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[Ventoy.git] / Ventoy2Disk / Ventoy2Disk / ff14 / source / ff.c
1 /*----------------------------------------------------------------------------/
2 / FatFs - Generic FAT Filesystem Module R0.14 /
3 /-----------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2019, ChaN, all right reserved.
6 /
7 / FatFs module is an open source software. Redistribution and use of FatFs in
8 / source and binary forms, with or without modification, are permitted provided
9 / that the following condition is met:
10 /
11 / 1. Redistributions of source code must retain the above copyright notice,
12 / this condition and the following disclaimer.
13 /
14 / This software is provided by the copyright holder and contributors "AS IS"
15 / and any warranties related to this software are DISCLAIMED.
16 / The copyright owner or contributors be NOT LIABLE for any damages caused
17 / by use of this software.
18 /
19 /----------------------------------------------------------------------------*/
20
21
22 #include "ff.h" /* Declarations of FatFs API */
23 #include "diskio.h" /* Declarations of device I/O functions */
24
25
26 /*--------------------------------------------------------------------------
27
28 Module Private Definitions
29
30 ---------------------------------------------------------------------------*/
31
32 #if FF_DEFINED != 86606 /* Revision ID */
33 #error Wrong include file (ff.h).
34 #endif
35
36
37 /* Limits and boundaries */
38 #define MAX_DIR 0x200000 /* Max size of FAT directory */
39 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */
40 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */
41 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */
42 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */
43 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */
44
45
46 /* Character code support macros */
47 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z')
48 #define IsLower(c) ((c) >= 'a' && (c) <= 'z')
49 #define IsDigit(c) ((c) >= '0' && (c) <= '9')
50 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF)
51 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF)
52 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF)
53
54
55 /* Additional file access control and file status flags for internal use */
56 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
57 #define FA_MODIFIED 0x40 /* File has been modified */
58 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
59
60
61 /* Additional file attribute bits for internal use */
62 #define AM_VOL 0x08 /* Volume label */
63 #define AM_LFN 0x0F /* LFN entry */
64 #define AM_MASK 0x3F /* Mask of defined bits */
65
66
67 /* Name status flags in fn[11] */
68 #define NSFLAG 11 /* Index of the name status byte */
69 #define NS_LOSS 0x01 /* Out of 8.3 format */
70 #define NS_LFN 0x02 /* Force to create LFN entry */
71 #define NS_LAST 0x04 /* Last segment */
72 #define NS_BODY 0x08 /* Lower case flag (body) */
73 #define NS_EXT 0x10 /* Lower case flag (ext) */
74 #define NS_DOT 0x20 /* Dot entry */
75 #define NS_NOLFN 0x40 /* Do not find LFN */
76 #define NS_NONAME 0x80 /* Not followed */
77
78
79 /* exFAT directory entry types */
80 #define ET_BITMAP 0x81 /* Allocation bitmap */
81 #define ET_UPCASE 0x82 /* Up-case table */
82 #define ET_VLABEL 0x83 /* Volume label */
83 #define ET_FILEDIR 0x85 /* File and directory */
84 #define ET_STREAM 0xC0 /* Stream extension */
85 #define ET_FILENAME 0xC1 /* Name extension */
86
87
88 /* FatFs refers the FAT structure as simple byte array instead of structure member
89 / because the C structure is not binary compatible between different platforms */
90
91 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
92 #define BS_OEMName 3 /* OEM name (8-byte) */
93 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
94 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
95 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
96 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */
97 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */
98 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
99 #define BPB_Media 21 /* Media descriptor byte (BYTE) */
100 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
101 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */
102 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
103 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
104 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
105 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
106 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */
107 #define BS_BootSig 38 /* Extended boot signature (BYTE) */
108 #define BS_VolID 39 /* Volume serial number (DWORD) */
109 #define BS_VolLab 43 /* Volume label string (8-byte) */
110 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */
111 #define BS_BootCode 62 /* Boot code (448-byte) */
112 #define BS_55AA 510 /* Signature word (WORD) */
113
114 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
115 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
116 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */
117 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
118 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
119 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
120 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
121 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
122 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
123 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
124 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
125 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
126 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
127
128 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
129 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
130 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
131 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
132 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
133 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
134 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
135 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */
136 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
137 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */
138 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD) */
139 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */
140 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */
141 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
142 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
143 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
144 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
145 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
146
147 #define DIR_Name 0 /* Short file name (11-byte) */
148 #define DIR_Attr 11 /* Attribute (BYTE) */
149 #define DIR_NTres 12 /* Lower case flag (BYTE) */
150 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
151 #define DIR_CrtTime 14 /* Created time (DWORD) */
152 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */
153 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
154 #define DIR_ModTime 22 /* Modified time (DWORD) */
155 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
156 #define DIR_FileSize 28 /* File size (DWORD) */
157 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */
158 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */
159 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */
160 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */
161 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */
162 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */
163 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */
164 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */
165 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */
166 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */
167 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */
168 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */
169 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */
170 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */
171 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */
172 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */
173 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */
174 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */
175 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */
176 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */
177 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */
178 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */
179 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */
180 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */
181 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */
182 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */
183
184 #define SZDIRE 32 /* Size of a directory entry */
185 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
186 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
187 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
188
189 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
190 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
191 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
192 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
193
194 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
195 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
196 #define PTE_Boot 0 /* MBR PTE: Boot indicator */
197 #define PTE_StHead 1 /* MBR PTE: Start head */
198 #define PTE_StSec 2 /* MBR PTE: Start sector */
199 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */
200 #define PTE_System 4 /* MBR PTE: System ID */
201 #define PTE_EdHead 5 /* MBR PTE: End head */
202 #define PTE_EdSec 6 /* MBR PTE: End sector */
203 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */
204 #define PTE_StLba 8 /* MBR PTE: Start in LBA */
205 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */
206
207 #define GPTH_Sign 0 /* GPT: Header signature (8-byte) */
208 #define GPTH_Rev 8 /* GPT: Revision (DWORD) */
209 #define GPTH_Size 12 /* GPT: Header size (DWORD) */
210 #define GPTH_Bcc 16 /* GPT: Header BCC (DWORD) */
211 #define GPTH_CurLba 24 /* GPT: Main header LBA (QWORD) */
212 #define GPTH_BakLba 32 /* GPT: Backup header LBA (QWORD) */
213 #define GPTH_FstLba 40 /* GPT: First LBA for partitions (QWORD) */
214 #define GPTH_LstLba 48 /* GPT: Last LBA for partitions (QWORD) */
215 #define GPTH_DskGuid 56 /* GPT: Disk GUID (16-byte) */
216 #define GPTH_PtOfs 72 /* GPT: Partation table LBA (QWORD) */
217 #define GPTH_PtNum 80 /* GPT: Number of table entries (DWORD) */
218 #define GPTH_PteSize 84 /* GPT: Size of table entry (DWORD) */
219 #define GPTH_PtBcc 88 /* GPT: Partation table BCC (DWORD) */
220 #define SZ_GPTE 128 /* GPT: Size of partition table entry */
221 #define GPTE_PtGuid 0 /* GPT PTE: Partition type GUID (16-byte) */
222 #define GPTE_UpGuid 16 /* GPT PTE: Partition unique GUID (16-byte) */
223 #define GPTE_FstLba 32 /* GPT PTE: First LBA (QWORD) */
224 #define GPTE_LstLba 40 /* GPT PTE: Last LBA inclusive (QWORD) */
225 #define GPTE_Flags 48 /* GPT PTE: Flags (QWORD) */
226 #define GPTE_Name 56 /* GPT PTE: Name */
227
228
229 /* Post process on fatal error in the file operations */
230 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
231
232
233 /* Re-entrancy related */
234 #if FF_FS_REENTRANT
235 #if FF_USE_LFN == 1
236 #error Static LFN work area cannot be used at thread-safe configuration
237 #endif
238 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
239 #else
240 #define LEAVE_FF(fs, res) return res
241 #endif
242
243
244 /* Definitions of logical drive - physical location conversion */
245 #if FF_MULTI_PARTITION
246 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */
247 #define LD2PT(vol) VolToPart[vol].pt /* Get partition index */
248 #else
249 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is associated with the same physical drive number */
250 #define LD2PT(vol) 0 /* Find first valid partition or in SFD */
251 #endif
252
253
254 /* Definitions of sector size */
255 #if (FF_MAX_SS < FF_MIN_SS) || (FF_MAX_SS != 512 && FF_MAX_SS != 1024 && FF_MAX_SS != 2048 && FF_MAX_SS != 4096) || (FF_MIN_SS != 512 && FF_MIN_SS != 1024 && FF_MIN_SS != 2048 && FF_MIN_SS != 4096)
256 #error Wrong sector size configuration
257 #endif
258 #if FF_MAX_SS == FF_MIN_SS
259 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
260 #else
261 #define SS(fs) ((fs)->ssize) /* Variable sector size */
262 #endif
263
264
265 /* Timestamp */
266 #if FF_FS_NORTC == 1
267 #if FF_NORTC_YEAR < 1980 || FF_NORTC_YEAR > 2107 || FF_NORTC_MON < 1 || FF_NORTC_MON > 12 || FF_NORTC_MDAY < 1 || FF_NORTC_MDAY > 31
268 #error Invalid FF_FS_NORTC settings
269 #endif
270 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
271 #else
272 #define GET_FATTIME() get_fattime()
273 #endif
274
275
276 /* File lock controls */
277 #if FF_FS_LOCK != 0
278 #if FF_FS_READONLY
279 #error FF_FS_LOCK must be 0 at read-only configuration
280 #endif
281 typedef struct {
282 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
283 DWORD clu; /* Object ID 2, containing directory (0:root) */
284 DWORD ofs; /* Object ID 3, offset in the directory */
285 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
286 } FILESEM;
287 #endif
288
289
290 /* SBCS up-case tables (\x80-\xFF) */
291 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
292 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
293 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
294 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
295 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
296 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
297 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
298 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
299 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
300 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
301 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
302 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
303 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
304 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
305 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
306 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
307 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
308 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
309 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
310 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
311 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
312 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
313 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
314 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
315 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
316 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
317 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
318 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
319 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
320 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
321 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
322 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
323 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
324 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
325 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
326 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
327 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
328 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
329 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
330 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
331 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
332 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
333 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
334 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
335 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
336 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
337 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
338 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
339 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
340 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
341 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
342 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
343 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
344 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
345 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
346 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
347 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
348 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
349 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
350 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
351 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
352 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
353 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
354 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
355 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
356 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
357 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
358 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
359 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
360 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
361 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
362 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
363 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
364 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
365 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
366 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
367 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
368 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
369 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
370 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
371 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
372 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
373 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
374 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
375 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
376 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
377 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
378 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
379 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
380 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
381 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
382 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
383 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
384 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
385 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
386 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
387 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
388 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
389 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
390 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
391 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
392 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
393 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
394 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
395 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
396 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
397 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
398 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
399 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
400 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
401 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
402 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
403 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
404 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
405 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
406 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
407 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
408 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
409 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
410 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
411 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
412 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
413 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
414 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
415 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
416 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
417 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
418 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
419 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
420 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
421 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
422 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
423 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
424 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
425 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
426 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
427
428
429 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */
430 /* <------> <------> <------> <------> <------> */
431 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}
432 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}
433 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}
434 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}
435
436
437 /* Macros for table definitions */
438 #define MERGE_2STR(a, b) a ## b
439 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)
440
441
442
443
444 /*--------------------------------------------------------------------------
445
446 Module Private Work Area
447
448 ---------------------------------------------------------------------------*/
449 /* Remark: Variables defined here without initial value shall be guaranteed
450 / zero/null at start-up. If not, the linker option or start-up routine is
451 / not compliance with C standard. */
452
453 /*--------------------------------*/
454 /* File/Volume controls */
455 /*--------------------------------*/
456
457 #if FF_VOLUMES < 1 || FF_VOLUMES > 10
458 #error Wrong FF_VOLUMES setting
459 #endif
460 static FATFS* FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */
461 static WORD Fsid; /* Filesystem mount ID */
462
463 #if FF_FS_RPATH != 0
464 static BYTE CurrVol; /* Current drive */
465 #endif
466
467 #if FF_FS_LOCK != 0
468 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
469 #endif
470
471 #if FF_STR_VOLUME_ID
472 #ifdef FF_VOLUME_STRS
473 static const char* const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS}; /* Pre-defined volume ID */
474 #endif
475 #endif
476
477 #if FF_LBA64
478 #if FF_MIN_GPT > 0x100000000
479 #error Wrong FF_MIN_GPT setting
480 #endif
481 static const BYTE GUID_MS_Basic[16] = {0xA2,0xA0,0xD0,0xEB,0xE5,0xB9,0x33,0x44,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7};
482 #endif
483
484
485
486 /*--------------------------------*/
487 /* LFN/Directory working buffer */
488 /*--------------------------------*/
489
490 #if FF_USE_LFN == 0 /* Non-LFN configuration */
491 #if FF_FS_EXFAT
492 #error LFN must be enabled when enable exFAT
493 #endif
494 #define DEF_NAMBUF
495 #define INIT_NAMBUF(fs)
496 #define FREE_NAMBUF()
497 #define LEAVE_MKFS(res) return res
498
499 #else /* LFN configurations */
500 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
501 #error Wrong setting of FF_MAX_LFN
502 #endif
503 #if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12
504 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF
505 #endif
506 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3
507 #error Wrong setting of FF_LFN_UNICODE
508 #endif
509 static const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* FAT: Offset of LFN characters in the directory entry */
510 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */
511
512 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */
513 #if FF_FS_EXFAT
514 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */
515 #endif
516 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */
517 #define DEF_NAMBUF
518 #define INIT_NAMBUF(fs)
519 #define FREE_NAMBUF()
520 #define LEAVE_MKFS(res) return res
521
522 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
523 #if FF_FS_EXFAT
524 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */
525 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
526 #define FREE_NAMBUF()
527 #else
528 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */
529 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
530 #define FREE_NAMBUF()
531 #endif
532 #define LEAVE_MKFS(res) return res
533
534 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
535 #if FF_FS_EXFAT
536 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */
537 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2 + MAXDIRB(FF_MAX_LFN)); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; (fs)->dirbuf = (BYTE*)(lfn+FF_MAX_LFN+1); }
538 #define FREE_NAMBUF() ff_memfree(lfn)
539 #else
540 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */
541 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
542 #define FREE_NAMBUF() ff_memfree(lfn)
543 #endif
544 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; }
545 #define MAX_MALLOC 0x8000 /* Must be >=FF_MAX_SS */
546
547 #else
548 #error Wrong setting of FF_USE_LFN
549
550 #endif /* FF_USE_LFN == 1 */
551 #endif /* FF_USE_LFN == 0 */
552
553
554
555 /*--------------------------------*/
556 /* Code conversion tables */
557 /*--------------------------------*/
558
559 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */
560 #define CODEPAGE CodePage
561 static WORD CodePage; /* Current code page */
562 static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */
563
564 static const BYTE Ct437[] = TBL_CT437;
565 static const BYTE Ct720[] = TBL_CT720;
566 static const BYTE Ct737[] = TBL_CT737;
567 static const BYTE Ct771[] = TBL_CT771;
568 static const BYTE Ct775[] = TBL_CT775;
569 static const BYTE Ct850[] = TBL_CT850;
570 static const BYTE Ct852[] = TBL_CT852;
571 static const BYTE Ct855[] = TBL_CT855;
572 static const BYTE Ct857[] = TBL_CT857;
573 static const BYTE Ct860[] = TBL_CT860;
574 static const BYTE Ct861[] = TBL_CT861;
575 static const BYTE Ct862[] = TBL_CT862;
576 static const BYTE Ct863[] = TBL_CT863;
577 static const BYTE Ct864[] = TBL_CT864;
578 static const BYTE Ct865[] = TBL_CT865;
579 static const BYTE Ct866[] = TBL_CT866;
580 static const BYTE Ct869[] = TBL_CT869;
581 static const BYTE Dc932[] = TBL_DC932;
582 static const BYTE Dc936[] = TBL_DC936;
583 static const BYTE Dc949[] = TBL_DC949;
584 static const BYTE Dc950[] = TBL_DC950;
585
586 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */
587 #define CODEPAGE FF_CODE_PAGE
588 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);
589
590 #else /* Static code page configuration (DBCS) */
591 #define CODEPAGE FF_CODE_PAGE
592 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);
593
594 #endif
595
596
597
598
599 /*--------------------------------------------------------------------------
600
601 Module Private Functions
602
603 ---------------------------------------------------------------------------*/
604
605
606 /*-----------------------------------------------------------------------*/
607 /* Load/Store multi-byte word in the FAT structure */
608 /*-----------------------------------------------------------------------*/
609
610 static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
611 {
612 WORD rv;
613
614 rv = ptr[1];
615 rv = rv << 8 | ptr[0];
616 return rv;
617 }
618
619 static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
620 {
621 DWORD rv;
622
623 rv = ptr[3];
624 rv = rv << 8 | ptr[2];
625 rv = rv << 8 | ptr[1];
626 rv = rv << 8 | ptr[0];
627 return rv;
628 }
629
630 #if FF_FS_EXFAT
631 static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
632 {
633 QWORD rv;
634
635 rv = ptr[7];
636 rv = rv << 8 | ptr[6];
637 rv = rv << 8 | ptr[5];
638 rv = rv << 8 | ptr[4];
639 rv = rv << 8 | ptr[3];
640 rv = rv << 8 | ptr[2];
641 rv = rv << 8 | ptr[1];
642 rv = rv << 8 | ptr[0];
643 return rv;
644 }
645 #endif
646
647 #if !FF_FS_READONLY
648 static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
649 {
650 *ptr++ = (BYTE)val; val >>= 8;
651 *ptr++ = (BYTE)val;
652 }
653
654 static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
655 {
656 *ptr++ = (BYTE)val; val >>= 8;
657 *ptr++ = (BYTE)val; val >>= 8;
658 *ptr++ = (BYTE)val; val >>= 8;
659 *ptr++ = (BYTE)val;
660 }
661
662 #if FF_FS_EXFAT
663 static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
664 {
665 *ptr++ = (BYTE)val; val >>= 8;
666 *ptr++ = (BYTE)val; val >>= 8;
667 *ptr++ = (BYTE)val; val >>= 8;
668 *ptr++ = (BYTE)val; val >>= 8;
669 *ptr++ = (BYTE)val; val >>= 8;
670 *ptr++ = (BYTE)val; val >>= 8;
671 *ptr++ = (BYTE)val; val >>= 8;
672 *ptr++ = (BYTE)val;
673 }
674 #endif
675 #endif /* !FF_FS_READONLY */
676
677
678
679 /*-----------------------------------------------------------------------*/
680 /* String functions */
