1 /*----------------------------------------------------------------------------/
2 / FatFs - Generic FAT Filesystem Module R0.14b /
3 /-----------------------------------------------------------------------------/
4 /
5 / Copyright (C) 2021, 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 <string.h>
23 #include "ff.h" /* Declarations of FatFs API */
24 #include "diskio.h" /* Declarations of device I/O functions */
25
26
27 /*--------------------------------------------------------------------------
28
29 Module Private Definitions
30
31 ---------------------------------------------------------------------------*/
32
33 #if FF_DEFINED != 86631 /* Revision ID */
34 #error Wrong include file (ff.h).
35 #endif
36
37
38 /* Limits and boundaries */
39 #define MAX_DIR 0x200000 /* Max size of FAT directory */
40 #define MAX_DIR_EX 0x10000000 /* Max size of exFAT directory */
41 #define MAX_FAT12 0xFF5 /* Max FAT12 clusters (differs from specs, but right for real DOS/Windows behavior) */
42 #define MAX_FAT16 0xFFF5 /* Max FAT16 clusters (differs from specs, but right for real DOS/Windows behavior) */
43 #define MAX_FAT32 0x0FFFFFF5 /* Max FAT32 clusters (not specified, practical limit) */
44 #define MAX_EXFAT 0x7FFFFFFD /* Max exFAT clusters (differs from specs, implementation limit) */
45
46
47 /* Character code support macros */
48 #define IsUpper(c) ((c) >= 'A' && (c) <= 'Z')
49 #define IsLower(c) ((c) >= 'a' && (c) <= 'z')
50 #define IsDigit(c) ((c) >= '0' && (c) <= '9')
51 #define IsSeparator(c) ((c) == '/' || (c) == '\\')
52 #define IsTerminator(c) ((UINT)(c) < (FF_USE_LFN ? ' ' : '!'))
53 #define IsSurrogate(c) ((c) >= 0xD800 && (c) <= 0xDFFF)
54 #define IsSurrogateH(c) ((c) >= 0xD800 && (c) <= 0xDBFF)
55 #define IsSurrogateL(c) ((c) >= 0xDC00 && (c) <= 0xDFFF)
56
57
58 /* Additional file access control and file status flags for internal use */
59 #define FA_SEEKEND 0x20 /* Seek to end of the file on file open */
60 #define FA_MODIFIED 0x40 /* File has been modified */
61 #define FA_DIRTY 0x80 /* FIL.buf[] needs to be written-back */
62
63
64 /* Additional file attribute bits for internal use */
65 #define AM_VOL 0x08 /* Volume label */
66 #define AM_LFN 0x0F /* LFN entry */
67 #define AM_MASK 0x3F /* Mask of defined bits in FAT */
68 #define AM_MASKX 0x37 /* Mask of defined bits in exFAT */
69
70
71 /* Name status flags in fn[11] */
72 #define NSFLAG 11 /* Index of the name status byte */
73 #define NS_LOSS 0x01 /* Out of 8.3 format */
74 #define NS_LFN 0x02 /* Force to create LFN entry */
75 #define NS_LAST 0x04 /* Last segment */
76 #define NS_BODY 0x08 /* Lower case flag (body) */
77 #define NS_EXT 0x10 /* Lower case flag (ext) */
78 #define NS_DOT 0x20 /* Dot entry */
79 #define NS_NOLFN 0x40 /* Do not find LFN */
80 #define NS_NONAME 0x80 /* Not followed */
81
82
83 /* exFAT directory entry types */
84 #define ET_BITMAP 0x81 /* Allocation bitmap */
85 #define ET_UPCASE 0x82 /* Up-case table */
86 #define ET_VLABEL 0x83 /* Volume label */
87 #define ET_FILEDIR 0x85 /* File and directory */
88 #define ET_STREAM 0xC0 /* Stream extension */
89 #define ET_FILENAME 0xC1 /* Name extension */
90
91
92 /* FatFs refers the FAT structure as simple byte array instead of structure member
93 / because the C structure is not binary compatible between different platforms */
94
95 #define BS_JmpBoot 0 /* x86 jump instruction (3-byte) */
96 #define BS_OEMName 3 /* OEM name (8-byte) */
97 #define BPB_BytsPerSec 11 /* Sector size [byte] (WORD) */
98 #define BPB_SecPerClus 13 /* Cluster size [sector] (BYTE) */
99 #define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (WORD) */
100 #define BPB_NumFATs 16 /* Number of FATs (BYTE) */
101 #define BPB_RootEntCnt 17 /* Size of root directory area for FAT [entry] (WORD) */
102 #define BPB_TotSec16 19 /* Volume size (16-bit) [sector] (WORD) */
103 #define BPB_Media 21 /* Media descriptor byte (BYTE) */
104 #define BPB_FATSz16 22 /* FAT size (16-bit) [sector] (WORD) */
