EL4121 Embedded System
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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 (dp->sect == 0 || ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) return FR_NO_FILE; /* Report EOT when offset has reached max value */ 01744 01745 if (ofs % SS(fs) == 0) { /* Sector changed? */ 01746 dp->sect++; /* Next sector */ 01747 01748 if (dp->clust == 0) { /* Static table */ 01749 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */ 01750 dp->sect = 0; return FR_NO_FILE; 01751 } 01752 } 01753 else { /* Dynamic table */ 01754 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */ 01755 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */ 01756 if (clst <= 1) return FR_INT_ERR; /* Internal error */ 01757 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01758 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */ 01759 #if !FF_FS_READONLY 01760 if (!stretch) { /* If no stretch, report EOT */ 01761 dp->sect = 0; return FR_NO_FILE; 01762 } 01763 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */ 01764 if (clst == 0) return FR_DENIED; /* No free cluster */ 01765 if (clst == 1) return FR_INT_ERR; /* Internal error */ 01766 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */ 01767 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */ 01768 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */ 01769 #else 01770 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */ 01771 dp->sect = 0; return FR_NO_FILE; /* Report EOT */ 01772 #endif 01773 } 01774 dp->clust = clst; /* Initialize data for new cluster */ 01775 dp->sect = clst2sect(fs, clst); 01776 } 01777 } 01778 } 01779 dp->dptr = ofs; /* Current entry */ 01780 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */ 01781 01782 return FR_OK; 01783 } 01784 01785 01786 01787 01788 #if !FF_FS_READONLY 01789 /*-----------------------------------------------------------------------*/ 01790 /* Directory handling - Reserve a block of directory entries */ 01791 /*-----------------------------------------------------------------------*/ 01792 01793 static 01794 FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */ 01795 FATFS_DIR* dp, /* Pointer to the directory object */ 01796 UINT nent /* Number of contiguous entries to allocate */ 01797 ) 01798 { 01799 FRESULT res; 01800 UINT n; 01801 FATFS *fs = dp->obj.fs; 01802 01803 01804 res = dir_sdi(dp, 0); 01805 if (res == FR_OK) { 01806 n = 0; 01807 do { 01808 res = move_window(fs, dp->sect); 01809 if (res != FR_OK) break; 01810 #if FF_FS_EXFAT 01811 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { 01812 #else 01813 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { 01814 #endif 01815 if (++n == nent) break; /* A block of contiguous free entries is found */ 01816 } else { 01817 n = 0; /* Not a blank entry. Restart to search */ 01818 } 01819 res = dir_next(dp, 1); 01820 } while (res == FR_OK); /* Next entry with table stretch enabled */ 01821 } 01822 01823 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */ 01824 return res; 01825 } 01826 01827 #endif /* !FF_FS_READONLY */ 01828 01829 01830 01831 01832 /*-----------------------------------------------------------------------*/ 01833 /* FAT: Directory handling - Load/Store start cluster number */ 01834 /*-----------------------------------------------------------------------*/ 01835 01836 static 01837 DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */ 01838 FATFS* fs, /* Pointer to the fs object */ 01839 const BYTE* dir /* Pointer to the key entry */ 01840 ) 01841 { 01842 DWORD cl; 01843 01844 cl = ld_word(dir + DIR_FstClusLO); 01845 if (fs->fs_type == FS_FAT32) { 01846 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16; 01847 } 01848 01849 return cl; 01850 } 01851 01852 01853 #if !FF_FS_READONLY 01854 static 01855 void st_clust ( 01856 FATFS* fs, /* Pointer to the fs object */ 01857 BYTE* dir, /* Pointer to the key entry */ 01858 DWORD cl /* Value to be set */ 01859 ) 01860 { 01861 st_word(dir + DIR_FstClusLO, (WORD)cl); 01862 if (fs->fs_type == FS_FAT32) { 01863 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16)); 01864 } 01865 } 01866 #endif 01867 01868 01869 01870 #if FF_USE_LFN 01871 /*--------------------------------------------------------*/ 01872 /* FAT-LFN: Compare a part of file name with an LFN entry */ 01873 /*--------------------------------------------------------*/ 01874 static 01875 int cmp_lfn ( /* 1:matched, 0:not matched */ 01876 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */ 01877 BYTE* dir /* Pointer to the directory entry containing the part of LFN */ 01878 ) 01879 { 01880 UINT i, s; 01881 WCHAR wc, uc; 01882 01883 01884 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */ 01885 01886 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */ 01887 01888 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01889 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 01890 if (wc != 0) { 01891 if (i >= FF_MAX_LFN || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */ 01892 return 0; /* Not matched */ 01893 } 01894 wc = uc; 01895 } else { 01896 if (uc != 0xFFFF) return 0; /* Check filler */ 01897 } 01898 } 01899 01900 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */ 01901 01902 return 1; /* The part of LFN matched */ 01903 } 01904 01905 01906 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 01907 /*-----------------------------------------------------*/ 01908 /* FAT-LFN: Pick a part of file name from an LFN entry */ 01909 /*-----------------------------------------------------*/ 01910 static 01911 int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */ 01912 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */ 01913 BYTE* dir /* Pointer to the LFN entry */ 01914 ) 01915 { 01916 UINT i, s; 01917 WCHAR wc, uc; 01918 01919 01920 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */ 01921 01922 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */ 01923 01924 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */ 01925 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */ 01926 if (wc != 0) { 01927 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */ 01928 lfnbuf[i++] = wc = uc; /* Store it */ 01929 } else { 01930 if (uc != 0xFFFF) return 0; /* Check filler */ 01931 } 01932 } 01933 01934 if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */ 01935 if (i >= FF_MAX_LFN) return 0; /* Buffer overflow? */ 01936 lfnbuf[i] = 0; 01937 } 01938 01939 return 1; /* The part of LFN is valid */ 01940 } 01941 #endif 01942 01943 01944 #if !FF_FS_READONLY 01945 /*-----------------------------------------*/ 01946 /* FAT-LFN: Create an entry of LFN entries */ 01947 /*-----------------------------------------*/ 01948 static 01949 void put_lfn ( 01950 const WCHAR* lfn, /* Pointer to the LFN */ 01951 BYTE* dir, /* Pointer to the LFN entry to be created */ 01952 BYTE ord, /* LFN order (1-20) */ 01953 BYTE sum /* Checksum of the corresponding SFN */ 01954 ) 01955 { 01956 UINT i, s; 01957 WCHAR wc; 01958 01959 01960 dir[LDIR_Chksum] = sum; /* Set checksum */ 01961 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */ 01962 dir[LDIR_Type] = 0; 01963 st_word(dir + LDIR_FstClusLO, 0); 01964 01965 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */ 01966 s = wc = 0; 01967 do { 01968 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */ 01969 st_word(dir + LfnOfs[s], wc); /* Put it */ 01970 if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */ 01971 } while (++s < 13); 01972 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */ 01973 dir[LDIR_Ord] = ord; /* Set the LFN order */ 01974 } 01975 01976 #endif /* !FF_FS_READONLY */ 01977 #endif /* FF_USE_LFN */ 01978 01979 01980 01981 #if FF_USE_LFN && !FF_FS_READONLY 01982 /*-----------------------------------------------------------------------*/ 01983 /* FAT-LFN: Create a Numbered SFN */ 01984 /*-----------------------------------------------------------------------*/ 01985 01986 static 01987 void gen_numname ( 01988 BYTE* dst, /* Pointer to the buffer to store numbered SFN */ 01989 const BYTE* src, /* Pointer to SFN */ 01990 const WCHAR* lfn, /* Pointer to LFN */ 01991 UINT seq /* Sequence number */ 01992 ) 01993 { 01994 BYTE ns[8], c; 01995 UINT i, j; 01996 WCHAR wc; 01997 DWORD sr; 01998 01999 02000 mem_cpy(dst, src, 11); 02001 02002 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */ 02003 sr = seq; 02004 while (*lfn) { /* Create a CRC */ 02005 wc = *lfn++; 02006 for (i = 0; i < 16; i++) { 02007 sr = (sr << 1) + (wc & 1); 02008 wc >>= 1; 02009 if (sr & 0x10000) sr ^= 0x11021; 02010 } 02011 } 02012 seq = (UINT)sr; 02013 } 02014 02015 /* itoa (hexdecimal) */ 02016 i = 7; 02017 do { 02018 c = (BYTE)((seq % 16) + '0'); 02019 if (c > '9') c += 7; 02020 ns[i--] = c; 02021 seq /= 16; 02022 } while (seq); 02023 ns[i] = '~'; 02024 02025 /* Append the number to the SFN body */ 02026 for (j = 0; j < i && dst[j] != ' '; j++) { 02027 if (dbc_1st(dst[j])) { 02028 if (j == i - 1) break; 02029 j++; 02030 } 02031 } 02032 do { 02033 dst[j++] = (i < 8) ? ns[i++] : ' '; 02034 } while (j < 8); 02035 } 02036 #endif /* FF_USE_LFN && !FF_FS_READONLY */ 02037 02038 02039 02040 #if FF_USE_LFN 02041 /*-----------------------------------------------------------------------*/ 02042 /* FAT-LFN: Calculate checksum of an SFN entry */ 02043 /*-----------------------------------------------------------------------*/ 02044 02045 static 02046 BYTE sum_sfn ( 02047 const BYTE* dir /* Pointer to the SFN entry */ 02048 ) 02049 { 02050 BYTE sum = 0; 02051 UINT n = 11; 02052 02053 do { 02054 sum = (sum >> 1) + (sum << 7) + *dir++; 02055 } while (--n); 02056 return sum; 02057 } 02058 02059 #endif /* FF_USE_LFN */ 02060 02061 02062 02063 #if FF_FS_EXFAT 02064 /*-----------------------------------------------------------------------*/ 02065 /* exFAT: Checksum */ 02066 /*-----------------------------------------------------------------------*/ 02067 02068 static 02069 WORD xdir_sum ( /* Get checksum of the directoly entry block */ 02070 const BYTE* dir /* Directory entry block to be calculated */ 02071 ) 02072 { 02073 UINT i, szblk; 02074 WORD sum; 02075 02076 02077 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; 02078 for (i = sum = 0; i < szblk; i++) { 02079 if (i == XDIR_SetSum) { /* Skip sum field */ 02080 i++; 02081 } else { 02082 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i]; 02083 } 02084 } 02085 return sum; 02086 } 02087 02088 02089 02090 static 02091 WORD xname_sum ( /* Get check sum (to be used as hash) of the name */ 02092 const WCHAR* name /* File name to be calculated */ 02093 ) 02094 { 02095 WCHAR chr; 02096 WORD sum = 0; 02097 02098 02099 while ((chr = *name++) != 0) { 02100 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be upper-case converted */ 02101 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF); 02102 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8); 02103 } 02104 return sum; 02105 } 02106 02107 02108 #if !FF_FS_READONLY && FF_USE_MKFS 02109 static 02110 DWORD xsum32 ( 02111 BYTE dat, /* Byte to be calculated */ 02112 DWORD sum /* Previous sum */ 02113 ) 02114 { 02115 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat; 02116 return sum; 02117 } 02118 #endif 02119 02120 02121 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 02122 /*------------------------------------------------------*/ 02123 /* exFAT: Get object information from a directory block */ 02124 /*------------------------------------------------------*/ 02125 02126 static 02127 void get_xfileinfo ( 02128 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */ 02129 FILINFO* fno /* Buffer to store the extracted file information */ 02130 ) 02131 { 02132 WCHAR wc, hs; 02133 UINT di, si, nc; 02134 02135 /* Get file name from the entry block */ 02136 si = SZDIRE * 2; /* 1st C1 entry */ 02137 nc = hs = di = 0; 02138 while (nc < dirb[XDIR_NumName]) { 02139 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */ 02140 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */ 02141 wc = ld_word(dirb + si); si += 2; nc++; /* Get a character */ 02142 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 02143 hs = wc; continue; /* Get low surrogate */ 02144 } 02145 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */ 02146 if (wc == 0) { di = 0; break; } /* Buffer overflow or wrong encoding? */ 02147 di += wc; 02148 hs = 0; 02149 } 02150 if (hs != 0) di = 0; /* Broken surrogate pair? */ 02151 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */ 02152 fno->fname[di] = 0; /* Terminate the name */ 02153 fno->altname[0] = 0; /* exFAT does not have SFN */ 02154 02155 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */ 02156 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */ 02157 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */ 02158 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */ 02159 } 02160 02161 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 02162 02163 02164 /*-----------------------------------*/ 02165 /* exFAT: Get a directry entry block */ 02166 /*-----------------------------------*/ 02167 02168 static 02169 FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */ 02170 FATFS_DIR* dp /* Reading direcotry object pointing top of the entry block to load */ 02171 ) 02172 { 02173 FRESULT res; 02174 UINT i, sz_ent; 02175 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */ 02176 02177 02178 /* Load 85 entry */ 02179 res = move_window(dp->obj.fs, dp->sect); 02180 if (res != FR_OK) return res; 02181 if (dp->dir[XDIR_Type] != 0x85) return FR_INT_ERR; /* Invalid order */ 02182 mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE); 02183 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE; 02184 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR; 02185 02186 /* Load C0 entry */ 02187 res = dir_next(dp, 0); 02188 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 02189 if (res != FR_OK) return res; 02190 res = move_window(dp->obj.fs, dp->sect); 02191 if (res != FR_OK) return res; 02192 if (dp->dir[XDIR_Type] != 0xC0) return FR_INT_ERR; /* Invalid order */ 02193 mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE); 02194 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR; 02195 02196 /* Load C1 entries */ 02197 i = 2 * SZDIRE; /* C1 offset to load */ 02198 do { 02199 res = dir_next(dp, 0); 02200 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */ 02201 if (res != FR_OK) return res; 02202 res = move_window(dp->obj.fs, dp->sect); 02203 if (res != FR_OK) return res; 02204 if (dp->dir[XDIR_Type] != 0xC1) return FR_INT_ERR; /* Invalid order */ 02205 if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE); 02206 } while ((i += SZDIRE) < sz_ent); 02207 02208 /* Sanity check (do it for only accessible object) */ 02209 if (i <= MAXDIRB(FF_MAX_LFN)) { 02210 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR; 02211 } 02212 return FR_OK; 02213 } 02214 02215 02216 /*------------------------------------------------------------------*/ 02217 /* exFAT: Initialize object allocation info with loaded entry block */ 02218 /*------------------------------------------------------------------*/ 02219 02220 static 02221 void init_alloc_info ( 02222 FATFS* fs, /* Filesystem object */ 02223 FFOBJID* obj /* Object allocation information to be initialized */ 02224 ) 02225 { 02226 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */ 02227 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */ 02228 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */ 02229 obj->n_frag = 0; /* No last fragment info */ 02230 } 02231 02232 02233 02234 #if !FF_FS_READONLY || FF_FS_RPATH != 0 02235 /*------------------------------------------------*/ 02236 /* exFAT: Load the object's directory entry block */ 02237 /*------------------------------------------------*/ 02238 static 02239 FRESULT load_obj_xdir ( 02240 FATFS_DIR* dp, /* Blank directory object to be used to access containing direcotry */ 02241 const FFOBJID* obj /* Object with its containing directory information */ 02242 ) 02243 { 02244 FRESULT res; 02245 02246 /* Open object containing directory */ 02247 dp->obj.fs = obj->fs; 02248 dp->obj.sclust = obj->c_scl; 02249 dp->obj.stat = (BYTE)obj->c_size; 02250 dp->obj.objsize = obj->c_size & 0xFFFFFF00; 02251 dp->obj.n_frag = 0; 02252 dp->blk_ofs = obj->c_ofs; 02253 02254 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */ 02255 if (res == FR_OK) { 02256 res = load_xdir(dp); /* Load the object's entry block */ 02257 } 02258 return res; 02259 } 02260 #endif 02261 02262 02263 #if !FF_FS_READONLY 02264 /*----------------------------------------*/ 02265 /* exFAT: Store the directory entry block */ 02266 /*----------------------------------------*/ 02267 static 02268 FRESULT store_xdir ( 02269 FATFS_DIR* dp /* Pointer to the direcotry object */ 02270 ) 02271 { 02272 FRESULT res; 02273 UINT nent; 02274 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */ 02275 02276 /* Create set sum */ 02277 st_word(dirb + XDIR_SetSum, xdir_sum(dirb)); 02278 nent = dirb[XDIR_NumSec] + 1; 02279 02280 /* Store the direcotry entry block to the directory */ 02281 res = dir_sdi(dp, dp->blk_ofs); 02282 while (res == FR_OK) { 02283 res = move_window(dp->obj.fs, dp->sect); 02284 if (res != FR_OK) break; 02285 mem_cpy(dp->dir, dirb, SZDIRE); 02286 dp->obj.fs->wflag = 1; 02287 if (--nent == 0) break; 02288 dirb += SZDIRE; 02289 res = dir_next(dp, 0); 02290 } 02291 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR; 02292 } 02293 02294 02295 02296 /*-------------------------------------------*/ 02297 /* exFAT: Create a new directory enrty block */ 02298 /*-------------------------------------------*/ 02299 02300 static 02301 void create_xdir ( 02302 BYTE* dirb, /* Pointer to the direcotry entry block buffer */ 02303 const WCHAR* lfn /* Pointer to the object name */ 02304 ) 02305 { 02306 UINT i; 02307 BYTE nc1, nlen; 02308 WCHAR wc; 02309 02310 02311 /* Create 85,C0 entry */ 02312 mem_set(dirb, 0, 2 * SZDIRE); 02313 dirb[0 * SZDIRE + XDIR_Type] = 0x85; /* 85 entry */ 02314 dirb[1 * SZDIRE + XDIR_Type] = 0xC0; /* C0 entry */ 02315 02316 /* Create C1 entries */ 02317 i = SZDIRE * 2; /* Top of C1 entries */ 02318 nlen = nc1 = 0; wc = 1; 02319 do { 02320 dirb[i++] = 0xC1; dirb[i++] = 0; /* Entry type C1 */ 02321 do { /* Fill name field */ 02322 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */ 02323 st_word(dirb + i, wc); /* Store it */ 02324 i += 2; 02325 } while (i % SZDIRE != 0); 02326 nc1++; 02327 } while (lfn[nlen]); /* Fill next entry if any char follows */ 02328 02329 dirb[XDIR_NumName] = nlen; /* Set name length */ 02330 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */ 02331 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */ 02332 } 02333 02334 #endif /* !FF_FS_READONLY */ 02335 #endif /* FF_FS_EXFAT */ 02336 02337 02338 02339 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT 02340 /*-----------------------------------------------------------------------*/ 02341 /* Read an object from the directory */ 02342 /*-----------------------------------------------------------------------*/ 02343 02344 #define dir_read_file(dp) dir_read(dp, 0) 02345 #define dir_read_label(dp) dir_read(dp, 1) 02346 02347 static 02348 FRESULT dir_read ( 02349 FATFS_DIR* dp, /* Pointer to the directory object */ 02350 int vol /* Filtered by 0:file/directory or 1:volume label */ 02351 ) 02352 { 02353 FRESULT res = FR_NO_FILE; 02354 FATFS *fs = dp->obj.fs; 02355 BYTE a, c; 02356 #if FF_USE_LFN 02357 BYTE ord = 0xFF, sum = 0xFF; 02358 #endif 02359 02360 while (dp->sect) { 02361 res = move_window(fs, dp->sect); 02362 if (res != FR_OK) break; 02363 c = dp->dir[DIR_Name]; /* Test for the entry type */ 02364 if (c == 0) { 02365 res = FR_NO_FILE; break; /* Reached to end of the directory */ 02366 } 02367 #if FF_FS_EXFAT 02368 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02369 if (FF_USE_LABEL && vol) { 02370 if (c == 0x83) break; /* Volume label entry? */ 02371 } else { 02372 if (c == 0x85) { /* Start of the file entry block? */ 02373 dp->blk_ofs = dp->dptr; /* Get location of the block */ 02374 res = load_xdir(dp); /* Load the entry block */ 02375 if (res == FR_OK) { 02376 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */ 02377 } 02378 break; 02379 } 02380 } 02381 } else 02382 #endif 02383 { /* On the FAT/FAT32 volume */ 02384 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */ 02385 #if FF_USE_LFN /* LFN configuration */ 02386 if (c == DDEM || c == '.' || (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */ 02387 ord = 0xFF; 02388 } else { 02389 if (a == AM_LFN) { /* An LFN entry is found */ 02390 if (c & LLEF) { /* Is it start of an LFN sequence? */ 02391 sum = dp->dir[LDIR_Chksum]; 02392 c &= (BYTE)~LLEF; ord = c; 02393 dp->blk_ofs = dp->dptr; 02394 } 02395 /* Check LFN validity and capture it */ 02396 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 02397 } else { /* An SFN entry is found */ 02398 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */ 02399 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */ 02400 } 02401 break; 02402 } 02403 } 02404 #else /* Non LFN configuration */ 02405 if (c != DDEM && c != '.' && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */ 02406 break; 02407 } 02408 #endif 02409 } 02410 res = dir_next(dp, 0); /* Next entry */ 02411 if (res != FR_OK) break; 02412 } 02413 02414 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */ 02415 return res; 02416 } 02417 02418 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */ 02419 02420 02421 02422 /*-----------------------------------------------------------------------*/ 02423 /* Directory handling - Find an object in the directory */ 02424 /*-----------------------------------------------------------------------*/ 02425 02426 static 02427 FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */ 02428 FATFS_DIR* dp /* Pointer to the directory object with the file name */ 02429 ) 02430 { 02431 FRESULT res; 02432 FATFS *fs = dp->obj.fs; 02433 BYTE c; 02434 #if FF_USE_LFN 02435 BYTE a, ord, sum; 02436 #endif 02437 02438 res = dir_sdi(dp, 0); /* Rewind directory object */ 02439 if (res != FR_OK) return res; 02440 #if FF_FS_EXFAT 02441 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02442 BYTE nc; 02443 UINT di, ni; 02444 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */ 02445 02446 while ((res = dir_read_file(dp)) == FR_OK) { /* Read an item */ 02447 #if FF_MAX_LFN < 255 02448 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */ 02449 #endif 02450 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */ 02451 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */ 02452 if ((di % SZDIRE) == 0) di += 2; 02453 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break; 02454 } 02455 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */ 02456 } 02457 return res; 02458 } 02459 #endif 02460 /* On the FAT/FAT32 volume */ 02461 #if FF_USE_LFN 02462 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02463 #endif 02464 do { 02465 res = move_window(fs, dp->sect); 02466 if (res != FR_OK) break; 02467 c = dp->dir[DIR_Name]; 02468 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */ 02469 #if FF_USE_LFN /* LFN configuration */ 02470 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK; 02471 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */ 02472 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02473 } else { 02474 if (a == AM_LFN) { /* An LFN entry is found */ 02475 if (!(dp->fn[NSFLAG] & NS_NOLFN)) { 02476 if (c & LLEF) { /* Is it start of LFN sequence? */ 02477 sum = dp->dir[LDIR_Chksum]; 02478 c &= (BYTE)~LLEF; ord = c; /* LFN start order */ 02479 dp->blk_ofs = dp->dptr; /* Start offset of LFN */ 02480 } 02481 /* Check validity of the LFN entry and compare it with given name */ 02482 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF; 02483 } 02484 } else { /* An SFN entry is found */ 02485 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */ 02486 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */ 02487 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */ 02488 } 02489 } 02490 #else /* Non LFN configuration */ 02491 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK; 02492 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */ 02493 #endif 02494 res = dir_next(dp, 0); /* Next entry */ 02495 } while (res == FR_OK); 02496 02497 return res; 02498 } 02499 02500 02501 02502 02503 #if !FF_FS_READONLY 02504 /*-----------------------------------------------------------------------*/ 02505 /* Register an object to the directory */ 02506 /*-----------------------------------------------------------------------*/ 02507 02508 static 02509 FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */ 02510 FATFS_DIR* dp /* Target directory with object name to be created */ 02511 ) 02512 { 02513 FRESULT res; 02514 FATFS *fs = dp->obj.fs; 02515 #if FF_USE_LFN /* LFN configuration */ 02516 UINT n, nlen, nent; 02517 BYTE sn[12], sum; 02518 02519 02520 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */ 02521 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */ 02522 02523 #if FF_FS_EXFAT 02524 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02525 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */ 02526 res = dir_alloc(dp, nent); /* Allocate entries */ 02527 if (res != FR_OK) return res; 02528 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */ 02529 02530 if (dp->obj.stat & 4) { /* Has the directory been stretched? */ 02531 dp->obj.stat &= ~4; 02532 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */ 02533 if (res != FR_OK) return res; 02534 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */ 02535 if (res != FR_OK) return res; 02536 if (dp->obj.sclust != 0) { /* Is it a sub directory? */ 02537 FATFS_DIR dj; 02538 02539 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */ 02540 if (res != FR_OK) return res; 02541 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */ 02542 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */ 02543 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize); 02544 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; 02545 res = store_xdir(&dj); /* Store the object status */ 02546 if (res != FR_OK) return res; 02547 } 02548 } 02549 02550 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */ 02551 return FR_OK; 02552 } 02553 #endif 02554 /* On the FAT/FAT32 volume */ 02555 mem_cpy(sn, dp->fn, 12); 02556 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */ 02557 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */ 02558 for (n = 1; n < 100; n++) { 02559 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */ 02560 res = dir_find(dp); /* Check if the name collides with existing SFN */ 02561 if (res != FR_OK) break; 02562 } 02563 if (n == 100) return FR_DENIED; /* Abort if too many collisions */ 02564 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */ 02565 dp->fn[NSFLAG] = sn[NSFLAG]; 02566 } 02567 02568 /* Create an SFN with/without LFNs. */ 02569 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */ 02570 res = dir_alloc(dp, nent); /* Allocate entries */ 02571 if (res == FR_OK && --nent) { /* Set LFN entry if needed */ 02572 res = dir_sdi(dp, dp->dptr - nent * SZDIRE); 02573 if (res == FR_OK) { 02574 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */ 02575 do { /* Store LFN entries in bottom first */ 02576 res = move_window(fs, dp->sect); 02577 if (res != FR_OK) break; 02578 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum); 02579 fs->wflag = 1; 02580 res = dir_next(dp, 0); /* Next entry */ 02581 } while (res == FR_OK && --nent); 02582 } 02583 } 02584 02585 #else /* Non LFN configuration */ 02586 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */ 02587 02588 #endif 02589 02590 /* Set SFN entry */ 02591 if (res == FR_OK) { 02592 res = move_window(fs, dp->sect); 02593 if (res == FR_OK) { 02594 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */ 02595 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */ 02596 #if FF_USE_LFN 02597 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */ 02598 #endif 02599 fs->wflag = 1; 02600 } 02601 } 02602 02603 return res; 02604 } 02605 02606 #endif /* !FF_FS_READONLY */ 02607 02608 02609 02610 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0 02611 /*-----------------------------------------------------------------------*/ 02612 /* Remove an object from the directory */ 02613 /*-----------------------------------------------------------------------*/ 02614 02615 static 02616 FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */ 02617 FATFS_DIR* dp /* Directory object pointing the entry to be removed */ 02618 ) 02619 { 02620 FRESULT res; 02621 FATFS *fs = dp->obj.fs; 02622 #if FF_USE_LFN /* LFN configuration */ 02623 DWORD last = dp->dptr; 02624 02625 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */ 02626 if (res == FR_OK) { 02627 do { 02628 res = move_window(fs, dp->sect); 02629 if (res != FR_OK) break; 02630 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02631 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */ 02632 } else { /* On the FAT/FAT32 volume */ 02633 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */ 02634 } 02635 fs->wflag = 1; 02636 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */ 02637 res = dir_next(dp, 0); /* Next entry */ 02638 } while (res == FR_OK); 02639 if (res == FR_NO_FILE) res = FR_INT_ERR; 02640 } 02641 #else /* Non LFN configuration */ 02642 02643 res = move_window(fs, dp->sect); 02644 if (res == FR_OK) { 02645 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/ 02646 fs->wflag = 1; 02647 } 02648 #endif 02649 02650 return res; 02651 } 02652 02653 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */ 02654 02655 02656 02657 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 02658 /*-----------------------------------------------------------------------*/ 02659 /* Get file information from directory entry */ 02660 /*-----------------------------------------------------------------------*/ 02661 02662 static 02663 void get_fileinfo ( 02664 FATFS_DIR* dp, /* Pointer to the directory object */ 02665 FILINFO* fno /* Pointer to the file information to be filled */ 02666 ) 02667 { 02668 UINT si, di; 02669 #if FF_USE_LFN 02670 WCHAR wc, hs; 02671 FATFS *fs = dp->obj.fs; 02672 #else 02673 TCHAR c; 02674 #endif 02675 02676 02677 fno->fname[0] = 0; /* Invaidate file info */ 02678 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */ 02679 02680 #if FF_USE_LFN /* LFN configuration */ 02681 #if FF_FS_EXFAT 02682 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 02683 get_xfileinfo(fs->dirbuf, fno); 02684 return; 02685 } else 02686 #endif 02687 { /* On the FAT/FAT32 volume */ 02688 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */ 02689 si = di = hs = 0; 02690 while (fs->lfnbuf[si] != 0) { 02691 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */ 02692 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */ 02693 hs = wc; continue; /* Get low surrogate */ 02694 } 02695 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */ 02696 if (wc == 0) { di = 0; break; } /* Invalid char or buffer overflow? */ 02697 di += wc; 02698 hs = 0; 02699 } 02700 if (hs != 0) di = 0; /* Broken surrogate pair? */ 02701 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */ 02702 } 02703 } 02704 02705 si = di = 0; 02706 while (si < 11) { /* Get SFN from SFN entry */ 02707 wc = dp->dir[si++]; /* Get a char */ 02708 if (wc == ' ') continue; /* Skip padding spaces */ 02709 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */ 02710 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */ 02711 #if FF_LFN_UNICODE >= 1 /* Unicode output */ 02712 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */ 02713 wc = wc << 8 | dp->dir[si++]; 02714 } 02715 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */ 02716 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */ 02717 wc = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in UTF-16 or UTF-8 */ 02718 if (wc == 0) { di = 0; break; } /* Buffer overflow? */ 02719 di += wc; 02720 #else /* ANSI/OEM output */ 02721 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */ 02722 #endif 02723 } 02724 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */ 02725 02726 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */ 02727 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */ 02728 fno->fname[di++] = '?'; 02729 } else { 02730 for (si = di = 0; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */ 02731 wc = (WCHAR)fno->altname[si]; 02732 if (IsUpper(wc) && (dp->dir[DIR_NTres] & ((si >= 9) ? NS_EXT : NS_BODY))) wc += 0x20; 02733 fno->fname[di] = (TCHAR)wc; 02734 } 02735 } 02736 fno->fname[di] = 0; /* Terminate the LFN */ 02737 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */ 02738 } 02739 02740 #else /* Non-LFN configuration */ 02741 si = di = 0; 02742 while (si < 11) { /* Copy name body and extension */ 02743 c = (TCHAR)dp->dir[si++]; 02744 if (c == ' ') continue; /* Skip padding spaces */ 02745 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */ 02746 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */ 02747 fno->fname[di++] = c; 02748 } 02749 fno->fname[di] = 0; 02750 #endif 02751 02752 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */ 02753 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */ 02754 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */ 02755 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */ 02756 } 02757 02758 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */ 02759 02760 02761 02762 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1 02763 /*-----------------------------------------------------------------------*/ 02764 /* Pattern matching */ 02765 /*-----------------------------------------------------------------------*/ 02766 02767 static 02768 DWORD get_achar ( /* Get a character and advances ptr */ 02769 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */ 02770 ) 02771 { 02772 DWORD chr; 02773 02774 02775 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */ 02776 chr = tchar2uni(ptr); 02777 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */ 02778 chr = ff_wtoupper(chr); 02779 02780 #else /* ANSI/OEM input */ 02781 chr = (BYTE)*(*ptr)++; /* Get a byte */ 02782 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */ 02783 #if FF_CODE_PAGE == 0 02784 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 02785 #elif FF_CODE_PAGE < 900 02786 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */ 02787 #endif 02788 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900 02789 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */ 02790 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0; 02791 } 02792 #endif 02793 02794 #endif 02795 return chr; 02796 } 02797 02798 02799 static 02800 int pattern_matching ( /* 0:not matched, 1:matched */ 02801 const TCHAR* pat, /* Matching pattern */ 02802 const TCHAR* nam, /* String to be tested */ 02803 int skip, /* Number of pre-skip chars (number of ?s) */ 02804 int inf /* Infinite search (* specified) */ 02805 ) 02806 { 02807 const TCHAR *pp, *np; 02808 DWORD pc, nc; 02809 int nm, nx; 02810 02811 02812 while (skip--) { /* Pre-skip name chars */ 02813 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */ 02814 } 02815 if (*pat == 0 && inf) return 1; /* (short circuit) */ 02816 02817 do { 02818 pp = pat; np = nam; /* Top of pattern and name to match */ 02819 for (;;) { 02820 if (*pp == '?' || *pp == '*') { /* Wildcard? */ 02821 nm = nx = 0; 02822 do { /* Analyze the wildcard block */ 02823 if (*pp++ == '?') nm++; else nx = 1; 02824 } while (*pp == '?' || *pp == '*'); 02825 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */ 02826 nc = *np; break; /* Branch mismatched */ 02827 } 02828 pc = get_achar(&pp); /* Get a pattern char */ 02829 nc = get_achar(&np); /* Get a name char */ 02830 if (pc != nc) break; /* Branch mismatched? */ 02831 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */ 02832 } 02833 get_achar(&nam); /* nam++ */ 02834 } while (inf && nc); /* Retry until end of name if infinite search is specified */ 02835 02836 return 0; 02837 } 02838 02839 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */ 02840 02841 02842 02843 /*-----------------------------------------------------------------------*/ 02844 /* Pick a top segment and create the object name in directory form */ 02845 /*-----------------------------------------------------------------------*/ 02846 02847 static 02848 FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */ 02849 FATFS_DIR* dp, /* Pointer to the directory object */ 02850 const TCHAR** path /* Pointer to pointer to the segment in the path string */ 02851 ) 02852 { 02853 #if FF_USE_LFN /* LFN configuration */ 02854 BYTE b, cf; 02855 WCHAR wc, *lfn; 02856 DWORD uc; 02857 UINT i, ni, si, di; 02858 const TCHAR *p; 02859 02860 02861 /* Create LFN into LFN working buffer */ 02862 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0; 02863 for (;;) { 02864 uc = tchar2uni(&p); /* Get a character */ 02865 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */ 02866 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */ 02867 wc = (WCHAR)uc; 02868 if (wc < ' ' || wc == '/' || wc == '\\') break; /* Break if end of the path or a separator is found */ 02869 if (wc < 0x80 && chk_chr("\"*:<>\?|\x7F", wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */ 02870 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */ 02871 lfn[di++] = wc; /* Store the Unicode character */ 02872 } 02873 while (*p == '/' || *p == '\\') p++; /* Skip duplicated separators if exist */ 02874 *path = p; /* Return pointer to the next segment */ 02875 cf = (wc < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 02876 02877 #if FF_FS_RPATH != 0 02878 if ((di == 1 && lfn[di - 1] == '.') || 02879 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */ 02880 lfn[di] = 0; 02881 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */ 02882 dp->fn[i] = (i < di) ? '.' : ' '; 02883 } 02884 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */ 02885 return FR_OK; 02886 } 02887 #endif 02888 while (di) { /* Snip off trailing spaces and dots if exist */ 02889 wc = lfn[di - 1]; 02890 if (wc != ' ' && wc != '.') break; 02891 di--; 02892 } 02893 lfn[di] = 0; /* LFN is created into the working buffer */ 02894 if (di == 0) return FR_INVALID_NAME; /* Reject null name */ 02895 02896 /* Create SFN in directory form */ 02897 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */ 02898 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */ 02899 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */ 02900 02901 mem_set(dp->fn, ' ', 11); 02902 i = b = 0; ni = 8; 02903 for (;;) { 02904 wc = lfn[si++]; /* Get an LFN character */ 02905 if (wc == 0) break; /* Break on end of the LFN */ 02906 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */ 02907 cf |= NS_LOSS | NS_LFN; 02908 continue; 02909 } 02910 02911 if (i >= ni || si == di) { /* End of field? */ 02912 if (ni == 11) { /* Name extension overflow? */ 02913 cf |= NS_LOSS | NS_LFN; 02914 break; 02915 } 02916 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */ 02917 if (si > di) break; /* No name extension? */ 02918 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */ 02919 continue; 02920 } 02921 02922 if (wc >= 0x80) { /* Is this a non-ASCII character? */ 02923 cf |= NS_LFN; /* LFN entry needs to be created */ 02924 #if FF_CODE_PAGE == 0 02925 if (ExCvt) { /* At SBCS */ 02926 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 02927 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 02928 } else { /* At DBCS */ 02929 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 02930 } 02931 #elif FF_CODE_PAGE < 900 /* SBCS cfg */ 02932 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */ 02933 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */ 02934 #else /* DBCS cfg */ 02935 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */ 02936 #endif 02937 } 02938 02939 if (wc >= 0x100) { /* Is this a DBC? */ 02940 if (i >= ni - 1) { /* Field overflow? */ 02941 cf |= NS_LOSS | NS_LFN; 02942 i = ni; continue; /* Next field */ 02943 } 02944 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */ 02945 } else { /* SBC */ 02946 if (wc == 0 || chk_chr("+,;=[]", wc)) { /* Replace illegal characters for SFN if needed */ 02947 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */ 02948 } else { 02949 if (IsUpper(wc)) { /* ASCII upper case? */ 02950 b |= 2; 02951 } 02952 if (IsLower(wc)) { /* ASCII lower case? */ 02953 b |= 1; wc -= 0x20; 