681 /*-----------------------------------------------------------------------*/
682
683 /* Copy memory to memory */
684 static void mem_cpy (void* dst, const void* src, UINT cnt)
685 {
686 BYTE *d = (BYTE*)dst;
687 const BYTE *s = (const BYTE*)src;
688
689 if (cnt != 0) {
690 do {
691 *d++ = *s++;
692 } while (--cnt);
693 }
694 }
695
696
697 /* Fill memory block */
698 static void mem_set (void* dst, int val, UINT cnt)
699 {
700 BYTE *d = (BYTE*)dst;
701
702 do {
703 *d++ = (BYTE)val;
704 } while (--cnt);
705 }
706
707
708 /* Compare memory block */
709 static int mem_cmp (const void* dst, const void* src, UINT cnt) /* ZR:same, NZ:different */
710 {
711 const BYTE *d = (const BYTE *)dst, *s = (const BYTE *)src;
712 int r = 0;
713
714 do {
715 r = *d++ - *s++;
716 } while (--cnt && r == 0);
717
718 return r;
719 }
720
721
722 /* Check if chr is contained in the string */
723 static int chk_chr (const char* str, int chr) /* NZ:contained, ZR:not contained */
724 {
725 while (*str && *str != chr) str++;
726 return *str;
727 }
728
729
730 /* Test if the byte is DBC 1st byte */
731 static int dbc_1st (BYTE c)
732 {
733 #if FF_CODE_PAGE == 0 /* Variable code page */
734 if (DbcTbl && c >= DbcTbl[0]) {
735 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */
736 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */
737 }
738 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
739 if (c >= DbcTbl[0]) {
740 if (c <= DbcTbl[1]) return 1;
741 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;
742 }
743 #else /* SBCS fixed code page */
744 if (c != 0) return 0; /* Always false */
745 #endif
746 return 0;
747 }
748
749
750 /* Test if the byte is DBC 2nd byte */
751 static int dbc_2nd (BYTE c)
752 {
753 #if FF_CODE_PAGE == 0 /* Variable code page */
754 if (DbcTbl && c >= DbcTbl[4]) {
755 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */
756 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */
757 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */
758 }
759 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
760 if (c >= DbcTbl[4]) {
761 if (c <= DbcTbl[5]) return 1;
762 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;
763 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;
764 }
765 #else /* SBCS fixed code page */
766 if (c != 0) return 0; /* Always false */
767 #endif
768 return 0;
769 }
770
771
772 #if FF_USE_LFN
773
774 /* Get a Unicode code point from the TCHAR string in defined API encodeing */
775 static DWORD tchar2uni ( /* Returns a character in UTF-16 encoding (>=0x10000 on surrogate pair, 0xFFFFFFFF on decode error) */
776 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */
777 )
778 {
779 DWORD uc;
780 const TCHAR *p = *str;
781
782 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
783 WCHAR wc;
784
785 uc = *p++; /* Get a unit */
786 if (IsSurrogate(uc)) { /* Surrogate? */
787 wc = *p++; /* Get low surrogate */
788 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */
789 uc = uc << 16 | wc;
790 }
791
792 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
793 BYTE b;
794 int nf;
795
796 uc = (BYTE)*p++; /* Get an encoding unit */
797 if (uc & 0x80) { /* Multiple byte code? */
798 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */
799 uc &= 0x1F; nf = 1;
800 } else {
801 if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */
802 uc &= 0x0F; nf = 2;
803 } else {
804 if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */
805 uc &= 0x07; nf = 3;
806 } else { /* Wrong sequence */
807 return 0xFFFFFFFF;
808 }
809 }
810 }
811 do { /* Get trailing bytes */
812 b = (BYTE)*p++;
813 if ((b & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */
814 uc = uc << 6 | (b & 0x3F);
815 } while (--nf != 0);
816 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */
817 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
818 }
819
820 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
821 uc = (TCHAR)*p++; /* Get a unit */
822 if (uc >= 0x110000 || IsSurrogate(uc)) return 0xFFFFFFFF; /* Wrong code? */
823 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
824
825 #else /* ANSI/OEM input */
826 BYTE b;
827 WCHAR wc;
828
829 wc = (BYTE)*p++; /* Get a byte */
830 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */
831 b = (BYTE)*p++; /* Get 2nd byte */
832 if (!dbc_2nd(b)) return 0xFFFFFFFF; /* Invalid code? */
833 wc = (wc << 8) + b; /* Make a DBC */
834 }
835 if (wc != 0) {
836 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */
837 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */
838 }
839 uc = wc;
840
841 #endif
842 *str = p; /* Next read pointer */
843 return uc;
844 }
845
846
847 /* Output a TCHAR string in defined API encoding */
848 static BYTE put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */
849 DWORD chr, /* UTF-16 encoded character (Surrogate pair if >=0x10000) */
850 TCHAR* buf, /* Output buffer */
851 UINT szb /* Size of the buffer */
852 )
853 {
854 #if FF_LFN_UNICODE == 1 /* UTF-16 output */
855 WCHAR hs, wc;
856
857 hs = (WCHAR)(chr >> 16);
858 wc = (WCHAR)chr;
859 if (hs == 0) { /* Single encoding unit? */
860 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */
861 *buf = wc;
862 return 1;
863 }
864 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */
865 *buf++ = hs;
866 *buf++ = wc;
867 return 2;
868
869 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */
870 DWORD hc;
871
872 if (chr < 0x80) { /* Single byte code? */
873 if (szb < 1) return 0; /* Buffer overflow? */
874 *buf = (TCHAR)chr;
875 return 1;
876 }
877 if (chr < 0x800) { /* 2-byte sequence? */
878 if (szb < 2) return 0; /* Buffer overflow? */
879 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F));
880 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
881 return 2;
882 }
883 if (chr < 0x10000) { /* 3-byte sequence? */
884 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */
885 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F));
886 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
887 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
888 return 3;
889 }
890 /* 4-byte sequence */
891 if (szb < 4) return 0; /* Buffer overflow? */
892 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
893 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
894 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
895 chr = (hc | chr) + 0x10000;
896 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07));
897 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F));
898 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
899 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
900 return 4;
901
902 #elif FF_LFN_UNICODE == 3 /* UTF-32 output */
903 DWORD hc;
904
905 if (szb < 1) return 0; /* Buffer overflow? */
906 if (chr >= 0x10000) { /* Out of BMP? */
907 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
908 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
909 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
910 chr = (hc | chr) + 0x10000;
911 }
912 *buf++ = (TCHAR)chr;
913 return 1;
914
915 #else /* ANSI/OEM output */
916 WCHAR wc;
917
918 wc = ff_uni2oem(chr, CODEPAGE);
919 if (wc >= 0x100) { /* Is this a DBC? */
920 if (szb < 2) return 0;
921 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */
922 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */
923 return 2;
924 }
925 if (wc == 0 || szb < 1) return 0; /* Invalid char or buffer overflow? */
926 *buf++ = (TCHAR)wc; /* Store the character */
927 return 1;
928 #endif
929 }
930 #endif /* FF_USE_LFN */
931
932
933 #if FF_FS_REENTRANT
934 /*-----------------------------------------------------------------------*/
935 /* Request/Release grant to access the volume */
936 /*-----------------------------------------------------------------------*/
937 static int lock_fs ( /* 1:Ok, 0:timeout */
938 FATFS* fs /* Filesystem object */
939 )
940 {
941 return ff_req_grant(fs->sobj);
942 }
943
944
945 static void unlock_fs (
946 FATFS* fs, /* Filesystem object */
947 FRESULT res /* Result code to be returned */
948 )
949 {
950 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
951 ff_rel_grant(fs->sobj);
952 }
953 }
954
955 #endif
956
957
958
959 #if FF_FS_LOCK != 0
960 /*-----------------------------------------------------------------------*/
961 /* File lock control functions */
962 /*-----------------------------------------------------------------------*/
963
964 static FRESULT chk_lock ( /* Check if the file can be accessed */
965 DIR* dp, /* Directory object pointing the file to be checked */
966 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */
967 )
968 {
969 UINT i, be;
970
971 /* Search open object table for the object */
972 be = 0;
973 for (i = 0; i < FF_FS_LOCK; i++) {
974 if (Files[i].fs) { /* Existing entry */
975 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */
976 Files[i].clu == dp->obj.sclust &&
977 Files[i].ofs == dp->dptr) break;
978 } else { /* Blank entry */
979 be = 1;
980 }
981 }
982 if (i == FF_FS_LOCK) { /* The object has not been opened */
983 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */
984 }
985
986 /* The object was opened. Reject any open against writing file and all write mode open */
987 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
988 }
989
990
991 static int enq_lock (void) /* Check if an entry is available for a new object */
992 {
993 UINT i;
994
995 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
996 return (i == FF_FS_LOCK) ? 0 : 1;
997 }
998
999
1000 static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
1001 DIR* dp, /* Directory object pointing the file to register or increment */
1002 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
1003 )
1004 {
1005 UINT i;
1006
1007
1008 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
1009 if (Files[i].fs == dp->obj.fs
1010 && Files[i].clu == dp->obj.sclust
1011 && Files[i].ofs == dp->dptr) break;
1012 }
1013
1014 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
1015 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
1016 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
1017 Files[i].fs = dp->obj.fs;
1018 Files[i].clu = dp->obj.sclust;
1019 Files[i].ofs = dp->dptr;
1020 Files[i].ctr = 0;
1021 }
1022
1023 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */
1024
1025 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
1026
1027 return i + 1; /* Index number origin from 1 */
1028 }
1029
1030
1031 static FRESULT dec_lock ( /* Decrement object open counter */
1032 UINT i /* Semaphore index (1..) */
1033 )
1034 {
1035 WORD n;
1036 FRESULT res;
1037
1038
1039 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */
1040 n = Files[i].ctr;
1041 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
1042 if (n > 0) n--; /* Decrement read mode open count */
1043 Files[i].ctr = n;
1044 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */
1045 res = FR_OK;
1046 } else {
1047 res = FR_INT_ERR; /* Invalid index nunber */
1048 }
1049 return res;
1050 }
1051
1052
1053 static void clear_lock ( /* Clear lock entries of the volume */
1054 FATFS *fs
1055 )
1056 {
1057 UINT i;
1058
1059 for (i = 0; i < FF_FS_LOCK; i++) {
1060 if (Files[i].fs == fs) Files[i].fs = 0;
1061 }
1062 }
1063
1064 #endif /* FF_FS_LOCK != 0 */
1065
1066
1067
1068 /*-----------------------------------------------------------------------*/
1069 /* Move/Flush disk access window in the filesystem object */
1070 /*-----------------------------------------------------------------------*/
1071 #if !FF_FS_READONLY
1072 static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */
1073 FATFS* fs /* Filesystem object */
1074 )
1075 {
1076 FRESULT res = FR_OK;
1077
1078
1079 if (fs->wflag) { /* Is the disk access window dirty? */
1080 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write it back into the volume */
1081 fs->wflag = 0; /* Clear window dirty flag */
1082 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */
1083 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */
1084 }
1085 } else {
1086 res = FR_DISK_ERR;
1087 }
1088 }
1089 return res;
1090 }
1091 #endif
1092
1093
1094 static FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */
1095 FATFS* fs, /* Filesystem object */
1096 LBA_t sect /* Sector LBA to make appearance in the fs->win[] */
1097 )
1098 {
1099 FRESULT res = FR_OK;
1100
1101
1102 if (sect != fs->winsect) { /* Window offset changed? */
1103 #if !FF_FS_READONLY
1104 res = sync_window(fs); /* Flush the window */
1105 #endif
1106 if (res == FR_OK) { /* Fill sector window with new data */
1107 if (disk_read(fs->pdrv, fs->win, sect, 1) != RES_OK) {
1108 sect = (LBA_t)0 - 1; /* Invalidate window if read data is not valid */
1109 res = FR_DISK_ERR;
1110 }
1111 fs->winsect = sect;
1112 }
1113 }
1114 return res;
1115 }
1116
1117
1118
1119
1120 #if !FF_FS_READONLY
1121 /*-----------------------------------------------------------------------*/
1122 /* Synchronize filesystem and data on the storage */
1123 /*-----------------------------------------------------------------------*/
1124
1125 static FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */
1126 FATFS* fs /* Filesystem object */
1127 )
1128 {
1129 FRESULT res;
1130
1131
1132 res = sync_window(fs);
1133 if (res == FR_OK) {
1134 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */
1135 /* Create FSInfo structure */
1136 mem_set(fs->win, 0, sizeof fs->win);
1137 st_word(fs->win + BS_55AA, 0xAA55);
1138 st_dword(fs->win + FSI_LeadSig, 0x41615252);
1139 st_dword(fs->win + FSI_StrucSig, 0x61417272);
1140 st_dword(fs->win + FSI_Free_Count, fs->free_clst);
1141 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst);
1142 /* Write it into the FSInfo sector */
1143 fs->winsect = fs->volbase + 1;
1144 disk_write(fs->pdrv, fs->win, fs->winsect, 1);
1145 fs->fsi_flag = 0;
1146 }
1147 /* Make sure that no pending write process in the lower layer */
1148 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
1149 }
1150
1151 return res;
1152 }
1153
1154 #endif
1155
1156
1157
1158 /*-----------------------------------------------------------------------*/
1159 /* Get physical sector number from cluster number */
1160 /*-----------------------------------------------------------------------*/
1161
1162 static LBA_t clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
1163 FATFS* fs, /* Filesystem object */
1164 DWORD clst /* Cluster# to be converted */
1165 )
1166 {
1167 clst -= 2; /* Cluster number is origin from 2 */
1168 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */
1169 return fs->database + (LBA_t)fs->csize * clst; /* Start sector number of the cluster */
1170 }
1171
1172
1173
1174
1175 /*-----------------------------------------------------------------------*/
1176 /* FAT access - Read value of a FAT entry */
1177 /*-----------------------------------------------------------------------*/
1178
1179 static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
1180 FFOBJID* obj, /* Corresponding object */
1181 DWORD clst /* Cluster number to get the value */
1182 )
1183 {
1184 UINT wc, bc;
1185 DWORD val;
1186 FATFS *fs = obj->fs;
1187
1188
1189 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
1190 val = 1; /* Internal error */
1191
1192 } else {
1193 val = 0xFFFFFFFF; /* Default value falls on disk error */
1194
1195 switch (fs->fs_type) {
1196 case FS_FAT12 :
1197 bc = (UINT)clst; bc += bc / 2;
1198 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1199 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */
1200 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1201 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */
1202 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */
1203 break;
1204
1205 case FS_FAT16 :
1206 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
1207 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */
1208 break;
1209
1210 case FS_FAT32 :
1211 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1212 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */
1213 break;
1214 #if FF_FS_EXFAT
1215 case FS_EXFAT :
1216 if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) { /* Object except root dir must have valid data length */
1217 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
1218 DWORD clen = (DWORD)((LBA_t)((obj->objsize - 1) / SS(fs)) / fs->csize); /* Number of clusters - 1 */
1219
1220 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */
1221 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */
1222 break;
1223 }
1224 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */
1225 val = clst + 1; /* Generate the value */
1226 break;
1227 }
1228 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
1229 if (obj->n_frag != 0) { /* Is it on the growing edge? */
1230 val = 0x7FFFFFFF; /* Generate EOC */
1231 } else {
1232 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1233 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
1234 }
1235 break;
1236 }
1237 }
1238 /* go to default */
1239 #endif
1240 default:
1241 val = 1; /* Internal error */
1242 }
1243 }
1244
1245 return val;
1246 }
1247
1248
1249
1250
1251 #if !FF_FS_READONLY
1252 /*-----------------------------------------------------------------------*/
1253 /* FAT access - Change value of a FAT entry */
1254 /*-----------------------------------------------------------------------*/
1255
1256 static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
1257 FATFS* fs, /* Corresponding filesystem object */
1258 DWORD clst, /* FAT index number (cluster number) to be changed */
1259 DWORD val /* New value to be set to the entry */
1260 )
1261 {
1262 UINT bc;
1263 BYTE *p;
1264 FRESULT res = FR_INT_ERR;
1265
1266
1267 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
1268 switch (fs->fs_type) {
1269 case FS_FAT12 :
1270 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */
1271 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1272 if (res != FR_OK) break;
1273 p = fs->win + bc++ % SS(fs);
1274 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Update 1st byte */
1275 fs->wflag = 1;
1276 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1277 if (res != FR_OK) break;
1278 p = fs->win + bc % SS(fs);
1279 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Update 2nd byte */
1280 fs->wflag = 1;
1281 break;
1282
1283 case FS_FAT16 :
1284 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
1285 if (res != FR_OK) break;
1286 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */
1287 fs->wflag = 1;
1288 break;
1289
1290 case FS_FAT32 :
1291 #if FF_FS_EXFAT
1292 case FS_EXFAT :
1293 #endif
1294 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1295 if (res != FR_OK) break;
1296 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1297 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
1298 }
1299 st_dword(fs->win + clst * 4 % SS(fs), val);
1300 fs->wflag = 1;
1301 break;
1302 }
1303 }
1304 return res;
1305 }
1306
1307 #endif /* !FF_FS_READONLY */
1308
1309
1310
1311
1312 #if FF_FS_EXFAT && !FF_FS_READONLY
1313 /*-----------------------------------------------------------------------*/
1314 /* exFAT: Accessing FAT and Allocation Bitmap */
1315 /*-----------------------------------------------------------------------*/
1316
1317 /*--------------------------------------*/
1318 /* Find a contiguous free cluster block */
1319 /*--------------------------------------*/
1320
1321 static DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
1322 FATFS* fs, /* Filesystem object */
1323 DWORD clst, /* Cluster number to scan from */
1324 DWORD ncl /* Number of contiguous clusters to find (1..) */
1325 )
1326 {
1327 BYTE bm, bv;
1328 UINT i;
1329 DWORD val, scl, ctr;
1330
1331
1332 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
1333 if (clst >= fs->n_fatent - 2) clst = 0;
1334 scl = val = clst; ctr = 0;
1335 for (;;) {
1336 if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;
1337 i = val / 8 % SS(fs); bm = 1 << (val % 8);
1338 do {
1339 do {
1340 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
1341 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
1342 val = 0; bm = 0; i = SS(fs);
1343 }
1344 if (bv == 0) { /* Is it a free cluster? */
1345 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */
1346 } else {
1347 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */
1348 }
1349 if (val == clst) return 0; /* All cluster scanned? */
1350 } while (bm != 0);
1351 bm = 1;
1352 } while (++i < SS(fs));
1353 }
1354 }
1355
1356
1357 /*----------------------------------------*/
1358 /* Set/Clear a block of allocation bitmap */
1359 /*----------------------------------------*/
1360
1361 static FRESULT change_bitmap (
1362 FATFS* fs, /* Filesystem object */
1363 DWORD clst, /* Cluster number to change from */
1364 DWORD ncl, /* Number of clusters to be changed */
1365 int bv /* bit value to be set (0 or 1) */
1366 )
1367 {
1368 BYTE bm;
1369 UINT i;
1370 LBA_t sect;
1371
1372
1373 clst -= 2; /* The first bit corresponds to cluster #2 */
1374 sect = fs->bitbase + clst / 8 / SS(fs); /* Sector address */
1375 i = clst / 8 % SS(fs); /* Byte offset in the sector */
1376 bm = 1 << (clst % 8); /* Bit mask in the byte */
1377 for (;;) {
1378 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
1379 do {
1380 do {
1381 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
1382 fs->win[i] ^= bm; /* Flip the bit */
1383 fs->wflag = 1;
1384 if (--ncl == 0) return FR_OK; /* All bits processed? */
1385 } while (bm <<= 1); /* Next bit */
1386 bm = 1;
1387 } while (++i < SS(fs)); /* Next byte */
1388 i = 0;
1389 }
1390 }
1391
1392
1393 /*---------------------------------------------*/
1394 /* Fill the first fragment of the FAT chain */
1395 /*---------------------------------------------*/
1396
1397 static FRESULT fill_first_frag (
1398 FFOBJID* obj /* Pointer to the corresponding object */
1399 )
1400 {
1401 FRESULT res;
1402 DWORD cl, n;
1403
1404
1405 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */
1406 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
1407 res = put_fat(obj->fs, cl, cl + 1);
1408 if (res != FR_OK) return res;
1409 }
1410 obj->stat = 0; /* Change status 'FAT chain is valid' */
1411 }
1412 return FR_OK;
1413 }
1414
1415
1416 /*---------------------------------------------*/
1417 /* Fill the last fragment of the FAT chain */
1418 /*---------------------------------------------*/
1419
1420 static FRESULT fill_last_frag (
1421 FFOBJID* obj, /* Pointer to the corresponding object */
1422 DWORD lcl, /* Last cluster of the fragment */
1423 DWORD term /* Value to set the last FAT entry */
1424 )
1425 {
1426 FRESULT res;
1427
1428
1429 while (obj->n_frag > 0) { /* Create the chain of last fragment */
1430 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);
1431 if (res != FR_OK) return res;
1432 obj->n_frag--;
1433 }
1434 return FR_OK;
1435 }
1436
1437 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */
1438
1439
1440
1441 #if !FF_FS_READONLY
1442 /*-----------------------------------------------------------------------*/
1443 /* FAT handling - Remove a cluster chain */
1444 /*-----------------------------------------------------------------------*/
1445
1446 static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1447 FFOBJID* obj, /* Corresponding object */
1448 DWORD clst, /* Cluster to remove a chain from */
1449 DWORD pclst /* Previous cluster of clst (0 if entire chain) */
1450 )
1451 {
1452 FRESULT res = FR_OK;
1453 DWORD nxt;
1454 FATFS *fs = obj->fs;
1455 #if FF_FS_EXFAT || FF_USE_TRIM
1456 DWORD scl = clst, ecl = clst;
1457 #endif
1458 #if FF_USE_TRIM
1459 LBA_t rt[2];
1460 #endif
1461
1462 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
1463
1464 /* Mark the previous cluster 'EOC' on the FAT if it exists */
1465 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
1466 res = put_fat(fs, pclst, 0xFFFFFFFF);
1467 if (res != FR_OK) return res;
1468 }
1469
1470 /* Remove the chain */
1471 do {
1472 nxt = get_fat(obj, clst); /* Get cluster status */
1473 if (nxt == 0) break; /* Empty cluster? */
1474 if (nxt == 1) return FR_INT_ERR; /* Internal error? */
1475 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
1476 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1477 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
1478 if (res != FR_OK) return res;
1479 }
1480 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
1481 fs->free_clst++;
1482 fs->fsi_flag |= 1;
1483 }
1484 #if FF_FS_EXFAT || FF_USE_TRIM
1485 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1486 ecl = nxt;
1487 } else { /* End of contiguous cluster block */
1488 #if FF_FS_EXFAT
1489 if (fs->fs_type == FS_EXFAT) {
1490 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
1491 if (res != FR_OK) return res;
1492 }
1493 #endif
1494 #if FF_USE_TRIM
1495 rt[0] = clst2sect(fs, scl); /* Start of data area to be freed */
1496 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area to be freed */
1497 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform storage device that the data in the block may be erased */
1498 #endif
1499 scl = ecl = nxt;
1500 }
1501 #endif
1502 clst = nxt; /* Next cluster */
1503 } while (clst < fs->n_fatent); /* Repeat while not the last link */
1504
1505 #if FF_FS_EXFAT
1506 /* Some post processes for chain status */
1507 if (fs->fs_type == FS_EXFAT) {
1508 if (pclst == 0) { /* Has the entire chain been removed? */
1509 obj->stat = 0; /* Change the chain status 'initial' */
1510 } else {
1511 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */
1512 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */
1513 while (clst != pclst) {
1514 nxt = get_fat(obj, clst);
1515 if (nxt < 2) return FR_INT_ERR;
1516 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;
1517 if (nxt != clst + 1) break; /* Not contiguous? */
1518 clst++;
1519 }
1520 if (clst == pclst) { /* Has the chain got contiguous again? */
1521 obj->stat = 2; /* Change the chain status 'contiguous' */
1522 }
1523 } else {
1524 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */
1525 obj->stat = 2; /* Change the chain status 'contiguous' */
1526 }
1527 }
1528 }
1529 }
1530 #endif
1531 return FR_OK;
1532 }
1533
1534
1535
1536
1537 /*-----------------------------------------------------------------------*/
1538 /* FAT handling - Stretch a chain or Create a new chain */
1539 /*-----------------------------------------------------------------------*/
1540
1541 static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1542 FFOBJID* obj, /* Corresponding object */
1543 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1544 )
1545 {
1546 DWORD cs, ncl, scl;
1547 FRESULT res;
1548 FATFS *fs = obj->fs;
1549
1550
1551 if (clst == 0) { /* Create a new chain */
1552 scl = fs->last_clst; /* Suggested cluster to start to find */
1553 if (scl == 0 || scl >= fs->n_fatent) scl = 1;
1554 }
1555 else { /* Stretch a chain */
1556 cs = get_fat(obj, clst); /* Check the cluster status */
1557 if (cs < 2) return 1; /* Test for insanity */
1558 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */
1559 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1560 scl = clst; /* Cluster to start to find */
1561 }
1562 if (fs->free_clst == 0) return 0; /* No free cluster */
1563
1564 #if FF_FS_EXFAT
1565 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
1566 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
1567 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
1568 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
1569 if (res == FR_INT_ERR) return 1;
1570 if (res == FR_DISK_ERR) return 0xFFFFFFFF;
1571 if (clst == 0) { /* Is it a new chain? */
1572 obj->stat = 2; /* Set status 'contiguous' */
1573 } else { /* It is a stretched chain */
1574 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
1575 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
1576 obj->stat = 3; /* Change status 'just fragmented' */
1577 }
1578 }
1579 if (obj->stat != 2) { /* Is the file non-contiguous? */
1580 if (ncl == clst + 1) { /* Is the cluster next to previous one? */
1581 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */
1582 } else { /* New fragment */
1583 if (obj->n_frag == 0) obj->n_frag = 1;
1584 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */
1585 if (res == FR_OK) obj->n_frag = 1;
1586 }
1587 }
1588 } else
1589 #endif
1590 { /* On the FAT/FAT32 volume */
1591 ncl = 0;
1592 if (scl == clst) { /* Stretching an existing chain? */
1593 ncl = scl + 1; /* Test if next cluster is free */
1594 if (ncl >= fs->n_fatent) ncl = 2;
1595 cs = get_fat(obj, ncl); /* Get next cluster status */
1596 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1597 if (cs != 0) { /* Not free? */
1598 cs = fs->last_clst; /* Start at suggested cluster if it is valid */
1599 if (cs >= 2 && cs < fs->n_fatent) scl = cs;
1600 ncl = 0;
1601 }
1602 }
1603 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */
1604 ncl = scl; /* Start cluster */
1605 for (;;) {
1606 ncl++; /* Next cluster */
1607 if (ncl >= fs->n_fatent) { /* Check wrap-around */
1608 ncl = 2;
1609 if (ncl > scl) return 0; /* No free cluster found? */
1610 }
1611 cs = get_fat(obj, ncl); /* Get the cluster status */
1612 if (cs == 0) break; /* Found a free cluster? */
1613 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1614 if (ncl == scl) return 0; /* No free cluster found? */
1615 }
1616 }
1617 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
1618 if (res == FR_OK && clst != 0) {
1619 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