105 #define BPB_SecPerTrk 24 /* Number of sectors per track for int13h [sector] (WORD) */
106 #define BPB_NumHeads 26 /* Number of heads for int13h (WORD) */
107 #define BPB_HiddSec 28 /* Volume offset from top of the drive (DWORD) */
108 #define BPB_TotSec32 32 /* Volume size (32-bit) [sector] (DWORD) */
109 #define BS_DrvNum 36 /* Physical drive number for int13h (BYTE) */
110 #define BS_NTres 37 /* WindowsNT error flag (BYTE) */
111 #define BS_BootSig 38 /* Extended boot signature (BYTE) */
112 #define BS_VolID 39 /* Volume serial number (DWORD) */
113 #define BS_VolLab 43 /* Volume label string (8-byte) */
114 #define BS_FilSysType 54 /* Filesystem type string (8-byte) */
115 #define BS_BootCode 62 /* Boot code (448-byte) */
116 #define BS_55AA 510 /* Signature word (WORD) */
117
118 #define BPB_FATSz32 36 /* FAT32: FAT size [sector] (DWORD) */
119 #define BPB_ExtFlags32 40 /* FAT32: Extended flags (WORD) */
120 #define BPB_FSVer32 42 /* FAT32: Filesystem version (WORD) */
121 #define BPB_RootClus32 44 /* FAT32: Root directory cluster (DWORD) */
122 #define BPB_FSInfo32 48 /* FAT32: Offset of FSINFO sector (WORD) */
123 #define BPB_BkBootSec32 50 /* FAT32: Offset of backup boot sector (WORD) */
124 #define BS_DrvNum32 64 /* FAT32: Physical drive number for int13h (BYTE) */
125 #define BS_NTres32 65 /* FAT32: Error flag (BYTE) */
126 #define BS_BootSig32 66 /* FAT32: Extended boot signature (BYTE) */
127 #define BS_VolID32 67 /* FAT32: Volume serial number (DWORD) */
128 #define BS_VolLab32 71 /* FAT32: Volume label string (8-byte) */
129 #define BS_FilSysType32 82 /* FAT32: Filesystem type string (8-byte) */
130 #define BS_BootCode32 90 /* FAT32: Boot code (420-byte) */
131
132 #define BPB_ZeroedEx 11 /* exFAT: MBZ field (53-byte) */
133 #define BPB_VolOfsEx 64 /* exFAT: Volume offset from top of the drive [sector] (QWORD) */
134 #define BPB_TotSecEx 72 /* exFAT: Volume size [sector] (QWORD) */
135 #define BPB_FatOfsEx 80 /* exFAT: FAT offset from top of the volume [sector] (DWORD) */
136 #define BPB_FatSzEx 84 /* exFAT: FAT size [sector] (DWORD) */
137 #define BPB_DataOfsEx 88 /* exFAT: Data offset from top of the volume [sector] (DWORD) */
138 #define BPB_NumClusEx 92 /* exFAT: Number of clusters (DWORD) */
139 #define BPB_RootClusEx 96 /* exFAT: Root directory start cluster (DWORD) */
140 #define BPB_VolIDEx 100 /* exFAT: Volume serial number (DWORD) */
141 #define BPB_FSVerEx 104 /* exFAT: Filesystem version (WORD) */
142 #define BPB_VolFlagEx 106 /* exFAT: Volume flags (WORD) */
143 #define BPB_BytsPerSecEx 108 /* exFAT: Log2 of sector size in unit of byte (BYTE) */
144 #define BPB_SecPerClusEx 109 /* exFAT: Log2 of cluster size in unit of sector (BYTE) */
145 #define BPB_NumFATsEx 110 /* exFAT: Number of FATs (BYTE) */
146 #define BPB_DrvNumEx 111 /* exFAT: Physical drive number for int13h (BYTE) */
147 #define BPB_PercInUseEx 112 /* exFAT: Percent in use (BYTE) */
148 #define BPB_RsvdEx 113 /* exFAT: Reserved (7-byte) */
149 #define BS_BootCodeEx 120 /* exFAT: Boot code (390-byte) */
150
151 #define DIR_Name 0 /* Short file name (11-byte) */
152 #define DIR_Attr 11 /* Attribute (BYTE) */
153 #define DIR_NTres 12 /* Lower case flag (BYTE) */
154 #define DIR_CrtTime10 13 /* Created time sub-second (BYTE) */
155 #define DIR_CrtTime 14 /* Created time (DWORD) */
156 #define DIR_LstAccDate 18 /* Last accessed date (WORD) */
157 #define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (WORD) */
158 #define DIR_ModTime 22 /* Modified time (DWORD) */
159 #define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (WORD) */
160 #define DIR_FileSize 28 /* File size (DWORD) */
161 #define LDIR_Ord 0 /* LFN: LFN order and LLE flag (BYTE) */
162 #define LDIR_Attr 11 /* LFN: LFN attribute (BYTE) */
163 #define LDIR_Type 12 /* LFN: Entry type (BYTE) */
164 #define LDIR_Chksum 13 /* LFN: Checksum of the SFN (BYTE) */
165 #define LDIR_FstClusLO 26 /* LFN: MBZ field (WORD) */
