1 /*----------------------------------------------------------------------------/
2 / FatFs - Generic FAT Filesystem Module R0.13c /
3 /-----------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2018, ChaN, all right reserved.
6 /
7 / FatFs module is an open source software. Redistribution and use of FatFs in
8 / source and binary forms, with or without modification, are permitted provided
9 / that the following condition is met:
10 /
11 / 1. Redistributions of source code must retain the above copyright notice,
12 / this condition and the following disclaimer.
13 /
14 / This software is provided by the copyright holder and contributors "AS IS"
15 / and any warranties related to this software are DISCLAIMED.
16 / The copyright owner or contributors be NOT LIABLE for any damages caused
17 / by use of this software.
18 /
19 /----------------------------------------------------------------------------*/
20
21
22 #include "ff.h" /* Declarations of FatFs API */
23 #include "diskio.h" /* Declarations of device I/O functions */
24
25
26 /*--------------------------------------------------------------------------
27
28 Module Private Definitions
29
30 ---------------------------------------------------------------------------*/
31
32 #if FF_DEFINED != 86604 /* Revision ID */
33 #error Wrong include file (ff.h).
34 #endif
35
36
37 /* Limits and boundaries */
38 #define MAX_DIR 0x200000 /* Max size of FAT directory */
39 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */
40 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */
41 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */
42 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */
43 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */
44
45
46 /* Character code support macros */
47 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z')
48 #define IsLower(c) ((c) >= 'a' && (c) <= 'z')
49 #define IsDigit(c) ((c) >= '0' && (c) <= '9')
50 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF)
51 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF)
52 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF)
53
54
55 /* Additional file access control and file status flags for internal use */
56 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
57 #define FA_MODIFIED 0x40 /* File has been modified */
58 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
59
60
61 /* Additional file attribute bits for internal use */
62 #define AM_VOL 0x08 /* Volume label */
63 #define AM_LFN 0x0F /* LFN entry */
64 #define AM_MASK 0x3F /* Mask of defined bits */
65
66
67 /* Name status flags in fn[11] */
68 #define NSFLAG 11 /* Index of the name status byte */
69 #define NS_LOSS 0x01 /* Out of 8.3 format */
70 #define NS_LFN 0x02 /* Force to create LFN entry */
71 #define NS_LAST 0x04 /* Last segment */
72 #define NS_BODY 0x08 /* Lower case flag (body) */
73 #define NS_EXT 0x10 /* Lower case flag (ext) */
74 #define NS_DOT 0x20 /* Dot entry */
75 #define NS_NOLFN 0x40 /* Do not find LFN */
76 #define NS_NONAME 0x80 /* Not followed */
77
78
79 /* exFAT directory entry types */
80 #define ET_BITMAP 0x81 /* Allocation bitmap */
81 #define ET_UPCASE 0x82 /* Up-case table */
82 #define ET_VLABEL 0x83 /* Volume label */
83 #define ET_FILEDIR 0x85 /* File and directory */
84 #define ET_STREAM 0xC0 /* Stream extension */
85 #define ET_FILENAME 0xC1 /* Name extension */
86
87
88 /* FatFs refers the FAT structure as simple byte array instead of structure member
89 / because the C structure is not binary compatible between different platforms */
90
91 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
92 #define BS_OEMName 3 /* OEM name (8-byte) */
93 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
94 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
95 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
96 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */
97 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */
98 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
99 #define BPB_Media 21 /* Media descriptor byte (BYTE) */
100 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
101 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */
102 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
103 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
104 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
105 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
106 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */
107 #define BS_BootSig 38 /* Extended boot signature (BYTE) */
108 #define BS_VolID 39 /* Volume serial number (DWORD) */
109 #define BS_VolLab 43 /* Volume label string (8-byte) */
110 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */
111 #define BS_BootCode 62 /* Boot code (448-byte) */
112 #define BS_55AA 510 /* Signature word (WORD) */
113
114 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
115 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
116 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */
117 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
118 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
119 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
120 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
121 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
122 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
123 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
124 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
125 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
126 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
127
128 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
129 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
130 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
131 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
132 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
133 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
134 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
135 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */
136 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
137 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */
138 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD) */
139 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */
140 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */
141 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
142 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
143 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
144 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
145 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
146
147 #define DIR_Name 0 /* Short file name (11-byte) */
148 #define DIR_Attr 11 /* Attribute (BYTE) */
149 #define DIR_NTres 12 /* Lower case flag (BYTE) */
150 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
151 #define DIR_CrtTime 14 /* Created time (DWORD) */
152 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */
153 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
154 #define DIR_ModTime 22 /* Modified time (DWORD) */
155 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
156 #define DIR_FileSize 28 /* File size (DWORD) */
157 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */
158 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */
159 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */
160 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */
161 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */
162 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */
163 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */
164 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */
165 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */
166 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */
167 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */
168 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */
169 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */
170 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */
171 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */
172 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */
173 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */
174 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */
175 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */
176 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */
177 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */
178 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */
179 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */
180 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */
181 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */
182 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */
183
184 #define SZDIRE 32 /* Size of a directory entry */
185 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
186 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
187 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
188
189 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
190 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
191 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
192 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
193
194 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
195 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
196 #define PTE_Boot 0 /* MBR PTE: Boot indicator */
197 #define PTE_StHead 1 /* MBR PTE: Start head */
198 #define PTE_StSec 2 /* MBR PTE: Start sector */
199 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */
200 #define PTE_System 4 /* MBR PTE: System ID */
201 #define PTE_EdHead 5 /* MBR PTE: End head */
202 #define PTE_EdSec 6 /* MBR PTE: End sector */
203 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */
204 #define PTE_StLba 8 /* MBR PTE: Start in LBA */
205 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */
206
207
208 /* Post process on fatal error in the file operations */
209 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
210
211
212 /* Re-entrancy related */
213 #if FF_FS_REENTRANT
214 #if FF_USE_LFN == 1
215 #error Static LFN work area cannot be used at thread-safe configuration
216 #endif
217 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
218 #else
219 #define LEAVE_FF(fs, res) return res
220 #endif
221
222
223 /* Definitions of volume - physical location conversion */
224 #if FF_MULTI_PARTITION
225 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */
226 #define LD2PT(vol) VolToPart[vol].pt /* Get partition index */
227 #else
228 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is bound to the same physical drive number */
229 #define LD2PT(vol) 0 /* Find first valid partition or in SFD */
230 #endif
231
232
233 /* Definitions of sector size */
234 #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)
235 #error Wrong sector size configuration
236 #endif
237 #if FF_MAX_SS == FF_MIN_SS
238 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
239 #else
240 #define SS(fs) ((fs)->ssize) /* Variable sector size */
241 #endif
242
243
244 /* Timestamp */
245 #if FF_FS_NORTC == 1
246 #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
247 #error Invalid FF_FS_NORTC settings
248 #endif
249 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
250 #else
251 #define GET_FATTIME() get_fattime()
252 #endif
253
254
255 /* File lock controls */
256 #if FF_FS_LOCK != 0
257 #if FF_FS_READONLY
258 #error FF_FS_LOCK must be 0 at read-only configuration
259 #endif
260 typedef struct {
261 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
262 DWORD clu; /* Object ID 2, containing directory (0:root) */
263 DWORD ofs; /* Object ID 3, offset in the directory */
264 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
265 } FILESEM;
266 #endif
267
268
269 /* SBCS up-case tables (\x80-\xFF) */
270 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
271 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
272 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
273 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
274 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
275 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
276 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
277 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
278 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
279 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
280 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
281 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
282 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
283 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
284 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
285 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
286 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
287 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
288 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
289 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
290 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
291 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
292 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
293 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
294 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
295 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
296 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
297 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
298 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
299 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
300 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
301 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
302 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
303 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
304 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
305 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
306 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
307 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
308 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
309 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
310 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
311 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
312 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
313 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
314 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
315 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
316 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
317 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
318 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
319 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
320 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
321 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
322 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
323 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
324 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
325 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
326 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
327 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
328 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
329 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
330 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
331 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
332 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
333 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
334 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
335 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
336 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
337 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
338 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
339 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
340 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
341 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
342 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
343 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
344 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
345 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
346 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
347 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
348 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
349 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
350 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
351 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
352 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
353 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
354 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
355 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
356 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
357 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
358 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
359 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
360 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
361 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
362 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
363 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
364 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
365 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
366 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
367 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
368 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
369 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
370 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
371 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
372 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
373 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
374 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
375 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
376 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
377 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
378 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
379 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
380 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
381 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
382 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
383 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
384 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
385 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
386 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
387 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
388 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
389 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
390 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
391 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
392 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
393 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
394 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
395 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
396 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
397 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
398 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
399 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
400 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
401 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
402 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
403 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
404 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
405 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
406
407
408 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */
409 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}
410 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}
411 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}
412 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}
413
414
415 /* Macros for table definitions */
416 #define MERGE_2STR(a, b) a ## b
417 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)
418
419
420
421
422 /*--------------------------------------------------------------------------
423
424 Module Private Work Area
425
426 ---------------------------------------------------------------------------*/
427 /* Remark: Variables defined here without initial value shall be guaranteed
428 / zero/null at start-up. If not, the linker option or start-up routine is
429 / not compliance with C standard. */
430
431 /*--------------------------------*/
432 /* File/Volume controls */
433 /*--------------------------------*/
434
435 #if FF_VOLUMES < 1 || FF_VOLUMES > 10
436 #error Wrong FF_VOLUMES setting
437 #endif
438 static FATFS* FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */
439 static WORD Fsid; /* Filesystem mount ID */
440
441 #if FF_FS_RPATH != 0
442 static BYTE CurrVol; /* Current drive */
443 #endif
444
445 #if FF_FS_LOCK != 0
446 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
447 #endif
448
449 #if FF_STR_VOLUME_ID
450 #ifdef FF_VOLUME_STRS
451 static const char* const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS}; /* Pre-defined volume ID */
452 #endif
453 #endif
454
455
456 /*--------------------------------*/
457 /* LFN/Directory working buffer */
458 /*--------------------------------*/
459
460 #if FF_USE_LFN == 0 /* Non-LFN configuration */
461 #if FF_FS_EXFAT
462 #error LFN must be enabled when enable exFAT
463 #endif
464 #define DEF_NAMBUF
465 #define INIT_NAMBUF(fs)
466 #define FREE_NAMBUF()
467 #define LEAVE_MKFS(res) return res
468
469 #else /* LFN configurations */
470 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
471 #error Wrong setting of FF_MAX_LFN
472 #endif
473 #if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12
474 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF
475 #endif
476 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3
477 #error Wrong setting of FF_LFN_UNICODE
478 #endif
479 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 */
480 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */
481
482 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */
483 #if FF_FS_EXFAT
484 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */
485 #endif
486 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */
487 #define DEF_NAMBUF
488 #define INIT_NAMBUF(fs)
489 #define FREE_NAMBUF()
490 #define LEAVE_MKFS(res) return res
491
492 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
493 #if FF_FS_EXFAT
494 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */
495 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
496 #define FREE_NAMBUF()
497 #else
498 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */
499 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
500 #define FREE_NAMBUF()
501 #endif
502 #define LEAVE_MKFS(res) return res
503
504 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
505 #if FF_FS_EXFAT
506 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */
507 #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); }
508 #define FREE_NAMBUF() ff_memfree(lfn)
509 #else
510 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */
511 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
512 #define FREE_NAMBUF() ff_memfree(lfn)
513 #endif
514 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; }
515 #define MAX_MALLOC 0x8000 /* Must be >=FF_MAX_SS */
516
517 #else
518 #error Wrong setting of FF_USE_LFN
519
520 #endif /* FF_USE_LFN == 1 */
521 #endif /* FF_USE_LFN == 0 */
522
523
524
525 /*--------------------------------*/
526 /* Code conversion tables */
527 /*--------------------------------*/
528
529 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */
530 #define CODEPAGE CodePage
531 static WORD CodePage; /* Current code page */
532 static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */
533
534 static const BYTE Ct437[] = TBL_CT437;
535 static const BYTE Ct720[] = TBL_CT720;
536 static const BYTE Ct737[] = TBL_CT737;
537 static const BYTE Ct771[] = TBL_CT771;
538 static const BYTE Ct775[] = TBL_CT775;
539 static const BYTE Ct850[] = TBL_CT850;
540 static const BYTE Ct852[] = TBL_CT852;
541 static const BYTE Ct855[] = TBL_CT855;
542 static const BYTE Ct857[] = TBL_CT857;
543 static const BYTE Ct860[] = TBL_CT860;
544 static const BYTE Ct861[] = TBL_CT861;
545 static const BYTE Ct862[] = TBL_CT862;
546 static const BYTE Ct863[] = TBL_CT863;
547 static const BYTE Ct864[] = TBL_CT864;
548 static const BYTE Ct865[] = TBL_CT865;
549 static const BYTE Ct866[] = TBL_CT866;
550 static const BYTE Ct869[] = TBL_CT869;
551 static const BYTE Dc932[] = TBL_DC932;
552 static const BYTE Dc936[] = TBL_DC936;
553 static const BYTE Dc949[] = TBL_DC949;
554 static const BYTE Dc950[] = TBL_DC950;
555
556 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */
557 #define CODEPAGE FF_CODE_PAGE
558 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);
559
560 #else /* Static code page configuration (DBCS) */
561 #define CODEPAGE FF_CODE_PAGE
562 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);
563
564 #endif
565
566
567
568
569 /*--------------------------------------------------------------------------
570
571 Module Private Functions
572
573 ---------------------------------------------------------------------------*/
574
575
576 /*-----------------------------------------------------------------------*/
577 /* Load/Store multi-byte word in the FAT structure */
578 /*-----------------------------------------------------------------------*/
579
ld_word(const BYTE * ptr)580 static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
581 {
582 WORD rv;
583
584 rv = ptr[1];
585 rv = rv << 8 | ptr[0];
586 return rv;
587 }
588
ld_dword(const BYTE * ptr)589 static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
590 {
591 DWORD rv;
592
593 rv = ptr[3];
594 rv = rv << 8 | ptr[2];
595 rv = rv << 8 | ptr[1];
596 rv = rv << 8 | ptr[0];
597 return rv;
598 }
599
600 #if FF_FS_EXFAT
ld_qword(const BYTE * ptr)601 static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
602 {
603 QWORD rv;
604
605 rv = ptr[7];
606 rv = rv << 8 | ptr[6];
607 rv = rv << 8 | ptr[5];
608 rv = rv << 8 | ptr[4];
609 rv = rv << 8 | ptr[3];
610 rv = rv << 8 | ptr[2];
611 rv = rv << 8 | ptr[1];
612 rv = rv << 8 | ptr[0];
613 return rv;
614 }
615 #endif
616
617 #if !FF_FS_READONLY
st_word(BYTE * ptr,WORD val)618 static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
619 {
620 *ptr++ = (BYTE)val; val >>= 8;
621 *ptr++ = (BYTE)val;
622 }
623
st_dword(BYTE * ptr,DWORD val)624 static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
625 {
626 *ptr++ = (BYTE)val; val >>= 8;
627 *ptr++ = (BYTE)val; val >>= 8;
628 *ptr++ = (BYTE)val; val >>= 8;
629 *ptr++ = (BYTE)val;
630 }
631
632 #if FF_FS_EXFAT
st_qword(BYTE * ptr,QWORD val)633 static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
634 {
635 *ptr++ = (BYTE)val; val >>= 8;
636 *ptr++ = (BYTE)val; val >>= 8;
637 *ptr++ = (BYTE)val; val >>= 8;
638 *ptr++ = (BYTE)val; val >>= 8;
639 *ptr++ = (BYTE)val; val >>= 8;
640 *ptr++ = (BYTE)val; val >>= 8;
641 *ptr++ = (BYTE)val; val >>= 8;
642 *ptr++ = (BYTE)val;
643 }
644 #endif
645 #endif /* !FF_FS_READONLY */
646
647
648
649 /*-----------------------------------------------------------------------*/
650 /* String functions */
651 /*-----------------------------------------------------------------------*/
652
653 /* Copy memory to memory */
mem_cpy(void * dst,const void * src,UINT cnt)654 static void mem_cpy (void* dst, const void* src, UINT cnt)
655 {
656 BYTE *d = (BYTE*)dst;