1620 }
1621 }
1622
1623 if (res == FR_OK) { /* Update FSINFO if function succeeded. */
1624 fs->last_clst = ncl;
1625 if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--;
1626 fs->fsi_flag |= 1;
1627 } else {
1628 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */
1629 }
1630
1631 return ncl; /* Return new cluster number or error status */
1632 }
1633
1634 #endif /* !FF_FS_READONLY */
1635
1636
1637
1638
1639 #if FF_USE_FASTSEEK
1640 /*-----------------------------------------------------------------------*/
1641 /* FAT handling - Convert offset into cluster with link map table */
1642 /*-----------------------------------------------------------------------*/
1643
1644 static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1645 FIL* fp, /* Pointer to the file object */
1646 FSIZE_t ofs /* File offset to be converted to cluster# */
1647 )
1648 {
1649 DWORD cl, ncl, *tbl;
1650 FATFS *fs = fp->obj.fs;
1651
1652
1653 tbl = fp->cltbl + 1; /* Top of CLMT */
1654 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
1655 for (;;) {
1656 ncl = *tbl++; /* Number of cluters in the fragment */
1657 if (ncl == 0) return 0; /* End of table? (error) */
1658 if (cl < ncl) break; /* In this fragment? */
1659 cl -= ncl; tbl++; /* Next fragment */
1660 }
1661 return cl + *tbl; /* Return the cluster number */
1662 }
1663
1664 #endif /* FF_USE_FASTSEEK */
1665
1666
1667
1668
1669 /*-----------------------------------------------------------------------*/
1670 /* Directory handling - Fill a cluster with zeros */
1671 /*-----------------------------------------------------------------------*/
1672
1673 #if !FF_FS_READONLY
1674 static FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */
1675 FATFS *fs, /* Filesystem object */
1676 DWORD clst /* Directory table to clear */
1677 )
1678 {
1679 LBA_t sect;
1680 UINT n, szb;
1681 BYTE *ibuf;
1682
1683
1684 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
1685 sect = clst2sect(fs, clst); /* Top of the cluster */
1686 fs->winsect = sect; /* Set window to top of the cluster */
1687 mem_set(fs->win, 0, sizeof fs->win); /* Clear window buffer */
1688 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */
1689 /* Allocate a temporary buffer */
1690 for (szb = ((DWORD)fs->csize * SS(fs) >= MAX_MALLOC) ? MAX_MALLOC : fs->csize * SS(fs), ibuf = 0; szb > SS(fs) && (ibuf = ff_memalloc(szb)) == 0; szb /= 2) ;
1691 if (szb > SS(fs)) { /* Buffer allocated? */
1692 mem_set(ibuf, 0, szb);
1693 szb /= SS(fs); /* Bytes -> Sectors */
1694 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1695 ff_memfree(ibuf);
1696 } else
1697 #endif
1698 {
1699 ibuf = fs->win; szb = 1; /* Use window buffer (many single-sector writes may take a time) */
1700 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1701 }
1702 return (n == fs->csize) ? FR_OK : FR_DISK_ERR;
1703 }
1704 #endif /* !FF_FS_READONLY */
1705
1706
1707
1708
1709 /*-----------------------------------------------------------------------*/
1710 /* Directory handling - Set directory index */
1711 /*-----------------------------------------------------------------------*/
1712
1713 static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1714 DIR* dp, /* Pointer to directory object */
1715 DWORD ofs /* Offset of directory table */
1716 )
1717 {
1718 DWORD csz, clst;
1719 FATFS *fs = dp->obj.fs;
1720
1721
1722 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
1723 return FR_INT_ERR;
1724 }
1725 dp->dptr = ofs; /* Set current offset */
1726 clst = dp->obj.sclust; /* Table start cluster (0:root) */
1727 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
1728 clst = (DWORD)fs->dirbase;
1729 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
1730 }
1731
1732 if (clst == 0) { /* Static table (root-directory on the FAT volume) */
1733 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
1734 dp->sect = fs->dirbase;
1735
1736 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */
1737 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
1738 while (ofs >= csz) { /* Follow cluster chain */
1739 clst = get_fat(&dp->obj, clst); /* Get next cluster */
1740 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1741 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
1742 ofs -= csz;
1743 }
1744 dp->sect = clst2sect(fs, clst);
1745 }
1746 dp->clust = clst; /* Current cluster# */
1747 if (dp->sect == 0) return FR_INT_ERR;
1748 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
1749 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
1750
1751 return FR_OK;
1752 }
1753
1754
1755
1756
1757 /*-----------------------------------------------------------------------*/
1758 /* Directory handling - Move directory table index next */
1759 /*-----------------------------------------------------------------------*/
1760
1761 static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1762 DIR* dp, /* Pointer to the directory object */
1763 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1764 )
1765 {
1766 DWORD ofs, clst;
1767 FATFS *fs = dp->obj.fs;
1768
1769
1770 ofs = dp->dptr + SZDIRE; /* Next entry */
1771 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR)) dp->sect = 0; /* Disable it if the offset reached the max value */
1772 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */
1773
1774 if (ofs % SS(fs) == 0) { /* Sector changed? */
1775 dp->sect++; /* Next sector */
1776
1777 if (dp->clust == 0) { /* Static table */
1778 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
1779 dp->sect = 0; return FR_NO_FILE;
1780 }
1781 }
1782 else { /* Dynamic table */
1783 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
1784 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
1785 if (clst <= 1) return FR_INT_ERR; /* Internal error */
1786 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1787 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */
1788 #if !FF_FS_READONLY
1789 if (!stretch) { /* If no stretch, report EOT */
1790 dp->sect = 0; return FR_NO_FILE;
1791 }
1792 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
1793 if (clst == 0) return FR_DENIED; /* No free cluster */
1794 if (clst == 1) return FR_INT_ERR; /* Internal error */
1795 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1796 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */
1797 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */
1798 #else
1799 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */
1800 dp->sect = 0; return FR_NO_FILE; /* Report EOT */
1801 #endif
1802 }
1803 dp->clust = clst; /* Initialize data for new cluster */
1804 dp->sect = clst2sect(fs, clst);
1805 }
1806 }
1807 }
1808 dp->dptr = ofs; /* Current entry */
1809 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
1810
1811 return FR_OK;
1812 }
1813
1814
1815
1816
1817 #if !FF_FS_READONLY
1818 /*-----------------------------------------------------------------------*/
1819 /* Directory handling - Reserve a block of directory entries */
1820 /*-----------------------------------------------------------------------*/
1821
1822 static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1823 DIR* dp, /* Pointer to the directory object */
1824 UINT nent /* Number of contiguous entries to allocate */
1825 )
1826 {
1827 FRESULT res;
1828 UINT n;
1829 FATFS *fs = dp->obj.fs;
1830
1831
1832 res = dir_sdi(dp, 0);
1833 if (res == FR_OK) {
1834 n = 0;
1835 do {
1836 res = move_window(fs, dp->sect);
1837 if (res != FR_OK) break;
1838 #if FF_FS_EXFAT
1839 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) {
1840 #else
1841 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) {
1842 #endif
1843 if (++n == nent) break; /* A block of contiguous free entries is found */
1844 } else {
1845 n = 0; /* Not a blank entry. Restart to search */
1846 }
1847 res = dir_next(dp, 1);
1848 } while (res == FR_OK); /* Next entry with table stretch enabled */
1849 }
1850
1851 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1852 return res;
1853 }
1854
1855 #endif /* !FF_FS_READONLY */
1856
1857
1858
1859
1860 /*-----------------------------------------------------------------------*/
1861 /* FAT: Directory handling - Load/Store start cluster number */
1862 /*-----------------------------------------------------------------------*/
1863
1864 static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1865 FATFS* fs, /* Pointer to the fs object */
1866 const BYTE* dir /* Pointer to the key entry */
1867 )
1868 {
1869 DWORD cl;
1870
1871 cl = ld_word(dir + DIR_FstClusLO);
1872 if (fs->fs_type == FS_FAT32) {
1873 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
1874 }
1875
1876 return cl;
1877 }
1878
1879
1880 #if !FF_FS_READONLY
1881 static void st_clust (
1882 FATFS* fs, /* Pointer to the fs object */
1883 BYTE* dir, /* Pointer to the key entry */
1884 DWORD cl /* Value to be set */
1885 )
1886 {
1887 st_word(dir + DIR_FstClusLO, (WORD)cl);
1888 if (fs->fs_type == FS_FAT32) {
1889 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
1890 }
1891 }
1892 #endif
1893
1894
1895
1896 #if FF_USE_LFN
1897 /*--------------------------------------------------------*/
1898 /* FAT-LFN: Compare a part of file name with an LFN entry */
1899 /*--------------------------------------------------------*/
1900
1901 static int cmp_lfn ( /* 1:matched, 0:not matched */
1902 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1903 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1904 )
1905 {
1906 UINT i, s;
1907 WCHAR wc, uc;
1908
1909
1910 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1911
1912 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1913
1914 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1915 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1916 if (wc != 0) {
1917 if (i >= FF_MAX_LFN + 1 || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
1918 return 0; /* Not matched */
1919 }
1920 wc = uc;
1921 } else {
1922 if (uc != 0xFFFF) return 0; /* Check filler */
1923 }
1924 }
1925
1926 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
1927
1928 return 1; /* The part of LFN matched */
1929 }
1930
1931
1932 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
1933 /*-----------------------------------------------------*/
1934 /* FAT-LFN: Pick a part of file name from an LFN entry */
1935 /*-----------------------------------------------------*/
1936
1937 static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1938 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1939 BYTE* dir /* Pointer to the LFN entry */
1940 )
1941 {
1942 UINT i, s;
1943 WCHAR wc, uc;
1944
1945
1946 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */
1947
1948 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */
1949
1950 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1951 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1952 if (wc != 0) {
1953 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1954 lfnbuf[i++] = wc = uc; /* Store it */
1955 } else {
1956 if (uc != 0xFFFF) return 0; /* Check filler */
1957 }
1958 }
1959
1960 if (dir[LDIR_Ord] & LLEF && wc != 0) { /* Put terminator if it is the last LFN part and not terminated */
1961 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1962 lfnbuf[i] = 0;
1963 }
1964
1965 return 1; /* The part of LFN is valid */
1966 }
1967 #endif
1968
1969
1970 #if !FF_FS_READONLY
1971 /*-----------------------------------------*/
1972 /* FAT-LFN: Create an entry of LFN entries */
1973 /*-----------------------------------------*/
1974
1975 static void put_lfn (
1976 const WCHAR* lfn, /* Pointer to the LFN */
1977 BYTE* dir, /* Pointer to the LFN entry to be created */
1978 BYTE ord, /* LFN order (1-20) */
1979 BYTE sum /* Checksum of the corresponding SFN */
1980 )
1981 {
1982 UINT i, s;
1983 WCHAR wc;
1984
1985
1986 dir[LDIR_Chksum] = sum; /* Set checksum */
1987 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1988 dir[LDIR_Type] = 0;
1989 st_word(dir + LDIR_FstClusLO, 0);
1990
1991 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1992 s = wc = 0;
1993 do {
1994 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
1995 st_word(dir + LfnOfs[s], wc); /* Put it */
1996 if (wc == 0) wc = 0xFFFF; /* Padding characters for following items */
1997 } while (++s < 13);
1998 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
1999 dir[LDIR_Ord] = ord; /* Set the LFN order */
2000 }
2001
2002 #endif /* !FF_FS_READONLY */
2003 #endif /* FF_USE_LFN */
2004
2005
2006
2007 #if FF_USE_LFN && !FF_FS_READONLY
2008 /*-----------------------------------------------------------------------*/
2009 /* FAT-LFN: Create a Numbered SFN */
2010 /*-----------------------------------------------------------------------*/
2011
2012 static void gen_numname (
2013 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
2014 const BYTE* src, /* Pointer to SFN */
2015 const WCHAR* lfn, /* Pointer to LFN */
2016 UINT seq /* Sequence number */
2017 )
2018 {
2019 BYTE ns[8], c;
2020 UINT i, j;
2021 WCHAR wc;
2022 DWORD sreg;
2023
2024
2025 mem_cpy(dst, src, 11);
2026
2027 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
2028 sreg = seq;
2029 while (*lfn) { /* Create a CRC as hash value */
2030 wc = *lfn++;
2031 for (i = 0; i < 16; i++) {
2032 sreg = (sreg << 1) + (wc & 1);
2033 wc >>= 1;
2034 if (sreg & 0x10000) sreg ^= 0x11021;
2035 }
2036 }
2037 seq = (UINT)sreg;
2038 }
2039
2040 /* itoa (hexdecimal) */
2041 i = 7;
2042 do {
2043 c = (BYTE)((seq % 16) + '0');
2044 if (c > '9') c += 7;
2045 ns[i--] = c;
2046 seq /= 16;
2047 } while (seq);
2048 ns[i] = '~';
2049
2050 /* Append the number to the SFN body */
2051 for (j = 0; j < i && dst[j] != ' '; j++) {
2052 if (dbc_1st(dst[j])) {
2053 if (j == i - 1) break;
2054 j++;
2055 }
2056 }
2057 do {
2058 dst[j++] = (i < 8) ? ns[i++] : ' ';
2059 } while (j < 8);
2060 }
2061 #endif /* FF_USE_LFN && !FF_FS_READONLY */
2062
2063
2064
2065 #if FF_USE_LFN
2066 /*-----------------------------------------------------------------------*/
2067 /* FAT-LFN: Calculate checksum of an SFN entry */
2068 /*-----------------------------------------------------------------------*/
2069
2070 static BYTE sum_sfn (
2071 const BYTE* dir /* Pointer to the SFN entry */
2072 )
2073 {
2074 BYTE sum = 0;
2075 UINT n = 11;
2076
2077 do {
2078 sum = (sum >> 1) + (sum << 7) + *dir++;
2079 } while (--n);
2080 return sum;
2081 }
2082
2083 #endif /* FF_USE_LFN */
2084
2085
2086
2087 #if FF_FS_EXFAT
2088 /*-----------------------------------------------------------------------*/
2089 /* exFAT: Checksum */
2090 /*-----------------------------------------------------------------------*/
2091
2092 static WORD xdir_sum ( /* Get checksum of the directoly entry block */
2093 const BYTE* dir /* Directory entry block to be calculated */
2094 )
2095 {
2096 UINT i, szblk;
2097 WORD sum;
2098
2099
2100 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; /* Number of bytes of the entry block */
2101 for (i = sum = 0; i < szblk; i++) {
2102 if (i == XDIR_SetSum) { /* Skip 2-byte sum field */
2103 i++;
2104 } else {
2105 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
2106 }
2107 }
2108 return sum;
2109 }
2110
2111
2112
2113 static WORD xname_sum ( /* Get check sum (to be used as hash) of the file name */
2114 const WCHAR* name /* File name to be calculated */
2115 )
2116 {
2117 WCHAR chr;
2118 WORD sum = 0;
2119
2120
2121 while ((chr = *name++) != 0) {
2122 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be up-case converted */
2123 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
2124 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
2125 }
2126 return sum;
2127 }
2128
2129
2130 #if !FF_FS_READONLY && FF_USE_MKFS
2131 static DWORD xsum32 ( /* Returns 32-bit checksum */
2132 BYTE dat, /* Byte to be calculated (byte-by-byte processing) */
2133 DWORD sum /* Previous sum value */
2134 )
2135 {
2136 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
2137 return sum;
2138 }
2139 #endif
2140
2141
2142 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2143 /*------------------------------------------------------*/
2144 /* exFAT: Get object information from a directory block */
2145 /*------------------------------------------------------*/
2146
2147 static void get_xfileinfo (
2148 BYTE* dirb, /* Pointer to the direcotry entry block 85+C0+C1s */
2149 FILINFO* fno /* Buffer to store the extracted file information */
2150 )
2151 {
2152 WCHAR wc, hs;
2153 UINT di, si, nc;
2154
2155 /* Get file name from the entry block */
2156 si = SZDIRE * 2; /* 1st C1 entry */
2157 nc = 0; hs = 0; di = 0;
2158 while (nc < dirb[XDIR_NumName]) {
2159 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */
2160 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
2161 wc = ld_word(dirb + si); si += 2; nc++; /* Get a character */
2162 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2163 hs = wc; continue; /* Get low surrogate */
2164 }
2165 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2166 if (wc == 0) { di = 0; break; } /* Buffer overflow or wrong encoding? */
2167 di += wc;
2168 hs = 0;
2169 }
2170 if (hs != 0) di = 0; /* Broken surrogate pair? */
2171 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */
2172 fno->fname[di] = 0; /* Terminate the name */
2173 fno->altname[0] = 0; /* exFAT does not support SFN */
2174
2175 fno->fattrib = dirb[XDIR_Attr]; /* Attribute */
2176 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(dirb + XDIR_FileSize); /* Size */
2177 fno->ftime = ld_word(dirb + XDIR_ModTime + 0); /* Time */
2178 fno->fdate = ld_word(dirb + XDIR_ModTime + 2); /* Date */
2179 }
2180
2181 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2182
2183
2184 /*-----------------------------------*/
2185 /* exFAT: Get a directry entry block */
2186 /*-----------------------------------*/
2187
2188 static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
2189 DIR* dp /* Reading direcotry object pointing top of the entry block to load */
2190 )
2191 {
2192 FRESULT res;
2193 UINT i, sz_ent;
2194 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
2195
2196
2197 /* Load file-directory entry */
2198 res = move_window(dp->obj.fs, dp->sect);
2199 if (res != FR_OK) return res;
2200 if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR; /* Invalid order */
2201 mem_cpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);
2202 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE;
2203 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR;
2204
2205 /* Load stream-extension entry */
2206 res = dir_next(dp, 0);
2207 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2208 if (res != FR_OK) return res;
2209 res = move_window(dp->obj.fs, dp->sect);
2210 if (res != FR_OK) return res;
2211 if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR; /* Invalid order */
2212 mem_cpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);
2213 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR;
2214
2215 /* Load file-name entries */
2216 i = 2 * SZDIRE; /* Name offset to load */
2217 do {
2218 res = dir_next(dp, 0);
2219 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2220 if (res != FR_OK) return res;
2221 res = move_window(dp->obj.fs, dp->sect);
2222 if (res != FR_OK) return res;
2223 if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR; /* Invalid order */
2224 if (i < MAXDIRB(FF_MAX_LFN)) mem_cpy(dirb + i, dp->dir, SZDIRE);
2225 } while ((i += SZDIRE) < sz_ent);
2226
2227 /* Sanity check (do it for only accessible object) */
2228 if (i <= MAXDIRB(FF_MAX_LFN)) {
2229 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
2230 }
2231 return FR_OK;
2232 }
2233
2234
2235 /*------------------------------------------------------------------*/
2236 /* exFAT: Initialize object allocation info with loaded entry block */
2237 /*------------------------------------------------------------------*/
2238
2239 static void init_alloc_info (
2240 FATFS* fs, /* Filesystem object */
2241 FFOBJID* obj /* Object allocation information to be initialized */
2242 )
2243 {
2244 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */
2245 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2246 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */
2247 obj->n_frag = 0; /* No last fragment info */
2248 }
2249
2250
2251
2252 #if !FF_FS_READONLY || FF_FS_RPATH != 0
2253 /*------------------------------------------------*/
2254 /* exFAT: Load the object's directory entry block */
2255 /*------------------------------------------------*/
2256
2257 static FRESULT load_obj_xdir (
2258 DIR* dp, /* Blank directory object to be used to access containing direcotry */
2259 const FFOBJID* obj /* Object with its containing directory information */
2260 )
2261 {
2262 FRESULT res;
2263
2264 /* Open object containing directory */
2265 dp->obj.fs = obj->fs;
2266 dp->obj.sclust = obj->c_scl;
2267 dp->obj.stat = (BYTE)obj->c_size;
2268 dp->obj.objsize = obj->c_size & 0xFFFFFF00;
2269 dp->obj.n_frag = 0;
2270 dp->blk_ofs = obj->c_ofs;
2271
2272 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */
2273 if (res == FR_OK) {
2274 res = load_xdir(dp); /* Load the object's entry block */
2275 }
2276 return res;
2277 }
2278 #endif
2279
2280
2281 #if !FF_FS_READONLY
2282 /*----------------------------------------*/
2283 /* exFAT: Store the directory entry block */
2284 /*----------------------------------------*/
2285
2286 static FRESULT store_xdir (
2287 DIR* dp /* Pointer to the direcotry object */
2288 )
2289 {
2290 FRESULT res;
2291 UINT nent;
2292 BYTE* dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
2293
2294 /* Create set sum */
2295 st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
2296 nent = dirb[XDIR_NumSec] + 1;
2297
2298 /* Store the direcotry entry block to the directory */
2299 res = dir_sdi(dp, dp->blk_ofs);
2300 while (res == FR_OK) {
2301 res = move_window(dp->obj.fs, dp->sect);
2302 if (res != FR_OK) break;
2303 mem_cpy(dp->dir, dirb, SZDIRE);
2304 dp->obj.fs->wflag = 1;
2305 if (--nent == 0) break;
2306 dirb += SZDIRE;
2307 res = dir_next(dp, 0);
2308 }
2309 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
2310 }
2311
2312
2313
2314 /*-------------------------------------------*/
2315 /* exFAT: Create a new directory enrty block */
2316 /*-------------------------------------------*/
2317
2318 static void create_xdir (
2319 BYTE* dirb, /* Pointer to the direcotry entry block buffer */
2320 const WCHAR* lfn /* Pointer to the object name */
2321 )
2322 {
2323 UINT i;
2324 BYTE nc1, nlen;
2325 WCHAR wc;
2326
2327
2328 /* Create file-directory and stream-extension entry */
2329 mem_set(dirb, 0, 2 * SZDIRE);
2330 dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR;
2331 dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM;
2332
2333 /* Create file-name entries */
2334 i = SZDIRE * 2; /* Top of file_name entries */
2335 nlen = nc1 = 0; wc = 1;
2336 do {
2337 dirb[i++] = ET_FILENAME; dirb[i++] = 0;
2338 do { /* Fill name field */
2339 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */
2340 st_word(dirb + i, wc); /* Store it */
2341 i += 2;
2342 } while (i % SZDIRE != 0);
2343 nc1++;
2344 } while (lfn[nlen]); /* Fill next entry if any char follows */
2345
2346 dirb[XDIR_NumName] = nlen; /* Set name length */
2347 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */
2348 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
2349 }
2350
2351 #endif /* !FF_FS_READONLY */
2352 #endif /* FF_FS_EXFAT */
2353
2354
2355
2356 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
2357 /*-----------------------------------------------------------------------*/
2358 /* Read an object from the directory */
2359 /*-----------------------------------------------------------------------*/
2360
2361 #define DIR_READ_FILE(dp) dir_read(dp, 0)
2362 #define DIR_READ_LABEL(dp) dir_read(dp, 1)
2363
2364 static FRESULT dir_read (
2365 DIR* dp, /* Pointer to the directory object */
2366 int vol /* Filtered by 0:file/directory or 1:volume label */
2367 )
2368 {
2369 FRESULT res = FR_NO_FILE;
2370 FATFS *fs = dp->obj.fs;
2371 BYTE attr, b;
2372 #if FF_USE_LFN
2373 BYTE ord = 0xFF, sum = 0xFF;
2374 #endif
2375
2376 while (dp->sect) {
2377 res = move_window(fs, dp->sect);
2378 if (res != FR_OK) break;
2379 b = dp->dir[DIR_Name]; /* Test for the entry type */
2380 if (b == 0) {
2381 res = FR_NO_FILE; break; /* Reached to end of the directory */
2382 }
2383 #if FF_FS_EXFAT
2384 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2385 if (FF_USE_LABEL && vol) {
2386 if (b == ET_VLABEL) break; /* Volume label entry? */
2387 } else {
2388 if (b == ET_FILEDIR) { /* Start of the file entry block? */
2389 dp->blk_ofs = dp->dptr; /* Get location of the block */
2390 res = load_xdir(dp); /* Load the entry block */
2391 if (res == FR_OK) {
2392 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
2393 }
2394 break;
2395 }
2396 }
2397 } else
2398 #endif
2399 { /* On the FAT/FAT32 volume */
2400 dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
2401 #if FF_USE_LFN /* LFN configuration */
2402 if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
2403 ord = 0xFF;
2404 } else {
2405 if (attr == AM_LFN) { /* An LFN entry is found */
2406 if (b & LLEF) { /* Is it start of an LFN sequence? */
2407 sum = dp->dir[LDIR_Chksum];
2408 b &= (BYTE)~LLEF; ord = b;
2409 dp->blk_ofs = dp->dptr;
2410 }
2411 /* Check LFN validity and capture it */
2412 ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2413 } else { /* An SFN entry is found */
2414 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
2415 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
2416 }
2417 break;
2418 }
2419 }
2420 #else /* Non LFN configuration */
2421 if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
2422 break;
2423 }
2424 #endif
2425 }
2426 res = dir_next(dp, 0); /* Next entry */
2427 if (res != FR_OK) break;
2428 }
2429
2430 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
2431 return res;
2432 }
2433
2434 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
2435
2436
2437
2438 /*-----------------------------------------------------------------------*/
2439 /* Directory handling - Find an object in the directory */
2440 /*-----------------------------------------------------------------------*/
2441
2442 static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
2443 DIR* dp /* Pointer to the directory object with the file name */
2444 )
2445 {
2446 FRESULT res;
2447 FATFS *fs = dp->obj.fs;
2448 BYTE c;
2449 #if FF_USE_LFN
2450 BYTE a, ord, sum;
2451 #endif
2452
2453 res = dir_sdi(dp, 0); /* Rewind directory object */
2454 if (res != FR_OK) return res;
2455 #if FF_FS_EXFAT
2456 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2457 BYTE nc;
2458 UINT di, ni;
2459 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
2460
2461 while ((res = DIR_READ_FILE(dp)) == FR_OK) { /* Read an item */
2462 #if FF_MAX_LFN < 255
2463 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */
2464 #endif
2465 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */
2466 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
2467 if ((di % SZDIRE) == 0) di += 2;
2468 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
2469 }
2470 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
2471 }
2472 return res;
2473 }
2474 #endif
2475 /* On the FAT/FAT32 volume */
2476 #if FF_USE_LFN
2477 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2478 #endif
2479 do {
2480 res = move_window(fs, dp->sect);
2481 if (res != FR_OK) break;
2482 c = dp->dir[DIR_Name];
2483 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
2484 #if FF_USE_LFN /* LFN configuration */
2485 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
2486 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
2487 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2488 } else {
2489 if (a == AM_LFN) { /* An LFN entry is found */
2490 if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
2491 if (c & LLEF) { /* Is it start of LFN sequence? */
2492 sum = dp->dir[LDIR_Chksum];
2493 c &= (BYTE)~LLEF; ord = c; /* LFN start order */
2494 dp->blk_ofs = dp->dptr; /* Start offset of LFN */
2495 }
2496 /* Check validity of the LFN entry and compare it with given name */
2497 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2498 }
2499 } else { /* An SFN entry is found */
2500 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
2501 if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
2502 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2503 }
2504 }
2505 #else /* Non LFN configuration */
2506 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
2507 if (!(dp->dir[DIR_Attr] & AM_VOL) && !mem_cmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
2508 #endif
2509 res = dir_next(dp, 0); /* Next entry */
2510 } while (res == FR_OK);
2511
2512 return res;
2513 }
2514
2515
2516
2517
2518 #if !FF_FS_READONLY
2519 /*-----------------------------------------------------------------------*/
2520 /* Register an object to the directory */
2521 /*-----------------------------------------------------------------------*/
2522
2523 static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
2524 DIR* dp /* Target directory with object name to be created */
2525 )
2526 {
2527 FRESULT res;
2528 FATFS *fs = dp->obj.fs;
2529 #if FF_USE_LFN /* LFN configuration */
2530 UINT n, nlen, nent;
2531 BYTE sn[12], sum;
2532
2533
2534 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