02954 } 02955 } 02956 } 02957 dp->fn[i++] = (BYTE)wc; 02958 } 02959 02960 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 02961 02962 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */ 02963 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */ 02964 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */ 02965 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */ 02966 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */ 02967 } 02968 02969 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */ 02970 02971 return FR_OK; 02972 02973 02974 #else /* FF_USE_LFN : Non-LFN configuration */ 02975 BYTE c, d, *sfn; 02976 UINT ni, si, i; 02977 const char *p; 02978 02979 /* Create file name in directory form */ 02980 p = *path; sfn = dp->fn; 02981 mem_set(sfn, ' ', 11); 02982 si = i = 0; ni = 8; 02983 #if FF_FS_RPATH != 0 02984 if (p[si] == '.') { /* Is this a dot entry? */ 02985 for (;;) { 02986 c = (BYTE)p[si++]; 02987 if (c != '.' || si >= 3) break; 02988 sfn[i++] = c; 02989 } 02990 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME; 02991 *path = p + si; /* Return pointer to the next segment */ 02992 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */ 02993 return FR_OK; 02994 } 02995 #endif 02996 for (;;) { 02997 c = (BYTE)p[si++]; /* Get a byte */ 02998 if (c <= ' ') break; /* Break if end of the path name */ 02999 if (c == '/' || c == '\\') { /* Break if a separator is found */ 03000 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */ 03001 break; 03002 } 03003 if (c == '.' || i >= ni) { /* End of body or field overflow? */ 03004 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */ 03005 i = 8; ni = 11; /* Enter file extension field */ 03006 continue; 03007 } 03008 #if FF_CODE_PAGE == 0 03009 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */ 03010 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 03011 } 03012 #elif FF_CODE_PAGE < 900 03013 if (c >= 0x80) { /* Is SBC extended character? */ 03014 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */ 03015 } 03016 #endif 03017 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */ 03018 d = (BYTE)p[si++]; /* Get 2nd byte */ 03019 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */ 03020 sfn[i++] = c; 03021 sfn[i++] = d; 03022 } else { /* SBC */ 03023 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */ 03024 if (IsLower(c)) c -= 0x20; /* To upper */ 03025 sfn[i++] = c; 03026 } 03027 } 03028 *path = p + si; /* Return pointer to the next segment */ 03029 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */ 03030 03031 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */ 03032 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */ 03033 03034 return FR_OK; 03035 #endif /* FF_USE_LFN */ 03036 } 03037 03038 03039 03040 03041 /*-----------------------------------------------------------------------*/ 03042 /* Follow a file path */ 03043 /*-----------------------------------------------------------------------*/ 03044 03045 static 03046 FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */ 03047 FATFS_DIR* dp, /* Directory object to return last directory and found object */ 03048 const TCHAR* path /* Full-path string to find a file or directory */ 03049 ) 03050 { 03051 FRESULT res; 03052 BYTE ns; 03053 FATFS *fs = dp->obj.fs; 03054 03055 03056 #if FF_FS_RPATH != 0 03057 if (*path != '/' && *path != '\\') { /* Without heading separator */ 03058 dp->obj.sclust = fs->cdir; /* Start from current directory */ 03059 } else 03060 #endif 03061 { /* With heading separator */ 03062 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */ 03063 dp->obj.sclust = 0; /* Start from root directory */ 03064 } 03065 #if FF_FS_EXFAT 03066 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */ 03067 #if FF_FS_RPATH != 0 03068 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */ 03069 FATFS_DIR dj; 03070 03071 dp->obj.c_scl = fs->cdc_scl; 03072 dp->obj.c_size = fs->cdc_size; 03073 dp->obj.c_ofs = fs->cdc_ofs; 03074 res = load_obj_xdir(&dj, &dp->obj); 03075 if (res != FR_OK) return res; 03076 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize); 03077 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2; 03078 } 03079 #endif 03080 #endif 03081 03082 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */ 03083 dp->fn[NSFLAG] = NS_NONAME; 03084 res = dir_sdi(dp, 0); 03085 03086 } else { /* Follow path */ 03087 for (;;) { 03088 res = create_name(dp, &path); /* Get a segment name of the path */ 03089 if (res != FR_OK) break; 03090 res = dir_find(dp); /* Find an object with the segment name */ 03091 ns = dp->fn[NSFLAG]; 03092 if (res != FR_OK) { /* Failed to find the object */ 03093 if (res == FR_NO_FILE) { /* Object is not found */ 03094 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */ 03095 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */ 03096 dp->fn[NSFLAG] = NS_NONAME; 03097 res = FR_OK; 03098 } else { /* Could not find the object */ 03099 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */ 03100 } 03101 } 03102 break; 03103 } 03104 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */ 03105 /* Get into the sub-directory */ 03106 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */ 03107 res = FR_NO_PATH; break; 03108 } 03109 #if FF_FS_EXFAT 03110 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */ 03111 dp->obj.c_scl = dp->obj.sclust; 03112 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 03113 dp->obj.c_ofs = dp->blk_ofs; 03114 init_alloc_info(fs, &dp->obj); /* Open next directory */ 03115 } else 03116 #endif 03117 { 03118 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */ 03119 } 03120 } 03121 } 03122 03123 return res; 03124 } 03125 03126 03127 03128 03129 /*-----------------------------------------------------------------------*/ 03130 /* Get logical drive number from path name */ 03131 /*-----------------------------------------------------------------------*/ 03132 03133 static 03134 int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */ 03135 const TCHAR** path /* Pointer to pointer to the path name */ 03136 ) 03137 { 03138 const TCHAR *tp, *tt; 03139 UINT i; 03140 int vol = -1; 03141 #if FF_STR_VOLUME_ID /* Find string drive id */ 03142 static const char* const volid[] = {FF_VOLUME_STRS}; 03143 const char *sp; 03144 char c; 03145 TCHAR tc; 03146 #endif 03147 03148 03149 if (*path != 0) { /* If the pointer is not a null */ 03150 for (tt = *path; (UINT)*tt >= (FF_USE_LFN ? ' ' : '!') && *tt != ':'; tt++) ; /* Find a colon in the path */ 03151 if (*tt == ':') { /* If a colon is exist in the path name */ 03152 tp = *path; 03153 i = *tp++; 03154 if (IsDigit(i) && tp == tt) { /* Is there a numeric drive id + colon? */ 03155 if ((i -= '0') < FF_VOLUMES) { /* If drive id is found, get the value and strip it */ 03156 vol = (int)i; 03157 *path = ++tt; 03158 } 03159 } 03160 #if FF_STR_VOLUME_ID 03161 else { /* No numeric drive number, find string drive id */ 03162 i = 0; tt++; 03163 do { 03164 sp = volid[i]; tp = *path; 03165 do { /* Compare a string drive id with path name */ 03166 c = *sp++; tc = *tp++; 03167 if (IsLower(tc)) tc -= 0x20; 03168 } while (c && (TCHAR)c == tc); 03169 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */ 03170 if (i < FF_VOLUMES) { /* If a drive id is found, get the value and strip it */ 03171 vol = (int)i; 03172 *path = tt; 03173 } 03174 } 03175 #endif 03176 } else { /* No volume id and use default drive */ 03177 #if FF_FS_RPATH != 0 && FF_VOLUMES >= 2 03178 vol = CurrVol; /* Current drive */ 03179 #else 03180 vol = 0; /* Drive 0 */ 03181 #endif 03182 } 03183 } 03184 return vol; 03185 } 03186 03187 03188 03189 03190 /*-----------------------------------------------------------------------*/ 03191 /* Load a sector and check if it is an FAT VBR */ 03192 /*-----------------------------------------------------------------------*/ 03193 03194 static 03195 BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */ 03196 FATFS* fs, /* Filesystem object */ 03197 DWORD sect /* Sector# (lba) to load and check if it is an FAT-VBR or not */ 03198 ) 03199 { 03200 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */ 03201 if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */ 03202 03203 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always placed here even if the sector size is >512) */ 03204 03205 #if FF_FS_EXFAT 03206 if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */ 03207 #endif 03208 if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) { /* Valid JumpBoot code? */ 03209 if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */ 03210 if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */ 03211 } 03212 return 2; /* Valid BS but not FAT */ 03213 } 03214 03215 03216 03217 03218 /*-----------------------------------------------------------------------*/ 03219 /* Determine logical drive number and mount the volume if needed */ 03220 /*-----------------------------------------------------------------------*/ 03221 03222 static 03223 FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */ 03224 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */ 03225 FATFS** rfs, /* Pointer to pointer to the found filesystem object */ 03226 BYTE mode /* !=0: Check write protection for write access */ 03227 ) 03228 { 03229 BYTE fmt, *pt; 03230 int vol; 03231 DSTATUS stat; 03232 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4]; 03233 WORD nrsv; 03234 FATFS *fs; 03235 UINT i; 03236 03237 03238 /* Get logical drive number */ 03239 *rfs = 0; 03240 vol = get_ldnumber(path); 03241 if (vol < 0) return FR_INVALID_DRIVE; 03242 03243 /* Check if the filesystem object is valid or not */ 03244 fs = FatFs[vol]; /* Get pointer to the filesystem object */ 03245 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */ 03246 #if FF_FS_REENTRANT 03247 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */ 03248 #endif 03249 *rfs = fs; /* Return pointer to the filesystem object */ 03250 03251 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */ 03252 if (fs->fs_type != 0) { /* If the volume has been mounted */ 03253 stat = disk_status(fs->pdrv); 03254 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */ 03255 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */ 03256 return FR_WRITE_PROTECTED; 03257 } 03258 return FR_OK; /* The filesystem object is valid */ 03259 } 03260 } 03261 03262 /* The filesystem object is not valid. */ 03263 /* Following code attempts to mount the volume. (analyze BPB and initialize the filesystem object) */ 03264 03265 fs->fs_type = 0; /* Clear the filesystem object */ 03266 fs->pdrv = LD2PD(vol); /* Bind the logical drive and a physical drive */ 03267 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */ 03268 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */ 03269 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */ 03270 } 03271 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */ 03272 return FR_WRITE_PROTECTED; 03273 } 03274 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */ 03275 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR; 03276 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR; 03277 #endif 03278 03279 #if FF_FS_HEAPBUF 03280 if (!fs->win) { 03281 fs->win = (BYTE*)ff_memalloc(SS(fs)); /* Allocate buffer to back window if necessary */ 03282 if (!fs->win) 03283 return FR_NOT_ENOUGH_CORE; 03284 } 03285 #endif 03286 03287 /* Find an FAT partition on the drive. Supports only generic partitioning rules, FDISK and SFD. */ 03288 bsect = 0; 03289 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */ 03290 if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */ 03291 for (i = 0; i < 4; i++) { /* Get partition offset */ 03292 pt = fs->win + (MBR_Table + i * SZ_PTE); 03293 br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0; 03294 } 03295 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */ 03296 if (i != 0) i--; 03297 do { /* Find an FAT volume */ 03298 bsect = br[i]; 03299 fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */ 03300 } while (LD2PT(vol) == 0 && fmt >= 2 && ++i < 4); 03301 } 03302 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */ 03303 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */ 03304 03305 /* An FAT volume is found (bsect). Following code initializes the filesystem object */ 03306 03307 #if FF_FS_EXFAT 03308 if (fmt == 1) { 03309 QWORD maxlba; 03310 03311 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */ 03312 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM; 03313 03314 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */ 03315 03316 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */ 03317 return FR_NO_FILESYSTEM; 03318 } 03319 03320 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */ 03321 if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */ 03322 03323 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */ 03324 03325 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */ 03326 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */ 03327 03328 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */ 03329 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */ 03330 03331 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */ 03332 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */ 03333 fs->n_fatent = nclst + 2; 03334 03335 /* Boundaries and Limits */ 03336 fs->volbase = bsect; 03337 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx); 03338 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx); 03339 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */ 03340 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx); 03341 03342 /* Check if bitmap location is in assumption (at the first cluster) */ 03343 if (move_window(fs, clst2sect(fs, fs->dirbase)) != FR_OK) return FR_DISK_ERR; 03344 for (i = 0; i < SS(fs); i += SZDIRE) { 03345 if (fs->win[i] == 0x81 && ld_dword(fs->win + i + 20) == 2) break; /* 81 entry with cluster #2? */ 03346 } 03347 if (i == SS(fs)) return FR_NO_FILESYSTEM; 03348 #if !FF_FS_READONLY 03349 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 03350 #endif 03351 fmt = FS_EXFAT; /* FAT sub-type */ 03352 } else 03353 #endif /* FF_FS_EXFAT */ 03354 { 03355 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */ 03356 03357 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */ 03358 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32); 03359 fs->fsize = fasize; 03360 03361 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */ 03362 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */ 03363 fasize *= fs->n_fats; /* Number of sectors for FAT area */ 03364 03365 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */ 03366 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */ 03367 03368 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */ 03369 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */ 03370 03371 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */ 03372 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32); 03373 03374 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */ 03375 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */ 03376 03377 /* Determine the FAT sub type */ 03378 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + FATFS_DIR */ 03379 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 03380 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */ 03381 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */ 03382 fmt = 0; 03383 if (nclst <= MAX_FAT32) fmt = FS_FAT32; 03384 if (nclst <= MAX_FAT16) fmt = FS_FAT16; 03385 if (nclst <= MAX_FAT12) fmt = FS_FAT12; 03386 if (fmt == 0) return FR_NO_FILESYSTEM; 03387 03388 /* Boundaries and Limits */ 03389 fs->n_fatent = nclst + 2; /* Number of FAT entries */ 03390 fs->volbase = bsect; /* Volume start sector */ 03391 fs->fatbase = bsect + nrsv; /* FAT start sector */ 03392 fs->database = bsect + sysect; /* Data start sector */ 03393 if (fmt == FS_FAT32) { 03394 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */ 03395 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */ 03396 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */ 03397 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */ 03398 } else { 03399 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */ 03400 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */ 03401 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */ 03402 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1); 03403 } 03404 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */ 03405 03406 #if !FF_FS_READONLY 03407 /* Get FSInfo if available */ 03408 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */ 03409 fs->fsi_flag = 0x80; 03410 #if (FF_FS_NOFSINFO & 3) != 3 03411 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */ 03412 && ld_word(fs->win + BPB_FSInfo32) == 1 03413 && move_window(fs, bsect + 1) == FR_OK) 03414 { 03415 fs->fsi_flag = 0; 03416 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */ 03417 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252 03418 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272) 03419 { 03420 #if (FF_FS_NOFSINFO & 1) == 0 03421 fs->free_clst = ld_dword(fs->win + FSI_Free_Count); 03422 #endif 03423 #if (FF_FS_NOFSINFO & 2) == 0 03424 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free); 03425 #endif 03426 } 03427 } 03428 #endif /* (FF_FS_NOFSINFO & 3) != 3 */ 03429 #endif /* !FF_FS_READONLY */ 03430 } 03431 03432 fs->fs_type = fmt; /* FAT sub-type */ 03433 fs->id = ++Fsid; /* Volume mount ID */ 03434 #if FF_USE_LFN == 1 03435 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */ 03436 #if FF_FS_EXFAT 03437 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */ 03438 #endif 03439 #endif 03440 #if FF_FS_RPATH != 0 03441 fs->cdir = 0; /* Initialize current directory */ 03442 #endif 03443 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */ 03444 clear_lock(fs); 03445 #endif 03446 return FR_OK; 03447 } 03448 03449 03450 03451 03452 /*-----------------------------------------------------------------------*/ 03453 /* Check if the file/directory object is valid or not */ 03454 /*-----------------------------------------------------------------------*/ 03455 03456 static 03457 FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */ 03458 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/FATFS_DIR object, to check validity */ 03459 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */ 03460 ) 03461 { 03462 FRESULT res = FR_INVALID_OBJECT; 03463 03464 03465 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */ 03466 #if FF_FS_REENTRANT 03467 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */ 03468 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 03469 res = FR_OK; 03470 } else { 03471 unlock_fs(obj->fs, FR_OK); 03472 } 03473 } else { 03474 res = FR_TIMEOUT; 03475 } 03476 #else 03477 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */ 03478 res = FR_OK; 03479 } 03480 #endif 03481 } 03482 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */ 03483 return res; 03484 } 03485 03486 03487 03488 03489 /*--------------------------------------------------------------------------- 03490 03491 Public Functions (FatFs API) 03492 03493 ----------------------------------------------------------------------------*/ 03494 03495 03496 03497 /*-----------------------------------------------------------------------*/ 03498 /* Mount/Unmount a Logical Drive */ 03499 /*-----------------------------------------------------------------------*/ 03500 03501 FRESULT f_mount ( 03502 FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/ 03503 const TCHAR* path, /* Logical drive number to be mounted/unmounted */ 03504 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */ 03505 ) 03506 { 03507 FATFS *cfs; 03508 int vol; 03509 FRESULT res; 03510 const TCHAR *rp = path; 03511 03512 03513 /* Get logical drive number */ 03514 vol = get_ldnumber(&rp); 03515 if (vol < 0) return FR_INVALID_DRIVE; 03516 cfs = FatFs[vol]; /* Pointer to fs object */ 03517 03518 if (cfs) { 03519 #if FF_FS_LOCK != 0 03520 clear_lock(cfs); 03521 #endif 03522 #if FF_FS_REENTRANT /* Discard sync object of the current volume */ 03523 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR; 03524 #endif 03525 cfs->fs_type = 0; /* Clear old fs object */ 03526 #if FF_FS_HEAPBUF 03527 