657 const BYTE *s = (const BYTE*)src;
658
659 if (cnt != 0) {
660 do {
661 *d++ = *s++;
662 } while (--cnt);
663 }
664 }
665
666
667 /* Fill memory block */
mem_set(void * dst,int val,UINT cnt)668 static void mem_set (void* dst, int val, UINT cnt)
669 {
670 BYTE *d = (BYTE*)dst;
671
672 do {
673 *d++ = (BYTE)val;
674 } while (--cnt);
675 }
676
677
678 /* Compare memory block */
mem_cmp(const void * dst,const void * src,UINT cnt)679 static int mem_cmp (const void* dst, const void* src, UINT cnt) /* ZR:same, NZ:different */
680 {
681 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
682 int r = 0;
683
684 do {
685 r = *d++ - *s++;
686 } while (--cnt && r == 0);
687
688 return r;
689 }
690
691
692 /* Check if chr is contained in the string */
chk_chr(const char * str,int chr)693 static int chk_chr (const char* str, int chr) /* NZ:contained, ZR:not contained */
694 {
695 while (*str && *str != chr) str++;
696 return *str;
697 }
698
699
700 /* Test if the character is DBC 1st byte */
dbc_1st(BYTE c)701 static int dbc_1st (BYTE c)
702 {
703 #if FF_CODE_PAGE == 0 /* Variable code page */
704 if (DbcTbl && c >= DbcTbl[0]) {
705 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */
706 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */
707 }
708 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
709 if (c >= DbcTbl[0]) {
710 if (c <= DbcTbl[1]) return 1;
711 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;
712 }
713 #else /* SBCS fixed code page */
714 if (c != 0) return 0; /* Always false */
715 #endif
716 return 0;
717 }
718
719
720 /* Test if the character is DBC 2nd byte */
dbc_2nd(BYTE c)721 static int dbc_2nd (BYTE c)
722 {
723 #if FF_CODE_PAGE == 0 /* Variable code page */
724 if (DbcTbl && c >= DbcTbl[4]) {
725 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */
726 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */
727 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */
728 }
729 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
730 if (c >= DbcTbl[4]) {
731 if (c <= DbcTbl[5]) return 1;
732 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;
733 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;
734 }
735 #else /* SBCS fixed code page */
736 if (c != 0) return 0; /* Always false */
737 #endif
738 return 0;
739 }
740
741
742 #if FF_USE_LFN
743
744 /* Get a character from TCHAR string in defined API encodeing */
tchar2uni(const TCHAR ** str)745 static DWORD tchar2uni ( /* Returns character in UTF-16 encoding (>=0x10000 on double encoding unit, 0xFFFFFFFF on decode error) */
746 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */
747 )
748 {
749 DWORD uc;
750 const TCHAR *p = *str;
751
752 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
753 WCHAR wc;
754
755 uc = *p++; /* Get a unit */
756 if (IsSurrogate(uc)) { /* Surrogate? */
757 wc = *p++; /* Get low surrogate */
758 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */
759 uc = uc << 16 | wc;
760 }
761
762 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
763 BYTE b;
764 int nf;
765
766 uc = (BYTE)*p++; /* Get a unit */
767 if (uc & 0x80) { /* Multiple byte code? */
768 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */
769 uc &= 0x1F; nf = 1;
770 } else {
771 if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */
772 uc &= 0x0F; nf = 2;
773 } else {
774 if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */
775 uc &= 0x07; nf = 3;
776 } else { /* Wrong sequence */
777 return 0xFFFFFFFF;
778 }
779 }
780 }
781 do { /* Get trailing bytes */
782 b = (BYTE)*p++;
783 if ((b & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */
784 uc = uc << 6 | (b & 0x3F);
785 } while (--nf != 0);
786 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */
787 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
788 }
789
790 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
791 uc = (TCHAR)*p++; /* Get a unit */
792 if (uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */
793 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
794
795 #else /* ANSI/OEM input */
796 BYTE b;
797 WCHAR wc;
798
799 wc = (BYTE)*p++; /* Get a byte */
800 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */
801 b = (BYTE)*p++; /* Get 2nd byte */
802 if (!dbc_2nd(b)) return 0xFFFFFFFF; /* Invalid code? */
803 wc = (wc << 8) + b; /* Make a DBC */
804 }
805 if (wc != 0) {
806 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */
807 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */
808 }
809 uc = wc;
810
811 #endif
812 *str = p; /* Next read pointer */
813 return uc;
814 }
815
816
817 /* Output a TCHAR string in defined API encoding */
put_utf(DWORD chr,TCHAR * buf,UINT szb)818 static BYTE put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */
819 DWORD chr, /* UTF-16 encoded character (Double encoding unit char if >=0x10000) */
820 TCHAR* buf, /* Output buffer */
821 UINT szb /* Size of the buffer */
822 )
823 {
824 #if FF_LFN_UNICODE == 1 /* UTF-16 output */
825 WCHAR hs, wc;
826
827 hs = (WCHAR)(chr >> 16);
828 wc = (WCHAR)chr;
829 if (hs == 0) { /* Single encoding unit? */
830 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */
831 *buf = wc;
832 return 1;
833 }
834 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */
835 *buf++ = hs;
836 *buf++ = wc;
837 return 2;
838
839 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */
840 DWORD hc;
841
842 if (chr < 0x80) { /* Single byte code? */
843 if (szb < 1) return 0; /* Buffer overflow? */
844 *buf = (TCHAR)chr;
845 return 1;
846 }
847 if (chr < 0x800) { /* 2-byte sequence? */
848 if (szb < 2) return 0; /* Buffer overflow? */
849 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F));
850 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
851 return 2;
852 }
853 if (chr < 0x10000) { /* 3-byte sequence? */
854 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */
855 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F));
856 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
857 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
858 return 3;
859 }
860 /* 4-byte sequence */
861 if (szb < 4) return 0; /* Buffer overflow? */
862 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
863 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
864 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
865 chr = (hc | chr) + 0x10000;
866 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07));
867 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F));
868 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
869 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
870 return 4;
871
872 #elif FF_LFN_UNICODE == 3 /* UTF-32 output */
873 DWORD hc;
874
875 if (szb < 1) return 0; /* Buffer overflow? */
876 if (chr >= 0x10000) { /* Out of BMP? */
877 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
878 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
879 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
880 chr = (hc | chr) + 0x10000;
881 }
882 *buf++ = (TCHAR)chr;
883 return 1;
884
885 #else /* ANSI/OEM output */
886 WCHAR wc;
887
888 wc = ff_uni2oem(chr, CODEPAGE);
889 if (wc >= 0x100) { /* Is this a DBC? */
890 if (szb < 2) return 0;
891 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */
892 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */
893 return 2;
894 }
895 if (wc == 0 || szb < 1) return 0; /* Invalid char or buffer overflow? */
896 *buf++ = (TCHAR)wc; /* Store the character */
897 return 1;
898 #endif
899 }
900 #endif /* FF_USE_LFN */
901
902
903 #if FF_FS_REENTRANT
904 /*-----------------------------------------------------------------------*/
905 /* Request/Release grant to access the volume */
906 /*-----------------------------------------------------------------------*/
lock_fs(FATFS * fs)907 static int lock_fs ( /* 1:Ok, 0:timeout */
908 FATFS* fs /* Filesystem object */
909 )
910 {
911 return ff_req_grant(fs->sobj);
912 }
913
914
unlock_fs(FATFS * fs,FRESULT res)915 static void unlock_fs (
916 FATFS* fs, /* Filesystem object */
917 FRESULT res /* Result code to be returned */
918 )
919 {
920 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
921 ff_rel_grant(fs->sobj);
922 }
923 }
924
925 #endif
926
927
928
929 #if FF_FS_LOCK != 0
930 /*-----------------------------------------------------------------------*/
931 /* File lock control functions */
932 /*-----------------------------------------------------------------------*/
933
chk_lock(FF_DIR * dp,int acc)934 static FRESULT chk_lock ( /* Check if the file can be accessed */
935 FF_DIR* dp, /* Directory object pointing the file to be checked */
936 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */
937 )
938 {
939 UINT i, be;
940
941 /* Search open object table for the object */
942 be = 0;
943 for (i = 0; i < FF_FS_LOCK; i++) {
944 if (Files[i].fs) { /* Existing entry */
945 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */
946 Files[i].clu == dp->obj.sclust &&
947 Files[i].ofs == dp->dptr) break;
948 } else { /* Blank entry */
949 be = 1;
950 }
951 }
952 if (i == FF_FS_LOCK) { /* The object has not been opened */
953 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */
954 }
955
956 /* The object was opened. Reject any open against writing file and all write mode open */
957 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
958 }
959
960
enq_lock(void)961 static int enq_lock (void) /* Check if an entry is available for a new object */
962 {
963 UINT i;
964
965 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
966 return (i == FF_FS_LOCK) ? 0 : 1;
967 }
968
969
inc_lock(FF_DIR * dp,int acc)970 static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
971 FF_DIR* dp, /* Directory object pointing the file to register or increment */
972 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
973 )
974 {
975 UINT i;
976
977
978 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
979 if (Files[i].fs == dp->obj.fs &&
980 Files[i].clu == dp->obj.sclust &&
981 Files[i].ofs == dp->dptr) break;
982 }
983
984 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
985 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
986 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
987 Files[i].fs = dp->obj.fs;
988 Files[i].clu = dp->obj.sclust;
989 Files[i].ofs = dp->dptr;
990 Files[i].ctr = 0;
991 }
992
993 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */
994
995 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
996
997 return i + 1; /* Index number origin from 1 */
998 }
999
1000
dec_lock(UINT i)1001 static FRESULT dec_lock ( /* Decrement object open counter */
1002 UINT i /* Semaphore index (1..) */
1003 )
1004 {
1005 WORD n;
1006 FRESULT res;
1007
1008
1009 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */
1010 n = Files[i].ctr;
1011 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
1012 if (n > 0) n--; /* Decrement read mode open count */
1013 Files[i].ctr = n;
1014 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */
1015 res = FR_OK;
1016 } else {
1017 res = FR_INT_ERR; /* Invalid index nunber */
1018 }
1019 return res;
1020 }
1021
1022
clear_lock(FATFS * fs)1023 static void clear_lock ( /* Clear lock entries of the volume */
1024 FATFS *fs
1025 )
1026 {
1027 UINT i;
1028
1029 for (i = 0; i < FF_FS_LOCK; i++) {
1030 if (Files[i].fs == fs) Files[i].fs = 0;
1031 }
1032 }
1033
1034 #endif /* FF_FS_LOCK != 0 */
1035
1036
1037
1038 /*-----------------------------------------------------------------------*/
1039 /* Move/Flush disk access window in the filesystem object */
1040 /*-----------------------------------------------------------------------*/
1041 #if !FF_FS_READONLY
sync_window(FATFS * fs)1042 static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */
1043 FATFS* fs /* Filesystem object */
1044 )
1045 {
1046 FRESULT res = FR_OK;
1047
1048
1049 if (fs->wflag) { /* Is the disk access window dirty */
1050 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write back the window */
1051 fs->wflag = 0; /* Clear window dirty flag */
1052 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */
1053 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */
1054 }
1055 } else {
1056 res = FR_DISK_ERR;
1057 }
1058 }
1059 return res;
1060 }
1061 #endif
1062
1063
move_window(FATFS * fs,DWORD sector)1064 static FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */
1065 FATFS* fs, /* Filesystem object */
1066 DWORD sector /* Sector number to make appearance in the fs->win[] */
1067 )
1068 {
1069 FRESULT res = FR_OK;
1070
1071
1072 if (sector != fs->winsect) { /* Window offset changed? */
1073 #if !FF_FS_READONLY
1074 res = sync_window(fs); /* Write-back changes */
1075 #endif
1076 if (res == FR_OK) { /* Fill sector window with new data */
1077 if (disk_read(fs->pdrv, fs->win, sector, 1) != RES_OK) {
1078 sector = 0xFFFFFFFF; /* Invalidate window if read data is not valid */
1079 res = FR_DISK_ERR;
1080 }
1081 fs->winsect = sector;
1082 }
1083 }
1084 return res;
1085 }
1086
1087
1088
1089
1090 #if !FF_FS_READONLY
1091 /*-----------------------------------------------------------------------*/
1092 /* Synchronize filesystem and data on the storage */
1093 /*-----------------------------------------------------------------------*/
1094
sync_fs(FATFS * fs)1095 static FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */
1096 FATFS* fs /* Filesystem object */
1097 )
1098 {
1099 FRESULT res;
1100
1101
1102 res = sync_window(fs);
1103 if (res == FR_OK) {
1104 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */
1105 /* Create FSInfo structure */
1106 mem_set(fs->win, 0, sizeof fs->win);
1107 st_word(fs->win + BS_55AA, 0xAA55);
1108 st_dword(fs->win + FSI_LeadSig, 0x41615252);
1109 st_dword(fs->win + FSI_StrucSig, 0x61417272);
1110 st_dword(fs->win + FSI_Free_Count, fs->free_clst);
1111 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
1112 /* Write it into the FSInfo sector */
1113 fs->winsect = fs->volbase + 1;
1114 disk_write(fs->pdrv, fs->win, fs->winsect, 1);
1115 fs->fsi_flag = 0;
1116 }
1117 /* Make sure that no pending write process in the lower layer */
1118 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
1119 }
1120
1121 return res;
1122 }
1123
1124 #endif
1125
1126
1127
1128 /*-----------------------------------------------------------------------*/
1129 /* Get physical sector number from cluster number */
1130 /*-----------------------------------------------------------------------*/
1131
clst2sect(FATFS * fs,DWORD clst)1132 static DWORD clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
1133 FATFS* fs, /* Filesystem object */
1134 DWORD clst /* Cluster# to be converted */
1135 )
1136 {
1137 clst -= 2; /* Cluster number is origin from 2 */
1138 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */
1139 return fs->database + fs->csize * clst; /* Start sector number of the cluster */
1140 }
1141
1142
1143
1144
1145 /*-----------------------------------------------------------------------*/
1146 /* FAT access - Read value of a FAT entry */
1147 /*-----------------------------------------------------------------------*/
1148
get_fat(FFOBJID * obj,DWORD clst)1149 static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
1150 FFOBJID* obj, /* Corresponding object */
1151 DWORD clst /* Cluster number to get the value */
1152 )
1153 {
1154 UINT wc, bc;
1155 DWORD val;
1156 FATFS *fs = obj->fs;
1157
1158
1159 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
1160 val = 1; /* Internal error */
1161
1162 } else {
1163 val = 0xFFFFFFFF; /* Default value falls on disk error */
1164
1165 switch (fs->fs_type) {
1166 case FS_FAT12 :
1167 bc = (UINT)clst; bc += bc / 2;
1168 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1169 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */
1170 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1171 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */
1172 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */
1173 break;
1174
1175 case FS_FAT16 :
1176 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
1177 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */
1178 break;
1179
1180 case FS_FAT32 :
1181 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1182 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */
1183 break;
1184 #if FF_FS_EXFAT
1185 case FS_EXFAT :
1186 if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) { /* Object except root dir must have valid data length */
1187 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
1188 DWORD clen = (DWORD)((obj->objsize - 1) / SS(fs)) / fs->csize; /* Number of clusters - 1 */
1189
1190 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */
1191 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */
1192 break;
1193 }
1194 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */
1195 val = clst + 1; /* Generate the value */
1196 break;
1197 }
1198 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
1199 if (obj->n_frag != 0) { /* Is it on the growing edge? */
1200 val = 0x7FFFFFFF; /* Generate EOC */
1201 } else {
1202 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1203 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
1204 }
1205 break;
1206 }
1207 }
1208 /* go to default */
1209 #endif
1210 default:
1211 val = 1; /* Internal error */
1212 }
1213 }
1214
1215 return val;
1216 }
1217
1218
1219
1220
1221 #if !FF_FS_READONLY
1222 /*-----------------------------------------------------------------------*/
1223 /* FAT access - Change value of a FAT entry */
1224 /*-----------------------------------------------------------------------*/
1225
put_fat(FATFS * fs,DWORD clst,DWORD val)1226 static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
1227 FATFS* fs, /* Corresponding filesystem object */
1228 DWORD clst, /* FAT index number (cluster number) to be changed */
1229 DWORD val /* New value to be set to the entry */
1230 )
1231 {
1232 UINT bc;
1233 BYTE *p;
1234 FRESULT res = FR_INT_ERR;
1235
1236
1237 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
1238 switch (fs->fs_type) {
1239 case FS_FAT12 :
1240 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */
1241 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1242 if (res != FR_OK) break;
1243 p = fs->win + bc++ % SS(fs);
1244 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Put 1st byte */
1245 fs->wflag = 1;
1246 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1247 if (res != FR_OK) break;
1248 p = fs->win + bc % SS(fs);
1249 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Put 2nd byte */
1250 fs->wflag = 1;
1251 break;
1252
1253 case FS_FAT16 :
1254 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
1255 if (res != FR_OK) break;
1256 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */
1257 fs->wflag = 1;
1258 break;
1259
1260 case FS_FAT32 :
1261 #if FF_FS_EXFAT
1262 case FS_EXFAT :
1263 #endif
1264 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1265 if (res != FR_OK) break;
1266 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1267 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
1268 }
1269 st_dword(fs->win + clst * 4 % SS(fs), val);
1270 fs->wflag = 1;
1271 break;
1272 }
1273 }
1274 return res;
1275 }
1276
1277 #endif /* !FF_FS_READONLY */
1278
1279
1280
1281
1282 #if FF_FS_EXFAT && !FF_FS_READONLY
1283 /*-----------------------------------------------------------------------*/
1284 /* exFAT: Accessing FAT and Allocation Bitmap */
1285 /*-----------------------------------------------------------------------*/
1286
1287 /*--------------------------------------*/
1288 /* Find a contiguous free cluster block */
1289 /*--------------------------------------*/
1290
find_bitmap(FATFS * fs,DWORD clst,DWORD ncl)1291 static DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
1292 FATFS* fs, /* Filesystem object */
1293 DWORD clst, /* Cluster number to scan from */
1294 DWORD ncl /* Number of contiguous clusters to find (1..) */
1295 )
1296 {
1297 BYTE bm, bv;
1298 UINT i;
1299 DWORD val, scl, ctr;
1300
1301
1302 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
1303 if (clst >= fs->n_fatent - 2) clst = 0;
1304 scl = val = clst; ctr = 0;
1305 for (;;) {
1306 if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;
1307 i = val / 8 % SS(fs); bm = 1 << (val % 8);
1308 do {
1309 do {
1310 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
1311 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
1312 val = 0; bm = 0; i = SS(fs);
1313 }
1314 if (bv == 0) { /* Is it a free cluster? */
1315 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */
1316 } else {
1317 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */
1318 }
1319 if (val == clst) return 0; /* All cluster scanned? */
1320 } while (bm != 0);
1321 bm = 1;
1322 } while (++i < SS(fs));
1323 }
1324 }
1325
1326
1327 /*----------------------------------------*/
1328 /* Set/Clear a block of allocation bitmap */
1329 /*----------------------------------------*/
1330
change_bitmap(FATFS * fs,DWORD clst,DWORD ncl,int bv)1331 static FRESULT change_bitmap (
1332 FATFS* fs, /* Filesystem object */
1333 DWORD clst, /* Cluster number to change from */
1334 DWORD ncl, /* Number of clusters to be changed */
1335 int bv /* bit value to be set (0 or 1) */
1336 )
1337 {
1338 BYTE bm;
1339 UINT i;
1340 DWORD sect;
1341
1342
1343 clst -= 2; /* The first bit corresponds to cluster #2 */
1344 sect = fs->bitbase + clst / 8 / SS(fs); /* Sector address */
1345 i = clst / 8 % SS(fs); /* Byte offset in the sector */
1346 bm = 1 << (clst % 8); /* Bit mask in the byte */
1347 for (;;) {
1348 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
1349 do {
1350 do {
1351 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
1352 fs->win[i] ^= bm; /* Flip the bit */
1353 fs->wflag = 1;
1354 if (--ncl == 0) return FR_OK; /* All bits processed? */
1355 } while (bm <<= 1); /* Next bit */
1356 bm = 1;
1357 } while (++i < SS(fs)); /* Next byte */
1358 i = 0;
1359 }
1360 }
1361
1362
1363 /*---------------------------------------------*/
1364 /* Fill the first fragment of the FAT chain */
1365 /*---------------------------------------------*/
1366
fill_first_frag(FFOBJID * obj)1367 static FRESULT fill_first_frag (
1368 FFOBJID* obj /* Pointer to the corresponding object */
1369 )
1370 {
1371 FRESULT res;
1372 DWORD cl, n;
1373
1374
1375 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */
1376 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
1377 res = put_fat(obj->fs, cl, cl + 1);
1378 if (res != FR_OK) return res;
1379 }
1380 obj->stat = 0; /* Change status 'FAT chain is valid' */
1381 }
1382 return FR_OK;
1383 }
1384
1385
1386 /*---------------------------------------------*/
1387 /* Fill the last fragment of the FAT chain */
1388 /*---------------------------------------------*/
1389
fill_last_frag(FFOBJID * obj,DWORD lcl,DWORD term)1390 static FRESULT fill_last_frag (
1391 FFOBJID* obj, /* Pointer to the corresponding object */
1392 DWORD lcl, /* Last cluster of the fragment */
1393 DWORD term /* Value to set the last FAT entry */
1394 )
1395 {
1396 FRESULT res;
1397
1398
1399 while (obj->n_frag > 0) { /* Create the chain of last fragment */
1400 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);
1401 if (res != FR_OK) return res;
1402 obj->n_frag--;
1403 }
1404 return FR_OK;
1405 }
1406
1407 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */
1408
1409
1410
1411 #if !FF_FS_READONLY
1412 /*-----------------------------------------------------------------------*/
1413 /* FAT handling - Remove a cluster chain */
1414 /*-----------------------------------------------------------------------*/
1415
remove_chain(FFOBJID * obj,DWORD clst,DWORD pclst)1416 static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1417 FFOBJID* obj, /* Corresponding object */
1418 DWORD clst, /* Cluster to remove a chain from */
1419 DWORD pclst /* Previous cluster of clst (0 if entire chain) */
1420 )
1421 {
1422 FRESULT res = FR_OK;
1423 DWORD nxt;
1424 FATFS *fs = obj->fs;
1425 #if FF_FS_EXFAT || FF_USE_TRIM
1426 DWORD scl = clst, ecl = clst;
1427 #endif
1428 #if FF_USE_TRIM
1429 DWORD rt[2];
1430 #endif
1431
1432 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
1433
1434 /* Mark the previous cluster 'EOC' on the FAT if it exists */
1435 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
1436 res = put_fat(fs, pclst, 0xFFFFFFFF);
1437 if (res != FR_OK) return res;
1438 }
1439
1440 /* Remove the chain */
1441 do {
1442 nxt = get_fat(obj, clst); /* Get cluster status */
1443 if (nxt == 0) break; /* Empty cluster? */
1444 if (nxt == 1) return FR_INT_ERR; /* Internal error? */
1445 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
1446 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1447 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
1448 if (res != FR_OK) return res;
1449 }
1450 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
1451 fs->free_clst++;
1452 fs->fsi_flag |= 1;
1453 }
1454 #if FF_FS_EXFAT || FF_USE_TRIM
1455 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1456 ecl = nxt;
1457 } else { /* End of contiguous cluster block */
1458 #if FF_FS_EXFAT
1459 if (fs->fs_type == FS_EXFAT) {
1460 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
1461 if (res != FR_OK) return res;
1462 }
1463 #endif
1464 #if FF_USE_TRIM
1465 rt[0] = clst2sect(fs, scl); /* Start of data area freed */
1466 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area freed */
1467 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform device the data in the block is no longer needed */
1468 #endif
1469 scl = ecl = nxt;
1470 }
1471 #endif
1472 clst = nxt; /* Next cluster */
1473 } while (clst < fs->n_fatent); /* Repeat while not the last link */
1474
1475 #if FF_FS_EXFAT
1476 /* Some post processes for chain status */
1477 if (fs->fs_type == FS_EXFAT) {
1478 if (pclst == 0) { /* Has the entire chain been removed? */
1479 obj->stat = 0; /* Change the chain status 'initial' */
1480 } else {
1481 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */
1482 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */
1483 while (clst != pclst) {
1484 nxt = get_fat(obj, clst);
1485 if (nxt < 2) return FR_INT_ERR;
1486 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;
1487 if (nxt != clst + 1) break; /* Not contiguous? */
1488 clst++;
1489 }
1490 if (clst == pclst) { /* Has the chain got contiguous again? */
1491 obj->stat = 2; /* Change the chain status 'contiguous' */
1492 }
1493 } else {
1494 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */
1495 obj->stat = 2; /* Change the chain status 'contiguous' */
1496 }
1497 }
1498 }
1499 }
1500 #endif
1501 return FR_OK;
1502 }
1503
1504
1505
1506
1507 /*-----------------------------------------------------------------------*/
1508 /* FAT handling - Stretch a chain or Create a new chain */
1509 /*-----------------------------------------------------------------------*/
1510
create_chain(FFOBJID * obj,DWORD clst)1511 static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1512 FFOBJID* obj, /* Corresponding object */
1513 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1514 )
1515 {
1516 DWORD cs, ncl, scl;
1517 FRESULT res;
1518 FATFS *fs = obj->fs;
1519
1520
1521 if (clst == 0) { /* Create a new chain */
1522 scl = fs->last_clst; /* Suggested cluster to start to find */
1523 if (scl == 0 || scl >= fs->n_fatent) scl = 1;
1524 }
1525 else { /* Stretch a chain */
1526 cs = get_fat(obj, clst); /* Check the cluster status */
1527 if (cs < 2) return 1; /* Test for insanity */
1528 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */
1529 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1530 scl = clst; /* Cluster to start to find */
1531 }
1532 if (fs->free_clst == 0) return 0; /* No free cluster */
1533
