 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00315 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \ 00316 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF} 00317 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \ 00318 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \ 00319 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \ 00320 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \ 00321 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00322 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \ 00323 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \ 00324 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF} 00325 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \ 00326 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \ 00327 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00328 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00329 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00330 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00331 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \ 00332 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00333 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \ 00334 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00335 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00336 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00337 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00338 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00339 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00340 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00341 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \ 00342 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \ 00343 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00344 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00345 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00346 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00347 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00348 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00349 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00350 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00351 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00352 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00353 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00354 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00355 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00356 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00357 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \ 00358 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \ 00359 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00360 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00361 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00362 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00363 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00364 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00365 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00366 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00367 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00368 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00369 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00370 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00371 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00372 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00373 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \ 00374 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00375 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00376 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00377 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00378 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00379 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \ 00380 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00381 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00382 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00383 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00384 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00385 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00386 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \ 00387 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \ 00388 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF} 00389 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \ 00390 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \ 00391 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \ 00392 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \ 00393 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \ 00394 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \ 00395 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \ 00396 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF} 00397 00398 00399 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */ 00400 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00} 00401 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00} 00402 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE} 00403 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00} 00404 00405 00406 /* Macros for table definitions */ 00407 #define MERGE_2STR(a, b) a ## b 00408 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp) 00409 00410 00411 00412 00413 /*-------------------------------------------------------------------------- 00414 00415 Module Private Work Area 00416 00417 ---------------------------------------------------------------------------*/ 00418 /* Remark: Variables defined here without initial value shall be guaranteed 00419 / zero/null at start-up. If not, the linker option or start-up routine is 00420 / not compliance with C standard. */ 00421 00422 /*--------------------------------*/ 00423 /* File/Volume controls */ 00424 /*--------------------------------*/ 00425 00426 #if FF_VOLUMES < 1 || FF_VOLUMES > 10 00427 #error Wrong FF_VOLUMES setting 00428 #endif 00429 static FATFS *FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */ 00430 static WORD Fsid; /* File system mount ID */ 00431 00432 #if FF_FS_RPATH != 0 && FF_VOLUMES >= 2 00433 static BYTE CurrVol; /* Current drive */ 00434 #endif 00435 00436 #if FF_FS_LOCK != 0 00437 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */ 00438 #endif 00439 00440 00441 00442 /*--------------------------------*/ 00443 /* LFN/Directory working buffer */ 00444 /*--------------------------------*/ 00445 00446 #if FF_USE_LFN == 0 /* Non-LFN configuration */ 00447 #if FF_FS_EXFAT 00448 #error LFN must be enabled when enable exFAT 00449 #endif 00450 #define DEF_NAMBUF 00451 #define INIT_NAMBUF(fs) 00452 #define FREE_NAMBUF() 00453 #define LEAVE_MKFS(res) return res 00454 00455 #else /* LFN configurations */ 00456 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255 00457 #error Wrong setting of FF_MAX_LFN 00458 #endif 00459 #if FF_LFN_BUF < 12 || FF_SFN_BUF < 12 || FF_LFN_BUF < FF_SFN_BUF 00460 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF 00461 #endif 00462 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 2 00463 #error Wrong setting of FF_LFN_UNICODE 00464 #endif 00465 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 */ 00466 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */ 00467 00468 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */ 00469 #if FF_FS_EXFAT 00470 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */ 00471 #endif 00472 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */ 00473 #define DEF_NAMBUF 00474 #define INIT_NAMBUF(fs) 00475 #define FREE_NAMBUF() 00476 #define LEAVE_MKFS(res) return res 00477 00478 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */ 00479 #if FF_FS_EXFAT 00480 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */ 00481 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; } 00482 #define FREE_NAMBUF() 00483 #else 00484 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */ 00485 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; } 00486 #define FREE_NAMBUF() 00487 #endif 00488 #define LEAVE_MKFS(res) return res 00489 00490 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */ 00491 #if FF_FS_EXFAT 00492 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */ 00493 #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); } 00494 #define FREE_NAMBUF() ff_memfree(lfn) 00495 #else 00496 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */ 00497 #define INIT_NAMBUF(fs) { lfn = (WCHAR *)ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; } 00498 #define FREE_NAMBUF() ff_memfree(lfn) 00499 #endif 00500 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; } 00501 #define MAX_MALLOC 0x8000 00502 00503 #else 00504 #error Wrong setting of FF_USE_LFN 00505 00506 #endif /* FF_USE_LFN == 1 */ 00507 #endif /* FF_USE_LFN == 0 */ 00508 00509 00510 00511 /*--------------------------------*/ 00512 /* Code conversion tables */ 00513 /*--------------------------------*/ 00514 00515 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */ 00516 #define CODEPAGE CodePage 00517 static WORD CodePage; /* Current code page */ 00518 static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */ 00519 static const BYTE Ct437[] = TBL_CT437; 00520 static const BYTE Ct720[] = TBL_CT720; 00521 static const BYTE Ct737[] = TBL_CT737; 00522 static const BYTE Ct771[] = TBL_CT771; 00523 static const BYTE Ct775[] = TBL_CT775; 00524 static const BYTE Ct850[] = TBL_CT850; 00525 static const BYTE Ct852[] = TBL_CT852; 00526 static const BYTE Ct855[] = TBL_CT855; 00527 static const BYTE Ct857[] = TBL_CT857; 00528 static const BYTE Ct860[] = TBL_CT860; 00529 static const BYTE Ct861[] = TBL_CT861; 00530 static const BYTE Ct862[] = TBL_CT862; 00531 static const BYTE Ct863[] = TBL_CT863; 00532 static const BYTE Ct864[] = TBL_CT864; 00533 static const BYTE Ct865[] = TBL_CT865; 00534 static const BYTE Ct866[] = TBL_CT866; 00535 static const BYTE Ct869[] = TBL_CT869; 00536 static const BYTE Dc932[] = TBL_DC932; 00537 static const BYTE Dc936[] = TBL_DC936; 00538 static const BYTE Dc949[] = TBL_DC949; 00539 static const BYTE Dc950[] = TBL_DC950; 00540 00541 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */ 00542 #define CODEPAGE FF_CODE_PAGE 00543 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE); 00544 00545 #else /* Static code page configuration (DBCS) */ 00546 #define CODEPAGE FF_CODE_PAGE 00547 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE); 00548 00549 #endif 00550 00551 00552 00553 00554 /*-------------------------------------------------------------------------- 00555 00556 Module Private Functions 00557 00558 ---------------------------------------------------------------------------*/ 00559 00560 00561 /*-----------------------------------------------------------------------*/ 00562 /* Load/Store multi-byte word in the FAT structure */ 00563 /*-----------------------------------------------------------------------*/ 00564 00565 static 00566 WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */ 00567 { 00568 WORD rv; 00569 00570 rv = ptr[1]; 00571 rv = rv << 8 | ptr[0]; 00572 return rv; 00573 } 00574 00575 static 00576 DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */ 00577 { 00578 DWORD rv; 00579 00580 rv = ptr[3]; 00581 rv = rv << 8 | ptr[2]; 00582 rv = rv << 8 | ptr[1]; 00583 rv = rv << 8 | ptr[0]; 00584 return rv; 00585 } 00586 00587 #if FF_FS_EXFAT 00588 static 00589 QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */ 00590 { 00591 QWORD rv; 00592 00593 rv = ptr[7]; 00594 rv = rv << 8 | ptr[6]; 00595 rv = rv << 8 | ptr[5]; 00596 rv = rv << 8 | ptr[4]; 00597 rv = rv << 8 | ptr[3]; 00598 rv = rv << 8 | ptr[2]; 00599 rv = rv << 8 | ptr[1]; 00600 rv = rv << 8 | ptr[0]; 00601 return rv; 00602 } 00603 #endif 00604 00605 #if !FF_FS_READONLY 00606 static 00607 void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */ 00608 { 00609 *ptr++ = (BYTE)val; val >>= 8; 00610 *ptr++ = (BYTE)val; 00611 } 00612 00613 static 00614 void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */ 00615 { 00616 *ptr++ = (BYTE)val; val >>= 8; 00617 *ptr++ = (BYTE)val; val >>= 8; 00618 *ptr++ = (BYTE)val; val >>= 8; 00619 *ptr++ = (BYTE)val; 00620 } 00621 00622 #if FF_FS_EXFAT 00623 static 00624 void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */ 00625 { 00626 *ptr++ = (BYTE)val; val >>= 8; 00627 *ptr++ = (BYTE)val; val >>= 8; 00628 *ptr++ = (BYTE)val; val >>= 8; 00629 *ptr++ = (BYTE)val; val >>= 8; 00630 *ptr++ = (BYTE)val; val >>= 8; 00631 *ptr++ = (BYTE)val; val >>= 8; 00632 *ptr++ = (BYTE)val; val >>= 8; 00633 *ptr++ = (BYTE)val; 00634 } 00635 #endif 00636 #endif /* !FF_FS_READONLY */ 00637 00638 00639 00640 /*-----------------------------------------------------------------------*/ 00641 /* String functions */ 00642 /*-----------------------------------------------------------------------*/ 00643 00644 /* Copy memory to memory */ 00645 static 00646 void mem_cpy (void* dst, const void* src, UINT cnt) 00647 { 00648 BYTE *d = (BYTE*)dst; 00649 const BYTE *s = (const BYTE*)src; 00650 00651 if (cnt != 0) { 00652 do { 00653 *d++ = *s++; 00654 } while (--cnt); 00655 } 00656 } 00657 00658 00659 /* Fill memory block */ 00660 static 00661 void mem_set (void* dst, int val, UINT cnt) 00662 { 00663 BYTE *d = (BYTE*)dst; 00664 00665 do { 00666 *d++ = (BYTE)val; 00667 } while (--cnt); 00668 } 00669 00670 00671 /* Compare memory block */ 00672 static 00673 int mem_cmp (const void* dst, const void* src, UINT cnt) /* ZR:same, NZ:different */ 00674 { 00675 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src; 00676 int r = 0; 00677 00678 do { 00679 r = *d++ - *s++; 00680 } while (--cnt && r == 0); 00681 00682 return r; 00683 } 00684 00685 00686 /* Check if chr is contained in the string */ 00687 static 00688 int chk_chr (const char* str, int chr) /* NZ:contained, ZR:not contained */ 00689 { 00690 while (*str && *str != chr) str++; 00691 return *str; 00692 } 00693 00694 00695 /* Test if the character is DBC 1st byte */ 00696 static 00697 int dbc_1st (BYTE c) 00698 { 00699 #if FF_CODE_PAGE == 0 /* Variable code page */ 00700 if (DbcTbl && c >= DbcTbl[0]) { 00701 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */ 00702 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */ 00703 } 00704 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */ 00705 if (c >= DbcTbl[0]) { 00706 if (c <= DbcTbl[1]) return 1; 00707 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; 00708 } 00709 #else /* SBCS fixed code page */ 00710 if (c != 0) return 0; /* Always false */ 00711 #endif 00712 return 0; 00713 } 00714 00715 00716 /* Test if the character is DBC 2nd byte */ 00717 static 00718 int dbc_2nd (BYTE c) 00719 { 00720 #if FF_CODE_PAGE == 0 /* Variable code page */ 00721 if (DbcTbl && c >= DbcTbl[4]) { 00722 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */ 00723 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */ 00724 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */ 00725 } 00726 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */ 00727 if (c >= DbcTbl[4]) { 00728 if (c <= DbcTbl[5]) return 1; 00729 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; 00730 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; 00731 } 00732 #else /* SBCS fixed code page */ 00733 if (c != 0) return 0; /* Always false */ 00734 #endif 00735 return 0; 00736 } 00737 00738 00739 #if FF_USE_LFN 00740 00741 /* Get a character from TCHAR string in defined API encodeing */ 00742 static 00743 DWORD tchar2uni ( /* Returns character in UTF-16 encoding (>=0x10000 on double encoding unit, 0xFFFFFFFF on decode error) */ 00744 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */ 00745 ) 00746 { 00747 DWORD uc; 00748 const TCHAR *p = *str; 00749 00750 #if FF_LFN_UNICODE == 1 /* UTF-16 input */ 00751 WCHAR wc; 00752 00753 uc = *p++; 00754 if (IsSurrogate(uc)) { /* Surrogate? */ 00755 wc = *p++; /* Get low surrogate */ 00756 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */ 00757 uc = uc << 16 | wc; 00758 } 00759 00760 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */ 00761 BYTE b; 00762 int nf; 00763 00764 uc = (BYTE)*p++; /* Get a byte */ 00765 if (uc & 0x80) { /* Multiple byte code? */ 00766 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */ 00767 uc &= 0x1F; nf = 1; 00768 } else { 00769 if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */ 00770 uc &= 0x0F; nf = 2; 00771 } else { 00772 if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */ 00773 uc &= 0x07; nf = 3; 00774 } else { /* Wrong sequence */ 00775 return 0xFFFFFFFF; 00776 } 00777 } 00778 } 00779 do { /* Get trailing bytes */ 00780 b = (BYTE)*p++; 00781 if ((b & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */ 00782 uc = uc << 6 | (b & 0x3F); 00783 } while (--nf != 0); 00784 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */ 00785 if (uc >= 0x10000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */ 00786 } 00787 00788 #else /* ANSI/OEM input */ 00789 BYTE b; 00790 WCHAR wc; 00791 00792 wc = (BYTE)*p++; /* Get a byte */ 00793 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */ 00794 b = (BYTE)*p++; /* Get 2nd byte */ 00795 if (!dbc_2nd(b)) return 0xFFFFFFFF; /* Invalid code? */ 00796 wc = (wc << 8) + b; /* Make a DBC */ 00797 } 00798 if (wc != 0) { 00799 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */ 00800 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */ 00801 } 00802 uc = wc; 00803 00804 #endif 00805 *str = p; /* Next read pointer */ 00806 return uc; 00807 } 00808 00809 00810 /* Output a TCHAR string in defined API encoding */ 00811 static 00812 BYTE put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */ 00813 DWORD chr, /* UTF-16 encoded character (Double encoding unit char if >=0x10000) */ 00814 TCHAR* buf, /* Output buffer */ 00815 UINT szb /* Size of the buffer */ 00816 ) 00817 { 00818 #if FF_LFN_UNICODE == 1 /* UTF-16 output */ 00819 WCHAR hs, wc; 00820 00821 hs = (WCHAR)(chr >> 16); 00822 wc = (WCHAR)chr; 00823 if (hs == 0) { /* Single encoding unit? */ 00824 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */ 00825 *buf = wc; 00826 return 1; 00827 } 00828 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */ 00829 *buf++ = hs; 00830 *buf++ = wc; 00831 return 2; 00832 00833 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */ 00834 DWORD hc; 00835 00836 if (chr < 0x80) { /* Single byte code? */ 00837 if (szb < 1) return 0; /* Buffer overflow? */ 00838 *buf = (TCHAR)chr; 00839 return 1; 00840 } 00841 if (chr < 0x800) { /* 2-byte sequence? */ 00842 if (szb < 2) return 0; /* Buffer overflow? */ 00843 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F)); 00844 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 00845 return 2; 00846 } 00847 if (chr < 0x10000) { /* 3-byte sequence? */ 00848 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */ 00849 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F)); 00850 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F)); 00851 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 00852 return 3; 00853 } 00854 /* 4-byte sequence */ 00855 if (szb < 4) return 0; /* Buffer overflow? */ 00856 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */ 00857 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */ 00858 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */ 00859 chr = (hc | chr) + 0x10000; 00860 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07)); 00861 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F)); 00862 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F)); 00863 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F)); 00864 return 4; 00865 00866 #else /* ANSI/OEM output */ 00867 WCHAR wc; 00868 00869 wc = ff_uni2oem(chr, CODEPAGE); 00870 if (wc >= 0x100) { /* Is this a DBC? */ 00871 if (szb < 2) return 0; 00872 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */ 00873 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */ 00874 return 2; 00875 } 00876 if (wc == 0 || szb < 1) return 0; /* Invalid char or buffer overflow? */ 00877 *buf++ = (TCHAR)wc; /* Store the character */ 00878 return 1; 00879 #endif 00880 } 00881 #endif /* FF_USE_LFN */ 00882 00883 00884 #if FF_FS_REENTRANT 00885 /*-----------------------------------------------------------------------*/ 00886 /* Request/Release grant to access the volume */ 00887 /*-----------------------------------------------------------------------*/ 00888 static 00889 int lock_fs ( /* 1:Ok, 0:timeout */ 00890 FATFS* fs /* Filesystem object */ 00891 ) 00892 { 00893 return ff_req_grant(fs->sobj); 00894 } 00895 00896 00897 static 00898 void unlock_fs ( 00899 FATFS* fs, /* Filesystem object */ 00900 FRESULT res /* Result code to be returned */ 00901 ) 00902 { 00903 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) { 00904 ff_rel_grant(fs->sobj); 00905 } 00906 } 00907 00908 #endif 00909 00910 00911 00912 #if FF_FS_LOCK != 0 00913 /*-----------------------------------------------------------------------*/ 00914 /* File lock control functions */ 00915 /*-----------------------------------------------------------------------*/ 00916 00917 static 00918 FRESULT chk_lock ( /* Check if the file can be accessed */ 00919 FATFS_DIR* dp, /* Directory object pointing the file to be checked */ 00920 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */ 00921 ) 00922 { 00923 UINT i, be; 00924 00925 /* Search open object table for the object */ 00926 be = 0; 00927 for (i = 0; i < FF_FS_LOCK; i++) { 00928 if (Files[i].fs) { /* Existing entry */ 00929 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */ 00930 Files[i].clu == dp->obj.sclust && 00931 Files[i].ofs == dp->dptr) break; 00932 } else { /* Blank entry */ 00933 be = 1; 00934 } 00935 } 00936 if (i == FF_FS_LOCK) { /* The object has not been opened */ 00937 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */ 00938 } 00939 00940 /* The object was opened. Reject any open against writing file and all write mode open */ 00941 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK; 00942 } 00943 00944 00945 static 00946 int enq_lock (void) /* Check if an entry is available for a new object */ 00947 { 00948 UINT i; 00949 00950 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; 00951 return (i == FF_FS_LOCK) ? 