ff_memfree(cfs->win); /* Clean up window buffer */ 03528 #endif 03529 } 03530 03531 if (fs) { 03532 fs->fs_type = 0; /* Clear new fs object */ 03533 #if FF_FS_REENTRANT /* Create sync object for the new volume */ 03534 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR; 03535 #endif 03536 #if FF_FS_HEAPBUF 03537 fs->win = 0; /* NULL buffer to prevent use of uninitialized buffer */ 03538 #endif 03539 } 03540 FatFs[vol] = fs; /* Register new fs object */ 03541 03542 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */ 03543 03544 res = find_volume(&path, &fs, 0); /* Force mounted the volume */ 03545 LEAVE_FF(fs, res); 03546 } 03547 03548 03549 03550 03551 /*-----------------------------------------------------------------------*/ 03552 /* Open or Create a File */ 03553 /*-----------------------------------------------------------------------*/ 03554 03555 FRESULT f_open ( 03556 FIL* fp, /* Pointer to the blank file object */ 03557 const TCHAR* path, /* Pointer to the file name */ 03558 BYTE mode /* Access mode and file open mode flags */ 03559 ) 03560 { 03561 FRESULT res; 03562 FATFS_DIR dj; 03563 FATFS *fs; 03564 #if !FF_FS_READONLY 03565 DWORD dw, cl, bcs, clst, sc; 03566 FSIZE_t ofs; 03567 #endif 03568 DEF_NAMBUF 03569 03570 03571 if (!fp) return FR_INVALID_OBJECT; 03572 03573 /* Get logical drive */ 03574 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND; 03575 res = find_volume(&path, &fs, mode); 03576 if (res == FR_OK) { 03577 dj.obj.fs = fs; 03578 INIT_NAMBUF(fs); 03579 res = follow_path(&dj, path); /* Follow the file path */ 03580 #if !FF_FS_READONLY /* Read/Write configuration */ 03581 if (res == FR_OK) { 03582 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */ 03583 res = FR_INVALID_NAME; 03584 } 03585 #if FF_FS_LOCK != 0 03586 else { 03587 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */ 03588 } 03589 #endif 03590 } 03591 /* Create or Open a file */ 03592 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) { 03593 if (res != FR_OK) { /* No file, create new */ 03594 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */ 03595 #if FF_FS_LOCK != 0 03596 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES; 03597 #else 03598 res = dir_register(&dj); 03599 #endif 03600 } 03601 mode |= FA_CREATE_ALWAYS; /* File is created */ 03602 } 03603 else { /* Any object with the same name is already existing */ 03604 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_DIR) */ 03605 res = FR_DENIED; 03606 } else { 03607 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */ 03608 } 03609 } 03610 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */ 03611 #if FF_FS_EXFAT 03612 if (fs->fs_type == FS_EXFAT) { 03613 /* Get current allocation info */ 03614 fp->obj.fs = fs; 03615 init_alloc_info(fs, &fp->obj); 03616 /* Set directory entry block initial state */ 03617 mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */ 03618 mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */ 03619 fs->dirbuf[XDIR_Attr] = AM_ARC; 03620 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME()); 03621 fs->dirbuf[XDIR_GenFlags] = 1; 03622 res = store_xdir(&dj); 03623 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */ 03624 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 03625 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */ 03626 } 03627 } else 03628 #endif 03629 { 03630 /* Set directory entry initial state */ 03631 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */ 03632 st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */ 03633 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */ 03634 st_clust(fs, dj.dir, 0); /* Reset file allocation info */ 03635 st_dword(dj.dir + DIR_FileSize, 0); 03636 fs->wflag = 1; 03637 if (cl != 0) { /* Remove the cluster chain if exist */ 03638 dw = fs->winsect; 03639 res = remove_chain(&dj.obj, cl, 0); 03640 if (res == FR_OK) { 03641 res = move_window(fs, dw); 03642 fs->last_clst = cl - 1; /* Reuse the cluster hole */ 03643 } 03644 } 03645 } 03646 } 03647 } 03648 else { /* Open an existing file */ 03649 if (res == FR_OK) { /* Is the object exsiting? */ 03650 if (dj.obj.attr & AM_DIR) { /* File open against a directory */ 03651 res = FR_NO_FILE; 03652 } else { 03653 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */ 03654 res = FR_DENIED; 03655 } 03656 } 03657 } 03658 } 03659 if (res == FR_OK) { 03660 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */ 03661 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */ 03662 fp->dir_ptr = dj.dir; 03663 #if FF_FS_LOCK != 0 03664 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */ 03665 if (fp->obj.lockid == 0) res = FR_INT_ERR; 03666 #endif 03667 } 03668 #else /* R/O configuration */ 03669 if (res == FR_OK) { 03670 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */ 03671 res = FR_INVALID_NAME; 03672 } else { 03673 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */ 03674 res = FR_NO_FILE; 03675 } 03676 } 03677 } 03678 #endif 03679 03680 if (res == FR_OK) { 03681 #if FF_FS_EXFAT 03682 if (fs->fs_type == FS_EXFAT) { 03683 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */ 03684 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 03685 fp->obj.c_ofs = dj.blk_ofs; 03686 init_alloc_info(fs, &fp->obj); 03687 } else 03688 #endif 03689 { 03690 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */ 03691 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize); 03692 } 03693 #if FF_USE_FASTSEEK 03694 fp->cltbl = 0; /* Disable fast seek mode */ 03695 #endif 03696 fp->obj.fs = fs; /* Validate the file object */ 03697 fp->obj.id = fs->id; 03698 fp->flag = mode; /* Set file access mode */ 03699 fp->err = 0; /* Clear error flag */ 03700 fp->sect = 0; /* Invalidate current data sector */ 03701 fp->fptr = 0; /* Set file pointer top of the file */ 03702 #if !FF_FS_READONLY 03703 #if !FF_FS_TINY 03704 #if FF_FS_HEAPBUF 03705 fp->buf = (BYTE*)ff_memalloc(SS(dj.obj.fs)); /* Allocate buffer if necessary */ 03706 if (!fp->buf) 03707 return FR_NOT_ENOUGH_CORE; 03708 #endif 03709 mem_set(fp->buf, 0, FF_MAX_SS); /* Clear sector buffer */ 03710 #endif 03711 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */ 03712 fp->fptr = fp->obj.objsize; /* Offset to seek */ 03713 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */ 03714 clst = fp->obj.sclust; /* Follow the cluster chain */ 03715 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) { 03716 clst = get_fat(&fp->obj, clst); 03717 if (clst <= 1) res = FR_INT_ERR; 03718 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR; 03719 } 03720 fp->clust = clst; 03721 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */ 03722 if ((sc = clst2sect(fs, clst)) == 0) { 03723 res = FR_INT_ERR; 03724 } else { 03725 fp->sect = sc + (DWORD)(ofs / SS(fs)); 03726 #if !FF_FS_TINY 03727 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR; 03728 #endif 03729 } 03730 } 03731 } 03732 #endif 03733 } 03734 03735 FREE_NAMBUF(); 03736 } 03737 03738 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */ 03739 03740 LEAVE_FF(fs, res); 03741 } 03742 03743 03744 03745 03746 /*-----------------------------------------------------------------------*/ 03747 /* Read File */ 03748 /*-----------------------------------------------------------------------*/ 03749 03750 FRESULT f_read ( 03751 FIL* fp, /* Pointer to the file object */ 03752 void* buff, /* Pointer to data buffer */ 03753 UINT btr, /* Number of bytes to read */ 03754 UINT* br /* Pointer to number of bytes read */ 03755 ) 03756 { 03757 FRESULT res; 03758 FATFS *fs; 03759 DWORD clst, sect; 03760 FSIZE_t remain; 03761 UINT rcnt, cc, csect; 03762 BYTE *rbuff = (BYTE*)buff; 03763 03764 03765 *br = 0; /* Clear read byte counter */ 03766 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03767 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 03768 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 03769 remain = fp->obj.objsize - fp->fptr; 03770 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */ 03771 03772 for ( ; btr; /* Repeat until all data read */ 03773 btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) { 03774 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 03775 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 03776 if (csect == 0) { /* On the cluster boundary? */ 03777 if (fp->fptr == 0) { /* On the top of the file? */ 03778 clst = fp->obj.sclust; /* Follow cluster chain from the origin */ 03779 } else { /* Middle or end of the file */ 03780 #if FF_USE_FASTSEEK 03781 if (fp->cltbl) { 03782 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 03783 } else 03784 #endif 03785 { 03786 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */ 03787 } 03788 } 03789 if (clst < 2) ABORT(fs, FR_INT_ERR); 03790 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 03791 fp->clust = clst; /* Update current cluster */ 03792 } 03793 sect = clst2sect(fs, fp->clust); /* Get current sector */ 03794 if (sect == 0) ABORT(fs, FR_INT_ERR); 03795 sect += csect; 03796 cc = btr / SS(fs); /* When remaining bytes >= sector size, */ 03797 if (cc > 0) { /* Read maximum contiguous sectors directly */ 03798 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 03799 cc = fs->csize - csect; 03800 } 03801 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 03802 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */ 03803 #if FF_FS_TINY 03804 if (fs->wflag && fs->winsect - sect < cc) { 03805 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs)); 03806 } 03807 #else 03808 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) { 03809 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs)); 03810 } 03811 #endif 03812 #endif 03813 rcnt = SS(fs) * cc; /* Number of bytes transferred */ 03814 continue; 03815 } 03816 #if !FF_FS_TINY 03817 if (fp->sect != sect) { /* Load data sector if not in cache */ 03818 #if !FF_FS_READONLY 03819 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 03820 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 03821 fp->flag &= (BYTE)~FA_DIRTY; 03822 } 03823 #endif 03824 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 03825 } 03826 #endif 03827 fp->sect = sect; 03828 } 03829 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 03830 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */ 03831 #if FF_FS_TINY 03832 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 03833 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 03834 #else 03835 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */ 03836 #endif 03837 } 03838 03839 LEAVE_FF(fs, FR_OK); 03840 } 03841 03842 03843 03844 03845 #if !FF_FS_READONLY 03846 /*-----------------------------------------------------------------------*/ 03847 /* Write File */ 03848 /*-----------------------------------------------------------------------*/ 03849 03850 FRESULT f_write ( 03851 FIL* fp, /* Pointer to the file object */ 03852 const void* buff, /* Pointer to the data to be written */ 03853 UINT btw, /* Number of bytes to write */ 03854 UINT* bw /* Pointer to number of bytes written */ 03855 ) 03856 { 03857 FRESULT res; 03858 FATFS *fs; 03859 DWORD clst, sect; 03860 UINT wcnt, cc, csect; 03861 const BYTE *wbuff = (const BYTE*)buff; 03862 bool need_sync = false; 03863 03864 *bw = 0; /* Clear write byte counter */ 03865 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03866 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */ 03867 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 03868 03869 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */ 03870 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) { 03871 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr); 03872 } 03873 03874 for ( ; btw; /* Repeat until all data written */ 03875 btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) { 03876 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 03877 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */ 03878 if (csect == 0) { /* On the cluster boundary? */ 03879 if (fp->fptr == 0) { /* On the top of the file? */ 03880 clst = fp->obj.sclust; /* Follow from the origin */ 03881 if (clst == 0) { /* If no cluster is allocated, */ 03882 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */ 03883 } 03884 } else { /* On the middle or end of the file */ 03885 #if FF_USE_FASTSEEK 03886 if (fp->cltbl) { 03887 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */ 03888 } else 03889 #endif 03890 { 03891 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */ 03892 } 03893 } 03894 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */ 03895 if (clst == 1) ABORT(fs, FR_INT_ERR); 03896 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 03897 fp->clust = clst; /* Update current cluster */ 03898 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */ 03899 #if FLUSH_ON_NEW_CLUSTER 03900 // We do not need to flush for the first cluster 03901 if (fp->fptr != 0) { 03902 need_sync = true; 03903 } 03904 #endif 03905 } 03906 #if FF_FS_TINY 03907 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */ 03908 #else 03909 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */ 03910 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 03911 fp->flag &= (BYTE)~FA_DIRTY; 03912 } 03913 #endif 03914 sect = clst2sect(fs, fp->clust); /* Get current sector */ 03915 if (sect == 0) ABORT(fs, FR_INT_ERR); 03916 sect += csect; 03917 cc = btw / SS(fs); /* When remaining bytes >= sector size, */ 03918 if (cc > 0) { /* Write maximum contiguous sectors directly */ 03919 if (csect + cc > fs->csize) { /* Clip at cluster boundary */ 03920 cc = fs->csize - csect; 03921 } 03922 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR); 03923 #if FF_FS_MINIMIZE <= 2 03924 #if FF_FS_TINY 03925 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 03926 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs)); 03927 fs->wflag = 0; 03928 } 03929 #else 03930 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */ 03931 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs)); 03932 fp->flag &= (BYTE)~FA_DIRTY; 03933 } 03934 #endif 03935 #endif 03936 wcnt = SS(fs) * cc; /* Number of bytes transferred */ 03937 #if FLUSH_ON_NEW_SECTOR 03938 need_sync = true; 03939 #endif 03940 continue; 03941 } 03942 #if FF_FS_TINY 03943 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */ 03944 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); 03945 fs->winsect = sect; 03946 } 03947 #else 03948 if (fp->sect != sect && /* Fill sector cache with file data */ 03949 fp->fptr < fp->obj.objsize && 03950 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) { 03951 ABORT(fs, FR_DISK_ERR); 03952 } 03953 #endif 03954 fp->sect = sect; 03955 } 03956 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 03957 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */ 03958 #if FF_FS_TINY 03959 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */ 03960 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 03961 fs->wflag = 1; 03962 #else 03963 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */ 03964 fp->flag |= FA_DIRTY; 03965 #endif 03966 } 03967 03968 fp->flag |= FA_MODIFIED; /* Set file change flag */ 03969 03970 if (need_sync) { 03971 f_sync (fp); 03972 } 03973 03974 LEAVE_FF(fs, FR_OK); 03975 } 03976 03977 03978 03979 03980 /*-----------------------------------------------------------------------*/ 03981 /* Synchronize the File */ 03982 /*-----------------------------------------------------------------------*/ 03983 03984 FRESULT f_sync ( 03985 FIL* fp /* Pointer to the file object */ 03986 ) 03987 { 03988 FRESULT res; 03989 FATFS *fs; 03990 DWORD tm; 03991 BYTE *dir; 03992 03993 03994 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 03995 if (res == FR_OK) { 03996 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */ 03997 #if !FF_FS_TINY 03998 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */ 03999 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR); 04000 fp->flag &= (BYTE)~FA_DIRTY; 04001 } 04002 #endif 04003 /* Update the directory entry */ 04004 tm = GET_FATTIME(); /* Modified time */ 04005 #if FF_FS_EXFAT 04006 if (fs->fs_type == FS_EXFAT) { 04007 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */ 04008 if (res == FR_OK) { 04009 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 04010 } 04011 if (res == FR_OK) { 04012 FATFS_DIR dj; 04013 DEF_NAMBUF 04014 04015 INIT_NAMBUF(fs); 04016 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */ 04017 if (res == FR_OK) { 04018 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 04019 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */ 04020 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); 04021 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); 04022 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); 04023 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */ 04024 fs->dirbuf[XDIR_ModTime10] = 0; 04025 st_dword(fs->dirbuf + XDIR_AccTime, 0); 04026 res = store_xdir(&dj); /* Restore it to the directory */ 04027 if (res == FR_OK) { 04028 res = sync_fs(fs); 04029 fp->flag &= (BYTE)~FA_MODIFIED; 04030 } 04031 } 04032 FREE_NAMBUF(); 04033 } 04034 } else 04035 #endif 04036 { 04037 res = move_window(fs, fp->dir_sect); 04038 if (res == FR_OK) { 04039 dir = fp->dir_ptr; 04040 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */ 04041 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */ 04042 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */ 04043 st_dword(dir + DIR_ModTime, tm); /* Update modified time */ 04044 st_word(dir + DIR_LstAccDate, 0); 04045 fs->wflag = 1; 04046 res = sync_fs(fs); /* Restore it to the directory */ 04047 fp->flag &= (BYTE)~FA_MODIFIED; 04048 } 04049 } 04050 } 04051 } 04052 04053 LEAVE_FF(fs, res); 04054 } 04055 04056 #endif /* !FF_FS_READONLY */ 04057 04058 04059 04060 04061 /*-----------------------------------------------------------------------*/ 04062 /* Close File */ 04063 /*-----------------------------------------------------------------------*/ 04064 04065 FRESULT f_close ( 04066 FIL* fp /* Pointer to the file object to be closed */ 04067 ) 04068 { 04069 FRESULT res; 04070 FATFS *fs; 04071 04072 #if !FF_FS_READONLY 04073 res = f_sync(fp); /* Flush cached data */ 04074 if (res == FR_OK) 04075 #endif 04076 { 04077 res = validate(&fp->obj, &fs); /* Lock volume */ 04078 if (res == FR_OK) { 04079 #if FF_FS_LOCK != 0 04080 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */ 04081 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */ 04082 #else 04083 fp->obj.fs = 0; /* Invalidate file object */ 04084 #endif 04085 #if FF_FS_REENTRANT 04086 unlock_fs(fs, FR_OK); /* Unlock volume */ 04087 #endif 04088 #if !FF_FS_TINY && FF_FS_HEAPBUF 04089 ff_memfree(fp->buf); /* Deallocate buffer */ 04090 #endif 04091 } 04092 } 04093 return res; 04094 } 04095 04096 04097 04098 04099 #if FF_FS_RPATH >= 1 04100 /*-----------------------------------------------------------------------*/ 04101 /* Change Current Directory or Current Drive, Get Current Directory */ 04102 /*-----------------------------------------------------------------------*/ 04103 04104 #if FF_VOLUMES >= 2 04105 FRESULT f_chdrive ( 04106 const TCHAR* path /* Drive number */ 04107 ) 04108 { 04109 int vol; 04110 04111 04112 /* Get logical drive number */ 04113 vol = get_ldnumber(&path); 04114 if (vol < 0) return FR_INVALID_DRIVE; 04115 04116 CurrVol = (BYTE)vol; /* Set it as current volume */ 04117 04118 return FR_OK; 04119 } 04120 #endif 04121 04122 04123 FRESULT f_chdir ( 04124 const TCHAR* path /* Pointer to the directory path */ 04125 ) 04126 { 04127 FRESULT res; 04128 FATFS_DIR dj; 04129 FATFS *fs; 04130 DEF_NAMBUF 04131 04132 /* Get logical drive */ 04133 res = find_volume(&path, &fs, 0); 04134 if (res == FR_OK) { 04135 dj.obj.fs = fs; 04136 INIT_NAMBUF(fs); 04137 res = follow_path(&dj, path); /* Follow the path */ 04138 if (res == FR_OK) { /* Follow completed */ 04139 if (dj.fn[NSFLAG] & NS_NONAME) { 04140 fs->cdir = dj.obj.sclust; /* It is the start directory itself */ 04141 #if FF_FS_EXFAT 04142 if (fs->fs_type == FS_EXFAT) { 04143 fs->cdc_scl = dj.obj.c_scl; 04144 fs->cdc_size = dj.obj.c_size; 04145 fs->cdc_ofs = dj.obj.c_ofs; 04146 } 04147 #endif 04148 } else { 04149 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */ 04150 #if FF_FS_EXFAT 04151 if (fs->fs_type == FS_EXFAT) { 04152 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */ 04153 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */ 04154 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat; 04155 fs->cdc_ofs = dj.blk_ofs; 04156 } else 04157 #endif 04158 { 04159 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */ 04160 } 04161 } else { 04162 res = FR_NO_PATH; /* Reached but a file */ 04163 } 04164 } 04165 } 04166 FREE_NAMBUF(); 04167 if (res == FR_NO_FILE) res = FR_NO_PATH; 04168 } 04169 04170 LEAVE_FF(fs, res); 04171 } 04172 04173 04174 #if FF_FS_RPATH >= 2 04175 FRESULT f_getcwd ( 04176 TCHAR* buff, /* Pointer to the directory path */ 04177 UINT len /* Size of path */ 04178 ) 04179 { 04180 FRESULT res; 04181 FATFS_DIR dj; 04182 FATFS *fs; 04183 UINT i, n; 04184 DWORD ccl; 04185 TCHAR *tp; 04186 FILINFO fno; 04187 DEF_NAMBUF 04188 04189 04190 *buff = 0; 04191 /* Get logical drive */ 04192 res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */ 04193 if (res == FR_OK) { 04194 dj.obj.fs = fs; 04195 INIT_NAMBUF(fs); 04196 i = len; /* Bottom of buffer (directory stack base) */ 04197 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */ 04198 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */ 04199 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */ 04200 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */ 04201 if (res != FR_OK) break; 04202 res = move_window(fs, dj.sect); 04203 if (res != FR_OK) break; 04204 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */ 04205 res = dir_sdi(&dj, 0); 04206 if (res != FR_OK) break; 04207 do { /* Find the entry links to the child directory */ 04208 res = dir_read_file(&dj); 04209 if (res != FR_OK) break; 04210 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */ 04211 res = dir_next(&dj, 0); 04212 } while (res == FR_OK); 04213 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */ 04214 if (res != FR_OK) break; 04215 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */ 04216 for (n = 0; fno.fname[n]; n++) ; 04217 if (i < n + 3) { 04218 res = FR_NOT_ENOUGH_CORE; break; 04219 } 04220 while (n) buff[--i] = fno.fname[--n]; 04221 buff[--i] = '/'; 04222 } 04223 } 04224 tp = buff; 04225 if (res == FR_OK) { 04226 #if FF_VOLUMES >= 2 04227 *tp++ = '0' + CurrVol; /* Put drive number */ 04228 *tp++ = ':'; 04229 #endif 04230 if (i == len) { /* Root-directory */ 04231 *tp++ = '/'; 04232 } else { /* Sub-directroy */ 04233 do /* Add stacked path str */ 04234 *tp++ = buff[i++]; 04235 while (i < len); 04236 } 04237 } 04238 *tp = 0; 04239 FREE_NAMBUF(); 04240 } 04241 04242 LEAVE_FF(fs, res); 04243 } 04244 04245 #endif /* FF_FS_RPATH >= 2 */ 04246 #endif /* FF_FS_RPATH >= 1 */ 04247 04248 04249 04250 #if FF_FS_MINIMIZE <= 2 04251 /*-----------------------------------------------------------------------*/ 04252 /* Seek File Read/Write Pointer */ 04253 /*-----------------------------------------------------------------------*/ 04254 04255 FRESULT f_lseek ( 04256 FIL* fp, /* Pointer to the file object */ 04257 FSIZE_t ofs /* File pointer from top of file */ 04258 ) 04259 { 04260 FRESULT res; 04261 FATFS *fs; 04262 DWORD clst, bcs, nsect; 04263 FSIZE_t ifptr; 04264 #if FF_USE_FASTSEEK 04265 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl; 04266 #endif 04267 04268 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 04269 if (res == FR_OK) res = (FRESULT)fp->err; 04270 #if FF_FS_EXFAT && !FF_FS_READONLY 04271 if (res == FR_OK && fs->fs_type == FS_EXFAT) { 04272 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */ 04273 } 04274 #endif 04275 if (res != FR_OK) LEAVE_FF(fs, res); 04276 04277 #if FF_USE_FASTSEEK 04278 if (fp->cltbl) { /* Fast seek */ 04279 if (ofs == CREATE_LINKMAP) { /* Create CLMT */ 04280 tbl = fp->cltbl; 04281 tlen = *tbl++; ulen = 2; /* Given table size and required table size */ 04282 cl = fp->obj.sclust; /* Origin of the chain */ 04283 if (cl != 0) { 04284 do { 04285 /* Get a fragment */ 04286 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */ 04287 do { 04288 pcl = cl; ncl++; 04289 cl = get_fat(&fp->obj, cl); 04290 if (cl <= 1) ABORT(fs, FR_INT_ERR); 04291 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04292 } while (cl == pcl + 1); 04293 if (ulen <= tlen) { /* Store the length and top of the fragment */ 04294 *tbl++ = ncl; *tbl++ = tcl; 04295 } 04296 } while (cl < fs->n_fatent); /* Repeat until end of chain */ 04297 } 04298 *fp->cltbl = ulen; /* Number of items used */ 04299 if (ulen <= tlen) { 04300 *tbl = 0; /* Terminate table */ 04301 } else { 04302 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */ 04303 } 04304 } else { /* Fast seek */ 04305 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */ 04306 fp->fptr = ofs; /* Set file pointer */ 04307 if (ofs > 0) { 04308 fp->clust = clmt_clust(fp, ofs - 1); 04309 dsc = clst2sect(fs, fp->clust); 04310 if (dsc == 0) ABORT(fs, FR_INT_ERR); 04311 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1); 04312 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */ 04313 #if !FF_FS_TINY 04314 #if !FF_FS_READONLY 04315 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 04316 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 04317 fp->flag &= (BYTE)~FA_DIRTY; 04318 } 04319 #endif 04320 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */ 04321 #endif 04322 fp->sect = dsc; 04323 } 04324 } 04325 } 04326 } else 04327 #endif 04328 04329 /* Normal Seek */ 04330 { 04331 #if FF_FS_EXFAT 04332 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */ 04333 #endif 04334 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */ 04335 ofs = fp->obj.objsize; 04336 } 04337 ifptr = fp->fptr; 04338 fp->fptr = nsect = 0; 04339 if (ofs > 0) { 04340 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */ 04341 if (ifptr > 0 && 04342 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */ 04343 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */ 04344 ofs -= fp->fptr; 04345 clst = fp->clust; 04346 } else { /* When seek to back cluster, */ 04347 clst = fp->obj.sclust; /* start from the first cluster */ 04348 #if !FF_FS_READONLY 04349 if (clst == 0) { /* If no cluster chain, create a new chain */ 04350 clst = create_chain(&fp->obj, 0); 04351 if (clst == 1) ABORT(fs, FR_INT_ERR); 04352 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04353 fp->obj.sclust = clst; 04354 } 04355 #endif 04356 fp->clust = clst; 04357 } 04358 if (clst != 0) { 04359 while (ofs > bcs) { /* Cluster following loop */ 04360 ofs -= bcs; fp->fptr += bcs; 04361 #if !FF_FS_READONLY 04362 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */ 04363 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */ 04364 fp->obj.objsize = fp->fptr; 04365 fp->flag |= FA_MODIFIED; 04366 } 04367 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */ 04368 if (clst == 0) { /* Clip file size in case of disk full */ 04369 ofs = 0; break; 04370 } 04371 } else 04372 #endif 04373 { 04374 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */ 04375 } 04376 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 04377 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR); 04378 fp->clust = clst; 04379 } 04380 fp->fptr += ofs; 04381 if (ofs % SS(fs)) { 04382 nsect = clst2sect(fs, clst); /* Current sector */ 04383 if (nsect == 0) ABORT(fs, FR_INT_ERR); 04384 nsect += (DWORD)(ofs / SS(fs)); 04385 } 04386 } 04387 } 04388 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */ 04389 fp->obj.objsize = fp->fptr; 04390 fp->flag |= FA_MODIFIED; 04391 } 04392 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */ 04393 #if !FF_FS_TINY 04394 #if !FF_FS_READONLY 04395 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 04396 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 04397 fp->flag &= (BYTE)~FA_DIRTY; 04398 } 04399 #endif 04400 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */ 04401 #endif 04402 fp->sect = nsect; 04403 } 04404 } 04405 04406 LEAVE_FF(fs, res); 04407 } 04408 04409 04410 04411 #if FF_FS_MINIMIZE <= 1 04412 /*-----------------------------------------------------------------------*/ 04413 /* Create a Directory Object */ 04414 /*-----------------------------------------------------------------------*/ 04415 04416 FRESULT f_opendir ( 04417 FATFS_DIR* dp, /* Pointer to directory object to create */ 04418 const TCHAR* path /* Pointer to the directory path */ 04419 ) 04420 { 04421 FRESULT res; 04422 FATFS *fs; 04423 DEF_NAMBUF 04424 04425 04426 if (!dp) return FR_INVALID_OBJECT; 04427 04428 /* Get logical drive */ 04429 res = find_volume(&path, &fs, 0); 04430 if (res == FR_OK) { 04431 dp->obj.fs = fs; 04432 INIT_NAMBUF(fs); 04433 res = follow_path(dp, path); /* Follow the path to the directory */ 04434 if (res == FR_OK) { /* Follow completed */ 04435 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */ 04436 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */ 04437 #if FF_FS_EXFAT 04438 if (fs->fs_type == FS_EXFAT) { 04439 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */ 04440 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat; 04441 dp->obj.c_ofs = dp->blk_ofs; 04442 init_alloc_info(fs, &dp->obj); /* Get object allocation info */ 04443 } else 04444 #endif 04445 { 04446 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */ 04447 } 04448 } else { /* This object is a file */ 04449 res = FR_NO_PATH; 04450 } 04451 } 04452 if (res == FR_OK) { 04453 dp->obj.id = fs->id; 04454 res = dir_sdi(dp, 0); /* Rewind directory */ 04455 #if FF_FS_LOCK != 0 04456 if (res == FR_OK) { 04457 if (dp->obj.sclust != 0) { 04458 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */ 04459 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES; 04460 } else { 04461 dp->obj.lockid = 0; /* Root directory need not to be locked */ 04462 } 04463 } 04464 #endif 04465 } 04466 } 04467 FREE_NAMBUF(); 04468 if (res == FR_NO_FILE) res = FR_NO_PATH; 04469 } 04470 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */ 04471 04472 LEAVE_FF(fs, res); 04473 } 04474 04475 04476 04477 04478 /*-----------------------------------------------------------------------*/ 04479 /* Close Directory */ 04480 /*-----------------------------------------------------------------------*/ 04481 04482 FRESULT f_closedir ( 04483 FATFS_DIR *dp /* Pointer to the directory object to be closed */ 04484 ) 04485 { 04486 FRESULT res; 04487 FATFS *fs; 04488 04489 04490 res = validate(&dp->obj, &fs); /* Check validity of the file object */ 04491 if (res == FR_OK) { 04492 #if FF_FS_LOCK != 0 04493 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */ 04494 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */ 04495 #else 04496 dp->obj.fs = 0; /* Invalidate directory object */ 04497 #endif 04498 #if FF_FS_REENTRANT 04499 unlock_fs(fs, FR_OK); /* Unlock volume */ 04500 #endif 04501 } 04502 return res; 04503 } 04504 04505 04506 04507 04508 /*-----------------------------------------------------------------------*/ 04509 /* Read Directory Entries in Sequence */ 04510 /*-----------------------------------------------------------------------*/ 04511 04512 FRESULT f_readdir ( 04513 FATFS_DIR* dp, /* Pointer to the open directory object */ 04514 FILINFO* fno /* Pointer to file information to return */ 04515 ) 04516 { 04517 FRESULT res; 04518 FATFS *fs; 04519 DEF_NAMBUF 04520 04521 04522 res = validate(&dp->obj, &fs); /* Check validity of the directory object */ 04523 if (res == FR_OK) { 04524 if (!fno) { 04525 res = dir_sdi(dp, 0); /* Rewind the directory object */ 04526 } else { 04527 INIT_NAMBUF(fs); 04528 res = dir_read_file(dp); /* Read an item */ 04529 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */ 04530 if (res == FR_OK) { /* A valid entry is found */ 04531 get_fileinfo(dp, fno); /* Get the object information */ 04532 res = dir_next(dp, 0); /* Increment index for next */ 04533 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */ 04534 } 04535 FREE_NAMBUF(); 04536 } 04537 } 04538 LEAVE_FF(fs, res); 04539 } 04540 04541 04542 04543 #if FF_USE_FIND 04544 /*-----------------------------------------------------------------------*/ 04545 /* Find Next File */ 04546 /*-----------------------------------------------------------------------*/ 04547 04548 FRESULT f_findnext ( 04549 FATFS_DIR* dp, /* Pointer to the open directory object */ 04550 FILINFO* fno /* Pointer to the file information structure */ 04551 ) 04552 { 04553 FRESULT res; 04554 04555 04556 for (;;) { 04557 res = f_readdir(dp, fno); /* Get a directory item */ 04558 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */ 04559 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */ 04560 #if FF_USE_LFN && FF_USE_FIND == 2 04561 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */ 04562 #endif 04563 } 04564 return res; 04565 } 04566 04567 04568 04569 /*-----------------------------------------------------------------------*/ 04570 /* Find First File */ 04571 /*-----------------------------------------------------------------------*/ 04572 04573 FRESULT f_findfirst ( 04574 FATFS_DIR* dp, /* Pointer to the blank directory object */ 04575 FILINFO* fno, /* Pointer to the file information structure */ 04576 const TCHAR* path, /* Pointer to the directory to open */ 04577 const TCHAR* pattern /* Pointer to the matching pattern */ 04578 ) 04579 { 04580 FRESULT res; 04581 04582 04583 dp->pat = pattern; /* Save pointer to pattern string */ 04584 res = f_opendir(dp, path); /* Open the target directory */ 04585 if (res == FR_OK) { 04586 res = f_findnext(dp, fno); /* Find the first item */ 04587 } 04588 return res; 04589 } 04590 04591 #endif /* FF_USE_FIND */ 04592 04593 04594 04595 #if FF_FS_MINIMIZE == 0 04596 /*-----------------------------------------------------------------------*/ 04597 /* Get File Status */ 04598 /*-----------------------------------------------------------------------*/ 04599 04600 FRESULT f_stat ( 04601 const TCHAR* path, /* Pointer to the file path */ 04602 FILINFO* fno /* Pointer to file information to return */ 04603 ) 04604 { 04605 FRESULT res; 04606 FATFS_DIR dj; 04607 DEF_NAMBUF 04608 04609 04610 /* Get logical drive */ 04611 res = find_volume(&path, &dj.obj.fs, 0); 04612 if (res == FR_OK) { 04613 INIT_NAMBUF(dj.obj.fs); 04614 res = follow_path(&dj, path); /* Follow the file path */ 04615 if (res == FR_OK) { /* Follow completed */ 04616 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */ 04617 res = FR_INVALID_NAME; 04618 } else { /* Found an object */ 04619 if (fno) get_fileinfo(&dj, fno); 04620 } 04621 } 04622 FREE_NAMBUF(); 04623 } 04624 04625 LEAVE_FF(dj.obj.fs, res); 04626 } 04627 04628 04629 04630 #if !FF_FS_READONLY 04631 /*-----------------------------------------------------------------------*/ 04632 /* Get Number of Free Clusters */ 04633 /*-----------------------------------------------------------------------*/ 04634 04635 FRESULT f_getfree ( 04636 const TCHAR* path, /* Logical drive number */ 04637 DWORD* nclst, /* Pointer to a variable to return number of free clusters */ 04638 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */ 04639 ) 04640 { 04641 FRESULT res; 04642 FATFS *fs; 04643 DWORD nfree, clst, sect, stat; 04644 UINT i; 04645 FFOBJID obj; 04646 04647 04648 /* Get logical drive */ 04649 res = find_volume(&path, &fs, 0); 04650 if (res == FR_OK) { 04651 *fatfs = fs; /* Return ptr to the fs object */ 04652 /* If free_clst is valid, return it without full FAT scan */ 04653 if (fs->free_clst <= fs->n_fatent - 2) { 04654 *nclst = fs->free_clst; 04655 } else { 04656 /* Scan FAT to obtain number of free clusters */ 04657 nfree = 0; 04658 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */ 04659 clst = 2; obj.fs = fs; 04660 do { 04661 stat = get_fat(&obj, clst); 04662 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 04663 if (stat == 1) { res = FR_INT_ERR; break; } 04664 if (stat == 0) nfree++; 04665 } while (++clst < fs->n_fatent); 04666 } else { 04667 #if FF_FS_EXFAT 04668 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */ 04669 BYTE bm; 04670 UINT b; 04671 04672 clst = fs->n_fatent - 2; /* Number of clusters */ 04673 sect = fs->database; /* Assuming bitmap starts at cluster 2 */ 04674 i = 0; /* Offset in the sector */ 04675 do { /* Counts numbuer of bits with zero in the bitmap */ 04676 if (i == 0) { 04677 res = move_window(fs, sect++); 04678 if (res != FR_OK) break; 04679 } 04680 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) { 04681 if (!(bm & 1)) nfree++; 04682 bm >>= 1; 04683 } 04684 i = (i + 1) % SS(fs); 04685 } while (clst); 04686 } else 04687 #endif 04688 { /* FAT16/32: Scan WORD/DWORD FAT entries */ 04689 clst = fs->n_fatent; /* Number of entries */ 04690 sect = fs->fatbase; /* Top of the FAT */ 04691 i = 0; /* Offset in the sector */ 04692 do { /* Counts numbuer of entries with zero in the FAT */ 04693 if (i == 0) { 04694 res = move_window(fs, sect++); 04695 if (res != FR_OK) break; 04696 } 04697 if (fs->fs_type == FS_FAT16) { 04698 if (ld_word(fs->win + i) == 0) nfree++; 04699 i += 2; 04700 } else { 04701 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++; 04702 i += 4; 04703 } 04704 i %= SS(fs); 04705 } while (--clst); 04706 } 04707 } 04708 *nclst = nfree; /* Return the free clusters */ 04709 fs->free_clst = nfree; /* Now free_clst is valid */ 04710 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */ 04711 } 04712 } 04713 04714 LEAVE_FF(fs, res); 04715 } 04716 04717 04718 04719 04720 /*-----------------------------------------------------------------------*/ 04721 /* Truncate File */ 04722 /*-----------------------------------------------------------------------*/ 04723 04724 FRESULT f_truncate ( 04725 FIL* fp /* Pointer to the file object */ 04726 ) 04727 { 04728 FRESULT res; 04729 FATFS *fs; 04730 DWORD ncl; 04731 04732 04733 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 04734 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 04735 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 04736 04737 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */ 04738 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */ 04739 res = remove_chain(&fp->obj, fp->obj.sclust, 0); 04740 fp->obj.sclust = 0; 04741 } else { /* When truncate a part of the file, remove remaining clusters */ 04742 ncl = get_fat(&fp->obj, fp->clust); 04743 res = FR_OK; 04744 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR; 04745 if (ncl == 1) res = FR_INT_ERR; 04746 if (res == FR_OK && ncl < fs->n_fatent) { 04747 res = remove_chain(&fp->obj, ncl, fp->clust); 04748 } 04749 } 04750 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */ 04751 fp->flag |= FA_MODIFIED; 04752 #if !FF_FS_TINY 04753 if (res == FR_OK && (fp->flag & FA_DIRTY)) { 04754 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) { 04755 res = FR_DISK_ERR; 04756 } else { 04757 fp->flag &= (BYTE)~FA_DIRTY; 04758 } 04759 } 04760 #endif 04761 if (res != FR_OK) ABORT(fs, res); 04762 } 04763 04764 LEAVE_FF(fs, res); 04765 } 04766 04767 04768 04769 04770 /*-----------------------------------------------------------------------*/ 04771 /* Delete a File/Directory */ 04772 /*-----------------------------------------------------------------------*/ 04773 04774 FRESULT f_unlink ( 04775 const TCHAR* path /* Pointer to the file or directory path */ 04776 ) 04777 { 04778 FRESULT res; 04779 FATFS_DIR dj, sdj; 04780 DWORD dclst = 0; 04781 FATFS *fs; 04782 #if FF_FS_EXFAT 04783 FFOBJID obj; 04784 #endif 04785 DEF_NAMBUF 04786 04787 04788 /* Get logical drive */ 04789 res = find_volume(&path, &fs, FA_WRITE); 04790 if (res == FR_OK) { 04791 dj.obj.fs = fs; 04792 INIT_NAMBUF(fs); 04793 res = follow_path(&dj, path); /* Follow the file path */ 04794 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) { 04795 res = FR_INVALID_NAME; /* Cannot remove dot entry */ 04796 } 04797 #if FF_FS_LOCK != 0 04798 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */ 04799 #endif 04800 if (res == FR_OK) { /* The object is accessible */ 04801 if (dj.fn[NSFLAG] & NS_NONAME) { 04802 res = FR_INVALID_NAME; /* Cannot remove the origin directory */ 04803 } else { 04804 if (dj.obj.attr & AM_RDO) { 04805 res = FR_DENIED; /* Cannot remove R/O object */ 04806 } 04807 } 04808 if (res == FR_OK) { 04809 #if FF_FS_EXFAT 04810 obj.fs = fs; 04811 if (fs->fs_type == FS_EXFAT) { 04812 init_alloc_info(fs, &obj); 04813 dclst = obj.sclust; 04814 } else 04815 #endif 04816 { 04817 dclst = ld_clust(fs, dj.dir); 04818 } 04819 