166 #define XDIR_Type 0 /* exFAT: Type of exFAT directory entry (BYTE) */
167 #define XDIR_NumLabel 1 /* exFAT: Number of volume label characters (BYTE) */
168 #define XDIR_Label 2 /* exFAT: Volume label (11-WORD) */
169 #define XDIR_CaseSum 4 /* exFAT: Sum of case conversion table (DWORD) */
170 #define XDIR_NumSec 1 /* exFAT: Number of secondary entries (BYTE) */
171 #define XDIR_SetSum 2 /* exFAT: Sum of the set of directory entries (WORD) */
172 #define XDIR_Attr 4 /* exFAT: File attribute (WORD) */
173 #define XDIR_CrtTime 8 /* exFAT: Created time (DWORD) */
174 #define XDIR_ModTime 12 /* exFAT: Modified time (DWORD) */
175 #define XDIR_AccTime 16 /* exFAT: Last accessed time (DWORD) */
176 #define XDIR_CrtTime10 20 /* exFAT: Created time subsecond (BYTE) */
177 #define XDIR_ModTime10 21 /* exFAT: Modified time subsecond (BYTE) */
178 #define XDIR_CrtTZ 22 /* exFAT: Created timezone (BYTE) */
179 #define XDIR_ModTZ 23 /* exFAT: Modified timezone (BYTE) */
180 #define XDIR_AccTZ 24 /* exFAT: Last accessed timezone (BYTE) */
181 #define XDIR_GenFlags 33 /* exFAT: General secondary flags (BYTE) */
182 #define XDIR_NumName 35 /* exFAT: Number of file name characters (BYTE) */
183 #define XDIR_NameHash 36 /* exFAT: Hash of file name (WORD) */
184 #define XDIR_ValidFileSize 40 /* exFAT: Valid file size (QWORD) */
185 #define XDIR_FstClus 52 /* exFAT: First cluster of the file data (DWORD) */
186 #define XDIR_FileSize 56 /* exFAT: File/Directory size (QWORD) */
187
188 #define SZDIRE 32 /* Size of a directory entry */
189 #define DDEM 0xE5 /* Deleted directory entry mark set to DIR_Name[0] */
190 #define RDDEM 0x05 /* Replacement of the character collides with DDEM */
191 #define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
192
193 #define FSI_LeadSig 0 /* FAT32 FSI: Leading signature (DWORD) */
194 #define FSI_StrucSig 484 /* FAT32 FSI: Structure signature (DWORD) */
195 #define FSI_Free_Count 488 /* FAT32 FSI: Number of free clusters (DWORD) */
196 #define FSI_Nxt_Free 492 /* FAT32 FSI: Last allocated cluster (DWORD) */
197
198 #define MBR_Table 446 /* MBR: Offset of partition table in the MBR */
199 #define SZ_PTE 16 /* MBR: Size of a partition table entry */
200 #define PTE_Boot 0 /* MBR PTE: Boot indicator */
201 #define PTE_StHead 1 /* MBR PTE: Start head */
202 #define PTE_StSec 2 /* MBR PTE: Start sector */
203 #define PTE_StCyl 3 /* MBR PTE: Start cylinder */
204 #define PTE_System 4 /* MBR PTE: System ID */
205 #define PTE_EdHead 5 /* MBR PTE: End head */
206 #define PTE_EdSec 6 /* MBR PTE: End sector */
207 #define PTE_EdCyl 7 /* MBR PTE: End cylinder */
208 #define PTE_StLba 8 /* MBR PTE: Start in LBA */
209 #define PTE_SizLba 12 /* MBR PTE: Size in LBA */
210
211 #define GPTH_Sign 0 /* GPT: Header signature (8-byte) */
212 #define GPTH_Rev 8 /* GPT: Revision (DWORD) */
213 #define GPTH_Size 12 /* GPT: Header size (DWORD) */
214 #define GPTH_Bcc 16 /* GPT: Header BCC (DWORD) */
215 #define GPTH_CurLba 24 /* GPT: Main header LBA (QWORD) */
216 #define GPTH_BakLba 32 /* GPT: Backup header LBA (QWORD) */
217 #define GPTH_FstLba 40 /* GPT: First LBA for partitions (QWORD) */
218 #define GPTH_LstLba 48 /* GPT: Last LBA for partitions (QWORD) */
219 #define GPTH_DskGuid 56 /* GPT: Disk GUID (16-byte) */
220 #define GPTH_PtOfs 72 /* GPT: Partation table LBA (QWORD) */
221 #define GPTH_PtNum 80 /* GPT: Number of table entries (DWORD) */
222 #define GPTH_PteSize 84 /* GPT: Size of table entry (DWORD) */
223 #define GPTH_PtBcc 88 /* GPT: Partation table BCC (DWORD) */
224 #define SZ_GPTE 128 /* GPT: Size of partition table entry */
225 #define GPTE_PtGuid 0 /* GPT PTE: Partition type GUID (16-byte) */
226 #define GPTE_UpGuid 16 /* GPT PTE: Partition unique GUID (16-byte) */
227 #define GPTE_FstLba 32 /* GPT PTE: First LBA (QWORD) */
228 #define GPTE_LstLba 40 /* GPT PTE: Last LBA inclusive (QWORD) */
229 #define GPTE_Flags 48 /* GPT PTE: Flags (QWORD) */