0 : 1; 00952 } 00953 00954 00955 static 00956 UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */ 00957 FATFS_DIR* dp,/* Directory object pointing the file to register or increment */ 00958 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */ 00959 ) 00960 { 00961 UINT i; 00962 00963 00964 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */ 00965 if (Files[i].fs == dp->obj.fs && 00966 Files[i].clu == dp->obj.sclust && 00967 Files[i].ofs == dp->dptr) break; 00968 } 00969 00970 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */ 00971 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ; 00972 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */ 00973 Files[i].fs = dp->obj.fs; 00974 Files[i].clu = dp->obj.sclust; 00975 Files[i].ofs = dp->dptr; 00976 Files[i].ctr = 0; 00977 } 00978 00979 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */ 00980 00981 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */ 00982 00983 return i + 1; /* Index number origin from 1 */ 00984 } 00985 00986 00987 static 00988 FRESULT dec_lock ( /* Decrement object open counter */ 00989 UINT i /* Semaphore index (1..) */ 00990 ) 00991 { 00992 WORD n; 00993 FRESULT res; 00994 00995 00996 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */ 00997 n = Files[i].ctr; 00998 if (n == 0x100) n = 0; /* If write mode open, delete the entry */ 00999 if (n > 0) n--; /* Decrement read mode open count */ 01000 Files[i].ctr = n; 01001 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */ 01002 res = FR_OK; 01003 } else { 01004 res = FR_INT_ERR; /* Invalid index nunber */ 01005 } 01006 return res; 01007 } 01008 01009 01010 static 01011 void clear_lock ( /* Clear lock entries of the volume */ 01012 FATFS *fs 01013 ) 01014 { 01015 UINT i; 01016 01017 for (i = 0; i < FF_FS_LOCK; i++) { 01018 if (Files[i].fs == fs) Files[i].fs = 0; 01019 } 01020 } 01021 01022 #endif /* FF_FS_LOCK != 0 */ 01023 01024 01025 01026 /*-----------------------------------------------------------------------*/ 01027 /* Move/Flush disk access window in the filesystem object */ 01028 /*-----------------------------------------------------------------------*/ 01029 #if !FF_FS_READONLY 01030 static 01031 FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */ 01032 FATFS* fs /* Filesystem object */ 01033 ) 01034 { 01035 FRESULT res = FR_OK; 01036 01037 01038 if (fs->wflag) { /* Is the disk access window dirty */ 01039 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write back the window */ 01040 fs->wflag = 0; /* Clear window dirty flag */ 01041 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */ 01042 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */ 01043 } 01044 } else { 01045 res = FR_DISK_ERR; 01046 } 01047 } 01048 return res; 01049 } 01050 #endif 01051 01052 01053 static 01054 FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */ 01055 FATFS* fs, /* Filesystem object */ 01056 DWORD sector /* Sector number to make appearance in the fs->win[] */ 01057 ) 01058 { 01059 FRESULT res = FR_OK; 01060 01061 01062 if (sector != fs->winsect) { /* Window offset changed? */ 01063 #if !FF_FS_READONLY 01064 res = sync_window(fs); /* Write-back changes */ 01065 #endif 01066 if (res == FR_OK) { /* Fill sector window with new data */ 01067 if (disk_read(fs->pdrv, fs->win, sector, 1) != RES_OK) { 01068 sector = 0xFFFFFFFF; /* Invalidate window if read data is not valid */ 01069 res = FR_DISK_ERR; 01070 } 01071 fs->winsect = sector; 01072 } 01073 } 01074 return res; 01075 } 01076 01077 01078 01079 01080 #if !FF_FS_READONLY 01081 /*-----------------------------------------------------------------------*/ 01082 /* Synchronize filesystem and data on the storage */ 01083 /*-----------------------------------------------------------------------*/ 01084 01085 static 01086 FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */ 01087 FATFS* fs /* Filesystem object */ 01088 ) 01089 { 01090 FRESULT res; 01091 01092 01093 res = sync_window(fs); 01094 if (res == FR_OK) { 01095 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */ 01096 /* Create FSInfo structure */ 01097 mem_set(fs->win, 0, SS(fs)); 01098 st_word(fs->win + BS_55AA, 0xAA55); 01099 st_dword(fs->win + FSI_LeadSig, 0x41615252); 01100 st_dword(fs->win + FSI_StrucSig, 0x61417272); 01101 st_dword(fs->win + FSI_Free_Count, fs->free_clst); 01102 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); 01103 /* Write it into the FSInfo sector */ 01104 fs->winsect = fs->volbase + 1; 01105 disk_write(fs->pdrv, fs->win, fs->winsect, 1); 01106 fs->fsi_flag = 0; 01107 } 01108 /* Make sure that no pending write process in the lower layer */ 01109 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR; 01110 } 01111 01112 return res; 01113 } 01114 01115 #endif 01116 01117 01118 01119 /*-----------------------------------------------------------------------*/ 01120 /* Get physical sector number from cluster number */ 01121 /*-----------------------------------------------------------------------*/ 01122 01123 static 01124 DWORD clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */ 01125 FATFS* fs, /* Filesystem object */ 01126 DWORD clst /* Cluster# to be converted */ 01127 ) 01128 { 01129 clst -= 2; /* Cluster number is origin from 2 */ 01130 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */ 01131 return fs->database + fs->csize * clst; /* Start sector number of the cluster */ 01132 } 01133 01134 01135 01136 01137 /*-----------------------------------------------------------------------*/ 01138 /* FAT access - Read value of a FAT entry */ 01139 /*-----------------------------------------------------------------------*/ 01140 01141 static 01142 DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */ 01143 FFOBJID* obj, /* Corresponding object */ 01144 DWORD clst /* Cluster number to get the value */ 01145 ) 01146 { 01147 UINT wc, bc; 01148 DWORD val; 01149 FATFS *fs = obj->fs; 01150 01151 01152 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */ 01153 val = 1; /* Internal error */ 01154 01155 } else { 01156 val = 0xFFFFFFFF; /* Default value falls on disk error */ 01157 01158 switch (fs->fs_type) { 01159 case FS_FAT12 : 01160 bc = (UINT)clst; bc += bc / 2; 01161 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 01162 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */ 01163 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break; 01164 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */ 01165 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */ 01166 break; 01167 01168 case FS_FAT16 : 01169 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break; 01170 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */ 01171 break; 01172 01173 case FS_FAT32 : 01174 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 01175 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */ 01176 break; 01177 #if FF_FS_EXFAT 01178 case FS_EXFAT : 01179 if (obj->objsize != 0) { 01180 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */ 01181 DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */ 01182 01183 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */ 01184 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */ 01185 break; 01186 } 01187 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */ 01188 val = clst + 1; /* Generate the value */ 01189 break; 01190 } 01191 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */ 01192 if (obj->n_frag != 0) { /* Is it on the growing edge? */ 01193 val = 0x7FFFFFFF; /* Generate EOC */ 01194 } else { 01195 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break; 01196 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF; 01197 } 01198 break; 01199 } 01200 } 01201 /* go to default */ 01202 #endif 01203 default: 01204 val = 1; /* Internal error */ 01205 } 01206 } 01207 01208 return val; 01209 } 01210 01211 01212 01213 01214 #if !FF_FS_READONLY 01215 /*-----------------------------------------------------------------------*/ 01216 /* FAT access - Change value of a FAT entry */ 01217 /*-----------------------------------------------------------------------*/ 01218 01219 static 01220 FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */ 01221 FATFS* fs, /* Corresponding filesystem object */ 01222 DWORD clst, /* FAT index number (cluster number) to be changed */ 01223 DWORD val /* New value to be set to the entry */ 01224 ) 01225 { 01226 UINT bc; 01227 BYTE *p; 01228 FRESULT res = FR_INT_ERR; 01229 01230 01231 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */ 01232 switch (fs->fs_type) { 01233 case FS_FAT12 : 01234 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */ 01235 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 01236 if (res != FR_OK) break; 01237 p = fs->win + bc++ % SS(fs); 01238 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Put 1st byte */ 01239 fs->wflag = 1; 01240 res = move_window(fs, fs->fatbase + (bc / SS(fs))); 01241 if (res != FR_OK) break; 01242 p = fs->win + bc % SS(fs); 01243 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Put 2nd byte */ 01244 fs->wflag = 1; 01245 break; 01246 01247 case FS_FAT16 : 01248 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))); 01249 if (res != FR_OK) break; 01250 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */ 01251 fs->wflag = 1; 01252 break; 01253 01254 case FS_FAT32 : 01255 #if FF_FS_EXFAT 01256 case FS_EXFAT : 01257 #endif 01258 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))); 01259 if (res != FR_OK) break; 01260 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { 01261 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000); 01262 } 01263 st_dword(fs->win + clst * 4 % SS(fs), val); 01264 fs->wflag = 1; 01265 break; 01266 } 01267 } 01268 return res; 01269 } 01270 01271 #endif /* !FF_FS_READONLY */ 01272 01273 01274 01275 01276 #if FF_FS_EXFAT && !FF_FS_READONLY 01277 /*-----------------------------------------------------------------------*/ 01278 /* exFAT: Accessing FAT and Allocation Bitmap */ 01279 /*-----------------------------------------------------------------------*/ 01280 01281 /*--------------------------------------*/ 01282 /* Find a contiguous free cluster block */ 01283 /*--------------------------------------*/ 01284 01285 static 01286 DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */ 01287 FATFS* fs, /* Filesystem object */ 01288 DWORD clst, /* Cluster number to scan from */ 01289 DWORD ncl /* Number of contiguous clusters to find (1..) */ 01290 ) 01291 { 01292 BYTE bm, bv; 01293 UINT i; 01294 DWORD val, scl, ctr; 01295 01296 01297 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */ 01298 if (clst >= fs->n_fatent - 2) clst = 0; 01299 scl = val = clst; ctr = 0; 01300 for (;;) { 01301 if (move_window(fs, fs->database + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF; /* (assuming bitmap is located top of the cluster heap) */ 01302 i = val / 8 % SS(fs); bm = 1 << (val % 8); 01303 do { 01304 do { 01305 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */ 01306 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */ 01307 val = 0; bm = 0; i = SS(fs); 01308 } 01309 if (bv == 0) { /* Is it a free cluster? */ 01310 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */ 01311 } else { 01312 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */ 01313 } 01314 if (val == clst) return 0; /* All cluster scanned? */ 01315 } while (bm != 0); 01316 bm = 1; 01317 } while (++i < SS(fs)); 01318 } 01319 } 01320 01321 01322 /*----------------------------------------*/ 01323 /* Set/Clear a block of allocation bitmap */ 01324 /*----------------------------------------*/ 01325 01326 static 01327 FRESULT change_bitmap ( 01328 FATFS* fs, /* Filesystem object */ 01329 DWORD clst, /* Cluster number to change from */ 01330 DWORD ncl, /* Number of clusters to be changed */ 01331 int bv /* bit value to be set (0 or 1) */ 01332 ) 01333 { 01334 BYTE bm; 01335 UINT i; 01336 DWORD sect; 01337 01338 01339 clst -= 2; /* The first bit corresponds to cluster #2 */ 01340 sect = fs->database + clst / 8 / SS(fs); /* Sector address (assuming bitmap is located top of the cluster heap) */ 01341 i = clst / 8 % SS(fs); /* Byte offset in the sector */ 01342 bm = 1 << (clst % 8); /* Bit mask in the byte */ 01343 for (;;) { 01344 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR; 01345 do { 01346 do { 01347 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */ 01348 fs->win[i] ^= bm; /* Flip the bit */ 01349 fs->wflag = 1; 01350 if (--ncl == 0) return FR_OK; /* All bits processed? */ 01351 } while (bm <<= 1); /* Next bit */ 01352 bm = 1; 01353 } while (++i < SS(fs)); /* Next byte */ 01354 i = 0; 01355 } 01356 } 01357 01358 01359 /*---------------------------------------------*/ 01360 /* Fill the first fragment of the FAT chain */ 01361 /*---------------------------------------------*/ 01362 01363 static 01364 FRESULT fill_first_frag ( 01365 FFOBJID* obj /* Pointer to the corresponding object */ 01366 ) 01367 { 01368 FRESULT res; 01369 DWORD cl, n; 01370 01371 01372 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */ 01373 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */ 01374 res = put_fat(obj->fs, cl, cl + 1); 01375 if (res != FR_OK) return res; 01376 } 01377 obj->stat = 0; /* Change status 'FAT chain is valid' */ 01378 } 01379 return FR_OK; 01380 } 01381 01382 01383 /*---------------------------------------------*/ 01384 /* Fill the last fragment of the FAT chain */ 01385 /*---------------------------------------------*/ 01386 01387 static 01388 FRESULT fill_last_frag ( 01389 FFOBJID* obj, /* Pointer to the corresponding object */ 01390 DWORD lcl, /* Last cluster of the fragment */ 01391 DWORD term /* Value to set the last FAT entry */ 01392 ) 01393 { 01394 FRESULT res; 01395 01396 01397 while (obj->n_frag > 0) { /* Create the chain of last fragment */ 01398 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term); 01399 if (res != FR_OK) return res; 01400 obj->n_frag--; 01401 } 01402 return FR_OK; 01403 } 01404 01405 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */ 01406 01407 01408 01409 #if !FF_FS_READONLY 01410 /*-----------------------------------------------------------------------*/ 01411 /* FAT handling - Remove a cluster chain */ 01412 /*-----------------------------------------------------------------------*/ 01413 static 01414 FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */ 01415 FFOBJID* obj, /* Corresponding object */ 01416 DWORD clst, /* Cluster to remove a chain from */ 01417 DWORD pclst /* Previous cluster of clst (0:entire chain) */ 01418 ) 01419 { 01420 FRESULT res = FR_OK; 01421 DWORD nxt; 01422 FATFS *fs = obj->fs; 01423 #if FF_FS_EXFAT || FF_USE_TRIM 01424 DWORD scl = clst, ecl = clst; 01425 #endif 01426 #if FF_USE_TRIM 01427 DWORD rt[2]; 01428 #endif 01429 01430 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */ 01431 01432 /* Mark the previous cluster 'EOC' on the FAT if it exists */ 01433 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) { 01434 res = put_fat(fs, pclst, 0xFFFFFFFF); 01435 if (res != FR_OK) return res; 01436 } 01437 01438 /* Remove the chain */ 01439 do { 01440 nxt = get_fat(obj, clst); /* Get cluster status */ 01441 if (nxt == 0) break; /* Empty cluster? */ 01442 if (nxt == 1) return FR_INT_ERR; /* Internal error? */ 01443 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */ 01444 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { 01445 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */ 01446 if (res != FR_OK) return res; 01447 } 01448 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */ 01449 fs->free_clst++; 01450 fs->fsi_flag |= 1; 01451 } 01452 #if FF_FS_EXFAT || FF_USE_TRIM 01453 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */ 01454 ecl = nxt; 01455 } else { /* End of contiguous cluster block */ 01456 #if FF_FS_EXFAT 01457 if (fs->fs_type == FS_EXFAT) { 01458 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */ 01459 if (res != FR_OK) return res; 01460 } 01461 #endif 01462 #if FF_USE_TRIM 01463 rt[0] = clst2sect(fs, scl); /* Start of data area freed */ 01464 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area freed */ 01465 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform device the data in the block is no longer needed */ 01466 #endif 01467 scl = ecl = nxt; 01468 } 01469 #endif 01470 clst = nxt; /* Next cluster */ 01471 } while (clst < fs->n_fatent); /* Repeat while not the last link */ 01472 01473 #if FF_FS_EXFAT 01474 /* Some post processes for chain status */ 01475 if (fs->fs_type == FS_EXFAT) { 01476 if (pclst == 0) { /* Has the entire chain been removed? */ 01477 obj->stat = 0; /* Change the chain status 'initial' */ 01478 } else { 01479 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */ 01480 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */ 01481 while (clst != pclst) { 01482 nxt = get_fat(obj, clst); 01483 if (nxt < 2) return FR_INT_ERR; 01484 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; 01485 if (nxt != clst + 1) break; /* Not contiguous? */ 01486 clst++; 01487 } 01488 if (clst == pclst) { /* Has the chain got contiguous again? */ 01489 obj->stat = 2; /* Change the chain status 'contiguous' */ 01490 } 01491 } else { 01492 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */ 01493 obj->stat = 2; /* Change the chain status 'contiguous' */ 01494 } 01495 } 01496 } 01497 } 01498 #endif 01499 return FR_OK; 01500 } 01501 01502 01503 01504 01505 /*-----------------------------------------------------------------------*/ 01506 /* FAT handling - Stretch a chain or Create a new chain */ 01507 /*-----------------------------------------------------------------------*/ 01508 static 01509 DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */ 01510 FFOBJID* obj, /* Corresponding object */ 01511 DWORD clst /* Cluster# to stretch, 0:Create a new chain */ 01512 ) 01513 { 01514 DWORD cs, ncl, scl; 01515 FRESULT res; 01516 FATFS *fs = obj->fs; 01517 01518 01519 if (clst == 0) { /* Create a new chain */ 01520 scl = fs->last_clst; /* Suggested cluster to start to find */ 01521 if (scl == 0 || scl >= fs->n_fatent) scl = 1; 01522 } 01523 else { /* Stretch a chain */ 01524 cs = get_fat(obj, clst); /* Check the cluster status */ 01525 if (cs < 2) return 1; /* Test for insanity */ 01526 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */ 01527 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */ 01528 scl = clst; /* Cluster to start to find */ 01529 } 01530 if (fs->free_clst == 0) return 0; /* No free cluster */ 01531 01532 #if FF_FS_EXFAT 01533 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 01534 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */ 01535 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */ 01536 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */ 01537 if (res == FR_INT_ERR) return 1; 01538 if (res == FR_DISK_ERR) return 0xFFFFFFFF; 01539 if (clst == 0) { /* Is it a new chain? */ 01540 obj->stat = 2; /* Set status 'contiguous' */ 01541 } else { /* It is a stretched chain */ 01542 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */ 01543 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */ 01544 obj->stat = 3; /* Change status 'just fragmented' */ 01545 } 01546 } 01547 if (obj->stat != 2) { /* Is the file non-contiguous? */ 01548 if (ncl == clst + 1) { /* Is the cluster next to previous one? */ 01549 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */ 01550 } else { /* New fragment */ 01551 if (obj->n_frag == 0) obj->n_frag = 1; 01552 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */ 01553 if (res == FR_OK) obj->n_frag = 1; 01554 } 01555 } 01556 } else 01557 #endif 01558 { /* On the FAT/FAT32 volume */ 01559 ncl = 0; 01560 if (scl == clst) { /* Stretching an existing chain? */ 01561 ncl = scl + 1; /* Test if next cluster is free */ 01562 if (ncl >= fs->n_fatent) ncl = 2; 01563 cs = get_fat(obj, ncl); /* Get next cluster status */ 01564 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */ 01565 if (cs != 0) { /* Not free? */ 01566 cs = fs->last_clst; /* Start at suggested cluster if it is valid */ 01567 if (cs >= 2 && cs < fs->n_fatent) scl = cs; 01568 ncl = 0; 01569 } 01570 } 01571 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */ 01572 ncl = scl; /* Start cluster */ 01573 for (;;) { 01574 ncl++; /* Next cluster */ 01575 if (ncl >= fs->n_fatent) { /* Check wrap-around */ 01576 ncl = 2; 01577 if (ncl > scl) return 0; /* No free cluster found? */ 01578 } 01579 cs = get_fat(obj, ncl); /* Get the cluster status */ 01580 if (cs == 0) break; /* Found a free cluster? */ 01581 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */ 01582 if (ncl == scl) return 0; /* No free cluster found? */ 01583 } 01584 } 01585 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */ 01586 if (res == FR_OK && clst != 0) { 01587 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */ 01588 } 01589 } 01590 01591 if (res == FR_OK) { /* Update FSINFO if function succeeded. */ 01592 fs->last_clst = ncl; 01593 if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--; 01594 fs->fsi_flag |= 1; 01595 } else { 01596 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */ 01597 } 01598 01599 return ncl; /* Return new cluster number or error status */ 01600 } 01601 01602 #endif /* !FF_FS_READONLY */ 01603 01604 01605 01606 01607 #if FF_USE_FASTSEEK 01608 /*-----------------------------------------------------------------------*/ 01609 /* FAT handling - Convert offset into cluster with link map table */ 01610 /*-----------------------------------------------------------------------*/ 01611 01612 static 01613 DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */ 01614 FIL* fp, /* Pointer to the file object */ 01615 FSIZE_t ofs /* File offset to be converted to cluster# */ 01616 ) 01617 { 01618 DWORD cl, ncl, *tbl; 01619 FATFS *fs = fp->obj.fs; 01620 01621 01622 tbl = fp->cltbl + 1; /* Top of CLMT */ 01623 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */ 01624 for (;;) { 01625 ncl = *tbl++; /* Number of cluters in the fragment */ 01626 if (ncl == 0) return 0; /* End of table? (error) */ 01627 if (cl < ncl) break; /* In this fragment? */ 01628 cl -= ncl; tbl++; /* Next fragment */ 01629 } 01630 return cl + *tbl; /* Return the cluster number */ 01631 } 01632 01633 #endif /* FF_USE_FASTSEEK */ 01634 01635 01636 01637 01638 /*-----------------------------------------------------------------------*/ 01639 /* Directory handling - Fill a cluster with zeros */ 01640 /*-----------------------------------------------------------------------*/ 01641 01642 #if !FF_FS_READONLY 01643 static 01644 FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */ 01645 FATFS *fs, /* Filesystem object */ 01646 DWORD clst /* Directory table to clear */ 01647 ) 01648 { 01649 DWORD sect; 01650 UINT n, szb; 01651 BYTE *ibuf; 01652 01653 01654 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */ 01655 sect = clst2sect(fs, clst); /* Top of the cluster */ 01656 fs->winsect = sect; /* Set window to top of the cluster */ 01657 mem_set(fs->win, 0, SS(fs)); /* Clear window buffer */ 01658 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */ 01659 /* Allocate a temporary buffer */ 01660 for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs); szb > SS(fs) && !(ibuf = (BYTE *)ff_memalloc(szb)); szb /= 2) ; 01661 if (szb > SS(fs)) { /* Buffer allocated? */ 01662 mem_set(ibuf, 0, szb); 01663 szb /= SS(fs); /* Bytes -> Sectors */ 01664 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */ 01665 ff_memfree(ibuf); 01666 } else 01667 #endif 01668 { 01669 ibuf = fs->win; szb = 1; /* Use window buffer (single-sector writes may take a time) */ 01670 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */ 01671 } 01672 return (n == fs->csize) ? FR_OK : FR_DISK_ERR; 01673 } 01674 #endif /* !FF_FS_READONLY */ 01675 01676 01677 01678 01679 /*-----------------------------------------------------------------------*/ 01680 /* Directory handling - Set directory index */ 01681 /*-----------------------------------------------------------------------*/ 01682 01683 static 01684 FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */ 01685 FATFS_DIR* dp, /* Pointer to directory object */ 01686 DWORD ofs /* Offset of directory table */ 01687 ) 01688 { 01689 DWORD csz, clst; 01690 FATFS *fs = dp->obj.fs; 01691 01692 01693 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */ 01694 return FR_INT_ERR; 01695 } 01696 dp->dptr = ofs; /* Set current offset */ 01697 clst = dp->obj.sclust; /* Table start cluster (0:root) */ 01698 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */ 01699 clst = fs->dirbase; 01700 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */ 01701 } 01702 01703 if (clst == 0) { /* Static table (root-directory on the FAT volume) */ 01704 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */ 01705 dp->sect = fs->dirbase; 01706 01707 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */ 01708 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */ 01709 while (ofs >= csz) { /* Follow cluster chain */ 01710 clst = get_fat(&dp->obj, clst); /* Get next cluster */ 01711 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01712 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */ 01713 ofs -= csz; 01714 } 01715 dp->sect = clst2sect(fs, clst); 01716 } 01717 dp->clust = clst; /* Current cluster# */ 01718 if (dp->sect == 0) return FR_INT_ERR; 01719 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */ 01720 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */ 01721 01722 return FR_OK; 01723 } 01724 01725 01726 01727 01728 /*-----------------------------------------------------------------------*/ 01729 /* Directory handling - Move directory table index next */ 01730 /*-----------------------------------------------------------------------*/ 01731 01732 static 01733 FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */ 01734 FATFS_DIR* dp, /* Pointer to the directory object */ 01735 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */ 01736 ) 01737 { 01738 DWORD ofs, clst; 01739 FATFS *fs = dp->obj.fs; 01740 01741 01742 ofs = dp->dptr + SZDIRE; /* Next entry */ 01743 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 */ 01744 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */ 01745 01746 if (ofs % SS(fs) == 0) { /* Sector changed? */ 01747 dp->sect++; /* Next sector */ 01748 01749 if (dp->clust == 0) { /* Static table */ 01750 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */ 01751 dp->sect = 0; return FR_NO_FILE; 01752 } 01753 } 01754 else { /* Dynamic table */ 01755 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */ 01756 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */ 01757 if (clst <= 1) return FR_INT_ERR; /* Internal error */ 01758 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01759 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */ 01760 #if !FF_FS_READONLY 01761 if (!stretch) { /* If no stretch, report EOT */ 01762 dp->sect = 0; return FR_NO_FILE; 01763 } 01764 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */ 01765 if (clst == 0) return FR_DENIED; /* No free cluster */ 01766 if (clst == 1) return FR_INT_ERR; /* Internal error */ 01767 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01768 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */ 01769 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */ 01770 #else 01771 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */ 01772 dp->sect = 0; return FR_NO_FILE; /* Report EOT */ 01773 #endif 01774 } 01775 dp->clust = clst; /* Initialize data for new cluster */ 01776 dp->sect = clst2sect(fs, clst); 01777 } 01778 } 01779 } 01780 dp->dptr = ofs; /* Current entry */ 01781 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */ 01782 01783 return FR_OK; 01784 } 01785 01786 01787 01788 01789 #if !FF_FS_READONLY 01790 /*-----------------------------------------------------------------------*/ 01791 /* Directory handling - Reserve a block of directory entries */ 01792 /*-----------------------------------------------------------------------*/ 01793 01794 static 01795 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 01796 FATFS_DIR* dp, /* Pointer to the directory object */ 01797 UINT nent /* Number of contiguous entries to allocate */ 01798 ) 01799 { 01800 FRESULT res; 01801 UINT n; 01802 FATFS *fs = dp->obj.fs; 01803 01804 01805 res = dir_sdi(dp, 0); 01806 if (res == FR_OK) { 01807 n = 0; 01808 do { 01809 res = move_window(fs, dp->sect); 01810 if (res != FR_OK) break; 01811 #if FF_FS_EXFAT 01812 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { 01813 #else 01814 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { 01815 #endif 01816 if (++n == nent) break; /* A block of contiguous free entries is found */ 01817 } else { 01818 n = 0; /* Not a blank entry. Restart to search */ 01819 } 01820 res = dir_next(dp, 1); 01821 } while (res == FR_OK); /* Next entry with table stretch enabled */ 01822 } 01823 01824 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 01825 return res; 01826 } 01827 01828 #endif /* !FF_FS_READONLY */ 01829 01830 01831 01832 01833 /*-----------------------------------------------------------------------*/ 01834 /* FAT: Directory handling - Load/Store start cluster number */ 01835 /*-----------------------------------------------------------------------*/ 01836 01837 static 01838 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 01839 FATFS* fs, /* Pointer to the fs object */ 01840 const BYTE* dir /* Pointer to the key entry */ 01841 ) 01842 { 01843 DWORD cl; 01844 01845 cl = ld_word(dir + DIR_FstClusLO); 01846 if (fs->fs_type == FS_FAT32) { 01847 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16; 01848 } 01849 01850 return cl; 01851 } 01852 01853 01854 #if !FF_FS_READONLY 01855 static 01856 void st_clust ( 01857 FATFS* fs, /* Pointer to the fs object */ 01858 BYTE* dir, /* Pointer to the key entry */ 01859 DWORD cl /* Value to be set */ 01860 ) 01861 { 01862 st_word(dir + DIR_FstClusLO, (WORD)cl); 01863 if (fs->fs_type == FS_FAT32) { 01864 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16)); 01865 } 01866 } 01867 #endif 01868 01869 01870 01871 #if FF_USE_LFN 01872 /*--------------------------------------------------------*/ 01873 /* FAT-LFN: Compare a part of file name with an LFN entry */ 01874 /*--------------------------------------------------------*/ 01875 static 01876 int cmp_lfn ( /* 1:matched, 0:not matched */ 01877 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 01878 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 01879 ) 01880 { 01881 UINT i, s; 01882 WCHAR wc, uc; 01883 01884 01885 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 01886 01887 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01888 01889 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01890 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 01891 if (wc != 0) { 01892 if (i >= FF_MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */ 01893 return 0; /* Not matched */ 01894 } 01895 wc = uc; 01896 } else { 01897 if (uc != 0xFFFF) return 0; /* Check filler */ 01898 } 01899 } 01900 01901 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */ 01902 01903 return 1; /* The part of LFN matched */ 01904 } 01905 01906 01907 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 01908 /*-----------------------------------------------------*/ 01909 /* FAT-LFN: Pick a part of file name from an LFN entry */ 01910 /*-----------------------------------------------------*/ 01911 static 01912 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 01913 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 01914 BYTE* dir /* Pointer to the LFN entry */ 01915 ) 01916 { 01917 UINT i, s; 01918 WCHAR wc, uc; 01919 01920 01921 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */ 01922 01923 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */ 01924 01925 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01926 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 01927 if (wc != 0) { 01928 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */ 01929 lfnbuf[i++] = wc = uc; /* Store it */ 01930 } else { 01931 if (uc != 0xFFFF) return 0; /* Check filler */ 01932 } 01933 } 01934 01935 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ 01936 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */ 01937 lfnbuf[i] = 0; 01938 } 01939 01940 return 1; /* The part of LFN is valid */ 01941 } 01942 #endif 01943 01944 01945 #if !FF_FS_READONLY 01946 /*-----------------------------------------*/ 01947 /* FAT-LFN: Create an entry of LFN entries */ 01948 /*-----------------------------------------*/ 01949 static 01950 void put_lfn ( 01951 const WCHAR* lfn, /* Pointer to the LFN */ 01952 BYTE* dir, /* Pointer to the LFN entry to be created */ 01953 BYTE ord, /* LFN order (1-20) */ 01954 BYTE sum /* Checksum of the corresponding SFN */ 01955 ) 01956 { 01957 UINT i, s; 01958 WCHAR wc; 01959 01960 01961 dir[LDIR_Chksum] = sum; /* Set checksum */ 01962 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01963 dir[LDIR_Type] = 0; 01964 st_word(dir + LDIR_FstClusLO, 0); 01965 01966 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 01967 s = wc = 0; 01968 do { 01969 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */ 01970 st_word(dir + LfnOfs[s], wc); /* Put it */ 01971 if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */ 01972 } while (++s < 13); 01973 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */ 01974 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01975 } 01976 01977 #endif /* !FF_FS_READONLY */ 01978 #endif /* FF_USE_LFN */ 01979 01980 01981 01982 #if FF_USE_LFN && !FF_FS_READONLY 01983 /*-----------------------------------------------------------------------*/ 01984 /* FAT-LFN: Create a Numbered SFN */ 01985 /*-----------------------------------------------------------------------*/ 01986 01987 static 01988 void gen_numname ( 01989 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 01990 const BYTE* src, /* Pointer to SFN */ 01991 const WCHAR* lfn, /* Pointer to LFN */ 01992 UINT seq /* Sequence number */ 01993 ) 01994 { 01995 BYTE ns[8], c; 01996 UINT i, j; 01997 WCHAR wc; 01998 DWORD sr; 01999 02000 02001 mem_cpy(dst, src, 11); 02002 02003 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */ 02004 sr = seq; 02005 while (*lfn) { /* Create a CRC */ 02006 wc = *lfn++; 02007 for (i = 0; i < 16; i++) { 02008 sr = (sr << 1) + (wc & 1); 02009 wc >>= 1; 02010 if (sr & 0x10000) sr ^= 0x11021; 02011 } 02012 } 02013 seq = (UINT)sr; 02014 } 02015 02016 /* itoa (hexdecimal) */ 02017 i = 7; 02018 do { 02019 c = (BYTE)((seq % 16) + '0'); 02020 if (c > '9') c += 7; 02021 ns[i--] = c; 02022 seq /= 16; 02023 } while (seq); 02024 ns[i] = '~'; 02025 02026 /* Append the number to the SFN body */ 02027 for (j = 0; j < i && dst[j] != ' '; j++) { 02028 if (dbc_1st(dst[j])) { 02029 if (j == i - 1) break; 02030 j++; 02031 } 02032 } 02033 do { 02034 dst[j++] = (i < 8) ? ns[i++] : ' '; 02035 } while (j < 8); 02036 } 02037 #endif /* FF_USE_LFN && !FF_FS_READONLY */ 02038 02039 02040 02041 #if FF_USE_LFN 02042 /*-----------------------------------------------------------------------*/ 02043 /* FAT-LFN: Calculate checksum of an SFN entry */ 02044 /*-----------------------------------------------------------------------*/ 02045 02046 static 02047 BYTE sum_sfn ( 02048 const BYTE* dir /* Pointer to the SFN entry */ 02049 ) 02050 { 02051 BYTE sum = 0; 02052 UINT n = 11; 02053 02054 do { 02055 sum = (sum >> 1) + (sum << 7) + *dir++; 02056 } while (--n); 02057 return sum; 02058 } 02059 02060 #endif /* FF_USE_LFN */ 02061 02062 02063 02064 #if FF_FS_EXFAT 02065 /*-----------------------------------------------------------------------*/ 02066 /* exFAT: Checksum */ 02067 /*-----------------------------------------------------------------------*/ 02068 02069 static 02070 WORD xdir_sum ( /* Get checksum of the directoly entry block */ 02071 const BYTE* dir /* Directory entry block to be calculated */ 02072 ) 02073 { 02074 UINT i, szblk; 02075 WORD sum; 02076 02077 02078 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; 02079 for (i = sum = 0; i < szblk; i++) { 02080 if (i == XDIR_SetSum) { /* Skip sum field */ 02081 i++; 02082 } else { 02083 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i]; 02084 } 02085 } 02086 return sum; 02087 } 02088 02089 02090 02091 static 02092 WORD xname_sum ( /* Get check sum (to be used as hash) of the name */ 02093 const WCHAR* name /* File name to be calculated */ 02094 ) 02095 { 02096 WCHAR chr; 02097 WORD sum = 0; 02098 02099 02100 while ((chr = *name++) != 0) { 02101 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be upper-case converted */ 02102 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF); 02103 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8); 02104 } 02105 return sum; 02106 } 02107 02108 02109 #if !FF_FS_READONLY && FF_USE_MKFS 02110 static 02111 DWORD xsum32 ( 02112 BYTE dat, /* Byte to be calculated */ 02113 DWORD sum /* Previous sum */ 02114 ) 02115 { 02116 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat; 02117 return sum; 02118 } 02119 #endif 02120 02121 02122 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 02123 /*------------------------------------------------------*/ 02124 /* exFAT: Get object information from a directory block */ 02125 /*------------------------------------------------------*/ 02126 02127 static 02128 void get_xfileinfo ( 02129 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */ 02130 FILINFO* fno /* Buffer to store the extracted file information */ 02131 ) 02132 { 02133 WCHAR wc, hs; 02134 UINT di, si, nc; 02135 02136 /* Get file name from the entry block */ 02137 si = SZDIRE * 2; /* 1st C1 entry */ 02138 nc = hs = di = 0; 02139 while (nc < dirb[XDIR_NumName]) { 02140 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */ 02141 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ 02142 wc = ld_word(dirb + si); si += 2; nc++; /* Get a character */ 02143 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 02144 hs = wc; continue; /* Get low surrogate */ 02145 } 02146 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */ 02147 if (wc == 0) { di = 0; break; } /* Buffer overflow or wrong encoding? */ 02148 di += wc; 02149 hs = 0; 02150 } 02151 if (hs != 0) di = 0; /* Broken surrogate pair? */ 02152 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */ 02153 fno->fname[di] = 0; /* Terminate the name */ 02154 fno->altname[0] = 0; /* exFAT does not have SFN */ 02155 02156 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */ 02157 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */ 02158 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */ 02159 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */ 02160 } 02161 02162 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 02163 02164 02165 /*-----------------------------------*/ 02166 /* exFAT: Get a directry entry block */ 02167 /*-----------------------------------*/ 02168 02169 static 02170 FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */ 02171 FATFS_DIR* dp /* Reading direcotry object pointing top of the entry block to load */ 02172 ) 02173 { 02174 FRESULT res; 02175 UINT i, sz_ent; 02176 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */ 02177 02178 02179 /* Load 85 entry */ 02180 res = move_window(dp->obj.fs, dp->sect); 02181 if (res != FR_OK) return res; 02182 if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR; /* Invalid order */ 02183 mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE); 02184 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE; 02185 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR; 02186 02187 /* Load C0 entry */ 02188 res = dir_next(dp, 0); 02189 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 02190 if (res != FR_OK) return res; 02191 res = move_window(dp->obj.fs, dp->sect); 02192 if (res != FR_OK) return res; 02193 if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR; /* Invalid order */ 02194 mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE); 02195 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR; 02196 02197 /* Load C1 entries */ 02198 i = 2 * SZDIRE; /* C1 offset to load */ 02199 do { 02200 res = dir_next(dp, 0); 02201 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 02202 if (res != FR_OK) return res; 02203 res = move_window(dp->obj.fs, dp->sect); 02204 if (res != FR_OK) return res; 02205 if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR; /* Invalid order */ 02206 if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE); 02207 } while ((i += SZDIRE) < sz_ent); 02208 02209 /* Sanity check (do it for only accessible object) */ 02210 if (i <= MAXDIRB(FF_MAX_LFN)) { 02211 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR; 02212 } 02213 return FR_OK; 02214 } 02215 02216 02217 /*------------------------------------------------------------------*/ 02218 /* exFAT: Initialize object allocation info with loaded entry block */ 02219 /*------------------------------------------------------------------*/ 02220 02221 static 02222 void init_alloc_info ( 02223 FATFS* fs, /* Filesystem object */ 02224 FFOBJID* obj /* Object allocation information to be initialized */ 02225 ) 02226 { 02227 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */ 02228 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */ 02229 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */ 02230 obj->n_frag = 0; /* No last fragment info */ 02231 } 02232 02233 02234 02235 #if !FF_FS_READONLY || FF_FS_RPATH != 0 02236 /*------------------------------------------------*/ 02237 /* exFAT: Load the object's directory entry block */ 02238 /*------------------------------------------------*/ 02239 static 02240 FRESULT load_obj_xdir ( 02241 FATFS_DIR* dp, /* Blank directory object to be used to access containing direcotry */ 02242 const FFOBJID* obj /* Object with its containing directory information */ 02243 ) 02244 { 02245 FRESULT res; 02246 02247 /* Open object containing directory */ 02248 dp->obj.fs = obj->fs; 02249 dp->obj.sclust = obj->c_scl; 02250 dp->obj.stat = (BYTE)obj->c_size; 02251 dp->obj.objsize = obj->c_size & 0xFFFFFF00; 02252 dp->obj.n_frag = 0; 02253 dp->blk_ofs = obj->c_ofs; 02254 02255 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */ 02256 if (res == FR_OK) { 02257 res = load_xdir(dp); /* Load the object's entry block */ 02258 } 02259 return res; 02260 } 02261 #endif 02262 02263 02264 #if !FF_FS_READONLY 02265 /*----------------------------------------*/ 02266 /* exFAT: Store the directory entry block */ 02267 /*----------------------------------------*/ 02268 static 02269 FRESULT store_xdir ( 02270 FATFS_DIR* dp /* Pointer to the direcotry object */ 02271 ) 02272 { 02273 FRESULT res; 02274 UINT nent; 02275 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */ 02276 02277 /* Create set sum */ 02278 st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); 02279 nent = dirb[XDIR_NumSec] + 1; 02280 02281 /* Store the direcotry entry block to the directory */ 02282 res = dir_sdi(dp, dp->blk_ofs); 02283 while (res == FR_OK) { 02284 res = move_window(dp->obj.fs, dp->sect); 02285 if (res != FR_OK) break; 02286 mem_cpy(dp->dir, dirb, SZDIRE); 02287 dp->obj.fs->wflag = 1; 02288 if (--nent == 0) break; 02289 dirb += SZDIRE; 02290 res = dir_next(dp, 0); 02291 } 02292 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR; 02293 } 02294 02295 02296 02297 /*-------------------------------------------*/ 02298 /* exFAT: Create a new directory enrty block */ 02299 /*-------------------------------------------*/ 02300 02301 static 02302 void create_xdir ( 02303 BYTE* dirb, /* Pointer to the direcotry entry block buffer */ 02304 const WCHAR* lfn /* Pointer to the object name */ 02305 ) 02306 { 02307 UINT i; 02308 BYTE nc1, nlen; 02309 WCHAR wc; 02310 02311 02312 /* Create 85,C0 entry */ 02313 mem_set(dirb, 0, 2 * SZDIRE); 02314 dirb[0 * SZDIRE + XDIR_Type] = 0x85; /* 85 entry */ 02315 dirb[1 * SZDIRE + XDIR_Type] = 0xC0; /* C0 entry */ 02316 02317 /* Create C1 entries */ 02318 i = SZDIRE * 2; /* Top of C1 entries */ 02319 nlen = nc1 = 0; wc = 1; 02320 do { 02321 dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */ 02322 do { /* Fill name field */ 02323 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */ 02324 st_word(dirb + i, wc); /* Store it */ 02325 i += 2; 02326 } while (i % SZDIRE != 0); 02327 nc1++; 02328 } while (lfn[nlen]); /* Fill next entry if any char follows */ 02329 02330 dirb[XDIR_NumName] = nlen; /* Set name length */ 02331 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */ 02332 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */ 02333 } 02334 02335 #endif /* !FF_FS_READONLY */ 02336 #endif /* FF_FS_EXFAT */ 02337 02338 02339 02340 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 02341 /*-----------------------------------------------------------------------*/ 02342 /* Read an object from the directory */ 02343 /*-----------------------------------------------------------------------*/ 02344 02345 #define dir_read_file(dp) dir_read(dp, 0) 02346 #define dir_read_label(dp) dir_read(dp, 1) 02347 02348 static 02349 FRESULT dir_read ( 02350 FATFS_DIR* dp, /* Pointer to the directory object */ 02351 int vol /* Filtered by 0:file/directory or 1:volume label */ 02352 ) 02353 { 02354 FRESULT res = FR_NO_FILE; 02355 FATFS *fs = dp->obj.fs; 02356 BYTE a, c; 02357 #if FF_USE_LFN 02358 BYTE ord = 0xFF, sum = 0xFF; 02359 #endif 02360 02361 while (dp->sect) { 02362 res = move_window(fs, dp->sect); 02363 if (res != FR_OK) break; 02364 c = dp->dir[DIR_Name]; /* Test for the entry type */ 02365 if (c == 0) { 02366 res = FR_NO_FILE; break; /* Reached to end of the directory */ 02367 } 02368 #if FF_FS_EXFAT 02369 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02370 if (FF_USE_LABEL && vol) { 02371 if (c == 0x83) break; /* Volume label entry? */ 02372 } else { 02373 if (c == 0x85) { /* Start of the file entry block? */ 02374 dp->blk_ofs = dp->dptr; /* Get location of the block */ 02375 res = load_xdir(dp); /* Load the entry block */ 02376 if (res == FR_OK) { 02377 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */ 02378 } 02379 break; 02380 } 02381 } 02382 } else 02383 #endif 02384 { /* On the FAT/FAT32 volume */ 02385 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */ 02386 #if FF_USE_LFN /* LFN configuration */ 02387 if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 02388 ord = 0xFF; 02389 } else { 02390 if (a == AM_LFN) { /* An LFN entry is found */ 02391 if (c & LLEF) { /* Is it start of an LFN sequence? */ 02392 sum = dp->dir[LDIR_Chksum]; 02393 c &= (BYTE)~LLEF; ord = c; 02394 dp->blk_ofs = dp->dptr; 02395 } 02396 /* Check LFN validity and capture it */ 02397 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 02398 } else { /* An SFN entry is found */ 02399 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */ 02400 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */ 02401 } 02402 break; 02403 } 02404 } 02405 #else /* Non LFN configuration */ 02406 if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */ 02407 break; 02408 } 02409 #endif 02410 } 02411 res = dir_next(dp, 0); /* Next entry */ 02412 if (res != FR_OK) break; 02413 } 02414 02415 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */ 02416 return res; 02417 } 02418 02419 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */ 02420 02421 02422 02423 /*-----------------------------------------------------------------------*/ 02424 /* Directory handling - Find an object in the directory */ 02425 /*-----------------------------------------------------------------------*/ 02426 02427 static 02428 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 02429 FATFS_DIR* dp /* Pointer to the directory object with the file name */ 02430 ) 02431 { 02432 FRESULT res; 02433 FATFS *fs = dp->obj.fs; 02434 BYTE c; 02435 #if FF_USE_LFN 02436 BYTE a, ord, sum; 02437 #endif 02438 02439 res = dir_sdi(dp, 0); /* Rewind directory object */ 02440 if (res != FR_OK) return res; 02441 #if FF_FS_EXFAT 02442 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02443 BYTE nc; 02444 UINT di, ni; 02445 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */ 02446 02447 while ((res = dir_read_file(dp)) == FR_OK) { /* Read an item */ 02448 #if FF_MAX_LFN < 255 02449 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */ 02450 #endif 02451 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */ 02452 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */ 02453 if ((di % SZDIRE) == 0) di += 2; 02454 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break; 02455 } 02456 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */ 02457 } 02458 return res; 02459 } 02460 #endif 02461 /* On the FAT/FAT32 volume */ 02462 #if FF_USE_LFN 02463 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02464 #endif 02465 do { 02466 res = move_window(fs, dp->sect); 02467 if (res != FR_OK) break; 02468 c = dp->dir[DIR_Name]; 02469 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 02470 #if FF_USE_LFN /* LFN configuration */ 02471 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; 02472 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 02473 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02474 } else { 02475 if (a == AM_LFN) { /* An LFN entry is found */ 02476 if (!(dp->fn[NSFLAG] & NS_NOLFN)) { 02477 if (c & LLEF) { /* Is it start of LFN sequence? */ 02478 sum = dp->dir[LDIR_Chksum]; 02479 c &= (BYTE)~LLEF; ord = c; /* LFN start order */ 02480 dp->blk_ofs = dp->dptr; /* Start offset of LFN */ 02481 } 02482 /* Check validity of the LFN entry and compare it with given name */ 02483 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 02484 } 02485 } else { /* An SFN entry is found */ 02486 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */ 02487 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */ 02488 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02489 } 02490 } 02491 #else /* Non LFN configuration */ 02492 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK; 02493 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */ 02494 #endif 02495 res = dir_next(dp, 0); /* Next entry */ 02496 } while (res == FR_OK); 02497 02498 return res; 02499 } 02500 02501 02502 02503 02504 #if !FF_FS_READONLY 02505 /*-----------------------------------------------------------------------*/ 02506 /* Register an object to the directory */ 02507 /*-----------------------------------------------------------------------*/ 02508 02509 static 02510 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 02511 FATFS_DIR* dp /* Target directory with object name to be created */ 02512 ) 02513 { 02514 FRESULT res; 02515 FATFS *fs = dp->obj.fs; 02516 #if FF_USE_LFN /* LFN configuration */ 02517 UINT n, nlen, nent; 02518 BYTE sn[12], sum; 02519 02520 02521 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */ 02522 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */ 02523 02524 #if FF_FS_EXFAT 02525 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02526 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */ 02527 res = dir_alloc(dp, nent); /* Allocate entries */ 02528 if (res != FR_OK) return res; 02529 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */ 02530 02531 if (dp->obj.stat & 4) { /* Has the directory been stretched? */ 02532 dp->obj.stat &= ~4; 02533 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */ 02534 if (res != FR_OK) return res; 02535 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */ 02536 if (res != FR_OK) return res; 02537 if (dp->obj.sclust != 0) { /* Is it a sub directory? */ 02538 FATFS_DIR dj; 02539 02540 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */ 02541 if (res != FR_OK) return res; 02542 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */ 02543 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */ 02544 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize); 02545 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; 02546 res = store_xdir(&dj); /* Store the object status */ 02547 if (res != FR_OK) return res; 02548 } 02549 } 02550 02551 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */ 02552 return FR_OK; 02553 } 02554 #endif 02555 /* On the FAT/FAT32 volume */ 02556 mem_cpy(sn, dp->fn, 12); 02557 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 02558 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */ 02559 for (n = 1; n < 100; n++) { 02560 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */ 02561 res = dir_find(dp); /* Check if the name collides with existing SFN */ 02562 if (res != FR_OK) break; 02563 } 02564 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 02565 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 02566 dp->fn[NSFLAG] = sn[NSFLAG]; 02567 } 02568 02569 /* Create an SFN with/without LFNs. */ 02570 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */ 02571 res = dir_alloc(dp, nent); /* Allocate entries */ 02572 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 02573 res = dir_sdi(dp, dp->dptr - nent * SZDIRE); 02574 if (res == FR_OK) { 02575 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 02576 do { /* Store LFN entries in bottom first */ 02577 res = move_window(fs, dp->sect); 02578 if (res != FR_OK) break; 02579 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum); 02580 fs->wflag = 1; 02581 res = dir_next(dp, 0); /* Next entry */ 02582 } while (res == FR_OK && --nent); 02583 } 02584 } 02585 02586 #else /* Non LFN configuration */ 02587 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 02588 02589 #endif 02590 02591 /* Set SFN entry */ 02592 if (res == FR_OK) { 02593 res = move_window(fs, dp->sect); 02594 if (res == FR_OK) { 02595 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */ 02596 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */ 02597 #if FF_USE_LFN 02598 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 02599 #endif 02600 fs->wflag = 1; 02601 } 02602 } 02603 02604 return res; 02605 } 02606 02607 #endif /* !FF_FS_READONLY */ 02608 02609 02610 02611 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0 02612 /*-----------------------------------------------------------------------*/ 02613 /* Remove an object from the directory */ 02614 /*-----------------------------------------------------------------------*/ 02615 02616 static 02617 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 02618 FATFS_DIR* dp /* Directory object pointing the entry to be removed */ 02619 ) 02620 { 02621 FRESULT res; 02622 FATFS *fs = dp->obj.fs; 02623 #if FF_USE_LFN /* LFN configuration */ 02624 DWORD last = dp->dptr; 02625 02626 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */ 02627 if (res == FR_OK) { 02628 do { 02629 res = move_window(fs, dp->sect); 02630 if (res != FR_OK) break; 02631 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02632 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */ 02633 } else { /* On the FAT/FAT32 volume */ 02634 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */ 02635 } 02636 fs->wflag = 1; 02637 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */ 02638 res = dir_next(dp, 0); /* Next entry */ 02639 } while (res == FR_OK); 02640 if (res == FR_NO_FILE) res = FR_INT_ERR; 02641 } 02642 #else /* Non LFN configuration */ 02643 02644 res = move_window(fs, dp->sect); 02645 if (res == FR_OK) { 02646 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/ 02647 fs->wflag = 1; 02648 } 02649 #endif 02650 02651 return res; 02652 } 02653 02654 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */ 02655 02656 02657 02658 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 02659 /*-----------------------------------------------------------------------*/ 02660 /* Get file information from directory entry */ 02661 /*-----------------------------------------------------------------------*/ 02662 02663 static 02664 void get_fileinfo ( 02665 FATFS_DIR* dp, /* Pointer to the directory object */ 02666 FILINFO* fno /* Pointer to the file information to be filled */ 02667 ) 02668 { 02669 UINT si, di; 02670 #if FF_USE_LFN 02671 WCHAR wc, hs; 02672 FATFS *fs = dp->obj.fs; 02673 #else 02674 TCHAR c; 02675 #endif 02676 02677 02678 fno->fname[0] = 0; /* Invaidate file info */ 02679 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */ 02680 02681 #if FF_USE_LFN /* LFN configuration */ 02682 #if FF_FS_EXFAT 02683 