2535 for (nlen = 0; fs->lfnbuf[nlen]; nlen++) ; /* Get lfn length */
2536
2537 #if FF_FS_EXFAT
2538 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2539 nent = (nlen + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
2540 res = dir_alloc(dp, nent); /* Allocate directory entries */
2541 if (res != FR_OK) return res;
2542 dp->blk_ofs = dp->dptr - SZDIRE * (nent - 1); /* Set the allocated entry block offset */
2543
2544 if (dp->obj.stat & 4) { /* Has the directory been stretched by new allocation? */
2545 dp->obj.stat &= ~4;
2546 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */
2547 if (res != FR_OK) return res;
2548 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */
2549 if (res != FR_OK) return res;
2550 if (dp->obj.sclust != 0) { /* Is it a sub-directory? */
2551 DIR dj;
2552
2553 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */
2554 if (res != FR_OK) return res;
2555 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */
2556 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize);
2557 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
2558 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; /* Update the allocation status */
2559 res = store_xdir(&dj); /* Store the object status */
2560 if (res != FR_OK) return res;
2561 }
2562 }
2563
2564 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
2565 return FR_OK;
2566 }
2567 #endif
2568 /* On the FAT/FAT32 volume */
2569 mem_cpy(sn, dp->fn, 12);
2570 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
2571 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
2572 for (n = 1; n < 100; n++) {
2573 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
2574 res = dir_find(dp); /* Check if the name collides with existing SFN */
2575 if (res != FR_OK) break;
2576 }
2577 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
2578 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
2579 dp->fn[NSFLAG] = sn[NSFLAG];
2580 }
2581
2582 /* Create an SFN with/without LFNs. */
2583 nent = (sn[NSFLAG] & NS_LFN) ? (nlen + 12) / 13 + 1 : 1; /* Number of entries to allocate */
2584 res = dir_alloc(dp, nent); /* Allocate entries */
2585 if (res == FR_OK && --nent) { /* Set LFN entry if needed */
2586 res = dir_sdi(dp, dp->dptr - nent * SZDIRE);
2587 if (res == FR_OK) {
2588 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
2589 do { /* Store LFN entries in bottom first */
2590 res = move_window(fs, dp->sect);
2591 if (res != FR_OK) break;
2592 put_lfn(fs->lfnbuf, dp->dir, (BYTE)nent, sum);
2593 fs->wflag = 1;
2594 res = dir_next(dp, 0); /* Next entry */
2595 } while (res == FR_OK && --nent);
2596 }
2597 }
2598
2599 #else /* Non LFN configuration */
2600 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
2601
2602 #endif
2603
2604 /* Set SFN entry */
2605 if (res == FR_OK) {
2606 res = move_window(fs, dp->sect);
2607 if (res == FR_OK) {
2608 mem_set(dp->dir, 0, SZDIRE); /* Clean the entry */
2609 mem_cpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
2610 #if FF_USE_LFN
2611 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
2612 #endif
2613 fs->wflag = 1;
2614 }
2615 }
2616
2617 return res;
2618 }
2619
2620 #endif /* !FF_FS_READONLY */
2621
2622
2623
2624 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0
2625 /*-----------------------------------------------------------------------*/
2626 /* Remove an object from the directory */
2627 /*-----------------------------------------------------------------------*/
2628
2629 static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
2630 DIR* dp /* Directory object pointing the entry to be removed */
2631 )
2632 {
2633 FRESULT res;
2634 FATFS *fs = dp->obj.fs;
2635 #if FF_USE_LFN /* LFN configuration */
2636 DWORD last = dp->dptr;
2637
2638 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
2639 if (res == FR_OK) {
2640 do {
2641 res = move_window(fs, dp->sect);
2642 if (res != FR_OK) break;
2643 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2644 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */
2645 } else { /* On the FAT/FAT32 volume */
2646 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */
2647 }
2648 fs->wflag = 1;
2649 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
2650 res = dir_next(dp, 0); /* Next entry */
2651 } while (res == FR_OK);
2652 if (res == FR_NO_FILE) res = FR_INT_ERR;
2653 }
2654 #else /* Non LFN configuration */
2655
2656 res = move_window(fs, dp->sect);
2657 if (res == FR_OK) {
2658 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/
2659 fs->wflag = 1;
2660 }
2661 #endif
2662
2663 return res;
2664 }
2665
2666 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */
2667
2668
2669
2670 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2671 /*-----------------------------------------------------------------------*/
2672 /* Get file information from directory entry */
2673 /*-----------------------------------------------------------------------*/
2674
2675 static void get_fileinfo (
2676 DIR* dp, /* Pointer to the directory object */
2677 FILINFO* fno /* Pointer to the file information to be filled */
2678 )
2679 {
2680 UINT si, di;
2681 #if FF_USE_LFN
2682 BYTE lcf;
2683 WCHAR wc, hs;
2684 FATFS *fs = dp->obj.fs;
2685 #else
2686 TCHAR c;
2687 #endif
2688
2689
2690 fno->fname[0] = 0; /* Invaidate file info */
2691 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */
2692
2693 #if FF_USE_LFN /* LFN configuration */
2694 #if FF_FS_EXFAT
2695 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2696 get_xfileinfo(fs->dirbuf, fno);
2697 return;
2698 } else
2699 #endif
2700 { /* On the FAT/FAT32 volume */
2701 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
2702 si = di = hs = 0;
2703 while (fs->lfnbuf[si] != 0) {
2704 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */
2705 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2706 hs = wc; continue; /* Get low surrogate */
2707 }
2708 wc = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in UTF-16 or UTF-8 encoding */
2709 if (wc == 0) { di = 0; break; } /* Invalid char or buffer overflow? */
2710 di += wc;
2711 hs = 0;
2712 }
2713 if (hs != 0) di = 0; /* Broken surrogate pair? */
2714 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */
2715 }
2716 }
2717
2718 si = di = 0;
2719 while (si < 11) { /* Get SFN from SFN entry */
2720 wc = dp->dir[si++]; /* Get a char */
2721 if (wc == ' ') continue; /* Skip padding spaces */
2722 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */
2723 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */
2724 #if FF_LFN_UNICODE >= 1 /* Unicode output */
2725 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */
2726 wc = wc << 8 | dp->dir[si++];
2727 }
2728 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */
2729 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */
2730 wc = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in Unicode */
2731 if (wc == 0) { di = 0; break; } /* Buffer overflow? */
2732 di += wc;
2733 #else /* ANSI/OEM output */
2734 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */
2735 #endif
2736 }
2737 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */
2738
2739 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */
2740 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */
2741 fno->fname[di++] = '?';
2742 } else {
2743 for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */
2744 wc = (WCHAR)fno->altname[si];
2745 if (wc == '.') lcf = NS_EXT;
2746 if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20;
2747 fno->fname[di] = (TCHAR)wc;
2748 }
2749 }
2750 fno->fname[di] = 0; /* Terminate the LFN */
2751 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */
2752 }
2753
2754 #else /* Non-LFN configuration */
2755 si = di = 0;
2756 while (si < 11) { /* Copy name body and extension */
2757 c = (TCHAR)dp->dir[si++];
2758 if (c == ' ') continue; /* Skip padding spaces */
2759 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */
2760 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */
2761 fno->fname[di++] = c;
2762 }
2763 fno->fname[di] = 0;
2764 #endif
2765
2766 fno->fattrib = dp->dir[DIR_Attr]; /* Attribute */
2767 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
2768 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */
2769 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */
2770 }
2771
2772 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2773
2774
2775
2776 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1
2777 /*-----------------------------------------------------------------------*/
2778 /* Pattern matching */
2779 /*-----------------------------------------------------------------------*/
2780
2781 static DWORD get_achar ( /* Get a character and advances ptr */
2782 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */
2783 )
2784 {
2785 DWORD chr;
2786
2787
2788 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */
2789 chr = tchar2uni(ptr);
2790 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */
2791 chr = ff_wtoupper(chr);
2792
2793 #else /* ANSI/OEM input */
2794 chr = (BYTE)*(*ptr)++; /* Get a byte */
2795 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
2796 #if FF_CODE_PAGE == 0
2797 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2798 #elif FF_CODE_PAGE < 900
2799 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2800 #endif
2801 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900
2802 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */
2803 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0;
2804 }
2805 #endif
2806
2807 #endif
2808 return chr;
2809 }
2810
2811
2812 static int pattern_matching ( /* 0:not matched, 1:matched */
2813 const TCHAR* pat, /* Matching pattern */
2814 const TCHAR* nam, /* String to be tested */
2815 int skip, /* Number of pre-skip chars (number of ?s) */
2816 int inf /* Infinite search (* specified) */
2817 )
2818 {
2819 const TCHAR *pp, *np;
2820 DWORD pc, nc;
2821 int nm, nx;
2822
2823
2824 while (skip--) { /* Pre-skip name chars */
2825 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
2826 }
2827 if (*pat == 0 && inf) return 1; /* (short circuit) */
2828
2829 do {
2830 pp = pat; np = nam; /* Top of pattern and name to match */
2831 for (;;) {
2832 if (*pp == '?' || *pp == '*') { /* Wildcard? */
2833 nm = nx = 0;
2834 do { /* Analyze the wildcard block */
2835 if (*pp++ == '?') nm++; else nx = 1;
2836 } while (*pp == '?' || *pp == '*');
2837 if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
2838 nc = *np; break; /* Branch mismatched */
2839 }
2840 pc = get_achar(&pp); /* Get a pattern char */
2841 nc = get_achar(&np); /* Get a name char */
2842 if (pc != nc) break; /* Branch mismatched? */
2843 if (pc == 0) return 1; /* Branch matched? (matched at end of both strings) */
2844 }
2845 get_achar(&nam); /* nam++ */
2846 } while (inf && nc); /* Retry until end of name if infinite search is specified */
2847
2848 return 0;
2849 }
2850
2851 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
2852
2853
2854
2855 /*-----------------------------------------------------------------------*/
2856 /* Pick a top segment and create the object name in directory form */
2857 /*-----------------------------------------------------------------------*/
2858
2859 static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
2860 DIR* dp, /* Pointer to the directory object */
2861 const TCHAR** path /* Pointer to pointer to the segment in the path string */
2862 )
2863 {
2864 #if FF_USE_LFN /* LFN configuration */
2865 BYTE b, cf;
2866 WCHAR wc, *lfn;
2867 DWORD uc;
2868 UINT i, ni, si, di;
2869 const TCHAR *p;
2870
2871
2872 /* Create LFN into LFN working buffer */
2873 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0;
2874 for (;;) {
2875 uc = tchar2uni(&p); /* Get a character */
2876 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */
2877 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */
2878 wc = (WCHAR)uc;
2879 if (wc < ' ' || wc == '/' || wc == '\\') break; /* Break if end of the path or a separator is found */
2880 if (wc < 0x80 && chk_chr("\"*:<>\?|\x7F", wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
2881 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
2882 lfn[di++] = wc; /* Store the Unicode character */
2883 }
2884 if (wc < ' ') { /* End of path? */
2885 cf = NS_LAST; /* Set last segment flag */
2886 } else {
2887 cf = 0; /* Next segment follows */
2888 while (*p == '/' || *p == '\\') p++; /* Skip duplicated separators if exist */
2889 }
2890 *path = p; /* Return pointer to the next segment */
2891
2892 #if FF_FS_RPATH != 0
2893 if ((di == 1 && lfn[di - 1] == '.') ||
2894 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
2895 lfn[di] = 0;
2896 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */
2897 dp->fn[i] = (i < di) ? '.' : ' ';
2898 }
2899 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2900 return FR_OK;
2901 }
2902 #endif
2903 while (di) { /* Snip off trailing spaces and dots if exist */
2904 wc = lfn[di - 1];
2905 if (wc != ' ' && wc != '.') break;
2906 di--;
2907 }
2908 lfn[di] = 0; /* LFN is created into the working buffer */
2909 if (di == 0) return FR_INVALID_NAME; /* Reject null name */
2910
2911 /* Create SFN in directory form */
2912 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */
2913 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */
2914 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */
2915
2916 mem_set(dp->fn, ' ', 11);
2917 i = b = 0; ni = 8;
2918 for (;;) {
2919 wc = lfn[si++]; /* Get an LFN character */
2920 if (wc == 0) break; /* Break on end of the LFN */
2921 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */
2922 cf |= NS_LOSS | NS_LFN;
2923 continue;
2924 }
2925
2926 if (i >= ni || si == di) { /* End of field? */
2927 if (ni == 11) { /* Name extension overflow? */
2928 cf |= NS_LOSS | NS_LFN;
2929 break;
2930 }
2931 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */
2932 if (si > di) break; /* No name extension? */
2933 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */
2934 continue;
2935 }
2936
2937 if (wc >= 0x80) { /* Is this a non-ASCII character? */
2938 cf |= NS_LFN; /* LFN entry needs to be created */
2939 #if FF_CODE_PAGE == 0
2940 if (ExCvt) { /* At SBCS */
2941 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2942 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2943 } else { /* At DBCS */
2944 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */
2945 }
2946 #elif FF_CODE_PAGE < 900 /* SBCS cfg */
2947 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2948 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2949 #else /* DBCS cfg */
2950 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Upper convert ==> ANSI/OEM code */
2951 #endif
2952 }
2953
2954 if (wc >= 0x100) { /* Is this a DBC? */
2955 if (i >= ni - 1) { /* Field overflow? */
2956 cf |= NS_LOSS | NS_LFN;
2957 i = ni; continue; /* Next field */
2958 }
2959 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */
2960 } else { /* SBC */
2961 if (wc == 0 || chk_chr("+,;=[]", wc)) { /* Replace illegal characters for SFN if needed */
2962 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2963 } else {
2964 if (IsUpper(wc)) { /* ASCII upper case? */
2965 b |= 2;
2966 }
2967 if (IsLower(wc)) { /* ASCII lower case? */
2968 b |= 1; wc -= 0x20;
2969 }
2970 }
2971 }
2972 dp->fn[i++] = (BYTE)wc;
2973 }
2974
2975 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2976
2977 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */
2978 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */
2979 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2980 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */
2981 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */
2982 }
2983
2984 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */
2985
2986 return FR_OK;
2987
2988
2989 #else /* FF_USE_LFN : Non-LFN configuration */
2990 BYTE c, d, *sfn;
2991 UINT ni, si, i;
2992 const char *p;
2993
2994 /* Create file name in directory form */
2995 p = *path; sfn = dp->fn;
2996 mem_set(sfn, ' ', 11);
2997 si = i = 0; ni = 8;
2998 #if FF_FS_RPATH != 0
2999 if (p[si] == '.') { /* Is this a dot entry? */
3000 for (;;) {
3001 c = (BYTE)p[si++];
3002 if (c != '.' || si >= 3) break;
3003 sfn[i++] = c;
3004 }
3005 if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
3006 *path = p + si; /* Return pointer to the next segment */
3007 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
3008 return FR_OK;
3009 }
3010 #endif
3011 for (;;) {
3012 c = (BYTE)p[si++]; /* Get a byte */
3013 if (c <= ' ') break; /* Break if end of the path name */
3014 if (c == '/' || c == '\\') { /* Break if a separator is found */
3015 while (p[si] == '/' || p[si] == '\\') si++; /* Skip duplicated separator if exist */
3016 break;
3017 }
3018 if (c == '.' || i >= ni) { /* End of body or field overflow? */
3019 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */
3020 i = 8; ni = 11; /* Enter file extension field */
3021 continue;
3022 }
3023 #if FF_CODE_PAGE == 0
3024 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */
3025 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
3026 }
3027 #elif FF_CODE_PAGE < 900
3028 if (c >= 0x80) { /* Is SBC extended character? */
3029 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
3030 }
3031 #endif
3032 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */
3033 d = (BYTE)p[si++]; /* Get 2nd byte */
3034 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
3035 sfn[i++] = c;
3036 sfn[i++] = d;
3037 } else { /* SBC */
3038 if (chk_chr("\"*+,:;<=>\?[]|\x7F", c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
3039 if (IsLower(c)) c -= 0x20; /* To upper */
3040 sfn[i++] = c;
3041 }
3042 }
3043 *path = p + si; /* Return pointer to the next segment */
3044 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
3045
3046 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
3047 sfn[NSFLAG] = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
3048
3049 return FR_OK;
3050 #endif /* FF_USE_LFN */
3051 }
3052
3053
3054
3055
3056 /*-----------------------------------------------------------------------*/
3057 /* Follow a file path */
3058 /*-----------------------------------------------------------------------*/
3059
3060 static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
3061 DIR* dp, /* Directory object to return last directory and found object */
3062 const TCHAR* path /* Full-path string to find a file or directory */
3063 )
3064 {
3065 FRESULT res;
3066 BYTE ns;
3067 FATFS *fs = dp->obj.fs;
3068
3069
3070 #if FF_FS_RPATH != 0
3071 if (*path != '/' && *path != '\\') { /* Without heading separator */
3072 dp->obj.sclust = fs->cdir; /* Start from current directory */
3073 } else
3074 #endif
3075 { /* With heading separator */
3076 while (*path == '/' || *path == '\\') path++; /* Strip heading separator */
3077 dp->obj.sclust = 0; /* Start from root directory */
3078 }
3079 #if FF_FS_EXFAT
3080 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */
3081 #if FF_FS_RPATH != 0
3082 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */
3083 DIR dj;
3084
3085 dp->obj.c_scl = fs->cdc_scl;
3086 dp->obj.c_size = fs->cdc_size;
3087 dp->obj.c_ofs = fs->cdc_ofs;
3088 res = load_obj_xdir(&dj, &dp->obj);
3089 if (res != FR_OK) return res;
3090 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
3091 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3092 }
3093 #endif
3094 #endif
3095
3096 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
3097 dp->fn[NSFLAG] = NS_NONAME;
3098 res = dir_sdi(dp, 0);
3099
3100 } else { /* Follow path */
3101 for (;;) {
3102 res = create_name(dp, &path); /* Get a segment name of the path */
3103 if (res != FR_OK) break;
3104 res = dir_find(dp); /* Find an object with the segment name */
3105 ns = dp->fn[NSFLAG];
3106 if (res != FR_OK) { /* Failed to find the object */
3107 if (res == FR_NO_FILE) { /* Object is not found */
3108 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
3109 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
3110 dp->fn[NSFLAG] = NS_NONAME;
3111 res = FR_OK;
3112 } else { /* Could not find the object */
3113 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
3114 }
3115 }
3116 break;
3117 }
3118 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
3119 /* Get into the sub-directory */
3120 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
3121 res = FR_NO_PATH; break;
3122 }
3123 #if FF_FS_EXFAT
3124 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */
3125 dp->obj.c_scl = dp->obj.sclust;
3126 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
3127 dp->obj.c_ofs = dp->blk_ofs;
3128 init_alloc_info(fs, &dp->obj); /* Open next directory */
3129 } else
3130 #endif
3131 {
3132 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
3133 }
3134 }
3135 }
3136
3137 return res;
3138 }
3139
3140
3141
3142
3143 /*-----------------------------------------------------------------------*/
3144 /* Get logical drive number from path name */
3145 /*-----------------------------------------------------------------------*/
3146
3147 static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive number or null pointer) */
3148 const TCHAR** path /* Pointer to pointer to the path name */
3149 )
3150 {
3151 const TCHAR *tp, *tt;
3152 TCHAR tc;
3153 int i, vol = -1;
3154 #if FF_STR_VOLUME_ID /* Find string volume ID */
3155 const char *sp;
3156 char c;
3157 #endif
3158
3159 tt = tp = *path;
3160 if (!tp) return vol; /* Invalid path name? */
3161 do tc = *tt++; while ((UINT)tc >= (FF_USE_LFN ? ' ' : '!') && tc != ':'); /* Find a colon in the path */
3162
3163 if (tc == ':') { /* DOS/Windows style volume ID? */
3164 i = FF_VOLUMES;
3165 if (IsDigit(*tp) && tp + 2 == tt) { /* Is there a numeric volume ID + colon? */
3166 i = (int)*tp - '0'; /* Get the LD number */
3167 }
3168 #if FF_STR_VOLUME_ID == 1 /* Arbitrary string is enabled */
3169 else {
3170 i = 0;
3171 do {
3172 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */
3173 do { /* Compare the volume ID with path name */
3174 c = *sp++; tc = *tp++;
3175 if (IsLower(c)) c -= 0x20;
3176 if (IsLower(tc)) tc -= 0x20;
3177 } while (c && (TCHAR)c == tc);
3178 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
3179 }
3180 #endif
3181 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3182 vol = i; /* Drive number */
3183 *path = tt; /* Snip the drive prefix off */
3184 }
3185 return vol;
3186 }
3187 #if FF_STR_VOLUME_ID == 2 /* Unix style volume ID is enabled */
3188 if (*tp == '/') {
3189 i = 0;
3190 do {
3191 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */
3192 do { /* Compare the volume ID with path name */
3193 c = *sp++; tc = *(++tp);
3194 if (IsLower(c)) c -= 0x20;
3195 if (IsLower(tc)) tc -= 0x20;
3196 } while (c && (TCHAR)c == tc);
3197 } while ((c || (tc != '/' && (UINT)tc >= (FF_USE_LFN ? ' ' : '!'))) && ++i < FF_VOLUMES); /* Repeat for each ID until pattern match */
3198 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3199 vol = i; /* Drive number */
3200 *path = tp; /* Snip the drive prefix off */
3201 return vol;
3202 }
3203 }
3204 #endif
3205 /* No drive prefix is found */
3206 #if FF_FS_RPATH != 0
3207 vol = CurrVol; /* Default drive is current drive */
3208 #else
3209 vol = 0; /* Default drive is 0 */
3210 #endif
3211 return vol; /* Return the default drive */
3212 }
3213
3214
3215
3216
3217 /*-----------------------------------------------------------------------*/
3218 /* GPT support functions */
3219 /*-----------------------------------------------------------------------*/
3220
3221 #if FF_LBA64
3222
3223 /* Calculate CRC32 in byte-by-byte */
3224
3225 static DWORD crc32 ( /* Returns next CRC value */
3226 DWORD crc, /* Current CRC value */
3227 BYTE d /* A byte to be processed */
3228 )
3229 {
3230 BYTE b;
3231
3232
3233 for (b = 1; b; b <<= 1) {
3234 crc ^= (d & b) ? 1 : 0;
3235 crc = (crc & 1) ? crc >> 1 ^ 0xEDB88320 : crc >> 1;
3236 }
3237 return crc;
3238 }
3239
3240
3241 /* Check validity of GPT header */
3242
3243 static int test_gpt_header ( /* 0:Invalid, 1:Valid */
3244 const BYTE* gpth /* Pointer to the GPT header */
3245 )
3246 {
3247 UINT i;
3248 DWORD bcc;
3249
3250
3251 if (mem_cmp(gpth + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16)) return 0; /* Check sign, version (1.0) and length (92) */
3252 for (i = 0, bcc = 0xFFFFFFFF; i < 92; i++) { /* Check header BCC */
3253 bcc = crc32(bcc, i - GPTH_Bcc < 4 ? 0 : gpth[i]);
3254 }
3255 if (~bcc != ld_dword(gpth + GPTH_Bcc)) return 0;
3256 if (ld_dword(gpth + GPTH_PteSize) != SZ_GPTE) return 0; /* Table entry size (must be SZ_GPTE bytes) */
3257 if (ld_dword(gpth + GPTH_PtNum) > 128) return 0; /* Table size (must be 128 entries or less) */
3258
3259 return 1;
3260 }
3261
3262 #if !FF_FS_READONLY && FF_USE_MKFS
3263
3264 /* Generate random value */
3265 static DWORD make_rand (
3266 DWORD seed, /* Seed value */
3267 BYTE* buff, /* Output buffer */
3268 UINT n /* Data length */
3269 )
3270 {
3271 UINT r;
3272
3273
3274 if (seed == 0) seed = 1;
3275 do {
3276 for (r = 0; r < 8; r++) seed = seed & 1 ? seed >> 1 ^ 0xA3000000 : seed >> 1; /* Shift 8 bits the 32-bit LFSR */
3277 *buff++ = (BYTE)seed;
3278 } while (--n);
3279 return seed;
3280 }
3281
3282 #endif
3283 #endif
3284
3285
3286
3287 /*-----------------------------------------------------------------------*/
3288 /* Load a sector and check if it is an FAT VBR */
3289 /*-----------------------------------------------------------------------*/
3290
3291 /* Check what the sector is */
3292
3293 static UINT check_fs ( /* 0:FAT VBR, 1:exFAT VBR, 2:Valid BS but not FAT, 3:Invalid BS, 4:Disk error */
3294 FATFS* fs, /* Filesystem object */
3295 LBA_t sect /* Sector to load and check if it is an FAT-VBR or not */
3296 )
3297 {
3298 fs->wflag = 0; fs->winsect = (LBA_t)0 - 1; /* Invaidate window */
3299 if (move_window(fs, sect) != FR_OK) return 4; /* Load the boot sector */
3300
3301 if (ld_word(fs->win + BS_55AA) != 0xAA55) return 3; /* Check boot signature (always here regardless of the sector size) */
3302
3303 if (FF_FS_EXFAT && !mem_cmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* Check if exFAT VBR */
3304
3305 if (fs->win[BS_JmpBoot] == 0xE9 || fs->win[BS_JmpBoot] == 0xEB || fs->win[BS_JmpBoot] == 0xE8) { /* Valid JumpBoot code? */
3306 if (!mem_cmp(fs->win + BS_FilSysType, "FAT", 3)) return 0; /* Is it an FAT VBR? */
3307 if (!mem_cmp(fs->win + BS_FilSysType32, "FAT32", 5)) return 0; /* Is it an FAT32 VBR? */
3308 }
3309 return 2; /* Valid BS but not FAT */
3310 }
3311
3312
3313 /* Find an FAT volume */
3314 /* (It supports only generic partitioning rules, MBR, GPT and SFD) */
3315
3316 static UINT find_volume ( /* Returns BS status found in the hosting drive */
3317 FATFS* fs, /* Filesystem object */
3318 UINT part /* Partition to fined = 0:auto, 1..:forced */
3319 )
3320 {
3321 UINT fmt, i;
3322 DWORD mbr_pt[4];
3323
3324
3325 fmt = check_fs(fs, 0); /* Load sector 0 and check if it is an FAT VBR as SFD */
3326 if (fmt != 2 && (fmt >= 3 || part == 0)) return fmt; /* Returns if it is a FAT VBR as auto scan, not a BS or disk error */
3327
3328 /* Sector 0 is not an FAT VBR or forced partition number wants a partition */
3329
3330 #if FF_LBA64
3331 if (fs->win[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
3332 DWORD n_ent, v_ent, ofs;
3333 QWORD pt_lba;
3334
3335 if (move_window(fs, 1) != FR_OK) return 4; /* Load GPT header sector (next to MBR) */
3336 if (!test_gpt_header(fs->win)) return 3; /* Check if GPT header is valid */
3337 n_ent = ld_dword(fs->win + GPTH_PtNum); /* Number of entries */
3338 pt_lba = ld_qword(fs->win + GPTH_PtOfs); /* Table location */
3339 for (v_ent = i = 0; i < n_ent; i++) { /* Find FAT partition */
3340 if (move_window(fs, pt_lba + i * SZ_GPTE / SS(fs)) != FR_OK) return 4; /* PT sector */
3341 ofs = i * SZ_GPTE % SS(fs); /* Offset in the sector */
3342 if (!mem_cmp(fs->win + ofs + GPTE_PtGuid, GUID_MS_Basic, 16)) { /* MS basic data partition? */
3343 v_ent++;
3344 fmt = check_fs(fs, ld_qword(fs->win + ofs + GPTE_FstLba)); /* Load VBR and check status */
3345 if (part == 0 && fmt <= 1) return fmt; /* Auto search (valid FAT volume found first) */
3346 if (part != 0 && v_ent == part) return fmt; /* Forced partition order (regardless of it is valid or not) */
3347 }
3348 }
3349 return 3; /* Not found */
3350 }
3351 #endif
3352 if (FF_MULTI_PARTITION && part > 4) return 3; /* MBR has 4 partitions max */
3353 for (i = 0; i < 4; i++) { /* Load partition offset in the MBR */
3354 mbr_pt[i] = ld_dword(fs->win + MBR_Table + i * SZ_PTE + PTE_StLba);
3355 }
3356 i = part ? part - 1 : 0; /* Table index to find first */
3357 do { /* Find an FAT volume */
3358 fmt = mbr_pt[i] ? check_fs(fs, mbr_pt[i]) : 3; /* Check if the partition is FAT */
3359 } while (part == 0 && fmt >= 2 && ++i < 4);
3360 return fmt;
3361 }
3362
3363
3364
3365
3366 /*-----------------------------------------------------------------------*/
3367 /* Determine logical drive number and mount the volume if needed */
3368 /*-----------------------------------------------------------------------*/
3369
3370 static FRESULT mount_volume ( /* FR_OK(0): successful, !=0: an error occurred */
3371 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
3372 FATFS** rfs, /* Pointer to pointer to the found filesystem object */
3373 BYTE mode /* !=0: Check write protection for write access */
3374 )
3375 {
3376 int vol;
3377 DSTATUS stat;