230 #define GPTE_Name 56 /* GPT PTE: Name */
231
232
233 /* Post process on fatal error in the file operations */
234 #define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
235
236
237 /* Re-entrancy related */
238 #if FF_FS_REENTRANT
239 #if FF_USE_LFN == 1
240 #error Static LFN work area cannot be used in thread-safe configuration
241 #endif
242 #define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
243 #else
244 #define LEAVE_FF(fs, res) return res
245 #endif
246
247
248 /* Definitions of logical drive - physical location conversion */
249 #if FF_MULTI_PARTITION
250 #define LD2PD(vol) VolToPart[vol].pd /* Get physical drive number */
251 #define LD2PT(vol) VolToPart[vol].pt /* Get partition number (0:auto search, 1..:forced partition number) */
252 #else
253 #define LD2PD(vol) (BYTE)(vol) /* Each logical drive is associated with the same physical drive number */
254 #define LD2PT(vol) 0 /* Auto partition search */
255 #endif
256
257
258 /* Definitions of sector size */
259 #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)
260 #error Wrong sector size configuration
261 #endif
262 #if FF_MAX_SS == FF_MIN_SS
263 #define SS(fs) ((UINT)FF_MAX_SS) /* Fixed sector size */
264 #else
265 #define SS(fs) ((fs)->ssize) /* Variable sector size */
266 #endif
267
268
269 /* Timestamp */
270 #if FF_FS_NORTC == 1
271 #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
272 #error Invalid FF_FS_NORTC settings
273 #endif
274 #define GET_FATTIME() ((DWORD)(FF_NORTC_YEAR - 1980) << 25 | (DWORD)FF_NORTC_MON << 21 | (DWORD)FF_NORTC_MDAY << 16)
275 #else
276 #define GET_FATTIME() get_fattime()
277 #endif
278
279
280 /* File lock controls */
281 #if FF_FS_LOCK != 0
282 #if FF_FS_READONLY
283 #error FF_FS_LOCK must be 0 at read-only configuration
284 #endif
285 typedef struct {
286 FATFS *fs; /* Object ID 1, volume (NULL:blank entry) */
287 DWORD clu; /* Object ID 2, containing directory (0:root) */
288 DWORD ofs; /* Object ID 3, offset in the directory */
289 WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
290 } FILESEM;
291 #endif
292
293
294 /* SBCS up-case tables (\x80-\xFF) */
295 #define TBL_CT437 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
296 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
297 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
298 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
299 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
300 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
301 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
302 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
303 #define TBL_CT720 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
304 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
305 0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
306 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
307 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
308 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
309 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
310 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
311 #define TBL_CT737 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
312 0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
313 0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
314 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
315 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
316 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
317 0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
318 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
319 #define TBL_CT771 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
320 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
321 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
322 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
323 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
324 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