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02684 get_xfileinfo(fs->dirbuf, fno); 02685 return; 02686 } else 02687 #endif 02688 { /* On the FAT/FAT32 volume */ 02689 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */ 02690 si = di = hs = 0; 02691 while (fs->lfnbuf[si] != 0) { 02692 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */ 02693 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 02694 hs = wc; continue; /* Get low surrogate */ 02695 } 02696 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */ 02697 if (wc == 0) { di = 0; break; } /* Invalid char or buffer overflow? */ 02698 di += wc; 02699 hs = 0; 02700 } 02701 if (hs != 0) di = 0; /* Broken surrogate pair? */ 02702 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */ 02703 } 02704 } 02705 02706 si = di = 0; 02707 while (si < 11) { /* Get SFN from SFN entry */ 02708 wc = dp->dir[si++]; /* Get a char */ 02709 if (wc == ' ') continue; /* Skip padding spaces */ 02710 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */ 02711 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */ 02712 #if FF_LFN_UNICODE >= 1 /* Unicode output */ 02713 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */ 02714 wc = wc << 8 | dp->dir[si++]; 02715 } 02716 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */ 02717 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */ 02718 wc = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in UTF-16 or UTF-8 */ 02719 if (wc == 0) { di = 0; break; } /* Buffer overflow? */ 02720 di += wc; 02721 #else /* ANSI/OEM output */ 02722 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */ 02723 #endif 02724 } 02725 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */ 02726 02727 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */ 02728 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */ 02729 fno->fname[di++] = '?'; 02730 } else { 02731 for (si = di = 0; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */ 02732 wc = (WCHAR)fno->altname[si]; 02733 if (IsUpper(wc) && (dp->dir[DIR_NTres] & ((si >= 9) ? NS_EXT : NS_BODY))) wc += 0x20; 02734 fno->fname[di] = (TCHAR)wc; 02735 } 02736 } 02737 fno->fname[di] = 0; /* Terminate the LFN */ 02738 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */ 02739 } 02740 02741 #else /* Non-LFN configuration */ 02742 si = di = 0; 02743 while (si < 11) { /* Copy name body and extension */ 02744 c = (TCHAR)dp->dir[si++]; 02745 if (c == ' ') continue; /* Skip padding spaces */ 02746 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */ 02747 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */ 02748 fno->fname[di++] = c; 02749 } 02750 fno->fname[di] = 0; 02751 #endif 02752 02753 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */ 02754 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */ 02755 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */ 02756 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */ 02757 } 02758 02759 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 02760 02761 02762 02763 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1 02764 /*-----------------------------------------------------------------------*/ 02765 /* Pattern matching */ 02766 /*-----------------------------------------------------------------------*/ 02767 02768 static 02769 DWORD get_achar ( /* Get a character and advances ptr */ 02770 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */ 02771 ) 02772 { 02773 DWORD chr; 02774 02775 02776 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */ 02777 chr = tchar2uni(ptr); 02778 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */ 02779 chr = ff_wtoupper(chr); 02780 02781 #else /* ANSI/OEM input */ 02782 chr = (BYTE)*(*ptr)++; /* Get a byte */ 02783 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 02784 #if FF_CODE_PAGE == 0 02785 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 02786 #elif FF_CODE_PAGE < 900 02787 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 02788 #endif 02789 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900 02790 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */ 02791 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0; 02792 } 02793 #endif 02794 02795 #endif 02796 return chr; 02797 } 02798 02799 02800 static 02801 int pattern_matching ( /* 0:not matched, 1:matched */ 02802 const TCHAR* pat, /* Matching pattern */ 02803 const TCHAR* nam, /* String to be tested */ 02804 int skip, /* Number of pre-skip chars (number of ?s) */ 02805 int inf /* Infinite search (* specified) */ 02806 ) 02807 { 02808 const TCHAR *pp, *np; 02809 DWORD pc, nc; 02810 int nm, nx; 02811 02812 02813 while (skip--) { /* Pre-skip name chars */ 02814 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 02815 } 02816 if (*pat == 0 && inf) return 1; /* (short circuit) */ 02817 02818 do { 02819 pp = pat; np = nam; /* Top of pattern and name to match */ 02820 for (;;) { 02821 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 02822 nm = nx = 0; 02823 do { /* Analyze the wildcard block */ 02824 if (*pp++ == '?') nm++; else nx = 1; 02825 } while (*pp == '?' || *pp == '*'); 02826 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 02827 nc = *np; break; /* Branch mismatched */ 02828 } 02829 pc = get_achar(&pp); /* Get a pattern char */ 02830 nc = get_achar(&np); /* Get a name char */ 02831 if (pc != nc) break; /* Branch mismatched? */ 02832 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */ 02833 } 02834 get_achar(&nam); /* nam++ */ 02835 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 02836 02837 return 0; 02838 } 02839 02840 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */ 02841 02842 02843 02844 /*-----------------------------------------------------------------------*/ 02845 /* Pick a top segment and create the object name in directory form */ 02846 /*-----------------------------------------------------------------------*/ 02847 02848 static 02849 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 02850 FATFS_DIR* dp, /* Pointer to the directory object */ 02851 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 02852 ) 02853 { 02854 #if FF_USE_LFN /* LFN configuration */ 02855 BYTE b, cf; 02856 WCHAR wc, *lfn; 02857 DWORD uc; 02858 UINT i, ni, si, di; 02859 const TCHAR *p; 02860 02861 02862 /* Create LFN into LFN working buffer */ 02863 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0; 02864 for (;;) { 02865 uc = tchar2uni(&p); /* Get a character */ 02866 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */ 02867 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */ 02868 wc = (WCHAR)uc; 02869 if (wc < ' ' || wc == '/' || wc == '\\') break; /* Break if end of the path or a separator is found */ 02870 if (wc < 0x80 && chk_chr("\"*:<>\?|\x7F", wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */ 02871 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */ 02872 lfn[di++] = wc; /* Store the Unicode character */ 02873 } 02874 while (*p == '/' || *p == '\\') p++; /* Skip duplicated separators if exist */ 02875 *path = p; /* Return pointer to the next segment */ 02876 cf = (wc < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 02877 02878 #if FF_FS_RPATH != 0 02879 if ((di == 1 && lfn[di - 1] == '.') || 02880 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */ 02881 lfn[di] = 0; 02882 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */ 02883 dp->fn[i] = (i < di) ? '.' : ' '; 02884 } 02885 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 02886 return FR_OK; 02887 } 02888 #endif 02889 while (di) { /* Snip off trailing spaces and dots if exist */ 02890 wc = lfn[di - 1]; 02891 if (wc != ' ' && wc != '.') break; 02892 di--; 02893 } 02894 lfn[di] = 0; /* LFN is created into the working buffer */ 02895 if (di == 0) return FR_INVALID_NAME; /* Reject null name */ 02896 02897 /* Create SFN in directory form */ 02898 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */ 02899 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */ 02900 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */ 02901 02902 mem_set(dp->fn, ' ', 11); 02903 i = b = 0; ni = 8; 02904 for (;;) { 02905 wc = lfn[si++]; /* Get an LFN character */ 02906 if (wc == 0) break; /* Break on end of the LFN */ 02907 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */ 02908 cf |= NS_LOSS | NS_LFN; 02909 continue; 02910 } 02911 02912 if (i >= ni || si == di) { /* End of field? */ 02913 if (ni == 11) { /* Name extension overflow? */ 02914 cf |= NS_LOSS | NS_LFN; 02915 break; 02916 } 02917 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */ 02918 if (si > di) break; /* No name extension? */ 02919 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */ 02920 continue; 02921 } 02922 02923 if (wc >= 0x80) { /* Is this a non-ASCII character? */ 02924 cf |= NS_LFN; /* LFN entry needs to be created */ 02925 #if FF_CODE_PAGE == 0 02926 if (ExCvt) { /* At SBCS */ 02927 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 02928 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 02929 } else { /* At DBCS */ 02930 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 02931 } 02932 #elif FF_CODE_PAGE < 900 /* SBCS cfg */ 02933 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 02934 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 02935 #else /* DBCS cfg */ 02936 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 02937 #endif 02938 } 02939 02940 if (wc >= 0x100) { /* Is this a DBC? */ 02941 if (i >= ni - 1) { /* Field overflow? */ 02942 cf |= NS_LOSS | NS_LFN; 02943 i = ni; continue; /* Next field */ 02944 } 02945 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */ 02946 } else { /* SBC */ 02947 if (wc == 0 || chk_chr("+,;=[]", wc)) { /* Replace illegal characters for SFN if needed */ 02948 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 02949 } else { 02950 if (IsUpper(wc)) { /* ASCII upper case? */ 02951 b |= 2; 02952 } 02953 if (IsLower(wc)) { /* ASCII lower case? */ 02954 b |= 1; wc -= 0x20; 02955 } 02956 } 02957 } 02958 dp->fn[i++] = (BYTE)wc; 02959 } 02960 02961 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 02962 02963 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */ 02964 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */ 02965 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 02966 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */ 02967 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */ 02968 } 02969 02970 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */ 02971 02972 return FR_OK; 02973 02974 02975 #else /* FF_USE_LFN : Non-LFN configuration */ 02976 BYTE c, d, *sfn; 02977 UINT ni, si, i; 02978 const char *p; 02979 02980 /* Create file name in directory form */ 02981 p = *path; sfn = dp->fn; 02982 mem_set(sfn, ' ', 11); 02983 si = i = 0; ni = 8; 02984 #if FF_FS_RPATH != 0 02985 if (p[si] == '.') { /* Is this a dot entry? */ 02986 for (;;) { 02987 c = (BYTE)p[si++]; 02988 if (c != '.' || si >= 3) break; 02989 sfn[i++] = c; 02990 } 02991 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 02992 *path = p + si; /* Return pointer to the next segment */ 02993 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */ 02994 return FR_OK; 02995 } 02996 #endif 02997 for (;;) { 02998 c = (BYTE)p[si++]; /* Get a byte */ 02999 if (c <= ' ') break; /* Break if end of the path name */ 03000 if (c == '/' || c == '\\') { /* Break if a separator is found */ 03001 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ 03002 break; 03003 } 03004 if (c == '.' || i >= ni) { /* End of body or field overflow? */ 03005 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */ 03006 i = 8; ni = 11; /* Enter file extension field */ 03007 continue; 03008 } 03009 #if FF_CODE_PAGE == 0 03010 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */ 03011 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 03012 } 03013 #elif FF_CODE_PAGE < 900 03014 if (c >= 0x80) { /* Is SBC extended character? */ 03015 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 03016 } 03017 #endif 03018 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */ 03019 d = (BYTE)p[si++]; /* Get 2nd byte */ 03020 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */ 03021 sfn[i++] = c; 03022 sfn[i++] = d; 03023 } else { /* SBC */ 03024 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */ 03025 if (IsLower(c)) c -= 0x20; /* To upper */ 03026 sfn[i++] = c; 03027 } 03028 } 03029 *path = p + si; /* Return pointer to the next segment */ 03030 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */ 03031 03032 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 03033 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 03034 03035 return FR_OK; 03036 #endif /* FF_USE_LFN */ 03037 } 03038 03039 03040 03041 03042 /*-----------------------------------------------------------------------*/ 03043 /* Follow a file path */ 03044 /*-----------------------------------------------------------------------*/ 03045 03046 static 03047 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 03048 FATFS_DIR* dp, /* Directory object to return last directory and found object */ 03049 const TCHAR* path /* Full-path string to find a file or directory */ 03050 ) 03051 { 03052 FRESULT res; 03053 BYTE ns; 03054 FATFS *fs = dp->obj.fs; 03055 03056 03057 #if FF_FS_RPATH != 0 03058 if (*path != '/' && *path != '\\') { /* Without heading separator */ 03059 dp->obj.sclust = fs->cdir; /* Start from current directory */ 03060 } else 03061 #endif 03062 { /* With heading separator */ 03063 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */ 03064 dp->obj.sclust = 0; /* Start from root directory */ 03065 } 03066 #if FF_FS_EXFAT 03067 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */ 03068 #if FF_FS_RPATH != 0 03069 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */ 03070 FATFS_DIR dj; 03071 03072 dp->obj.c_scl = fs->cdc_scl; 03073 dp->obj.c_size = fs->cdc_size; 03074 dp->obj.c_ofs = fs->cdc_ofs; 03075 res = load_obj_xdir(&dj, &dp->obj); 03076 if (res != FR_OK) return res; 03077 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize); 03078 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 03079 } 03080 #endif 03081 #endif 03082 03083 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 03084 dp->fn[NSFLAG] = NS_NONAME; 03085 res = dir_sdi(dp, 0); 03086 03087 } else { /* Follow path */ 03088 for (;;) { 03089 res = create_name(dp, &path); /* Get a segment name of the path */ 03090 if (res != FR_OK) break; 03091 res = dir_find(dp); /* Find an object with the segment name */ 03092 ns = dp->fn[NSFLAG]; 03093 if (res != FR_OK) { /* Failed to find the object */ 03094 if (res == FR_NO_FILE) { /* Object is not found */ 03095 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */ 03096 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 03097 dp->fn[NSFLAG] = NS_NONAME; 03098 res = FR_OK; 03099 } else { /* Could not find the object */ 03100 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 03101 } 03102 } 03103 break; 03104 } 03105 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 03106 /* Get into the sub-directory */ 03107 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 03108 res = FR_NO_PATH; break; 03109 } 03110 #if FF_FS_EXFAT 03111 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */ 03112 dp->obj.c_scl = dp->obj.sclust; 03113 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 03114 dp->obj.c_ofs = dp->blk_ofs; 03115 init_alloc_info(fs, &dp->obj); /* Open next directory */ 03116 } else 03117 #endif 03118 { 03119 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */ 03120 } 03121 } 03122 } 03123 03124 return res; 03125 } 03126 03127 03128 03129 03130 /*-----------------------------------------------------------------------*/ 03131 /* Get logical drive number from path name */ 03132 /*-----------------------------------------------------------------------*/ 03133 03134 static 03135 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 03136 const TCHAR** path /* Pointer to pointer to the path name */ 03137 ) 03138 { 03139 const TCHAR *tp, *tt; 03140 UINT i; 03141 int vol = -1; 03142 #if FF_STR_VOLUME_ID /* Find string drive id */ 03143 static const char* const volid[] = {FF_VOLUME_STRS}; 03144 const char *sp; 03145 char c; 03146 TCHAR tc; 03147 #endif 03148 03149 03150 if (*path != 0) { /* If the pointer is not a null */ 03151 for (tt = *path; (UINT)*tt >= (FF_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find a colon in the path */ 03152 if (*tt == ':') { /* If a colon is exist in the path name */ 03153 tp = *path; 03154 i = *tp++; 03155 if (IsDigit(i) && tp == tt) { /* Is there a numeric drive id + colon? */ 03156 if ((i -= '0') < FF_VOLUMES) { /* If drive id is found, get the value and strip it */ 03157 vol = (int)i; 03158 *path = ++tt; 03159 } 03160 } 03161 #if FF_STR_VOLUME_ID 03162 else { /* No numeric drive number, find string drive id */ 03163 i = 0; tt++; 03164 do { 03165 sp = volid[i]; tp = *path; 03166 do { /* Compare a string drive id with path name */ 03167 c = *sp++; tc = *tp++; 03168 if (IsLower(tc)) tc -= 0x20; 03169 } while (c && (TCHAR)c == tc); 03170 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */ 03171 if (i < FF_VOLUMES) { /* If a drive id is found, get the value and strip it */ 03172 vol = (int)i; 03173 *path = tt; 03174 } 03175 } 03176 #endif 03177 } else { /* No volume id and use default drive */ 03178 #if FF_FS_RPATH != 0 && FF_VOLUMES >= 2 03179 vol = CurrVol; /* Current drive */ 03180 #else 03181 vol = 0; /* Drive 0 */ 03182 #endif 03183 } 03184 } 03185 return vol; 03186 } 03187 03188 03189 03190 03191 /*-----------------------------------------------------------------------*/ 03192 /* Load a sector and check if it is an FAT VBR */ 03193 /*-----------------------------------------------------------------------*/ 03194 03195 static 03196 BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */ 03197 FATFS* fs, /* Filesystem object */ 03198 DWORD sect /* Sector# (lba) to load and check if it is an FAT-VBR or not */ 03199 ) 03200 { 03201 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 03202 if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */ 03203 03204 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed here even if the sector size is >512) */ 03205 03206 #if FF_FS_EXFAT 03207 if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */ 03208 #endif 03209 if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) { /* Valid JumpBoot code? */ 03210 if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */ 03211 if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */ 03212 } 03213 return 2; /* Valid BS but not FAT */ 03214 } 03215 03216 03217 03218 03219 /*-----------------------------------------------------------------------*/ 03220 /* Determine logical drive number and mount the volume if needed */ 03221 /*-----------------------------------------------------------------------*/ 03222 03223 static 03224 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 03225 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 03226 FATFS** rfs, /* Pointer to pointer to the found filesystem object */ 03227 BYTE mode /* !=0: Check write protection for write access */ 03228 ) 03229 { 03230 BYTE fmt, *pt; 03231 int vol; 03232 DSTATUS stat; 03233 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; 03234 WORD nrsv; 03235 FATFS *fs; 03236 UINT i; 03237 03238 03239 /* Get logical drive number */ 03240 *rfs = 0; 03241 vol = get_ldnumber(path); 03242 if (vol < 0) return FR_INVALID_DRIVE; 03243 03244 /* Check if the filesystem object is valid or not */ 03245 fs = FatFs[vol]; /* Get pointer to the filesystem object */ 03246 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */ 03247 #if FF_FS_REENTRANT 03248 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */ 03249 #endif 03250 *rfs = fs; /* Return pointer to the filesystem object */ 03251 03252 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */ 03253 if (fs->fs_type != 0) { /* If the volume has been mounted */ 03254 stat = disk_status(fs->pdrv); 03255 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 03256 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */ 03257 return FR_WRITE_PROTECTED; 03258 } 03259 return FR_OK; /* The filesystem object is valid */ 03260 } 03261 } 03262 03263 /* The filesystem object is not valid. */ 03264 /* Following code attempts to mount the volume. (analyze BPB and initialize the filesystem object) */ 03265 03266 fs->fs_type = 0; /* Clear the filesystem object */ 03267 fs->pdrv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 03268 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */ 03269 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */ 03270 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 03271 } 03272 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */ 03273 return FR_WRITE_PROTECTED; 03274 } 03275 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */ 03276 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR; 03277 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR; 03278 #endif 03279 03280 #if FF_FS_HEAPBUF 03281 if (!fs->win) { 03282 fs->win = (BYTE*)ff_memalloc(SS(fs)); /* Allocate buffer to back window if necessary */ 03283 if (!fs->win) 03284 return FR_NOT_ENOUGH_CORE; 03285 } 03286 #endif 03287 03288 /* Find an FAT partition on the drive. Supports only generic partitioning rules, FDISK and SFD. */ 03289 bsect = 0; 03290 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */ 03291 if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */ 03292 for (i = 0; i < 4; i++) { /* Get partition offset */ 03293 pt = fs->win + (MBR_Table + i * SZ_PTE); 03294 br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0; 03295 } 03296 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 03297 if (i != 0) i--; 03298 do { /* Find an FAT volume */ 03299 bsect = br[i]; 03300 fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */ 03301 } while (LD2PT(vol) == 0 && fmt >= 2 && ++i < 4); 03302 } 03303 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 03304 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 03305 03306 /* An FAT volume is found (bsect). Following code initializes the filesystem object */ 03307 03308 #if FF_FS_EXFAT 03309 if (fmt == 1) { 03310 QWORD maxlba; 03311 03312 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */ 03313 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM; 03314 03315 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */ 03316 03317 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */ 03318 return FR_NO_FILESYSTEM; 03319 } 03320 03321 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */ 03322 if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */ 03323 03324 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */ 03325 03326 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */ 03327 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */ 03328 03329 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */ 03330 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */ 03331 03332 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */ 03333 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */ 03334 fs->n_fatent = nclst + 2; 03335 03336 /* Boundaries and Limits */ 03337 fs->volbase = bsect; 03338 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx); 03339 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx); 03340 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */ 03341 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx); 03342 03343 /* Check if bitmap location is in assumption (at the first cluster) */ 03344 if (move_window(fs, clst2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR; 03345 for (i = 0; i < SS(fs); i += SZDIRE) { 03346 if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */ 03347 } 03348 if (i == SS(fs)) return FR_NO_FILESYSTEM; 03349 #if !FF_FS_READONLY 03350 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 03351 #endif 03352 fmt = FS_EXFAT; /* FAT sub-type */ 03353 } else 03354 #endif /* FF_FS_EXFAT */ 03355 { 03356 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */ 03357 03358 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 03359 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32); 03360 fs->fsize = fasize; 03361 03362 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */ 03363 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 03364 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 03365 03366 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */ 03367 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 03368 03369 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 03370 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */ 03371 03372 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 03373 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32); 03374 03375 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 03376 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 03377 03378 /* Determine the FAT sub type */ 03379 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + FATFS_DIR */ 03380 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 03381 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 03382 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 03383 fmt = 0; 03384 if (nclst <= MAX_FAT32) fmt = FS_FAT32; 03385 if (nclst <= MAX_FAT16) fmt = FS_FAT16; 03386 if (nclst <= MAX_FAT12) fmt = FS_FAT12; 03387 if (fmt == 0) return FR_NO_FILESYSTEM; 03388 03389 /* Boundaries and Limits */ 03390 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 03391 fs->volbase = bsect; /* Volume start sector */ 03392 fs->fatbase = bsect + nrsv; /* FAT start sector */ 03393 fs->database = bsect + sysect; /* Data start sector */ 03394 if (fmt == FS_FAT32) { 03395 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */ 03396 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 03397 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */ 03398 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 03399 } else { 03400 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 03401 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 03402 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 03403 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 03404 } 03405 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */ 03406 03407 #if !FF_FS_READONLY 03408 /* Get FSInfo if available */ 03409 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 03410 fs->fsi_flag = 0x80; 03411 #if (FF_FS_NOFSINFO & 3) != 3 03412 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */ 03413 && ld_word(fs->win + BPB_FSInfo32) == 1 03414 && move_window(fs, bsect + 1) == FR_OK) 03415 { 03416 fs->fsi_flag = 0; 03417 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */ 03418 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252 03419 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272) 03420 { 03421 #if (FF_FS_NOFSINFO & 1) == 0 03422 fs->free_clst = ld_dword(fs->win + FSI_Free_Count); 03423 #endif 03424 #if (FF_FS_NOFSINFO & 2) == 0 03425 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free); 03426 #endif 03427 } 03428 } 03429 #endif /* (FF_FS_NOFSINFO & 3) != 3 */ 03430 #endif /* !FF_FS_READONLY */ 03431 } 03432 03433 fs->fs_type = fmt; /* FAT sub-type */ 03434 fs->id = ++Fsid; /* Volume mount ID */ 03435 #if FF_USE_LFN == 1 03436 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */ 03437 #if FF_FS_EXFAT 03438 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */ 03439 #endif 03440 #endif 03441 #if FF_FS_RPATH != 0 03442 fs->cdir = 0; /* Initialize current directory */ 03443 #endif 03444 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */ 03445 clear_lock(fs); 03446 #endif 03447 return FR_OK; 03448 } 03449 03450 03451 03452 03453 /*-----------------------------------------------------------------------*/ 03454 /* Check if the file/directory object is valid or not */ 03455 /*-----------------------------------------------------------------------*/ 03456 03457 static 03458 FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */ 03459 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/FATFS_DIR object, to check validity */ 03460 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */ 03461 ) 03462 { 03463 FRESULT res = FR_INVALID_OBJECT; 03464 03465 03466 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */ 03467 #if FF_FS_REENTRANT 03468 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */ 03469 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 03470 res = FR_OK; 03471 } else { 03472 unlock_fs(obj->fs, FR_OK); 03473 } 03474 } else { 03475 res = FR_TIMEOUT; 03476 } 03477 #else 03478 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 03479 res = FR_OK; 03480 } 03481 #endif 03482 } 03483 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */ 03484 return res; 03485 } 03486 03487 03488 03489 03490 /*--------------------------------------------------------------------------- 03491 03492 Public Functions (FatFs API) 03493 03494 ----------------------------------------------------------------------------*/ 03495 03496 03497 03498 /*-----------------------------------------------------------------------*/ 03499 /* Mount/Unmount a Logical Drive */ 03500 /*-----------------------------------------------------------------------*/ 03501 03502 FRESULT f_mount ( 03503 FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/ 03504 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 03505 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */ 03506 ) 03507 { 03508 FATFS *cfs; 03509 int vol; 03510 FRESULT res; 03511 const TCHAR *rp = path; 03512 03513 03514 /* Get logical drive number */ 03515 vol = get_ldnumber(&rp); 03516 if (vol < 0) return FR_INVALID_DRIVE; 03517 cfs = FatFs[vol]; /* Pointer to fs object */ 03518 03519 if (cfs) { 03520 #if FF_FS_LOCK != 0 03521 clear_lock(cfs); 03522 #endif 03523 #if FF_FS_REENTRANT /* Discard sync object of the current volume */ 03524 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 03525 #endif 03526 cfs->fs_type = 0; /* Clear old fs object */ 03527 #if FF_FS_HEAPBUF 03528 ff_memfree(cfs->win); /* Clean up window buffer */ 03529 #endif 03530 } 03531 03532 if (fs) { 03533 fs->fs_type = 0; /* Clear new fs object */ 03534 #if FF_FS_REENTRANT /* Create sync object for the new volume */ 03535 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 03536 #endif 03537 #if FF_FS_HEAPBUF 03538 fs->win = 0; /* NULL buffer to prevent use of uninitialized buffer */ 03539 #endif 03540 } 03541 FatFs[vol] = fs; /* Register new fs object */ 03542 03543 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */ 03544 03545 res = find_volume(&path, &fs, 0); /* Force mounted the volume */ 03546 LEAVE_FF(fs, res); 03547 } 03548 03549 03550 03551 03552 /*-----------------------------------------------------------------------*/ 03553 /* Open or Create a File */ 03554 /*-----------------------------------------------------------------------*/ 03555 03556 FRESULT f_open ( 03557 FIL* fp, /* Pointer to the blank file object */ 03558 const TCHAR* path, /* Pointer to the file name */ 03559 BYTE mode /* Access mode and file open mode flags */ 03560 ) 03561 { 03562 FRESULT res; 03563 FATFS_DIR dj; 03564 FATFS *fs; 03565 #if !FF_FS_READONLY 03566 DWORD dw, cl, bcs, clst, sc; 03567 FSIZE_t ofs; 03568 #endif 03569 DEF_NAMBUF 03570 03571 03572 if (!fp) return FR_INVALID_OBJECT; 03573 03574 /* Get logical drive */ 03575 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND; 03576 res = find_volume(&path, &fs, mode); 03577 if (res == FR_OK) { 03578 dj.obj.fs = fs; 03579 INIT_NAMBUF(fs); 03580 res = follow_path(&dj, path); /* Follow the file path */ 03581 #if !FF_FS_READONLY /* Read/Write configuration */ 03582 if (res == FR_OK) { 03583 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ 03584 res = FR_INVALID_NAME; 03585 } 03586 #if FF_FS_LOCK != 0 03587 else { 03588 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */ 03589 } 03590 #endif 03591 } 03592 /* Create or Open a file */ 03593 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 03594 if (res != FR_OK) { /* No file, create new */ 03595 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */ 03596 #if FF_FS_LOCK != 0 03597 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 03598 #else 03599 res = dir_register(&dj); 03600 #endif 03601 } 03602 mode |= FA_CREATE_ALWAYS; /* File is created */ 03603 } 03604 else { /* Any object with the same name is already existing */ 03605 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_DIR) */ 03606 res = FR_DENIED; 03607 } else { 03608 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */ 03609 } 03610 } 03611 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */ 03612 #if FF_FS_EXFAT 03613 if (fs->fs_type == FS_EXFAT) { 03614 /* Get current allocation info */ 03615 fp->obj.fs = fs; 03616 init_alloc_info(fs, &fp->obj); 03617 /* Set directory entry block initial state */ 03618 mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */ 03619 mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */ 03620 fs->dirbuf[XDIR_Attr] = AM_ARC; 03621 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME()); 03622 fs->dirbuf[XDIR_GenFlags] = 1; 03623 res = store_xdir(&dj); 03624 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */ 03625 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 03626 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */ 03627 } 03628 } else 03629 #endif 03630 { 03631 /* Set directory entry initial state */ 03632 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */ 03633 st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */ 03634 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */ 03635 st_clust(fs, dj.dir, 0); /* Reset file allocation info */ 03636 st_dword(dj.dir + DIR_FileSize, 0); 03637 fs->wflag = 1; 03638 if (cl != 0) { /* Remove the cluster chain if exist */ 03639 dw = fs->winsect; 03640 res = remove_chain(&dj.obj, cl, 0); 03641 if (res == FR_OK) { 03642 res = move_window(fs, dw); 03643 fs->last_clst = cl - 1; /* Reuse the cluster hole */ 03644 } 03645 } 03646 } 03647 } 03648 } 03649 else { /* Open an existing file */ 03650 if (res == FR_OK) { /* Is the object exsiting? */ 03651 if (dj.obj.attr & AM_DIR) { /* File open against a directory */ 03652 res = FR_NO_FILE; 03653 } else { 03654 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */ 03655 res = FR_DENIED; 03656 } 03657 } 03658 } 03659 } 03660 if (res == FR_OK) { 03661 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */ 03662 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */ 03663 fp->dir_ptr = dj.dir; 03664 #if FF_FS_LOCK != 0 03665 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */ 03666 if (fp->obj.lockid == 0) res = FR_INT_ERR; 03667 #endif 03668 } 03669 #else /* R/O configuration */ 03670 if (res == FR_OK) { 03671 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */ 03672 res = FR_INVALID_NAME; 03673 } else { 03674 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */ 03675 res = FR_NO_FILE; 03676 } 03677 } 03678 } 03679 #endif 03680 03681 if (res == FR_OK) { 03682 #if FF_FS_EXFAT 03683 if (fs->fs_type == FS_EXFAT) { 03684 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */ 03685 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 03686 fp->obj.c_ofs = dj.blk_ofs; 03687 init_alloc_info(fs, &fp->obj); 03688 } else 03689 #endif 03690 { 03691 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */ 03692 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize); 03693 } 03694 #if FF_USE_FASTSEEK 03695 fp->cltbl = 0; /* Disable fast seek mode */ 03696 #endif 03697 fp->obj.fs = fs; /* Validate the file object */ 03698 fp->obj.id = fs->id; 03699 fp->flag = mode; /* Set file access mode */ 03700 fp->err = 0; /* Clear error flag */ 03701 fp->sect = 0; /* Invalidate current data sector */ 03702 fp->fptr = 0; /* Set file pointer top of the file */ 03703 #if !FF_FS_READONLY 03704 #if !FF_FS_TINY 03705 #if FF_FS_HEAPBUF 03706 fp->buf = (BYTE*)ff_memalloc(SS(dj.obj.fs)); /* Allocate buffer if necessary */ 03707 if (!fp->buf) 03708 return FR_NOT_ENOUGH_CORE; 03709 #endif 03710 mem_set(fp->buf, 0, FF_MAX_SS); /* Clear sector buffer */ 03711 #endif 03712 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */ 03713 fp->fptr = fp->obj.objsize; /* Offset to seek */ 03714 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */ 03715 clst = fp->obj.sclust; /* Follow the cluster chain */ 03716 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) { 03717 clst = get_fat(&fp->obj, clst); 03718 if (clst <= 1) res = FR_INT_ERR; 03719 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR; 03720 } 03721 fp->clust = clst; 03722 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */ 03723 if ((sc = clst2sect(fs, clst)) == 0) { 03724 res = FR_INT_ERR; 03725 } else { 03726 fp->sect = sc + (DWORD)(ofs / SS(fs)); 03727 #if !FF_FS_TINY 03728 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR; 03729 #endif 03730 } 03731 } 03732 } 03733 #endif 03734 } 03735 03736 FREE_NAMBUF(); 03737 } 03738 03739 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */ 03740 03741 LEAVE_FF(fs, res); 03742 } 03743 03744 03745 03746 03747 /*-----------------------------------------------------------------------*/ 03748 /* Read File */ 03749 /*-----------------------------------------------------------------------*/ 03750 03751 FRESULT f_read ( 03752 FIL* fp, /* Pointer to the file object */ 03753 void* buff, /* Pointer to data buffer */ 03754 UINT btr, /* Number of bytes to read */ 03755 UINT* br /* Pointer to number of bytes read */ 03756 ) 03757 { 03758 FRESULT res; 03759 FATFS *fs; 03760 DWORD clst, sect; 03761 FSIZE_t remain; 03762 UINT rcnt, cc, csect; 03763 BYTE *rbuff = (BYTE*)buff; 03764 03765 03766 *br = 0; /* Clear read byte counter */ 03767 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03768 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 03769 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 03770 remain = fp->obj.objsize - fp->fptr; 03771 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 03772 03773 for ( ; btr; /* Repeat until all data read */ 03774 btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) { 03775 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 03776 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 03777 if (csect == 0) { /* On the cluster boundary? */ 03778 if (fp->fptr == 0) { /* On the top of the file? */ 03779 clst = fp->obj.sclust; /* Follow cluster chain from the origin */ 03780 } else { /* Middle or end of the file */ 03781 #if FF_USE_FASTSEEK 03782 if (fp->cltbl) { 03783 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 03784 } else 03785 #endif 03786 { 03787 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */ 03788 } 03789 } 03790 if (clst < 2) ABORT(fs, FR_INT_ERR); 03791 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 03792 fp->clust = clst; /* Update current cluster */ 03793 } 03794 sect = clst2sect(fs, fp->clust); /* Get current sector */ 03795 if (sect == 0) ABORT(fs, FR_INT_ERR); 03796 sect += csect; 03797 cc = btr / SS(fs); /* When remaining bytes >= sector size, */ 03798 if (cc > 0) { /* Read maximum contiguous sectors directly */ 03799 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 03800 cc = fs->csize - csect; 03801 } 03802 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 03803 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 03804 #if FF_FS_TINY 03805 if (fs->wflag && fs->winsect - sect < cc) { 03806 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs)); 03807 } 03808 #else 03809 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) { 03810 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs)); 03811 } 03812 #endif 03813 #endif 03814 rcnt = SS(fs) * cc; /* Number of bytes transferred */ 03815 continue; 03816 } 03817 #if !FF_FS_TINY 03818 if (fp->sect != sect) { /* Load data sector if not in cache */ 03819 #if !FF_FS_READONLY 03820 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 03821 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 03822 fp->flag &= (BYTE)~FA_DIRTY; 03823 } 03824 #endif 03825 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 03826 } 03827 #endif 03828 fp->sect = sect; 03829 } 03830 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 03831 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */ 03832 #if FF_FS_TINY 03833 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 03834 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 03835 #else 03836 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 03837 #endif 03838 } 03839 03840 LEAVE_FF(fs, FR_OK); 03841 } 03842 03843 03844 03845 03846 #if !FF_FS_READONLY 03847 /*-----------------------------------------------------------------------*/ 03848 /* Write File */ 03849 /*-----------------------------------------------------------------------*/ 03850 03851 FRESULT f_write ( 03852 FIL* fp, /* Pointer to the file object */ 03853 const void* buff, /* Pointer to the data to be written */ 03854 UINT btw, /* Number of bytes to write */ 03855 UINT* bw /* Pointer to number of bytes written */ 03856 ) 03857 { 03858 FRESULT res; 03859 FATFS *fs; 03860 DWORD clst, sect; 03861 UINT wcnt, cc, csect; 03862 const BYTE *wbuff = (const BYTE*)buff; 03863 bool need_sync = false; 03864 03865 *bw = 0; /* Clear write byte counter */ 03866 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03867 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 03868 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 03869 03870 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */ 03871 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) { 03872 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr); 03873 } 03874 03875 for ( ; btw; /* Repeat until all data written */ 03876 btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) { 03877 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 03878 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */ 03879 if (csect == 0) { /* On the cluster boundary? */ 03880 if (fp->fptr == 0) { /* On the top of the file? */ 03881 clst = fp->obj.sclust; /* Follow from the origin */ 03882 if (clst == 0) { /* If no cluster is allocated, */ 03883 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */ 03884 } 03885 } else { /* On the middle or end of the file */ 03886 #if FF_USE_FASTSEEK 03887 if (fp->cltbl) { 03888 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 03889 } else 03890 #endif 03891 { 03892 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */ 03893 } 03894 } 03895 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 03896 if (clst == 1) ABORT(fs, FR_INT_ERR); 03897 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 03898 fp->clust = clst; /* Update current cluster */ 03899 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */ 03900 #if FLUSH_ON_NEW_CLUSTER 03901 // We do not need to flush for the first cluster 03902 if (fp->fptr != 0) { 03903 need_sync = true; 03904 } 03905 #endif 03906 } 03907 #if FF_FS_TINY 03908 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */ 03909 #else 03910 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */ 03911 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 03912 fp->flag &= (BYTE)~FA_DIRTY; 03913 } 03914 #endif 03915 sect = clst2sect(fs, fp->clust); /* Get current sector */ 03916 if (sect == 0) ABORT(fs, FR_INT_ERR); 03917 sect += csect; 03918 cc = btw / SS(fs); /* When remaining bytes >= sector size, */ 03919 if (cc > 0) { /* Write maximum contiguous sectors directly */ 03920 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 03921 cc = fs->csize - csect; 03922 } 03923 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 03924 #if FF_FS_MINIMIZE <= 2 03925 #if FF_FS_TINY 03926 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 03927 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs)); 03928 fs->wflag = 0; 03929 } 03930 #else 03931 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 03932 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs)); 03933 fp->flag &= (BYTE)~FA_DIRTY; 03934 } 03935 #endif 03936 #endif 03937 wcnt = SS(fs) * cc; /* Number of bytes transferred */ 03938 #if FLUSH_ON_NEW_SECTOR 03939 need_sync = true; 03940 #endif 03941 continue; 03942 } 03943 #if FF_FS_TINY 03944 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */ 03945 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); 03946 fs->winsect = sect; 03947 } 03948 #else 03949 if (fp->sect != sect && /* Fill sector cache with file data */ 03950 fp->fptr < fp->obj.objsize && 03951 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) { 03952 ABORT(fs, FR_DISK_ERR); 03953 } 03954 #endif 03955 fp->sect = sect; 03956 } 03957 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 03958 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */ 03959 #if FF_FS_TINY 03960 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 03961 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 03962 fs->wflag = 1; 03963 #else 03964 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 03965 fp->flag |= FA_DIRTY; 03966 #endif 03967 } 03968 03969 fp->flag |= FA_MODIFIED; /* Set file change flag */ 03970 03971 if (need_sync) { 03972 f_sync (fp); 03973 } 03974 03975 LEAVE_FF(fs, FR_OK); 03976 } 03977 03978 03979 03980 03981 /*-----------------------------------------------------------------------*/ 03982 /* Synchronize the File */ 03983 /*-----------------------------------------------------------------------*/ 03984 03985 FRESULT f_sync ( 03986 FIL* fp /* Pointer to the file object */ 03987 ) 03988 { 03989 FRESULT res; 03990 FATFS *fs; 03991 DWORD tm; 03992 BYTE *dir; 03993 03994 03995 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03996 if (res == FR_OK) { 03997 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */ 03998 #if !FF_FS_TINY 03999 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */ 04000 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR); 04001 fp->flag &= (BYTE)~FA_DIRTY; 04002 } 04003 #endif 04004 /* Update the directory entry */ 04005 tm = GET_FATTIME(); /* Modified time */ 04006 #if FF_FS_EXFAT 04007 if (fs->fs_type == FS_EXFAT) { 04008 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */ 04009 if (res == FR_OK) { 04010 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 04011 } 04012 if (res == FR_OK) { 04013 FATFS_DIR dj; 04014 DEF_NAMBUF 04015 04016 INIT_NAMBUF(fs); 04017 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */ 04018 if (res == FR_OK) { 04019 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 04020 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */ 04021 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); 04022 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); 04023 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); 04024 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */ 04025 fs->dirbuf[XDIR_ModTime10] = 0; 04026 st_dword(fs->dirbuf + XDIR_AccTime, 0); 04027 res = store_xdir(&dj); /* Restore it to the directory */ 04028 if (res == FR_OK) { 04029 res = sync_fs(fs); 04030 fp->flag &= (BYTE)~FA_MODIFIED; 04031 } 04032 } 04033 FREE_NAMBUF(); 04034 } 04035 } else 04036 #endif 04037 { 04038 res = move_window(fs, fp->dir_sect); 04039 if (res == FR_OK) { 04040 dir = fp->dir_ptr; 04041 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 04042 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */ 04043 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */ 04044 st_dword(dir + DIR_ModTime, tm); /* Update modified time */ 04045 st_word(dir + DIR_LstAccDate, 0); 04046 fs->wflag = 1; 04047 res = sync_fs(fs); /* Restore it to the directory */ 04048 fp->flag &= (BYTE)~FA_MODIFIED; 04049 } 04050 } 04051 } 04052 } 04053 04054 LEAVE_FF(fs, res); 04055 } 04056 04057 #endif /* !FF_FS_READONLY */ 04058 04059 04060 04061 04062 /*-----------------------------------------------------------------------*/ 04063 /* Close File */ 04064 /*-----------------------------------------------------------------------*/ 04065 04066 FRESULT f_close ( 04067 FIL* fp /* Pointer to the file object to be closed */ 04068 ) 04069 { 04070 FRESULT res; 04071 FATFS *fs; 04072 04073 #if !FF_FS_READONLY 04074 res = f_sync(fp); /* Flush cached data */ 04075 if (res == FR_OK) 04076 #endif 04077 { 04078 res = validate(&fp->obj, &fs); /* Lock volume */ 04079 if (res == FR_OK) { 04080 #if FF_FS_LOCK != 0 04081 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */ 04082 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */ 04083 #else 04084 fp->obj.fs = 0; /* Invalidate file object */ 04085 #endif 04086 #if FF_FS_REENTRANT 04087 unlock_fs(fs, FR_OK); /* Unlock volume */ 04088 #endif 04089 #if !FF_FS_TINY && FF_FS_HEAPBUF 04090 ff_memfree(fp->buf); /* Deallocate buffer */ 04091 #endif 04092 } 04093 } 04094 return res; 04095 } 04096 04097 04098 04099 04100 #if FF_FS_RPATH >= 1 04101 /*-----------------------------------------------------------------------*/ 04102 /* Change Current Directory or Current Drive, Get Current Directory */ 04103 /*-----------------------------------------------------------------------*/ 04104 04105 #if FF_VOLUMES >= 2 04106 FRESULT f_chdrive ( 04107 const TCHAR* path /* Drive number */ 04108 ) 04109 { 04110 int vol; 04111 04112 04113 /* Get logical drive number */ 04114 vol = get_ldnumber(&path); 04115 if (vol < 0) return FR_INVALID_DRIVE; 04116 04117 CurrVol = (BYTE)vol; /* Set it as current volume */ 04118 04119 return FR_OK; 04120 } 04121 #endif 04122 04123 04124 FRESULT f_chdir ( 04125 const TCHAR* path /* Pointer to the directory path */ 04126 ) 04127 { 04128 FRESULT res; 04129 FATFS_DIR dj; 04130 FATFS *fs; 04131 DEF_NAMBUF 04132 04133 /* Get logical drive */ 04134 res = find_volume(&path, &fs, 0); 04135 if (res == FR_OK) { 04136 dj.obj.fs = fs; 04137 INIT_NAMBUF(fs); 04138 res = follow_path(&dj, path); /* Follow the path */ 04139 if (res == FR_OK) { /* Follow completed */ 04140 if (dj.fn[NSFLAG] & NS_NONAME) { 04141 fs->cdir = dj.obj.sclust; /* It is the start directory itself */ 04142 #if FF_FS_EXFAT 04143 if (fs->fs_type == FS_EXFAT) { 04144 fs->cdc_scl = dj.obj.c_scl; 04145 fs->cdc_size = dj.obj.c_size; 04146 fs->cdc_ofs = dj.obj.c_ofs; 04147 } 04148 #endif 04149 } else { 04150 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */ 04151 #if FF_FS_EXFAT 04152 if (fs->fs_type == FS_EXFAT) { 04153 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */ 04154 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */ 04155 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 04156 fs->cdc_ofs = dj.blk_ofs; 04157 } else 04158 #endif 04159 { 04160 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */ 04161 } 04162 } else { 04163 res = FR_NO_PATH; /* Reached but a file */ 04164 } 04165 } 04166 } 04167 FREE_NAMBUF(); 04168 if (res == FR_NO_FILE) res = FR_NO_PATH; 04169 } 04170 04171 LEAVE_FF(fs, res); 04172 } 04173 04174 04175 #if FF_FS_RPATH >= 2 04176 FRESULT f_getcwd ( 04177 TCHAR* buff, /* Pointer to the directory path */ 04178 UINT len /* Size of path */ 04179 ) 04180 { 04181 FRESULT res; 04182 FATFS_DIR dj; 04183 FATFS *fs; 04184 UINT i, n; 04185 DWORD ccl; 04186 TCHAR *tp; 04187 FILINFO fno; 04188 DEF_NAMBUF 04189 04190 04191 *buff = 0; 04192 /* Get logical drive */ 04193 res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */ 04194 if (res == FR_OK) { 04195 dj.obj.fs = fs; 04196 INIT_NAMBUF(fs); 04197 i = len; /* Bottom of buffer (directory stack base) */ 04198 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */ 04199 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */ 04200 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 04201 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */ 04202 if (res != FR_OK) break; 04203 res = move_window(fs, dj.sect); 04204 if (res != FR_OK) break; 04205 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */ 04206 res = dir_sdi(&dj, 0); 04207 if (res != FR_OK) break; 04208 do { /* Find the entry links to the child directory */ 04209 res = dir_read_file(&dj); 04210 if (res != FR_OK) break; 04211 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */ 04212 res = dir_next(&dj, 0); 04213 } while (res == FR_OK); 04214 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 04215 if (res != FR_OK) break; 04216 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 04217 for (n = 0; fno.fname[n]; n++) ; 04218 if (i < n + 3) { 04219 res = FR_NOT_ENOUGH_CORE; break; 04220 } 04221 while (n) buff[--i] = fno.fname[--n]; 04222 buff[--i] = '/'; 04223 } 04224 } 04225 tp = buff; 04226 if (res == FR_OK) { 04227 #if FF_VOLUMES >= 2 04228 *tp++ = '0' + CurrVol; /* Put