3378 LBA_t bsect;
3379 DWORD tsect, sysect, fasize, nclst, szbfat;
3380 WORD nrsv;
3381 FATFS *fs;
3382 UINT fmt;
3383
3384
3385 /* Get logical drive number */
3386 *rfs = 0;
3387 vol = get_ldnumber(path);
3388 if (vol < 0) return FR_INVALID_DRIVE;
3389
3390 /* Check if the filesystem object is valid or not */
3391 fs = FatFs[vol]; /* Get pointer to the filesystem object */
3392 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */
3393 #if FF_FS_REENTRANT
3394 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */
3395 #endif
3396 *rfs = fs; /* Return pointer to the filesystem object */
3397
3398 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
3399 if (fs->fs_type != 0) { /* If the volume has been mounted */
3400 stat = disk_status(fs->pdrv);
3401 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
3402 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
3403 return FR_WRITE_PROTECTED;
3404 }
3405 return FR_OK; /* The filesystem object is already valid */
3406 }
3407 }
3408
3409 /* The filesystem object is not valid. */
3410 /* Following code attempts to mount the volume. (find a FAT volume, analyze the BPB and initialize the filesystem object) */
3411
3412 fs->fs_type = 0; /* Clear the filesystem object */
3413 fs->pdrv = LD2PD(vol); /* Volume hosting physical drive */
3414 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */
3415 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
3416 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
3417 }
3418 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
3419 return FR_WRITE_PROTECTED;
3420 }
3421 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
3422 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
3423 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
3424 #endif
3425
3426 /* Find an FAT volume on the drive */
3427 fmt = find_volume(fs, LD2PT(vol));
3428 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
3429 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
3430 bsect = fs->winsect; /* Volume location */
3431
3432 /* An FAT volume is found (bsect). Following code initializes the filesystem object */
3433
3434 #if FF_FS_EXFAT
3435 if (fmt == 1) {
3436 QWORD maxlba;
3437 DWORD so, cv, bcl, i;
3438
3439 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
3440 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
3441
3442 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */
3443
3444 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
3445 return FR_NO_FILESYSTEM;
3446 }
3447
3448 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA + 1 of the volume */
3449 if (!FF_LBA64 && maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be handled in 32-bit LBA) */
3450
3451 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
3452
3453 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
3454 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
3455
3456 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
3457 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768) */
3458
3459 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
3460 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
3461 fs->n_fatent = nclst + 2;
3462
3463 /* Boundaries and Limits */
3464 fs->volbase = bsect;
3465 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
3466 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
3467 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */
3468 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
3469
3470 /* Get bitmap location and check if it is contiguous (implementation assumption) */
3471 so = i = 0;
3472 for (;;) { /* Find the bitmap entry in the root directory (in only first cluster) */
3473 if (i == 0) {
3474 if (so >= fs->csize) return FR_NO_FILESYSTEM; /* Not found? */
3475 if (move_window(fs, clst2sect(fs, (DWORD)fs->dirbase) + so) != FR_OK) return FR_DISK_ERR;
3476 so++;
3477 }
3478 if (fs->win[i] == ET_BITMAP) break; /* Is it a bitmap entry? */
3479 i = (i + SZDIRE) % SS(fs); /* Next entry */
3480 }
3481 bcl = ld_dword(fs->win + i + 20); /* Bitmap cluster */
3482 if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM;
3483 fs->bitbase = fs->database + fs->csize * (bcl - 2); /* Bitmap sector */
3484 for (;;) { /* Check if bitmap is contiguous */
3485 if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR;
3486 cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4);
3487 if (cv == 0xFFFFFFFF) break; /* Last link? */
3488 if (cv != ++bcl) return FR_NO_FILESYSTEM; /* Fragmented? */
3489 }
3490
3491 #if !FF_FS_READONLY
3492 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3493 #endif
3494 fmt = FS_EXFAT; /* FAT sub-type */
3495 } else
3496 #endif /* FF_FS_EXFAT */
3497 {
3498 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
3499
3500 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
3501 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
3502 fs->fsize = fasize;
3503
3504 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
3505 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
3506 fasize *= fs->n_fats; /* Number of sectors for FAT area */
3507
3508 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
3509 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
3510
3511 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
3512 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
3513
3514 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
3515 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
3516
3517 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
3518 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
3519
3520 /* Determine the FAT sub type */
3521 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */
3522 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3523 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
3524 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3525 fmt = 0;
3526 if (nclst <= MAX_FAT32) fmt = FS_FAT32;
3527 if (nclst <= MAX_FAT16) fmt = FS_FAT16;
3528 if (nclst <= MAX_FAT12) fmt = FS_FAT12;
3529 if (fmt == 0) return FR_NO_FILESYSTEM;
3530
3531 /* Boundaries and Limits */
3532 fs->n_fatent = nclst + 2; /* Number of FAT entries */
3533 fs->volbase = bsect; /* Volume start sector */
3534 fs->fatbase = bsect + nrsv; /* FAT start sector */
3535 fs->database = bsect + sysect; /* Data start sector */
3536 if (fmt == FS_FAT32) {
3537 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
3538 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
3539 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
3540 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
3541 } else {
3542 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
3543 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
3544 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
3545 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
3546 }
3547 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
3548
3549 #if !FF_FS_READONLY
3550 /* Get FSInfo if available */
3551 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3552 fs->fsi_flag = 0x80;
3553 #if (FF_FS_NOFSINFO & 3) != 3
3554 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */
3555 && ld_word(fs->win + BPB_FSInfo32) == 1
3556 && move_window(fs, bsect + 1) == FR_OK)
3557 {
3558 fs->fsi_flag = 0;
3559 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */
3560 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252
3561 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272)
3562 {
3563 #if (FF_FS_NOFSINFO & 1) == 0
3564 fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
3565 #endif
3566 #if (FF_FS_NOFSINFO & 2) == 0
3567 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
3568 #endif
3569 }
3570 }
3571 #endif /* (FF_FS_NOFSINFO & 3) != 3 */
3572 #endif /* !FF_FS_READONLY */
3573 }
3574
3575 fs->fs_type = (BYTE)fmt;/* FAT sub-type */
3576 fs->id = ++Fsid; /* Volume mount ID */
3577 #if FF_USE_LFN == 1
3578 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
3579 #if FF_FS_EXFAT
3580 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */
3581 #endif
3582 #endif
3583 #if FF_FS_RPATH != 0
3584 fs->cdir = 0; /* Initialize current directory */
3585 #endif
3586 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */
3587 clear_lock(fs);
3588 #endif
3589 return FR_OK;
3590 }
3591
3592
3593
3594
3595 /*-----------------------------------------------------------------------*/
3596 /* Check if the file/directory object is valid or not */
3597 /*-----------------------------------------------------------------------*/
3598
3599 static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
3600 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/DIR object, to check validity */
3601 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */
3602 )
3603 {
3604 FRESULT res = FR_INVALID_OBJECT;
3605
3606
3607 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */
3608 #if FF_FS_REENTRANT
3609 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */
3610 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3611 res = FR_OK;
3612 } else {
3613 unlock_fs(obj->fs, FR_OK);
3614 }
3615 } else {
3616 res = FR_TIMEOUT;
3617 }
3618 #else
3619 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3620 res = FR_OK;
3621 }
3622 #endif
3623 }
3624 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */
3625 return res;
3626 }
3627
3628
3629
3630
3631 /*---------------------------------------------------------------------------
3632
3633 Public Functions (FatFs API)
3634
3635 ----------------------------------------------------------------------------*/
3636
3637
3638
3639 /*-----------------------------------------------------------------------*/
3640 /* Mount/Unmount a Logical Drive */
3641 /*-----------------------------------------------------------------------*/
3642
3643 FRESULT f_mount (
3644 FATFS* fs, /* Pointer to the filesystem object (NULL:unmount)*/
3645 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
3646 BYTE opt /* Mode option 0:Do not mount (delayed mount), 1:Mount immediately */
3647 )
3648 {
3649 FATFS *cfs;
3650 int vol;
3651 FRESULT res;
3652 const TCHAR *rp = path;
3653
3654
3655 /* Get logical drive number */
3656 vol = get_ldnumber(&rp);
3657 if (vol < 0) return FR_INVALID_DRIVE;
3658 cfs = FatFs[vol]; /* Pointer to fs object */
3659
3660 if (cfs) {
3661 #if FF_FS_LOCK != 0
3662 clear_lock(cfs);
3663 #endif
3664 #if FF_FS_REENTRANT /* Discard sync object of the current volume */
3665 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
3666 #endif
3667 cfs->fs_type = 0; /* Clear old fs object */
3668 }
3669
3670 if (fs) {
3671 fs->fs_type = 0; /* Clear new fs object */
3672 #if FF_FS_REENTRANT /* Create sync object for the new volume */
3673 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
3674 #endif
3675 }
3676 FatFs[vol] = fs; /* Register new fs object */
3677
3678 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */
3679
3680 res = mount_volume(&path, &fs, 0); /* Force mounted the volume */
3681 LEAVE_FF(fs, res);
3682 }
3683
3684
3685
3686
3687 /*-----------------------------------------------------------------------*/
3688 /* Open or Create a File */
3689 /*-----------------------------------------------------------------------*/
3690
3691 FRESULT f_open (
3692 FIL* fp, /* Pointer to the blank file object */
3693 const TCHAR* path, /* Pointer to the file name */
3694 BYTE mode /* Access mode and file open mode flags */
3695 )
3696 {
3697 FRESULT res;
3698 DIR dj;
3699 FATFS *fs;
3700 #if !FF_FS_READONLY
3701 DWORD cl, bcs, clst;
3702 LBA_t sc;
3703 FSIZE_t ofs;
3704 #endif
3705 DEF_NAMBUF
3706
3707
3708 if (!fp) return FR_INVALID_OBJECT;
3709
3710 /* Get logical drive number */
3711 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND;
3712 res = mount_volume(&path, &fs, mode);
3713 if (res == FR_OK) {
3714 dj.obj.fs = fs;
3715 INIT_NAMBUF(fs);
3716 res = follow_path(&dj, path); /* Follow the file path */
3717 #if !FF_FS_READONLY /* Read/Write configuration */
3718 if (res == FR_OK) {
3719 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3720 res = FR_INVALID_NAME;
3721 }
3722 #if FF_FS_LOCK != 0
3723 else {
3724 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */
3725 }
3726 #endif
3727 }
3728 /* Create or Open a file */
3729 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
3730 if (res != FR_OK) { /* No file, create new */
3731 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */
3732 #if FF_FS_LOCK != 0
3733 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
3734 #else
3735 res = dir_register(&dj);
3736 #endif
3737 }
3738 mode |= FA_CREATE_ALWAYS; /* File is created */
3739 }
3740 else { /* Any object with the same name is already existing */
3741 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
3742 res = FR_DENIED;
3743 } else {
3744 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
3745 }
3746 }
3747 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */
3748 #if FF_FS_EXFAT
3749 if (fs->fs_type == FS_EXFAT) {
3750 /* Get current allocation info */
3751 fp->obj.fs = fs;
3752 init_alloc_info(fs, &fp->obj);
3753 /* Set directory entry block initial state */
3754 mem_set(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */
3755 mem_set(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */
3756 fs->dirbuf[XDIR_Attr] = AM_ARC;
3757 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());
3758 fs->dirbuf[XDIR_GenFlags] = 1;
3759 res = store_xdir(&dj);
3760 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */
3761 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
3762 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */
3763 }
3764 } else
3765 #endif
3766 {
3767 /* Set directory entry initial state */
3768 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */
3769 st_dword(dj.dir + DIR_CrtTime, GET_FATTIME()); /* Set created time */
3770 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
3771 st_clust(fs, dj.dir, 0); /* Reset file allocation info */
3772 st_dword(dj.dir + DIR_FileSize, 0);
3773 fs->wflag = 1;
3774 if (cl != 0) { /* Remove the cluster chain if exist */
3775 sc = fs->winsect;
3776 res = remove_chain(&dj.obj, cl, 0);
3777 if (res == FR_OK) {
3778 res = move_window(fs, sc);
3779 fs->last_clst = cl - 1; /* Reuse the cluster hole */
3780 }
3781 }
3782 }
3783 }
3784 }
3785 else { /* Open an existing file */
3786 if (res == FR_OK) { /* Is the object exsiting? */
3787 if (dj.obj.attr & AM_DIR) { /* File open against a directory */
3788 res = FR_NO_FILE;
3789 } else {
3790 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */
3791 res = FR_DENIED;
3792 }
3793 }
3794 }
3795 }
3796 if (res == FR_OK) {
3797 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */
3798 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
3799 fp->dir_ptr = dj.dir;
3800 #if FF_FS_LOCK != 0
3801 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */
3802 if (fp->obj.lockid == 0) res = FR_INT_ERR;
3803 #endif
3804 }
3805 #else /* R/O configuration */
3806 if (res == FR_OK) {
3807 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */
3808 res = FR_INVALID_NAME;
3809 } else {
3810 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */
3811 res = FR_NO_FILE;
3812 }
3813 }
3814 }
3815 #endif
3816
3817 if (res == FR_OK) {
3818 #if FF_FS_EXFAT
3819 if (fs->fs_type == FS_EXFAT) {
3820 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */
3821 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3822 fp->obj.c_ofs = dj.blk_ofs;
3823 init_alloc_info(fs, &fp->obj);
3824 } else
3825 #endif
3826 {
3827 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */
3828 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
3829 }
3830 #if FF_USE_FASTSEEK
3831 fp->cltbl = 0; /* Disable fast seek mode */
3832 #endif
3833 fp->obj.fs = fs; /* Validate the file object */
3834 fp->obj.id = fs->id;
3835 fp->flag = mode; /* Set file access mode */
3836 fp->err = 0; /* Clear error flag */
3837 fp->sect = 0; /* Invalidate current data sector */
3838 fp->fptr = 0; /* Set file pointer top of the file */
3839 #if !FF_FS_READONLY
3840 #if !FF_FS_TINY
3841 mem_set(fp->buf, 0, sizeof fp->buf); /* Clear sector buffer */
3842 #endif
3843 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
3844 fp->fptr = fp->obj.objsize; /* Offset to seek */
3845 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
3846 clst = fp->obj.sclust; /* Follow the cluster chain */
3847 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
3848 clst = get_fat(&fp->obj, clst);
3849 if (clst <= 1) res = FR_INT_ERR;
3850 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
3851 }
3852 fp->clust = clst;
3853 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
3854 sc = clst2sect(fs, clst);
3855 if (sc == 0) {
3856 res = FR_INT_ERR;
3857 } else {
3858 fp->sect = sc + (DWORD)(ofs / SS(fs));
3859 #if !FF_FS_TINY
3860 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
3861 #endif
3862 }
3863 }
3864 }
3865 #endif
3866 }
3867
3868 FREE_NAMBUF();
3869 }
3870
3871 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
3872
3873 LEAVE_FF(fs, res);
3874 }
3875
3876
3877
3878
3879 /*-----------------------------------------------------------------------*/
3880 /* Read File */
3881 /*-----------------------------------------------------------------------*/
3882
3883 FRESULT f_read (
3884 FIL* fp, /* Pointer to the file object */
3885 void* buff, /* Pointer to data buffer */
3886 UINT btr, /* Number of bytes to read */
3887 UINT* br /* Pointer to number of bytes read */
3888 )
3889 {
3890 FRESULT res;
3891 FATFS *fs;
3892 DWORD clst;
3893 LBA_t sect;
3894 FSIZE_t remain;
3895 UINT rcnt, cc, csect;
3896 BYTE *rbuff = (BYTE*)buff;
3897
3898
3899 *br = 0; /* Clear read byte counter */
3900 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3901 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3902 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3903 remain = fp->obj.objsize - fp->fptr;
3904 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3905
3906 for ( ; btr; /* Repeat until btr bytes read */
3907 btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) {
3908 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3909 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
3910 if (csect == 0) { /* On the cluster boundary? */
3911 if (fp->fptr == 0) { /* On the top of the file? */
3912 clst = fp->obj.sclust; /* Follow cluster chain from the origin */
3913 } else { /* Middle or end of the file */
3914 #if FF_USE_FASTSEEK
3915 if (fp->cltbl) {
3916 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3917 } else
3918 #endif
3919 {
3920 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
3921 }
3922 }
3923 if (clst < 2) ABORT(fs, FR_INT_ERR);
3924 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3925 fp->clust = clst; /* Update current cluster */
3926 }
3927 sect = clst2sect(fs, fp->clust); /* Get current sector */
3928 if (sect == 0) ABORT(fs, FR_INT_ERR);
3929 sect += csect;
3930 cc = btr / SS(fs); /* When remaining bytes >= sector size, */
3931 if (cc > 0) { /* Read maximum contiguous sectors directly */
3932 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3933 cc = fs->csize - csect;
3934 }
3935 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3936 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
3937 #if FF_FS_TINY
3938 if (fs->wflag && fs->winsect - sect < cc) {
3939 mem_cpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
3940 }
3941 #else
3942 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
3943 mem_cpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
3944 }
3945 #endif
3946 #endif
3947 rcnt = SS(fs) * cc; /* Number of bytes transferred */
3948 continue;
3949 }
3950 #if !FF_FS_TINY
3951 if (fp->sect != sect) { /* Load data sector if not in cache */
3952 #if !FF_FS_READONLY
3953 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3954 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3955 fp->flag &= (BYTE)~FA_DIRTY;
3956 }
3957 #endif
3958 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
3959 }
3960 #endif
3961 fp->sect = sect;
3962 }
3963 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
3964 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
3965 #if FF_FS_TINY
3966 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3967 mem_cpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3968 #else
3969 mem_cpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3970 #endif
3971 }
3972
3973 LEAVE_FF(fs, FR_OK);
3974 }
3975
3976
3977
3978
3979 #if !FF_FS_READONLY
3980 /*-----------------------------------------------------------------------*/
3981 /* Write File */
3982 /*-----------------------------------------------------------------------*/
3983
3984 FRESULT f_write (
3985 FIL* fp, /* Pointer to the file object */
3986 const void* buff, /* Pointer to the data to be written */
3987 UINT btw, /* Number of bytes to write */
3988 UINT* bw /* Pointer to number of bytes written */
3989 )
3990 {
3991 FRESULT res;
3992 FATFS *fs;
3993 DWORD clst;
3994 LBA_t sect;
3995 UINT wcnt, cc, csect;
3996 const BYTE *wbuff = (const BYTE*)buff;
3997
3998
3999 *bw = 0; /* Clear write byte counter */
4000 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4001 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
4002 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4003
4004 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */
4005 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
4006 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
4007 }
4008
4009 for ( ; btw; /* Repeat until all data written */
4010 btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) {
4011 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
4012 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
4013 if (csect == 0) { /* On the cluster boundary? */
4014 if (fp->fptr == 0) { /* On the top of the file? */
4015 clst = fp->obj.sclust; /* Follow from the origin */
4016 if (clst == 0) { /* If no cluster is allocated, */
4017 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
4018 }
4019 } else { /* On the middle or end of the file */
4020 #if FF_USE_FASTSEEK
4021 if (fp->cltbl) {
4022 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
4023 } else
4024 #endif
4025 {
4026 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
4027 }
4028 }
4029 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
4030 if (clst == 1) ABORT(fs, FR_INT_ERR);
4031 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4032 fp->clust = clst; /* Update current cluster */
4033 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
4034 }
4035 #if FF_FS_TINY
4036 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
4037 #else
4038 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
4039 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4040 fp->flag &= (BYTE)~FA_DIRTY;
4041 }
4042 #endif
4043 sect = clst2sect(fs, fp->clust); /* Get current sector */
4044 if (sect == 0) ABORT(fs, FR_INT_ERR);
4045 sect += csect;
4046 cc = btw / SS(fs); /* When remaining bytes >= sector size, */
4047 if (cc > 0) { /* Write maximum contiguous sectors directly */
4048 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
4049 cc = fs->csize - csect;
4050 }
4051 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
4052 #if FF_FS_MINIMIZE <= 2
4053 #if FF_FS_TINY
4054 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4055 mem_cpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
4056 fs->wflag = 0;
4057 }
4058 #else
4059 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4060 mem_cpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
4061 fp->flag &= (BYTE)~FA_DIRTY;
4062 }
4063 #endif
4064 #endif
4065 wcnt = SS(fs) * cc; /* Number of bytes transferred */
4066 continue;
4067 }
4068 #if FF_FS_TINY
4069 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
4070 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
4071 fs->winsect = sect;
4072 }
4073 #else
4074 if (fp->sect != sect && /* Fill sector cache with file data */
4075 fp->fptr < fp->obj.objsize &&
4076 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {
4077 ABORT(fs, FR_DISK_ERR);
4078 }
4079 #endif
4080 fp->sect = sect;
4081 }
4082 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
4083 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
4084 #if FF_FS_TINY
4085 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
4086 mem_cpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4087 fs->wflag = 1;
4088 #else
4089 mem_cpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4090 fp->flag |= FA_DIRTY;
4091 #endif
4092 }
4093
4094 fp->flag |= FA_MODIFIED; /* Set file change flag */
4095
4096 LEAVE_FF(fs, FR_OK);
4097 }
4098
4099
4100
4101
4102 /*-----------------------------------------------------------------------*/
4103 /* Synchronize the File */
4104 /*-----------------------------------------------------------------------*/
4105
4106 FRESULT f_sync (
4107 FIL* fp /* Pointer to the file object */
4108 )
4109 {
4110 FRESULT res;
4111 FATFS *fs;
4112 DWORD tm;
4113 BYTE *dir;
4114
4115
4116 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4117 if (res == FR_OK) {
4118 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
4119 #if !FF_FS_TINY
4120 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
4121 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
4122 fp->flag &= (BYTE)~FA_DIRTY;
4123 }
4124 #endif
4125 /* Update the directory entry */
4126 tm = GET_FATTIME(); /* Modified time */
4127 #if FF_FS_EXFAT
4128 if (fs->fs_type == FS_EXFAT) {
4129 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */
4130 if (res == FR_OK) {
4131 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4132 }
4133 if (res == FR_OK) {
4134 DIR dj;
4135 DEF_NAMBUF
4136
4137 INIT_NAMBUF(fs);
4138 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */
4139 if (res == FR_OK) {
4140 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4141 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */
4142 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); /* Update start cluster */
4143 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); /* Update file size */
4144 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); /* (FatFs does not support Valid File Size feature) */
4145 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
4146 fs->dirbuf[XDIR_ModTime10] = 0;
4147 st_dword(fs->dirbuf + XDIR_AccTime, 0);
4148 res = store_xdir(&dj); /* Restore it to the directory */
4149 if (res == FR_OK) {
4150 res = sync_fs(fs);
4151 fp->flag &= (BYTE)~FA_MODIFIED;
4152 }
4153 }
4154 FREE_NAMBUF();
4155 }
4156 } else
4157 #endif
4158 {
4159 res = move_window(fs, fp->dir_sect);
4160 if (res == FR_OK) {
4161 dir = fp->dir_ptr;
4162 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4163 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */
4164 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
4165 st_dword(dir + DIR_ModTime, tm); /* Update modified time */
4166 st_word(dir + DIR_LstAccDate, 0);
4167 fs->wflag = 1;
4168 res = sync_fs(fs); /* Restore it to the directory */
4169 fp->flag &= (BYTE)~FA_MODIFIED;
4170 }
4171 }
4172 }
4173 }
4174
4175 LEAVE_FF(fs, res);
4176 }
4177
4178 #endif /* !FF_FS_READONLY */
4179
4180
4181
4182
4183 /*-----------------------------------------------------------------------*/
4184 /* Close File */
4185 /*-----------------------------------------------------------------------*/
4186
4187 FRESULT f_close (
4188 FIL* fp /* Pointer to the file object to be closed */
4189 )
4190 {
4191 FRESULT res;
4192 FATFS *fs;
4193
4194 #if !FF_FS_READONLY
4195 res = f_sync(fp); /* Flush cached data */
4196 if (res == FR_OK)
4197 #endif
4198 {
4199 res = validate(&fp->obj, &fs); /* Lock volume */
4200 if (res == FR_OK) {
4201 #if FF_FS_LOCK != 0
4202 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */
4203 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */
4204 #else
4205 fp->obj.fs = 0; /* Invalidate file object */
4206 #endif
4207 #if FF_FS_REENTRANT
4208 unlock_fs(fs, FR_OK); /* Unlock volume */
4209 #endif
4210 }
4211 }
4212 return res;
4213 }
4214
4215
4216
4217
4218 #if FF_FS_RPATH >= 1
4219 /*-----------------------------------------------------------------------*/
4220 /* Change Current Directory or Current Drive, Get Current Directory */
4221 /*-----------------------------------------------------------------------*/
4222
4223 FRESULT f_chdrive (
4224 const TCHAR* path /* Drive number to set */
4225 )
4226 {
4227 int vol;
4228
4229
4230 /* Get logical drive number */
4231 vol = get_ldnumber(&path);
4232 if (vol < 0) return FR_INVALID_DRIVE;
4233 CurrVol = (BYTE)vol; /* Set it as current volume */
4234
4235 return FR_OK;
4236 }
4237
4238
4239
4240 FRESULT f_chdir (
4241 const TCHAR* path /* Pointer to the directory path */
4242 )
4243 {
4244 #if FF_STR_VOLUME_ID == 2
4245 UINT i;
4246 #endif
4247 FRESULT res;
4248 DIR dj;
4249 FATFS *fs;
4250 DEF_NAMBUF
4251
4252
4253 /* Get logical drive */
4254 res = mount_volume(&path, &fs, 0);
4255 if (res == FR_OK) {
4256 dj.obj.fs = fs;
4257 INIT_NAMBUF(fs);
4258 res = follow_path(&dj, path); /* Follow the path */
4259 if (res == FR_OK) { /* Follow completed */
4260 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it the start directory itself? */
4261 fs->cdir = dj.obj.sclust;
4262 #if FF_FS_EXFAT
4263 if (fs->fs_type == FS_EXFAT) {
4264 fs->cdc_scl = dj.obj.c_scl;
4265 fs->cdc_size = dj.obj.c_size;
4266 fs->cdc_ofs = dj.obj.c_ofs;
4267 }