325 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
326 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
327 #define TBL_CT775 {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
328 0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
329 0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
330 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
331 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
332 0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
333 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
334 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
335 #define TBL_CT850 {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
336 0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
337 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
338 0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
339 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
340 0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
341 0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
342 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
343 #define TBL_CT852 {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
344 0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
345 0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
346 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
347 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
348 0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
349 0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
350 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
351 #define TBL_CT855 {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
352 0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
353 0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
354 0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
355 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
356 0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
357 0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
358 0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
359 #define TBL_CT857 {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
360 0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
361 0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
362 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
363 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
364 0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
365 0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
366 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
367 #define TBL_CT860 {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
368 0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
369 0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
370 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
371 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
372 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
373 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
374 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
375 #define TBL_CT861 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
376 0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
377 0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
378 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
379 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
380 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
381 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
382 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
383 #define TBL_CT862 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
384 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
385 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
386 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
387 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
388 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
389 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
390 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
391 #define TBL_CT863 {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
392 0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
393 0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
394 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
395 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
396 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
397 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
398 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
399 #define TBL_CT864 {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
400 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
401 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
402 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
403 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
404 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
405 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
406 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
407 #define TBL_CT865 {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
408 0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
409 0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
410 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
411 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
412 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
413 0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
414 0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
415 #define TBL_CT866 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
416 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
417 0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
418 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
419 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
420 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
421 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
422 0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
423 #define TBL_CT869 {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
424 0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
425 0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
426 0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
427 0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
428 0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
429 0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
430 0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
431
432
433 /* DBCS code range |----- 1st byte -----| |----------- 2nd byte -----------| */
434 /* <------> <------> <------> <------> <------> */
435 #define TBL_DC932 {0x81, 0x9F, 0xE0, 0xFC, 0x40, 0x7E, 0x80, 0xFC, 0x00, 0x00}
436 #define TBL_DC936 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0x80, 0xFE, 0x00, 0x00}
437 #define TBL_DC949 {0x81, 0xFE, 0x00, 0x00, 0x41, 0x5A, 0x61, 0x7A, 0x81, 0xFE}
438 #define TBL_DC950 {0x81, 0xFE, 0x00, 0x00, 0x40, 0x7E, 0xA1, 0xFE, 0x00, 0x00}
439
440
441 /* Macros for table definitions */
442 #define MERGE_2STR(a, b) a ## b
443 #define MKCVTBL(hd, cp) MERGE_2STR(hd, cp)
444
445
446
447
448 /*--------------------------------------------------------------------------
449
450 Module Private Work Area
451
452 ---------------------------------------------------------------------------*/
453 /* Remark: Variables defined here without initial value shall be guaranteed
454 / zero/null at start-up. If not, the linker option or start-up routine is
455 / not compliance with C standard. */
456
457 /*--------------------------------*/
458 /* File/Volume controls */
459 /*--------------------------------*/
460
461 #if FF_VOLUMES < 1 || FF_VOLUMES > 10
462 #error Wrong FF_VOLUMES setting
463 #endif
464 static FATFS* FatFs[FF_VOLUMES]; /* Pointer to the filesystem objects (logical drives) */
465 static WORD Fsid; /* Filesystem mount ID */
466
467 #if FF_FS_RPATH != 0
468 static BYTE CurrVol; /* Current drive */