drive number */ 04229 *tp++ = ':'; 04230 #endif 04231 if (i == len) { /* Root-directory */ 04232 *tp++ = '/'; 04233 } else { /* Sub-directroy */ 04234 do /* Add stacked path str */ 04235 *tp++ = buff[i++]; 04236 while (i < len); 04237 } 04238 } 04239 *tp = 0; 04240 FREE_NAMBUF(); 04241 } 04242 04243 LEAVE_FF(fs, res); 04244 } 04245 04246 #endif /* FF_FS_RPATH >= 2 */ 04247 #endif /* FF_FS_RPATH >= 1 */ 04248 04249 04250 04251 #if FF_FS_MINIMIZE <= 2 04252 /*-----------------------------------------------------------------------*/ 04253 /* Seek File Read/Write Pointer */ 04254 /*-----------------------------------------------------------------------*/ 04255 04256 FRESULT f_lseek ( 04257 FIL* fp, /* Pointer to the file object */ 04258 FSIZE_t ofs /* File pointer from top of file */ 04259 ) 04260 { 04261 FRESULT res; 04262 FATFS *fs; 04263 DWORD clst, bcs, nsect; 04264 FSIZE_t ifptr; 04265 #if FF_USE_FASTSEEK 04266 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 04267 #endif 04268 04269 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 04270 if (res == FR_OK) res = (FRESULT)fp->err; 04271 #if FF_FS_EXFAT && !FF_FS_READONLY 04272 if (res == FR_OK && fs->fs_type == FS_EXFAT) { 04273 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 04274 } 04275 #endif 04276 if (res != FR_OK) LEAVE_FF(fs, res); 04277 04278 #if FF_USE_FASTSEEK 04279 if (fp->cltbl) { /* Fast seek */ 04280 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 04281 tbl = fp->cltbl; 04282 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 04283 cl = fp->obj.sclust; /* Origin of the chain */ 04284 if (cl != 0) { 04285 do { 04286 /* Get a fragment */ 04287 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 04288 do { 04289 pcl = cl; ncl++; 04290 cl = get_fat(&fp->obj, cl); 04291 if (cl <= 1) ABORT(fs, FR_INT_ERR); 04292 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04293 } while (cl == pcl + 1); 04294 if (ulen <= tlen) { /* Store the length and top of the fragment */ 04295 *tbl++ = ncl; *tbl++ = tcl; 04296 } 04297 } while (cl < fs->n_fatent); /* Repeat until end of chain */ 04298 } 04299 *fp->cltbl = ulen; /* Number of items used */ 04300 if (ulen <= tlen) { 04301 *tbl = 0; /* Terminate table */ 04302 } else { 04303 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 04304 } 04305 } else { /* Fast seek */ 04306 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */ 04307 fp->fptr = ofs; /* Set file pointer */ 04308 if (ofs > 0) { 04309 fp->clust = clmt_clust(fp, ofs - 1); 04310 dsc = clst2sect(fs, fp->clust); 04311 if (dsc == 0) ABORT(fs, FR_INT_ERR); 04312 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1); 04313 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */ 04314 #if !FF_FS_TINY 04315 #if !FF_FS_READONLY 04316 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 04317 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 04318 fp->flag &= (BYTE)~FA_DIRTY; 04319 } 04320 #endif 04321 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */ 04322 #endif 04323 fp->sect = dsc; 04324 } 04325 } 04326 } 04327 } else 04328 #endif 04329 04330 /* Normal Seek */ 04331 { 04332 #if FF_FS_EXFAT 04333 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */ 04334 #endif 04335 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */ 04336 ofs = fp->obj.objsize; 04337 } 04338 ifptr = fp->fptr; 04339 fp->fptr = nsect = 0; 04340 if (ofs > 0) { 04341 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */ 04342 if (ifptr > 0 && 04343 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 04344 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */ 04345 ofs -= fp->fptr; 04346 clst = fp->clust; 04347 } else { /* When seek to back cluster, */ 04348 clst = fp->obj.sclust; /* start from the first cluster */ 04349 #if !FF_FS_READONLY 04350 if (clst == 0) { /* If no cluster chain, create a new chain */ 04351 clst = create_chain(&fp->obj, 0); 04352 if (clst == 1) ABORT(fs, FR_INT_ERR); 04353 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04354 fp->obj.sclust = clst; 04355 } 04356 #endif 04357 fp->clust = clst; 04358 } 04359 if (clst != 0) { 04360 while (ofs > bcs) { /* Cluster following loop */ 04361 ofs -= bcs; fp->fptr += bcs; 04362 #if !FF_FS_READONLY 04363 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 04364 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */ 04365 fp->obj.objsize = fp->fptr; 04366 fp->flag |= FA_MODIFIED; 04367 } 04368 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */ 04369 if (clst == 0) { /* Clip file size in case of disk full */ 04370 ofs = 0; break; 04371 } 04372 } else 04373 #endif 04374 { 04375 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */ 04376 } 04377 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04378 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR); 04379 fp->clust = clst; 04380 } 04381 fp->fptr += ofs; 04382 if (ofs % SS(fs)) { 04383 nsect = clst2sect(fs, clst); /* Current sector */ 04384 if (nsect == 0) ABORT(fs, FR_INT_ERR); 04385 nsect += (DWORD)(ofs / SS(fs)); 04386 } 04387 } 04388 } 04389 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */ 04390 fp->obj.objsize = fp->fptr; 04391 fp->flag |= FA_MODIFIED; 04392 } 04393 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */ 04394 #if !FF_FS_TINY 04395 #if !FF_FS_READONLY 04396 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 04397 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 04398 fp->flag &= (BYTE)~FA_DIRTY; 04399 } 04400 #endif 04401 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 04402 #endif 04403 fp->sect = nsect; 04404 } 04405 } 04406 04407 LEAVE_FF(fs, res); 04408 } 04409 04410 04411 04412 #if FF_FS_MINIMIZE <= 1 04413 /*-----------------------------------------------------------------------*/ 04414 /* Create a Directory Object */ 04415 /*-----------------------------------------------------------------------*/ 04416 04417 FRESULT f_opendir ( 04418 FATFS_DIR* dp, /* Pointer to directory object to create */ 04419 const TCHAR* path /* Pointer to the directory path */ 04420 ) 04421 { 04422 FRESULT res; 04423 FATFS *fs; 04424 DEF_NAMBUF 04425 04426 04427 if (!dp) return FR_INVALID_OBJECT; 04428 04429 /* Get logical drive */ 04430 res = find_volume(&path, &fs, 0); 04431 if (res == FR_OK) { 04432 dp->obj.fs = fs; 04433 INIT_NAMBUF(fs); 04434 res = follow_path(dp, path); /* Follow the path to the directory */ 04435 if (res == FR_OK) { /* Follow completed */ 04436 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */ 04437 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */ 04438 #if FF_FS_EXFAT 04439 if (fs->fs_type == FS_EXFAT) { 04440 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */ 04441 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 04442 dp->obj.c_ofs = dp->blk_ofs; 04443 init_alloc_info(fs, &dp->obj); /* Get object allocation info */ 04444 } else 04445 #endif 04446 { 04447 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */ 04448 } 04449 } else { /* This object is a file */ 04450 res = FR_NO_PATH; 04451 } 04452 } 04453 if (res == FR_OK) { 04454 dp->obj.id = fs->id; 04455 res = dir_sdi(dp, 0); /* Rewind directory */ 04456 #if FF_FS_LOCK != 0 04457 if (res == FR_OK) { 04458 if (dp->obj.sclust != 0) { 04459 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */ 04460 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES; 04461 } else { 04462 dp->obj.lockid = 0; /* Root directory need not to be locked */ 04463 } 04464 } 04465 #endif 04466 } 04467 } 04468 FREE_NAMBUF(); 04469 if (res == FR_NO_FILE) res = FR_NO_PATH; 04470 } 04471 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */ 04472 04473 LEAVE_FF(fs, res); 04474 } 04475 04476 04477 04478 04479 /*-----------------------------------------------------------------------*/ 04480 /* Close Directory */ 04481 /*-----------------------------------------------------------------------*/ 04482 04483 FRESULT f_closedir ( 04484 FATFS_DIR *dp /* Pointer to the directory object to be closed */ 04485 ) 04486 { 04487 FRESULT res; 04488 FATFS *fs; 04489 04490 04491 res = validate(&dp->obj, &fs); /* Check validity of the file object */ 04492 if (res == FR_OK) { 04493 #if FF_FS_LOCK != 0 04494 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */ 04495 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */ 04496 #else 04497 dp->obj.fs = 0; /* Invalidate directory object */ 04498 #endif 04499 #if FF_FS_REENTRANT 04500 unlock_fs(fs, FR_OK); /* Unlock volume */ 04501 #endif 04502 } 04503 return res; 04504 } 04505 04506 04507 04508 04509 /*-----------------------------------------------------------------------*/ 04510 /* Read Directory Entries in Sequence */ 04511 /*-----------------------------------------------------------------------*/ 04512 04513 FRESULT f_readdir ( 04514 FATFS_DIR* dp, /* Pointer to the open directory object */ 04515 FILINFO* fno /* Pointer to file information to return */ 04516 ) 04517 { 04518 FRESULT res; 04519 FATFS *fs; 04520 DEF_NAMBUF 04521 04522 04523 res = validate(&dp->obj, &fs); /* Check validity of the directory object */ 04524 if (res == FR_OK) { 04525 if (!fno) { 04526 res = dir_sdi(dp, 0); /* Rewind the directory object */ 04527 } else { 04528 INIT_NAMBUF(fs); 04529 res = dir_read_file(dp); /* Read an item */ 04530 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */ 04531 if (res == FR_OK) { /* A valid entry is found */ 04532 get_fileinfo(dp, fno); /* Get the object information */ 04533 res = dir_next(dp, 0); /* Increment index for next */ 04534 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */ 04535 } 04536 FREE_NAMBUF(); 04537 } 04538 } 04539 LEAVE_FF(fs, res); 04540 } 04541 04542 04543 04544 #if FF_USE_FIND 04545 /*-----------------------------------------------------------------------*/ 04546 /* Find Next File */ 04547 /*-----------------------------------------------------------------------*/ 04548 04549 FRESULT f_findnext ( 04550 FATFS_DIR* dp, /* Pointer to the open directory object */ 04551 FILINFO* fno /* Pointer to the file information structure */ 04552 ) 04553 { 04554 FRESULT res; 04555 04556 04557 for (;;) { 04558 res = f_readdir(dp, fno); /* Get a directory item */ 04559 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 04560 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */ 04561 #if FF_USE_LFN && FF_USE_FIND == 2 04562 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */ 04563 #endif 04564 } 04565 return res; 04566 } 04567 04568 04569 04570 /*-----------------------------------------------------------------------*/ 04571 /* Find First File */ 04572 /*-----------------------------------------------------------------------*/ 04573 04574 FRESULT f_findfirst ( 04575 FATFS_DIR* dp, /* Pointer to the blank directory object */ 04576 FILINFO* fno, /* Pointer to the file information structure */ 04577 const TCHAR* path, /* Pointer to the directory to open */ 04578 const TCHAR* pattern /* Pointer to the matching pattern */ 04579 ) 04580 { 04581 FRESULT res; 04582 04583 04584 dp->pat = pattern; /* Save pointer to pattern string */ 04585 res = f_opendir(dp, path); /* Open the target directory */ 04586 if (res == FR_OK) { 04587 res = f_findnext(dp, fno); /* Find the first item */ 04588 } 04589 return res; 04590 } 04591 04592 #endif /* FF_USE_FIND */ 04593 04594 04595 04596 #if FF_FS_MINIMIZE == 0 04597 /*-----------------------------------------------------------------------*/ 04598 /* Get File Status */ 04599 /*-----------------------------------------------------------------------*/ 04600 04601 FRESULT f_stat ( 04602 const TCHAR* path, /* Pointer to the file path */ 04603 FILINFO* fno /* Pointer to file information to return */ 04604 ) 04605 { 04606 FRESULT res; 04607 FATFS_DIR dj; 04608 DEF_NAMBUF 04609 04610 04611 /* Get logical drive */ 04612 res = find_volume(&path, &dj.obj.fs, 0); 04613 if (res == FR_OK) { 04614 INIT_NAMBUF(dj.obj.fs); 04615 res = follow_path(&dj, path); /* Follow the file path */ 04616 if (res == FR_OK) { /* Follow completed */ 04617 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */ 04618 res = FR_INVALID_NAME; 04619 } else { /* Found an object */ 04620 if (fno) get_fileinfo(&dj, fno); 04621 } 04622 } 04623 FREE_NAMBUF(); 04624 } 04625 04626 LEAVE_FF(dj.obj.fs, res); 04627 } 04628 04629 04630 04631 #if !FF_FS_READONLY 04632 /*-----------------------------------------------------------------------*/ 04633 /* Get Number of Free Clusters */ 04634 /*-----------------------------------------------------------------------*/ 04635 04636 FRESULT f_getfree ( 04637 const TCHAR* path, /* Logical drive number */ 04638 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 04639 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */ 04640 ) 04641 { 04642 FRESULT res; 04643 FATFS *fs; 04644 DWORD nfree, clst, sect, stat; 04645 UINT i; 04646 FFOBJID obj; 04647 04648 04649 /* Get logical drive */ 04650 res = find_volume(&path, &fs, 0); 04651 if (res == FR_OK) { 04652 *fatfs = fs; /* Return ptr to the fs object */ 04653 /* If free_clst is valid, return it without full FAT scan */ 04654 if (fs->free_clst <= fs->n_fatent - 2) { 04655 *nclst = fs->free_clst; 04656 } else { 04657 /* Scan FAT to obtain number of free clusters */ 04658 nfree = 0; 04659 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */ 04660 clst = 2; obj.fs = fs; 04661 do { 04662 stat = get_fat(&obj, clst); 04663 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 04664 if (stat == 1) { res = FR_INT_ERR; break; } 04665 if (stat == 0) nfree++; 04666 } while (++clst < fs->n_fatent); 04667 } else { 04668 #if FF_FS_EXFAT 04669 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */ 04670 BYTE bm; 04671 UINT b; 04672 04673 clst = fs->n_fatent - 2; /* Number of clusters */ 04674 sect = fs->database; /* Assuming bitmap starts at cluster 2 */ 04675 i = 0; /* Offset in the sector */ 04676 do { /* Counts numbuer of bits with zero in the bitmap */ 04677 if (i == 0) { 04678 res = move_window(fs, sect++); 04679 if (res != FR_OK) break; 04680 } 04681 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) { 04682 if (!(bm & 1)) nfree++; 04683 bm >>= 1; 04684 } 04685 i = (i + 1) % SS(fs); 04686 } while (clst); 04687 } else 04688 #endif 04689 { /* FAT16/32: Scan WORD/DWORD FAT entries */ 04690 clst = fs->n_fatent; /* Number of entries */ 04691 sect = fs->fatbase; /* Top of the FAT */ 04692 i = 0; /* Offset in the sector */ 04693 do { /* Counts numbuer of entries with zero in the FAT */ 04694 if (i == 0) { 04695 res = move_window(fs, sect++); 04696 if (res != FR_OK) break; 04697 } 04698 if (fs->fs_type == FS_FAT16) { 04699 if (ld_word(fs->win + i) == 0) nfree++; 04700 i += 2; 04701 } else { 04702 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++; 04703 i += 4; 04704 } 04705 i %= SS(fs); 04706 } while (--clst); 04707 } 04708 } 04709 *nclst = nfree; /* Return the free clusters */ 04710 fs->free_clst = nfree; /* Now free_clst is valid */ 04711 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */ 04712 } 04713 } 04714 04715 LEAVE_FF(fs, res); 04716 } 04717 04718 04719 04720 04721 /*-----------------------------------------------------------------------*/ 04722 /* Truncate File */ 04723 /*-----------------------------------------------------------------------*/ 04724 04725 FRESULT f_truncate ( 04726 FIL* fp /* Pointer to the file object */ 04727 ) 04728 { 04729 FRESULT res; 04730 FATFS *fs; 04731 DWORD ncl; 04732 04733 04734 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 04735 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 04736 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 04737 04738 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */ 04739 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 04740 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 04741 fp->obj.sclust = 0; 04742 } else { /* When truncate a part of the file, remove remaining clusters */ 04743 ncl = get_fat(&fp->obj, fp->clust); 04744 res = FR_OK; 04745 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 04746 if (ncl == 1) res = FR_INT_ERR; 04747 if (res == FR_OK && ncl < fs->n_fatent) { 04748 res = remove_chain(&fp->obj, ncl, fp->clust); 04749 } 04750 } 04751 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */ 04752 fp->flag |= FA_MODIFIED; 04753 #if !FF_FS_TINY 04754 if (res == FR_OK && (fp->flag & FA_DIRTY)) { 04755 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) { 04756 res = FR_DISK_ERR; 04757 } else { 04758 fp->flag &= (BYTE)~FA_DIRTY; 04759 } 04760 } 04761 #endif 04762 if (res != FR_OK) ABORT(fs, res); 04763 } 04764 04765 LEAVE_FF(fs, res); 04766 } 04767 04768 04769 04770 04771 /*-----------------------------------------------------------------------*/ 04772 /* Delete a File/Directory */ 04773 /*-----------------------------------------------------------------------*/ 04774 04775 FRESULT f_unlink ( 04776 const TCHAR* path /* Pointer to the file or directory path */ 04777 ) 04778 { 04779 FRESULT res; 04780 FATFS_DIR dj, sdj; 04781 DWORD dclst = 0; 04782 FATFS *fs; 04783 #if FF_FS_EXFAT 04784 FFOBJID obj; 04785 #endif 04786 DEF_NAMBUF 04787 04788 04789 /* Get logical drive */ 04790 res = find_volume(&path, &fs, FA_WRITE); 04791 if (res == FR_OK) { 04792 dj.obj.fs = fs; 04793 INIT_NAMBUF(fs); 04794 res = follow_path(&dj, path); /* Follow the file path */ 04795 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) { 04796 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 04797 } 04798 #if FF_FS_LOCK != 0 04799 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */ 04800 #endif 04801 if (res == FR_OK) { /* The object is accessible */ 04802 if (dj.fn[NSFLAG] & NS_NONAME) { 04803 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 04804 } else { 04805 if (dj.obj.attr & AM_RDO) { 04806 res = FR_DENIED; /* Cannot remove R/O object */ 04807 } 04808 } 04809 if (res == FR_OK) { 04810 #if FF_FS_EXFAT 04811 obj.fs = fs; 04812 if (fs->fs_type == FS_EXFAT) { 04813 init_alloc_info(fs, &obj); 04814 dclst = obj.sclust; 04815 } else 04816 #endif 04817 { 04818 dclst = ld_clust(fs, dj.dir); 04819 } 04820 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */ 04821 #if FF_FS_RPATH != 0 04822 if (dclst == fs->cdir) { /* Is it the current directory? */ 04823 res = FR_DENIED; 04824 } else 04825 #endif 04826 { 04827 sdj.obj.fs = fs; /* Open the sub-directory */ 04828 sdj.obj.sclust = dclst; 04829 #if FF_FS_EXFAT 04830 if (fs->fs_type == FS_EXFAT) { 04831 sdj.obj.objsize = obj.objsize; 04832 sdj.obj.stat = obj.stat; 04833 } 04834 #endif 04835 res = dir_sdi(&sdj, 0); 04836 if (res == FR_OK) { 04837 res = dir_read_file(&sdj); /* Test if the directory is empty */ 04838 if (res == FR_OK) res = FR_DENIED; /* Not empty? */ 04839 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */ 04840 } 04841 } 04842 } 04843 } 04844 if (res == FR_OK) { 04845 res = dir_remove(&dj); /* Remove the directory entry */ 04846 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */ 04847 #if FF_FS_EXFAT 04848 res = remove_chain(&obj, dclst, 0); 04849 #else 04850 res = remove_chain(&dj.obj, dclst, 0); 04851 #endif 04852 } 04853 if (res == FR_OK) res = sync_fs(fs); 04854 } 04855 } 04856 FREE_NAMBUF(); 04857 } 04858 04859 LEAVE_FF(fs, res); 04860 } 04861 04862 04863 04864 04865 /*-----------------------------------------------------------------------*/ 04866 /* Create a Directory */ 04867 /*-----------------------------------------------------------------------*/ 04868 04869 FRESULT f_mkdir ( 04870 const TCHAR* path /* Pointer to the directory path */ 04871 ) 04872 { 04873 FRESULT res; 04874 FATFS_DIR dj; 04875 FATFS *fs; 04876 BYTE *dir; 04877 DWORD dcl, pcl, tm; 04878 DEF_NAMBUF 04879 04880 04881 /* Get logical drive */ 04882 res = find_volume(&path, &fs, FA_WRITE); 04883 if (res == FR_OK) { 04884 dj.obj.fs = fs; 04885 INIT_NAMBUF(fs); 04886 res = follow_path(&dj, path); /* Follow the file path */ 04887 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 04888 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { 04889 res = FR_INVALID_NAME; 04890 } 04891 if (res == FR_NO_FILE) { /* Can create a new directory */ 04892 dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */ 04893 dj.obj.objsize = (DWORD)fs->csize * SS(fs); 04894 res = FR_OK; 04895 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 04896 if (dcl == 1) res = FR_INT_ERR; 04897 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 04898 if (res == FR_OK) res = sync_window(fs); /* Flush FAT */ 04899 tm = GET_FATTIME(); 04900 if (res == FR_OK) { /* Initialize the new directory table */ 04901 res = dir_clear(fs, dcl); /* Clean up the new table */ 04902 if (res == FR_OK && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT)) { /* Create dot entries (FAT only) */ 04903 dir = fs->win; 04904 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ 04905 dir[DIR_Name] = '.'; 04906 dir[DIR_Attr] = AM_DIR; 04907 st_dword(dir + DIR_ModTime, tm); 04908 st_clust(fs, dir, dcl); 04909 mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */ 04910 dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust; 04911 st_clust(fs, dir + SZDIRE, pcl); 04912 fs->wflag = 1; 04913 } 04914 } 04915 if (res == FR_OK) { 04916 res = dir_register(&dj); /* Register the object to the directoy */ 04917 } 04918 if (res == FR_OK) { 04919 #if FF_FS_EXFAT 04920 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */ 04921 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */ 04922 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */ 04923 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */ 04924 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize); 04925 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */ 04926 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */ 04927 res = store_xdir(&dj); 04928 } else 04929 #endif 04930 { 04931 dir = dj.dir; 04932 st_dword(dir + DIR_ModTime, tm); /* Created time */ 04933 st_clust(fs, dir, dcl); /* Table start cluster */ 04934 dir[DIR_Attr] = AM_DIR; /* Attribute */ 04935 fs->wflag = 1; 04936 } 04937 if (res == FR_OK) { 04938 res = sync_fs(fs); 04939 } 04940 } else { 04941 remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */ 04942 } 04943 } 04944 FREE_NAMBUF(); 04945 } 04946 04947 LEAVE_FF(fs, res); 04948 } 04949 04950 04951 04952 04953 /*-----------------------------------------------------------------------*/ 04954 /* Rename a File/Directory */ 04955 /*-----------------------------------------------------------------------*/ 04956 04957 FRESULT f_rename ( 04958 const TCHAR* path_old, /* Pointer to the object name to be renamed */ 04959 const TCHAR* path_new /* Pointer to the new name */ 04960 ) 04961 { 04962 FRESULT res; 04963 FATFS_DIR djo, djn; 04964 FATFS *fs; 04965 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir; 04966 DWORD dw; 04967 DEF_NAMBUF 04968 04969 04970 get_ldnumber(&path_new); /* Snip the drive number of new name off */ 04971 res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */ 04972 if (res == FR_OK) { 04973 djo.obj.fs = fs; 04974 INIT_NAMBUF(fs); 04975 res = follow_path(&djo, path_old); /* Check old object */ 04976 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */ 04977 #if FF_FS_LOCK != 0 04978 if (res == FR_OK) { 04979 res = chk_lock(&djo, 2); 04980 } 04981 #endif 04982 if (res == FR_OK) { /* Object to be renamed is found */ 04983 #if FF_FS_EXFAT 04984 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */ 04985 BYTE nf, nn; 04986 WORD nh; 04987 04988 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */ 04989 mem_cpy(&djn, &djo, sizeof djo); 04990 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 04991 if (res == FR_OK) { /* Is new name already in use by any other object? */ 04992 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 04993 } 04994 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 04995 res = dir_register(&djn); /* Register the new entry */ 04996 if (res == FR_OK) { 04997 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName]; 04998 nh = ld_word(fs->dirbuf + XDIR_NameHash); 04999 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */ 05000 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn; 05001 st_word(fs->dirbuf + XDIR_NameHash, nh); 05002 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 05003 /* Start of critical section where an interruption can cause a cross-link */ 05004 res = store_xdir(&djn); 05005 } 05006 } 05007 } else 05008 #endif 05009 { /* At FAT/FAT32 volume */ 05010 mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */ 05011 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */ 05012 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 05013 if (res == FR_OK) { /* Is new name already in use by any other object? */ 05014 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 05015 } 05016 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 05017 res = dir_register(&djn); /* Register the new entry */ 05018 if (res == FR_OK) { 05019 dir = djn.dir; /* Copy directory entry of the object except name */ 05020 mem_cpy(dir + 13, buf + 13, SZDIRE - 13); 05021 dir[DIR_Attr] = buf[DIR_Attr]; 05022 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 05023 fs->wflag = 1; 05024 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */ 05025 dw = clst2sect(fs, ld_clust(fs, dir)); 05026 if (dw == 0) { 05027 res = FR_INT_ERR; 05028 } else { 05029 /* Start of critical section where an interruption can cause a cross-link */ 05030 res = move_window(fs, dw); 05031 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */ 05032 if (res == FR_OK && dir[1] == '.') { 05033 st_clust(fs, dir, djn.obj.sclust); 05034 fs->wflag = 1; 05035 } 05036 } 05037 } 05038 } 05039 } 05040 } 05041 if (res == FR_OK) { 05042 res = dir_remove(&djo); /* Remove old entry */ 05043 if (res == FR_OK) { 05044 res = sync_fs(fs); 05045 } 05046 } 05047 /* End of the critical section */ 05048 } 05049 FREE_NAMBUF(); 05050 } 05051 05052 LEAVE_FF(fs, res); 05053 } 05054 05055 #endif /* !FF_FS_READONLY */ 05056 #endif /* FF_FS_MINIMIZE == 0 */ 05057 #endif /* FF_FS_MINIMIZE <= 1 */ 05058 #endif /* FF_FS_MINIMIZE <= 2 */ 05059 05060 05061 05062 #if FF_USE_CHMOD && !FF_FS_READONLY 05063 /*-----------------------------------------------------------------------*/ 05064 /* Change Attribute */ 05065 /*-----------------------------------------------------------------------*/ 05066 05067 FRESULT f_chmod ( 05068 const TCHAR* path, /* Pointer to the file path */ 05069 BYTE attr, /* Attribute bits */ 05070 BYTE mask /* Attribute mask to change */ 05071 ) 05072 { 05073 FRESULT res; 05074 FATFS_DIR dj; 05075 FATFS *fs; 05076 DEF_NAMBUF 05077 05078 05079 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 05080 if (res == FR_OK) { 05081 dj.obj.fs = fs; 05082 INIT_NAMBUF(fs); 05083 res = follow_path(&dj, path); /* Follow the file path */ 05084 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 05085 if (res == FR_OK) { 05086 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 05087 #if FF_FS_EXFAT 05088 if (fs->fs_type == FS_EXFAT) { 05089 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 05090 res = store_xdir(&dj); 05091 } else 05092 #endif 05093 { 05094 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 05095 fs->wflag = 1; 05096 } 05097 if (res == FR_OK) { 05098 res = sync_fs(fs); 05099 } 05100 } 05101 FREE_NAMBUF(); 05102 } 05103 05104 LEAVE_FF(fs, res); 05105 } 05106 05107 05108 05109 05110 /*-----------------------------------------------------------------------*/ 05111 /* Change Timestamp */ 05112 /*-----------------------------------------------------------------------*/ 05113 05114 FRESULT f_utime ( 05115 const TCHAR* path, /* Pointer to the file/directory name */ 05116 const FILINFO* fno /* Pointer to the timestamp to be set */ 05117 ) 05118 { 05119 FRESULT res; 05120 FATFS_DIR dj; 05121 FATFS *fs; 05122 DEF_NAMBUF 05123 05124 05125 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 05126 if (res == FR_OK) { 05127 dj.obj.fs = fs; 05128 INIT_NAMBUF(fs); 05129 res = follow_path(&dj, path); /* Follow the file path */ 05130 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 05131 if (res == FR_OK) { 05132 #if FF_FS_EXFAT 05133 if (fs->fs_type == FS_EXFAT) { 05134 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 05135 res = store_xdir(&dj); 05136 } else 05137 #endif 05138 { 05139 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 05140 fs->wflag = 1; 05141 } 05142 if (res == FR_OK) { 05143 res = sync_fs(fs); 05144 } 05145 } 05146 FREE_NAMBUF(); 05147 } 05148 05149 LEAVE_FF(fs, res); 05150 } 05151 05152 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */ 05153 05154 05155 05156 #if FF_USE_LABEL 05157 /*-----------------------------------------------------------------------*/ 05158 /* Get Volume Label */ 05159 /*-----------------------------------------------------------------------*/ 05160 05161 FRESULT f_getlabel ( 05162 const TCHAR* path, /* Logical drive number */ 05163 TCHAR* label, /* Buffer to store the volume label */ 05164 DWORD* vsn /* Variable to store the volume serial number */ 05165 ) 05166 { 05167 FRESULT res; 05168 FATFS_DIR dj; 05169 FATFS *fs; 05170 UINT si, di; 05171 WCHAR wc; 05172 05173 /* Get logical drive */ 05174 res = find_volume(&path, &fs, 0); 05175 05176 /* Get volume label */ 05177 if (res == FR_OK && label) { 05178 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 05179 res = dir_sdi(&dj, 0); 05180 if (res == FR_OK) { 05181 res = dir_read_label(&dj); /* Find a volume label entry */ 05182 if (res == FR_OK) { 05183 #if FF_FS_EXFAT 05184 if (fs->fs_type == FS_EXFAT) { 05185 WCHAR hs; 05186 05187 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */ 05188 wc = ld_word(dj.dir + XDIR_Label + si * 2); 05189 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */ 05190 hs = wc; continue; 05191 } 05192 wc = put_utf((DWORD)hs << 16 | wc, &label[di], 4); 05193 if (wc == 0) { di = 0; break; } 05194 di += wc; 05195 hs = 0; 05196 } 05197 if (hs != 0) di = 0; /* Broken surrogate pair? */ 05198 label[di] = 0; 05199 } else 05200 #endif 05201 { 05202 si = di = 0; /* Extract volume label from AM_VOL entry */ 05203 while (si < 11) { 05204 wc = dj.dir[si++]; 05205 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */ 05206 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */ 05207 wc = ff_oem2uni(wc, CODEPAGE); 05208 if (wc != 0) wc = put_utf(wc, &label[di], 4); 05209 if (wc == 0) { di = 0; break; } 05210 di += wc; 05211 #else /* ANSI/OEM output */ 05212 label[di++] = (TCHAR)wc; 05213 #endif 05214 } 05215 do { /* Truncate trailing spaces */ 05216 label[di] = 0; 05217 if (di == 0) break; 05218 } while (label[--di] == ' '); 05219 } 05220 } 05221 } 05222 if (res == FR_NO_FILE) { /* No label entry and return nul string */ 05223 label[0] = 0; 05224 res = FR_OK; 05225 } 05226 } 05227 05228 /* Get volume serial number */ 05229 if (res == FR_OK && vsn) { 05230 res = move_window(fs, fs->volbase); 05231 if (res == FR_OK) { 05232 switch (fs->fs_type) { 05233 case FS_EXFAT: 05234 di = BPB_VolIDEx; break; 05235 05236 case FS_FAT32: 05237 di = BS_VolID32; break; 05238 05239 default: 05240 di = BS_VolID; 05241 } 05242 *vsn = ld_dword(fs->win + di); 05243 } 05244 } 05245 05246 LEAVE_FF(fs, res); 05247 } 05248 05249 05250 05251 #if !FF_FS_READONLY 05252 /*-----------------------------------------------------------------------*/ 05253 /* Set Volume Label */ 05254 /*-----------------------------------------------------------------------*/ 05255 05256 FRESULT f_setlabel ( 05257 const TCHAR* label /* Volume label to set with heading logical drive number */ 05258 ) 05259 { 05260 FRESULT res; 05261 FATFS_DIR dj; 05262 FATFS *fs; 05263 BYTE dirvn[22]; 05264 UINT di; 05265 WCHAR wc; 05266 static const char badchr[] = "+.,;=[]\"*:<>\?|\x7F"; /* [0..] for FAT, [7..] for exFAT */ 05267 #if FF_USE_LFN 05268 DWORD dc; 05269 #endif 05270 05271 /* Get logical drive */ 05272 res = find_volume(&label, &fs, FA_WRITE); 05273 if (res != FR_OK) LEAVE_FF(fs, res); 05274 05275 #if FF_FS_EXFAT 05276 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 05277 mem_set(dirvn, 0, 22); 05278 di = 0; 05279 while (*label) { /* Create volume label in directory form */ 05280 dc = tchar2uni(&label); /* Get a Unicode character */ 05281 if (dc >= 0x10000) { 05282 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */ 05283 dc = 0; 05284 } else { 05285 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++; 05286 } 05287 } 05288 if (dc == 0 || chk_chr(badchr + 7, (int)dc) || di >= 11) { /* Check validity of the volume label */ 05289 LEAVE_FF(fs, FR_INVALID_NAME); 05290 } 05291 st_word(dirvn + di * 2, (WCHAR)dc); di++; 05292 } 05293 } else 05294 #endif 05295 { /* On the FAT/FAT32 volume */ 05296 mem_set(dirvn, ' ', 11); 05297 di = 0; 05298 while (*label) { /* Create volume label in directory form */ 05299 #if FF_USE_LFN 05300 dc = tchar2uni(&label); 05301 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0; 05302 #else /* ANSI/OEM input */ 05303 wc = (BYTE)*label++; 05304 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0; 05305 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */ 05306 #if FF_CODE_PAGE == 0 05307 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 05308 #elif FF_CODE_PAGE < 900 05309 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 05310 #endif 05311 #endif 05312 if (wc == 0 || chk_chr(badchr + 0, (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */ 05313 LEAVE_FF(fs, FR_INVALID_NAME); 05314 } 05315 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8); 05316 dirvn[di++] = (BYTE)wc; 05317 } 05318 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 05319 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */ 05320 } 05321 05322 /* Set volume label */ 05323 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 05324 res = dir_sdi(&dj, 0); 05325 if (res == FR_OK) { 05326 res = dir_read_label(&dj); /* Get volume label entry */ 05327 if (res == FR_OK) { 05328 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 05329 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */ 05330 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 05331 } else { 05332 if (di != 0) { 05333 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */ 05334 } else { 05335 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */ 05336 } 05337 } 05338 fs->wflag = 1; 05339 res = sync_fs(fs); 05340 } else { /* No volume label entry or an error */ 05341 if (res == FR_NO_FILE) { 05342 res = FR_OK; 05343 if (di != 0) { /* Create a volume label entry */ 05344 res = dir_alloc(&dj, 1); /* Allocate an entry */ 05345 if (res == FR_OK) { 05346 mem_set(dj.dir, 0, SZDIRE); /* Clean the entry */ 05347 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 05348 dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */ 05349 dj.dir[XDIR_NumLabel] = (BYTE)di; 05350 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 05351 } else { 05352 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */ 05353 mem_cpy(dj.dir, dirvn, 11); 05354 } 05355 fs->wflag = 1; 05356 res = sync_fs(fs); 05357 } 05358 } 05359 } 05360 } 05361 } 05362 05363 LEAVE_FF(fs, res); 05364 } 05365 05366 #endif /* !FF_FS_READONLY */ 05367 #endif /* FF_USE_LABEL */ 05368 05369 05370 05371 #if FF_USE_EXPAND && !FF_FS_READONLY 05372 /*-----------------------------------------------------------------------*/ 05373 /* Allocate a Contiguous Blocks to the File */ 05374 /*-----------------------------------------------------------------------*/ 05375 05376 FRESULT f_expand ( 05377 FIL* fp, /* Pointer to the file object */ 05378 FSIZE_t fsz, /* File size to be expanded to */ 05379 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */ 05380 ) 05381 { 05382 FRESULT res; 05383 FATFS *fs; 05384 DWORD n, clst, stcl, scl, ncl, tcl, lclst; 05385 05386 05387 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 05388 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 05389 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); 05390 #if FF_FS_EXFAT 05391 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */ 05392 #endif 05393 n = (DWORD)fs->csize * SS(fs); /* Cluster size */ 05394 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */ 05395 stcl = fs->last_clst; lclst = 0; 05396 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2; 05397 05398 #if FF_FS_EXFAT 05399 if (fs->fs_type == FS_EXFAT) { 05400 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */ 05401 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */ 05402 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR; 05403 if (res == FR_OK) { /* A contiguous free area is found */ 05404 if (opt) { /* Allocate it now */ 05405 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */ 05406 lclst = scl + tcl - 1; 05407 } else { /* Set it as suggested point for next allocation */ 05408 lclst = scl - 1; 05409 } 05410 } 05411 } else 05412 #endif 05413 { 05414 scl = clst = stcl; ncl = 0; 05415 for (;;) { /* Find a contiguous cluster block */ 05416 n = get_fat(&fp->obj, clst); 05417 if (++clst >= fs->n_fatent) clst = 2; 05418 if (n == 1) { res = FR_INT_ERR; break; } 05419 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 05420 if (n == 0) { /* Is it a free cluster? */ 05421 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */ 05422 } else { 05423 scl = clst; ncl = 0; /* Not a free cluster */ 05424 } 05425 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */ 05426 } 05427 if (res == FR_OK) { /* A contiguous free area is found */ 05428 if (opt) { /* Allocate it now */ 05429 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */ 05430 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1); 05431 if (res != FR_OK) break; 05432 lclst = clst; 05433 } 05434 } else { /* Set it as suggested point for next allocation */ 05435 lclst = scl - 1; 05436 } 05437 } 05438 } 05439 05440 if (res == FR_OK) { 05441 fs->last_clst = lclst; /* Set suggested start cluster to start next */ 05442 if (opt) { /* Is it allocated now? */ 05443 fp->obj.sclust = scl; /* Update object allocation information */ 05444 fp->obj.objsize = fsz; 05445 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */ 05446 fp->flag |= FA_MODIFIED; 05447 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */ 05448 fs->free_clst -= tcl; 05449 fs->fsi_flag |= 1; 05450 } 05451 } 05452 } 05453 05454 LEAVE_FF(fs, res); 05455 } 05456 05457 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */ 05458 05459 05460 05461 #if FF_USE_FORWARD 05462 /*-----------------------------------------------------------------------*/ 05463 /* Forward Data to the Stream Directly */ 05464 /*-----------------------------------------------------------------------*/ 05465 05466 FRESULT f_forward ( 05467 FIL* fp, /* Pointer to the file object */ 05468 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 05469 UINT btf, /* Number of bytes to forward */ 05470 UINT* bf /* Pointer to number of bytes forwarded */ 05471 ) 05472 { 05473 FRESULT res; 05474 FATFS *fs; 05475 DWORD clst, sect; 05476 FSIZE_t remain; 05477 UINT rcnt, csect; 05478 BYTE *dbuf; 05479 05480 05481 *bf = 0; /* Clear transfer byte counter */ 05482 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 05483 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 05484 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 05485 05486 remain = fp->obj.objsize - fp->fptr; 05487 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 05488 05489 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */ 05490 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 05491 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 05492 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 05493 if (csect == 0) { /* On the cluster boundary? */ 05494 clst = (fp->fptr == 0) ? /* On the top of the file? */ 05495 fp->obj.sclust : get_fat(&fp->obj, fp->clust); 05496 if (clst <= 1) ABORT(fs, FR_INT_ERR); 05497 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 05498 fp->clust = clst; /* Update current cluster */ 05499 } 05500 } 05501 sect = clst2sect(fs, fp->clust); /* Get current data sector */ 05502 if (sect == 0) ABORT(fs, FR_INT_ERR); 05503 sect += csect; 05504 #if FF_FS_TINY 05505 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */ 05506 dbuf = fs->win; 05507 #else 05508 if (fp->sect != sect) { /* Fill sector cache with file data */ 05509 #if !FF_FS_READONLY 05510 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 05511 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 05512 fp->flag &= (BYTE)~FA_DIRTY; 05513 } 05514 #endif 05515 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 05516 } 05517 dbuf = fp->buf; 05518 #endif 05519 fp->sect = sect; 05520 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 05521 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */ 05522 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */ 05523 if (rcnt == 0) ABORT(fs, FR_INT_ERR); 05524 } 05525 05526 LEAVE_FF(fs, FR_OK); 05527 } 05528 #endif /* FF_USE_FORWARD */ 05529 05530 05531 05532 #if FF_USE_MKFS && !FF_FS_READONLY 05533 /*-----------------------------------------------------------------------*/ 05534 /* Create an FAT/exFAT volume */ 05535 /*-----------------------------------------------------------------------*/ 05536 05537 FRESULT f_mkfs ( 05538 const TCHAR* path, /* Logical drive number */ 05539 BYTE opt, /* Format option */ 05540 DWORD au, /* Size of allocation unit (cluster) [byte] */ 05541 void* work, /* Pointer to working buffer (null: use heap memory) */ 05542 UINT len /* Size of working buffer [byte] */ 05543 ) 05544 { 05545 const UINT n_fats = 1; /* Number of FATs for FAT/FAT32 volume (1 or 2) */ 05546 const UINT n_rootdir = 512; /* Number of root directory entries for FAT volume */ 05547 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */ 05548 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */ 05549 BYTE fmt, sys, *buf, *pte, pdrv, part; 05550 WORD ss; /* Sector size */ 05551 DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n; 05552 DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */ 05553 DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */ 05554 UINT i; 05555 int vol; 05556 DSTATUS stat; 05557 #if FF_USE_TRIM || FF_FS_EXFAT 05558 DWORD tbl[3]; 05559 #endif 05560 05561 05562 /* Check mounted drive and clear work area */ 05563 vol = get_ldnumber(&path); /* Get target logical drive */ 05564 if (vol < 0) return FR_INVALID_DRIVE; 05565 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the volume if mounted */ 05566 pdrv = LD2PD(vol); /* Physical drive */ 05567 part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */ 05568 05569 /* Check physical drive status */ 05570 stat = disk_initialize(pdrv); 05571 if (stat & STA_NOINIT) return FR_NOT_READY; 05572 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 05573 if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK || !sz_blk || sz_blk > 32768 || (sz_blk & (sz_blk - 1))) sz_blk = 1; /* Erase block to align data area */ 05574 #if FF_MAX_SS != FF_MIN_SS /* Get sector size of the medium if variable sector size cfg. */ 05575 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; 05576 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; 05577 #else 05578 ss = FF_MAX_SS; 05579 #endif 05580 if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */ 05581 au /= ss; /* Cluster size in unit of sector */ 05582 05583 /* Get working buffer */ 05584 #if FF_USE_LFN == 3 || FF_FS_HEAPBUF 05585 if (!work) { /* Use heap memory for working buffer */ 05586 for (szb_buf = MAX_MALLOC, buf = 0; szb_buf >= ss && !(buf = (BYTE *)ff_memalloc(szb_buf)); szb_buf /= 2) ; 05587 sz_buf = szb_buf / ss; /* Size of working buffer (sector) */ 05588 } else 05589 #endif 05590 { 05591 buf = (BYTE*)work; /* Working buffer */ 05592 sz_buf = len / ss; /* Size of working buffer (sector) */ 05593 szb_buf = sz_buf * ss; /* Size of working buffer (byte) */ 05594 } 05595 if (!buf || sz_buf == 0) return FR_NOT_ENOUGH_CORE; 05596 05597 /* Determine where the volume to be located (b_vol, sz_vol) */ 05598 if (FF_MULTI_PARTITION && part != 0) { 05599 /* Get partition information from partition table in the MBR */ 05600 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */ 05601 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */ 05602 pte = buf + (MBR_Table + (part - 1) * SZ_PTE); 05603 if (pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */ 05604 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */ 05605 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */ 05606 } else { 05607 /* Create a single-partition in this function */ 05608 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05609 b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */ 05610 if (sz_vol < b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); 05611 sz_vol -= b_vol; /* Volume size */ 05612 } 05613 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */ 05614 05615 /* Pre-determine the FAT type */ 05616 do { 05617 if (FF_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */ 05618 if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */ 05619 fmt = FS_EXFAT; break; 05620 } 05621 } 05622 if (au > 128) LEAVE_MKFS(FR_INVALID_PARAMETER); /* Too large au for FAT/FAT32 */ 05623 if (opt & FM_FAT32) { /* FAT32 possible? */ 05624 if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */ 05625 fmt = FS_FAT32; break; 05626 } 05627 } 05628 if (!(opt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */ 05629 fmt = FS_FAT16; 05630 } while (0); 05631 05632 #if FF_FS_EXFAT 05633 if (fmt == FS_EXFAT) { /* Create an exFAT volume */ 05634 DWORD szb_bit, szb_case, sum, nb, cl; 05635 WCHAR ch, si; 05636 UINT j, st; 05637 BYTE b; 05638 05639 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 05640 #if FF_USE_TRIM 05641 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area may be erased */ 05642 disk_ioctl(pdrv, CTRL_TRIM, tbl); 05643 #endif 05644 /* Determine FAT location, data location and number of clusters */ 05645 if (au == 0) { /* au auto-selection */ 05646 au = 8; 05647 if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */ 05648 if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */ 05649 } 05650 b_fat = b_vol + 32; /* FAT start at offset 32 */ 05651 sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */ 05652 b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */ 05653 if (b_data >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 05654 n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */ 05655 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */ 05656 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */ 05657 05658 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */ 05659 tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */ 05660 05661 /* Create a compressed up-case table */ 05662 sect = b_data + au * tbl[0]; /* Table start sector */ 05663 sum = 0; /* Table checksum to be stored in the 82 entry */ 05664 st = si = i = j = szb_case = 0; 05665 do { 05666 switch (st) { 05667 case 0: 05668 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */ 05669 if (ch != si) { 05670 si++; break; /* Store the up-case char if exist */ 05671 } 05672 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */ 05673 if (j >= 128) { 05674 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */ 05675 } 05676 st = 1; /* Do not compress short run */ 05677 /* go to next case */ 05678 case 1: 05679 ch = si++; /* Fill the short run */ 05680 if (--j == 0) st = 0; 05681 break; 05682 05683 default: 05684 ch = (WCHAR)j; si += j; /* Number of chars to skip */ 05685 st = 0; 05686 } 05687 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */ 05688 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum); 05689 i += 2; szb_case += 2; 05690 if (si == 0 || i == szb_buf) { /* Write buffered data when buffer full or end of process */ 05691 n = (i + ss - 1) / ss; 05692 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05693 sect += n; i = 0; 05694 } 05695 } while (si); 05696 tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */ 05697 tbl[2] = 1; /* Number of root dir clusters */ 05698 05699 /* Initialize the allocation bitmap */ 05700 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */ 05701 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */ 05702 do { 05703 mem_set(buf, 0, szb_buf); 05704 for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ; 05705 for (b = 1; nb != 0 && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ; 05706 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 05707 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05708 sect += n; nsect -= n; 05709 } while (nsect); 05710 05711 /* Initialize the FAT */ 05712 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */ 05713 j = nb = cl = 0; 05714 do { 05715 mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */ 05716 if (cl == 0) { /* Set entry 0 and 1 */ 05717 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++; 05718 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++; 05719 } 05720 do { /* Create chains of bitmap, up-case and root dir */ 05721 while (nb != 0 && i < szb_buf) { /* Create a chain */ 05722 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF); 05723 i += 4; cl++; nb--; 05724 } 05725 if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */ 05726 } while (nb != 0 && i < szb_buf); 05727 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 05728 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05729 sect += n; nsect -= n; 05730 } while (nsect); 05731 05732 /* Initialize the root directory */ 05733 mem_set(buf, 0, szb_buf); 05734 buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */ 05735 buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */ 05736 st_dword(buf + SZDIRE * 1 + 20, 2); 05737 st_dword(buf + SZDIRE * 1 + 24, szb_bit); 05738 buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */ 05739 st_dword(buf + SZDIRE * 2 + 4, sum); 05740 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); 05741 st_dword(buf + SZDIRE * 2 + 24, szb_case); 05742 sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */ 05743 do { /* Fill root directory sectors */ 05744 n = (nsect > sz_buf) ? sz_buf : nsect; 05745 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05746 mem_set(buf, 0, ss); 05747 sect += n; nsect -= n; 05748 } while (nsect); 05749 05750 /* Create two set of the exFAT VBR blocks */ 05751 sect = b_vol; 05752 for (n = 0; n < 2; n++) { 05753 /* Main record (+0) */ 05754 mem_set(buf, 0, ss); 05755 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */ 05756 st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */ 05757 st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */ 05758 st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */ 05759 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */ 05760 st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */ 05761 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */ 05762 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */ 05763 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */ 05764 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */ 05765 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */ 05766 for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */ 05767 buf[BPB_NumFATsEx] = 1; /* Number of FATs */ 05768 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */ 05769 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */ 05770 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */ 05771 for (i = sum = 0; i < ss; i++) { /* VBR checksum */ 05772 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum); 05773 } 05774 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05775 /* Extended bootstrap record (+1..+8) */ 05776 mem_set(buf, 0, ss); 05777 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */ 05778 for (j = 1; j < 9; j++) { 05779 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 05780 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05781 } 05782 /* OEM/Reserved record (+9..