1534 #if FF_FS_EXFAT
1535 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
1536 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
1537 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
1538 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
1539 if (res == FR_INT_ERR) return 1;
1540 if (res == FR_DISK_ERR) return 0xFFFFFFFF;
1541 if (clst == 0) { /* Is it a new chain? */
1542 obj->stat = 2; /* Set status 'contiguous' */
1543 } else { /* It is a stretched chain */
1544 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
1545 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
1546 obj->stat = 3; /* Change status 'just fragmented' */
1547 }
1548 }
1549 if (obj->stat != 2) { /* Is the file non-contiguous? */
1550 if (ncl == clst + 1) { /* Is the cluster next to previous one? */
1551 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */
1552 } else { /* New fragment */
1553 if (obj->n_frag == 0) obj->n_frag = 1;
1554 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */
1555 if (res == FR_OK) obj->n_frag = 1;
1556 }
1557 }
1558 } else
1559 #endif
1560 { /* On the FAT/FAT32 volume */
1561 ncl = 0;
1562 if (scl == clst) { /* Stretching an existing chain? */
1563 ncl = scl + 1; /* Test if next cluster is free */
1564 if (ncl >= fs->n_fatent) ncl = 2;
1565 cs = get_fat(obj, ncl); /* Get next cluster status */
1566 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1567 if (cs != 0) { /* Not free? */
1568 cs = fs->last_clst; /* Start at suggested cluster if it is valid */
1569 if (cs >= 2 && cs < fs->n_fatent) scl = cs;
1570 ncl = 0;
1571 }
1572 }
1573 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */
1574 ncl = scl; /* Start cluster */
1575 for (;;) {
1576 ncl++; /* Next cluster */
1577 if (ncl >= fs->n_fatent) { /* Check wrap-around */
1578 ncl = 2;
1579 if (ncl > scl) return 0; /* No free cluster found? */
1580 }
1581 cs = get_fat(obj, ncl); /* Get the cluster status */
1582 if (cs == 0) break; /* Found a free cluster? */
1583 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1584 if (ncl == scl) return 0; /* No free cluster found? */
1585 }
1586 }
1587 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
1588 if (res == FR_OK && clst != 0) {
1589 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
1590 }
1591 }
1592
1593 if (res == FR_OK) { /* Update FSINFO if function succeeded. */
1594 fs->last_clst = ncl;
1595 if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--;
1596 fs->fsi_flag |= 1;
1597 } else {
1598 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */
1599 }
1600
1601 return ncl; /* Return new cluster number or error status */
1602 }
1603
1604 #endif /* !FF_FS_READONLY */
1605
1606
1607
1608
1609 #if FF_USE_FASTSEEK
1610 /*-----------------------------------------------------------------------*/
1611 /* FAT handling - Convert offset into cluster with link map table */
1612 /*-----------------------------------------------------------------------*/
1613
clmt_clust(FIL * fp,FSIZE_t ofs)1614 static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1615 FIL* fp, /* Pointer to the file object */
1616 FSIZE_t ofs /* File offset to be converted to cluster# */
1617 )
1618 {
1619 DWORD cl, ncl, *tbl;
1620 FATFS *fs = fp->obj.fs;
1621
1622
1623 tbl = fp->cltbl + 1; /* Top of CLMT */
1624 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
1625 for (;;) {
1626 ncl = *tbl++; /* Number of cluters in the fragment */
1627 if (ncl == 0) return 0; /* End of table? (error) */
1628 if (cl < ncl) break; /* In this fragment? */
1629 cl -= ncl; tbl++; /* Next fragment */
1630 }
1631 return cl + *tbl; /* Return the cluster number */
1632 }
1633
1634 #endif /* FF_USE_FASTSEEK */
1635
1636
1637
1638
1639 /*-----------------------------------------------------------------------*/
1640 /* Directory handling - Fill a cluster with zeros */
1641 /*-----------------------------------------------------------------------*/
1642
1643 #if !FF_FS_READONLY
dir_clear(FATFS * fs,DWORD clst)1644 static FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */
1645 FATFS *fs, /* Filesystem object */
1646 DWORD clst /* Directory table to clear */
1647 )
1648 {
1649 DWORD sect;
1650 UINT n, szb;
1651 BYTE *ibuf;
1652
1653
1654 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
1655 sect = clst2sect(fs, clst); /* Top of the cluster */
1656 fs->winsect = sect; /* Set window to top of the cluster */
1657 mem_set(fs->win, 0, sizeof fs->win); /* Clear window buffer */
1658 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */
1659 /* Allocate a temporary buffer */
1660 for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs), ibuf = 0; szb > SS(fs) && (ibuf = ff_memalloc(szb)) == 0; szb /= 2) ;
1661 if (szb > SS(fs)) { /* Buffer allocated? */
1662 mem_set(ibuf, 0, szb);
1663 szb /= SS(fs); /* Bytes -> Sectors */
1664 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1665 ff_memfree(ibuf);
1666 } else
1667 #endif
1668 {
1669 ibuf = fs->win; szb = 1; /* Use window buffer (many single-sector writes may take a time) */
1670 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1671 }
1672 return (n == fs->csize) ? FR_OK : FR_DISK_ERR;
1673 }
1674 #endif /* !FF_FS_READONLY */
1675
1676
1677
1678
1679 /*-----------------------------------------------------------------------*/
1680 /* Directory handling - Set directory index */
1681 /*-----------------------------------------------------------------------*/
1682
dir_sdi(FF_DIR * dp,DWORD ofs)1683 static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1684 FF_DIR* dp, /* Pointer to directory object */
1685 DWORD ofs /* Offset of directory table */
1686 )
1687 {
1688 DWORD csz, clst;
1689 FATFS *fs = dp->obj.fs;
1690
1691
1692 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
1693 return FR_INT_ERR;
1694 }
1695 dp->dptr = ofs; /* Set current offset */
1696 clst = dp->obj.sclust; /* Table start cluster (0:root) */
1697 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
1698 clst = fs->dirbase;
1699 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
1700 }
1701
1702 if (clst == 0) { /* Static table (root-directory on the FAT volume) */
1703 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
1704 dp->sect = fs->dirbase;
1705
1706 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */
1707 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
1708 while (ofs >= csz) { /* Follow cluster chain */
1709 clst = get_fat(&dp->obj, clst); /* Get next cluster */
1710 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1711 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
1712 ofs -= csz;
1713 }
1714 dp->sect = clst2sect(fs, clst);
1715 }
1716 dp->clust = clst; /* Current cluster# */
1717 if (dp->sect == 0) return FR_INT_ERR;
1718 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
1719 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
1720
1721 return FR_OK;
1722 }
1723
1724
1725
1726
1727 /*-----------------------------------------------------------------------*/
1728 /* Directory handling - Move directory table index next */
1729 /*-----------------------------------------------------------------------*/
1730
dir_next(FF_DIR * dp,int stretch)1731 static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1732 FF_DIR* dp, /* Pointer to the directory object */
1733 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1734 )
1735 {
1736 DWORD ofs, clst;
1737 FATFS *fs = dp->obj.fs;
1738
1739
1740 ofs = dp->dptr + SZDIRE; /* Next entry */
1741 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) dp->sect = 0; /* Disable it if the offset reached the max value */
1742 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */
1743
1744 if (ofs % SS(fs) == 0) { /* Sector changed? */
1745 dp->sect++; /* Next sector */
1746
1747 if (dp->clust == 0) { /* Static table */
1748 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
1749 dp->sect = 0; return FR_NO_FILE;
1750 }
1751 }
1752 else { /* Dynamic table */
1753 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
1754 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
1755 if (clst <= 1) return FR_INT_ERR; /* Internal error */
1756 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1757 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */
1758 #if !FF_FS_READONLY
1759 if (!stretch) { /* If no stretch, report EOT */
1760 dp->sect = 0; return FR_NO_FILE;
1761 }
1762 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
1763 if (clst == 0) return FR_DENIED; /* No free cluster */
1764 if (clst == 1) return FR_INT_ERR; /* Internal error */
1765 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1766 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */
1767 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */
1768 #else
1769 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */
1770 dp->sect = 0; return FR_NO_FILE; /* Report EOT */
1771 #endif
1772 }
1773 dp->clust = clst; /* Initialize data for new cluster */
1774 dp->sect = clst2sect(fs, clst);
1775 }
1776 }
1777 }
1778 dp->dptr = ofs; /* Current entry */
1779 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
1780
1781 return FR_OK;
1782 }
1783
1784
1785
1786
1787 #if !FF_FS_READONLY
1788 /*-----------------------------------------------------------------------*/
1789 /* Directory handling - Reserve a block of directory entries */
1790 /*-----------------------------------------------------------------------*/
1791
dir_alloc(FF_DIR * dp,UINT nent)1792 static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1793 FF_DIR* dp, /* Pointer to the directory object */
1794 UINT nent /* Number of contiguous entries to allocate */
1795 )
1796 {
1797 FRESULT res;
1798 UINT n;
1799 FATFS *fs = dp->obj.fs;
1800
1801
1802 res = dir_sdi(dp, 0);
1803 if (res == FR_OK) {
1804 n = 0;
1805 do {
1806 res = move_window(fs, dp->sect);
1807 if (res != FR_OK) break;
1808 #if FF_FS_EXFAT
1809 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
1810 #else
1811 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
1812 #endif
1813 if (++n == nent) break; /* A block of contiguous free entries is found */
1814 } else {
1815 n = 0; /* Not a blank entry. Restart to search */
1816 }
1817 res = dir_next(dp, 1);
1818 } while (res == FR_OK); /* Next entry with table stretch enabled */
1819 }
1820
1821 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1822 return res;
1823 }
1824
1825 #endif /* !FF_FS_READONLY */
1826
1827
1828
1829
1830 /*-----------------------------------------------------------------------*/
1831 /* FAT: Directory handling - Load/Store start cluster number */
1832 /*-----------------------------------------------------------------------*/
1833
1834 static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1835 FATFS* fs, /* Pointer to the fs object */
1836 const BYTE* dir /* Pointer to the key entry */
1837 )
1838 {
1839 DWORD cl;
1840
1841 cl = ld_word(dir + DIR_FstClusLO);
1842 if (fs->fs_type == FS_FAT32) {
1843 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
1844 }
1845
1846 return cl;
1847 }
1848
1849
1850 #if !FF_FS_READONLY
1851 static void st_clust (
1852 FATFS* fs, /* Pointer to the fs object */
1853 BYTE* dir, /* Pointer to the key entry */
1854 DWORD cl /* Value to be set */
1855 )
1856 {
1857 st_word(dir + DIR_FstClusLO, (WORD)cl);
1858 if (fs->fs_type == FS_FAT32) {
1859 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
1860 }
1861 }
1862 #endif
1863
1864
1865
1866 #if FF_USE_LFN
1867 /*--------------------------------------------------------*/
1868 /* FAT-LFN: Compare a part of file name with an LFN entry */
1869 /*--------------------------------------------------------*/
1870
1871 static int cmp_lfn ( /* 1:matched, 0:not matched */
1872 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1873 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1874 )
1875 {
1876 UINT i, s;
1877 WCHAR wc, uc;
1878
1879
1880 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1881
1882 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1883
1884 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1885 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1886 if (wc != 0) {
1887 if (i >= FF_MAX_LFN + 1 || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
1888 return 0; /* Not matched */
1889 }
1890 wc = uc;
1891 } else {
1892 if (uc != 0xFFFF) return 0; /* Check filler */
1893 }
1894 }
1895
1896 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
1897
1898 return 1; /* The part of LFN matched */
1899 }
1900
1901
1902 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
1903 /*-----------------------------------------------------*/
1904 /* FAT-LFN: Pick a part of file name from an LFN entry */
1905 /*-----------------------------------------------------*/
1906
1907 static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1908 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1909 BYTE* dir /* Pointer to the LFN entry */
1910 )
1911 {
1912 UINT i, s;
1913 WCHAR wc, uc;
1914
1915
1916 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */
1917
1918 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */
1919
1920 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1921 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1922 if (wc != 0) {
1923 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1924 lfnbuf[i++] = wc = uc; /* Store it */
1925 } else {
1926 if (uc != 0xFFFF) return 0; /* Check filler */
1927 }
1928 }
1929
1930 if (dir[LDIR_Ord] & LLEF && wc != 0) { /* Put terminator if it is the last LFN part and not terminated */
1931 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1932 lfnbuf[i] = 0;
1933 }
1934
1935 return 1; /* The part of LFN is valid */
1936 }
1937 #endif
1938
1939
1940 #if !FF_FS_READONLY
1941 /*-----------------------------------------*/
1942 /* FAT-LFN: Create an entry of LFN entries */
1943 /*-----------------------------------------*/
1944
1945 static void put_lfn (
1946 const WCHAR* lfn, /* Pointer to the LFN */
1947 BYTE* dir, /* Pointer to the LFN entry to be created */
1948 BYTE ord, /* LFN order (1-20) */
1949 BYTE sum /* Checksum of the corresponding SFN */
1950 )
1951 {
1952 UINT i, s;
1953 WCHAR wc;
1954
1955
1956 dir[LDIR_Chksum] = sum; /* Set checksum */
1957 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1958 dir[LDIR_Type] = 0;
1959 st_word(dir + LDIR_FstClusLO, 0);
1960
1961 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1962 s = wc = 0;
1963 do {
1964 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
1965 st_word(dir + LfnOfs[s], wc); /* Put it */
1966 if (wc == 0) wc = 0xFFFF; /* Padding characters for left locations */
1967 } while (++s < 13);
1968 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
1969 dir[LDIR_Ord] = ord; /* Set the LFN order */
1970 }
1971
1972 #endif /* !FF_FS_READONLY */
1973 #endif /* FF_USE_LFN */
1974
1975
1976
1977 #if FF_USE_LFN && !FF_FS_READONLY
1978 /*-----------------------------------------------------------------------*/
1979 /* FAT-LFN: Create a Numbered SFN */
1980 /*-----------------------------------------------------------------------*/
1981
1982 static void gen_numname (
1983 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1984 const BYTE* src, /* Pointer to SFN */
1985 const WCHAR* lfn, /* Pointer to LFN */
1986 UINT seq /* Sequence number */
1987 )
1988 {
1989 BYTE ns[8], c;
1990 UINT i, j;
1991 WCHAR wc;
1992 DWORD sr;
1993
1994
1995 mem_cpy(dst, src, 11);
1996
1997 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
1998 sr = seq;
1999 while (*lfn) { /* Create a CRC as hash value */
2000 wc = *lfn++;
2001 for (i = 0; i < 16; i++) {
2002 sr = (sr << 1) + (wc & 1);
2003 wc >>= 1;
2004 if (sr & 0x10000) sr ^= 0x11021;
2005 }
2006 }
2007 seq = (UINT)sr;
2008 }
2009
2010 /* itoa (hexdecimal) */
2011 i = 7;
2012 do {
2013 c = (BYTE)((seq % 16) + '0');
2014 if (c > '9') c += 7;
2015 ns[i--] = c;
2016 seq /= 16;
2017 } while (seq);
2018 ns[i] = '~';
2019
2020 /* Append the number to the SFN body */
2021 for (j = 0; j < i && dst[j] != ' '; j++) {
2022 if (dbc_1st(dst[j])) {
2023 if (j == i - 1) break;
2024 j++;
2025 }
2026 }
2027 do {
2028 dst[j++] = (i < 8) ? ns[i++] : ' ';
2029 } while (j < 8);
2030 }
2031 #endif /* FF_USE_LFN && !FF_FS_READONLY */
2032
2033
2034
2035 #if FF_USE_LFN
2036 /*-----------------------------------------------------------------------*/
2037 /* FAT-LFN: Calculate checksum of an SFN entry */
2038 /*-----------------------------------------------------------------------*/
2039
2040 static BYTE sum_sfn (
2041 const BYTE* dir /* Pointer to the SFN entry */
2042 )
2043 {
2044 BYTE sum = 0;
2045 UINT n = 11;
2046
2047 do {
2048 sum = (sum >> 1) + (sum << 7) + *dir++;
2049 } while (--n);
2050 return sum;
2051 }
2052
2053 #endif /* FF_USE_LFN */
2054
2055
2056
2057 #if FF_FS_EXFAT
2058 /*-----------------------------------------------------------------------*/
2059 /* exFAT: Checksum */
2060 /*-----------------------------------------------------------------------*/
2061
2062 static WORD xdir_sum ( /* Get checksum of the directoly entry block */
2063 const BYTE* dir /* Directory entry block to be calculated */
2064 )
2065 {
2066 UINT i, szblk;
2067 WORD sum;
2068
2069
2070 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; /* Number of bytes of the entry block */
2071 for (i = sum = 0; i < szblk; i++) {
2072 if (i == XDIR_SetSum) { /* Skip 2-byte sum field */
2073 i++;
2074 } else {
2075 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
2076 }
2077 }
2078 return sum;
2079 }
2080
2081
2082
2083 static WORD xname_sum ( /* Get check sum (to be used as hash) of the file name */
2084 const WCHAR* name /* File name to be calculated */
2085 )
2086 {
2087 WCHAR chr;
2088 WORD sum = 0;
2089
2090
2091 while ((chr = *name++) != 0) {
2092 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be up-case converted */
2093 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
2094 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
2095 }
2096 return sum;
2097 }
2098
2099
2100 #if !FF_FS_READONLY && FF_USE_MKFS
2101 static DWORD xsum32 ( /* Returns 32-bit checksum */
2102 BYTE dat, /* Byte to be calculated (byte-by-byte processing) */
2103 DWORD sum /* Previous sum value */
2104 )
2105 {
2106 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
2107 return sum;
2108 }
2109 #endif
2110
2111
2112 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2113 /*------------------------------------------------------*/
2114 /* exFAT: Get object information from a directory block */
2115 /*------------------------------------------------------*/
2116
2117 static void get_xfileinfo (
2118 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */
2119 FILINFO* fno /* Buffer to store the extracted file information */
2120 )
2121 {
2122 WCHAR wc, hs;
2123 UINT di, si, nc;
2124
2125 /* Get file name from the entry block */
2126 si = SZDIRE * 2; /* 1st C1 entry */
2127 nc = 0; hs = 0; di = 0;
2128 while (nc < dirb[XDIR_NumName]) {
2129 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */
2130 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
2131 wc = ld_word(dirb + si); si += 2; nc++; /* Get a character */
2132 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2133 hs = wc; continue; /* Get low surrogate */
2134 }
2135 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2136 if (wc == 0) { di = 0; break; } /* Buffer overflow or wrong encoding? */
2137 di += wc;
2138 hs = 0;
2139 }
2140 if (hs != 0) di = 0; /* Broken surrogate pair? */
2141 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */
2142 fno->fname[di] = 0; /* Terminate the name */
2143 fno->altname[0] = 0; /* exFAT does not support SFN */
2144
2145 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */
2146 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */
2147 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */
2148 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */
2149 }
2150
2151 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2152
2153
2154 /*-----------------------------------*/
2155 /* exFAT: Get a directry entry block */
2156 /*-----------------------------------*/
2157
2158 static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
2159 FF_DIR* dp /* Reading direcotry object pointing top of the entry block to load */
2160 )
2161 {
2162 FRESULT res;
2163 UINT i, sz_ent;
2164 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
2165
2166
2167 /* Load file-directory entry */
2168 res = move_window(dp->obj.fs, dp->sect);
2169 if (res != FR_OK) return res;
2170 if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR; /* Invalid order */
2171 mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);
2172 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE;
2173 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR;
2174
2175 /* Load stream-extension entry */
2176 res = dir_next(dp, 0);
2177 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2178 if (res != FR_OK) return res;
2179 res = move_window(dp->obj.fs, dp->sect);
2180 if (res != FR_OK) return res;
2181 if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR; /* Invalid order */
2182 mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);
2183 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR;
2184
2185 /* Load file-name entries */
2186 i = 2 * SZDIRE; /* Name offset to load */
2187 do {
2188 res = dir_next(dp, 0);
2189 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2190 if (res != FR_OK) return res;
2191 res = move_window(dp->obj.fs, dp->sect);
2192 if (res != FR_OK) return res;
2193 if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR; /* Invalid order */
2194 if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE);
2195 } while ((i += SZDIRE) < sz_ent);
2196
2197 /* Sanity check (do it for only accessible object) */
2198 if (i <= MAXDIRB(FF_MAX_LFN)) {
2199 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
2200 }
2201 return FR_OK;
2202 }
2203
2204
2205 /*------------------------------------------------------------------*/
2206 /* exFAT: Initialize object allocation info with loaded entry block */
2207 /*------------------------------------------------------------------*/
2208
2209 static void init_alloc_info (
2210 FATFS* fs, /* Filesystem object */
2211 FFOBJID* obj /* Object allocation information to be initialized */
2212 )
2213 {
2214 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */
2215 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2216 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */
2217 obj->n_frag = 0; /* No last fragment info */
2218 }
2219
2220
2221
2222 #if !FF_FS_READONLY || FF_FS_RPATH != 0
2223 /*------------------------------------------------*/
2224 /* exFAT: Load the object's directory entry block */
2225 /*------------------------------------------------*/
2226
2227 static FRESULT load_obj_xdir (
2228 FF_DIR* dp, /* Blank directory object to be used to access containing direcotry */
2229 const FFOBJID* obj /* Object with its containing directory information */
2230 )
2231 {
2232 FRESULT res;
2233
2234 /* Open object containing directory */
2235 dp->obj.fs = obj->fs;
2236 dp->obj.sclust = obj->c_scl;
2237 dp->obj.stat = (BYTE)obj->c_size;
2238 dp->obj.objsize = obj->c_size & 0xFFFFFF00;
2239 dp->obj.n_frag = 0;
2240 dp->blk_ofs = obj->c_ofs;
2241
2242 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */
2243 if (res == FR_OK) {
2244 res = load_xdir(dp); /* Load the object's entry block */
2245 }
2246 return res;
2247 }
2248 #endif
2249
2250
2251 #if !FF_FS_READONLY
2252 /*----------------------------------------*/
2253 /* exFAT: Store the directory entry block */
2254 /*----------------------------------------*/
2255
2256 static FRESULT store_xdir (
2257 FF_DIR* dp /* Pointer to the direcotry object */
2258 )
2259 {
2260 FRESULT res;
2261 UINT nent;
2262 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
2263
2264 /* Create set sum */
2265 st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
2266 nent = dirb[XDIR_NumSec] + 1;
2267
2268 /* Store the direcotry entry block to the directory */
2269 res = dir_sdi(dp, dp->blk_ofs);
2270 while (res == FR_OK) {
2271 res = move_window(dp->obj.fs, dp->sect);
2272 if (res != FR_OK) break;
2273 mem_cpy(dp->dir, dirb, SZDIRE);
2274 dp->obj.fs->wflag = 1;
2275 if (--nent == 0) break;
2276 dirb += SZDIRE;
2277 res = dir_next(dp, 0);
2278 }
2279 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
2280 }
2281
2282
2283
2284 /*-------------------------------------------*/
2285 /* exFAT: Create a new directory enrty block */
2286 /*-------------------------------------------*/
2287
2288 static void create_xdir (
2289 BYTE* dirb, /* Pointer to the direcotry entry block buffer */
2290 const WCHAR* lfn /* Pointer to the object name */
2291 )
2292 {
2293 UINT i;
2294 BYTE nc1, nlen;
2295 WCHAR wc;
2296
2297
2298 /* Create file-directory and stream-extension entry */
2299 mem_set(dirb, 0, 2 * SZDIRE);
2300 dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR;
2301 dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM;
2302
2303 /* Create file-name entries */
2304 i = SZDIRE * 2; /* Top of file_name entries */
2305 nlen = nc1 = 0; wc = 1;
2306 do {
2307 dirb[i++] = ET_FILENAME; dirb[i++] = 0;
2308 do { /* Fill name field */
2309 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */
2310 st_word(dirb + i, wc); /* Store it */
2311 i += 2;
2312 } while (i % SZDIRE != 0);
2313 nc1++;
2314 } while (lfn[nlen]); /* Fill next entry if any char follows */
2315
2316 dirb[XDIR_NumName] = nlen; /* Set name length */
2317 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */
2318 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
2319 }
2320
2321 #endif /* !FF_FS_READONLY */
2322 #endif /* FF_FS_EXFAT */
2323
2324
2325
2326 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
2327 /*-----------------------------------------------------------------------*/
2328 /* Read an object from the directory */
2329 /*-----------------------------------------------------------------------*/
2330
2331 #define DIR_READ_FILE(dp) dir_read(dp, 0)
2332 #define DIR_READ_LABEL(dp) dir_read(dp, 1)
2333
2334 static FRESULT dir_read (
2335 FF_DIR* dp, /* Pointer to the directory object */
2336 int vol /* Filtered by 0:file/directory or 1:volume label */
2337 )
2338 {
2339 FRESULT res = FR_NO_FILE;
2340 FATFS *fs = dp->obj.fs;
2341 BYTE attr, b;
2342 #if FF_USE_LFN
2343 BYTE ord = 0xFF, sum = 0xFF;
2344 #endif
2345
2346 while (dp->sect) {
2347 res = move_window(fs, dp->sect);
2348 if (res != FR_OK) break;
2349 b = dp->dir[DIR_Name]; /* Test for the entry type */
2350 if (b == 0) {
2351 res = FR_NO_FILE; break; /* Reached to end of the directory */
2352 }
2353 #if FF_FS_EXFAT
2354 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2355 if (FF_USE_LABEL && vol) {
2356 if (b == ET_VLABEL) break; /* Volume label entry? */
2357 } else {
2358 if (b == ET_FILEDIR) { /* Start of the file entry block? */
2359 dp->blk_ofs = dp->dptr; /* Get location of the block */
2360 res = load_xdir(dp); /* Load the entry block */
2361 if (res == FR_OK) {
2362 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
2363 }
2364 break;
2365 }
2366 }
2367 } else
2368 #endif
2369 { /* On the FAT/FAT32 volume */
2370 dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
2371 #if FF_USE_LFN /* LFN configuration */
2372 if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
2373 ord = 0xFF;
2374 } else {
2375 if (attr == AM_LFN) { /* An LFN entry is found */
2376 if (b & LLEF) { /* Is it start of an LFN sequence? */
2377 sum = dp->dir[LDIR_Chksum];
2378 b &= (BYTE)~LLEF; ord = b;
2379 dp->blk_ofs = dp->dptr;
2380 }
2381 /* Check LFN validity and capture it */
2382 ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2383 } else { /* An SFN entry is found */