469 #endif
470
471 #if FF_FS_LOCK != 0
472 static FILESEM Files[FF_FS_LOCK]; /* Open object lock semaphores */
473 #endif
474
475 #if FF_STR_VOLUME_ID
476 #ifdef FF_VOLUME_STRS
477 static const char* const VolumeStr[FF_VOLUMES] = {FF_VOLUME_STRS}; /* Pre-defined volume ID */
478 #endif
479 #endif
480
481 #if FF_LBA64
482 #if FF_MIN_GPT > 0x100000000
483 #error Wrong FF_MIN_GPT setting
484 #endif
485 static const BYTE GUID_MS_Basic[16] = {0xA2,0xA0,0xD0,0xEB,0xE5,0xB9,0x33,0x44,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7};
486 #endif
487
488
489
490 /*--------------------------------*/
491 /* LFN/Directory working buffer */
492 /*--------------------------------*/
493
494 #if FF_USE_LFN == 0 /* Non-LFN configuration */
495 #if FF_FS_EXFAT
496 #error LFN must be enabled when enable exFAT
497 #endif
498 #define DEF_NAMBUF
499 #define INIT_NAMBUF(fs)
500 #define FREE_NAMBUF()
501 #define LEAVE_MKFS(res) return res
502
503 #else /* LFN configurations */
504 #if FF_MAX_LFN < 12 || FF_MAX_LFN > 255
505 #error Wrong setting of FF_MAX_LFN
506 #endif
507 #if FF_LFN_BUF < FF_SFN_BUF || FF_SFN_BUF < 12
508 #error Wrong setting of FF_LFN_BUF or FF_SFN_BUF
509 #endif
510 #if FF_LFN_UNICODE < 0 || FF_LFN_UNICODE > 3
511 #error Wrong setting of FF_LFN_UNICODE
512 #endif
513 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 */
514 #define MAXDIRB(nc) ((nc + 44U) / 15 * SZDIRE) /* exFAT: Size of directory entry block scratchpad buffer needed for the name length */
515
516 #if FF_USE_LFN == 1 /* LFN enabled with static working buffer */
517 #if FF_FS_EXFAT
518 static BYTE DirBuf[MAXDIRB(FF_MAX_LFN)]; /* Directory entry block scratchpad buffer */
519 #endif
520 static WCHAR LfnBuf[FF_MAX_LFN + 1]; /* LFN working buffer */
521 #define DEF_NAMBUF
522 #define INIT_NAMBUF(fs)
523 #define FREE_NAMBUF()
524 #define LEAVE_MKFS(res) return res
525
526 #elif FF_USE_LFN == 2 /* LFN enabled with dynamic working buffer on the stack */
527 #if FF_FS_EXFAT
528 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; BYTE dbuf[MAXDIRB(FF_MAX_LFN)]; /* LFN working buffer and directory entry block scratchpad buffer */
529 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; (fs)->dirbuf = dbuf; }
530 #define FREE_NAMBUF()
531 #else
532 #define DEF_NAMBUF WCHAR lbuf[FF_MAX_LFN+1]; /* LFN working buffer */
533 #define INIT_NAMBUF(fs) { (fs)->lfnbuf = lbuf; }
534 #define FREE_NAMBUF()
535 #endif
536 #define LEAVE_MKFS(res) return res
537
538 #elif FF_USE_LFN == 3 /* LFN enabled with dynamic working buffer on the heap */
539 #if FF_FS_EXFAT
540 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer and directory entry block scratchpad buffer */
541 #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); }
542 #define FREE_NAMBUF() ff_memfree(lfn)
543 #else
544 #define DEF_NAMBUF WCHAR *lfn; /* Pointer to LFN working buffer */
545 #define INIT_NAMBUF(fs) { lfn = ff_memalloc((FF_MAX_LFN+1)*2); if (!lfn) LEAVE_FF(fs, FR_NOT_ENOUGH_CORE); (fs)->lfnbuf = lfn; }
546 #define FREE_NAMBUF() ff_memfree(lfn)
547 #endif
548 #define LEAVE_MKFS(res) { if (!work) ff_memfree(buf); return res; }
549 #define MAX_MALLOC 0x8000 /* Must be >=FF_MAX_SS */
550
551 #else
552 #error Wrong setting of FF_USE_LFN
553
554 #endif /* FF_USE_LFN == 1 */
555 #endif /* FF_USE_LFN == 0 */
556
557
558
559 /*--------------------------------*/
560 /* Code conversion tables */
561 /*--------------------------------*/
562
563 #if FF_CODE_PAGE == 0 /* Run-time code page configuration */
564 #define CODEPAGE CodePage
565 static WORD CodePage; /* Current code page */
566 static const BYTE *ExCvt, *DbcTbl; /* Pointer to current SBCS up-case table and DBCS code range table below */
567
568 static const BYTE Ct437[] = TBL_CT437;
569 static const BYTE Ct720[] = TBL_CT720;
570 static const BYTE Ct737[] = TBL_CT737;
571 static const BYTE Ct771[] = TBL_CT771;
572 static const BYTE Ct775[] = TBL_CT775;
573 static const BYTE Ct850[] = TBL_CT850;