4268 #endif
4269 } else {
4270 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
4271 #if FF_FS_EXFAT
4272 if (fs->fs_type == FS_EXFAT) {
4273 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
4274 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
4275 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
4276 fs->cdc_ofs = dj.blk_ofs;
4277 } else
4278 #endif
4279 {
4280 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
4281 }
4282 } else {
4283 res = FR_NO_PATH; /* Reached but a file */
4284 }
4285 }
4286 }
4287 FREE_NAMBUF();
4288 if (res == FR_NO_FILE) res = FR_NO_PATH;
4289 #if FF_STR_VOLUME_ID == 2 /* Also current drive is changed at Unix style volume ID */
4290 if (res == FR_OK) {
4291 for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ; /* Set current drive */
4292 CurrVol = (BYTE)i;
4293 }
4294 #endif
4295 }
4296
4297 LEAVE_FF(fs, res);
4298 }
4299
4300
4301 #if FF_FS_RPATH >= 2
4302 FRESULT f_getcwd (
4303 TCHAR* buff, /* Pointer to the directory path */
4304 UINT len /* Size of buff in unit of TCHAR */
4305 )
4306 {
4307 FRESULT res;
4308 DIR dj;
4309 FATFS *fs;
4310 UINT i, n;
4311 DWORD ccl;
4312 TCHAR *tp = buff;
4313 #if FF_VOLUMES >= 2
4314 UINT vl;
4315 #if FF_STR_VOLUME_ID
4316 const char *vp;
4317 #endif
4318 #endif
4319 FILINFO fno;
4320 DEF_NAMBUF
4321
4322
4323 /* Get logical drive */
4324 buff[0] = 0; /* Set null string to get current volume */
4325 res = mount_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
4326 if (res == FR_OK) {
4327 dj.obj.fs = fs;
4328 INIT_NAMBUF(fs);
4329
4330 /* Follow parent directories and create the path */
4331 i = len; /* Bottom of buffer (directory stack base) */
4332 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
4333 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
4334 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
4335 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
4336 if (res != FR_OK) break;
4337 res = move_window(fs, dj.sect);
4338 if (res != FR_OK) break;
4339 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
4340 res = dir_sdi(&dj, 0);
4341 if (res != FR_OK) break;
4342 do { /* Find the entry links to the child directory */
4343 res = DIR_READ_FILE(&dj);
4344 if (res != FR_OK) break;
4345 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
4346 res = dir_next(&dj, 0);
4347 } while (res == FR_OK);
4348 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
4349 if (res != FR_OK) break;
4350 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
4351 for (n = 0; fno.fname[n]; n++) ; /* Name length */
4352 if (i < n + 1) { /* Insufficient space to store the path name? */
4353 res = FR_NOT_ENOUGH_CORE; break;
4354 }
4355 while (n) buff[--i] = fno.fname[--n]; /* Stack the name */
4356 buff[--i] = '/';
4357 }
4358 }
4359 if (res == FR_OK) {
4360 if (i == len) buff[--i] = '/'; /* Is it the root-directory? */
4361 #if FF_VOLUMES >= 2 /* Put drive prefix */
4362 vl = 0;
4363 #if FF_STR_VOLUME_ID >= 1 /* String volume ID */
4364 for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ;
4365 if (i >= n + 2) {
4366 if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/';
4367 for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ;
4368 if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':';
4369 vl++;
4370 }
4371 #else /* Numeric volume ID */
4372 if (i >= 3) {
4373 *tp++ = (TCHAR)'0' + CurrVol;
4374 *tp++ = (TCHAR)':';
4375 vl = 2;
4376 }
4377 #endif
4378 if (vl == 0) res = FR_NOT_ENOUGH_CORE;
4379 #endif
4380 /* Add current directory path */
4381 if (res == FR_OK) {
4382 do *tp++ = buff[i++]; while (i < len); /* Copy stacked path string */
4383 }
4384 }
4385 FREE_NAMBUF();
4386 }
4387
4388 *tp = 0;
4389 LEAVE_FF(fs, res);
4390 }
4391
4392 #endif /* FF_FS_RPATH >= 2 */
4393 #endif /* FF_FS_RPATH >= 1 */
4394
4395
4396
4397 #if FF_FS_MINIMIZE <= 2
4398 /*-----------------------------------------------------------------------*/
4399 /* Seek File Read/Write Pointer */
4400 /*-----------------------------------------------------------------------*/
4401
4402 FRESULT f_lseek (
4403 FIL* fp, /* Pointer to the file object */
4404 FSIZE_t ofs /* File pointer from top of file */
4405 )
4406 {
4407 FRESULT res;
4408 FATFS *fs;
4409 DWORD clst, bcs;
4410 LBA_t nsect;
4411 FSIZE_t ifptr;
4412 #if FF_USE_FASTSEEK
4413 DWORD cl, pcl, ncl, tcl, tlen, ulen, *tbl;
4414 LBA_t dsc;
4415 #endif
4416
4417 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4418 if (res == FR_OK) res = (FRESULT)fp->err;
4419 #if FF_FS_EXFAT && !FF_FS_READONLY
4420 if (res == FR_OK && fs->fs_type == FS_EXFAT) {
4421 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4422 }
4423 #endif
4424 if (res != FR_OK) LEAVE_FF(fs, res);
4425
4426 #if FF_USE_FASTSEEK
4427 if (fp->cltbl) { /* Fast seek */
4428 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
4429 tbl = fp->cltbl;
4430 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
4431 cl = fp->obj.sclust; /* Origin of the chain */
4432 if (cl != 0) {
4433 do {
4434 /* Get a fragment */
4435 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
4436 do {
4437 pcl = cl; ncl++;
4438 cl = get_fat(&fp->obj, cl);
4439 if (cl <= 1) ABORT(fs, FR_INT_ERR);
4440 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4441 } while (cl == pcl + 1);
4442 if (ulen <= tlen) { /* Store the length and top of the fragment */
4443 *tbl++ = ncl; *tbl++ = tcl;
4444 }
4445 } while (cl < fs->n_fatent); /* Repeat until end of chain */
4446 }
4447 *fp->cltbl = ulen; /* Number of items used */
4448 if (ulen <= tlen) {
4449 *tbl = 0; /* Terminate table */
4450 } else {
4451 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
4452 }
4453 } else { /* Fast seek */
4454 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
4455 fp->fptr = ofs; /* Set file pointer */
4456 if (ofs > 0) {
4457 fp->clust = clmt_clust(fp, ofs - 1);
4458 dsc = clst2sect(fs, fp->clust);
4459 if (dsc == 0) ABORT(fs, FR_INT_ERR);
4460 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
4461 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
4462 #if !FF_FS_TINY
4463 #if !FF_FS_READONLY
4464 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4465 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4466 fp->flag &= (BYTE)~FA_DIRTY;
4467 }
4468 #endif
4469 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
4470 #endif
4471 fp->sect = dsc;
4472 }
4473 }
4474 }
4475 } else
4476 #endif
4477
4478 /* Normal Seek */
4479 {
4480 #if FF_FS_EXFAT
4481 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */
4482 #endif
4483 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
4484 ofs = fp->obj.objsize;
4485 }
4486 ifptr = fp->fptr;
4487 fp->fptr = nsect = 0;
4488 if (ofs > 0) {
4489 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
4490 if (ifptr > 0 &&
4491 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
4492 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
4493 ofs -= fp->fptr;
4494 clst = fp->clust;
4495 } else { /* When seek to back cluster, */
4496 clst = fp->obj.sclust; /* start from the first cluster */
4497 #if !FF_FS_READONLY
4498 if (clst == 0) { /* If no cluster chain, create a new chain */
4499 clst = create_chain(&fp->obj, 0);
4500 if (clst == 1) ABORT(fs, FR_INT_ERR);
4501 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4502 fp->obj.sclust = clst;
4503 }
4504 #endif
4505 fp->clust = clst;
4506 }
4507 if (clst != 0) {
4508 while (ofs > bcs) { /* Cluster following loop */
4509 ofs -= bcs; fp->fptr += bcs;
4510 #if !FF_FS_READONLY
4511 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
4512 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
4513 fp->obj.objsize = fp->fptr;
4514 fp->flag |= FA_MODIFIED;
4515 }
4516 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
4517 if (clst == 0) { /* Clip file size in case of disk full */
4518 ofs = 0; break;
4519 }
4520 } else
4521 #endif
4522 {
4523 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
4524 }
4525 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4526 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
4527 fp->clust = clst;
4528 }
4529 fp->fptr += ofs;
4530 if (ofs % SS(fs)) {
4531 nsect = clst2sect(fs, clst); /* Current sector */
4532 if (nsect == 0) ABORT(fs, FR_INT_ERR);
4533 nsect += (DWORD)(ofs / SS(fs));
4534 }
4535 }
4536 }
4537 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
4538 fp->obj.objsize = fp->fptr;
4539 fp->flag |= FA_MODIFIED;
4540 }
4541 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
4542 #if !FF_FS_TINY
4543 #if !FF_FS_READONLY
4544 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4545 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4546 fp->flag &= (BYTE)~FA_DIRTY;
4547 }
4548 #endif
4549 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4550 #endif
4551 fp->sect = nsect;
4552 }
4553 }
4554
4555 LEAVE_FF(fs, res);
4556 }
4557
4558
4559
4560 #if FF_FS_MINIMIZE <= 1
4561 /*-----------------------------------------------------------------------*/
4562 /* Create a Directory Object */
4563 /*-----------------------------------------------------------------------*/
4564
4565 FRESULT f_opendir (
4566 DIR* dp, /* Pointer to directory object to create */
4567 const TCHAR* path /* Pointer to the directory path */
4568 )
4569 {
4570 FRESULT res;
4571 FATFS *fs;
4572 DEF_NAMBUF
4573
4574
4575 if (!dp) return FR_INVALID_OBJECT;
4576
4577 /* Get logical drive */
4578 res = mount_volume(&path, &fs, 0);
4579 if (res == FR_OK) {
4580 dp->obj.fs = fs;
4581 INIT_NAMBUF(fs);
4582 res = follow_path(dp, path); /* Follow the path to the directory */
4583 if (res == FR_OK) { /* Follow completed */
4584 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
4585 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */
4586 #if FF_FS_EXFAT
4587 if (fs->fs_type == FS_EXFAT) {
4588 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */
4589 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
4590 dp->obj.c_ofs = dp->blk_ofs;
4591 init_alloc_info(fs, &dp->obj); /* Get object allocation info */
4592 } else
4593 #endif
4594 {
4595 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */
4596 }
4597 } else { /* This object is a file */
4598 res = FR_NO_PATH;
4599 }
4600 }
4601 if (res == FR_OK) {
4602 dp->obj.id = fs->id;
4603 res = dir_sdi(dp, 0); /* Rewind directory */
4604 #if FF_FS_LOCK != 0
4605 if (res == FR_OK) {
4606 if (dp->obj.sclust != 0) {
4607 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */
4608 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;
4609 } else {
4610 dp->obj.lockid = 0; /* Root directory need not to be locked */
4611 }
4612 }
4613 #endif
4614 }
4615 }
4616 FREE_NAMBUF();
4617 if (res == FR_NO_FILE) res = FR_NO_PATH;
4618 }
4619 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */
4620
4621 LEAVE_FF(fs, res);
4622 }
4623
4624
4625
4626
4627 /*-----------------------------------------------------------------------*/
4628 /* Close Directory */
4629 /*-----------------------------------------------------------------------*/
4630
4631 FRESULT f_closedir (
4632 DIR *dp /* Pointer to the directory object to be closed */
4633 )
4634 {
4635 FRESULT res;
4636 FATFS *fs;
4637
4638
4639 res = validate(&dp->obj, &fs); /* Check validity of the file object */
4640 if (res == FR_OK) {
4641 #if FF_FS_LOCK != 0
4642 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */
4643 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */
4644 #else
4645 dp->obj.fs = 0; /* Invalidate directory object */
4646 #endif
4647 #if FF_FS_REENTRANT
4648 unlock_fs(fs, FR_OK); /* Unlock volume */
4649 #endif
4650 }
4651 return res;
4652 }
4653
4654
4655
4656
4657 /*-----------------------------------------------------------------------*/
4658 /* Read Directory Entries in Sequence */
4659 /*-----------------------------------------------------------------------*/
4660
4661 FRESULT f_readdir (
4662 DIR* dp, /* Pointer to the open directory object */
4663 FILINFO* fno /* Pointer to file information to return */
4664 )
4665 {
4666 FRESULT res;
4667 FATFS *fs;
4668 DEF_NAMBUF
4669
4670
4671 res = validate(&dp->obj, &fs); /* Check validity of the directory object */
4672 if (res == FR_OK) {
4673 if (!fno) {
4674 res = dir_sdi(dp, 0); /* Rewind the directory object */
4675 } else {
4676 INIT_NAMBUF(fs);
4677 res = DIR_READ_FILE(dp); /* Read an item */
4678 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
4679 if (res == FR_OK) { /* A valid entry is found */
4680 get_fileinfo(dp, fno); /* Get the object information */
4681 res = dir_next(dp, 0); /* Increment index for next */
4682 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
4683 }
4684 FREE_NAMBUF();
4685 }
4686 }
4687 LEAVE_FF(fs, res);
4688 }
4689
4690
4691
4692 #if FF_USE_FIND
4693 /*-----------------------------------------------------------------------*/
4694 /* Find Next File */
4695 /*-----------------------------------------------------------------------*/
4696
4697 FRESULT f_findnext (
4698 DIR* dp, /* Pointer to the open directory object */
4699 FILINFO* fno /* Pointer to the file information structure */
4700 )
4701 {
4702 FRESULT res;
4703
4704
4705 for (;;) {
4706 res = f_readdir(dp, fno); /* Get a directory item */
4707 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
4708 if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for the file name */
4709 #if FF_USE_LFN && FF_USE_FIND == 2
4710 if (pattern_matching(dp->pat, fno->altname, 0, 0)) break; /* Test for alternative name if exist */
4711 #endif
4712 }
4713 return res;
4714 }
4715
4716
4717
4718 /*-----------------------------------------------------------------------*/
4719 /* Find First File */
4720 /*-----------------------------------------------------------------------*/
4721
4722 FRESULT f_findfirst (
4723 DIR* dp, /* Pointer to the blank directory object */
4724 FILINFO* fno, /* Pointer to the file information structure */
4725 const TCHAR* path, /* Pointer to the directory to open */
4726 const TCHAR* pattern /* Pointer to the matching pattern */
4727 )
4728 {
4729 FRESULT res;
4730
4731
4732 dp->pat = pattern; /* Save pointer to pattern string */
4733 res = f_opendir(dp, path); /* Open the target directory */
4734 if (res == FR_OK) {
4735 res = f_findnext(dp, fno); /* Find the first item */
4736 }
4737 return res;
4738 }
4739
4740 #endif /* FF_USE_FIND */
4741
4742
4743
4744 #if FF_FS_MINIMIZE == 0
4745 /*-----------------------------------------------------------------------*/
4746 /* Get File Status */
4747 /*-----------------------------------------------------------------------*/
4748
4749 FRESULT f_stat (
4750 const TCHAR* path, /* Pointer to the file path */
4751 FILINFO* fno /* Pointer to file information to return */
4752 )
4753 {
4754 FRESULT res;
4755 DIR dj;
4756 DEF_NAMBUF
4757
4758
4759 /* Get logical drive */
4760 res = mount_volume(&path, &dj.obj.fs, 0);
4761 if (res == FR_OK) {
4762 INIT_NAMBUF(dj.obj.fs);
4763 res = follow_path(&dj, path); /* Follow the file path */
4764 if (res == FR_OK) { /* Follow completed */
4765 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
4766 res = FR_INVALID_NAME;
4767 } else { /* Found an object */
4768 if (fno) get_fileinfo(&dj, fno);
4769 }
4770 }
4771 FREE_NAMBUF();
4772 }
4773
4774 LEAVE_FF(dj.obj.fs, res);
4775 }
4776
4777
4778
4779 #if !FF_FS_READONLY
4780 /*-----------------------------------------------------------------------*/
4781 /* Get Number of Free Clusters */
4782 /*-----------------------------------------------------------------------*/
4783
4784 FRESULT f_getfree (
4785 const TCHAR* path, /* Logical drive number */
4786 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
4787 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */
4788 )
4789 {
4790 FRESULT res;
4791 FATFS *fs;
4792 DWORD nfree, clst, stat;
4793 LBA_t sect;
4794 UINT i;
4795 FFOBJID obj;
4796
4797
4798 /* Get logical drive */
4799 res = mount_volume(&path, &fs, 0);
4800 if (res == FR_OK) {
4801 *fatfs = fs; /* Return ptr to the fs object */
4802 /* If free_clst is valid, return it without full FAT scan */
4803 if (fs->free_clst <= fs->n_fatent - 2) {
4804 *nclst = fs->free_clst;
4805 } else {
4806 /* Scan FAT to obtain number of free clusters */
4807 nfree = 0;
4808 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */
4809 clst = 2; obj.fs = fs;
4810 do {
4811 stat = get_fat(&obj, clst);
4812 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
4813 if (stat == 1) { res = FR_INT_ERR; break; }
4814 if (stat == 0) nfree++;
4815 } while (++clst < fs->n_fatent);
4816 } else {
4817 #if FF_FS_EXFAT
4818 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */
4819 BYTE bm;
4820 UINT b;
4821
4822 clst = fs->n_fatent - 2; /* Number of clusters */
4823 sect = fs->bitbase; /* Bitmap sector */
4824 i = 0; /* Offset in the sector */
4825 do { /* Counts numbuer of bits with zero in the bitmap */
4826 if (i == 0) {
4827 res = move_window(fs, sect++);
4828 if (res != FR_OK) break;
4829 }
4830 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
4831 if (!(bm & 1)) nfree++;
4832 bm >>= 1;
4833 }
4834 i = (i + 1) % SS(fs);
4835 } while (clst);
4836 } else
4837 #endif
4838 { /* FAT16/32: Scan WORD/DWORD FAT entries */
4839 clst = fs->n_fatent; /* Number of entries */
4840 sect = fs->fatbase; /* Top of the FAT */
4841 i = 0; /* Offset in the sector */
4842 do { /* Counts numbuer of entries with zero in the FAT */
4843 if (i == 0) {
4844 res = move_window(fs, sect++);
4845 if (res != FR_OK) break;
4846 }
4847 if (fs->fs_type == FS_FAT16) {
4848 if (ld_word(fs->win + i) == 0) nfree++;
4849 i += 2;
4850 } else {
4851 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++;
4852 i += 4;
4853 }
4854 i %= SS(fs);
4855 } while (--clst);
4856 }
4857 }
4858 *nclst = nfree; /* Return the free clusters */
4859 fs->free_clst = nfree; /* Now free_clst is valid */
4860 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */
4861 }
4862 }
4863
4864 LEAVE_FF(fs, res);
4865 }
4866
4867
4868
4869
4870 /*-----------------------------------------------------------------------*/
4871 /* Truncate File */
4872 /*-----------------------------------------------------------------------*/
4873
4874 FRESULT f_truncate (
4875 FIL* fp /* Pointer to the file object */
4876 )
4877 {
4878 FRESULT res;
4879 FATFS *fs;
4880 DWORD ncl;
4881
4882
4883 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4884 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
4885 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4886
4887 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */
4888 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
4889 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
4890 fp->obj.sclust = 0;
4891 } else { /* When truncate a part of the file, remove remaining clusters */
4892 ncl = get_fat(&fp->obj, fp->clust);
4893 res = FR_OK;
4894 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
4895 if (ncl == 1) res = FR_INT_ERR;
4896 if (res == FR_OK && ncl < fs->n_fatent) {
4897 res = remove_chain(&fp->obj, ncl, fp->clust);
4898 }
4899 }
4900 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */
4901 fp->flag |= FA_MODIFIED;
4902 #if !FF_FS_TINY
4903 if (res == FR_OK && (fp->flag & FA_DIRTY)) {
4904 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {
4905 res = FR_DISK_ERR;
4906 } else {
4907 fp->flag &= (BYTE)~FA_DIRTY;
4908 }
4909 }
4910 #endif
4911 if (res != FR_OK) ABORT(fs, res);
4912 }
4913
4914 LEAVE_FF(fs, res);
4915 }
4916
4917
4918
4919
4920 /*-----------------------------------------------------------------------*/
4921 /* Delete a File/Directory */
4922 /*-----------------------------------------------------------------------*/
4923
4924 FRESULT f_unlink (
4925 const TCHAR* path /* Pointer to the file or directory path */
4926 )
4927 {
4928 FRESULT res;
4929 DIR dj, sdj;
4930 DWORD dclst = 0;
4931 FATFS *fs;
4932 #if FF_FS_EXFAT
4933 FFOBJID obj;
4934 #endif
4935 DEF_NAMBUF
4936
4937
4938 /* Get logical drive */
4939 res = mount_volume(&path, &fs, FA_WRITE);
4940 if (res == FR_OK) {
4941 dj.obj.fs = fs;
4942 INIT_NAMBUF(fs);
4943 res = follow_path(&dj, path); /* Follow the file path */
4944 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
4945 res = FR_INVALID_NAME; /* Cannot remove dot entry */
4946 }
4947 #if FF_FS_LOCK != 0
4948 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */
4949 #endif
4950 if (res == FR_OK) { /* The object is accessible */
4951 if (dj.fn[NSFLAG] & NS_NONAME) {
4952 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
4953 } else {
4954 if (dj.obj.attr & AM_RDO) {
4955 res = FR_DENIED; /* Cannot remove R/O object */
4956 }
4957 }
4958 if (res == FR_OK) {
4959 #if FF_FS_EXFAT
4960 obj.fs = fs;
4961 if (fs->fs_type == FS_EXFAT) {
4962 init_alloc_info(fs, &obj);
4963 dclst = obj.sclust;
4964 } else
4965 #endif
4966 {
4967 dclst = ld_clust(fs, dj.dir);
4968 }
4969 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */
4970 #if FF_FS_RPATH != 0
4971 if (dclst == fs->cdir) { /* Is it the current directory? */
4972 res = FR_DENIED;
4973 } else
4974 #endif
4975 {
4976 sdj.obj.fs = fs; /* Open the sub-directory */
4977 sdj.obj.sclust = dclst;
4978 #if FF_FS_EXFAT
4979 if (fs->fs_type == FS_EXFAT) {
4980 sdj.obj.objsize = obj.objsize;
4981 sdj.obj.stat = obj.stat;
4982 }
4983 #endif
4984 res = dir_sdi(&sdj, 0);
4985 if (res == FR_OK) {
4986 res = DIR_READ_FILE(&sdj); /* Test if the directory is empty */
4987 if (res == FR_OK) res = FR_DENIED; /* Not empty? */
4988 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
4989 }
4990 }
4991 }
4992 }
4993 if (res == FR_OK) {
4994 res = dir_remove(&dj); /* Remove the directory entry */
4995 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */
4996 #if FF_FS_EXFAT
4997 res = remove_chain(&obj, dclst, 0);
4998 #else
4999 res = remove_chain(&dj.obj, dclst, 0);
5000 #endif
5001 }
5002 if (res == FR_OK) res = sync_fs(fs);
5003 }
5004 }
5005 FREE_NAMBUF();
5006 }
5007
5008 LEAVE_FF(fs, res);
5009 }
5010
5011
5012
5013
5014 /*-----------------------------------------------------------------------*/
5015 /* Create a Directory */
5016 /*-----------------------------------------------------------------------*/
5017
5018 FRESULT f_mkdir (
5019 const TCHAR* path /* Pointer to the directory path */
5020 )
5021 {
5022 FRESULT res;
5023 DIR dj;
5024 FFOBJID sobj;
5025 FATFS *fs;
5026 DWORD dcl, pcl, tm;
5027 DEF_NAMBUF
5028
5029
5030 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5031 if (res == FR_OK) {
5032 dj.obj.fs = fs;
5033 INIT_NAMBUF(fs);
5034 res = follow_path(&dj, path); /* Follow the file path */
5035 if (res == FR_OK) res = FR_EXIST; /* Name collision? */
5036 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { /* Invalid name? */
5037 res = FR_INVALID_NAME;
5038 }
5039 if (res == FR_NO_FILE) { /* It is clear to create a new directory */
5040 sobj.fs = fs; /* New object id to create a new chain */
5041 dcl = create_chain(&sobj, 0); /* Allocate a cluster for the new directory */
5042 res = FR_OK;
5043 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster? */
5044 if (dcl == 1) res = FR_INT_ERR; /* Any insanity? */
5045 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; /* Disk error? */
5046 tm = GET_FATTIME();
5047 if (res == FR_OK) {
5048 res = dir_clear(fs, dcl); /* Clean up the new table */
5049 if (res == FR_OK) {
5050 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* Create dot entries (FAT only) */
5051 mem_set(fs->win + DIR_Name, ' ', 11); /* Create "." entry */
5052 fs->win[DIR_Name] = '.';
5053 fs->win[DIR_Attr] = AM_DIR;
5054 st_dword(fs->win + DIR_ModTime, tm);
5055 st_clust(fs, fs->win, dcl);
5056 mem_cpy(fs->win + SZDIRE, fs->win, SZDIRE); /* Create ".." entry */
5057 fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
5058 st_clust(fs, fs->win + SZDIRE, pcl);
5059 fs->wflag = 1;
5060 }
5061 res = dir_register(&dj); /* Register the object to the parent directoy */
5062 }
5063 }
5064 if (res == FR_OK) {
5065 #if FF_FS_EXFAT
5066 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
5067 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
5068 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
5069 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs)); /* Directory size needs to be valid */
5070 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs));
5071 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */
5072 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
5073 res = store_xdir(&dj);
5074 } else
5075 #endif
5076 {
5077 st_dword(dj.dir + DIR_ModTime, tm); /* Created time */
5078 st_clust(fs, dj.dir, dcl); /* Table start cluster */
5079 dj.dir[DIR_Attr] = AM_DIR; /* Attribute */
5080 fs->wflag = 1;
5081 }
5082 if (res == FR_OK) {
5083 res = sync_fs(fs);
5084 }
5085 } else {
5086 remove_chain(&sobj, dcl, 0); /* Could not register, remove the allocated cluster */
5087 }
5088 }
5089 FREE_NAMBUF();
5090 }
5091
5092 LEAVE_FF(fs, res);
5093 }
5094
5095
5096
5097
5098 /*-----------------------------------------------------------------------*/
5099 /* Rename a File/Directory */
5100 /*-----------------------------------------------------------------------*/
5101
5102 FRESULT f_rename (
5103 const TCHAR* path_old, /* Pointer to the object name to be renamed */
5104 const TCHAR* path_new /* Pointer to the new name */
5105 )
5106 {
5107 FRESULT res;
5108 DIR djo, djn;
5109 FATFS *fs;
5110 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;
5111 LBA_t sect;
5112 DEF_NAMBUF
5113
5114
5115 get_ldnumber(&path_new); /* Snip the drive number of new name off */
5116 res = mount_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
5117 if (res == FR_OK) {
5118 djo.obj.fs = fs;
5119 INIT_NAMBUF(fs);
5120 res = follow_path(&djo, path_old); /* Check old object */
5121 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
5122 #if FF_FS_LOCK != 0
5123 if (res == FR_OK) {
5124 res = chk_lock(&djo, 2);
5125 }
5126 #endif
5127 if (res == FR_OK) { /* Object to be renamed is found */
5128 #if FF_FS_EXFAT
5129 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */
5130 BYTE nf, nn;
5131 WORD nh;
5132
5133 mem_cpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
5134 mem_cpy(&djn, &djo, sizeof djo);
5135 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5136 if (res == FR_OK) { /* Is new name already in use by any other object? */
5137 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5138 }
5139 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5140 res = dir_register(&djn); /* Register the new entry */
5141 if (res == FR_OK) {
5142 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
5143 nh = ld_word(fs->dirbuf + XDIR_NameHash);
5144 mem_cpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */
5145 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
5146 st_word(fs->dirbuf + XDIR_NameHash, nh);
5147 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5148 /* Start of critical section where an interruption can cause a cross-link */
5149 res = store_xdir(&djn);
5150 }
5151 }
5152 } else
5153 #endif
5154 { /* At FAT/FAT32 volume */
5155 mem_cpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */
5156 mem_cpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
5157 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5158 if (res == FR_OK) { /* Is new name already in use by any other object? */
5159 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5160 }
5161 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5162 res = dir_register(&djn); /* Register the new entry */
5163 if (res == FR_OK) {
5164 dir = djn.dir; /* Copy directory entry of the object except name */
5165 mem_cpy(dir + 13, buf + 13, SZDIRE - 13);
5166 dir[DIR_Attr] = buf[DIR_Attr];
5167 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5168 fs->wflag = 1;
5169 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
5170 sect = clst2sect(fs, ld_clust(fs, dir));
5171 if (sect == 0) {
5172 res = FR_INT_ERR;
5173 } else {
5174 /* Start of critical section where an interruption can cause a cross-link */
5175 res = move_window(fs, sect);
5176 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */
5177 if (res == FR_OK && dir[1] == '.') {
5178 st_clust(fs, dir, djn.obj.sclust);
5179 fs->wflag = 1;
5180 }
5181 }
5182 }
5183 }
5184 }
5185 }
5186 if (res == FR_OK) {
5187 res = dir_remove(&djo); /* Remove old entry */
5188 if (res == FR_OK) {
5189 res = sync_fs(fs);
5190 }
5191 }
5192 /* End of the critical section */
5193 }
5194 FREE_NAMBUF();
5195 }
5196
5197 LEAVE_FF(fs, res);
5198 }
5199
5200 #endif /* !FF_FS_READONLY */
5201 #endif /* FF_FS_MINIMIZE == 0 */
5202 #endif /* FF_FS_MINIMIZE <= 1 */
5203 #endif /* FF_FS_MINIMIZE <= 2 */
5204
5205
5206
5207 #if FF_USE_CHMOD && !FF_FS_READONLY
5208 /*-----------------------------------------------------------------------*/
5209 /* Change Attribute */
5210 /*-----------------------------------------------------------------------*/
5211
5212 FRESULT f_chmod (
5213 const TCHAR* path, /* Pointer to the file path */
5214 BYTE attr, /* Attribute bits */
5215 BYTE mask /* Attribute mask to change */
5216 )
5217 {
5218 FRESULT res;
5219 DIR dj;
5220 FATFS *fs;
5221 DEF_NAMBUF
5222
5223
5224 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5225 if (res == FR_OK) {
5226 dj.obj.fs = fs;
5227 INIT_NAMBUF(fs);
5228 res = follow_path(&dj, path); /* Follow the file path */
5229 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5230 if (res == FR_OK) {
5231 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