2384 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
2385 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
2386 }
2387 break;
2388 }
2389 }
2390 #else /* Non LFN configuration */
2391 if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
2392 break;
2393 }
2394 #endif
2395 }
2396 res = dir_next(dp, 0); /* Next entry */
2397 if (res != FR_OK) break;
2398 }
2399
2400 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
2401 return res;
2402 }
2403
2404 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
2405
2406
2407
2408 /*-----------------------------------------------------------------------*/
2409 /* Directory handling - Find an object in the directory */
2410 /*-----------------------------------------------------------------------*/
2411
2412 static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
2413 FF_DIR* dp /* Pointer to the directory object with the file name */
2414 )
2415 {
2416 FRESULT res;
2417 FATFS *fs = dp->obj.fs;
2418 BYTE c;
2419 #if FF_USE_LFN
2420 BYTE a, ord, sum;
2421 #endif
2422
2423 res = dir_sdi(dp, 0); /* Rewind directory object */
2424 if (res != FR_OK) return res;
2425 #if FF_FS_EXFAT
2426 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2427 BYTE nc;
2428 UINT di, ni;
2429 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
2430
2431 while ((res = DIR_READ_FILE(dp)) == FR_OK) { /* Read an item */
2432 #if FF_MAX_LFN < 255
2433 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */
2434 #endif
2435 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */
2436 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
2437 if ((di % SZDIRE) == 0) di += 2;
2438 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
2439 }
2440 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
2441 }
2442 return res;
2443 }
2444 #endif
2445 /* On the FAT/FAT32 volume */
2446 #if FF_USE_LFN
2447 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2448 #endif
2449 do {
2450 res = move_window(fs, dp->sect);
2451 if (res != FR_OK) break;
2452 c = dp->dir[DIR_Name];
2453 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
2454 #if FF_USE_LFN /* LFN configuration */
2455 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
2456 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
2457 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2458 } else {
2459 if (a == AM_LFN) { /* An LFN entry is found */
2460 if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
2461 if (c & LLEF) { /* Is it start of LFN sequence? */
2462 sum = dp->dir[LDIR_Chksum];
2463 c &= (BYTE)~LLEF; ord = c; /* LFN start order */
2464 dp->blk_ofs = dp->dptr; /* Start offset of LFN */
2465 }
2466 /* Check validity of the LFN entry and compare it with given name */
2467 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2468 }
2469 } else { /* An SFN entry is found */
2470 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
2471 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
2472 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2473 }
2474 }
2475 #else /* Non LFN configuration */
2476 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
2477 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
2478 #endif
2479 res = dir_next(dp, 0); /* Next entry */
2480 } while (res == FR_OK);
2481
2482 return res;
2483 }
2484
2485
2486
2487
2488 #if !FF_FS_READONLY
2489 /*-----------------------------------------------------------------------*/
2490 /* Register an object to the directory */
2491 /*-----------------------------------------------------------------------*/
2492
2493 static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
2494 FF_DIR* dp /* Target directory with object name to be created */
2495 )
2496 {
2497 FRESULT res;
2498 FATFS *fs = dp->obj.fs;
2499 #if FF_USE_LFN /* LFN configuration */
2500 UINT n, nlen, nent;
2501 BYTE sn[12], sum;
2502
2503
2504 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
2505 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */
2506
2507 #if FF_FS_EXFAT
2508 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2509 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
2510 res = dir_alloc(dp, nent); /* Allocate directory entries */
2511 if (res != FR_OK) return res;
2512 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */
2513
2514 if (dp->obj.stat & 4) { /* Has the directory been stretched by new allocation? */
2515 dp->obj.stat &= ~4;
2516 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */
2517 if (res != FR_OK) return res;
2518 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */
2519 if (res != FR_OK) return res;
2520 if (dp->obj.sclust != 0) { /* Is it a sub-directory? */
2521 FF_DIR dj;
2522
2523 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */
2524 if (res != FR_OK) return res;
2525 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */
2526 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize); /* Update the allocation status */
2527 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
2528 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1;
2529 res = store_xdir(&dj); /* Store the object status */
2530 if (res != FR_OK) return res;
2531 }
2532 }
2533
2534 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
2535 return FR_OK;
2536 }
2537 #endif
2538 /* On the FAT/FAT32 volume */
2539 mem_cpy(sn, dp->fn, 12);
2540 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
2541 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
2542 for (n = 1; n < 100; n++) {
2543 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
2544 res = dir_find(dp); /* Check if the name collides with existing SFN */
2545 if (res != FR_OK) break;
2546 }
2547 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
2548 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
2549 dp->fn[NSFLAG] = sn[NSFLAG];
2550 }
2551
2552 /* Create an SFN with/without LFNs. */
2553 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */
2554 res = dir_alloc(dp, nent); /* Allocate entries */
2555 if (res == FR_OK && --nent) { /* Set LFN entry if needed */
2556 res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
2557 if (res == FR_OK) {
2558 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
2559 do { /* Store LFN entries in bottom first */
2560 res = move_window(fs, dp->sect);
2561 if (res != FR_OK) break;
2562 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
2563 fs->wflag = 1;
2564 res = dir_next(dp, 0); /* Next entry */
2565 } while (res == FR_OK && --nent);
2566 }
2567 }
2568
2569 #else /* Non LFN configuration */
2570 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
2571
2572 #endif
2573
2574 /* Set SFN entry */
2575 if (res == FR_OK) {
2576 res = move_window(fs, dp->sect);
2577 if (res == FR_OK) {
2578 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */
2579 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
2580 #if FF_USE_LFN
2581 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
2582 #endif
2583 fs->wflag = 1;
2584 }
2585 }
2586
2587 return res;
2588 }
2589
2590 #endif /* !FF_FS_READONLY */
2591
2592
2593
2594 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0
2595 /*-----------------------------------------------------------------------*/
2596 /* Remove an object from the directory */
2597 /*-----------------------------------------------------------------------*/
2598
2599 static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
2600 FF_DIR* dp /* Directory object pointing the entry to be removed */
2601 )
2602 {
2603 FRESULT res;
2604 FATFS *fs = dp->obj.fs;
2605 #if FF_USE_LFN /* LFN configuration */
2606 DWORD last = dp->dptr;
2607
2608 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
2609 if (res == FR_OK) {
2610 do {
2611 res = move_window(fs, dp->sect);
2612 if (res != FR_OK) break;
2613 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2614 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */
2615 } else { /* On the FAT/FAT32 volume */
2616 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */
2617 }
2618 fs->wflag = 1;
2619 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
2620 res = dir_next(dp, 0); /* Next entry */
2621 } while (res == FR_OK);
2622 if (res == FR_NO_FILE) res = FR_INT_ERR;
2623 }
2624 #else /* Non LFN configuration */
2625
2626 res = move_window(fs, dp->sect);
2627 if (res == FR_OK) {
2628 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/
2629 fs->wflag = 1;
2630 }
2631 #endif
2632
2633 return res;
2634 }
2635
2636 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */
2637
2638
2639
2640 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2641 /*-----------------------------------------------------------------------*/
2642 /* Get file information from directory entry */
2643 /*-----------------------------------------------------------------------*/
2644
2645 static void get_fileinfo (
2646 FF_DIR* dp, /* Pointer to the directory object */
2647 FILINFO* fno /* Pointer to the file information to be filled */
2648 )
2649 {
2650 UINT si, di;
2651 #if FF_USE_LFN
2652 BYTE lcf;
2653 WCHAR wc, hs;
2654 FATFS *fs = dp->obj.fs;
2655 #else
2656 TCHAR c;
2657 #endif
2658
2659
2660 fno->fname[0] = 0; /* Invaidate file info */
2661 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */
2662
2663 #if FF_USE_LFN /* LFN configuration */
2664 #if FF_FS_EXFAT
2665 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2666 get_xfileinfo(fs->dirbuf, fno);
2667 return;
2668 } else
2669 #endif
2670 { /* On the FAT/FAT32 volume */
2671 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
2672 si = di = hs = 0;
2673 while (fs->lfnbuf[si] != 0) {
2674 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */
2675 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2676 hs = wc; continue; /* Get low surrogate */
2677 }
2678 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */
2679 if (wc == 0) { di = 0; break; } /* Invalid char or buffer overflow? */
2680 di += wc;
2681 hs = 0;
2682 }
2683 if (hs != 0) di = 0; /* Broken surrogate pair? */
2684 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */
2685 }
2686 }
2687
2688 si = di = 0;
2689 while (si < 11) { /* Get SFN from SFN entry */
2690 wc = dp->dir[si++]; /* Get a char */
2691 if (wc == ' ') continue; /* Skip padding spaces */
2692 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */
2693 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */
2694 #if FF_LFN_UNICODE >= 1 /* Unicode output */
2695 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */
2696 wc = wc << 8 | dp->dir[si++];
2697 }
2698 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */
2699 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */
2700 wc = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in Unicode */
2701 if (wc == 0) { di = 0; break; } /* Buffer overflow? */
2702 di += wc;
2703 #else /* ANSI/OEM output */
2704 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */
2705 #endif
2706 }
2707 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */
2708
2709 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */
2710 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */
2711 fno->fname[di++] = '?';
2712 } else {
2713 for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */
2714 wc = (WCHAR)fno->altname[si];
2715 if (wc == '.') lcf = NS_EXT;
2716 if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20;
2717 fno->fname[di] = (TCHAR)wc;
2718 }
2719 }
2720 fno->fname[di] = 0; /* Terminate the LFN */
2721 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */
2722 }
2723
2724 #else /* Non-LFN configuration */
2725 si = di = 0;
2726 while (si < 11) { /* Copy name body and extension */
2727 c = (TCHAR)dp->dir[si++];
2728 if (c == ' ') continue; /* Skip padding spaces */
2729 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */
2730 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */
2731 fno->fname[di++] = c;
2732 }
2733 fno->fname[di] = 0;
2734 #endif
2735
2736 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */
2737 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
2738 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */
2739 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */
2740 }
2741
2742 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2743
2744
2745
2746 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1
2747 /*-----------------------------------------------------------------------*/
2748 /* Pattern matching */
2749 /*-----------------------------------------------------------------------*/
2750
2751 static DWORD get_achar ( /* Get a character and advances ptr */
2752 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */
2753 )
2754 {
2755 DWORD chr;
2756
2757
2758 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */
2759 chr = tchar2uni(ptr);
2760 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */
2761 chr = ff_wtoupper(chr);
2762
2763 #else /* ANSI/OEM input */
2764 chr = (BYTE)*(*ptr)++; /* Get a byte */
2765 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
2766 #if FF_CODE_PAGE == 0
2767 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2768 #elif FF_CODE_PAGE < 900
2769 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2770 #endif
2771 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900
2772 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */
2773 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0;
2774 }
2775 #endif
2776
2777 #endif
2778 return chr;
2779 }
2780
2781
2782 static int pattern_matching ( /* 0:not matched, 1:matched */
2783 const TCHAR* pat, /* Matching pattern */
2784 const TCHAR* nam, /* String to be tested */
2785 int skip, /* Number of pre-skip chars (number of ?s) */
2786 int inf /* Infinite search (* specified) */
2787 )
2788 {
2789 const TCHAR *pp, *np;
2790 DWORD pc, nc;
2791 int nm, nx;
2792
2793
2794 while (skip--) { /* Pre-skip name chars */
2795 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
2796 }
2797 if (*pat == 0 && inf) return 1; /* (short circuit) */
2798
2799 do {
2800 pp = pat; np = nam; /* Top of pattern and name to match */
2801 for (;;) {
2802 if (*pp == '?' || *pp == '*') { /* Wildcard? */
2803 nm = nx = 0;
2804 do { /* Analyze the wildcard block */
2805 if (*pp++ == '?') nm++; else nx = 1;
2806 } while (*pp == '?' || *pp == '*');
2807 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
2808 nc = *np; break; /* Branch mismatched */
2809 }
2810 pc = get_achar(&pp); /* Get a pattern char */
2811 nc = get_achar(&np); /* Get a name char */
2812 if (pc != nc) break; /* Branch mismatched? */
2813 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */
2814 }
2815 get_achar(&nam); /* nam++ */
2816 } while (inf && nc); /* Retry until end of name if infinite search is specified */
2817
2818 return 0;
2819 }
2820
2821 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
2822
2823
2824
2825 /*-----------------------------------------------------------------------*/
2826 /* Pick a top segment and create the object name in directory form */
2827 /*-----------------------------------------------------------------------*/
2828
2829 static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
2830 FF_DIR* dp, /* Pointer to the directory object */
2831 const TCHAR** path /* Pointer to pointer to the segment in the path string */
2832 )
2833 {
2834 #if FF_USE_LFN /* LFN configuration */
2835 BYTE b, cf;
2836 WCHAR wc, *lfn;
2837 DWORD uc;
2838 UINT i, ni, si, di;
2839 const TCHAR *p;
2840
2841
2842 /* Create LFN into LFN working buffer */
2843 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0;
2844 for (;;) {
2845 uc = tchar2uni(&p); /* Get a character */
2846 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */
2847 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */
2848 wc = (WCHAR)uc;
2849 if (wc < ' ' || wc == '/' || wc == '\\') break; /* Break if end of the path or a separator is found */
2850 if (wc < 0x80 && chk_chr("\"*:<>\?|\x7F", wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
2851 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
2852 lfn[di++] = wc; /* Store the Unicode character */
2853 }
2854 while (*p == '/' || *p == '\\') p++; /* Skip duplicated separators if exist */
2855 *path = p; /* Return pointer to the next segment */
2856 cf = (wc < ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
2857
2858 #if FF_FS_RPATH != 0
2859 if ((di == 1 && lfn[di - 1] == '.') ||
2860 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
2861 lfn[di] = 0;
2862 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */
2863 dp->fn[i] = (i < di) ? '.' : ' ';
2864 }
2865 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2866 return FR_OK;
2867 }
2868 #endif
2869 while (di) { /* Snip off trailing spaces and dots if exist */
2870 wc = lfn[di - 1];
2871 if (wc != ' ' && wc != '.') break;
2872 di--;
2873 }
2874 lfn[di] = 0; /* LFN is created into the working buffer */
2875 if (di == 0) return FR_INVALID_NAME; /* Reject null name */
2876
2877 /* Create SFN in directory form */
2878 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */
2879 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */
2880 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */
2881
2882 mem_set(dp->fn, ' ', 11);
2883 i = b = 0; ni = 8;
2884 for (;;) {
2885 wc = lfn[si++]; /* Get an LFN character */
2886 if (wc == 0) break; /* Break on end of the LFN */
2887 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */
2888 cf |= NS_LOSS | NS_LFN;
2889 continue;
2890 }
2891
2892 if (i >= ni || si == di) { /* End of field? */
2893 if (ni == 11) { /* Name extension overflow? */
2894 cf |= NS_LOSS | NS_LFN;
2895 break;
2896 }
2897 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */
2898 if (si > di) break; /* No name extension? */
2899 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */
2900 continue;
2901 }
2902
2903 if (wc >= 0x80) { /* Is this a non-ASCII character? */
2904 cf |= NS_LFN; /* LFN entry needs to be created */
2905 #if FF_CODE_PAGE == 0
2906 if (ExCvt) { /* At SBCS */
2907 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2908 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2909 } else { /* At DBCS */
2910 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */
2911 }
2912 #elif FF_CODE_PAGE < 900 /* SBCS cfg */
2913 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2914 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2915 #else /* DBCS cfg */
2916 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */
2917 #endif
2918 }
2919
2920 if (wc >= 0x100) { /* Is this a DBC? */
2921 if (i >= ni - 1) { /* Field overflow? */
2922 cf |= NS_LOSS | NS_LFN;
2923 i = ni; continue; /* Next field */
2924 }
2925 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */
2926 } else { /* SBC */
2927 if (wc == 0 || chk_chr("+,;=[]", wc)) { /* Replace illegal characters for SFN if needed */
2928 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2929 } else {
2930 if (IsUpper(wc)) { /* ASCII upper case? */
2931 b |= 2;
2932 }
2933 if (IsLower(wc)) { /* ASCII lower case? */
2934 b |= 1; wc -= 0x20;
2935 }
2936 }
2937 }
2938 dp->fn[i++] = (BYTE)wc;
2939 }
2940
2941 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2942
2943 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */
2944 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */
2945 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2946 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */
2947 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */
2948 }
2949
2950 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */
2951
2952 return FR_OK;
2953
2954
2955 #else /* FF_USE_LFN : Non-LFN configuration */
2956 BYTE c, d, *sfn;
2957 UINT ni, si, i;
2958 const char *p;
2959
2960 /* Create file name in directory form */
2961 p = *path; sfn = dp->fn;
2962 mem_set(sfn, ' ', 11);
2963 si = i = 0; ni = 8;
2964 #if FF_FS_RPATH != 0
2965 if (p[si] == '.') { /* Is this a dot entry? */
2966 for (;;) {
2967 c = (BYTE)p[si++];
2968 if (c != '.' || si >= 3) break;
2969 sfn[i++] = c;
2970 }
2971 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
2972 *path = p + si; /* Return pointer to the next segment */
2973 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
2974 return FR_OK;
2975 }
2976 #endif
2977 for (;;) {
2978 c = (BYTE)p[si++]; /* Get a byte */
2979 if (c <= ' ') break; /* Break if end of the path name */
2980 if (c == '/' || c == '\\') { /* Break if a separator is found */
2981 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
2982 break;
2983 }
2984 if (c == '.' || i >= ni) { /* End of body or field overflow? */
2985 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */
2986 i = 8; ni = 11; /* Enter file extension field */
2987 continue;
2988 }
2989 #if FF_CODE_PAGE == 0
2990 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */
2991 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
2992 }
2993 #elif FF_CODE_PAGE < 900
2994 if (c >= 0x80) { /* Is SBC extended character? */
2995 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
2996 }
2997 #endif
2998 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */
2999 d = (BYTE)p[si++]; /* Get 2nd byte */
3000 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
3001 sfn[i++] = c;
3002 sfn[i++] = d;
3003 } else { /* SBC */
3004 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
3005 if (IsLower(c)) c -= 0x20; /* To upper */
3006 sfn[i++] = c;
3007 }
3008 }
3009 *path = p + si; /* Return pointer to the next segment */
3010 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
3011
3012 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
3013 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
3014
3015 return FR_OK;
3016 #endif /* FF_USE_LFN */
3017 }
3018
3019
3020
3021
3022 /*-----------------------------------------------------------------------*/
3023 /* Follow a file path */
3024 /*-----------------------------------------------------------------------*/
3025
3026 static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
3027 FF_DIR* dp, /* Directory object to return last directory and found object */
3028 const TCHAR* path /* Full-path string to find a file or directory */
3029 )
3030 {
3031 FRESULT res;
3032 BYTE ns;
3033 FATFS *fs = dp->obj.fs;
3034
3035
3036 #if FF_FS_RPATH != 0
3037 if (*path != '/' && *path != '\\') { /* Without heading separator */
3038 dp->obj.sclust = fs->cdir; /* Start from current directory */
3039 } else
3040 #endif
3041 { /* With heading separator */
3042 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */
3043 dp->obj.sclust = 0; /* Start from root directory */
3044 }
3045 #if FF_FS_EXFAT
3046 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */
3047 #if FF_FS_RPATH != 0
3048 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */
3049 FF_DIR dj;
3050
3051 dp->obj.c_scl = fs->cdc_scl;
3052 dp->obj.c_size = fs->cdc_size;
3053 dp->obj.c_ofs = fs->cdc_ofs;
3054 res = load_obj_xdir(&dj, &dp->obj);
3055 if (res != FR_OK) return res;
3056 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
3057 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3058 }
3059 #endif
3060 #endif
3061
3062 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
3063 dp->fn[NSFLAG] = NS_NONAME;
3064 res = dir_sdi(dp, 0);
3065
3066 } else { /* Follow path */
3067 for (;;) {
3068 res = create_name(dp, &path); /* Get a segment name of the path */
3069 if (res != FR_OK) break;
3070 res = dir_find(dp); /* Find an object with the segment name */
3071 ns = dp->fn[NSFLAG];
3072 if (res != FR_OK) { /* Failed to find the object */
3073 if (res == FR_NO_FILE) { /* Object is not found */
3074 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
3075 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
3076 dp->fn[NSFLAG] = NS_NONAME;
3077 res = FR_OK;
3078 } else { /* Could not find the object */
3079 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
3080 }
3081 }
3082 break;
3083 }
3084 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
3085 /* Get into the sub-directory */
3086 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
3087 res = FR_NO_PATH; break;
3088 }
3089 #if FF_FS_EXFAT
3090 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */
3091 dp->obj.c_scl = dp->obj.sclust;
3092 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
3093 dp->obj.c_ofs = dp->blk_ofs;
3094 init_alloc_info(fs, &dp->obj); /* Open next directory */
3095 } else
3096 #endif
3097 {
3098 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
3099 }
3100 }
3101 }
3102
3103 return res;
3104 }
3105
3106
3107
3108
3109 /*-----------------------------------------------------------------------*/
3110 /* Get logical drive number from path name */
3111 /*-----------------------------------------------------------------------*/
3112
3113 static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive number or null pointer) */
3114 const TCHAR** path /* Pointer to pointer to the path name */
3115 )
3116 {
3117 const TCHAR *tp, *tt;
3118 TCHAR tc;
3119 int i, vol = -1;
3120 #if FF_STR_VOLUME_ID /* Find string volume ID */
3121 const char *sp;
3122 char c;
3123 #endif
3124
3125 tt = tp = *path;
3126 if (!tp) return vol; /* Invalid path name? */
3127 do tc = *tt++; while ((UINT)tc >= (FF_USE_LFN ? ' ' : '!') && tc != ':'); /* Find a colon in the path */
3128
3129 if (tc == ':') { /* DOS/Windows style volume ID? */
3130 i = FF_VOLUMES;
3131 if (IsDigit(*tp) && tp + 2 == tt) { /* Is there a numeric volume ID + colon? */
3132 i = (int)*tp - '0'; /* Get the LD number */
3133 }
3134 #if FF_STR_VOLUME_ID == 1 /* Arbitrary string is enabled */
3135 else {
3136 i = 0;
3137 do {
3138 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */
3139 do { /* Compare the volume ID with path name */
3140 c = *sp++; tc = *tp++;
3141 if (IsLower(c)) c -= 0x20;
3142 if (IsLower(tc)) tc -= 0x20;
3143 } while (c && (TCHAR)c == tc);
3144 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
3145 }
3146 #endif
3147 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3148 vol = i; /* Drive number */
3149 *path = tt; /* Snip the drive prefix off */
3150 }
3151 return vol;
3152 }
3153 #if FF_STR_VOLUME_ID == 2 /* Unix style volume ID is enabled */
3154 if (*tp == '/') {
3155 i = 0;
3156 do {
3157 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */
3158 do { /* Compare the volume ID with path name */
3159 c = *sp++; tc = *(++tp);
3160 if (IsLower(c)) c -= 0x20;
3161 if (IsLower(tc)) tc -= 0x20;
3162 } while (c && (TCHAR)c == tc);
3163 } while ((c || (tc != '/' && (UINT)tc >= (FF_USE_LFN ? ' ' : '!'))) && ++i < FF_VOLUMES); /* Repeat for each ID until pattern match */
3164 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3165 vol = i; /* Drive number */
3166 *path = tp; /* Snip the drive prefix off */
3167 return vol;
3168 }
3169 }
3170 #endif
3171 /* No drive prefix is found */
3172 #if FF_FS_RPATH != 0
3173 vol = CurrVol; /* Default drive is current drive */
3174 #else
3175 vol = 0; /* Default drive is 0 */
3176 #endif
3177 return vol; /* Return the default drive */
3178 }
3179
3180
3181
3182
3183 /*-----------------------------------------------------------------------*/
3184 /* Load a sector and check if it is an FAT VBR */
3185 /*-----------------------------------------------------------------------*/
3186
3187 static BYTE check_fs ( /* 0:FAT, 1:exFAT, 2:Valid BS but not FAT, 3:Not a BS, 4:Disk error */
3188 FATFS* fs, /* Filesystem object */
3189 DWORD sect /* Sector# (lba) to load and check if it is an FAT-VBR or not */
3190 )
3191 {
3192 fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
3193 if (move_window(fs, sect) != FR_OK) return 4; /* Load boot record */
3194
3195 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot record signature (always here regardless of the sector size) */
3196