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */ 04820 #if FF_FS_RPATH != 0 04821 if (dclst == fs->cdir) { /* Is it the current directory? */ 04822 res = FR_DENIED; 04823 } else 04824 #endif 04825 { 04826 sdj.obj.fs = fs; /* Open the sub-directory */ 04827 sdj.obj.sclust = dclst; 04828 #if FF_FS_EXFAT 04829 if (fs->fs_type == FS_EXFAT) { 04830 sdj.obj.objsize = obj.objsize; 04831 sdj.obj.stat = obj.stat; 04832 } 04833 #endif 04834 res = dir_sdi(&sdj, 0); 04835 if (res == FR_OK) { 04836 res = dir_read_file(&sdj); /* Test if the directory is empty */ 04837 if (res == FR_OK) res = FR_DENIED; /* Not empty? */ 04838 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */ 04839 } 04840 } 04841 } 04842 } 04843 if (res == FR_OK) { 04844 res = dir_remove(&dj); /* Remove the directory entry */ 04845 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */ 04846 #if FF_FS_EXFAT 04847 res = remove_chain(&obj, dclst, 0); 04848 #else 04849 res = remove_chain(&dj.obj, dclst, 0); 04850 #endif 04851 } 04852 if (res == FR_OK) res = sync_fs(fs); 04853 } 04854 } 04855 FREE_NAMBUF(); 04856 } 04857 04858 LEAVE_FF(fs, res); 04859 } 04860 04861 04862 04863 04864 /*-----------------------------------------------------------------------*/ 04865 /* Create a Directory */ 04866 /*-----------------------------------------------------------------------*/ 04867 04868 FRESULT f_mkdir ( 04869 const TCHAR* path /* Pointer to the directory path */ 04870 ) 04871 { 04872 FRESULT res; 04873 FATFS_DIR dj; 04874 FATFS *fs; 04875 BYTE *dir; 04876 DWORD dcl, pcl, tm; 04877 DEF_NAMBUF 04878 04879 04880 /* Get logical drive */ 04881 res = find_volume(&path, &fs, FA_WRITE); 04882 if (res == FR_OK) { 04883 dj.obj.fs = fs; 04884 INIT_NAMBUF(fs); 04885 res = follow_path(&dj, path); /* Follow the file path */ 04886 if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */ 04887 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { 04888 res = FR_INVALID_NAME; 04889 } 04890 if (res == FR_NO_FILE) { /* Can create a new directory */ 04891 dcl = create_chain(&dj.obj, 0); /* Allocate a cluster for the new directory table */ 04892 dj.obj.objsize = (DWORD)fs->csize * SS(fs); 04893 res = FR_OK; 04894 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */ 04895 if (dcl == 1) res = FR_INT_ERR; 04896 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; 04897 if (res == FR_OK) res = sync_window(fs); /* Flush FAT */ 04898 tm = GET_FATTIME(); 04899 if (res == FR_OK) { /* Initialize the new directory table */ 04900 res = dir_clear(fs, dcl); /* Clean up the new table */ 04901 if (res == FR_OK && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT)) { /* Create dot entries (FAT only) */ 04902 dir = fs->win; 04903 mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */ 04904 dir[DIR_Name] = '.'; 04905 dir[DIR_Attr] = AM_DIR; 04906 st_dword(dir + DIR_ModTime, tm); 04907 st_clust(fs, dir, dcl); 04908 mem_cpy(dir + SZDIRE, dir, SZDIRE); /* Create ".." entry */ 04909 dir[SZDIRE + 1] = '.'; pcl = dj.obj.sclust; 04910 st_clust(fs, dir + SZDIRE, pcl); 04911 fs->wflag = 1; 04912 } 04913 } 04914 if (res == FR_OK) { 04915 res = dir_register(&dj); /* Register the object to the directoy */ 04916 } 04917 if (res == FR_OK) { 04918 #if FF_FS_EXFAT 04919 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */ 04920 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */ 04921 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */ 04922 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)dj.obj.objsize); /* File size needs to be valid */ 04923 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)dj.obj.objsize); 04924 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */ 04925 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */ 04926 res = store_xdir(&dj); 04927 } else 04928 #endif 04929 { 04930 dir = dj.dir; 04931 st_dword(dir + DIR_ModTime, tm); /* Created time */ 04932 st_clust(fs, dir, dcl); /* Table start cluster */ 04933 dir[DIR_Attr] = AM_DIR; /* Attribute */ 04934 fs->wflag = 1; 04935 } 04936 if (res == FR_OK) { 04937 res = sync_fs(fs); 04938 } 04939 } else { 04940 remove_chain(&dj.obj, dcl, 0); /* Could not register, remove cluster chain */ 04941 } 04942 } 04943 FREE_NAMBUF(); 04944 } 04945 04946 LEAVE_FF(fs, res); 04947 } 04948 04949 04950 04951 04952 /*-----------------------------------------------------------------------*/ 04953 /* Rename a File/Directory */ 04954 /*-----------------------------------------------------------------------*/ 04955 04956 FRESULT f_rename ( 04957 const TCHAR* path_old, /* Pointer to the object name to be renamed */ 04958 const TCHAR* path_new /* Pointer to the new name */ 04959 ) 04960 { 04961 FRESULT res; 04962 FATFS_DIR djo, djn; 04963 FATFS *fs; 04964 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir; 04965 DWORD dw; 04966 DEF_NAMBUF 04967 04968 04969 get_ldnumber(&path_new); /* Snip the drive number of new name off */ 04970 res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */ 04971 if (res == FR_OK) { 04972 djo.obj.fs = fs; 04973 INIT_NAMBUF(fs); 04974 res = follow_path(&djo, path_old); /* Check old object */ 04975 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */ 04976 #if FF_FS_LOCK != 0 04977 if (res == FR_OK) { 04978 res = chk_lock(&djo, 2); 04979 } 04980 #endif 04981 if (res == FR_OK) { /* Object to be renamed is found */ 04982 #if FF_FS_EXFAT 04983 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */ 04984 BYTE nf, nn; 04985 WORD nh; 04986 04987 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */ 04988 mem_cpy(&djn, &djo, sizeof djo); 04989 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 04990 if (res == FR_OK) { /* Is new name already in use by any other object? */ 04991 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 04992 } 04993 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 04994 res = dir_register(&djn); /* Register the new entry */ 04995 if (res == FR_OK) { 04996 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName]; 04997 nh = ld_word(fs->dirbuf + XDIR_NameHash); 04998 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */ 04999 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn; 05000 st_word(fs->dirbuf + XDIR_NameHash, nh); 05001 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 05002 /* Start of critical section where an interruption can cause a cross-link */ 05003 res = store_xdir(&djn); 05004 } 05005 } 05006 } else 05007 #endif 05008 { /* At FAT/FAT32 volume */ 05009 mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */ 05010 mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */ 05011 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */ 05012 if (res == FR_OK) { /* Is new name already in use by any other object? */ 05013 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST; 05014 } 05015 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */ 05016 res = dir_register(&djn); /* Register the new entry */ 05017 if (res == FR_OK) { 05018 dir = djn.dir; /* Copy directory entry of the object except name */ 05019 mem_cpy(dir + 13, buf + 13, SZDIRE - 13); 05020 dir[DIR_Attr] = buf[DIR_Attr]; 05021 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */ 05022 fs->wflag = 1; 05023 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */ 05024 dw = clst2sect(fs, ld_clust(fs, dir)); 05025 if (dw == 0) { 05026 res = FR_INT_ERR; 05027 } else { 05028 /* Start of critical section where an interruption can cause a cross-link */ 05029 res = move_window(fs, dw); 05030 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */ 05031 if (res == FR_OK && dir[1] == '.') { 05032 st_clust(fs, dir, djn.obj.sclust); 05033 fs->wflag = 1; 05034 } 05035 } 05036 } 05037 } 05038 } 05039 } 05040 if (res == FR_OK) { 05041 res = dir_remove(&djo); /* Remove old entry */ 05042 if (res == FR_OK) { 05043 res = sync_fs(fs); 05044 } 05045 } 05046 /* End of the critical section */ 05047 } 05048 FREE_NAMBUF(); 05049 } 05050 05051 LEAVE_FF(fs, res); 05052 } 05053 05054 #endif /* !FF_FS_READONLY */ 05055 #endif /* FF_FS_MINIMIZE == 0 */ 05056 #endif /* FF_FS_MINIMIZE <= 1 */ 05057 #endif /* FF_FS_MINIMIZE <= 2 */ 05058 05059 05060 05061 #if FF_USE_CHMOD && !FF_FS_READONLY 05062 /*-----------------------------------------------------------------------*/ 05063 /* Change Attribute */ 05064 /*-----------------------------------------------------------------------*/ 05065 05066 FRESULT f_chmod ( 05067 const TCHAR* path, /* Pointer to the file path */ 05068 BYTE attr, /* Attribute bits */ 05069 BYTE mask /* Attribute mask to change */ 05070 ) 05071 { 05072 FRESULT res; 05073 FATFS_DIR dj; 05074 FATFS *fs; 05075 DEF_NAMBUF 05076 05077 05078 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 05079 if (res == FR_OK) { 05080 dj.obj.fs = fs; 05081 INIT_NAMBUF(fs); 05082 res = follow_path(&dj, path); /* Follow the file path */ 05083 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 05084 if (res == FR_OK) { 05085 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */ 05086 #if FF_FS_EXFAT 05087 if (fs->fs_type == FS_EXFAT) { 05088 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 05089 res = store_xdir(&dj); 05090 } else 05091 #endif 05092 { 05093 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */ 05094 fs->wflag = 1; 05095 } 05096 if (res == FR_OK) { 05097 res = sync_fs(fs); 05098 } 05099 } 05100 FREE_NAMBUF(); 05101 } 05102 05103 LEAVE_FF(fs, res); 05104 } 05105 05106 05107 05108 05109 /*-----------------------------------------------------------------------*/ 05110 /* Change Timestamp */ 05111 /*-----------------------------------------------------------------------*/ 05112 05113 FRESULT f_utime ( 05114 const TCHAR* path, /* Pointer to the file/directory name */ 05115 const FILINFO* fno /* Pointer to the timestamp to be set */ 05116 ) 05117 { 05118 FRESULT res; 05119 FATFS_DIR dj; 05120 FATFS *fs; 05121 DEF_NAMBUF 05122 05123 05124 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */ 05125 if (res == FR_OK) { 05126 dj.obj.fs = fs; 05127 INIT_NAMBUF(fs); 05128 res = follow_path(&dj, path); /* Follow the file path */ 05129 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */ 05130 if (res == FR_OK) { 05131 #if FF_FS_EXFAT 05132 if (fs->fs_type == FS_EXFAT) { 05133 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 05134 res = store_xdir(&dj); 05135 } else 05136 #endif 05137 { 05138 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime); 05139 fs->wflag = 1; 05140 } 05141 if (res == FR_OK) { 05142 res = sync_fs(fs); 05143 } 05144 } 05145 FREE_NAMBUF(); 05146 } 05147 05148 LEAVE_FF(fs, res); 05149 } 05150 05151 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */ 05152 05153 05154 05155 #if FF_USE_LABEL 05156 /*-----------------------------------------------------------------------*/ 05157 /* Get Volume Label */ 05158 /*-----------------------------------------------------------------------*/ 05159 05160 FRESULT f_getlabel ( 05161 const TCHAR* path, /* Logical drive number */ 05162 TCHAR* label, /* Buffer to store the volume label */ 05163 DWORD* vsn /* Variable to store the volume serial number */ 05164 ) 05165 { 05166 FRESULT res; 05167 FATFS_DIR dj; 05168 FATFS *fs; 05169 UINT si, di; 05170 WCHAR wc; 05171 05172 /* Get logical drive */ 05173 res = find_volume(&path, &fs, 0); 05174 05175 /* Get volume label */ 05176 if (res == FR_OK && label) { 05177 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 05178 res = dir_sdi(&dj, 0); 05179 if (res == FR_OK) { 05180 res = dir_read_label(&dj); /* Find a volume label entry */ 05181 if (res == FR_OK) { 05182 #if FF_FS_EXFAT 05183 if (fs->fs_type == FS_EXFAT) { 05184 WCHAR hs; 05185 05186 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */ 05187 wc = ld_word(dj.dir + XDIR_Label + si * 2); 05188 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */ 05189 hs = wc; continue; 05190 } 05191 wc = put_utf((DWORD)hs << 16 | wc, &label[di], 4); 05192 if (wc == 0) { di = 0; break; } 05193 di += wc; 05194 hs = 0; 05195 } 05196 if (hs != 0) di = 0; /* Broken surrogate pair? */ 05197 label[di] = 0; 05198 } else 05199 #endif 05200 { 05201 si = di = 0; /* Extract volume label from AM_VOL entry */ 05202 while (si < 11) { 05203 wc = dj.dir[si++]; 05204 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */ 05205 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */ 05206 wc = ff_oem2uni(wc, CODEPAGE); 05207 if (wc != 0) wc = put_utf(wc, &label[di], 4); 05208 if (wc == 0) { di = 0; break; } 05209 di += wc; 05210 #else /* ANSI/OEM output */ 05211 label[di++] = (TCHAR)wc; 05212 #endif 05213 } 05214 do { /* Truncate trailing spaces */ 05215 label[di] = 0; 05216 if (di == 0) break; 05217 } while (label[--di] == ' '); 05218 } 05219 } 05220 } 05221 if (res == FR_NO_FILE) { /* No label entry and return nul string */ 05222 label[0] = 0; 05223 res = FR_OK; 05224 } 05225 } 05226 05227 /* Get volume serial number */ 05228 if (res == FR_OK && vsn) { 05229 res = move_window(fs, fs->volbase); 05230 if (res == FR_OK) { 05231 switch (fs->fs_type) { 05232 case FS_EXFAT: 05233 di = BPB_VolIDEx; break; 05234 05235 case FS_FAT32: 05236 di = BS_VolID32; break; 05237 05238 default: 05239 di = BS_VolID; 05240 } 05241 *vsn = ld_dword(fs->win + di); 05242 } 05243 } 05244 05245 LEAVE_FF(fs, res); 05246 } 05247 05248 05249 05250 #if !FF_FS_READONLY 05251 /*-----------------------------------------------------------------------*/ 05252 /* Set Volume Label */ 05253 /*-----------------------------------------------------------------------*/ 05254 05255 FRESULT f_setlabel ( 05256 const TCHAR* label /* Volume label to set with heading logical drive number */ 05257 ) 05258 { 05259 FRESULT res; 05260 FATFS_DIR dj; 05261 FATFS *fs; 05262 BYTE dirvn[22]; 05263 UINT di; 05264 WCHAR wc; 05265 static const char badchr[] = "+.,;=[]\"*:<>\?|\x7F"; /* [0..] for FAT, [7..] for exFAT */ 05266 #if FF_USE_LFN 05267 DWORD dc; 05268 #endif 05269 05270 /* Get logical drive */ 05271 res = find_volume(&label, &fs, FA_WRITE); 05272 if (res != FR_OK) LEAVE_FF(fs, res); 05273 05274 #if FF_FS_EXFAT 05275 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */ 05276 mem_set(dirvn, 0, 22); 05277 di = 0; 05278 while (*label) { /* Create volume label in directory form */ 05279 dc = tchar2uni(&label); /* Get a Unicode character */ 05280 if (dc >= 0x10000) { 05281 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */ 05282 dc = 0; 05283 } else { 05284 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++; 05285 } 05286 } 05287 if (dc == 0 || chk_chr(badchr + 7, (int)dc) || di >= 11) { /* Check validity of the volume label */ 05288 LEAVE_FF(fs, FR_INVALID_NAME); 05289 } 05290 st_word(dirvn + di * 2, (WCHAR)dc); di++; 05291 } 05292 } else 05293 #endif 05294 { /* On the FAT/FAT32 volume */ 05295 mem_set(dirvn, ' ', 11); 05296 di = 0; 05297 while (*label) { /* Create volume label in directory form */ 05298 #if FF_USE_LFN 05299 dc = tchar2uni(&label); 05300 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0; 05301 #else /* ANSI/OEM input */ 05302 wc = (BYTE)*label++; 05303 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0; 05304 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */ 05305 #if FF_CODE_PAGE == 0 05306 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 05307 #elif FF_CODE_PAGE < 900 05308 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */ 05309 #endif 05310 #endif 05311 if (wc == 0 || chk_chr(badchr + 0, (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */ 05312 LEAVE_FF(fs, FR_INVALID_NAME); 05313 } 05314 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8); 05315 dirvn[di++] = (BYTE)wc; 05316 } 05317 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */ 05318 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */ 05319 } 05320 05321 /* Set volume label */ 05322 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */ 05323 res = dir_sdi(&dj, 0); 05324 if (res == FR_OK) { 05325 res = dir_read_label(&dj); /* Get volume label entry */ 05326 if (res == FR_OK) { 05327 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 05328 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */ 05329 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 05330 } else { 05331 if (di != 0) { 05332 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */ 05333 } else { 05334 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */ 05335 } 05336 } 05337 fs->wflag = 1; 05338 res = sync_fs(fs); 05339 } else { /* No volume label entry or an error */ 05340 if (res == FR_NO_FILE) { 05341 res = FR_OK; 05342 if (di != 0) { /* Create a volume label entry */ 05343 res = dir_alloc(&dj, 1); /* Allocate an entry */ 05344 if (res == FR_OK) { 05345 mem_set(dj.dir, 0, SZDIRE); /* Clean the entry */ 05346 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { 05347 dj.dir[XDIR_Type] = 0x83; /* Create 83 entry */ 05348 dj.dir[XDIR_NumLabel] = (BYTE)di; 05349 mem_cpy(dj.dir + XDIR_Label, dirvn, 22); 05350 } else { 05351 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */ 05352 mem_cpy(dj.dir, dirvn, 11); 05353 } 05354 fs->wflag = 1; 05355 res = sync_fs(fs); 05356 } 05357 } 05358 } 05359 } 05360 } 05361 05362 LEAVE_FF(fs, res); 05363 } 05364 05365 #endif /* !FF_FS_READONLY */ 05366 #endif /* FF_USE_LABEL */ 05367 05368 05369 05370 #if FF_USE_EXPAND && !FF_FS_READONLY 05371 /*-----------------------------------------------------------------------*/ 05372 /* Allocate a Contiguous Blocks to the File */ 05373 /*-----------------------------------------------------------------------*/ 05374 05375 FRESULT f_expand ( 05376 FIL* fp, /* Pointer to the file object */ 05377 FSIZE_t fsz, /* File size to be expanded to */ 05378 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */ 05379 ) 05380 { 05381 FRESULT res; 05382 FATFS *fs; 05383 DWORD n, clst, stcl, scl, ncl, tcl, lclst; 05384 05385 05386 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 05387 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 05388 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); 05389 #if FF_FS_EXFAT 05390 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */ 05391 #endif 05392 n = (DWORD)fs->csize * SS(fs); /* Cluster size */ 05393 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */ 05394 stcl = fs->last_clst; lclst = 0; 05395 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2; 05396 05397 #if FF_FS_EXFAT 05398 if (fs->fs_type == FS_EXFAT) { 05399 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */ 05400 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */ 05401 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR; 05402 if (res == FR_OK) { /* A contiguous free area is found */ 05403 if (opt) { /* Allocate it now */ 05404 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */ 05405 lclst = scl + tcl - 1; 05406 } else { /* Set it as suggested point for next allocation */ 05407 lclst = scl - 1; 05408 } 05409 } 05410 } else 05411 #endif 05412 { 05413 scl = clst = stcl; ncl = 0; 05414 for (;;) { /* Find a contiguous cluster block */ 05415 n = get_fat(&fp->obj, clst); 05416 if (++clst >= fs->n_fatent) clst = 2; 05417 if (n == 1) { res = FR_INT_ERR; break; } 05418 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } 05419 if (n == 0) { /* Is it a free cluster? */ 05420 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */ 05421 } else { 05422 scl = clst; ncl = 0; /* Not a free cluster */ 05423 } 05424 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */ 05425 } 05426 if (res == FR_OK) { /* A contiguous free area is found */ 05427 if (opt) { /* Allocate it now */ 05428 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */ 05429 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1); 05430 if (res != FR_OK) break; 05431 lclst = clst; 05432 } 05433 } else { /* Set it as suggested point for next allocation */ 05434 lclst = scl - 1; 05435 } 05436 } 05437 } 05438 05439 if (res == FR_OK) { 05440 fs->last_clst = lclst; /* Set suggested start cluster to start next */ 05441 if (opt) { /* Is it allocated now? */ 05442 fp->obj.sclust = scl; /* Update object allocation information */ 05443 fp->obj.objsize = fsz; 05444 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */ 05445 fp->flag |= FA_MODIFIED; 05446 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */ 05447 fs->free_clst -= tcl; 05448 fs->fsi_flag |= 1; 05449 } 05450 } 05451 } 05452 05453 LEAVE_FF(fs, res); 05454 } 05455 05456 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */ 05457 05458 05459 05460 #if FF_USE_FORWARD 05461 /*-----------------------------------------------------------------------*/ 05462 /* Forward Data to the Stream Directly */ 05463 /*-----------------------------------------------------------------------*/ 05464 05465 FRESULT f_forward ( 05466 FIL* fp, /* Pointer to the file object */ 05467 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */ 05468 UINT btf, /* Number of bytes to forward */ 05469 UINT* bf /* Pointer to number of bytes forwarded */ 05470 ) 05471 { 05472 FRESULT res; 05473 FATFS *fs; 05474 DWORD clst, sect; 05475 FSIZE_t remain; 05476 UINT rcnt, csect; 05477 BYTE *dbuf; 05478 05479 05480 *bf = 0; /* Clear transfer byte counter */ 05481 res = validate(&fp->obj, &fs); /* Check validity of the file object */ 05482 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); 05483 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */ 05484 05485 remain = fp->obj.objsize - fp->fptr; 05486 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */ 05487 05488 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */ 05489 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { 05490 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */ 05491 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */ 05492 if (csect == 0) { /* On the cluster boundary? */ 05493 clst = (fp->fptr == 0) ? /* On the top of the file? */ 05494 fp->obj.sclust : get_fat(&fp->obj, fp->clust); 05495 if (clst <= 1) ABORT(fs, FR_INT_ERR); 05496 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR); 05497 fp->clust = clst; /* Update current cluster */ 05498 } 05499 } 05500 sect = clst2sect(fs, fp->clust); /* Get current data sector */ 05501 if (sect == 0) ABORT(fs, FR_INT_ERR); 05502 sect += csect; 05503 #if FF_FS_TINY 05504 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */ 05505 dbuf = fs->win; 05506 #else 05507 if (fp->sect != sect) { /* Fill sector cache with file data */ 05508 #if !FF_FS_READONLY 05509 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */ 05510 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 05511 fp->flag &= (BYTE)~FA_DIRTY; 05512 } 05513 #endif 05514 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); 05515 } 05516 dbuf = fp->buf; 05517 #endif 05518 fp->sect = sect; 05519 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */ 05520 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */ 05521 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */ 05522 if (rcnt == 0) ABORT(fs, FR_INT_ERR); 05523 } 05524 05525 LEAVE_FF(fs, FR_OK); 05526 } 05527 #endif /* FF_USE_FORWARD */ 05528 05529 05530 05531 #if FF_USE_MKFS && !FF_FS_READONLY 05532 /*-----------------------------------------------------------------------*/ 05533 /* Create an FAT/exFAT volume */ 05534 /*-----------------------------------------------------------------------*/ 05535 05536 FRESULT f_mkfs ( 05537 const TCHAR* path, /* Logical drive number */ 05538 BYTE opt, /* Format option */ 05539 DWORD au, /* Size of allocation unit (cluster) [byte] */ 05540 void* work, /* Pointer to working buffer (null: use heap memory) */ 05541 UINT len /* Size of working buffer [byte] */ 05542 ) 05543 { 05544 const UINT n_fats = 1; /* Number of FATs for FAT/FAT32 volume (1 or 2) */ 05545 const UINT n_rootdir = 512; /* Number of root directory entries for FAT volume */ 05546 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */ 05547 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */ 05548 BYTE fmt, sys, *buf, *pte, pdrv, part; 05549 WORD ss; /* Sector size */ 05550 DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n; 05551 DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */ 05552 DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */ 05553 UINT i; 05554 int vol; 05555 DSTATUS stat; 05556 #if FF_USE_TRIM || FF_FS_EXFAT 05557 DWORD tbl[3]; 05558 #endif 05559 05560 05561 /* Check mounted drive and clear work area */ 05562 vol = get_ldnumber(&path); /* Get target logical drive */ 05563 if (vol < 0) return FR_INVALID_DRIVE; 05564 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the volume if mounted */ 05565 pdrv = LD2PD(vol); /* Physical drive */ 05566 part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */ 05567 05568 /* Check physical drive status */ 05569 stat = disk_initialize(pdrv); 05570 if (stat & STA_NOINIT) return FR_NOT_READY; 05571 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 05572 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 */ 05573 #if FF_MAX_SS != FF_MIN_SS /* Get sector size of the medium if variable sector size cfg. */ 05574 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; 05575 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR; 05576 #else 05577 ss = FF_MAX_SS; 05578 #endif 05579 if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */ 05580 au /= ss; /* Cluster size in unit of sector */ 05581 05582 /* Get working buffer */ 05583 #if FF_USE_LFN == 3 || FF_FS_HEAPBUF 05584 if (!work) { /* Use heap memory for working buffer */ 05585 for (szb_buf = MAX_MALLOC, buf = 0; szb_buf >= ss && !(buf = (BYTE *)ff_memalloc(szb_buf)); szb_buf /= 2) ; 05586 sz_buf = szb_buf / ss; /* Size of working buffer (sector) */ 05587 } else 05588 #endif 05589 { 05590 buf = (BYTE*)work; /* Working buffer */ 05591 sz_buf = len / ss; /* Size of working buffer (sector) */ 05592 szb_buf = sz_buf * ss; /* Size of working buffer (byte) */ 05593 } 05594 if (!buf || sz_buf == 0) return FR_NOT_ENOUGH_CORE; 05595 05596 /* Determine where the volume to be located (b_vol, sz_vol) */ 05597 if (FF_MULTI_PARTITION && part != 0) { 05598 /* Get partition information from partition table in the MBR */ 05599 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */ 05600 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */ 05601 pte = buf + (MBR_Table + (part - 1) * SZ_PTE); 05602 if (pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */ 05603 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */ 05604 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */ 05605 } else { 05606 /* Create a single-partition in this function */ 05607 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05608 b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */ 05609 if (sz_vol < b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); 05610 sz_vol -= b_vol; /* Volume size */ 05611 } 05612 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */ 05613 05614 /* Pre-determine the FAT type */ 05615 do { 05616 if (FF_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */ 05617 if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */ 05618 fmt = FS_EXFAT; break; 05619 } 05620 } 05621 if (au > 128) LEAVE_MKFS(FR_INVALID_PARAMETER); /* Too large au for FAT/FAT32 */ 05622 if (opt & FM_FAT32) { /* FAT32 possible? */ 05623 if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */ 05624 fmt = FS_FAT32; break; 05625 } 05626 } 05627 if (!(opt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */ 05628 fmt = FS_FAT16; 05629 } while (0); 05630 05631 #if FF_FS_EXFAT 05632 if (fmt == FS_EXFAT) { /* Create an exFAT volume */ 05633 DWORD szb_bit, szb_case, sum, nb, cl; 05634 WCHAR ch, si; 05635 UINT j, st; 05636 BYTE b; 05637 05638 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 05639 #if FF_USE_TRIM 05640 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area may be erased */ 05641 disk_ioctl(pdrv, CTRL_TRIM, tbl); 05642 #endif 05643 /* Determine FAT location, data location and number of clusters */ 05644 if (au == 0) { /* au auto-selection */ 05645 au = 8; 05646 if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */ 05647 if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */ 05648 } 05649 b_fat = b_vol + 32; /* FAT start at offset 32 */ 05650 sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */ 05651 b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */ 05652 if (b_data >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */ 05653 n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */ 05654 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */ 05655 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */ 05656 05657 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */ 05658 tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */ 05659 05660 /* Create a compressed up-case table */ 05661 sect = b_data + au * tbl[0]; /* Table start sector */ 05662 sum = 0; /* Table checksum to be stored in the 82 entry */ 05663 st = si = i = j = szb_case = 0; 05664 do { 05665 switch (st) { 05666 case 0: 05667 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */ 05668 if (ch != si) { 05669 si++; break; /* Store the up-case char if exist */ 05670 } 05671 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */ 05672 if (j >= 128) { 05673 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */ 05674 } 05675 st = 1; /* Do not compress short run */ 05676 /* go to next case */ 05677 case 1: 05678 ch = si++; /* Fill the short run */ 05679 if (--j == 0) st = 0; 05680 break; 05681 05682 default: 05683 ch = (WCHAR)j; si += j; /* Number of chars to skip */ 05684 st = 0; 05685 } 05686 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */ 05687 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum); 05688 i += 2; szb_case += 2; 05689 if (si == 0 || i == szb_buf) { /* Write buffered data when buffer full or end of process */ 05690 n = (i + ss - 1) / ss; 05691 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05692 sect += n; i = 0; 05693 } 05694 } while (si); 05695 tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */ 05696 tbl[2] = 1; /* Number of root dir clusters */ 05697 05698 /* Initialize the allocation bitmap */ 05699 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */ 05700 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */ 05701 do { 05702 mem_set(buf, 0, szb_buf); 05703 for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ; 05704 for (b = 1; nb != 0 && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ; 05705 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 05706 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05707 sect += n; nsect -= n; 05708 } while (nsect); 05709 05710 /* Initialize the FAT */ 05711 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */ 05712 j = nb = cl = 0; 05713 do { 05714 mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */ 05715 if (cl == 0) { /* Set entry 0 and 1 */ 05716 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++; 05717 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++; 05718 } 05719 do { /* Create chains of bitmap, up-case and root dir */ 05720 while (nb != 0 && i < szb_buf) { /* Create a chain */ 05721 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF); 05722 i += 4; cl++; nb--; 05723 } 05724 if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */ 05725 } while (nb != 0 && i < szb_buf); 05726 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */ 05727 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05728 sect += n; nsect -= n; 05729 } while (nsect); 05730 05731 /* Initialize the root directory */ 05732 mem_set(buf, 0, szb_buf); 05733 buf[SZDIRE * 0 + 0] = 0x83; /* 83 entry (volume label) */ 05734 buf[SZDIRE * 1 + 0] = 0x81; /* 81 entry (allocation bitmap) */ 05735 st_dword(buf + SZDIRE * 1 + 20, 2); 05736 st_dword(buf + SZDIRE * 1 + 24, szb_bit); 05737 buf[SZDIRE * 2 + 0] = 0x82; /* 82 entry (up-case table) */ 05738 st_dword(buf + SZDIRE * 2 + 4, sum); 05739 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); 05740 st_dword(buf + SZDIRE * 2 + 24, szb_case); 05741 sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */ 05742 do { /* Fill root directory sectors */ 05743 n = (nsect > sz_buf) ? sz_buf : nsect; 05744 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05745 mem_set(buf, 0, ss); 05746 sect += n; nsect -= n; 05747 } while (nsect); 05748 05749 /* Create two set of the exFAT VBR blocks */ 05750 sect = b_vol; 05751 for (n = 0; n < 2; n++) { 05752 /* Main record (+0) */ 05753 mem_set(buf, 0, ss); 05754 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */ 05755 st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */ 05756 st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */ 05757 st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */ 05758 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */ 05759 st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */ 05760 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */ 05761 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */ 05762 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */ 05763 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */ 05764 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */ 05765 for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */ 05766 buf[BPB_NumFATsEx] = 1; /* Number of FATs */ 05767 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */ 05768 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */ 05769 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */ 05770 for (i = sum = 0; i < ss; i++) { /* VBR checksum */ 05771 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum); 05772 } 05773 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05774 /* Extended bootstrap record (+1..+8) */ 05775 mem_set(buf, 0, ss); 05776 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */ 05777 for (j = 1; j < 9; j++) { 05778 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 05779 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05780 } 05781 /* OEM/Reserved record (+9..+10) */ 05782 mem_set(buf, 0, ss); 05783 for ( ; j < 11; j++) { 05784 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */ 05785 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05786 } 05787 /* Sum record (+11) */ 05788 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */ 05789 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05790 } 05791 05792 } else 05793 #endif /* FF_FS_EXFAT */ 05794 { /* Create an FAT/FAT32 volume */ 05795 do { 05796 pau = au; 05797 /* Pre-determine number of clusters and FAT sub-type */ 05798 if (fmt == FS_FAT32) { /* FAT32 volume */ 05799 if (pau == 0) { /* au auto-selection */ 05800 n = sz_vol / 0x20000; /* Volume size in unit of 128KS */ 05801 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */ 05802 } 05803 n_clst = sz_vol / pau; /* Number of clusters */ 05804 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */ 05805 sz_rsv = 32; /* Number of reserved sectors */ 05806 sz_dir = 0; /* No static directory */ 05807 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED); 05808 } else { /* FAT volume */ 05809 if (pau == 0) { /* au auto-selection */ 05810 n = sz_vol / 0x1000; /* Volume size in unit of 4KS */ 05811 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */ 05812 } 05813 n_clst = sz_vol / pau; 05814 if (n_clst > MAX_FAT12) { 05815 n = n_clst * 2 + 4; /* FAT size [byte] */ 05816 } else { 05817 fmt = FS_FAT12; 05818 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */ 05819 } 05820 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */ 05821 sz_rsv = 1; /* Number of reserved sectors */ 05822 sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */ 05823 } 05824 b_fat = b_vol + sz_rsv; /* FAT base */ 05825 b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */ 05826 05827 /* Align data base to erase block boundary (for flash memory media) */ 05828 n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */ 05829 if (fmt == FS_FAT32) { /* FAT32: Move FAT base */ 05830 sz_rsv += n; b_fat += n; 05831 } else { /* FAT: Expand FAT size */ 05832 sz_fat += n / n_fats; 05833 } 05834 05835 /* Determine number of clusters and final check of validity of the FAT sub-type */ 05836 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume */ 05837 n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau; 05838 if (fmt == FS_FAT32) { 05839 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */ 05840 if (au == 0 && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */ 05841 LEAVE_MKFS(FR_MKFS_ABORTED); 05842 } 05843 } 05844 if (fmt == FS_FAT16) { 05845 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */ 05846 if (au == 0 && (pau * 2) <= 64) { 05847 au = pau * 2; continue; /* Adjust cluster size and retry */ 05848 } 05849 if ((opt & FM_FAT32)) { 05850 fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */ 05851 } 05852 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 05853 LEAVE_MKFS(FR_MKFS_ABORTED); 05854 } 05855 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */ 05856 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */ 05857 LEAVE_MKFS(FR_MKFS_ABORTED); 05858 } 05859 } 05860 if (fmt == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */ 05861 05862 /* Ok, it is the valid cluster configuration */ 05863 break; 05864 } while (1); 05865 05866 #if FF_USE_TRIM 05867 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */ 05868 disk_ioctl(pdrv, CTRL_TRIM, tbl); 05869 #endif 05870 /* Create FAT VBR */ 05871 mem_set(buf, 0, ss); 05872 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */ 05873 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */ 05874 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */ 05875 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */ 05876 buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */ 05877 st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */ 05878 if (sz_vol < 0x10000) { 05879 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */ 05880 } else { 05881 st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */ 05882 } 05883 buf[BPB_Media] = 0xF8; /* Media descriptor byte */ 05884 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */ 05885 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */ 05886 st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */ 05887 if (fmt == FS_FAT32) { 05888 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */ 05889 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */ 05890 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */ 05891 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */ 05892 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */ 05893 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */ 05894 buf[BS_BootSig32] = 0x29; /* Extended boot signature */ 05895 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */ 05896 } else { 05897 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */ 05898 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */ 05899 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */ 05900 buf[BS_BootSig] = 0x29; /* Extended boot signature */ 05901 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */ 05902 } 05903 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */ 05904 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */ 05905 05906 /* Create FSINFO record if needed */ 05907 if (fmt == FS_FAT32) { 05908 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */ 05909 mem_set(buf, 0, ss); 05910 st_dword(buf + FSI_LeadSig, 0x41615252); 05911 st_dword(buf + FSI_StrucSig, 0x61417272); 05912 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */ 05913 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */ 05914 st_word(buf + BS_55AA, 0xAA55); 05915 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */ 05916 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */ 05917 } 05918 05919 /* Initialize FAT area */ 05920 mem_set(buf, 0, (UINT)szb_buf); 05921 sect = b_fat; /* FAT start sector */ 05922 for (i = 0; i < n_fats; i++) { /* Initialize FATs each */ 05923 if (fmt == FS_FAT32) { 05924 st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */ 05925 st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */ 05926 st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */ 05927 } else { 05928 st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */ 05929 } 05930 nsect = sz_fat; /* Number of FAT sectors */ 05931 do { /* Fill FAT sectors */ 05932 n = (nsect > sz_buf) ? sz_buf : nsect; 05933 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05934 mem_set(buf, 0, ss); 05935 sect += n; nsect -= n; 05936 } while (nsect); 05937 } 05938 05939 /* Initialize root directory (fill with zero) */ 05940 nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */ 05941 do { 05942 n = (nsect > sz_buf) ? sz_buf : nsect; 05943 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05944 sect += n; nsect -= n; 05945 } while (nsect); 05946 } 05947 05948 /* Determine system ID in the partition table */ 05949 if (FF_FS_EXFAT && fmt == FS_EXFAT) { 05950 sys = 0x07; /* HPFS/NTFS/exFAT */ 05951 } else { 05952 if (fmt == FS_FAT32) { 05953 sys = 0x0C; /* FAT32X */ 05954 } else { 05955 if (sz_vol >= 0x10000) { 05956 sys = 0x06; /* FAT12/16 (large) */ 05957 } else { 05958 sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */ 05959 } 05960 } 05961 } 05962 05963 /* Update partition information */ 05964 if (FF_MULTI_PARTITION && part != 0) { /* Created in the existing partition */ 05965 /* Update system ID in the partition table */ 05966 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */ 05967 buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */ 05968 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */ 05969 } else { /* Created as a new single partition */ 05970 if (!