+10) */ 05783 mem_set(buf, 0, ss); 05784 for ( ; j < 11; j++) { 05785 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 05786 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05787 } 05788 /* Sum record (+11) */ 05789 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */ 05790 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05791 } 05792 05793 } else 05794 #endif /* FF_FS_EXFAT */ 05795 { /* Create an FAT/FAT32 volume */ 05796 do { 05797 pau = au; 05798 /* Pre-determine number of clusters and FAT sub-type */ 05799 if (fmt == FS_FAT32) { /* FAT32 volume */ 05800 if (pau == 0) { /* au auto-selection */ 05801 n = sz_vol / 0x20000; /* Volume size in unit of 128KS */ 05802 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */ 05803 } 05804 n_clst = sz_vol / pau; /* Number of clusters */ 05805 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */ 05806 sz_rsv = 32; /* Number of reserved sectors */ 05807 sz_dir = 0; /* No static directory */ 05808 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED); 05809 } else { /* FAT volume */ 05810 if (pau == 0) { /* au auto-selection */ 05811 n = sz_vol / 0x1000; /* Volume size in unit of 4KS */ 05812 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */ 05813 } 05814 n_clst = sz_vol / pau; 05815 if (n_clst > MAX_FAT12) { 05816 n = n_clst * 2 + 4; /* FAT size [byte] */ 05817 } else { 05818 fmt = FS_FAT12; 05819 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */ 05820 } 05821 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */ 05822 sz_rsv = 1; /* Number of reserved sectors */ 05823 sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */ 05824 } 05825 b_fat = b_vol + sz_rsv; /* FAT base */ 05826 b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */ 05827 05828 /* Align data base to erase block boundary (for flash memory media) */ 05829 n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */ 05830 if (fmt == FS_FAT32) { /* FAT32: Move FAT base */ 05831 sz_rsv += n; b_fat += n; 05832 } else { /* FAT: Expand FAT size */ 05833 sz_fat += n / n_fats; 05834 } 05835 05836 /* Determine number of clusters and final check of validity of the FAT sub-type */ 05837 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume */ 05838 n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau; 05839 if (fmt == FS_FAT32) { 05840 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */ 05841 if (au == 0 && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */ 05842 LEAVE_MKFS(FR_MKFS_ABORTED); 05843 } 05844 } 05845 if (fmt == FS_FAT16) { 05846 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */ 05847 if (au == 0 && (pau * 2) <= 64) { 05848 au = pau * 2; continue; /* Adjust cluster size and retry */ 05849 } 05850 if ((opt & FM_FAT32)) { 05851 fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */ 05852 } 05853 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 05854 LEAVE_MKFS(FR_MKFS_ABORTED); 05855 } 05856 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */ 05857 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 05858 LEAVE_MKFS(FR_MKFS_ABORTED); 05859 } 05860 } 05861 if (fmt == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */ 05862 05863 /* Ok, it is the valid cluster configuration */ 05864 break; 05865 } while (1); 05866 05867 #if FF_USE_TRIM 05868 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ 05869 disk_ioctl(pdrv, CTRL_TRIM, tbl); 05870 #endif 05871 /* Create FAT VBR */ 05872 mem_set(buf, 0, ss); 05873 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */ 05874 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */ 05875 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */ 05876 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */ 05877 buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */ 05878 st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */ 05879 if (sz_vol < 0x10000) { 05880 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */ 05881 } else { 05882 st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */ 05883 } 05884 buf[BPB_Media] = 0xF8; /* Media descriptor byte */ 05885 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */ 05886 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */ 05887 st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */ 05888 if (fmt == FS_FAT32) { 05889 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */ 05890 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */ 05891 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */ 05892 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */ 05893 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */ 05894 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */ 05895 buf[BS_BootSig32] = 0x29; /* Extended boot signature */ 05896 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 05897 } else { 05898 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */ 05899 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */ 05900 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */ 05901 buf[BS_BootSig] = 0x29; /* Extended boot signature */ 05902 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 05903 } 05904 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */ 05905 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */ 05906 05907 /* Create FSINFO record if needed */ 05908 if (fmt == FS_FAT32) { 05909 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */ 05910 mem_set(buf, 0, ss); 05911 st_dword(buf + FSI_LeadSig, 0x41615252); 05912 st_dword(buf + FSI_StrucSig, 0x61417272); 05913 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 05914 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 05915 st_word(buf + BS_55AA, 0xAA55); 05916 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */ 05917 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */ 05918 } 05919 05920 /* Initialize FAT area */ 05921 mem_set(buf, 0, (UINT)szb_buf); 05922 sect = b_fat; /* FAT start sector */ 05923 for (i = 0; i < n_fats; i++) { /* Initialize FATs each */ 05924 if (fmt == FS_FAT32) { 05925 st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */ 05926 st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */ 05927 st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */ 05928 } else { 05929 st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */ 05930 } 05931 nsect = sz_fat; /* Number of FAT sectors */ 05932 do { /* Fill FAT sectors */ 05933 n = (nsect > sz_buf) ? sz_buf : nsect; 05934 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05935 mem_set(buf, 0, ss); 05936 sect += n; nsect -= n; 05937 } while (nsect); 05938 } 05939 05940 /* Initialize root directory (fill with zero) */ 05941 nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */ 05942 do { 05943 n = (nsect > sz_buf) ? sz_buf : nsect; 05944 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05945 sect += n; nsect -= n; 05946 } while (nsect); 05947 } 05948 05949 /* Determine system ID in the partition table */ 05950 if (FF_FS_EXFAT && fmt == FS_EXFAT) { 05951 sys = 0x07; /* HPFS/NTFS/exFAT */ 05952 } else { 05953 if (fmt == FS_FAT32) { 05954 sys = 0x0C; /* FAT32X */ 05955 } else { 05956 if (sz_vol >= 0x10000) { 05957 sys = 0x06; /* FAT12/16 (large) */ 05958 } else { 05959 sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */ 05960 } 05961 } 05962 } 05963 05964 /* Update partition information */ 05965 if (FF_MULTI_PARTITION && part != 0) { /* Created in the existing partition */ 05966 /* Update system ID in the partition table */ 05967 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */ 05968 buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */ 05969 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */ 05970 } else { /* Created as a new single partition */ 05971 if (!(opt & FM_SFD)) { /* Create partition table if in FDISK format */ 05972 mem_set(buf, 0, ss); 05973 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */ 05974 pte = buf + MBR_Table; /* Create partition table for single partition in the drive */ 05975 pte[PTE_Boot] = 0; /* Boot indicator */ 05976 pte[PTE_StHead] = 1; /* Start head */ 05977 pte[PTE_StSec] = 1; /* Start sector */ 05978 pte[PTE_StCyl] = 0; /* Start cylinder */ 05979 pte[PTE_System] = sys; /* System type */ 05980 n = (b_vol + sz_vol) / (63 * 255); /* (End CHS may be invalid) */ 05981 pte[PTE_EdHead] = 254; /* End head */ 05982 pte[PTE_EdSec] = (BYTE)(((n >> 2) & 0xC0) | 63); /* End sector */ 05983 pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */ 05984 st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */ 05985 st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */ 05986 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the MBR */ 05987 } 05988 } 05989 05990 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05991 05992 LEAVE_MKFS(FR_OK); 05993 } 05994 05995 05996 05997 #if FF_MULTI_PARTITION 05998 /*-----------------------------------------------------------------------*/ 05999 /* Create Partition Table on the Physical Drive */ 06000 /*-----------------------------------------------------------------------*/ 06001 06002 FRESULT f_fdisk ( 06003 BYTE pdrv, /* Physical drive number */ 06004 const DWORD* szt, /* Pointer to the size table for each partitions */ 06005 void* work /* Pointer to the working buffer (null: use heap memory) */ 06006 ) 06007 { 06008 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 06009 BYTE s_hd, e_hd, *p, *buf; = (BYTE*)work; 06010 DSTATUS stat; 06011 DWORD sz_disk, sz_part, s_part; 06012 FRESULT res; 06013 06014 06015 stat = disk_initialize(pdrv); 06016 if (stat & STA_NOINIT) return FR_NOT_READY; 06017 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 06018 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 06019 06020 buf = (BYTE*)work; 06021 #if FF_USE_LFN == 3 06022 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */ 06023 #endif 06024 if (!buf) return FR_NOT_ENOUGH_CORE; 06025 06026 /* Determine the CHS without any consideration of the drive geometry */ 06027 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 06028 if (n == 256) n--; 06029 e_hd = n - 1; 06030 sz_cyl = 63 * n; 06031 tot_cyl = sz_disk / sz_cyl; 06032 06033 /* Create partition table */ 06034 mem_set(buf, 0, FF_MAX_SS); 06035 p = buf + MBR_Table; b_cyl = 0; 06036 for (i = 0; i < 4; i++, p += SZ_PTE) { 06037 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; /* Number of cylinders */ 06038 if (p_cyl == 0) continue; 06039 s_part = (DWORD)sz_cyl * b_cyl; 06040 sz_part = (DWORD)sz_cyl * p_cyl; 06041 if (i == 0) { /* Exclude first track of cylinder 0 */ 06042 s_hd = 1; 06043 s_part += 63; sz_part -= 63; 06044 } else { 06045 s_hd = 0; 06046 } 06047 e_cyl = b_cyl + p_cyl - 1; /* End cylinder */ 06048 if (e_cyl >= tot_cyl) LEAVE_MKFS(FR_INVALID_PARAMETER); 06049 06050 /* Set partition table */ 06051 p[1] = s_hd; /* Start head */ 06052 p[2] = (BYTE)(((b_cyl >> 2) & 0xC0) | 1); /* Start sector */ 06053 p[3] = (BYTE)b_cyl; /* Start cylinder */ 06054 p[4] = 0x07; /* System type (temporary setting) */ 06055 p[5] = e_hd; /* End head */ 06056 p[6] = (BYTE)(((e_cyl >> 2) & 0xC0) | 63); /* End sector */ 06057 p[7] = (BYTE)e_cyl; /* End cylinder */ 06058 st_dword(p + 8, s_part); /* Start sector in LBA */ 06059 st_dword(p + 12, sz_part); /* Number of sectors */ 06060 06061 /* Next partition */ 06062 b_cyl += p_cyl; 06063 } 06064 st_word(p, 0xAA55); /* MBR signature (always at offset 510) */ 06065 06066 /* Write it to the MBR */ 06067 res = (disk_write(pdrv, buf, 0, 1) == RES_OK && disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 06068 LEAVE_MKFS(res); 06069 } 06070 06071 #endif /* FF_MULTI_PARTITION */ 06072 #endif /* FF_USE_MKFS && !FF_FS_READONLY */ 06073 06074 06075 06076 06077 #if FF_USE_STRFUNC 06078 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3) 06079 #error Wrong FF_STRF_ENCODE setting 06080 #endif 06081 /*-----------------------------------------------------------------------*/ 06082 /* Get a String from the File */ 06083 /*-----------------------------------------------------------------------*/ 06084 06085 TCHAR* f_gets ( 06086 TCHAR* buff, /* Pointer to the string buffer to read */ 06087 int len, /* Size of string buffer (items) */ 06088 FIL* fp /* Pointer to the file object */ 06089 ) 06090 { 06091 int nc = 0; 06092 TCHAR *p = buff; 06093 BYTE s[2]; 06094 UINT rc; 06095 WCHAR wc; 06096 #if FF_USE_LFN && ((FF_LFN_UNICODE == 1 && FF_STRF_ENCODE == 3) || (FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3)) 06097 DWORD dc; 06098 #endif 06099 #if FF_USE_LFN && FF_LFN_UNICODE == 1 && FF_STRF_ENCODE == 3 06100 UINT ct; 06101 #endif 06102 06103 #if FF_USE_LFN && FF_LFN_UNICODE == 1 /* UTF-16 output */ 06104 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */ 06105 while (nc < len - 1) { 06106 f_read(fp, s, 1, &rc); 06107 if (rc != 1) break; 06108 wc = s[0]; 06109 if (dbc_1st((BYTE)wc)) { 06110 f_read(fp, s, 1, &rc); 06111 if (rc != 1 || !dbc_2nd(s[0])) continue; 06112 wc = wc << 8 | s[0]; 06113 } 06114 wc = ff_oem2uni(wc, CODEPAGE); 06115 if (wc == 0) continue; 06116 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */ 06117 while (nc < len - 1) { 06118 f_read(fp, s, 2, &rc); 06119 if (rc != 2) break; 06120 wc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06121 #elif FF_STRF_ENCODE == 3 /* Read a character in UTF-8 */ 06122 while (nc < len - 2) { 06123 f_read(fp, s, 1, &rc); 06124 if (rc != 1) break; 06125 dc = s[0]; 06126 if (dc >= 0x80) { 06127 ct = 0; 06128 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } 06129 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } 06130 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } 06131 if (ct == 0) continue; 06132 do { 06133 f_read(fp, s, 1, &rc); 06134 if (rc != 1 || (s[0] & 0xC0) != 0x80) break; 06135 dc = dc << 6 | (s[0] & 0x3F); 06136 } while (--ct); 06137 if (ct || dc < 0x80 || dc >= 0x110000) continue; 06138 } 06139 if (dc >= 0x10000) { 06140 wc = (WCHAR)(0xD800 | ((dc >> 10) - 0x40)); 06141 *p++ = wc; nc++; 06142 wc = (WCHAR)(0xDC00 | (dc & 0x3FF)); 06143 } else { 06144 wc = (WCHAR)dc; 06145 } 06146 #endif 06147 /* Output it in UTF-16 encoding */ 06148 if (FF_USE_STRFUNC == 2 && wc == '\r') continue; 06149 *p++ = wc; nc++; 06150 if (wc == '\n') break; 06151 } 06152 06153 #elif FF_USE_LFN && FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3 /* UTF-8 output */ 06154 while (nc < len - 4) { 06155 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */ 06156 f_read(fp, s, 1, &rc); 06157 if (rc != 1) break; 06158 wc = s[0]; 06159 if (dbc_1st((BYTE)wc)) { 06160 f_read(fp, s, 1, &rc); 06161 if (rc != 1 || !dbc_2nd(s[0])) continue; 06162 wc = wc << 8 | s[0]; 06163 } 06164 dc = ff_oem2uni(wc, CODEPAGE); 06165 if (dc == 0) continue; 06166 #else /* Read a character in UTF-16LE/BE */ 06167 f_read(fp, s, 2, &rc); 06168 if (rc != 2) break; 06169 dc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06170 if (IsSurrogate(dc)) { 06171 f_read(fp, s, 2, &rc); 06172 if (rc != 2) break; 06173 wc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06174 if (!IsSurrogateH(dc) || !IsSurrogateL(wc)) continue; 06175 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); 06176 } 06177 #endif 06178 /* Output it in UTF-8 encoding */ 06179 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; 06180 if (dc < 0x80) { /* 1-byte */ 06181 *p++ = (TCHAR)dc; 06182 nc++; 06183 if (dc == '\n') break; 06184 } else { 06185 if (dc < 0x800) { /* 2-byte */ 06186 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F)); 06187 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06188 nc += 2; 06189 } else { 06190 if (dc < 0x10000) { /* 3-byte */ 06191 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F)); 06192 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 06193 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06194 nc += 3; 06195 } else { /* 4-byte */ 06196 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07)); 06197 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F)); 06198 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 06199 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06200 nc += 4; 06201 } 06202 } 06203 } 06204 } 06205 06206 #else /* Byte-by-byte without any conversion (ANSI/OEM API or UTF-8 to UTF-8) */ 06207 while (nc < len - 1) { 06208 f_read(fp, s, 1, &rc); 06209 if (rc != 1) break; 06210 wc = s[0]; 06211 if (FF_USE_STRFUNC == 2 && wc == '\r') continue; 06212 *p++ = (TCHAR)wc; nc++; 06213 if (wc == '\n') break; 06214 } 06215 #endif 06216 06217 *p = 0; 06218 return nc ? buff : 0; /* When no data read (EOF or error), return with error. */ 06219 } 06220 06221 06222 06223 06224 #if !FF_FS_READONLY 06225 #include <stdarg.h> 06226 /*-----------------------------------------------------------------------*/ 06227 /* Put a Character to the File */ 06228 /*-----------------------------------------------------------------------*/ 06229 06230 typedef struct { /* Putchar output buffer and work area */ 06231 FIL *fp; /* Ptr to the writing file */ 06232 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */ 06233 #if FF_USE_LFN && FF_LFN_UNICODE == 1 06234 WCHAR hs; 06235 #elif FF_USE_LFN && FF_LFN_UNICODE == 2 06236 BYTE bs[4]; 06237 UINT wi, ct; 06238 #endif 06239 BYTE buf[64]; /* Write buffer */ 06240 } putbuff; 06241 06242 06243 static 06244 void putc_bfd ( /* Buffered write with code conversion */ 06245 putbuff* pb, 06246 TCHAR c 06247 ) 06248 { 06249 UINT n; 06250 int i, nc; 06251 #if FF_USE_LFN && (FF_LFN_UNICODE == 1 || (FF_LFN_UNICODE == 2 && (FF_STRF_ENCODE != 3))) 06252 WCHAR hs, wc; 06253 #endif 06254 #if FF_USE_LFN && FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3 06255 DWORD dc; 06256 TCHAR *tp; 06257 #endif 06258 06259 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */ 06260 putc_bfd(pb, '\r'); 06261 } 06262 06263 i = pb->idx; /* Write index of pb->buf[] */ 06264 if (i < 0) return; 06265 nc = pb->nchr; /* Write unit count */ 06266 06267 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 06268 #if FF_USE_LFN && FF_LFN_UNICODE == 1 /* UTF-16 input */ 06269 if (IsSurrogateH(c)) { 06270 pb->hs = c; return; 06271 } 06272 wc = c; hs = pb->hs; pb->hs = 0; 06273 if (hs != 0) { 06274 if (!IsSurrogateL(wc)) hs = 0; 06275 } else { 06276 if (IsSurrogateL(wc)) return; 06277 } 06278 #if FF_STRF_ENCODE == 3 /* Write it in UTF-8 */ 06279 if (hs != 0) { /* 4-byte */ 06280 nc += 4; 06281 hs = (hs & 0x3FF) + 0x40; 06282 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8); 06283 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F)); 06284 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F)); 06285 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 06286 } else { 06287 if (wc < 0x80) { /* 1-byte */ 06288 nc++; 06289 pb->buf[i++] = (BYTE)wc; 06290 } else { 06291 if (wc < 0x800) { /* 2-byte */ 06292 nc += 2; 06293 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6); 06294 } else { /* 3-byte */ 06295 nc += 3; 06296 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12); 06297 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F)); 06298 } 06299 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 06300 } 06301 } 06302 #endif 06303 #else /* UTF-8 input */ 06304 for (;;) { 06305 if (pb->ct == 0) { /* Out of multi-byte sequence? */ 06306 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */ 06307 if ((BYTE)c < 0x80) break; /* 1-byte? */ 06308 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte? */ 06309 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte? */ 06310 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte? */ 06311 return; 06312 } else { /* In the multi-byte sequence */ 06313 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */ 06314 pb->ct = 0; continue; 06315 } 06316 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */ 06317 if (--pb->ct == 0) break; /* End of sequence? */ 06318 return; 06319 } 06320 } 06321 #if FF_STRF_ENCODE == 3 /* Write it in UTF-8 */ 06322 pb->buf[i++] = pb->bs[0]; nc++; 06323 if (pb->bs[0] >= 0xC0) { 06324 pb->buf[i++] = pb->bs[1]; nc++; 06325 } 06326 if (pb->bs[0] >= 0xE0) { 06327 pb->buf[i++] = pb->bs[2]; nc++; 06328 } 06329 if (pb->bs[0] >= 0xF0) { 06330 pb->buf[i++] = pb->bs[3]; nc++; 06331 } 06332 #else /* Write it in UTF-16 or ANSI/OEM */ 06333 tp = (TCHAR*)pb->bs; 06334 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */ 06335 if (dc == 0xFFFFFFFF) return; 06336 wc = (WCHAR)dc; 06337 hs = (WCHAR)(dc >> 16); 06338 #endif 06339 #endif 06340 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 && FF_STRF_ENCODE != 3 06341 #if FF_STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 06342 if (hs != 0) { 06343 pb->buf[i++] = (BYTE)(hs >> 8); 06344 pb->buf[i++] = (BYTE)hs; 06345 nc++; 06346 } 06347 pb->buf[i++] = (BYTE)(wc >> 8); 06348 pb->buf[i++] = (BYTE)wc; 06349 nc++; 06350 #elif FF_STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 06351 if (hs != 0) { 06352 pb->buf[i++] = (BYTE)hs; 06353 pb->buf[i++] = (BYTE)(hs >> 8); 06354 nc++; 06355 } 06356 pb->buf[i++] = (BYTE)wc; 06357 pb->buf[i++] = (BYTE)(wc >> 8); 06358 nc++; 06359 #else /* Write a character in ANSI/OEM */ 06360 if (hs != 0) return; 06361 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */ 06362 if (wc == 0) return;; 06363 if (wc >= 0x100) { 06364 pb->buf[i++] = (BYTE)(wc >> 8); nc++; 06365 } 06366 pb->buf[i++] = (BYTE)wc; nc++; 06367 #endif 06368 #endif 06369 06370 #else /* ANSI/OEM input */ 06371 pb->buf[i++] = (BYTE)c; 06372 nc++; 06373 #endif 06374 06375 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */ 06376 f_write(pb->fp, pb->buf, (UINT)i, &n); 06377 i = (n == (UINT)i) ? 0 : -1; 06378 } 06379 pb->idx = i; 06380 pb->nchr = nc; 06381 } 06382 06383 06384 static 06385 int putc_flush ( /* Flush left characters in the buffer */ 06386 putbuff* pb 06387 ) 06388 { 06389 UINT nw; 06390 06391 if ( pb->idx >= 0 /* Flush buffered characters to the file */ 06392 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK 06393 && (UINT)pb->idx == nw) return pb->nchr; 06394 return EOF; 06395 } 06396 06397 06398 static 06399 void putc_init ( /* Initialize write buffer */ 06400 putbuff* pb, 06401 FIL* fp 06402 ) 06403 { 06404 mem_set(pb, 0, sizeof (putbuff)); 06405 pb->fp = fp; 06406 } 06407 06408 06409 06410 int f_putc ( 06411 TCHAR c, /* A character to be output */ 06412 FIL* fp /* Pointer to the file object */ 06413 ) 06414 { 06415 putbuff pb; 06416 06417 06418 putc_init(&pb, fp); 06419 putc_bfd(&pb, c); /* Put the character */ 06420 return putc_flush(&pb); 06421 } 06422 06423 06424 06425 06426 /*-----------------------------------------------------------------------*/ 06427 /* Put a String to the File */ 06428 /*-----------------------------------------------------------------------*/ 06429 06430 int f_puts ( 06431 const TCHAR* str, /* Pointer to the string to be output */ 06432 FIL* fp /* Pointer to the file object */ 06433 ) 06434 { 06435 putbuff pb; 06436 06437 06438 putc_init(&pb, fp); 06439 while (*str) putc_bfd(&pb, *str++); /* Put the string */ 06440 return putc_flush(&pb); 06441 } 06442 06443 06444 06445 06446 /*-----------------------------------------------------------------------*/ 06447 /* Put a Formatted String to the File */ 06448 /*-----------------------------------------------------------------------*/ 06449 06450 int f_printf ( 06451 FIL* fp, /* Pointer to the file object */ 06452 const TCHAR* fmt, /* Pointer to the format string */ 06453 ... /* Optional arguments... */ 06454 ) 06455 { 06456 va_list arp; 06457 putbuff pb; 06458 BYTE f, r; 06459 UINT i, j, w; 06460 DWORD v; 06461 TCHAR c, d, str[32], *p; 06462 06463 06464 putc_init(&pb, fp); 06465 06466 va_start(arp, fmt); 06467 06468 for (;;) { 06469 c = *fmt++; 06470 if (c == 0) break; /* End of string */ 06471 if (c != '%') { /* Non escape character */ 06472 putc_bfd(&pb, c); 06473 continue; 06474 } 06475 w = f = 0; 06476 c = *fmt++; 06477 if (c == '0') { /* Flag: '0' padding */ 06478 f = 1; c = *fmt++; 06479 } else { 06480 if (c == '-') { /* Flag: left justified */ 06481 f = 2; c = *fmt++; 06482 } 06483 } 06484 if (c == '*') { /* Minimum width by argument */ 06485 w = va_arg(arp, int); 06486 c = *fmt++; 06487 } else { 06488 while (IsDigit(c)) { /* Minimum width */ 06489 w = w * 10 + c - '0'; 06490 c = *fmt++; 06491 } 06492 } 06493 if (c == 'l' || c == 'L') { /* Type prefix: Size is long int */ 06494 f |= 4; c = *fmt++; 06495 } 06496 if (c == 0) break; 06497 d = c; 06498 if (IsLower(d)) d -= 0x20; 06499 switch (d) { /* Atgument type is... */ 06500 case 'S' : /* String */ 06501 p = va_arg(arp, TCHAR*); 06502 for (j = 0; p[j]; j++) ; 06503 if (!(f & 2)) { /* Right padded */ 06504 while (j++ < w) putc_bfd(&pb, ' ') ; 06505 } 06506 while (*p) putc_bfd(&pb, *p++) ; /* String body */ 06507 while (j++ < w) putc_bfd(&pb, ' ') ; /* Left padded */ 06508 continue; 06509 06510 case 'C' : /* Character */ 06511 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 06512 06513 case 'B' : /* Unsigned binary */ 06514 r = 2; break; 06515 06516 case 'O' : /* Unsigned octal */ 06517 r = 8; break; 06518 06519 case 'D' : /* Signed decimal */ 06520 case 'U' : /* Unsigned decimal */ 06521 r = 10; break; 06522 06523 case 'X' : /* Unsigned hexdecimal */ 06524 r = 16; break; 06525 06526 default: /* Unknown type (pass-through) */ 06527 putc_bfd(&pb, c); continue; 06528 } 06529 06530 /* Get an argument and put it in numeral */ 06531 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 06532 if (d == 'D' && (v & 0x80000000)) { 06533 v = 0 - v; 06534 f |= 8; 06535 } 06536 i = 0; 06537 do { 06538 d = (TCHAR)(v % r); v /= r; 06539 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 06540 str[i++] = d + '0'; 06541 } while (v && i < sizeof str / sizeof *str); 06542 if (f & 8) str[i++] = '-'; 06543 j = i; d = (f & 1) ? '0' : ' '; 06544 if (!(f & 2)) { 06545 while (j++ < w) putc_bfd(&pb, d); /* Right pad */ 06546 } 06547 do { 06548 putc_bfd(&pb, str[--i]); /* Number body */ 06549 } while (i); 06550 while (j++ < w) putc_bfd(&pb, d); /* Left pad */ 06551 } 06552 06553 va_end(arp); 06554 06555 return putc_flush(&pb); 06556 } 06557 06558 #endif /* !FF_FS_READONLY */ 06559 #endif /* FF_USE_STRFUNC */ 06560 06561 06562 06563 #if FF_CODE_PAGE == 0 06564 /*-----------------------------------------------------------------------*/ 06565 /* Set Active Codepage for the Path Name */ 06566 /*-----------------------------------------------------------------------*/ 06567 06568 FRESULT f_setcp ( 06569 WORD cp /* Value to be set as active code page */ 06570 ) 06571 { 06572 static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 0}; 06573 static const BYTE *const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, 0}; 06574 UINT i; 06575 06576 06577 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */ 06578 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */ 06579 06580 CodePage = cp; 06581 if (cp >= 900) { /* DBCS */ 06582 ExCvt = 0; 06583 DbcTbl = tables[i]; 06584 } else { /* SBCS */ 06585 ExCvt = tables[i]; 06586 DbcTbl = 0; 06587 } 06588 return FR_OK; 06589 } 06590 #endif /* FF_CODE_PAGE == 0 */ 06591
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