3197 #if FF_FS_EXFAT
3198 if (!mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */
3199 #endif
3200 if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) { /* Valid JumpBoot code? */
3201 if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */
3202 if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */
3203 }
3204 return 2; /* Valid BS but not FAT */
3205 }
3206
3207
3208
3209
3210 /*-----------------------------------------------------------------------*/
3211 /* Determine logical drive number and mount the volume if needed */
3212 /*-----------------------------------------------------------------------*/
3213
3214 static FRESULT find_volume ( /* FR_OK(0): successful, !=0: an error occurred */
3215 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
3216 FATFS** rfs, /* Pointer to pointer to the found filesystem object */
3217 BYTE mode /* !=0: Check write protection for write access */
3218 )
3219 {
3220 BYTE fmt, *pt;
3221 int vol;
3222 DSTATUS stat;
3223 DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
3224 WORD nrsv;
3225 FATFS *fs;
3226 UINT i;
3227
3228
3229 /* Get logical drive number */
3230 *rfs = 0;
3231 vol = get_ldnumber(path);
3232 if (vol < 0) return FR_INVALID_DRIVE;
3233
3234 /* Check if the filesystem object is valid or not */
3235 fs = FatFs[vol]; /* Get pointer to the filesystem object */
3236 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */
3237 #if FF_FS_REENTRANT
3238 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */
3239 #endif
3240 *rfs = fs; /* Return pointer to the filesystem object */
3241
3242 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
3243 if (fs->fs_type != 0) { /* If the volume has been mounted */
3244 stat = disk_status(fs->pdrv);
3245 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
3246 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
3247 return FR_WRITE_PROTECTED;
3248 }
3249 return FR_OK; /* The filesystem object is valid */
3250 }
3251 }
3252
3253 /* The filesystem object is not valid. */
3254 /* Following code attempts to mount the volume. (analyze BPB and initialize the filesystem object) */
3255
3256 fs->fs_type = 0; /* Clear the filesystem object */
3257 fs->pdrv = LD2PD(vol); /* Bind the logical drive and a physical drive */
3258 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */
3259 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
3260 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
3261 }
3262 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
3263 return FR_WRITE_PROTECTED;
3264 }
3265 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
3266 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
3267 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
3268 #endif
3269
3270 /* Find an FAT partition on the drive. Supports only generic partitioning rules, FDISK (MBR) and SFD (w/o partition). */
3271 bsect = 0;
3272 fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT-VBR as SFD */
3273 if (fmt == 2 || (fmt < 2 && LD2PT(vol) != 0)) { /* Not an FAT-VBR or forced partition number */
3274 for (i = 0; i < 4; i++) { /* Get partition offset */
3275 pt = fs->win + (MBR_Table + i * SZ_PTE);
3276 br[i] = pt[PTE_System] ? ld_dword(pt + PTE_StLba) : 0;
3277 }
3278 i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
3279 if (i != 0) i--;
3280 do { /* Find an FAT volume */
3281 bsect = br[i];
3282 fmt = bsect ? check_fs(fs, bsect) : 3; /* Check the partition */
3283 } while (LD2PT(vol) == 0 && fmt >= 2 && ++i < 4);
3284 }
3285 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
3286 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
3287
3288 /* An FAT volume is found (bsect). Following code initializes the filesystem object */
3289
3290 #if FF_FS_EXFAT
3291 if (fmt == 1) {
3292 QWORD maxlba;
3293 DWORD so, cv, bcl;
3294
3295 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
3296 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
3297
3298 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */
3299
3300 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
3301 return FR_NO_FILESYSTEM;
3302 }
3303
3304 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */
3305 if (maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */
3306
3307 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
3308
3309 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
3310 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
3311
3312 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
3313 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */
3314
3315 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
3316 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
3317 fs->n_fatent = nclst + 2;
3318
3319 /* Boundaries and Limits */
3320 fs->volbase = bsect;
3321 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
3322 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
3323 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */
3324 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
3325
3326 /* Get bitmap location and check if it is contiguous (implementation assumption) */
3327 so = i = 0;
3328 for (;;) { /* Find the bitmap entry in the root directory (in only first cluster) */
3329 if (i == 0) {
3330 if (so >= fs->csize) return FR_NO_FILESYSTEM; /* Not found? */
3331 if (move_window(fs, clst2sect(fs, fs->dirbase) + so) != FR_OK) return FR_DISK_ERR;
3332 so++;
3333 }
3334 if (fs->win[i] == ET_BITMAP) break; /* Is it a bitmap entry? */
3335 i = (i + SZDIRE) % SS(fs); /* Next entry */
3336 }
3337 bcl = ld_dword(fs->win + i + 20); /* Bitmap cluster */
3338 if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM;
3339 fs->bitbase = fs->database + fs->csize * (bcl - 2); /* Bitmap sector */
3340 for (;;) { /* Check if bitmap is contiguous */
3341 if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR;
3342 cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4);
3343 if (cv == 0xFFFFFFFF) break; /* Last link? */
3344 if (cv != ++bcl) return FR_NO_FILESYSTEM; /* Fragmented? */
3345 }
3346
3347 #if !FF_FS_READONLY
3348 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3349 #endif
3350 fmt = FS_EXFAT; /* FAT sub-type */
3351 } else
3352 #endif /* FF_FS_EXFAT */
3353 {
3354 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
3355
3356 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
3357 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
3358 fs->fsize = fasize;
3359
3360 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
3361 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
3362 fasize *= fs->n_fats; /* Number of sectors for FAT area */
3363
3364 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
3365 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
3366
3367 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
3368 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
3369
3370 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
3371 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
3372
3373 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
3374 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
3375
3376 /* Determine the FAT sub type */
3377 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + FF_DIR */
3378 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3379 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
3380 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3381 fmt = 0;
3382 if (nclst <= MAX_FAT32) fmt = FS_FAT32;
3383 if (nclst <= MAX_FAT16) fmt = FS_FAT16;
3384 if (nclst <= MAX_FAT12) fmt = FS_FAT12;
3385 if (fmt == 0) return FR_NO_FILESYSTEM;
3386
3387 /* Boundaries and Limits */
3388 fs->n_fatent = nclst + 2; /* Number of FAT entries */
3389 fs->volbase = bsect; /* Volume start sector */
3390 fs->fatbase = bsect + nrsv; /* FAT start sector */
3391 fs->database = bsect + sysect; /* Data start sector */
3392 if (fmt == FS_FAT32) {
3393 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
3394 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
3395 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
3396 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
3397 } else {
3398 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
3399 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
3400 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
3401 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
3402 }
3403 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
3404
3405 #if !FF_FS_READONLY
3406 /* Get FSInfo if available */
3407 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3408 fs->fsi_flag = 0x80;
3409 #if (FF_FS_NOFSINFO & 3) != 3
3410 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */
3411 && ld_word(fs->win + BPB_FSInfo32) == 1
3412 && move_window(fs, bsect + 1) == FR_OK)
3413 {
3414 fs->fsi_flag = 0;
3415 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */
3416 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252
3417 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272)
3418 {
3419 #if (FF_FS_NOFSINFO & 1) == 0
3420 fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
3421 #endif
3422 #if (FF_FS_NOFSINFO & 2) == 0
3423 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
3424 #endif
3425 }
3426 }
3427 #endif /* (FF_FS_NOFSINFO & 3) != 3 */
3428 #endif /* !FF_FS_READONLY */
3429 }
3430
3431 fs->fs_type = fmt; /* FAT sub-type */
3432 fs->id = ++Fsid; /* Volume mount ID */
3433 #if FF_USE_LFN == 1
3434 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
3435 #if FF_FS_EXFAT
3436 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */
3437 #endif
3438 #endif
3439 #if FF_FS_RPATH != 0
3440 fs->cdir = 0; /* Initialize current directory */
3441 #endif
3442 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */
3443 clear_lock(fs);
3444 #endif
3445 return FR_OK;
3446 }
3447
3448
3449
3450
3451 /*-----------------------------------------------------------------------*/
3452 /* Check if the file/directory object is valid or not */
3453 /*-----------------------------------------------------------------------*/
3454
3455 static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
3456 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/FF_DIR object, to check validity */
3457 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */
3458 )
3459 {
3460 FRESULT res = FR_INVALID_OBJECT;
3461
3462
3463 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */
3464 #if FF_FS_REENTRANT
3465 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */
3466 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3467 res = FR_OK;
3468 } else {
3469 unlock_fs(obj->fs, FR_OK);
3470 }
3471 } else {
3472 res = FR_TIMEOUT;
3473 }
3474 #else
3475 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3476 res = FR_OK;
3477 }
3478 #endif
3479 }
3480 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */
3481 return res;
3482 }
3483
3484
3485
3486
3487 /*---------------------------------------------------------------------------
3488
3489 Public Functions (FatFs API)
3490
3491 ----------------------------------------------------------------------------*/
3492
3493
3494
3495 /*-----------------------------------------------------------------------*/
3496 /* Mount/Unmount a Logical Drive */
3497 /*-----------------------------------------------------------------------*/
3498
3499 FRESULT f_mount (
3500 FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/
3501 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
3502 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */
3503 )
3504 {
3505 FATFS *cfs;
3506 int vol;
3507 FRESULT res;
3508 const TCHAR *rp = path;
3509
3510
3511 /* Get logical drive number */
3512 vol = get_ldnumber(&rp);
3513 if (vol < 0) return FR_INVALID_DRIVE;
3514 cfs = FatFs[vol]; /* Pointer to fs object */
3515
3516 if (cfs) {
3517 #if FF_FS_LOCK != 0
3518 clear_lock(cfs);
3519 #endif
3520 #if FF_FS_REENTRANT /* Discard sync object of the current volume */
3521 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
3522 #endif
3523 cfs->fs_type = 0; /* Clear old fs object */
3524 }
3525
3526 if (fs) {
3527 fs->fs_type = 0; /* Clear new fs object */
3528 #if FF_FS_REENTRANT /* Create sync object for the new volume */
3529 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
3530 #endif
3531 }
3532 FatFs[vol] = fs; /* Register new fs object */
3533
3534 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */
3535
3536 res = find_volume(&path, &fs, 0); /* Force mounted the volume */
3537 LEAVE_FF(fs, res);
3538 }
3539
3540
3541
3542
3543 /*-----------------------------------------------------------------------*/
3544 /* Open or Create a File */
3545 /*-----------------------------------------------------------------------*/
3546
3547 FRESULT f_open (
3548 FIL* fp, /* Pointer to the blank file object */
3549 const TCHAR* path, /* Pointer to the file name */
3550 BYTE mode /* Access mode and file open mode flags */
3551 )
3552 {
3553 FRESULT res;
3554 FF_DIR dj;
3555 FATFS *fs;
3556 #if !FF_FS_READONLY
3557 DWORD dw, cl, bcs, clst, sc;
3558 FSIZE_t ofs;
3559 #endif
3560 DEF_NAMBUF
3561
3562
3563 if (!fp) return FR_INVALID_OBJECT;
3564
3565 /* Get logical drive number */
3566 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND;
3567 res = find_volume(&path, &fs, mode);
3568 if (res == FR_OK) {
3569 dj.obj.fs = fs;
3570 INIT_NAMBUF(fs);
3571 res = follow_path(&dj, path); /* Follow the file path */
3572 #if !FF_FS_READONLY /* Read/Write configuration */
3573 if (res == FR_OK) {
3574 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3575 res = FR_INVALID_NAME;
3576 }
3577 #if FF_FS_LOCK != 0
3578 else {
3579 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */
3580 }
3581 #endif
3582 }
3583 /* Create or Open a file */
3584 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
3585 if (res != FR_OK) { /* No file, create new */
3586 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */
3587 #if FF_FS_LOCK != 0
3588 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
3589 #else
3590 res = dir_register(&dj);
3591 #endif
3592 }
3593 mode |= FA_CREATE_ALWAYS; /* File is created */
3594 }
3595 else { /* Any object with the same name is already existing */
3596 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or FF_DIR) */
3597 res = FR_DENIED;
3598 } else {
3599 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
3600 }
3601 }
3602 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */
3603 #if FF_FS_EXFAT
3604 if (fs->fs_type == FS_EXFAT) {
3605 /* Get current allocation info */
3606 fp->obj.fs = fs;
3607 init_alloc_info(fs, &fp->obj);
3608 /* Set directory entry block initial state */
3609 mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */
3610 mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */
3611 fs->dirbuf[XDIR_Attr] = AM_ARC;
3612 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());
3613 fs->dirbuf[XDIR_GenFlags] = 1;
3614 res = store_xdir(&dj);
3615 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */
3616 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
3617 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */
3618 }
3619 } else
3620 #endif
3621 {
3622 /* Set directory entry initial state */
3623 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */
3624 st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */
3625 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
3626 st_clust(fs, dj.dir, 0); /* Reset file allocation info */
3627 st_dword(dj.dir + DIR_FileSize, 0);
3628 fs->wflag = 1;
3629 if (cl != 0) { /* Remove the cluster chain if exist */
3630 dw = fs->winsect;
3631 res = remove_chain(&dj.obj, cl, 0);
3632 if (res == FR_OK) {
3633 res = move_window(fs, dw);
3634 fs->last_clst = cl - 1; /* Reuse the cluster hole */
3635 }
3636 }
3637 }
3638 }
3639 }
3640 else { /* Open an existing file */
3641 if (res == FR_OK) { /* Is the object exsiting? */
3642 if (dj.obj.attr & AM_DIR) { /* File open against a directory */
3643 res = FR_NO_FILE;
3644 } else {
3645 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */
3646 res = FR_DENIED;
3647 }
3648 }
3649 }
3650 }
3651 if (res == FR_OK) {
3652 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */
3653 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
3654 fp->dir_ptr = dj.dir;
3655 #if FF_FS_LOCK != 0
3656 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */
3657 if (fp->obj.lockid == 0) res = FR_INT_ERR;
3658 #endif
3659 }
3660 #else /* R/O configuration */
3661 if (res == FR_OK) {
3662 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */
3663 res = FR_INVALID_NAME;
3664 } else {
3665 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */
3666 res = FR_NO_FILE;
3667 }
3668 }
3669 }
3670 #endif
3671
3672 if (res == FR_OK) {
3673 #if FF_FS_EXFAT
3674 if (fs->fs_type == FS_EXFAT) {
3675 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */
3676 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3677 fp->obj.c_ofs = dj.blk_ofs;
3678 init_alloc_info(fs, &fp->obj);
3679 } else
3680 #endif
3681 {
3682 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */
3683 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
3684 }
3685 #if FF_USE_FASTSEEK
3686 fp->cltbl = 0; /* Disable fast seek mode */
3687 #endif
3688 fp->obj.fs = fs; /* Validate the file object */
3689 fp->obj.id = fs->id;
3690 fp->flag = mode; /* Set file access mode */
3691 fp->err = 0; /* Clear error flag */
3692 fp->sect = 0; /* Invalidate current data sector */
3693 fp->fptr = 0; /* Set file pointer top of the file */
3694 #if !FF_FS_READONLY
3695 #if !FF_FS_TINY
3696 mem_set(fp->buf, 0, sizeof fp->buf); /* Clear sector buffer */
3697 #endif
3698 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
3699 fp->fptr = fp->obj.objsize; /* Offset to seek */
3700 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
3701 clst = fp->obj.sclust; /* Follow the cluster chain */
3702 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
3703 clst = get_fat(&fp->obj, clst);
3704 if (clst <= 1) res = FR_INT_ERR;
3705 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
3706 }
3707 fp->clust = clst;
3708 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
3709 if ((sc = clst2sect(fs, clst)) == 0) {
3710 res = FR_INT_ERR;
3711 } else {
3712 fp->sect = sc + (DWORD)(ofs / SS(fs));
3713 #if !FF_FS_TINY
3714 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
3715 #endif
3716 }
3717 }
3718 }
3719 #endif
3720 }
3721
3722 FREE_NAMBUF();
3723 }
3724
3725 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
3726
3727 LEAVE_FF(fs, res);
3728 }
3729
3730
3731
3732
3733 /*-----------------------------------------------------------------------*/
3734 /* Read File */
3735 /*-----------------------------------------------------------------------*/
3736
3737 FRESULT f_read (
3738 FIL* fp, /* Pointer to the file object */
3739 void* buff, /* Pointer to data buffer */
3740 UINT btr, /* Number of bytes to read */
3741 UINT* br /* Pointer to number of bytes read */
3742 )
3743 {
3744 FRESULT res;
3745 FATFS *fs;
3746 DWORD clst, sect;
3747 FSIZE_t remain;
3748 UINT rcnt, cc, csect;
3749 BYTE *rbuff = (BYTE*)buff;
3750
3751
3752 *br = 0; /* Clear read byte counter */
3753 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3754 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3755 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3756 remain = fp->obj.objsize - fp->fptr;
3757 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3758
3759 for ( ; btr; /* Repeat until btr bytes read */
3760 btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) {
3761 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3762 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
3763 if (csect == 0) { /* On the cluster boundary? */
3764 if (fp->fptr == 0) { /* On the top of the file? */
3765 clst = fp->obj.sclust; /* Follow cluster chain from the origin */
3766 } else { /* Middle or end of the file */
3767 #if FF_USE_FASTSEEK
3768 if (fp->cltbl) {
3769 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3770 } else
3771 #endif
3772 {
3773 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
3774 }
3775 }
3776 if (clst < 2) ABORT(fs, FR_INT_ERR);
3777 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3778 fp->clust = clst; /* Update current cluster */
3779 }
3780 sect = clst2sect(fs, fp->clust); /* Get current sector */
3781 if (sect == 0) ABORT(fs, FR_INT_ERR);
3782 sect += csect;
3783 cc = btr / SS(fs); /* When remaining bytes >= sector size, */
3784 if (cc > 0) { /* Read maximum contiguous sectors directly */
3785 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3786 cc = fs->csize - csect;
3787 }
3788 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3789 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
3790 #if FF_FS_TINY
3791 if (fs->wflag && fs->winsect - sect < cc) {
3792 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
3793 }
3794 #else
3795 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
3796 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
3797 }
3798 #endif
3799 #endif
3800 rcnt = SS(fs) * cc; /* Number of bytes transferred */
3801 continue;
3802 }
3803 #if !FF_FS_TINY
3804 if (fp->sect != sect) { /* Load data sector if not in cache */
3805 #if !FF_FS_READONLY
3806 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3807 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3808 fp->flag &= (BYTE)~FA_DIRTY;
3809 }
3810 #endif
3811 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
3812 }
3813 #endif
3814 fp->sect = sect;
3815 }
3816 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
3817 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
3818 #if FF_FS_TINY
3819 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3820 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3821 #else
3822 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3823 #endif
3824 }
3825
3826 LEAVE_FF(fs, FR_OK);
3827 }
3828
3829
3830
3831
3832 #if !FF_FS_READONLY
3833 /*-----------------------------------------------------------------------*/
3834 /* Write File */
3835 /*-----------------------------------------------------------------------*/
3836
3837 FRESULT f_write (
3838 FIL* fp, /* Pointer to the file object */
3839 const void* buff, /* Pointer to the data to be written */
3840 UINT btw, /* Number of bytes to write */
3841 UINT* bw /* Pointer to number of bytes written */
3842 )
3843 {
3844 FRESULT res;
3845 FATFS *fs;
3846 DWORD clst, sect;
3847 UINT wcnt, cc, csect;
3848 const BYTE *wbuff = (const BYTE*)buff;
3849
3850
3851 *bw = 0; /* Clear write byte counter */
3852 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3853 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3854 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3855
3856 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */
3857 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
3858 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
3859 }
3860
3861 for ( ; btw; /* Repeat until all data written */
3862 btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) {
3863 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3864 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
3865 if (csect == 0) { /* On the cluster boundary? */
3866 if (fp->fptr == 0) { /* On the top of the file? */
3867 clst = fp->obj.sclust; /* Follow from the origin */
3868 if (clst == 0) { /* If no cluster is allocated, */
3869 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
3870 }
3871 } else { /* On the middle or end of the file */
3872 #if FF_USE_FASTSEEK
3873 if (fp->cltbl) {
3874 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3875 } else
3876 #endif
3877 {
3878 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
3879 }
3880 }
3881 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
3882 if (clst == 1) ABORT(fs, FR_INT_ERR);
3883 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3884 fp->clust = clst; /* Update current cluster */
3885 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
3886 }
3887 #if FF_FS_TINY
3888 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
3889 #else
3890 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
3891 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3892 fp->flag &= (BYTE)~FA_DIRTY;
3893 }
3894 #endif
3895 sect = clst2sect(fs, fp->clust); /* Get current sector */
3896 if (sect == 0) ABORT(fs, FR_INT_ERR);
3897 sect += csect;
3898 cc = btw / SS(fs); /* When remaining bytes >= sector size, */
3899 if (cc > 0) { /* Write maximum contiguous sectors directly */
3900 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3901 cc = fs->csize - csect;
3902 }
3903 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3904 #if FF_FS_MINIMIZE <= 2
3905 #if FF_FS_TINY
3906 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
3907 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
3908 fs->wflag = 0;
3909 }
3910 #else
3911 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
3912 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
3913 fp->flag &= (BYTE)~FA_DIRTY;
3914 }
3915 #endif
3916 #endif
3917 wcnt = SS(fs) * cc; /* Number of bytes transferred */
3918 continue;
3919 }
3920 #if FF_FS_TINY
3921 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
3922 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
3923 fs->winsect = sect;
3924 }
3925 #else
3926 if (fp->sect != sect && /* Fill sector cache with file data */
3927 fp->fptr < fp->obj.objsize &&
3928 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {
3929 ABORT(fs, FR_DISK_ERR);
3930 }
3931 #endif
3932 fp->sect = sect;
3933 }
3934 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
3935 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
3936 #if FF_FS_TINY
3937 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3938 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
3939 fs->wflag = 1;
3940 #else
3941 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
3942 fp->flag |= FA_DIRTY;
3943 #endif
3944 }
3945
3946 fp->flag |= FA_MODIFIED; /* Set file change flag */
3947
3948 LEAVE_FF(fs, FR_OK);
3949 }
3950
3951
3952
3953
3954 /*-----------------------------------------------------------------------*/
3955 /* Synchronize the File */
3956 /*-----------------------------------------------------------------------*/
3957
3958 FRESULT f_sync (
3959 FIL* fp /* Pointer to the file object */
3960 )
3961 {
3962 FRESULT res;
3963 FATFS *fs;
3964 DWORD tm;
3965 BYTE *dir;
3966
3967
3968 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3969 if (res == FR_OK) {
3970 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
3971 #if !FF_FS_TINY
3972 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
3973 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
3974 fp->flag &= (BYTE)~FA_DIRTY;
3975 }
3976 #endif
3977 /* Update the directory entry */
3978 tm = GET_FATTIME(); /* Modified time */
3979 #if FF_FS_EXFAT
3980 if (fs->fs_type == FS_EXFAT) {
3981 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */
3982 if (res == FR_OK) {
3983 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
3984 }
3985 if (res == FR_OK) {
3986 FF_DIR dj;
3987 DEF_NAMBUF
3988
3989 INIT_NAMBUF(fs);
3990 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */
3991 if (res == FR_OK) {
3992 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
3993 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */
3994 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust);
3995 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize);
3996 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize);
3997 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
3998 fs->dirbuf[XDIR_ModTime10] = 0;
3999 st_dword(fs->dirbuf + XDIR_AccTime, 0);
4000 res = store_xdir(&dj); /* Restore it to the directory */
4001 if (res == FR_OK) {