(opt & FM_SFD)) { /* Create partition table if in FDISK format */ 05971 mem_set(buf, 0, ss); 05972 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */ 05973 pte = buf + MBR_Table; /* Create partition table for single partition in the drive */ 05974 pte[PTE_Boot] = 0; /* Boot indicator */ 05975 pte[PTE_StHead] = 1; /* Start head */ 05976 pte[PTE_StSec] = 1; /* Start sector */ 05977 pte[PTE_StCyl] = 0; /* Start cylinder */ 05978 pte[PTE_System] = sys; /* System type */ 05979 n = (b_vol + sz_vol) / (63 * 255); /* (End CHS may be invalid) */ 05980 pte[PTE_EdHead] = 254; /* End head */ 05981 pte[PTE_EdSec] = (BYTE)(((n >> 2) & 0xC0) | 63); /* End sector */ 05982 pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */ 05983 st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */ 05984 st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */ 05985 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the MBR */ 05986 } 05987 } 05988 05989 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); 05990 05991 LEAVE_MKFS(FR_OK); 05992 } 05993 05994 05995 05996 #if FF_MULTI_PARTITION 05997 /*-----------------------------------------------------------------------*/ 05998 /* Create Partition Table on the Physical Drive */ 05999 /*-----------------------------------------------------------------------*/ 06000 06001 FRESULT f_fdisk ( 06002 BYTE pdrv, /* Physical drive number */ 06003 const DWORD* szt, /* Pointer to the size table for each partitions */ 06004 void* work /* Pointer to the working buffer (null: use heap memory) */ 06005 ) 06006 { 06007 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl; 06008 BYTE s_hd, e_hd, *p, *buf; = (BYTE*)work; 06009 DSTATUS stat; 06010 DWORD sz_disk, sz_part, s_part; 06011 FRESULT res; 06012 06013 06014 stat = disk_initialize(pdrv); 06015 if (stat & STA_NOINIT) return FR_NOT_READY; 06016 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED; 06017 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR; 06018 06019 buf = (BYTE*)work; 06020 #if FF_USE_LFN == 3 06021 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */ 06022 #endif 06023 if (!buf) return FR_NOT_ENOUGH_CORE; 06024 06025 /* Determine the CHS without any consideration of the drive geometry */ 06026 for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ; 06027 if (n == 256) n--; 06028 e_hd = n - 1; 06029 sz_cyl = 63 * n; 06030 tot_cyl = sz_disk / sz_cyl; 06031 06032 /* Create partition table */ 06033 mem_set(buf, 0, FF_MAX_SS); 06034 p = buf + MBR_Table; b_cyl = 0; 06035 for (i = 0; i < 4; i++, p += SZ_PTE) { 06036 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; /* Number of cylinders */ 06037 if (p_cyl == 0) continue; 06038 s_part = (DWORD)sz_cyl * b_cyl; 06039 sz_part = (DWORD)sz_cyl * p_cyl; 06040 if (i == 0) { /* Exclude first track of cylinder 0 */ 06041 s_hd = 1; 06042 s_part += 63; sz_part -= 63; 06043 } else { 06044 s_hd = 0; 06045 } 06046 e_cyl = b_cyl + p_cyl - 1; /* End cylinder */ 06047 if (e_cyl >= tot_cyl) LEAVE_MKFS(FR_INVALID_PARAMETER); 06048 06049 /* Set partition table */ 06050 p[1] = s_hd; /* Start head */ 06051 p[2] = (BYTE)(((b_cyl >> 2) & 0xC0) | 1); /* Start sector */ 06052 p[3] = (BYTE)b_cyl; /* Start cylinder */ 06053 p[4] = 0x07; /* System type (temporary setting) */ 06054 p[5] = e_hd; /* End head */ 06055 p[6] = (BYTE)(((e_cyl >> 2) & 0xC0) | 63); /* End sector */ 06056 p[7] = (BYTE)e_cyl; /* End cylinder */ 06057 st_dword(p + 8, s_part); /* Start sector in LBA */ 06058 st_dword(p + 12, sz_part); /* Number of sectors */ 06059 06060 /* Next partition */ 06061 b_cyl += p_cyl; 06062 } 06063 st_word(p, 0xAA55); /* MBR signature (always at offset 510) */ 06064 06065 /* Write it to the MBR */ 06066 res = (disk_write(pdrv, buf, 0, 1) == RES_OK && disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR; 06067 LEAVE_MKFS(res); 06068 } 06069 06070 #endif /* FF_MULTI_PARTITION */ 06071 #endif /* FF_USE_MKFS && !FF_FS_READONLY */ 06072 06073 06074 06075 06076 #if FF_USE_STRFUNC 06077 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3) 06078 #error Wrong FF_STRF_ENCODE setting 06079 #endif 06080 /*-----------------------------------------------------------------------*/ 06081 /* Get a String from the File */ 06082 /*-----------------------------------------------------------------------*/ 06083 06084 TCHAR* f_gets ( 06085 TCHAR* buff, /* Pointer to the string buffer to read */ 06086 int len, /* Size of string buffer (items) */ 06087 FIL* fp /* Pointer to the file object */ 06088 ) 06089 { 06090 int nc = 0; 06091 TCHAR *p = buff; 06092 BYTE s[2]; 06093 UINT rc; 06094 WCHAR wc; 06095 #if FF_USE_LFN && ((FF_LFN_UNICODE == 1 && FF_STRF_ENCODE == 3) || (FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3)) 06096 DWORD dc; 06097 #endif 06098 #if FF_USE_LFN && FF_LFN_UNICODE == 1 && FF_STRF_ENCODE == 3 06099 UINT ct; 06100 #endif 06101 06102 #if FF_USE_LFN && FF_LFN_UNICODE == 1 /* UTF-16 output */ 06103 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */ 06104 while (nc < len - 1) { 06105 f_read(fp, s, 1, &rc); 06106 if (rc != 1) break; 06107 wc = s[0]; 06108 if (dbc_1st((BYTE)wc)) { 06109 f_read(fp, s, 1, &rc); 06110 if (rc != 1 || !dbc_2nd(s[0])) continue; 06111 wc = wc << 8 | s[0]; 06112 } 06113 wc = ff_oem2uni(wc, CODEPAGE); 06114 if (wc == 0) continue; 06115 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */ 06116 while (nc < len - 1) { 06117 f_read(fp, s, 2, &rc); 06118 if (rc != 2) break; 06119 wc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06120 #elif FF_STRF_ENCODE == 3 /* Read a character in UTF-8 */ 06121 while (nc < len - 2) { 06122 f_read(fp, s, 1, &rc); 06123 if (rc != 1) break; 06124 dc = s[0]; 06125 if (dc >= 0x80) { 06126 ct = 0; 06127 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } 06128 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } 06129 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } 06130 if (ct == 0) continue; 06131 do { 06132 f_read(fp, s, 1, &rc); 06133 if (rc != 1 || (s[0] & 0xC0) != 0x80) break; 06134 dc = dc << 6 | (s[0] & 0x3F); 06135 } while (--ct); 06136 if (ct || dc < 0x80 || dc >= 0x110000) continue; 06137 } 06138 if (dc >= 0x10000) { 06139 wc = (WCHAR)(0xD800 | ((dc >> 10) - 0x40)); 06140 *p++ = wc; nc++; 06141 wc = (WCHAR)(0xDC00 | (dc & 0x3FF)); 06142 } else { 06143 wc = (WCHAR)dc; 06144 } 06145 #endif 06146 /* Output it in UTF-16 encoding */ 06147 if (FF_USE_STRFUNC == 2 && wc == '\r') continue; 06148 *p++ = wc; nc++; 06149 if (wc == '\n') break; 06150 } 06151 06152 #elif FF_USE_LFN && FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3 /* UTF-8 output */ 06153 while (nc < len - 4) { 06154 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */ 06155 f_read(fp, s, 1, &rc); 06156 if (rc != 1) break; 06157 wc = s[0]; 06158 if (dbc_1st((BYTE)wc)) { 06159 f_read(fp, s, 1, &rc); 06160 if (rc != 1 || !dbc_2nd(s[0])) continue; 06161 wc = wc << 8 | s[0]; 06162 } 06163 dc = ff_oem2uni(wc, CODEPAGE); 06164 if (dc == 0) continue; 06165 #else /* Read a character in UTF-16LE/BE */ 06166 f_read(fp, s, 2, &rc); 06167 if (rc != 2) break; 06168 dc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06169 if (IsSurrogate(dc)) { 06170 f_read(fp, s, 2, &rc); 06171 if (rc != 2) break; 06172 wc = (FF_STRF_ENCODE == 1) ? s[1] << 8 | s[0] : s[0] << 8 | s[1]; 06173 if (!IsSurrogateH(dc) || !IsSurrogateL(wc)) continue; 06174 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); 06175 } 06176 #endif 06177 /* Output it in UTF-8 encoding */ 06178 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; 06179 if (dc < 0x80) { /* 1-byte */ 06180 *p++ = (TCHAR)dc; 06181 nc++; 06182 if (dc == '\n') break; 06183 } else { 06184 if (dc < 0x800) { /* 2-byte */ 06185 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F)); 06186 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06187 nc += 2; 06188 } else { 06189 if (dc < 0x10000) { /* 3-byte */ 06190 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F)); 06191 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 06192 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06193 nc += 3; 06194 } else { /* 4-byte */ 06195 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07)); 06196 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F)); 06197 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F)); 06198 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F)); 06199 nc += 4; 06200 } 06201 } 06202 } 06203 } 06204 06205 #else /* Byte-by-byte without any conversion (ANSI/OEM API or UTF-8 to UTF-8) */ 06206 while (nc < len - 1) { 06207 f_read(fp, s, 1, &rc); 06208 if (rc != 1) break; 06209 wc = s[0]; 06210 if (FF_USE_STRFUNC == 2 && wc == '\r') continue; 06211 *p++ = (TCHAR)wc; nc++; 06212 if (wc == '\n') break; 06213 } 06214 #endif 06215 06216 *p = 0; 06217 return nc ? buff : 0; /* When no data read (EOF or error), return with error. */ 06218 } 06219 06220 06221 06222 06223 #if !FF_FS_READONLY 06224 #include <stdarg.h> 06225 /*-----------------------------------------------------------------------*/ 06226 /* Put a Character to the File */ 06227 /*-----------------------------------------------------------------------*/ 06228 06229 typedef struct { /* Putchar output buffer and work area */ 06230 FIL *fp; /* Ptr to the writing file */ 06231 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */ 06232 #if FF_USE_LFN && FF_LFN_UNICODE == 1 06233 WCHAR hs; 06234 #elif FF_USE_LFN && FF_LFN_UNICODE == 2 06235 BYTE bs[4]; 06236 UINT wi, ct; 06237 #endif 06238 BYTE buf[64]; /* Write buffer */ 06239 } putbuff; 06240 06241 06242 static 06243 void putc_bfd ( /* Buffered write with code conversion */ 06244 putbuff* pb, 06245 TCHAR c 06246 ) 06247 { 06248 UINT n; 06249 int i, nc; 06250 #if FF_USE_LFN && (FF_LFN_UNICODE == 1 || (FF_LFN_UNICODE == 2 && (FF_STRF_ENCODE != 3))) 06251 WCHAR hs, wc; 06252 #endif 06253 #if FF_USE_LFN && FF_LFN_UNICODE == 2 && FF_STRF_ENCODE != 3 06254 DWORD dc; 06255 TCHAR *tp; 06256 #endif 06257 06258 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */ 06259 putc_bfd(pb, '\r'); 06260 } 06261 06262 i = pb->idx; /* Write index of pb->buf[] */ 06263 if (i < 0) return; 06264 nc = pb->nchr; /* Write unit count */ 06265 06266 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 06267 #if FF_USE_LFN && FF_LFN_UNICODE == 1 /* UTF-16 input */ 06268 if (IsSurrogateH(c)) { 06269 pb->hs = c; return; 06270 } 06271 wc = c; hs = pb->hs; pb->hs = 0; 06272 if (hs != 0) { 06273 if (!IsSurrogateL(wc)) hs = 0; 06274 } else { 06275 if (IsSurrogateL(wc)) return; 06276 } 06277 #if FF_STRF_ENCODE == 3 /* Write it in UTF-8 */ 06278 if (hs != 0) { /* 4-byte */ 06279 nc += 4; 06280 hs = (hs & 0x3FF) + 0x40; 06281 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8); 06282 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F)); 06283 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F)); 06284 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 06285 } else { 06286 if (wc < 0x80) { /* 1-byte */ 06287 nc++; 06288 pb->buf[i++] = (BYTE)wc; 06289 } else { 06290 if (wc < 0x800) { /* 2-byte */ 06291 nc += 2; 06292 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6); 06293 } else { /* 3-byte */ 06294 nc += 3; 06295 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12); 06296 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F)); 06297 } 06298 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F)); 06299 } 06300 } 06301 #endif 06302 #else /* UTF-8 input */ 06303 for (;;) { 06304 if (pb->ct == 0) { /* Out of multi-byte sequence? */ 06305 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */ 06306 if ((BYTE)c < 0x80) break; /* 1-byte? */ 06307 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte? */ 06308 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte? */ 06309 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte? */ 06310 return; 06311 } else { /* In the multi-byte sequence */ 06312 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */ 06313 pb->ct = 0; continue; 06314 } 06315 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */ 06316 if (--pb->ct == 0) break; /* End of sequence? */ 06317 return; 06318 } 06319 } 06320 #if FF_STRF_ENCODE == 3 /* Write it in UTF-8 */ 06321 pb->buf[i++] = pb->bs[0]; nc++; 06322 if (pb->bs[0] >= 0xC0) { 06323 pb->buf[i++] = pb->bs[1]; nc++; 06324 } 06325 if (pb->bs[0] >= 0xE0) { 06326 pb->buf[i++] = pb->bs[2]; nc++; 06327 } 06328 if (pb->bs[0] >= 0xF0) { 06329 pb->buf[i++] = pb->bs[3]; nc++; 06330 } 06331 #else /* Write it in UTF-16 or ANSI/OEM */ 06332 tp = (TCHAR*)pb->bs; 06333 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */ 06334 if (dc == 0xFFFFFFFF) return; 06335 wc = (WCHAR)dc; 06336 hs = (WCHAR)(dc >> 16); 06337 #endif 06338 #endif 06339 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 && FF_STRF_ENCODE != 3 06340 #if FF_STRF_ENCODE == 2 /* Write a character in UTF-16BE */ 06341 if (hs != 0) { 06342 pb->buf[i++] = (BYTE)(hs >> 8); 06343 pb->buf[i++] = (BYTE)hs; 06344 nc++; 06345 } 06346 pb->buf[i++] = (BYTE)(wc >> 8); 06347 pb->buf[i++] = (BYTE)wc; 06348 nc++; 06349 #elif FF_STRF_ENCODE == 1 /* Write a character in UTF-16LE */ 06350 if (hs != 0) { 06351 pb->buf[i++] = (BYTE)hs; 06352 pb->buf[i++] = (BYTE)(hs >> 8); 06353 nc++; 06354 } 06355 pb->buf[i++] = (BYTE)wc; 06356 pb->buf[i++] = (BYTE)(wc >> 8); 06357 nc++; 06358 #else /* Write a character in ANSI/OEM */ 06359 if (hs != 0) return; 06360 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */ 06361 if (wc == 0) return;; 06362 if (wc >= 0x100) { 06363 pb->buf[i++] = (BYTE)(wc >> 8); nc++; 06364 } 06365 pb->buf[i++] = (BYTE)wc; nc++; 06366 #endif 06367 #endif 06368 06369 #else /* ANSI/OEM input */ 06370 pb->buf[i++] = (BYTE)c; 06371 nc++; 06372 #endif 06373 06374 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */ 06375 f_write(pb->fp, pb->buf, (UINT)i, &n); 06376 i = (n == (UINT)i) ? 0 : -1; 06377 } 06378 pb->idx = i; 06379 pb->nchr = nc; 06380 } 06381 06382 06383 static 06384 int putc_flush ( /* Flush left characters in the buffer */ 06385 putbuff* pb 06386 ) 06387 { 06388 UINT nw; 06389 06390 if ( pb->idx >= 0 /* Flush buffered characters to the file */ 06391 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK 06392 && (UINT)pb->idx == nw) return pb->nchr; 06393 return EOF; 06394 } 06395 06396 06397 static 06398 void putc_init ( /* Initialize write buffer */ 06399 putbuff* pb, 06400 FIL* fp 06401 ) 06402 { 06403 mem_set(pb, 0, sizeof (putbuff)); 06404 pb->fp = fp; 06405 } 06406 06407 06408 06409 int f_putc ( 06410 TCHAR c, /* A character to be output */ 06411 FIL* fp /* Pointer to the file object */ 06412 ) 06413 { 06414 putbuff pb; 06415 06416 06417 putc_init(&pb, fp); 06418 putc_bfd(&pb, c); /* Put the character */ 06419 return putc_flush(&pb); 06420 } 06421 06422 06423 06424 06425 /*-----------------------------------------------------------------------*/ 06426 /* Put a String to the File */ 06427 /*-----------------------------------------------------------------------*/ 06428 06429 int f_puts ( 06430 const TCHAR* str, /* Pointer to the string to be output */ 06431 FIL* fp /* Pointer to the file object */ 06432 ) 06433 { 06434 putbuff pb; 06435 06436 06437 putc_init(&pb, fp); 06438 while (*str) putc_bfd(&pb, *str++); /* Put the string */ 06439 return putc_flush(&pb); 06440 } 06441 06442 06443 06444 06445 /*-----------------------------------------------------------------------*/ 06446 /* Put a Formatted String to the File */ 06447 /*-----------------------------------------------------------------------*/ 06448 06449 int f_printf ( 06450 FIL* fp, /* Pointer to the file object */ 06451 const TCHAR* fmt, /* Pointer to the format string */ 06452 ... /* Optional arguments... */ 06453 ) 06454 { 06455 va_list arp; 06456 putbuff pb; 06457 BYTE f, r; 06458 UINT i, j, w; 06459 DWORD v; 06460 TCHAR c, d, str[32], *p; 06461 06462 06463 putc_init(&pb, fp); 06464 06465 va_start(arp, fmt); 06466 06467 for (;;) { 06468 c = *fmt++; 06469 if (c == 0) break; /* End of string */ 06470 if (c != '%') { /* Non escape character */ 06471 putc_bfd(&pb, c); 06472 continue; 06473 } 06474 w = f = 0; 06475 c = *fmt++; 06476 if (c == '0') { /* Flag: '0' padding */ 06477 f = 1; c = *fmt++; 06478 } else { 06479 if (c == '-') { /* Flag: left justified */ 06480 f = 2; c = *fmt++; 06481 } 06482 } 06483 if (c == '*') { /* Minimum width by argument */ 06484 w = va_arg(arp, int); 06485 c = *fmt++; 06486 } else { 06487 while (IsDigit(c)) { /* Minimum width */ 06488 w = w * 10 + c - '0'; 06489 c = *fmt++; 06490 } 06491 } 06492 if (c == 'l' || c == 'L') { /* Type prefix: Size is long int */ 06493 f |= 4; c = *fmt++; 06494 } 06495 if (c == 0) break; 06496 d = c; 06497 if (IsLower(d)) d -= 0x20; 06498 switch (d) { /* Atgument type is... */ 06499 case 'S' : /* String */ 06500 p = va_arg(arp, TCHAR*); 06501 for (j = 0; p[j]; j++) ; 06502 if (!(f & 2)) { /* Right padded */ 06503 while (j++ < w) putc_bfd(&pb, ' ') ; 06504 } 06505 while (*p) putc_bfd(&pb, *p++) ; /* String body */ 06506 while (j++ < w) putc_bfd(&pb, ' ') ; /* Left padded */ 06507 continue; 06508 06509 case 'C' : /* Character */ 06510 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue; 06511 06512 case 'B' : /* Unsigned binary */ 06513 r = 2; break; 06514 06515 case 'O' : /* Unsigned octal */ 06516 r = 8; break; 06517 06518 case 'D' : /* Signed decimal */ 06519 case 'U' : /* Unsigned decimal */ 06520 r = 10; break; 06521 06522 case 'X' : /* Unsigned hexdecimal */ 06523 r = 16; break; 06524 06525 default: /* Unknown type (pass-through) */ 06526 putc_bfd(&pb, c); continue; 06527 } 06528 06529 /* Get an argument and put it in numeral */ 06530 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int)); 06531 if (d == 'D' && (v & 0x80000000)) { 06532 v = 0 - v; 06533 f |= 8; 06534 } 06535 i = 0; 06536 do { 06537 d = (TCHAR)(v % r); v /= r; 06538 if (d > 9) d += (c == 'x') ? 0x27 : 0x07; 06539 str[i++] = d + '0'; 06540 } while (v && i < sizeof str / sizeof *str); 06541 if (f & 8) str[i++] = '-'; 06542 j = i; d = (f & 1) ? '0' : ' '; 06543 if (!(f & 2)) { 06544 while (j++ < w) putc_bfd(&pb, d); /* Right pad */ 06545 } 06546 do { 06547 putc_bfd(&pb, str[--i]); /* Number body */ 06548 } while (i); 06549 while (j++ < w) putc_bfd(&pb, d); /* Left pad */ 06550 } 06551 06552 va_end(arp); 06553 06554 return putc_flush(&pb); 06555 } 06556 06557 #endif /* !FF_FS_READONLY */ 06558 #endif /* FF_USE_STRFUNC */ 06559 06560 06561 06562 #if FF_CODE_PAGE == 0 06563 /*-----------------------------------------------------------------------*/ 06564 /* Set Active Codepage for the Path Name */ 06565 /*-----------------------------------------------------------------------*/ 06566 06567 FRESULT f_setcp ( 06568 WORD cp /* Value to be set as active code page */ 06569 ) 06570 { 06571 static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 0}; 06572 static const BYTE *const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, 0}; 06573 UINT i; 06574 06575 06576 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */ 06577 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */ 06578 06579 CodePage = cp; 06580 if (cp >= 900) { /* DBCS */ 06581 ExCvt = 0; 06582 DbcTbl = tables[i]; 06583 } else { /* SBCS */ 06584 ExCvt = tables[i]; 06585 DbcTbl = 0; 06586 } 06587 return FR_OK; 06588 } 06589 #endif /* FF_CODE_PAGE == 0 */ 06590
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