5232 #if FF_FS_EXFAT
5233 if (fs->fs_type == FS_EXFAT) {
5234 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5235 res = store_xdir(&dj);
5236 } else
5237 #endif
5238 {
5239 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5240 fs->wflag = 1;
5241 }
5242 if (res == FR_OK) {
5243 res = sync_fs(fs);
5244 }
5245 }
5246 FREE_NAMBUF();
5247 }
5248
5249 LEAVE_FF(fs, res);
5250 }
5251
5252
5253
5254
5255 /*-----------------------------------------------------------------------*/
5256 /* Change Timestamp */
5257 /*-----------------------------------------------------------------------*/
5258
5259 FRESULT f_utime (
5260 const TCHAR* path, /* Pointer to the file/directory name */
5261 const FILINFO* fno /* Pointer to the timestamp to be set */
5262 )
5263 {
5264 FRESULT res;
5265 DIR dj;
5266 FATFS *fs;
5267 DEF_NAMBUF
5268
5269
5270 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5271 if (res == FR_OK) {
5272 dj.obj.fs = fs;
5273 INIT_NAMBUF(fs);
5274 res = follow_path(&dj, path); /* Follow the file path */
5275 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5276 if (res == FR_OK) {
5277 #if FF_FS_EXFAT
5278 if (fs->fs_type == FS_EXFAT) {
5279 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5280 res = store_xdir(&dj);
5281 } else
5282 #endif
5283 {
5284 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5285 fs->wflag = 1;
5286 }
5287 if (res == FR_OK) {
5288 res = sync_fs(fs);
5289 }
5290 }
5291 FREE_NAMBUF();
5292 }
5293
5294 LEAVE_FF(fs, res);
5295 }
5296
5297 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */
5298
5299
5300
5301 #if FF_USE_LABEL
5302 /*-----------------------------------------------------------------------*/
5303 /* Get Volume Label */
5304 /*-----------------------------------------------------------------------*/
5305
5306 FRESULT f_getlabel (
5307 const TCHAR* path, /* Logical drive number */
5308 TCHAR* label, /* Buffer to store the volume label */
5309 DWORD* vsn /* Variable to store the volume serial number */
5310 )
5311 {
5312 FRESULT res;
5313 DIR dj;
5314 FATFS *fs;
5315 UINT si, di;
5316 WCHAR wc;
5317
5318 /* Get logical drive */
5319 res = mount_volume(&path, &fs, 0);
5320
5321 /* Get volume label */
5322 if (res == FR_OK && label) {
5323 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5324 res = dir_sdi(&dj, 0);
5325 if (res == FR_OK) {
5326 res = DIR_READ_LABEL(&dj); /* Find a volume label entry */
5327 if (res == FR_OK) {
5328 #if FF_FS_EXFAT
5329 if (fs->fs_type == FS_EXFAT) {
5330 WCHAR hs;
5331
5332 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
5333 wc = ld_word(dj.dir + XDIR_Label + si * 2);
5334 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */
5335 hs = wc; continue;
5336 }
5337 wc = put_utf((DWORD)hs << 16 | wc, &label[di], 4);
5338 if (wc == 0) { di = 0; break; }
5339 di += wc;
5340 hs = 0;
5341 }
5342 if (hs != 0) di = 0; /* Broken surrogate pair? */
5343 label[di] = 0;
5344 } else
5345 #endif
5346 {
5347 si = di = 0; /* Extract volume label from AM_VOL entry */
5348 while (si < 11) {
5349 wc = dj.dir[si++];
5350 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */
5351 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */
5352 wc = ff_oem2uni(wc, CODEPAGE); /* Convert it into Unicode */
5353 if (wc != 0) wc = put_utf(wc, &label[di], 4); /* Put it in Unicode */
5354 if (wc == 0) { di = 0; break; }
5355 di += wc;
5356 #else /* ANSI/OEM output */
5357 label[di++] = (TCHAR)wc;
5358 #endif
5359 }
5360 do { /* Truncate trailing spaces */
5361 label[di] = 0;
5362 if (di == 0) break;
5363 } while (label[--di] == ' ');
5364 }
5365 }
5366 }
5367 if (res == FR_NO_FILE) { /* No label entry and return nul string */
5368 label[0] = 0;
5369 res = FR_OK;
5370 }
5371 }
5372
5373 /* Get volume serial number */
5374 if (res == FR_OK && vsn) {
5375 res = move_window(fs, fs->volbase);
5376 if (res == FR_OK) {
5377 switch (fs->fs_type) {
5378 case FS_EXFAT:
5379 di = BPB_VolIDEx; break;
5380
5381 case FS_FAT32:
5382 di = BS_VolID32; break;
5383
5384 default:
5385 di = BS_VolID;
5386 }
5387 *vsn = ld_dword(fs->win + di);
5388 }
5389 }
5390
5391 LEAVE_FF(fs, res);
5392 }
5393
5394
5395
5396 #if !FF_FS_READONLY
5397 /*-----------------------------------------------------------------------*/
5398 /* Set Volume Label */
5399 /*-----------------------------------------------------------------------*/
5400
5401 FRESULT f_setlabel (
5402 const TCHAR* label /* Volume label to set with heading logical drive number */
5403 )
5404 {
5405 FRESULT res;
5406 DIR dj;
5407 FATFS *fs;
5408 BYTE dirvn[22];
5409 UINT di;
5410 WCHAR wc;
5411 static const char badchr[] = "+.,;=[]/\\\"*:<>\?|\x7F"; /* [0..] for FAT, [7..] for exFAT */
5412 #if FF_USE_LFN
5413 DWORD dc;
5414 #endif
5415
5416 /* Get logical drive */
5417 res = mount_volume(&label, &fs, FA_WRITE);
5418 if (res != FR_OK) LEAVE_FF(fs, res);
5419
5420 #if FF_FS_EXFAT
5421 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
5422 mem_set(dirvn, 0, 22);
5423 di = 0;
5424 while ((UINT)*label >= ' ') { /* Create volume label */
5425 dc = tchar2uni(&label); /* Get a Unicode character */
5426 if (dc >= 0x10000) {
5427 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */
5428 dc = 0;
5429 } else {
5430 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++;
5431 }
5432 }
5433 if (dc == 0 || chk_chr(badchr + 7, (int)dc) || di >= 11) { /* Check validity of the volume label */
5434 LEAVE_FF(fs, FR_INVALID_NAME);
5435 }
5436 st_word(dirvn + di * 2, (WCHAR)dc); di++;
5437 }
5438 } else
5439 #endif
5440 { /* On the FAT/FAT32 volume */
5441 mem_set(dirvn, ' ', 11);
5442 di = 0;
5443 while ((UINT)*label >= ' ') { /* Create volume label */
5444 #if FF_USE_LFN
5445 dc = tchar2uni(&label);
5446 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0;
5447 #else /* ANSI/OEM input */
5448 wc = (BYTE)*label++;
5449 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0;
5450 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */
5451 #if FF_CODE_PAGE == 0
5452 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5453 #elif FF_CODE_PAGE < 900
5454 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5455 #endif
5456 #endif
5457 if (wc == 0 || chk_chr(badchr + 0, (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
5458 LEAVE_FF(fs, FR_INVALID_NAME);
5459 }
5460 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8);
5461 dirvn[di++] = (BYTE)wc;
5462 }
5463 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
5464 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */
5465 }
5466
5467 /* Set volume label */
5468 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5469 res = dir_sdi(&dj, 0);
5470 if (res == FR_OK) {
5471 res = DIR_READ_LABEL(&dj); /* Get volume label entry */
5472 if (res == FR_OK) {
5473 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5474 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */
5475 mem_cpy(dj.dir + XDIR_Label, dirvn, 22);
5476 } else {
5477 if (di != 0) {
5478 mem_cpy(dj.dir, dirvn, 11); /* Change the volume label */
5479 } else {
5480 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
5481 }
5482 }
5483 fs->wflag = 1;
5484 res = sync_fs(fs);
5485 } else { /* No volume label entry or an error */
5486 if (res == FR_NO_FILE) {
5487 res = FR_OK;
5488 if (di != 0) { /* Create a volume label entry */
5489 res = dir_alloc(&dj, 1); /* Allocate an entry */
5490 if (res == FR_OK) {
5491 mem_set(dj.dir, 0, SZDIRE); /* Clean the entry */
5492 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5493 dj.dir[XDIR_Type] = ET_VLABEL; /* Create volume label entry */
5494 dj.dir[XDIR_NumLabel] = (BYTE)di;
5495 mem_cpy(dj.dir + XDIR_Label, dirvn, 22);
5496 } else {
5497 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
5498 mem_cpy(dj.dir, dirvn, 11);
5499 }
5500 fs->wflag = 1;
5501 res = sync_fs(fs);
5502 }
5503 }
5504 }
5505 }
5506 }
5507
5508 LEAVE_FF(fs, res);
5509 }
5510
5511 #endif /* !FF_FS_READONLY */
5512 #endif /* FF_USE_LABEL */
5513
5514
5515
5516 #if FF_USE_EXPAND && !FF_FS_READONLY
5517 /*-----------------------------------------------------------------------*/
5518 /* Allocate a Contiguous Blocks to the File */
5519 /*-----------------------------------------------------------------------*/
5520
5521 FRESULT f_expand (
5522 FIL* fp, /* Pointer to the file object */
5523 FSIZE_t fsz, /* File size to be expanded to */
5524 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
5525 )
5526 {
5527 FRESULT res;
5528 FATFS *fs;
5529 DWORD n, clst, stcl, scl, ncl, tcl, lclst;
5530
5531
5532 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5533 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5534 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
5535 #if FF_FS_EXFAT
5536 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
5537 #endif
5538 n = (DWORD)fs->csize * SS(fs); /* Cluster size */
5539 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
5540 stcl = fs->last_clst; lclst = 0;
5541 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
5542
5543 #if FF_FS_EXFAT
5544 if (fs->fs_type == FS_EXFAT) {
5545 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
5546 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
5547 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
5548 if (res == FR_OK) { /* A contiguous free area is found */
5549 if (opt) { /* Allocate it now */
5550 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
5551 lclst = scl + tcl - 1;
5552 } else { /* Set it as suggested point for next allocation */
5553 lclst = scl - 1;
5554 }
5555 }
5556 } else
5557 #endif
5558 {
5559 scl = clst = stcl; ncl = 0;
5560 for (;;) { /* Find a contiguous cluster block */
5561 n = get_fat(&fp->obj, clst);
5562 if (++clst >= fs->n_fatent) clst = 2;
5563 if (n == 1) { res = FR_INT_ERR; break; }
5564 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
5565 if (n == 0) { /* Is it a free cluster? */
5566 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
5567 } else {
5568 scl = clst; ncl = 0; /* Not a free cluster */
5569 }
5570 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */
5571 }
5572 if (res == FR_OK) { /* A contiguous free area is found */
5573 if (opt) { /* Allocate it now */
5574 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
5575 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
5576 if (res != FR_OK) break;
5577 lclst = clst;
5578 }
5579 } else { /* Set it as suggested point for next allocation */
5580 lclst = scl - 1;
5581 }
5582 }
5583 }
5584
5585 if (res == FR_OK) {
5586 fs->last_clst = lclst; /* Set suggested start cluster to start next */
5587 if (opt) { /* Is it allocated now? */
5588 fp->obj.sclust = scl; /* Update object allocation information */
5589 fp->obj.objsize = fsz;
5590 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
5591 fp->flag |= FA_MODIFIED;
5592 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */
5593 fs->free_clst -= tcl;
5594 fs->fsi_flag |= 1;
5595 }
5596 }
5597 }
5598
5599 LEAVE_FF(fs, res);
5600 }
5601
5602 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */
5603
5604
5605
5606 #if FF_USE_FORWARD
5607 /*-----------------------------------------------------------------------*/
5608 /* Forward Data to the Stream Directly */
5609 /*-----------------------------------------------------------------------*/
5610
5611 FRESULT f_forward (
5612 FIL* fp, /* Pointer to the file object */
5613 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
5614 UINT btf, /* Number of bytes to forward */
5615 UINT* bf /* Pointer to number of bytes forwarded */
5616 )
5617 {
5618 FRESULT res;
5619 FATFS *fs;
5620 DWORD clst;
5621 LBA_t sect;
5622 FSIZE_t remain;
5623 UINT rcnt, csect;
5624 BYTE *dbuf;
5625
5626
5627 *bf = 0; /* Clear transfer byte counter */
5628 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5629 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5630 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
5631
5632 remain = fp->obj.objsize - fp->fptr;
5633 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
5634
5635 for ( ; btf && (*func)(0, 0); /* Repeat until all data transferred or stream goes busy */
5636 fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
5637 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
5638 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
5639 if (csect == 0) { /* On the cluster boundary? */
5640 clst = (fp->fptr == 0) ? /* On the top of the file? */
5641 fp->obj.sclust : get_fat(&fp->obj, fp->clust);
5642 if (clst <= 1) ABORT(fs, FR_INT_ERR);
5643 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
5644 fp->clust = clst; /* Update current cluster */
5645 }
5646 }
5647 sect = clst2sect(fs, fp->clust); /* Get current data sector */
5648 if (sect == 0) ABORT(fs, FR_INT_ERR);
5649 sect += csect;
5650 #if FF_FS_TINY
5651 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
5652 dbuf = fs->win;
5653 #else
5654 if (fp->sect != sect) { /* Fill sector cache with file data */
5655 #if !FF_FS_READONLY
5656 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
5657 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5658 fp->flag &= (BYTE)~FA_DIRTY;
5659 }
5660 #endif
5661 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5662 }
5663 dbuf = fp->buf;
5664 #endif
5665 fp->sect = sect;
5666 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
5667 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
5668 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
5669 if (rcnt == 0) ABORT(fs, FR_INT_ERR);
5670 }
5671
5672 LEAVE_FF(fs, FR_OK);
5673 }
5674 #endif /* FF_USE_FORWARD */
5675
5676
5677
5678 #if !FF_FS_READONLY && FF_USE_MKFS
5679 /*-----------------------------------------------------------------------*/
5680 /* Create an FAT/exFAT volume */
5681 /*-----------------------------------------------------------------------*/
5682
5683 #define N_SEC_TRACK 63 /* Sectors per track for determination of drive CHS */
5684 #define GPT_ALIGN 0x100000 /* Alignment of partitions in GPT [byte] (>=128KB) */
5685 #define GPT_ITEMS 128 /* Number of GPT table size (>=128, sector aligned) */
5686
5687
5688 /* Create partitions on the physical drive */
5689
5690 static FRESULT create_partition (
5691 BYTE drv, /* Physical drive number */
5692 const LBA_t plst[], /* Partition list */
5693 UINT sys, /* System ID (for only MBR, temp setting) and bit8:GPT */
5694 BYTE* buf /* Working buffer for a sector */
5695 )
5696 {
5697 UINT i, cy;
5698 LBA_t sz_drv;
5699 DWORD sz_drv32, s_lba32, n_lba32;
5700 BYTE *pte, hd, n_hd, sc, n_sc;
5701
5702 /* Get drive size */
5703 if (disk_ioctl(drv, GET_SECTOR_COUNT, &sz_drv) != RES_OK) return FR_DISK_ERR;
5704
5705 #if FF_LBA64
5706 if (sz_drv >= FF_MIN_GPT) { /* Create partitions in GPT */
5707 WORD ss;
5708 UINT sz_pt, pi, si, ofs;
5709 DWORD bcc, rnd, align;
5710 QWORD s_lba64, n_lba64, sz_pool, s_bpt;
5711 static const BYTE gpt_mbr[16] = {0x00, 0x00, 0x02, 0x00, 0xEE, 0xFE, 0xFF, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF};
5712
5713 #if FF_MAX_SS != FF_MIN_SS
5714 if (disk_ioctl(drv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; /* Get sector size */
5715 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5716 #else
5717 ss = FF_MAX_SS;
5718 #endif
5719 rnd = GET_FATTIME(); /* Random seed */
5720 align = GPT_ALIGN / ss; /* Partition alignment [sector] */
5721 sz_pt = GPT_ITEMS * SZ_GPTE / ss; /* Size of PT [sector] */
5722 s_bpt = sz_drv - sz_pt - 1; /* Backup PT start sector */
5723 s_lba64 = 2 + sz_pt; /* First allocatable sector */
5724 sz_pool = s_bpt - s_lba64; /* Size of allocatable area */
5725 bcc = 0xFFFFFFFF; n_lba64 = 1;
5726 pi = si = 0; /* partition table index, size table index */
5727 do {
5728 if (pi * SZ_GPTE % ss == 0) mem_set(buf, 0, ss); /* Clean the buffer if needed */
5729 if (n_lba64 != 0) { /* Is the size table not termintated? */
5730 s_lba64 = (s_lba64 + align - 1) & ((QWORD)0 - align); /* Align partition start */
5731 n_lba64 = plst[si++]; /* Get a partition size */
5732 if (n_lba64 <= 100) { /* Is the size in percentage? */
5733 n_lba64 = sz_pool * n_lba64 / 100;
5734 n_lba64 = (n_lba64 + align - 1) & ((QWORD)0 - align); /* Align partition end (only if in percentage) */
5735 }
5736 if (s_lba64 + n_lba64 > s_bpt) { /* Clip at end of the pool */
5737 n_lba64 = (s_lba64 < s_bpt) ? s_bpt - s_lba64 : 0;
5738 }
5739 }
5740 if (n_lba64 != 0) { /* Add a partition? */
5741 ofs = pi * SZ_GPTE % ss;
5742 mem_cpy(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16); /* Partition GUID (Microsoft Basic Data) */
5743 rnd = make_rand(rnd, buf + ofs + GPTE_UpGuid, 16); /* Unique partition GUID */
5744 st_qword(buf + ofs + GPTE_FstLba, s_lba64); /* Partition start LBA */
5745 st_qword(buf + ofs + GPTE_LstLba, s_lba64 + n_lba64 - 1); /* Partition end LBA */
5746 s_lba64 += n_lba64; /* Next partition LBA */
5747 }
5748 if ((pi + 1) * SZ_GPTE % ss == 0) { /* Write the buffer if it is filled up */
5749 for (i = 0; i < ss; bcc = crc32(bcc, buf[i++])) ; /* Calculate table check sum */
5750 if (disk_write(drv, buf, 2 + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Primary table */
5751 if (disk_write(drv, buf, s_bpt + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Secondary table */
5752 }
5753 } while (++pi < GPT_ITEMS);
5754
5755 /* Create primary GPT header */
5756 mem_set(buf, 0, ss);
5757 mem_cpy(buf + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16); /* Signature, version (1.0) and size (92) */
5758 st_dword(buf + GPTH_PtBcc, ~bcc); /* Table check sum */
5759 st_qword(buf + GPTH_CurLba, 1); /* LBA of this header */
5760 st_qword(buf + GPTH_BakLba, sz_drv - 1); /* LBA of another header */
5761 st_qword(buf + GPTH_FstLba, 2 + sz_pt); /* LBA of first allocatable sector */
5762 st_qword(buf + GPTH_LstLba, s_bpt - 1); /* LBA of last allocatable sector */
5763 st_dword(buf + GPTH_PteSize, SZ_GPTE); /* Size of a table entry */
5764 st_dword(buf + GPTH_PtNum, GPT_ITEMS); /* Number of table entries */
5765 st_dword(buf + GPTH_PtOfs, 2); /* LBA of this table */
5766 rnd = make_rand(rnd, buf + GPTH_DskGuid, 16); /* Disk GUID */
5767 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5768 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5769 if (disk_write(drv, buf, 1, 1) != RES_OK) return FR_DISK_ERR;
5770
5771 /* Create secondary GPT header */
5772 st_qword(buf + GPTH_CurLba, sz_drv - 1); /* LBA of this header */
5773 st_qword(buf + GPTH_BakLba, 1); /* LBA of another header */
5774 st_qword(buf + GPTH_PtOfs, s_bpt); /* LBA of this table */
5775 st_dword(buf + GPTH_Bcc, 0);
5776 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5777 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5778 if (disk_write(drv, buf, sz_drv - 1, 1) != RES_OK) return FR_DISK_ERR;
5779
5780 /* Create protective MBR */
5781 mem_set(buf, 0, ss);
5782 mem_cpy(buf + MBR_Table, gpt_mbr, 16); /* Create a GPT partition */
5783 st_word(buf + BS_55AA, 0xAA55);
5784 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;
5785
5786 } else
5787 #endif
5788 { /* Create partitions in MBR */
5789 sz_drv32 = (DWORD)sz_drv;
5790 n_sc = N_SEC_TRACK; /* Determine drive CHS without any consideration of the drive geometry */
5791 for (n_hd = 8; n_hd != 0 && sz_drv32 / n_hd / n_sc > 1024; n_hd *= 2) ;
5792 if (n_hd == 0) n_hd = 255; /* Number of heads needs to be <256 */
5793
5794 mem_set(buf, 0, FF_MAX_SS); /* Clear MBR */
5795 pte = buf + MBR_Table; /* Partition table in the MBR */
5796 for (i = 0, s_lba32 = 2048; i < 4 && s_lba32 != 0 && s_lba32 < sz_drv32; i++, s_lba32 += n_lba32) {
5797 n_lba32 = (DWORD)plst[i]; /* Get partition size */
5798 if (n_lba32 <= 100) n_lba32 = (n_lba32 == 100) ? sz_drv32 : sz_drv32 / 100 * n_lba32; /* Size in percentage? */
5799 if (s_lba32 + n_lba32 > sz_drv32 || s_lba32 + n_lba32 < s_lba32) n_lba32 = sz_drv32 - s_lba32; /* Clip at drive size */
5800 if (n_lba32 == 0) break; /* End of table or no sector to allocate? */
5801
5802 st_dword(pte + PTE_StLba, s_lba32); /* Start LBA */
5803 st_dword(pte + PTE_SizLba, n_lba32); /* Number of sectors */
5804 pte[PTE_System] = (BYTE)sys; /* System type */
5805
5806 cy = (UINT)(s_lba32 / n_sc / n_hd); /* Start cylinder */
5807 hd = (BYTE)(s_lba32 / n_sc % n_hd); /* Start head */
5808 sc = (BYTE)(s_lba32 % n_sc + 1); /* Start sector */
5809 pte[PTE_StHead] = hd;
5810 pte[PTE_StSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5811 pte[PTE_StCyl] = (BYTE)cy;
5812
5813 cy = (UINT)((s_lba32 + n_lba32 - 1) / n_sc / n_hd); /* End cylinder */
5814 hd = (BYTE)((s_lba32 + n_lba32 - 1) / n_sc % n_hd); /* End head */
5815 sc = (BYTE)((s_lba32 + n_lba32 - 1) % n_sc + 1); /* End sector */
5816 pte[PTE_EdHead] = hd;
5817 pte[PTE_EdSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5818 pte[PTE_EdCyl] = (BYTE)cy;
5819
5820 pte += SZ_PTE; /* Next entry */
5821 }
5822
5823 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
5824 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */
5825 }
5826
5827 return FR_OK;
5828 }
5829
5830
5831
5832 FRESULT f_mkfs (
5833 const TCHAR* path, /* Logical drive number */
5834 const MKFS_PARM* opt, /* Format options */
5835 void* work, /* Pointer to working buffer (null: use heap memory) */
5836 UINT len /* Size of working buffer [byte] */
5837 )
5838 {
5839 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */
5840 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */
5841 static const MKFS_PARM defopt = {FM_ANY, 0, 0, 0, 0}; /* Default parameter */
5842 BYTE fsopt, fsty, sys, *buf, *pte, pdrv, ipart;
5843 WORD ss; /* Sector size */
5844 DWORD sz_buf, sz_blk, n_clst, pau, nsect, n;
5845 LBA_t sz_vol, b_vol, b_fat, b_data; /* Size of volume, Base LBA of volume, fat, data */
5846 LBA_t sect, lba[2];
5847 DWORD sz_rsv, sz_fat, sz_dir, sz_au; /* Size of reserved, fat, dir, data, cluster */
5848 UINT n_fat, n_root, i; /* Index, Number of FATs and Number of roor dir entries */
5849 int vol;
5850 DSTATUS ds;
5851 FRESULT fr;
5852
5853
5854 /* Check mounted drive and clear work area */
5855 vol = get_ldnumber(&path); /* Get target logical drive */
5856 if (vol < 0) return FR_INVALID_DRIVE;
5857 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the fs object if mounted */
5858 pdrv = LD2PD(vol); /* Physical drive */
5859 ipart = LD2PT(vol); /* Partition (0:create as new, 1..:get from partition table) */
5860 if (!opt) opt = &defopt; /* Use default parameter if it is not given */
5861
5862 /* Get physical drive status (sz_drv, sz_blk, ss) */
5863 ds = disk_initialize(pdrv);
5864 if (ds & STA_NOINIT) return FR_NOT_READY;
5865 if (ds & STA_PROTECT) return FR_WRITE_PROTECTED;
5866 sz_blk = opt->align;
5867 if (sz_blk == 0 && disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK) sz_blk = 1;
5868 if (sz_blk == 0 || sz_blk > 0x8000 || (sz_blk & (sz_blk - 1))) sz_blk = 1;
5869 #if FF_MAX_SS != FF_MIN_SS
5870 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
5871 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5872 #else
5873 ss = FF_MAX_SS;
5874 #endif
5875 /* Options for FAT sub-type and FAT parameters */
5876 fsopt = opt->fmt & (FM_ANY | FM_SFD);
5877 n_fat = (opt->n_fat >= 1 && opt->n_fat <= 2) ? opt->n_fat : 1;
5878 n_root = (opt->n_root >= 1 && opt->n_root <= 32768 && (opt->n_root % (ss / SZDIRE)) == 0) ? opt->n_root : 512;
5879 sz_au = (opt->au_size <= 0x1000000 && (opt->au_size & (opt->au_size - 1)) == 0) ? opt->au_size : 0;
5880 sz_au /= ss; /* Byte --> Sector */
5881
5882 /* Get working buffer */
5883 sz_buf = len / ss; /* Size of working buffer [sector] */
5884 if (sz_buf == 0) return FR_NOT_ENOUGH_CORE;
5885 buf = (BYTE*)work; /* Working buffer */
5886 #if FF_USE_LFN == 3
5887 if (!buf) buf = ff_memalloc(sz_buf * ss); /* Use heap memory for working buffer */
5888 #endif
5889 if (!buf) return FR_NOT_ENOUGH_CORE;
5890
5891 /* Determine where the volume to be located (b_vol, sz_vol) */
5892 b_vol = sz_vol = 0;
5893 if (FF_MULTI_PARTITION && ipart != 0) { /* Is the volume associated with any specific partition? */
5894 /* Get partition location from the existing partition table */
5895 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */
5896 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */
5897 #if FF_LBA64
5898 if (buf[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
5899 DWORD n_ent, ofs;
5900 QWORD pt_lba;
5901
5902 /* Get the partition location from GPT */
5903 if (disk_read(pdrv, buf, 1, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load GPT header sector (next to MBR) */
5904 if (!test_gpt_header(buf)) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if GPT header is valid */
5905 n_ent = ld_dword(buf + GPTH_PtNum); /* Number of entries */
5906 pt_lba = ld_qword(buf + GPTH_PtOfs); /* Table start sector */
5907 ofs = i = 0;
5908 while (n_ent) { /* Find MS Basic partition with order of ipart */
5909 if (ofs == 0 && disk_read(pdrv, buf, pt_lba++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Get PT sector */
5910 if (!mem_cmp(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16) && ++i == ipart) { /* MS basic data partition? */
5911 b_vol = ld_qword(buf + ofs + GPTE_FstLba);
5912 sz_vol = ld_qword(buf + ofs + GPTE_LstLba) - b_vol + 1;
5913 break;
5914 }
5915 n_ent--; ofs = (ofs + SZ_GPTE) % ss; /* Next entry */
5916 }
5917 if (n_ent == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* Partition not found */
5918 fsopt |= 0x80; /* Partitioning is in GPT */
5919 } else
5920 #endif
5921 { /* Get the partition location from MBR partition table */
5922 pte = buf + (MBR_Table + (ipart - 1) * SZ_PTE);
5923 if (ipart > 4 || pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */
5924 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
5925 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
5926 }
5927 } else { /* The volume is associated with a physical drive */
5928 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5929 if (!(fsopt & FM_SFD)) { /* To be partitioned? */
5930 /* Create a single-partition on the drive in this function */
5931 #if FF_LBA64
5932 if (sz_vol >= FF_MIN_GPT) { /* Which partition type to create, MBR or GPT? */
5933 fsopt |= 0x80; /* Partitioning is in GPT */
5934 b_vol = GPT_ALIGN / ss; sz_vol -= b_vol + GPT_ITEMS * SZ_GPTE / ss + 1; /* Estimated partition offset and size */
5935 } else
5936 #endif
5937 { /* Partitioning is in MBR */
5938 if (sz_vol > N_SEC_TRACK) {
5939 b_vol = 2048; sz_vol -= b_vol; /* Estimated partition offset and size */
5940 }
5941 }
5942 }
5943 }
5944 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */
5945
5946 /* Now start to create a FAT volume at b_vol and sz_vol */
5947
5948 do { /* Pre-determine the FAT type */
5949 if (FF_FS_EXFAT && (fsopt & FM_EXFAT)) { /* exFAT possible? */
5950 if ((fsopt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || sz_au > 128) { /* exFAT only, vol >= 64MS or sz_au > 128S ? */
5951 fsty = FS_EXFAT; break;
5952 }
5953 }
5954 #if FF_LBA64
5955 if (sz_vol >= 0x100000000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too large volume for FAT/FAT32 */
5956 #endif
5957 if (sz_au > 128) sz_au = 128; /* Invalid AU for FAT/FAT32? */
5958 if (fsopt & FM_FAT32) { /* FAT32 possible? */
5959 if (!(fsopt & FM_FAT)) { /* no-FAT? */
5960 fsty = FS_FAT32; break;
5961 }
5962 }
5963 if (!(fsopt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */
5964 fsty = FS_FAT16;
5965 } while (0);
5966
5967 #if FF_FS_EXFAT
5968 if (fsty == FS_EXFAT) { /* Create an exFAT volume */
5969 DWORD szb_bit, szb_case, sum, nb, cl, tbl[3];
5970 WCHAR ch, si;
5971 UINT j, st;
5972 BYTE b;
5973
5974 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume for exFAT? */
5975 #if FF_USE_TRIM
5976 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
5977 disk_ioctl(pdrv, CTRL_TRIM, lba);
5978 #endif
5979 /* Determine FAT location, data location and number of clusters */
5980 if (sz_au == 0) { /* AU auto-selection */
5981 sz_au = 8;
5982 if (sz_vol >= 0x80000) sz_au = 64; /* >= 512Ks */
5983 if (sz_vol >= 0x4000000) sz_au = 256; /* >= 64Ms */
5984 }
5985 b_fat = b_vol + 32; /* FAT start at offset 32 */
5986 sz_fat = (DWORD)((sz_vol / sz_au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
5987 b_data = (b_fat + sz_fat + sz_blk - 1) & ~((LBA_t)sz_blk - 1); /* Align data area to the erase block boundary */
5988 if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
5989 n_clst = (DWORD)(sz_vol - (b_data - b_vol)) / sz_au; /* Number of clusters */
5990 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */
5991 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */
5992
5993 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
5994 tbl[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss); /* Number of allocation bitmap clusters */
5995
5996 /* Create a compressed up-case table */
5997 sect = b_data + sz_au * tbl[0]; /* Table start sector */
5998 sum = 0; /* Table checksum to be stored in the 82 entry */
5999 st = 0; si = 0; i = 0; j = 0; szb_case = 0;
6000 do {
6001 switch (st) {
6002 case 0:
6003 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */
6004 if (ch != si) {
6005 si++; break; /* Store the up-case char if exist */
6006 }
6007 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
6008 if (j >= 128) {
6009 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 */
6010 }
6011 st = 1; /* Do not compress short run */
6012 /* go to next case */
6013 case 1:
6014 ch = si++; /* Fill the short run */
6015 if (--j == 0) st = 0;
6016 break;
6017
6018 default:
6019 ch = (WCHAR)j; si += (WCHAR)j; /* Number of chars to skip */