4002 res = sync_fs(fs);
4003 fp->flag &= (BYTE)~FA_MODIFIED;
4004 }
4005 }
4006 FREE_NAMBUF();
4007 }
4008 } else
4009 #endif
4010 {
4011 res = move_window(fs, fp->dir_sect);
4012 if (res == FR_OK) {
4013 dir = fp->dir_ptr;
4014 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4015 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */
4016 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
4017 st_dword(dir + DIR_ModTime, tm); /* Update modified time */
4018 st_word(dir + DIR_LstAccDate, 0);
4019 fs->wflag = 1;
4020 res = sync_fs(fs); /* Restore it to the directory */
4021 fp->flag &= (BYTE)~FA_MODIFIED;
4022 }
4023 }
4024 }
4025 }
4026
4027 LEAVE_FF(fs, res);
4028 }
4029
4030 #endif /* !FF_FS_READONLY */
4031
4032
4033
4034
4035 /*-----------------------------------------------------------------------*/
4036 /* Close File */
4037 /*-----------------------------------------------------------------------*/
4038
4039 FRESULT f_close (
4040 FIL* fp /* Pointer to the file object to be closed */
4041 )
4042 {
4043 FRESULT res;
4044 FATFS *fs;
4045
4046 #if !FF_FS_READONLY
4047 res = f_sync(fp); /* Flush cached data */
4048 if (res == FR_OK)
4049 #endif
4050 {
4051 res = validate(&fp->obj, &fs); /* Lock volume */
4052 if (res == FR_OK) {
4053 #if FF_FS_LOCK != 0
4054 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */
4055 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */
4056 #else
4057 fp->obj.fs = 0; /* Invalidate file object */
4058 #endif
4059 #if FF_FS_REENTRANT
4060 unlock_fs(fs, FR_OK); /* Unlock volume */
4061 #endif
4062 }
4063 }
4064 return res;
4065 }
4066
4067
4068
4069
4070 #if FF_FS_RPATH >= 1
4071 /*-----------------------------------------------------------------------*/
4072 /* Change Current Directory or Current Drive, Get Current Directory */
4073 /*-----------------------------------------------------------------------*/
4074
4075 FRESULT f_chdrive (
4076 const TCHAR* path /* Drive number to set */
4077 )
4078 {
4079 int vol;
4080
4081
4082 /* Get logical drive number */
4083 vol = get_ldnumber(&path);
4084 if (vol < 0) return FR_INVALID_DRIVE;
4085 CurrVol = (BYTE)vol; /* Set it as current volume */
4086
4087 return FR_OK;
4088 }
4089
4090
4091
4092 FRESULT f_chdir (
4093 const TCHAR* path /* Pointer to the directory path */
4094 )
4095 {
4096 #if FF_STR_VOLUME_ID == 2
4097 UINT i;
4098 #endif
4099 FRESULT res;
4100 FF_DIR dj;
4101 FATFS *fs;
4102 DEF_NAMBUF
4103
4104
4105 /* Get logical drive */
4106 res = find_volume(&path, &fs, 0);
4107 if (res == FR_OK) {
4108 dj.obj.fs = fs;
4109 INIT_NAMBUF(fs);
4110 res = follow_path(&dj, path); /* Follow the path */
4111 if (res == FR_OK) { /* Follow completed */
4112 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it the start directory itself? */
4113 fs->cdir = dj.obj.sclust;
4114 #if FF_FS_EXFAT
4115 if (fs->fs_type == FS_EXFAT) {
4116 fs->cdc_scl = dj.obj.c_scl;
4117 fs->cdc_size = dj.obj.c_size;
4118 fs->cdc_ofs = dj.obj.c_ofs;
4119 }
4120 #endif
4121 } else {
4122 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
4123 #if FF_FS_EXFAT
4124 if (fs->fs_type == FS_EXFAT) {
4125 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
4126 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
4127 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
4128 fs->cdc_ofs = dj.blk_ofs;
4129 } else
4130 #endif
4131 {
4132 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
4133 }
4134 } else {
4135 res = FR_NO_PATH; /* Reached but a file */
4136 }
4137 }
4138 }
4139 FREE_NAMBUF();
4140 if (res == FR_NO_FILE) res = FR_NO_PATH;
4141 #if FF_STR_VOLUME_ID == 2 /* Also current drive is changed at Unix style volume ID */
4142 if (res == FR_OK) {
4143 for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ; /* Set current drive */
4144 CurrVol = (BYTE)i;
4145 }
4146 #endif
4147 }
4148
4149 LEAVE_FF(fs, res);
4150 }
4151
4152
4153 #if FF_FS_RPATH >= 2
4154 FRESULT f_getcwd (
4155 TCHAR* buff, /* Pointer to the directory path */
4156 UINT len /* Size of buff in unit of TCHAR */
4157 )
4158 {
4159 FRESULT res;
4160 FF_DIR dj;
4161 FATFS *fs;
4162 UINT i, n;
4163 DWORD ccl;
4164 TCHAR *tp = buff;
4165 #if FF_VOLUMES >= 2
4166 UINT vl;
4167 #if FF_STR_VOLUME_ID
4168 const char *vp;
4169 #endif
4170 #endif
4171 FILINFO fno;
4172 DEF_NAMBUF
4173
4174
4175 /* Get logical drive */
4176 buff[0] = 0; /* Set null string to get current volume */
4177 res = find_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
4178 if (res == FR_OK) {
4179 dj.obj.fs = fs;
4180 INIT_NAMBUF(fs);
4181
4182 /* Follow parent directories and create the path */
4183 i = len; /* Bottom of buffer (directory stack base) */
4184 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
4185 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
4186 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
4187 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
4188 if (res != FR_OK) break;
4189 res = move_window(fs, dj.sect);
4190 if (res != FR_OK) break;
4191 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
4192 res = dir_sdi(&dj, 0);
4193 if (res != FR_OK) break;
4194 do { /* Find the entry links to the child directory */
4195 res = DIR_READ_FILE(&dj);
4196 if (res != FR_OK) break;
4197 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
4198 res = dir_next(&dj, 0);
4199 } while (res == FR_OK);
4200 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
4201 if (res != FR_OK) break;
4202 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
4203 for (n = 0; fno.fname[n]; n++) ; /* Name length */
4204 if (i < n + 1) { /* Insufficient space to store the path name? */
4205 res = FR_NOT_ENOUGH_CORE; break;
4206 }
4207 while (n) buff[--i] = fno.fname[--n]; /* Stack the name */
4208 buff[--i] = '/';
4209 }
4210 }
4211 if (res == FR_OK) {
4212 if (i == len) buff[--i] = '/'; /* Is it the root-directory? */
4213 #if FF_VOLUMES >= 2 /* Put drive prefix */
4214 vl = 0;
4215 #if FF_STR_VOLUME_ID >= 1 /* String volume ID */
4216 for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ;
4217 if (i >= n + 2) {
4218 if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/';
4219 for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ;
4220 if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':';
4221 vl++;
4222 }
4223 #else /* Numeric volume ID */
4224 if (i >= 3) {
4225 *tp++ = (TCHAR)'0' + CurrVol;
4226 *tp++ = (TCHAR)':';
4227 vl = 2;
4228 }
4229 #endif
4230 if (vl == 0) res = FR_NOT_ENOUGH_CORE;
4231 #endif
4232 /* Add current directory path */
4233 if (res == FR_OK) {
4234 do *tp++ = buff[i++]; while (i < len); /* Copy stacked path string */
4235 }
4236 }
4237 FREE_NAMBUF();
4238 }
4239
4240 *tp = 0;
4241 LEAVE_FF(fs, res);
4242 }
4243
4244 #endif /* FF_FS_RPATH >= 2 */
4245 #endif /* FF_FS_RPATH >= 1 */
4246
4247
4248
4249 #if FF_FS_MINIMIZE <= 2
4250 /*-----------------------------------------------------------------------*/
4251 /* Seek File Read/Write Pointer */
4252 /*-----------------------------------------------------------------------*/
4253
4254 FRESULT f_lseek (
4255 FIL* fp, /* Pointer to the file object */
4256 FSIZE_t ofs /* File pointer from top of file */
4257 )
4258 {
4259 FRESULT res;
4260 FATFS *fs;
4261 DWORD clst, bcs, nsect;
4262 FSIZE_t ifptr;
4263 #if FF_USE_FASTSEEK
4264 DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
4265 #endif
4266
4267 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4268 if (res == FR_OK) res = (FRESULT)fp->err;
4269 #if FF_FS_EXFAT && !FF_FS_READONLY
4270 if (res == FR_OK && fs->fs_type == FS_EXFAT) {
4271 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4272 }
4273 #endif
4274 if (res != FR_OK) LEAVE_FF(fs, res);
4275
4276 #if FF_USE_FASTSEEK
4277 if (fp->cltbl) { /* Fast seek */
4278 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
4279 tbl = fp->cltbl;
4280 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
4281 cl = fp->obj.sclust; /* Origin of the chain */
4282 if (cl != 0) {
4283 do {
4284 /* Get a fragment */
4285 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
4286 do {
4287 pcl = cl; ncl++;
4288 cl = get_fat(&fp->obj, cl);
4289 if (cl <= 1) ABORT(fs, FR_INT_ERR);
4290 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4291 } while (cl == pcl + 1);
4292 if (ulen <= tlen) { /* Store the length and top of the fragment */
4293 *tbl++ = ncl; *tbl++ = tcl;
4294 }
4295 } while (cl < fs->n_fatent); /* Repeat until end of chain */
4296 }
4297 *fp->cltbl = ulen; /* Number of items used */
4298 if (ulen <= tlen) {
4299 *tbl = 0; /* Terminate table */
4300 } else {
4301 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
4302 }
4303 } else { /* Fast seek */
4304 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
4305 fp->fptr = ofs; /* Set file pointer */
4306 if (ofs > 0) {
4307 fp->clust = clmt_clust(fp, ofs - 1);
4308 dsc = clst2sect(fs, fp->clust);
4309 if (dsc == 0) ABORT(fs, FR_INT_ERR);
4310 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
4311 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
4312 #if !FF_FS_TINY
4313 #if !FF_FS_READONLY
4314 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4315 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4316 fp->flag &= (BYTE)~FA_DIRTY;
4317 }
4318 #endif
4319 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
4320 #endif
4321 fp->sect = dsc;
4322 }
4323 }
4324 }
4325 } else
4326 #endif
4327
4328 /* Normal Seek */
4329 {
4330 #if FF_FS_EXFAT
4331 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */
4332 #endif
4333 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
4334 ofs = fp->obj.objsize;
4335 }
4336 ifptr = fp->fptr;
4337 fp->fptr = nsect = 0;
4338 if (ofs > 0) {
4339 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
4340 if (ifptr > 0 &&
4341 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
4342 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
4343 ofs -= fp->fptr;
4344 clst = fp->clust;
4345 } else { /* When seek to back cluster, */
4346 clst = fp->obj.sclust; /* start from the first cluster */
4347 #if !FF_FS_READONLY
4348 if (clst == 0) { /* If no cluster chain, create a new chain */
4349 clst = create_chain(&fp->obj, 0);
4350 if (clst == 1) ABORT(fs, FR_INT_ERR);
4351 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4352 fp->obj.sclust = clst;
4353 }
4354 #endif
4355 fp->clust = clst;
4356 }
4357 if (clst != 0) {
4358 while (ofs > bcs) { /* Cluster following loop */
4359 ofs -= bcs; fp->fptr += bcs;
4360 #if !FF_FS_READONLY
4361 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
4362 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
4363 fp->obj.objsize = fp->fptr;
4364 fp->flag |= FA_MODIFIED;
4365 }
4366 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
4367 if (clst == 0) { /* Clip file size in case of disk full */
4368 ofs = 0; break;
4369 }
4370 } else
4371 #endif
4372 {
4373 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
4374 }
4375 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4376 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
4377 fp->clust = clst;
4378 }
4379 fp->fptr += ofs;
4380 if (ofs % SS(fs)) {
4381 nsect = clst2sect(fs, clst); /* Current sector */
4382 if (nsect == 0) ABORT(fs, FR_INT_ERR);
4383 nsect += (DWORD)(ofs / SS(fs));
4384 }
4385 }
4386 }
4387 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
4388 fp->obj.objsize = fp->fptr;
4389 fp->flag |= FA_MODIFIED;
4390 }
4391 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
4392 #if !FF_FS_TINY
4393 #if !FF_FS_READONLY
4394 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4395 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4396 fp->flag &= (BYTE)~FA_DIRTY;
4397 }
4398 #endif
4399 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4400 #endif
4401 fp->sect = nsect;
4402 }
4403 }
4404
4405 LEAVE_FF(fs, res);
4406 }
4407
4408
4409
4410 #if FF_FS_MINIMIZE <= 1
4411 /*-----------------------------------------------------------------------*/
4412 /* Create a Directory Object */
4413 /*-----------------------------------------------------------------------*/
4414
4415 FRESULT f_opendir (
4416 FF_DIR* dp, /* Pointer to directory object to create */
4417 const TCHAR* path /* Pointer to the directory path */
4418 )
4419 {
4420 FRESULT res;
4421 FATFS *fs;
4422 DEF_NAMBUF
4423
4424
4425 if (!dp) return FR_INVALID_OBJECT;
4426
4427 /* Get logical drive */
4428 res = find_volume(&path, &fs, 0);
4429 if (res == FR_OK) {
4430 dp->obj.fs = fs;
4431 INIT_NAMBUF(fs);
4432 res = follow_path(dp, path); /* Follow the path to the directory */
4433 if (res == FR_OK) { /* Follow completed */
4434 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
4435 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */
4436 #if FF_FS_EXFAT
4437 if (fs->fs_type == FS_EXFAT) {
4438 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */
4439 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
4440 dp->obj.c_ofs = dp->blk_ofs;
4441 init_alloc_info(fs, &dp->obj); /* Get object allocation info */
4442 } else
4443 #endif
4444 {
4445 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */
4446 }
4447 } else { /* This object is a file */
4448 res = FR_NO_PATH;
4449 }
4450 }
4451 if (res == FR_OK) {
4452 dp->obj.id = fs->id;
4453 res = dir_sdi(dp, 0); /* Rewind directory */
4454 #if FF_FS_LOCK != 0
4455 if (res == FR_OK) {
4456 if (dp->obj.sclust != 0) {
4457 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */
4458 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;
4459 } else {
4460 dp->obj.lockid = 0; /* Root directory need not to be locked */
4461 }
4462 }
4463 #endif
4464 }
4465 }
4466 FREE_NAMBUF();
4467 if (res == FR_NO_FILE) res = FR_NO_PATH;
4468 }
4469 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */
4470
4471 LEAVE_FF(fs, res);
4472 }
4473
4474
4475
4476
4477 /*-----------------------------------------------------------------------*/
4478 /* Close Directory */
4479 /*-----------------------------------------------------------------------*/
4480
4481 FRESULT f_closedir (
4482 FF_DIR *dp /* Pointer to the directory object to be closed */
4483 )
4484 {
4485 FRESULT res;
4486 FATFS *fs;
4487
4488
4489 res = validate(&dp->obj, &fs); /* Check validity of the file object */
4490 if (res == FR_OK) {
4491 #if FF_FS_LOCK != 0
4492 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */
4493 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */
4494 #else
4495 dp->obj.fs = 0; /* Invalidate directory object */
4496 #endif
4497 #if FF_FS_REENTRANT
4498 unlock_fs(fs, FR_OK); /* Unlock volume */
4499 #endif
4500 }
4501 return res;
4502 }
4503
4504
4505
4506
4507 /*-----------------------------------------------------------------------*/
4508 /* Read Directory Entries in Sequence */
4509 /*-----------------------------------------------------------------------*/
4510
4511 FRESULT f_readdir (
4512 FF_DIR* dp, /* Pointer to the open directory object */
4513 FILINFO* fno /* Pointer to file information to return */
4514 )
4515 {
4516 FRESULT res;
4517 FATFS *fs;
4518 DEF_NAMBUF
4519
4520
4521 res = validate(&dp->obj, &fs); /* Check validity of the directory object */
4522 if (res == FR_OK) {
4523 if (!fno) {
4524 res = dir_sdi(dp, 0); /* Rewind the directory object */
4525 } else {
4526 INIT_NAMBUF(fs);
4527 res = DIR_READ_FILE(dp); /* Read an item */
4528 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
4529 if (res == FR_OK) { /* A valid entry is found */
4530 get_fileinfo(dp, fno); /* Get the object information */
4531 res = dir_next(dp, 0); /* Increment index for next */
4532 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
4533 }
4534 FREE_NAMBUF();
4535 }
4536 }
4537 LEAVE_FF(fs, res);
4538 }
4539
4540
4541
4542 #if FF_USE_FIND
4543 /*-----------------------------------------------------------------------*/
4544 /* Find Next File */
4545 /*-----------------------------------------------------------------------*/
4546
4547 FRESULT f_findnext (
4548 FF_DIR* dp, /* Pointer to the open directory object */
4549 FILINFO* fno /* Pointer to the file information structure */
4550 )
4551 {
4552 FRESULT res;
4553
4554
4555 for (;;) {
4556 res = f_readdir(dp, fno); /* Get a directory item */
4557 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
4558 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */
4559 #if FF_USE_LFN && FF_USE_FIND == 2
4560 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */
4561 #endif
4562 }
4563 return res;
4564 }
4565
4566
4567
4568 /*-----------------------------------------------------------------------*/
4569 /* Find First File */
4570 /*-----------------------------------------------------------------------*/
4571
4572 FRESULT f_findfirst (
4573 FF_DIR* dp, /* Pointer to the blank directory object */
4574 FILINFO* fno, /* Pointer to the file information structure */
4575 const TCHAR* path, /* Pointer to the directory to open */
4576 const TCHAR* pattern /* Pointer to the matching pattern */
4577 )
4578 {
4579 FRESULT res;
4580
4581
4582 dp->pat = pattern; /* Save pointer to pattern string */
4583 res = f_opendir(dp, path); /* Open the target directory */
4584 if (res == FR_OK) {
4585 res = f_findnext(dp, fno); /* Find the first item */
4586 }
4587 return res;
4588 }
4589
4590 #endif /* FF_USE_FIND */
4591
4592
4593
4594 #if FF_FS_MINIMIZE == 0
4595 /*-----------------------------------------------------------------------*/
4596 /* Get File Status */
4597 /*-----------------------------------------------------------------------*/
4598
4599 FRESULT f_stat (
4600 const TCHAR* path, /* Pointer to the file path */
4601 FILINFO* fno /* Pointer to file information to return */
4602 )
4603 {
4604 FRESULT res;
4605 FF_DIR dj;
4606 DEF_NAMBUF
4607
4608
4609 /* Get logical drive */
4610 res = find_volume(&path, &dj.obj.fs, 0);
4611 if (res == FR_OK) {
4612 INIT_NAMBUF(dj.obj.fs);
4613 res = follow_path(&dj, path); /* Follow the file path */
4614 if (res == FR_OK) { /* Follow completed */
4615 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
4616 res = FR_INVALID_NAME;
4617 } else { /* Found an object */
4618 if (fno) get_fileinfo(&dj, fno);
4619 }
4620 }
4621 FREE_NAMBUF();
4622 }
4623
4624 LEAVE_FF(dj.obj.fs, res);
4625 }
4626
4627
4628
4629 #if !FF_FS_READONLY
4630 /*-----------------------------------------------------------------------*/
4631 /* Get Number of Free Clusters */
4632 /*-----------------------------------------------------------------------*/
4633
4634 FRESULT f_getfree (
4635 const TCHAR* path, /* Logical drive number */
4636 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
4637 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */
4638 )
4639 {
4640 FRESULT res;
4641 FATFS *fs;
4642 DWORD nfree, clst, sect, stat;
4643 UINT i;
4644 FFOBJID obj;
4645
4646
4647 /* Get logical drive */
4648 res = find_volume(&path, &fs, 0);
4649 if (res == FR_OK) {
4650 *fatfs = fs; /* Return ptr to the fs object */
4651 /* If free_clst is valid, return it without full FAT scan */
4652 if (fs->free_clst <= fs->n_fatent - 2) {
4653 *nclst = fs->free_clst;
4654 } else {
4655 /* Scan FAT to obtain number of free clusters */
4656 nfree = 0;
4657 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */
4658 clst = 2; obj.fs = fs;
4659 do {
4660 stat = get_fat(&obj, clst);
4661 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
4662 if (stat == 1) { res = FR_INT_ERR; break; }
4663 if (stat == 0) nfree++;
4664 } while (++clst < fs->n_fatent);
4665 } else {
4666 #if FF_FS_EXFAT
4667 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */
4668 BYTE bm;
4669 UINT b;
4670
4671 clst = fs->n_fatent - 2; /* Number of clusters */
4672 sect = fs->bitbase; /* Bitmap sector */
4673 i = 0; /* Offset in the sector */
4674 do { /* Counts numbuer of bits with zero in the bitmap */
4675 if (i == 0) {
4676 res = move_window(fs, sect++);
4677 if (res != FR_OK) break;
4678 }
4679 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
4680 if (!(bm & 1)) nfree++;
4681 bm >>= 1;
4682 }
4683 i = (i + 1) % SS(fs);
4684 } while (clst);
4685 } else
4686 #endif
4687 { /* FAT16/32: Scan WORD/DWORD FAT entries */
4688 clst = fs->n_fatent; /* Number of entries */
4689 sect = fs->fatbase; /* Top of the FAT */
4690 i = 0; /* Offset in the sector */
4691 do { /* Counts numbuer of entries with zero in the FAT */
4692 if (i == 0) {
4693 res = move_window(fs, sect++);
4694 if (res != FR_OK) break;
4695 }
4696 if (fs->fs_type == FS_FAT16) {
4697 if (ld_word(fs->win + i) == 0) nfree++;
4698 i += 2;
4699 } else {
4700 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++;
4701 i += 4;
4702 }
4703 i %= SS(fs);
4704 } while (--clst);
4705 }
4706 }
4707 *nclst = nfree; /* Return the free clusters */
4708 fs->free_clst = nfree; /* Now free_clst is valid */
4709 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */
4710 }
4711 }
4712
4713 LEAVE_FF(fs, res);
4714 }
4715
4716
4717
4718
4719 /*-----------------------------------------------------------------------*/
4720 /* Truncate File */
4721 /*-----------------------------------------------------------------------*/
4722
4723 FRESULT f_truncate (
4724 FIL* fp /* Pointer to the file object */
4725 )
4726 {
4727 FRESULT res;
4728 FATFS *fs;
4729 DWORD ncl;
4730
4731
4732 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4733 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
4734 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4735
4736 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */
4737 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
4738 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
4739 fp->obj.sclust = 0;
4740 } else { /* When truncate a part of the file, remove remaining clusters */
4741 ncl = get_fat(&fp->obj, fp->clust);
4742 res = FR_OK;
4743 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
4744 if (ncl == 1) res = FR_INT_ERR;
4745 if (res == FR_OK && ncl < fs->n_fatent) {
4746 res = remove_chain(&fp->obj, ncl, fp->clust);
4747 }
4748 }
4749 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */
4750 fp->flag |= FA_MODIFIED;
4751 #if !FF_FS_TINY
4752 if (res == FR_OK && (fp->flag & FA_DIRTY)) {
4753 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {
4754 res = FR_DISK_ERR;
4755 } else {
4756 fp->flag &= (BYTE)~FA_DIRTY;
4757 }
4758 }
4759 #endif
4760 if (res != FR_OK) ABORT(fs, res);
4761 }
4762
4763 LEAVE_FF(fs, res);
4764 }
4765
4766
4767
4768
4769 /*-----------------------------------------------------------------------*/
4770 /* Delete a File/Directory */
4771 /*-----------------------------------------------------------------------*/
4772
4773 FRESULT f_unlink (
4774 const TCHAR* path /* Pointer to the file or directory path */
4775 )
4776 {
4777 FRESULT res;
4778 FF_DIR dj, sdj;
4779 DWORD dclst = 0;
4780 FATFS *fs;
4781 #if FF_FS_EXFAT
4782 FFOBJID obj;
4783 #endif
4784 DEF_NAMBUF
4785
4786
4787 /* Get logical drive */
4788 res = find_volume(&path, &fs, FA_WRITE);
4789 if (res == FR_OK) {
4790 dj.obj.fs = fs;
4791 INIT_NAMBUF(fs);
4792 res = follow_path(&dj, path); /* Follow the file path */
4793 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
4794 res = FR_INVALID_NAME; /* Cannot remove dot entry */
4795 }
4796 #if FF_FS_LOCK != 0
4797 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */
4798 #endif
4799 if (res == FR_OK) { /* The object is accessible */
4800 if (dj.fn[NSFLAG] & NS_NONAME) {
4801 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
4802 } else {
4803 if (dj.obj.attr & AM_RDO) {
4804 res = FR_DENIED; /* Cannot remove R/O object */
4805 }
4806 }
4807 if (res == FR_OK) {
4808 #if FF_FS_EXFAT
4809 obj.fs = fs;
4810 if (fs->fs_type == FS_EXFAT) {
4811 init_alloc_info(fs, &obj);
4812 dclst = obj.sclust;
4813 } else
4814 #endif
4815 {
4816 dclst = ld_clust(fs, dj.dir);
4817 }
4818 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */
4819 #if FF_FS_RPATH != 0
4820 if (dclst == fs->cdir) { /* Is it the current directory? */
4821 res = FR_DENIED;
4822 } else
4823 #endif
4824 {
4825 sdj.obj.fs = fs; /* Open the sub-directory */
4826 sdj.obj.sclust = dclst;
4827 #if FF_FS_EXFAT
4828 if (fs->fs_type == FS_EXFAT) {
4829 sdj.obj.objsize = obj.objsize;
4830 sdj.obj.stat = obj.stat;
4831 }
4832 #endif
4833 res = dir_sdi(&sdj, 0);
4834 if (res == FR_OK) {
4835 res = DIR_READ_FILE(&sdj); /* Test if the directory is empty */
4836 if (res == FR_OK) res = FR_DENIED; /* Not empty? */
4837 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
4838 }
4839 }
4840 }
4841 }
4842 if (res == FR_OK) {
4843 res = dir_remove(&dj); /* Remove the directory entry */
4844 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */
4845 #if FF_FS_EXFAT
4846 res = remove_chain(&obj, dclst, 0);
4847 #else
4848 res = remove_chain(&dj.obj, dclst, 0);
4849 #endif
4850 }
4851 if (res == FR_OK) res = sync_fs(fs);
4852 }
4853 }
4854 FREE_NAMBUF();
4855 }
4856
4857 LEAVE_FF(fs, res);
4858 }
4859
4860
4861
4862
4863 /*-----------------------------------------------------------------------*/
4864 /* Create a Directory */
4865 /*-----------------------------------------------------------------------*/
4866
4867 FRESULT f_mkdir (
4868 const TCHAR* path /* Pointer to the directory path */
4869 )
4870 {
4871 FRESULT res;
4872 FF_DIR dj;
4873 FFOBJID sobj;
4874 FATFS *fs;
4875 DWORD dcl, pcl, tm;
4876 DEF_NAMBUF
4877
4878
4879 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
4880 if (res == FR_OK) {
4881 dj.obj.fs = fs;
4882 INIT_NAMBUF(fs);
4883 res = follow_path(&dj, path); /* Follow the file path */
4884 if (res == FR_OK) res = FR_EXIST; /* Name collision? */
4885 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { /* Invalid name? */
4886 res = FR_INVALID_NAME;
4887 }
4888 if (res == FR_NO_FILE) { /* It is clear to create a new directory */
4889 sobj.fs = fs; /* New object id to create a new chain */
4890 dcl = create_chain(&sobj, 0); /* Allocate a cluster for the new directory */
4891 res = FR_OK;
4892 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster? */
4893 if (dcl == 1) res = FR_INT_ERR; /* Any insanity? */
4894 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; /* Disk error? */
4895 tm = GET_FATTIME();
4896 if (res == FR_OK) {
4897 res = dir_clear(fs, dcl); /* Clean up the new table */
4898 if (res == FR_OK) {
4899 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* Create dot entries (FAT only) */
4900 mem_set(fs->win + DIR_Name, ' ', 11); /* Create "." entry */
4901 fs->win[DIR_Name] = '.';
4902 fs->win[DIR_Attr] = AM_DIR;
4903 st_dword(fs->win + DIR_ModTime, tm);
4904 st_clust(fs, fs->win, dcl);
4905 mem_cpy(fs->win + SZDIRE, fs->win, SZDIRE); /* Create ".." entry */
4906 fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
4907 st_clust(fs, fs->win + SZDIRE, pcl);
4908 fs->wflag = 1;
4909 }
4910 res = dir_register(&dj); /* Register the object to the parent directoy */
4911 }
4912 }
4913 if (res == FR_OK) {
4914 #if FF_FS_EXFAT
4915 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
4916 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
4917 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
4918 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs)); /* File size needs to be valid */
4919 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs));
4920 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */
4921 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
4922 res = store_xdir(&dj);
4923 } else
4924 #endif
4925 {
4926 st_dword(dj.dir + DIR_ModTime, tm); /* Created time */
4927 st_clust(fs, dj.dir, dcl); /* Table start cluster */
4928 dj.dir[DIR_Attr] = AM_DIR; /* Attribute */
4929 fs->wflag = 1;
4930 }
4931 if (res == FR_OK) {
4932 res = sync_fs(fs);
4933 }
4934 } else {
4935 remove_chain(&sobj, dcl, 0); /* Could not register, remove the allocated cluster */
4936 }
4937 }
4938 FREE_NAMBUF();
4939 }
4940
4941 LEAVE_FF(fs, res);
4942 }
4943
4944
4945
4946
4947 /*-----------------------------------------------------------------------*/
4948 /* Rename a File/Directory */
4949 /*-----------------------------------------------------------------------*/
4950
4951 FRESULT f_rename (
4952 const TCHAR* path_old, /* Pointer to the object name to be renamed */
4953 const TCHAR* path_new /* Pointer to the new name */
4954 )
4955 {
4956 FRESULT res;
4957 FF_DIR djo, djn;
4958 FATFS *fs;
4959 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;
4960 DWORD dw;
4961 DEF_NAMBUF
4962
4963
4964 get_ldnumber(&path_new); /* Snip the drive number of new name off */
4965 res = find_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
4966 if (res == FR_OK) {
4967 djo.obj.fs = fs;
4968 INIT_NAMBUF(fs);
4969 res = follow_path(&djo, path_old); /* Check old object */
4970 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
4971 #if FF_FS_LOCK != 0
4972 if (res == FR_OK) {
4973 res = chk_lock(&djo, 2);
4974 }
4975 #endif
4976 if (res == FR_OK) { /* Object to be renamed is found */
4977 #if FF_FS_EXFAT
4978 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */
4979 BYTE nf, nn;
4980 WORD nh;
4981
4982 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
4983 mem_cpy(&djn, &djo, sizeof djo);
4984 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
4985 if (res == FR_OK) { /* Is new name already in use by any other object? */
4986 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
4987 }
4988 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
4989 res = dir_register(&djn); /* Register the new entry */
4990 if (res == FR_OK) {
4991 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
4992 nh = ld_word(fs->dirbuf + XDIR_NameHash);
4993 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */
4994 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
4995 st_word(fs->dirbuf + XDIR_NameHash, nh);
4996 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
4997 /* Start of critical section where an interruption can cause a cross-link */
4998 res = store_xdir(&djn);
4999 }
5000 }
5001 } else
5002 #endif
5003 { /* At FAT/FAT32 volume */
5004 mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */
5005 mem_cpy(&djn, &djo, sizeof (FF_DIR)); /* Duplicate the directory object */
5006 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5007 if (res == FR_OK) { /* Is new name already in use by any other object? */
5008 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5009 }
5010 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5011 res = dir_register(&djn); /* Register the new entry */
5012 if (res == FR_OK) {
5013 dir = djn.dir; /* Copy directory entry of the object except name */
5014 mem_cpy(dir + 13, buf + 13, SZDIRE - 13);
5015 dir[DIR_Attr] = buf[DIR_Attr];
5016 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5017 fs->wflag = 1;
5018 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
5019 dw = clst2sect(fs, ld_clust(fs, dir));
5020 if (dw == 0) {
5021 res = FR_INT_ERR;
5022 } else {
5023 /* Start of critical section where an interruption can cause a cross-link */
5024 res = move_window(fs, dw);
5025 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */
5026 if (res == FR_OK && dir[1] == '.') {
5027 st_clust(fs, dir, djn.obj.sclust);
5028 fs->wflag = 1;
5029 }
5030 }
5031 }
5032 }
5033 }
5034 }
5035 if (res == FR_OK) {
5036 res = dir_remove(&djo); /* Remove old entry */
5037 if (res == FR_OK) {
5038 res = sync_fs(fs);
5039 }
5040 }
5041 /* End of the critical section */
5042 }
5043 FREE_NAMBUF();
5044 }
5045
5046 LEAVE_FF(fs, res);
5047 }
5048
5049 #endif /* !FF_FS_READONLY */
5050 #endif /* FF_FS_MINIMIZE == 0 */
5051 #endif /* FF_FS_MINIMIZE <= 1 */
5052 #endif /* FF_FS_MINIMIZE <= 2 */
5053
5054
5055
5056 #if FF_USE_CHMOD && !FF_FS_READONLY
5057 /*-----------------------------------------------------------------------*/
5058 /* Change Attribute */
5059 /*-----------------------------------------------------------------------*/
5060
5061 FRESULT f_chmod (
5062 const TCHAR* path, /* Pointer to the file path */
5063 BYTE attr, /* Attribute bits */
5064 BYTE mask /* Attribute mask to change */
5065 )
5066 {
5067 FRESULT res;
5068 FF_DIR dj;
5069 FATFS *fs;
5070 DEF_NAMBUF
5071
5072
5073 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5074 if (res == FR_OK) {
5075 dj.obj.fs = fs;
5076 INIT_NAMBUF(fs);
5077 res = follow_path(&dj, path); /* Follow the file path */
5078 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5079 if (res == FR_OK) {
5080 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
5081 #if FF_FS_EXFAT
5082 if (fs->fs_type == FS_EXFAT) {
5083 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5084 res = store_xdir(&dj);
5085 } else
5086 #endif
5087 {
5088 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5089 fs->wflag = 1;
5090 }
5091 if (res == FR_OK) {
5092 res = sync_fs(fs);
5093 }
5094 }
5095 FREE_NAMBUF();
5096 }
5097
5098 LEAVE_FF(fs, res);
5099 }
5100
5101
5102
5103
5104 /*-----------------------------------------------------------------------*/
5105 /* Change Timestamp */
5106 /*-----------------------------------------------------------------------*/
5107
5108 FRESULT f_utime (
5109 const TCHAR* path, /* Pointer to the file/directory name */
5110 const FILINFO* fno /* Pointer to the timestamp to be set */
5111 )
5112 {
5113 FRESULT res;
5114 FF_DIR dj;
5115 FATFS *fs;
5116 DEF_NAMBUF
5117
5118
5119 res = find_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5120 if (res == FR_OK) {
5121 dj.obj.fs = fs;
5122 INIT_NAMBUF(fs);
5123 res = follow_path(&dj, path); /* Follow the file path */
5124 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5125 if (res == FR_OK) {
5126 #if FF_FS_EXFAT
5127 if (fs->fs_type == FS_EXFAT) {
5128 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5129 res = store_xdir(&dj);
5130 } else
5131 #endif
5132 {
5133 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5134 fs->wflag = 1;
5135 }
5136 if (res == FR_OK) {
5137 res = sync_fs(fs);
5138 }
5139 }
5140 FREE_NAMBUF();
5141 }
5142
5143 LEAVE_FF(fs, res);
5144 }
5145
5146 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */
5147
5148
5149
5150 #if FF_USE_LABEL
5151 /*-----------------------------------------------------------------------*/
5152 /* Get Volume Label */
5153 /*-----------------------------------------------------------------------*/
5154
5155 FRESULT f_getlabel (
5156 const TCHAR* path, /* Logical drive number */
5157 TCHAR* label, /* Buffer to store the volume label */
5158 DWORD* vsn /* Variable to store the volume serial number */
5159 )
5160 {
5161 FRESULT res;
5162 FF_DIR dj;
5163 FATFS *fs;
5164 UINT si, di;
5165 WCHAR wc;
5166
5167 /* Get logical drive */
5168 res = find_volume(&path, &fs, 0);
5169
5170 /* Get volume label */
5171 if (res == FR_OK && label) {
5172 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5173 res = dir_sdi(&dj, 0);
5174 if (res == FR_OK) {
5175 res = DIR_READ_LABEL(&dj); /* Find a volume label entry */
5176 if (res == FR_OK) {
5177 #if FF_FS_EXFAT
5178 if (fs->fs_type == FS_EXFAT) {
5179 WCHAR hs;
5180
5181 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
5182 wc = ld_word(dj.dir + XDIR_Label + si * 2);
5183 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */
5184 hs = wc; continue;
5185 }
5186 wc = put_utf((DWORD)hs << 16 | wc, &label[di], 4);
5187 if (wc == 0) { di = 0; break; }
5188 di += wc;
5189 hs = 0;
5190 }
5191 if (hs != 0) di = 0; /* Broken surrogate pair? */
5192 label[di] = 0;
5193 } else
5194 #endif
5195 {
5196 si = di = 0; /* Extract volume label from AM_VOL entry */
5197 while (si < 11) {
5198 wc = dj.dir[si++];
5199 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */
5200 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */
5201 wc = ff_oem2uni(wc, CODEPAGE); /* Convert it into Unicode */
5202 if (wc != 0) wc = put_utf(wc, &label[di], 4); /* Put it in Unicode */
5203 if (wc == 0) { di = 0; break; }
5204 di += wc;
5205 #else /* ANSI/OEM output */
5206 label[di++] = (TCHAR)wc;
5207 #endif
5208 }
5209 do { /* Truncate trailing spaces */
5210 label[di] = 0;
5211 if (di == 0) break;
5212 } while (label[--di] == ' ');
5213 }
5214 }
5215 }
5216 if (res == FR_NO_FILE) { /* No label entry and return nul string */
5217 label[0] = 0;
5218 res = FR_OK;
5219 }
5220 }
5221
5222 /* Get volume serial number */
5223 if (res == FR_OK && vsn) {
5224 res = move_window(fs, fs->volbase);
5225 if (res == FR_OK) {
5226 switch (fs->fs_type) {
5227 case FS_EXFAT:
5228 di = BPB_VolIDEx; break;
5229
5230 case FS_FAT32:
5231 di = BS_VolID32; break;
5232
5233 default:
5234 di = BS_VolID;
5235 }
5236 *vsn = ld_dword(fs->win + di);
5237 }
5238 }
5239
5240 LEAVE_FF(fs, res);
5241 }
5242
5243
5244
5245 #if !FF_FS_READONLY
5246 /*-----------------------------------------------------------------------*/
5247 /* Set Volume Label */
5248 /*-----------------------------------------------------------------------*/
5249
5250 FRESULT f_setlabel (
5251 const TCHAR* label /* Volume label to set with heading logical drive number */
5252 )
5253 {
5254 FRESULT res;
5255 FF_DIR dj;
5256 FATFS *fs;
5257 BYTE dirvn[22];
5258 UINT di;
5259 WCHAR wc;
5260 static const char badchr[] = "+.,;=[]/\\\"*:<>\?|\x7F"; /* [0..] for FAT, [7..] for exFAT */
5261 #if FF_USE_LFN
5262 DWORD dc;
5263 #endif
5264
5265 /* Get logical drive */
5266 res = find_volume(&label, &fs, FA_WRITE);
5267 if (res != FR_OK) LEAVE_FF(fs, res);
5268
5269 #if FF_FS_EXFAT
5270 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
5271 mem_set(dirvn, 0, 22);
5272 di = 0;
5273 while ((UINT)*label >= ' ') { /* Create volume label */
5274 dc = tchar2uni(&label); /* Get a Unicode character */
5275 if (dc >= 0x10000) {
5276 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */
5277 dc = 0;
5278 } else {
5279 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++;
5280 }
5281 }
5282 if (dc == 0 || chk_chr(badchr + 7, (int)dc) || di >= 11) { /* Check validity of the volume label */
5283 LEAVE_FF(fs, FR_INVALID_NAME);
5284 }
5285 st_word(dirvn + di * 2, (WCHAR)dc); di++;
5286 }
5287 } else
5288 #endif
5289 { /* On the FAT/FAT32 volume */
5290 mem_set(dirvn, ' ', 11);
5291 di = 0;
5292 while ((UINT)*label >= ' ') { /* Create volume label */
5293 #if FF_USE_LFN
5294 dc = tchar2uni(&label);
5295 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0;
5296 #else /* ANSI/OEM input */
5297 wc = (BYTE)*label++;
5298 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0;
5299 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */
5300 #if FF_CODE_PAGE == 0
5301 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5302 #elif FF_CODE_PAGE < 900
5303 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5304 #endif
5305 #endif
5306 if (wc == 0 || chk_chr(badchr + 0, (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
5307 LEAVE_FF(fs, FR_INVALID_NAME);
5308 }
5309 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8);
5310 dirvn[di++] = (BYTE)wc;
5311 }
5312 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
5313 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */
5314 }
5315
5316 /* Set volume label */
5317 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5318 res = dir_sdi(&dj, 0);
5319 if (res == FR_OK) {
5320 res = DIR_READ_LABEL(&dj); /* Get volume label entry */
5321 if (res == FR_OK) {
5322 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5323 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */
5324 mem_cpy(dj.dir + XDIR_Label, dirvn, 22);
5325 } else {
5326 if (di != 0) {
5327 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */
5328 } else {
5329 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
5330 }
5331 }
5332 fs->wflag = 1;
5333 res = sync_fs(fs);
5334 } else { /* No volume label entry or an error */
5335 if (res == FR_NO_FILE) {
5336 res = FR_OK;
5337 if (di != 0) { /* Create a volume label entry */
5338 res = dir_alloc(&dj, 1); /* Allocate an entry */
5339 if (res == FR_OK) {
5340 mem_set(dj.dir, 0, SZDIRE); /* Clean the entry */
5341 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5342 dj.dir[XDIR_Type] = ET_VLABEL; /* Create volume label entry */
5343 dj.dir[XDIR_NumLabel] = (BYTE)di;
5344 mem_cpy(dj.dir + XDIR_Label, dirvn, 22);
5345 } else {
5346 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
5347 mem_cpy(dj.dir, dirvn, 11);
5348 }
5349 fs->wflag = 1;
5350 res = sync_fs(fs);
5351 }
5352 }
5353 }
5354 }
5355 }
5356
5357 LEAVE_FF(fs, res);
5358 }
5359
5360 #endif /* !FF_FS_READONLY */
5361 #endif /* FF_USE_LABEL */
5362
5363
5364
5365 #if FF_USE_EXPAND && !FF_FS_READONLY
5366 /*-----------------------------------------------------------------------*/
5367 /* Allocate a Contiguous Blocks to the File */
5368 /*-----------------------------------------------------------------------*/
5369
5370 FRESULT f_expand (
5371 FIL* fp, /* Pointer to the file object */
5372 FSIZE_t fsz, /* File size to be expanded to */
5373 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
5374 )
5375 {
5376 FRESULT res;
5377 FATFS *fs;
5378 DWORD n, clst, stcl, scl, ncl, tcl, lclst;
5379
5380
5381 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5382 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5383 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
5384 #if FF_FS_EXFAT
5385 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
5386 #endif
5387 n = (DWORD)fs->csize * SS(fs); /* Cluster size */
5388 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
5389 stcl = fs->last_clst; lclst = 0;
5390 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
5391
5392 #if FF_FS_EXFAT
5393 if (fs->fs_type == FS_EXFAT) {
5394 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
5395 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
5396 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
5397 if (res == FR_OK) { /* A contiguous free area is found */
5398 if (opt) { /* Allocate it now */
5399 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
5400 lclst = scl + tcl - 1;
5401 } else { /* Set it as suggested point for next allocation */
5402 lclst = scl - 1;
5403 }
5404 }
5405 } else
5406 #endif
5407 {
5408 scl = clst = stcl; ncl = 0;
5409 for (;;) { /* Find a contiguous cluster block */
5410 n = get_fat(&fp->obj, clst);
5411 if (++clst >= fs->n_fatent) clst = 2;
5412 if (n == 1) { res = FR_INT_ERR; break; }
5413 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
5414 if (n == 0) { /* Is it a free cluster? */
5415 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
5416 } else {
5417 scl = clst; ncl = 0; /* Not a free cluster */
5418 }
5419 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */
5420 }
5421 if (res == FR_OK) { /* A contiguous free area is found */
5422 if (opt) { /* Allocate it now */
5423 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
5424 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
5425 if (res != FR_OK) break;
5426 lclst = clst;
5427 }
5428 } else { /* Set it as suggested point for next allocation */
5429 lclst = scl - 1;
5430 }
5431 }
5432 }
5433
5434 if (res == FR_OK) {
5435 fs->last_clst = lclst; /* Set suggested start cluster to start next */
5436 if (opt) { /* Is it allocated now? */
5437 fp->obj.sclust = scl; /* Update object allocation information */
5438 fp->obj.objsize = fsz;
5439 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
5440 fp->flag |= FA_MODIFIED;
5441 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */
5442 fs->free_clst -= tcl;
5443 fs->fsi_flag |= 1;
5444 }
5445 }
5446 }
5447
5448 LEAVE_FF(fs, res);
5449 }
5450
5451 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */
5452
5453
5454
5455 #if FF_USE_FORWARD
5456 /*-----------------------------------------------------------------------*/
5457 /* Forward Data to the Stream Directly */
5458 /*-----------------------------------------------------------------------*/
5459
5460 FRESULT f_forward (
5461 FIL* fp, /* Pointer to the file object */
5462 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
5463 UINT btf, /* Number of bytes to forward */
5464 UINT* bf /* Pointer to number of bytes forwarded */
5465 )
5466 {
5467 FRESULT res;
5468 FATFS *fs;
5469 DWORD clst, sect;
5470 FSIZE_t remain;
5471 UINT rcnt, csect;
5472 BYTE *dbuf;
5473
5474
5475 *bf = 0; /* Clear transfer byte counter */
5476 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5477 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5478 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
5479
5480 remain = fp->obj.objsize - fp->fptr;
5481 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
5482
5483 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */
5484 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
5485 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
5486 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
5487 if (csect == 0) { /* On the cluster boundary? */
5488 clst = (fp->fptr == 0) ? /* On the top of the file? */
5489 fp->obj.sclust : get_fat(&fp->obj, fp->clust);
5490 if (clst <= 1) ABORT(fs, FR_INT_ERR);
5491 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
5492 fp->clust = clst; /* Update current cluster */
5493 }
5494 }
5495 sect = clst2sect(fs, fp->clust); /* Get current data sector */
5496 if (sect == 0) ABORT(fs, FR_INT_ERR);
5497 sect += csect;
5498 #if FF_FS_TINY
5499 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
5500 dbuf = fs->win;
5501 #else
5502 if (fp->sect != sect) { /* Fill sector cache with file data */
5503 #if !FF_FS_READONLY
5504 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
5505 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5506 fp->flag &= (BYTE)~FA_DIRTY;
5507 }
5508 #endif
5509 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5510 }
5511 dbuf = fp->buf;
5512 #endif
5513 fp->sect = sect;
5514 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes left in the sector */
5515 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
5516 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
5517 if (rcnt == 0) ABORT(fs, FR_INT_ERR);
5518 }
5519
5520 LEAVE_FF(fs, FR_OK);
5521 }
5522 #endif /* FF_USE_FORWARD */
5523
5524
5525
5526 #if FF_USE_MKFS && !FF_FS_READONLY
5527 /*-----------------------------------------------------------------------*/
5528 /* Create an FAT/exFAT volume */
5529 /*-----------------------------------------------------------------------*/
5530
5531 FRESULT f_mkfs (
5532 const TCHAR* path, /* Logical drive number */
5533 BYTE opt, /* Format option */
5534 DWORD au, /* Size of allocation unit (cluster) [byte] */
5535 void* work, /* Pointer to working buffer (null: use heap memory) */
5536 UINT len /* Size of working buffer [byte] */
5537 )
5538 {
5539 const UINT n_fats = 1; /* Number of FATs for FAT/FAT32 volume (1 or 2) */
5540 const UINT n_rootdir = 512; /* Number of root directory entries for FAT volume */
5541 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */
5542 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */
5543 BYTE fmt, sys, *buf, *pte, pdrv, part;
5544 WORD ss; /* Sector size */
5545 DWORD szb_buf, sz_buf, sz_blk, n_clst, pau, sect, nsect, n;
5546 DWORD b_vol, b_fat, b_data; /* Base LBA for volume, fat, data */
5547 DWORD sz_vol, sz_rsv, sz_fat, sz_dir; /* Size for volume, fat, dir, data */
5548 UINT i;
5549 int vol;
5550 DSTATUS stat;
5551 #if FF_USE_TRIM || FF_FS_EXFAT
5552 DWORD tbl[3];
5553 #endif
5554
5555
5556 /* Check mounted drive and clear work area */
5557 vol = get_ldnumber(&path); /* Get target logical drive */
5558 if (vol < 0) return FR_INVALID_DRIVE;
5559 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the volume if mounted */
5560 pdrv = LD2PD(vol); /* Physical drive */
5561 part = LD2PT(vol); /* Partition (0:create as new, 1-4:get from partition table) */
5562
5563 /* Check physical drive status */
5564 stat = disk_initialize(pdrv);
5565 if (stat & STA_NOINIT) return FR_NOT_READY;
5566 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
5567 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 */
5568 #if FF_MAX_SS != FF_MIN_SS /* Get sector size of the medium if variable sector size cfg. */
5569 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
5570 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5571 #else
5572 ss = FF_MAX_SS;
5573 #endif
5574 if ((au != 0 && au < ss) || au > 0x1000000 || (au & (au - 1))) return FR_INVALID_PARAMETER; /* Check if au is valid */
5575 au /= ss; /* Cluster size in unit of sector */
5576
5577 /* Get working buffer */
5578 #if FF_USE_LFN == 3
5579 if (!work) { /* Use heap memory for working buffer */
5580 for (szb_buf = MAX_MALLOC, buf = 0; szb_buf >= ss && (buf = ff_memalloc(szb_buf)) == 0; szb_buf /= 2) ;
5581 sz_buf = szb_buf / ss; /* Size of working buffer (sector) */
5582 } else
5583 #endif
5584 {
5585 buf = (BYTE*)work; /* Working buffer */
5586 sz_buf = len / ss; /* Size of working buffer (sector) */
5587 szb_buf = sz_buf * ss; /* Size of working buffer (byte) */
5588 }
5589 if (!buf || sz_buf == 0) {
5590 ff_memfree(buf);
5591 return FR_NOT_ENOUGH_CORE;
5592 }
5593 /* Determine where the volume to be located (b_vol, sz_vol) */
5594 if (FF_MULTI_PARTITION && part != 0) {
5595 /* Get partition information from partition table in the MBR */
5596 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */
5597 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */
5598 pte = buf + (MBR_Table + (part - 1) * SZ_PTE);
5599 if (pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */
5600 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
5601 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
5602 } else {
5603 /* Create a single-partition in this function */
5604 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5605 b_vol = (opt & FM_SFD) ? 0 : 63; /* Volume start sector */
5606 if (sz_vol < b_vol) LEAVE_MKFS(FR_MKFS_ABORTED);
5607 sz_vol -= b_vol; /* Volume size */
5608 }
5609 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */
5610
5611 /* Pre-determine the FAT type */
5612 do {
5613 if (FF_FS_EXFAT && (opt & FM_EXFAT)) { /* exFAT possible? */
5614 if ((opt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || au > 128) { /* exFAT only, vol >= 64Ms or au > 128s ? */
5615 fmt = FS_EXFAT; break;
5616 }
5617 }
5618 if (au > 128) LEAVE_MKFS(FR_INVALID_PARAMETER); /* Too large au for FAT/FAT32 */
5619 if (opt & FM_FAT32) { /* FAT32 possible? */
5620 if ((opt & FM_ANY) == FM_FAT32 || !(opt & FM_FAT)) { /* FAT32 only or no-FAT? */
5621 fmt = FS_FAT32; break;
5622 }
5623 }
5624 if (!(opt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */
5625 fmt = FS_FAT16;
5626 } while (0);
5627
5628 #if FF_FS_EXFAT
5629 if (fmt == FS_EXFAT) { /* Create an exFAT volume */
5630 DWORD szb_bit, szb_case, sum, nb, cl;
5631 WCHAR ch, si;
5632 UINT j, st;
5633 BYTE b;
5634
5635 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
5636 #if FF_USE_TRIM
5637 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area may be erased */
5638 disk_ioctl(pdrv, CTRL_TRIM, tbl);
5639 #endif
5640 /* Determine FAT location, data location and number of clusters */
5641 if (au == 0) { /* au auto-selection */
5642 au = 8;
5643 if (sz_vol >= 0x80000) au = 64; /* >= 512Ks */
5644 if (sz_vol >= 0x4000000) au = 256; /* >= 64Ms */
5645 }
5646 b_fat = b_vol + 32; /* FAT start at offset 32 */
5647 sz_fat = ((sz_vol / au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
5648 b_data = (b_fat + sz_fat + sz_blk - 1) & ~(sz_blk - 1); /* Align data area to the erase block boundary */
5649 if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
5650 n_clst = (sz_vol - (b_data - b_vol)) / au; /* Number of clusters */
5651 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */
5652 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */
5653
5654 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
5655 tbl[0] = (szb_bit + au * ss - 1) / (au * ss); /* Number of allocation bitmap clusters */
5656
5657 /* Create a compressed up-case table */
5658 sect = b_data + au * tbl[0]; /* Table start sector */
5659 sum = 0; /* Table checksum to be stored in the 82 entry */
5660 st = 0; si = 0; i = 0; j = 0; szb_case = 0;
5661 do {
5662 switch (st) {
5663 case 0:
5664 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */
5665 if (ch != si) {
5666 si++; break; /* Store the up-case char if exist */
5667 }
5668 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
5669 if (j >= 128) {
5670 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */
5671 }
5672 st = 1; /* Do not compress short run */
5673 /* go to next case */
5674 case 1:
5675 ch = si++; /* Fill the short run */
5676 if (--j == 0) st = 0;
5677 break;
5678
5679 default:
5680 ch = (WCHAR)j; si += (WCHAR)j; /* Number of chars to skip */
5681 st = 0;
5682 }
5683 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
5684 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
5685 i += 2; szb_case += 2;
5686 if (si == 0 || i == szb_buf) { /* Write buffered data when buffer full or end of process */
5687 n = (i + ss - 1) / ss;
5688 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5689 sect += n; i = 0;
5690 }
5691 } while (si);
5692 tbl[1] = (szb_case + au * ss - 1) / (au * ss); /* Number of up-case table clusters */
5693 tbl[2] = 1; /* Number of root dir clusters */
5694
5695 /* Initialize the allocation bitmap */
5696 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */
5697 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */
5698 do {
5699 mem_set(buf, 0, szb_buf);
5700 for (i = 0; nb >= 8 && i < szb_buf; buf[i++] = 0xFF, nb -= 8) ;
5701 for (b = 1; nb != 0 && i < szb_buf; buf[i] |= b, b <<= 1, nb--) ;
5702 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
5703 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5704 sect += n; nsect -= n;
5705 } while (nsect);
5706
5707 /* Initialize the FAT */
5708 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
5709 j = nb = cl = 0;
5710 do {
5711 mem_set(buf, 0, szb_buf); i = 0; /* Clear work area and reset write index */
5712 if (cl == 0) { /* Set entry 0 and 1 */
5713 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
5714 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
5715 }
5716 do { /* Create chains of bitmap, up-case and root dir */
5717 while (nb != 0 && i < szb_buf) { /* Create a chain */
5718 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
5719 i += 4; cl++; nb--;
5720 }
5721 if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */
5722 } while (nb != 0 && i < szb_buf);
5723 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
5724 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5725 sect += n; nsect -= n;
5726 } while (nsect);
5727
5728 /* Initialize the root directory */
5729 mem_set(buf, 0, szb_buf);
5730 buf[SZDIRE * 0 + 0] = ET_VLABEL; /* Volume label entry */
5731 buf[SZDIRE * 1 + 0] = ET_BITMAP; /* Bitmap entry */
5732 st_dword(buf + SZDIRE * 1 + 20, 2); /* cluster */
5733 st_dword(buf + SZDIRE * 1 + 24, szb_bit); /* size */
5734 buf[SZDIRE * 2 + 0] = ET_UPCASE; /* Up-case table entry */
5735 st_dword(buf + SZDIRE * 2 + 4, sum); /* sum */
5736 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); /* cluster */
5737 st_dword(buf + SZDIRE * 2 + 24, szb_case); /* size */
5738 sect = b_data + au * (tbl[0] + tbl[1]); nsect = au; /* Start of the root directory and number of sectors */
5739 do { /* Fill root directory sectors */
5740 n = (nsect > sz_buf) ? sz_buf : nsect;
5741 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5742 mem_set(buf, 0, ss);
5743 sect += n; nsect -= n;
5744 } while (nsect);
5745
5746 /* Create two set of the exFAT VBR blocks */
5747 sect = b_vol;
5748 for (n = 0; n < 2; n++) {
5749 /* Main record (+0) */
5750 mem_set(buf, 0, ss);
5751 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