6020 st = 0;
6021 }
6022 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
6023 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
6024 i += 2; szb_case += 2;
6025 if (si == 0 || i == sz_buf * ss) { /* Write buffered data when buffer full or end of process */
6026 n = (i + ss - 1) / ss;
6027 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6028 sect += n; i = 0;
6029 }
6030 } while (si);
6031 tbl[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss); /* Number of up-case table clusters */
6032 tbl[2] = 1; /* Number of root dir clusters */
6033
6034 /* Initialize the allocation bitmap */
6035 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of sectors */
6036 nb = tbl[0] + tbl[1] + tbl[2]; /* Number of clusters in-use by system */
6037 do {
6038 mem_set(buf, 0, sz_buf * ss);
6039 for (i = 0; nb >= 8 && i < sz_buf * ss; buf[i++] = 0xFF, nb -= 8) ;
6040 for (b = 1; nb != 0 && i < sz_buf * ss; buf[i] |= b, b <<= 1, nb--) ;
6041 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6042 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6043 sect += n; nsect -= n;
6044 } while (nsect);
6045
6046 /* Initialize the FAT */
6047 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
6048 j = nb = cl = 0;
6049 do {
6050 mem_set(buf, 0, sz_buf * ss); i = 0; /* Clear work area and reset write index */
6051 if (cl == 0) { /* Set FAT [0] and FAT[1] */
6052 st_dword(buf + i, 0xFFFFFFF8); i += 4; cl++;
6053 st_dword(buf + i, 0xFFFFFFFF); i += 4; cl++;
6054 }
6055 do { /* Create chains of bitmap, up-case and root dir */
6056 while (nb != 0 && i < sz_buf * ss) { /* Create a chain */
6057 st_dword(buf + i, (nb > 1) ? cl + 1 : 0xFFFFFFFF);
6058 i += 4; cl++; nb--;
6059 }
6060 if (nb == 0 && j < 3) nb = tbl[j++]; /* Next chain */
6061 } while (nb != 0 && i < sz_buf * ss);
6062 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6063 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6064 sect += n; nsect -= n;
6065 } while (nsect);
6066
6067 /* Initialize the root directory */
6068 mem_set(buf, 0, sz_buf * ss);
6069 buf[SZDIRE * 0 + 0] = ET_VLABEL; /* Volume label entry (no label) */
6070 buf[SZDIRE * 1 + 0] = ET_BITMAP; /* Bitmap entry */
6071 st_dword(buf + SZDIRE * 1 + 20, 2); /* cluster */
6072 st_dword(buf + SZDIRE * 1 + 24, szb_bit); /* size */
6073 buf[SZDIRE * 2 + 0] = ET_UPCASE; /* Up-case table entry */
6074 st_dword(buf + SZDIRE * 2 + 4, sum); /* sum */
6075 st_dword(buf + SZDIRE * 2 + 20, 2 + tbl[0]); /* cluster */
6076 st_dword(buf + SZDIRE * 2 + 24, szb_case); /* size */
6077 sect = b_data + sz_au * (tbl[0] + tbl[1]); nsect = sz_au; /* Start of the root directory and number of sectors */
6078 do { /* Fill root directory sectors */
6079 n = (nsect > sz_buf) ? sz_buf : nsect;
6080 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6081 mem_set(buf, 0, ss);
6082 sect += n; nsect -= n;
6083 } while (nsect);
6084
6085 /* Create two set of the exFAT VBR blocks */
6086 sect = b_vol;
6087 for (n = 0; n < 2; n++) {
6088 /* Main record (+0) */
6089 mem_set(buf, 0, ss);
6090 mem_cpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
6091 st_qword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
6092 st_qword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
6093 st_dword(buf + BPB_FatOfsEx, (DWORD)(b_fat - b_vol)); /* FAT offset [sector] */
6094 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
6095 st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol)); /* Data offset [sector] */
6096 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
6097 st_dword(buf + BPB_RootClusEx, 2 + tbl[0] + tbl[1]); /* Root dir cluster # */
6098 st_dword(buf + BPB_VolIDEx, GET_FATTIME()); /* VSN */
6099 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */
6100 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
6101 for (buf[BPB_SecPerClusEx] = 0, i = sz_au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
6102 buf[BPB_NumFATsEx] = 1; /* Number of FATs */
6103 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
6104 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
6105 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
6106 for (i = sum = 0; i < ss; i++) { /* VBR checksum */
6107 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
6108 }
6109 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6110 /* Extended bootstrap record (+1..+8) */
6111 mem_set(buf, 0, ss);
6112 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
6113 for (j = 1; j < 9; j++) {
6114 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6115 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6116 }
6117 /* OEM/Reserved record (+9..+10) */
6118 mem_set(buf, 0, ss);
6119 for ( ; j < 11; j++) {
6120 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6121 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6122 }
6123 /* Sum record (+11) */
6124 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
6125 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6126 }
6127
6128 } else
6129 #endif /* FF_FS_EXFAT */
6130 { /* Create an FAT/FAT32 volume */
6131 do {
6132 pau = sz_au;
6133 /* Pre-determine number of clusters and FAT sub-type */
6134 if (fsty == FS_FAT32) { /* FAT32 volume */
6135 if (pau == 0) { /* AU auto-selection */
6136 n = (DWORD)sz_vol / 0x20000; /* Volume size in unit of 128KS */
6137 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
6138 }
6139 n_clst = (DWORD)sz_vol / pau; /* Number of clusters */
6140 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
6141 sz_rsv = 32; /* Number of reserved sectors */
6142 sz_dir = 0; /* No static directory */
6143 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED);
6144 } else { /* FAT volume */
6145 if (pau == 0) { /* au auto-selection */
6146 n = (DWORD)sz_vol / 0x1000; /* Volume size in unit of 4KS */
6147 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
6148 }
6149 n_clst = (DWORD)sz_vol / pau;
6150 if (n_clst > MAX_FAT12) {
6151 n = n_clst * 2 + 4; /* FAT size [byte] */
6152 } else {
6153 fsty = FS_FAT12;
6154 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
6155 }
6156 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
6157 sz_rsv = 1; /* Number of reserved sectors */
6158 sz_dir = (DWORD)n_root * SZDIRE / ss; /* Root dir size [sector] */
6159 }
6160 b_fat = b_vol + sz_rsv; /* FAT base */
6161 b_data = b_fat + sz_fat * n_fat + sz_dir; /* Data base */
6162
6163 /* Align data area to erase block boundary (for flash memory media) */
6164 n = (DWORD)(((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data); /* Sectors to next nearest from current data base */
6165 if (fsty == FS_FAT32) { /* FAT32: Move FAT */
6166 sz_rsv += n; b_fat += n;
6167 } else { /* FAT: Expand FAT */
6168 if (n % n_fat) { /* Adjust fractional error if needed */
6169 n--; sz_rsv++; b_fat++;
6170 }
6171 sz_fat += n / n_fat;
6172 }
6173
6174 /* Determine number of clusters and final check of validity of the FAT sub-type */
6175 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
6176 n_clst = ((DWORD)sz_vol - sz_rsv - sz_fat * n_fat - sz_dir) / pau;
6177 if (fsty == FS_FAT32) {
6178 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32? */
6179 if (sz_au == 0 && (sz_au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
6180 LEAVE_MKFS(FR_MKFS_ABORTED);
6181 }
6182 }
6183 if (fsty == FS_FAT16) {
6184 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
6185 if (sz_au == 0 && (pau * 2) <= 64) {
6186 sz_au = pau * 2; continue; /* Adjust cluster size and retry */
6187 }
6188 if ((fsopt & FM_FAT32)) {
6189 fsty = FS_FAT32; continue; /* Switch type to FAT32 and retry */
6190 }
6191 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6192 LEAVE_MKFS(FR_MKFS_ABORTED);
6193 }
6194 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
6195 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6196 LEAVE_MKFS(FR_MKFS_ABORTED);
6197 }
6198 }
6199 if (fsty == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */
6200
6201 /* Ok, it is the valid cluster configuration */
6202 break;
6203 } while (1);
6204
6205 #if FF_USE_TRIM
6206 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
6207 disk_ioctl(pdrv, CTRL_TRIM, lba);
6208 #endif
6209 /* Create FAT VBR */
6210 mem_set(buf, 0, ss);
6211 mem_cpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code (x86), OEM name */
6212 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
6213 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
6214 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
6215 buf[BPB_NumFATs] = (BYTE)n_fat; /* Number of FATs */
6216 st_word(buf + BPB_RootEntCnt, (WORD)((fsty == FS_FAT32) ? 0 : n_root)); /* Number of root directory entries */
6217 if (sz_vol < 0x10000) {
6218 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
6219 } else {
6220 st_dword(buf + BPB_TotSec32, (DWORD)sz_vol); /* Volume size in 32-bit LBA */
6221 }
6222 buf[BPB_Media] = 0xF8; /* Media descriptor byte */
6223 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
6224 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
6225 st_dword(buf + BPB_HiddSec, (DWORD)b_vol); /* Volume offset in the physical drive [sector] */
6226 if (fsty == FS_FAT32) {
6227 st_dword(buf + BS_VolID32, GET_FATTIME()); /* VSN */
6228 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
6229 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
6230 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
6231 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
6232 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
6233 buf[BS_BootSig32] = 0x29; /* Extended boot signature */
6234 mem_cpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
6235 } else {
6236 st_dword(buf + BS_VolID, GET_FATTIME()); /* VSN */
6237 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
6238 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
6239 buf[BS_BootSig] = 0x29; /* Extended boot signature */
6240 mem_cpy(buf + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
6241 }
6242 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
6243 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */
6244
6245 /* Create FSINFO record if needed */
6246 if (fsty == FS_FAT32) {
6247 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
6248 mem_set(buf, 0, ss);
6249 st_dword(buf + FSI_LeadSig, 0x41615252);
6250 st_dword(buf + FSI_StrucSig, 0x61417272);
6251 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
6252 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
6253 st_word(buf + BS_55AA, 0xAA55);
6254 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
6255 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
6256 }
6257
6258 /* Initialize FAT area */
6259 mem_set(buf, 0, sz_buf * ss);
6260 sect = b_fat; /* FAT start sector */
6261 for (i = 0; i < n_fat; i++) { /* Initialize FATs each */
6262 if (fsty == FS_FAT32) {
6263 st_dword(buf + 0, 0xFFFFFFF8); /* FAT[0] */
6264 st_dword(buf + 4, 0xFFFFFFFF); /* FAT[1] */
6265 st_dword(buf + 8, 0x0FFFFFFF); /* FAT[2] (root directory) */
6266 } else {
6267 st_dword(buf + 0, (fsty == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* FAT[0] and FAT[1] */
6268 }
6269 nsect = sz_fat; /* Number of FAT sectors */
6270 do { /* Fill FAT sectors */
6271 n = (nsect > sz_buf) ? sz_buf : nsect;
6272 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6273 mem_set(buf, 0, ss); /* Rest of FAT all are cleared */
6274 sect += n; nsect -= n;
6275 } while (nsect);
6276 }
6277
6278 /* Initialize root directory (fill with zero) */
6279 nsect = (fsty == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
6280 do {
6281 n = (nsect > sz_buf) ? sz_buf : nsect;
6282 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6283 sect += n; nsect -= n;
6284 } while (nsect);
6285 }
6286
6287 /* A FAT volume has been created here */
6288
6289 /* Determine system ID in the MBR partition table */
6290 if (FF_FS_EXFAT && fsty == FS_EXFAT) {
6291 sys = 0x07; /* exFAT */
6292 } else {
6293 if (fsty == FS_FAT32) {
6294 sys = 0x0C; /* FAT32X */
6295 } else {
6296 if (sz_vol >= 0x10000) {
6297 sys = 0x06; /* FAT12/16 (large) */
6298 } else {
6299 sys = (fsty == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */
6300 }
6301 }
6302 }
6303
6304 /* Update partition information */
6305 if (FF_MULTI_PARTITION && ipart != 0) { /* Volume is in the existing partition */
6306 if (!FF_LBA64 || !(fsopt & 0x80)) {
6307 /* Update system ID in the partition table */
6308 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */
6309 buf[MBR_Table + (ipart - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */
6310 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */
6311 }
6312 } else { /* Volume as a new single partition */
6313 if (!(fsopt & FM_SFD)) { /* Create partition table if not in SFD */
6314 lba[0] = sz_vol, lba[1] = 0;
6315 fr = create_partition(pdrv, lba, sys, buf);
6316 if (fr != FR_OK) LEAVE_MKFS(fr);
6317 }
6318 }
6319
6320 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6321
6322 LEAVE_MKFS(FR_OK);
6323 }
6324
6325
6326
6327
6328 #if FF_MULTI_PARTITION
6329 /*-----------------------------------------------------------------------*/
6330 /* Create Partition Table on the Physical Drive */
6331 /*-----------------------------------------------------------------------*/
6332
6333 FRESULT f_fdisk (
6334 BYTE pdrv, /* Physical drive number */
6335 const LBA_t ptbl[], /* Pointer to the size table for each partitions */
6336 void* work /* Pointer to the working buffer (null: use heap memory) */
6337 )
6338 {
6339 BYTE *buf = (BYTE*)work;
6340 DSTATUS stat;
6341
6342
6343 stat = disk_initialize(pdrv);
6344 if (stat & STA_NOINIT) return FR_NOT_READY;
6345 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
6346 #if FF_USE_LFN == 3
6347 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */
6348 #endif
6349 if (!buf) return FR_NOT_ENOUGH_CORE;
6350
6351 LEAVE_MKFS(create_partition(pdrv, ptbl, 0x07, buf));
6352 }
6353
6354 #endif /* FF_MULTI_PARTITION */
6355 #endif /* !FF_FS_READONLY && FF_USE_MKFS */
6356
6357
6358
6359
6360 #if FF_USE_STRFUNC
6361 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3)
6362 #error Wrong FF_STRF_ENCODE setting
6363 #endif
6364 /*-----------------------------------------------------------------------*/
6365 /* Get a String from the File */
6366 /*-----------------------------------------------------------------------*/
6367
6368 TCHAR* f_gets (
6369 TCHAR* buff, /* Pointer to the buffer to store read string */
6370 int len, /* Size of string buffer (items) */
6371 FIL* fp /* Pointer to the file object */
6372 )
6373 {
6374 int nc = 0;
6375 TCHAR *p = buff;
6376 BYTE s[4];
6377 UINT rc;
6378 DWORD dc;
6379 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2
6380 WCHAR wc;
6381 #endif
6382 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3
6383 UINT ct;
6384 #endif
6385
6386 #if FF_USE_LFN && FF_LFN_UNICODE /* With code conversion (Unicode API) */
6387 /* Make a room for the character and terminator */
6388 if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2;
6389 if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4;
6390 if (FF_LFN_UNICODE == 3) len -= 1;
6391 while (nc < len) {
6392 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */
6393 f_read(fp, s, 1, &rc); /* Get a code unit */
6394 if (rc != 1) break; /* EOF? */
6395 wc = s[0];
6396 if (dbc_1st((BYTE)wc)) { /* DBC 1st byte? */
6397 f_read(fp, s, 1, &rc); /* Get DBC 2nd byte */
6398 if (rc != 1 || !dbc_2nd(s[0])) continue; /* Wrong code? */
6399 wc = wc << 8 | s[0];
6400 }
6401 dc = ff_oem2uni(wc, CODEPAGE); /* OEM --> */
6402 if (dc == 0) continue;
6403 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */
6404 f_read(fp, s, 2, &rc); /* Get a code unit */
6405 if (rc != 2) break; /* EOF? */
6406 dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6407 if (IsSurrogateL(dc)) continue; /* Broken surrogate pair? */
6408 if (IsSurrogateH(dc)) { /* High surrogate? */
6409 f_read(fp, s, 2, &rc); /* Get low surrogate */
6410 if (rc != 2) break; /* EOF? */
6411 wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6412 if (!IsSurrogateL(wc)) continue; /* Broken surrogate pair? */
6413 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); /* Merge surrogate pair */
6414 }
6415 #else /* Read a character in UTF-8 */
6416 f_read(fp, s, 1, &rc); /* Get a code unit */
6417 if (rc != 1) break; /* EOF? */
6418 dc = s[0];
6419 if (dc >= 0x80) { /* Multi-byte sequence? */
6420 ct = 0;
6421 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } /* 2-byte sequence? */
6422 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } /* 3-byte sequence? */
6423 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } /* 4-byte sequence? */
6424 if (ct == 0) continue;
6425 f_read(fp, s, ct, &rc); /* Get trailing bytes */
6426 if (rc != ct) break;
6427 rc = 0;
6428 do { /* Merge the byte sequence */
6429 if ((s[rc] & 0xC0) != 0x80) break;
6430 dc = dc << 6 | (s[rc] & 0x3F);
6431 } while (++rc < ct);
6432 if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue; /* Wrong encoding? */
6433 }
6434 #endif
6435 /* A code point is avaialble in dc to be output */
6436
6437 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; /* Strip \r off if needed */
6438 #if FF_LFN_UNICODE == 1 || FF_LFN_UNICODE == 3 /* Output it in UTF-16/32 encoding */
6439 if (FF_LFN_UNICODE == 1 && dc >= 0x10000) { /* Out of BMP at UTF-16? */
6440 *p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++; /* Make and output high surrogate */
6441 dc = 0xDC00 | (dc & 0x3FF); /* Make low surrogate */
6442 }
6443 *p++ = (TCHAR)dc; nc++;
6444 if (dc == '\n') break; /* End of line? */
6445 #elif FF_LFN_UNICODE == 2 /* Output it in UTF-8 encoding */
6446 if (dc < 0x80) { /* Single byte? */
6447 *p++ = (TCHAR)dc;
6448 nc++;
6449 if (dc == '\n') break; /* End of line? */
6450 } else {
6451 if (dc < 0x800) { /* 2-byte sequence? */
6452 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F));
6453 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6454 nc += 2;
6455 } else {
6456 if (dc < 0x10000) { /* 3-byte sequence? */
6457 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F));
6458 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6459 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6460 nc += 3;
6461 } else { /* 4-byte sequence? */
6462 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07));
6463 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F));
6464 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6465 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6466 nc += 4;
6467 }
6468 }
6469 }
6470 #endif
6471 }
6472
6473 #else /* Byte-by-byte read without any conversion (ANSI/OEM API) */
6474 len -= 1; /* Make a room for the terminator */
6475 while (nc < len) {
6476 f_read(fp, s, 1, &rc); /* Get a byte */
6477 if (rc != 1) break; /* EOF? */
6478 dc = s[0];
6479 if (FF_USE_STRFUNC == 2 && dc == '\r') continue;
6480 *p++ = (TCHAR)dc; nc++;
6481 if (dc == '\n') break;
6482 }
6483 #endif
6484
6485 *p = 0; /* Terminate the string */
6486 return nc ? buff : 0; /* When no data read due to EOF or error, return with error. */
6487 }
6488
6489
6490
6491
6492 #if !FF_FS_READONLY
6493 #include <stdarg.h>
6494 /*-----------------------------------------------------------------------*/
6495 /* Put a Character to the File (sub-functions) */
6496 /*-----------------------------------------------------------------------*/
6497
6498 /* Putchar output buffer and work area */
6499
6500 typedef struct {
6501 FIL *fp; /* Ptr to the writing file */
6502 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */
6503 #if FF_USE_LFN && FF_LFN_UNICODE == 1
6504 WCHAR hs;
6505 #elif FF_USE_LFN && FF_LFN_UNICODE == 2
6506 BYTE bs[4];
6507 UINT wi, ct;
6508 #endif
6509 BYTE buf[64]; /* Write buffer */
6510 } putbuff;
6511
6512
6513 /* Buffered write with code conversion */
6514
6515 static void putc_bfd (putbuff* pb, TCHAR c)
6516 {
6517 UINT n;
6518 int i, nc;
6519 #if FF_USE_LFN && FF_LFN_UNICODE
6520 WCHAR hs, wc;
6521 #if FF_LFN_UNICODE == 2
6522 DWORD dc;
6523 TCHAR *tp;
6524 #endif
6525 #endif
6526
6527 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
6528 putc_bfd(pb, '\r');
6529 }
6530
6531 i = pb->idx; /* Write index of pb->buf[] */
6532 if (i < 0) return;
6533 nc = pb->nchr; /* Write unit counter */
6534
6535 #if FF_USE_LFN && FF_LFN_UNICODE
6536 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
6537 if (IsSurrogateH(c)) { /* High surrogate? */
6538 pb->hs = c; return; /* Save it for next */
6539 }
6540 hs = pb->hs; pb->hs = 0;
6541 if (hs != 0) { /* There is a leading high surrogate */
6542 if (!IsSurrogateL(c)) hs = 0; /* Discard high surrogate if not a surrogate pair */
6543 } else {
6544 if (IsSurrogateL(c)) return; /* Discard stray low surrogate */
6545 }
6546 wc = c;
6547 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
6548 for (;;) {
6549 if (pb->ct == 0) { /* Out of multi-byte sequence? */
6550 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */
6551 if ((BYTE)c < 0x80) break; /* Single byte? */
6552 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte sequence? */
6553 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte sequence? */
6554 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte sequence? */
6555 return;
6556 } else { /* In the multi-byte sequence */
6557 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */
6558 pb->ct = 0; continue;
6559 }
6560 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */
6561 if (--pb->ct == 0) break; /* End of multi-byte sequence? */
6562 return;
6563 }
6564 }
6565 tp = (TCHAR*)pb->bs;
6566 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */
6567 if (dc == 0xFFFFFFFF) return; /* Wrong code? */
6568 wc = (WCHAR)dc;
6569 hs = (WCHAR)(dc >> 16);
6570 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
6571 if (IsSurrogate(c) || c >= 0x110000) return; /* Discard invalid code */
6572 if (c >= 0x10000) { /* Out of BMP? */
6573 hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); /* Make high surrogate */
6574 wc = 0xDC00 | (c & 0x3FF); /* Make low surrogate */
6575 } else {
6576 hs = 0;
6577 wc = (WCHAR)c;
6578 }
6579 #endif
6580 /* A code point in UTF-16 is available in hs and wc */
6581
6582 #if FF_STRF_ENCODE == 1 /* Write a code point in UTF-16LE */
6583 if (hs != 0) { /* Surrogate pair? */
6584 st_word(&pb->buf[i], hs);
6585 i += 2;
6586 nc++;
6587 }
6588 st_word(&pb->buf[i], wc);
6589 i += 2;
6590 #elif FF_STRF_ENCODE == 2 /* Write a code point in UTF-16BE */
6591 if (hs != 0) { /* Surrogate pair? */
6592 pb->buf[i++] = (BYTE)(hs >> 8);
6593 pb->buf[i++] = (BYTE)hs;
6594 nc++;
6595 }
6596 pb->buf[i++] = (BYTE)(wc >> 8);
6597 pb->buf[i++] = (BYTE)wc;
6598 #elif FF_STRF_ENCODE == 3 /* Write a code point in UTF-8 */
6599 if (hs != 0) { /* 4-byte sequence? */
6600 nc += 3;
6601 hs = (hs & 0x3FF) + 0x40;
6602 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8);
6603 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F));
6604 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F));
6605 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6606 } else {
6607 if (wc < 0x80) { /* Single byte? */
6608 pb->buf[i++] = (BYTE)wc;
6609 } else {
6610 if (wc < 0x800) { /* 2-byte sequence? */
6611 nc += 1;
6612 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6);
6613 } else { /* 3-byte sequence */
6614 nc += 2;
6615 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12);
6616 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F));
6617 }
6618 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6619 }
6620 }
6621 #else /* Write a code point in ANSI/OEM */
6622 if (hs != 0) return;
6623 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */
6624 if (wc == 0) return;
6625 if (wc >= 0x100) {
6626 pb->buf[i++] = (BYTE)(wc >> 8); nc++;
6627 }
6628 pb->buf[i++] = (BYTE)wc;
6629 #endif
6630
6631 #else /* ANSI/OEM input (without re-encoding) */
6632 pb->buf[i++] = (BYTE)c;
6633 #endif
6634
6635 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */
6636 f_write(pb->fp, pb->buf, (UINT)i, &n);
6637 i = (n == (UINT)i) ? 0 : -1;
6638 }
6639 pb->idx = i;
6640 pb->nchr = nc + 1;
6641 }
6642
6643
6644 /* Flush remaining characters in the buffer */
6645
6646 static int putc_flush (putbuff* pb)
6647 {
6648 UINT nw;
6649
6650 if ( pb->idx >= 0 /* Flush buffered characters to the file */
6651 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
6652 && (UINT)pb->idx == nw) return pb->nchr;
6653 return EOF;
6654 }
6655
6656
6657 /* Initialize write buffer */
6658
6659 static void putc_init (putbuff* pb, FIL* fp)
6660 {
6661 mem_set(pb, 0, sizeof (putbuff));
6662 pb->fp = fp;
6663 }
6664
6665
6666
6667 int f_putc (
6668 TCHAR c, /* A character to be output */
6669 FIL* fp /* Pointer to the file object */
6670 )
6671 {
6672 putbuff pb;
6673
6674
6675 putc_init(&pb, fp);
6676 putc_bfd(&pb, c); /* Put the character */
6677 return putc_flush(&pb);
6678 }
6679
6680
6681
6682
6683 /*-----------------------------------------------------------------------*/
6684 /* Put a String to the File */
6685 /*-----------------------------------------------------------------------*/
6686
6687 int f_puts (
6688 const TCHAR* str, /* Pointer to the string to be output */
6689 FIL* fp /* Pointer to the file object */
6690 )
6691 {
6692 putbuff pb;
6693
6694
6695 putc_init(&pb, fp);
6696 while (*str) putc_bfd(&pb, *str++); /* Put the string */
6697 return putc_flush(&pb);
6698 }
6699
6700
6701
6702
6703 /*-----------------------------------------------------------------------*/
6704 /* Put a Formatted String to the File */
6705 /*-----------------------------------------------------------------------*/
6706
6707 int f_printf (
6708 FIL* fp, /* Pointer to the file object */
6709 const TCHAR* fmt, /* Pointer to the format string */
6710 ... /* Optional arguments... */
6711 )
6712 {
6713 va_list arp;
6714 putbuff pb;
6715 BYTE f, r;
6716 UINT i, j, w;
6717 DWORD v;
6718 TCHAR c, d, str[32], *p;
6719
6720
6721 putc_init(&pb, fp);
6722
6723 va_start(arp, fmt);
6724
6725 for (;;) {
6726 c = *fmt++;
6727 if (c == 0) break; /* End of string */
6728 if (c != '%') { /* Non escape character */
6729 putc_bfd(&pb, c);
6730 continue;
6731 }
6732 w = f = 0;
6733 c = *fmt++;
6734 if (c == '0') { /* Flag: '0' padding */
6735 f = 1; c = *fmt++;
6736 } else {
6737 if (c == '-') { /* Flag: left justified */
6738 f = 2; c = *fmt++;
6739 }
6740 }
6741 if (c == '*') { /* Minimum width by argument */
6742 w = va_arg(arp, int);
6743 c = *fmt++;
6744 } else {
6745 while (IsDigit(c)) { /* Minimum width */
6746 w = w * 10 + c - '0';
6747 c = *fmt++;
6748 }
6749 }
6750 if (c == 'l' || c == 'L') { /* Type prefix: Size is long int */
6751 f |= 4; c = *fmt++;
6752 }
6753 if (c == 0) break;
6754 d = c;
6755 if (IsLower(d)) d -= 0x20;
6756 switch (d) { /* Atgument type is... */
6757 case 'S' : /* String */
6758 p = va_arg(arp, TCHAR*);
6759 for (j = 0; p[j]; j++) ;
6760 if (!(f & 2)) { /* Right padded */
6761 while (j++ < w) putc_bfd(&pb, ' ') ;
6762 }
6763 while (*p) putc_bfd(&pb, *p++) ; /* String body */
6764 while (j++ < w) putc_bfd(&pb, ' ') ; /* Left padded */
6765 continue;
6766
6767 case 'C' : /* Character */
6768 putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
6769
6770 case 'B' : /* Unsigned binary */
6771 r = 2; break;
6772
6773 case 'O' : /* Unsigned octal */
6774 r = 8; break;
6775
6776 case 'D' : /* Signed decimal */
6777 case 'U' : /* Unsigned decimal */
6778 r = 10; break;
6779
6780 case 'X' : /* Unsigned hexdecimal */
6781 r = 16; break;
6782
6783 default: /* Unknown type (pass-through) */
6784 putc_bfd(&pb, c); continue;
6785 }
6786
6787 /* Get an argument and put it in numeral */
6788 v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
6789 if (d == 'D' && (v & 0x80000000)) {
6790 v = 0 - v;
6791 f |= 8;
6792 }
6793 i = 0;
6794 do {
6795 d = (TCHAR)(v % r); v /= r;
6796 if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
6797 str[i++] = d + '0';
6798 } while (v && i < sizeof str / sizeof *str);
6799 if (f & 8) str[i++] = '-';
6800 j = i; d = (f & 1) ? '0' : ' ';
6801 if (!(f & 2)) {
6802 while (j++ < w) putc_bfd(&pb, d); /* Right pad */
6803 }
6804 do {
6805 putc_bfd(&pb, str[--i]); /* Number body */
6806 } while (i);
6807 while (j++ < w) putc_bfd(&pb, d); /* Left pad */
6808 }
6809
6810 va_end(arp);
6811
6812 return putc_flush(&pb);
6813 }
6814
6815 #endif /* !FF_FS_READONLY */
6816 #endif /* FF_USE_STRFUNC */
6817
6818
6819
6820 #if FF_CODE_PAGE == 0
6821 /*-----------------------------------------------------------------------*/
6822 /* Set Active Codepage for the Path Name */
6823 /*-----------------------------------------------------------------------*/
6824
6825 FRESULT f_setcp (
6826 WORD cp /* Value to be set as active code page */
6827 )
6828 {
6829 static const WORD validcp[] = { 437, 720, 737, 771, 775, 850, 852, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0};
6830 static const BYTE* const tables[] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};
6831 UINT i;
6832
6833
6834 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */
6835 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */
6836
6837 CodePage = cp;
6838 if (cp >= 900) { /* DBCS */
6839 ExCvt = 0;
6840 DbcTbl = tables[i];
6841 } else { /* SBCS */
6842 ExCvt = tables[i];
6843 DbcTbl = 0;
6844 }
6845 return FR_OK;
6846 }
6847 #endif /* FF_CODE_PAGE == 0 */
6848
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