5752 st_dword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
5753 st_dword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
5754 st_dword(buf + BPB_FatOfsEx, b_fat - b_vol); /* FAT offset [sector] */
5755 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
5756 st_dword(buf + BPB_DataOfsEx, b_data - b_vol); /* Data offset [sector] */
5757 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
5758 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */
5759 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */
5760 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */
5761 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
5762 for (buf[BPB_SecPerClusEx] = 0, i = au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
5763 buf[BPB_NumFATsEx] = 1; /* Number of FATs */
5764 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
5765 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
5766 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
5767 for (i = sum = 0; i < ss; i++) { /* VBR checksum */
5768 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
5769 }
5770 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5771 /* Extended bootstrap record (+1..+8) */
5772 mem_set(buf, 0, ss);
5773 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
5774 for (j = 1; j < 9; j++) {
5775 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
5776 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5777 }
5778 /* OEM/Reserved record (+9..+10) */
5779 mem_set(buf, 0, ss);
5780 for ( ; j < 11; j++) {
5781 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
5782 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5783 }
5784 /* Sum record (+11) */
5785 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
5786 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5787 }
5788
5789 } else
5790 #endif /* FF_FS_EXFAT */
5791 { /* Create an FAT/FAT32 volume */
5792 do {
5793 pau = au;
5794 /* Pre-determine number of clusters and FAT sub-type */
5795 if (fmt == FS_FAT32) { /* FAT32 volume */
5796 if (pau == 0) { /* au auto-selection */
5797 n = sz_vol / 0x20000; /* Volume size in unit of 128KS */
5798 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
5799 }
5800 n_clst = sz_vol / pau; /* Number of clusters */
5801 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
5802 sz_rsv = 32; /* Number of reserved sectors */
5803 sz_dir = 0; /* No static directory */
5804 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED);
5805 } else { /* FAT volume */
5806 if (pau == 0) { /* au auto-selection */
5807 n = sz_vol / 0x1000; /* Volume size in unit of 4KS */
5808 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
5809 }
5810 n_clst = sz_vol / pau;
5811 if (n_clst > MAX_FAT12) {
5812 n = n_clst * 2 + 4; /* FAT size [byte] */
5813 } else {
5814 fmt = FS_FAT12;
5815 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
5816 }
5817 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
5818 sz_rsv = 1; /* Number of reserved sectors */
5819 sz_dir = (DWORD)n_rootdir * SZDIRE / ss; /* Rootdir size [sector] */
5820 }
5821 b_fat = b_vol + sz_rsv; /* FAT base */
5822 b_data = b_fat + sz_fat * n_fats + sz_dir; /* Data base */
5823
5824 /* Align data base to erase block boundary (for flash memory media) */
5825 n = ((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data; /* Next nearest erase block from current data base */
5826 if (fmt == FS_FAT32) { /* FAT32: Move FAT base */
5827 sz_rsv += n; b_fat += n;
5828 } else { /* FAT: Expand FAT size */
5829 sz_fat += n / n_fats;
5830 }
5831
5832 /* Determine number of clusters and final check of validity of the FAT sub-type */
5833 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume */
5834 n_clst = (sz_vol - sz_rsv - sz_fat * n_fats - sz_dir) / pau;
5835 if (fmt == FS_FAT32) {
5836 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32 */
5837 if (au == 0 && (au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
5838 LEAVE_MKFS(FR_MKFS_ABORTED);
5839 }
5840 }
5841 if (fmt == FS_FAT16) {
5842 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
5843 if (au == 0 && (pau * 2) <= 64) {
5844 au = pau * 2; continue; /* Adjust cluster size and retry */
5845 }
5846 if ((opt & FM_FAT32)) {
5847 fmt = FS_FAT32; continue; /* Switch type to FAT32 and retry */
5848 }
5849 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
5850 LEAVE_MKFS(FR_MKFS_ABORTED);
5851 }
5852 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
5853 if (au == 0 && (au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
5854 LEAVE_MKFS(FR_MKFS_ABORTED);
5855 }
5856 }
5857 if (fmt == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */
5858
5859 /* Ok, it is the valid cluster configuration */
5860 break;
5861 } while (1);
5862
5863 #if FF_USE_TRIM
5864 tbl[0] = b_vol; tbl[1] = b_vol + sz_vol - 1; /* Inform the device the volume area can be erased */
5865 disk_ioctl(pdrv, CTRL_TRIM, tbl);
5866 #endif
5867 /* Create FAT VBR */
5868 mem_set(buf, 0, ss);
5869 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */
5870 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
5871 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
5872 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
5873 buf[BPB_NumFATs] = (BYTE)n_fats; /* Number of FATs */
5874 st_word(buf + BPB_RootEntCnt, (WORD)((fmt == FS_FAT32) ? 0 : n_rootdir)); /* Number of root directory entries */
5875 if (sz_vol < 0x10000) {
5876 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
5877 } else {
5878 st_dword(buf + BPB_TotSec32, sz_vol); /* Volume size in 32-bit LBA */
5879 }
5880 buf[BPB_Media] = 0xF8; /* Media descriptor byte */
5881 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
5882 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
5883 st_dword(buf + BPB_HiddSec, b_vol); /* Volume offset in the physical drive [sector] */
5884 if (fmt == FS_FAT32) {
5885 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */
5886 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
5887 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
5888 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
5889 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
5890 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
5891 buf[BS_BootSig32] = 0x29; /* Extended boot signature */
5892 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
5893 } else {
5894 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */
5895 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
5896 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
5897 buf[BS_BootSig] = 0x29; /* Extended boot signature */
5898 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
5899 }
5900 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
5901 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */
5902
5903 /* Create FSINFO record if needed */
5904 if (fmt == FS_FAT32) {
5905 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
5906 mem_set(buf, 0, ss);
5907 st_dword(buf + FSI_LeadSig, 0x41615252);
5908 st_dword(buf + FSI_StrucSig, 0x61417272);
5909 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
5910 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
5911 st_word(buf + BS_55AA, 0xAA55);
5912 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
5913 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
5914 }
5915
5916 /* Initialize FAT area */
5917 mem_set(buf, 0, (UINT)szb_buf);
5918 sect = b_fat; /* FAT start sector */
5919 for (i = 0; i < n_fats; i++) { /* Initialize FATs each */
5920 if (fmt == FS_FAT32) {
5921 st_dword(buf + 0, 0xFFFFFFF8); /* Entry 0 */
5922 st_dword(buf + 4, 0xFFFFFFFF); /* Entry 1 */
5923 st_dword(buf + 8, 0x0FFFFFFF); /* Entry 2 (root directory) */
5924 } else {
5925 st_dword(buf + 0, (fmt == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* Entry 0 and 1 */
5926 }
5927 nsect = sz_fat; /* Number of FAT sectors */
5928 do { /* Fill FAT sectors */
5929 n = (nsect > sz_buf) ? sz_buf : nsect;
5930 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5931 mem_set(buf, 0, ss);
5932 sect += n; nsect -= n;
5933 } while (nsect);
5934 }
5935
5936 /* Initialize root directory (fill with zero) */
5937 nsect = (fmt == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
5938 do {
5939 n = (nsect > sz_buf) ? sz_buf : nsect;
5940 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5941 sect += n; nsect -= n;
5942 } while (nsect);
5943 }
5944
5945 /* Determine system ID in the partition table */
5946 if (FF_FS_EXFAT && fmt == FS_EXFAT) {
5947 sys = 0x07; /* HPFS/NTFS/exFAT */
5948 } else {
5949 if (fmt == FS_FAT32) {
5950 sys = 0x0C; /* FAT32X */
5951 } else {
5952 if (sz_vol >= 0x10000) {
5953 sys = 0x06; /* FAT12/16 (large) */
5954 } else {
5955 sys = (fmt == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */
5956 }
5957 }
5958 }
5959
5960 /* Update partition information */
5961 if (FF_MULTI_PARTITION && part != 0) { /* Created in the existing partition */
5962 /* Update system ID in the partition table */
5963 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */
5964 buf[MBR_Table + (part - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */
5965 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */
5966 } else { /* Created as a new single partition */
5967 if (!(opt & FM_SFD)) { /* Create partition table if in FDISK format */
5968 mem_set(buf, 0, ss);
5969 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
5970 pte = buf + MBR_Table; /* Create partition table for single partition in the drive */
5971 pte[PTE_Boot] = 0; /* Boot indicator */
5972 pte[PTE_StHead] = 1; /* Start head */
5973 pte[PTE_StSec] = 1; /* Start sector */
5974 pte[PTE_StCyl] = 0; /* Start cylinder */
5975 pte[PTE_System] = sys; /* System type */
5976 n = (b_vol + sz_vol) / (63 * 255); /* (End CHS may be invalid) */
5977 pte[PTE_EdHead] = 254; /* End head */
5978 pte[PTE_EdSec] = (BYTE)(((n >> 2) & 0xC0) | 63); /* End sector */
5979 pte[PTE_EdCyl] = (BYTE)n; /* End cylinder */
5980 st_dword(pte + PTE_StLba, b_vol); /* Start offset in LBA */
5981 st_dword(pte + PTE_SizLba, sz_vol); /* Size in sectors */
5982 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the MBR */
5983 }
5984 }
5985
5986 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5987
5988 LEAVE_MKFS(FR_OK);
5989 }
5990
5991
5992
5993 #if FF_MULTI_PARTITION
5994 /*-----------------------------------------------------------------------*/
5995 /* Create Partition Table on the Physical Drive */
5996 /*-----------------------------------------------------------------------*/
5997
5998 #define CLUSTER_SIZE 63
5999 #define SUPPORTED_FLASH_SIZE 0x1000
6000
6001 FRESULT f_fdisk (
6002 BYTE pdrv, /* Physical drive number */
6003 const DWORD* szt, /* Pointer to the size table for each partitions */
6004 void* work /* Pointer to the working buffer (null: use heap memory) */
6005 )
6006 {
6007 UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
6008 BYTE s_hd, e_hd, *p, *buf = (BYTE*)work;
6009 DSTATUS stat;
6010 DWORD sz_disk, sz_part, s_part;
6011 DWORD cluster_size = CLUSTER_SIZE;
6012 FRESULT res;
6013
6014
6015 stat = disk_initialize(pdrv);
6016 if (stat & STA_NOINIT) return FR_NOT_READY;
6017 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
6018 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
6019
6020 buf = (BYTE*)work;
6021 #if FF_USE_LFN == 3
6022 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */
6023 #endif
6024 if (!buf) return FR_NOT_ENOUGH_CORE;
6025
6026 /* Determine the CHS without any consideration of the drive geometry */
6027 for (n = 16; n < 256 && sz_disk / n / cluster_size > 1024; n *= 2) {
6028 ;
6029 }
6030 if (n == 256) n--;
6031 if (sz_disk < SUPPORTED_FLASH_SIZE) {
6032 cluster_size = 1;
6033 n = sz_disk;
6034 }
6035 e_hd = n - 1;
6036 sz_cyl = cluster_size * n;
6037 tot_cyl = sz_disk / sz_cyl;
6038
6039 /* Create partition table */
6040 mem_set(buf, 0, FF_MAX_SS);
6041 p = buf + MBR_Table; b_cyl = 0;
6042 for (i = 0; i < 4; i++, p += SZ_PTE) {
6043 p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl; /* Number of cylinders */
6044 if (p_cyl == 0) continue;
6045 s_part = (DWORD)sz_cyl * b_cyl;
6046 sz_part = (DWORD)sz_cyl * p_cyl;
6047 if (i == 0) { /* Exclude first track of cylinder 0 */
6048 s_hd = 1;
6049 s_part += cluster_size; sz_part -= cluster_size;
6050 } else {
6051 s_hd = 0;
6052 }
6053 e_cyl = b_cyl + p_cyl - 1; /* End cylinder */
6054 if (e_cyl >= tot_cyl) LEAVE_MKFS(FR_INVALID_PARAMETER);
6055
6056 /* Set partition table */
6057 p[1] = s_hd; /* Start head */
6058 p[2] = (BYTE)(((b_cyl >> 2) & 0xC0) | 1); /* Start sector */
6059 p[3] = (BYTE)b_cyl; /* Start cylinder */
6060 p[4] = 0x07; /* System type (temporary setting) */
6061 p[5] = e_hd; /* End head */
6062 p[6] = (BYTE)(((e_cyl >> 2) & 0xC0) | cluster_size); /* End sector */
6063 p[7] = (BYTE)e_cyl; /* End cylinder */
6064 st_dword(p + 8, s_part); /* Start sector in LBA */
6065 st_dword(p + 12, sz_part); /* Number of sectors */
6066
6067 /* Next partition */
6068 b_cyl += p_cyl;
6069 }
6070 st_word(p, 0xAA55); /* MBR signature (always at offset 510) */
6071
6072 /* Write it to the MBR */
6073 res = (disk_write(pdrv, buf, 0, 1) == RES_OK && disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
6074 LEAVE_MKFS(res);
6075 }
6076
6077 #endif /* FF_MULTI_PARTITION */
6078 #endif /* FF_USE_MKFS && !FF_FS_READONLY */
6079
6080
6081
6082
6083 #if FF_USE_STRFUNC
6084 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3)
6085 #error Wrong FF_STRF_ENCODE setting
6086 #endif
6087 /*-----------------------------------------------------------------------*/
6088 /* Get a String from the File */
6089 /*-----------------------------------------------------------------------*/
6090
6091 TCHAR* f_gets (
6092 TCHAR* buff, /* Pointer to the string buffer to read */
6093 int len, /* Size of string buffer (items) */
6094 FIL* fp /* Pointer to the file object */
6095 )
6096 {
6097 int nc = 0;
6098 TCHAR *p = buff;
6099 BYTE s[4];
6100 UINT rc;
6101 DWORD dc;
6102 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2
6103 WCHAR wc;
6104 #endif
6105 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3
6106 UINT ct;
6107 #endif
6108
6109 #if FF_USE_LFN && FF_LFN_UNICODE /* With code conversion (Unicode API) */
6110 /* Make a room for the character and terminator */
6111 if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2;
6112 if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4;
6113 if (FF_LFN_UNICODE == 3) len -= 1;
6114 while (nc < len) {
6115 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */
6116 f_read(fp, s, 1, &rc);
6117 if (rc != 1) break;
6118 wc = s[0];
6119 if (dbc_1st((BYTE)wc)) {
6120 f_read(fp, s, 1, &rc);
6121 if (rc != 1 || !dbc_2nd(s[0])) continue;
6122 wc = wc << 8 | s[0];
6123 }
6124 dc = ff_oem2uni(wc, CODEPAGE);
6125 if (dc == 0) continue;
6126 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */
6127 f_read(fp, s, 2, &rc);
6128 if (rc != 2) break;
6129 dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6130 if (IsSurrogateL(dc)) continue;
6131 if (IsSurrogateH(dc)) {
6132 f_read(fp, s, 2, &rc);
6133 if (rc != 2) break;
6134 wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6135 if (!IsSurrogateL(wc)) continue;
6136 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF);
6137 }
6138 #else /* Read a character in UTF-8 */
6139 f_read(fp, s, 1, &rc);
6140 if (rc != 1) break;
6141 dc = s[0];
6142 if (dc >= 0x80) { /* Multi-byte character? */
6143 ct = 0;
6144 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } /* 2-byte? */
6145 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } /* 3-byte? */
6146 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } /* 4-byte? */
6147 if (ct == 0) continue;
6148 f_read(fp, s, ct, &rc); /* Get trailing bytes */
6149 if (rc != ct) break;
6150 rc = 0;
6151 do { /* Merge trailing bytes */
6152 if ((s[rc] & 0xC0) != 0x80) break;
6153 dc = dc << 6 | (s[rc] & 0x3F);
6154 } while (++rc < ct);
6155 if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue; /* Wrong encoding? */
6156 }
6157 #endif
6158 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; /* Strip \r off if needed */
6159 #if FF_LFN_UNICODE == 1 || FF_LFN_UNICODE == 3 /* Output it in UTF-16/32 encoding */
6160 if (FF_LFN_UNICODE == 1 && dc >= 0x10000) { /* Out of BMP at UTF-16? */
6161 *p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++; /* Make and output high surrogate */
6162 dc = 0xDC00 | (dc & 0x3FF); /* Make low surrogate */
6163 }
6164 *p++ = (TCHAR)dc; nc++;
6165 if (dc == '\n') break; /* End of line? */
6166 #elif FF_LFN_UNICODE == 2 /* Output it in UTF-8 encoding */
6167 if (dc < 0x80) { /* 1-byte */
6168 *p++ = (TCHAR)dc;
6169 nc++;
6170 if (dc == '\n') break; /* End of line? */
6171 } else {
6172 if (dc < 0x800) { /* 2-byte */
6173 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F));
6174 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6175 nc += 2;
6176 } else {
6177 if (dc < 0x10000) { /* 3-byte */
6178 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F));
6179 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6180 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6181 nc += 3;
6182 } else { /* 4-byte */
6183 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07));
6184 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F));
6185 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6186 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6187 nc += 4;
6188 }
6189 }
6190 }
6191 #endif
6192 }
6193
6194 #else /* Byte-by-byte without any conversion (ANSI/OEM API) */
6195 len -= 1; /* Make a room for the terminator */
6196 while (nc < len) {
6197 f_read(fp, s, 1, &rc);
6198 if (rc != 1) break;
6199 dc = s[0];
6200 if (FF_USE_STRFUNC == 2 && dc == '\r') continue;
6201 *p++ = (TCHAR)dc; nc++;
6202 if (dc == '\n') break;
6203 }
6204 #endif
6205
6206 *p = 0; /* Terminate the string */
6207 return nc ? buff : 0; /* When no data read due to EOF or error, return with error. */
6208 }
6209
6210
6211
6212
6213 #if !FF_FS_READONLY
6214 #include <stdarg.h>
6215 /*-----------------------------------------------------------------------*/
6216 /* Put a Character to the File */
6217 /*-----------------------------------------------------------------------*/
6218
6219 typedef struct { /* Putchar output buffer and work area */
6220 FIL *fp; /* Ptr to the writing file */
6221 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */
6222 #if FF_USE_LFN && FF_LFN_UNICODE == 1
6223 WCHAR hs;
6224 #elif FF_USE_LFN && FF_LFN_UNICODE == 2
6225 BYTE bs[4];
6226 UINT wi, ct;
6227 #endif
6228 BYTE buf[64]; /* Write buffer */
6229 } putbuff;
6230
6231
6232 static void putc_bfd ( /* Buffered write with code conversion */
6233 putbuff* pb,
6234 TCHAR c
6235 )
6236 {
6237 UINT n;
6238 int i, nc;
6239 #if FF_USE_LFN && FF_LFN_UNICODE
6240 WCHAR hs, wc;
6241 #if FF_LFN_UNICODE == 2
6242 DWORD dc;
6243 TCHAR *tp;
6244 #endif
6245 #endif
6246
6247 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
6248 putc_bfd(pb, '\r');
6249 }
6250
6251 i = pb->idx; /* Write index of pb->buf[] */
6252 if (i < 0) return;
6253 nc = pb->nchr; /* Write unit counter */
6254
6255 #if FF_USE_LFN && FF_LFN_UNICODE
6256 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
6257 if (IsSurrogateH(c)) {
6258 pb->hs = c; return;
6259 }
6260 hs = pb->hs; pb->hs = 0;
6261 if (hs != 0) {
6262 if (!IsSurrogateL(c)) hs = 0;
6263 } else {
6264 if (IsSurrogateL(c)) return;
6265 }
6266 wc = c;
6267 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
6268 for (;;) {
6269 if (pb->ct == 0) { /* Out of multi-byte sequence? */
6270 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */
6271 if ((BYTE)c < 0x80) break; /* 1-byte? */
6272 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte? */
6273 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte? */
6274 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte? */
6275 return;
6276 } else { /* In the multi-byte sequence */
6277 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */
6278 pb->ct = 0; continue;
6279 }
6280 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */
6281 if (--pb->ct == 0) break; /* End of multi-byte sequence? */
6282 return;
6283 }
6284 }
6285 tp = (TCHAR*)pb->bs;
6286 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */
6287 if (dc == 0xFFFFFFFF) return;
6288 wc = (WCHAR)dc;
6289 hs = (WCHAR)(dc >> 16);
6290 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
6291 if (IsSurrogate(c) || c >= 0x110000) return;
6292 if (c >= 0x10000) {
6293 hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); /* Make high surrogate */
6294 wc = 0xDC00 | (c & 0x3FF); /* Make low surrogate */
6295 } else {
6296 hs = 0;
6297 wc = (WCHAR)c;
6298 }
6299 #endif
6300
6301 #if FF_STRF_ENCODE == 1 /* Write a character in UTF-16LE */
6302 if (hs != 0) {
6303 st_word(&pb->buf[i], hs);
6304 i += 2;
6305 nc++;
6306 }
6307 st_word(&pb->buf[i], wc);
6308 i += 2;
6309 #elif FF_STRF_ENCODE == 2 /* Write a character in UTF-16BE */
6310 if (hs != 0) {
6311 pb->buf[i++] = (BYTE)(hs >> 8);
6312 pb->buf[i++] = (BYTE)hs;
6313 nc++;
6314 }
6315 pb->buf[i++] = (BYTE)(wc >> 8);
6316 pb->buf[i++] = (BYTE)wc;
6317 #elif FF_STRF_ENCODE == 3 /* Write it in UTF-8 */
6318 if (hs != 0) { /* 4-byte */
6319 nc += 3;
6320 hs = (hs & 0x3FF) + 0x40;
6321 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8);
6322 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F));
6323 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F));
6324 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6325 } else {
6326 if (wc < 0x80) { /* 1-byte */
6327 pb->buf[i++] = (BYTE)wc;
6328 } else {
6329 if (wc < 0x800) { /* 2-byte */
6330 nc += 1;
6331 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6);
6332 } else { /* 3-byte */
6333 nc += 2;
6334 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12);
6335 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F));
6336 }
6337 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6338 }
6339 }
6340 #else /* Write it in ANSI/OEM */
6341 if (hs != 0) return;
6342 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */
6343 if (wc == 0) return;
6344 if (wc >= 0x100) {
6345 pb->buf[i++] = (BYTE)(wc >> 8); nc++;
6346 }
6347 pb->buf[i++] = (BYTE)wc;
6348 #endif
6349
6350 #else /* ANSI/OEM input (without re-encode) */
6351 pb->buf[i++] = (BYTE)c;
6352 #endif
6353
6354 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */
6355 f_write(pb->fp, pb->buf, (UINT)i, &n);
6356 i = (n == (UINT)i) ? 0 : -1;
6357 }
6358 pb->idx = i;
6359 pb->nchr = nc + 1;
6360 }
6361
6362
6363 static int putc_flush ( /* Flush left characters in the buffer */
6364 putbuff* pb
6365 )
6366 {
6367 UINT nw;
6368
6369 if ( pb->idx >= 0 /* Flush buffered characters to the file */
6370 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
6371 && (UINT)pb->idx == nw) return pb->nchr;
6372 return EOF;
6373 }
6374
6375
6376 static void putc_init ( /* Initialize write buffer */
6377 putbuff* pb,
6378 FIL* fp
6379 )
6380 {
6381 mem_set(pb, 0, sizeof (putbuff));
6382 pb->fp = fp;
6383 }
6384
6385
6386
6387 int f_putc (
6388 TCHAR c, /* A character to be output */
6389 FIL* fp /* Pointer to the file object */
6390 )
6391 {
6392 putbuff pb;
6393
6394
6395 putc_init(&pb, fp);
6396 putc_bfd(&pb, c); /* Put the character */
6397 return putc_flush(&pb);
6398 }
6399
6400
6401
6402
6403 /*-----------------------------------------------------------------------*/
6404 /* Put a String to the File */
6405 /*-----------------------------------------------------------------------*/
6406
6407 int f_puts (
6408 const TCHAR* str, /* Pointer to the string to be output */
6409 FIL* fp /* Pointer to the file object */
6410 )
6411 {
6412 putbuff pb;
6413
6414
6415 putc_init(&pb, fp);
6416 while (*str) putc_bfd(&pb, *str++); /* Put the string */
6417 return putc_flush(&pb);
6418 }
6419
6420
6421
6422
6423 /*-----------------------------------------------------------------------*/
6424 /* Put a Formatted String to the File */
6425 /*-----------------------------------------------------------------------*/
6426
6427 int f_printf (
6428 FIL* fp, /* Pointer to the file object */
6429 const TCHAR* fmt, /* Pointer to the format string */
6430 ... /* Optional arguments... */
6431 )
6432 {
6433 va_list arp;
6434 putbuff pb;
6435 BYTE f, r;
6436 UINT i, j, w;
6437 DWORD v;
6438 TCHAR c, d, str[32], *p;
6439
6440
6441 putc_init(&pb, fp);
6442
6443 va_start(arp, fmt);
6444
6445 for (;;) {
6446 c = *fmt++;
6447 if (c == 0) break; /* End of string */
6448 if (c != '%') { /* Non escape character */
6449 putc_bfd(&pb, c);
6450 continue;
6451 }
6452 w = f = 0;
6453 c = *fmt++;
6454 if (c == '0') { /* Flag: '0' padding */
6455 f = 1; c = *fmt++;
6456 } else {
6457 if (c == '-') { /* Flag: left justified */
6458 f = 2; c = *fmt++;
6459 }
6460 }
6461 if (c == '*') { /* Minimum width by argument */
6462 w = va_arg(arp, int);
6463 c = *fmt++;
6464 } else {
6465 while (IsDigit(c)) { /* Minimum width */
6466 w = w * 10 + c - '0';
6467 c = *fmt++;
6468 }
6469 }
6470 if (c == 'l' || c == 'L') { /* Type prefix: Size is long int */
6471 f |= 4; c = *fmt++;
6472 }
6473 if (c == 0) break;
6474 d = c;
6475 if (IsLower(d)) d -= 0x20;
6476 switch (d) { /* Atgument type is... */
6477 case 'S' : /* String */
6478 p = va_arg(arp, TCHAR*);
6479 for (j = 0; p[j]; j++) ;
6480 if (!(f & 2)) { /* Right padded */
6481 while (j++ < w) putc_bfd(&pb, ' ') ;
6482 }
6483 while (*p) putc_bfd(&pb, *p++) ; /* String body */
6484 while (j++ < w) putc_bfd(&pb, ' ') ; /* Left padded */
6485 continue;
6486
6487 case 'C' : /* Character */
6488 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
6489
6490 case 'B' : /* Unsigned binary */
6491 r = 2; break;
6492
6493 case 'O' : /* Unsigned octal */
6494 r = 8; break;
6495
6496 case 'D' : /* Signed decimal */
6497 case 'U' : /* Unsigned decimal */
6498 r = 10; break;
6499
6500 case 'X' : /* Unsigned hexdecimal */
6501 r = 16; break;
6502
6503 default: /* Unknown type (pass-through) */
6504 putc_bfd(&pb, c); continue;
6505 }
6506
6507 /* Get an argument and put it in numeral */
6508 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
6509 if (d == 'D' && (v & 0x80000000)) {
6510 v = 0 - v;
6511 f |= 8;
6512 }
6513 i = 0;
6514 do {
6515 d = (TCHAR)(v % r); v /= r;
6516 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
6517 str[i++] = d + '0';
6518 } while (v && i < sizeof str / sizeof *str);
6519 if (f & 8) str[i++] = '-';
6520 j = i; d = (f & 1) ? '0' : ' ';
6521 if (!(f & 2)) {
6522 while (j++ < w) putc_bfd(&pb, d); /* Right pad */
6523 }
6524 do {
6525 putc_bfd(&pb, str[--i]); /* Number body */
6526 } while (i);
6527 while (j++ < w) putc_bfd(&pb, d); /* Left pad */
6528 }
6529
6530 va_end(arp);
6531
6532 return putc_flush(&pb);
6533 }
6534
6535 #endif /* !FF_FS_READONLY */
6536 #endif /* FF_USE_STRFUNC */
6537
6538
6539
6540 #if FF_CODE_PAGE == 0
6541 /*-----------------------------------------------------------------------*/
6542 /* Set Active Codepage for the Path Name */
6543 /*-----------------------------------------------------------------------*/
6544
6545 FRESULT f_setcp (
6546 WORD cp /* Value to be set as active code page */
6547 )
6548 {
6549 static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0};
6550 static const BYTE* const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};
6551 UINT i;
6552
6553
6554 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */
6555 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */
6556
6557 CodePage = cp;
6558 if (cp >= 900) { /* DBCS */
6559 ExCvt = 0;
6560 DbcTbl = tables[i];
6561 } else { /* SBCS */
6562 ExCvt = tables[i];
6563 DbcTbl = 0;
6564 }
6565 return FR_OK;
6566 }
6567 #endif /* FF_CODE_PAGE == 0 */
6568