574 static const BYTE Ct852[] = TBL_CT852;
575 static const BYTE Ct855[] = TBL_CT855;
576 static const BYTE Ct857[] = TBL_CT857;
577 static const BYTE Ct860[] = TBL_CT860;
578 static const BYTE Ct861[] = TBL_CT861;
579 static const BYTE Ct862[] = TBL_CT862;
580 static const BYTE Ct863[] = TBL_CT863;
581 static const BYTE Ct864[] = TBL_CT864;
582 static const BYTE Ct865[] = TBL_CT865;
583 static const BYTE Ct866[] = TBL_CT866;
584 static const BYTE Ct869[] = TBL_CT869;
585 static const BYTE Dc932[] = TBL_DC932;
586 static const BYTE Dc936[] = TBL_DC936;
587 static const BYTE Dc949[] = TBL_DC949;
588 static const BYTE Dc950[] = TBL_DC950;
589
590 #elif FF_CODE_PAGE < 900 /* Static code page configuration (SBCS) */
591 #define CODEPAGE FF_CODE_PAGE
592 static const BYTE ExCvt[] = MKCVTBL(TBL_CT, FF_CODE_PAGE);
593
594 #else /* Static code page configuration (DBCS) */
595 #define CODEPAGE FF_CODE_PAGE
596 static const BYTE DbcTbl[] = MKCVTBL(TBL_DC, FF_CODE_PAGE);
597
598 #endif
599
600
601
602
603 /*--------------------------------------------------------------------------
604
605 Module Private Functions
606
607 ---------------------------------------------------------------------------*/
608
609
610 /*-----------------------------------------------------------------------*/
611 /* Load/Store multi-byte word in the FAT structure */
612 /*-----------------------------------------------------------------------*/
613
ld_word(const BYTE * ptr)614 static WORD ld_word (const BYTE* ptr) /* Load a 2-byte little-endian word */
615 {
616 WORD rv;
617
618 rv = ptr[1];
619 rv = rv << 8 | ptr[0];
620 return rv;
621 }
622
ld_dword(const BYTE * ptr)623 static DWORD ld_dword (const BYTE* ptr) /* Load a 4-byte little-endian word */
624 {
625 DWORD rv;
626
627 rv = ptr[3];
628 rv = rv << 8 | ptr[2];
629 rv = rv << 8 | ptr[1];
630 rv = rv << 8 | ptr[0];
631 return rv;
632 }
633
634 #if FF_FS_EXFAT
ld_qword(const BYTE * ptr)635 static QWORD ld_qword (const BYTE* ptr) /* Load an 8-byte little-endian word */
636 {
637 QWORD rv;
638
639 rv = ptr[7];
640 rv = rv << 8 | ptr[6];
641 rv = rv << 8 | ptr[5];
642 rv = rv << 8 | ptr[4];
643 rv = rv << 8 | ptr[3];
644 rv = rv << 8 | ptr[2];
645 rv = rv << 8 | ptr[1];
646 rv = rv << 8 | ptr[0];
647 return rv;
648 }
649 #endif
650
651 #if !FF_FS_READONLY
st_word(BYTE * ptr,WORD val)652 static void st_word (BYTE* ptr, WORD val) /* Store a 2-byte word in little-endian */
653 {
654 *ptr++ = (BYTE)val; val >>= 8;
655 *ptr++ = (BYTE)val;
656 }
657
st_dword(BYTE * ptr,DWORD val)658 static void st_dword (BYTE* ptr, DWORD val) /* Store a 4-byte word in little-endian */
659 {
660 *ptr++ = (BYTE)val; val >>= 8;
661 *ptr++ = (BYTE)val; val >>= 8;
662 *ptr++ = (BYTE)val; val >>= 8;
663 *ptr++ = (BYTE)val;
664 }
665
666 #if FF_FS_EXFAT
st_qword(BYTE * ptr,QWORD val)667 static void st_qword (BYTE* ptr, QWORD val) /* Store an 8-byte word in little-endian */
668 {
669 *ptr++ = (BYTE)val; val >>= 8;
670 *ptr++ = (BYTE)val; val >>= 8;
671 *ptr++ = (BYTE)val; val >>= 8;
672 *ptr++ = (BYTE)val; val >>= 8;
673 *ptr++ = (BYTE)val; val >>= 8;
674 *ptr++ = (BYTE)val; val >>= 8;
675 *ptr++ = (BYTE)val; val >>= 8;
676 *ptr++ = (BYTE)val;
677 }
678 #endif
679 #endif /* !FF_FS_READONLY */
680
681
682
683 /*-----------------------------------------------------------------------*/
684 /* String functions */
685 /*-----------------------------------------------------------------------*/
686
687 /* Test if the byte is DBC 1st byte */
dbc_1st(BYTE c)688 static int dbc_1st (BYTE c)
689 {
690 #if FF_CODE_PAGE == 0 /* Variable code page */
691 if (DbcTbl && c >= DbcTbl[0]) {
692 if (c <= DbcTbl[1]) return 1; /* 1st byte range 1 */
693 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1; /* 1st byte range 2 */
694 }
695 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
696 if (c >= DbcTbl[0]) {
697 if (c <= DbcTbl[1]) return 1;
698 if (c >= DbcTbl[2] && c <= DbcTbl[3]) return 1;
699 }
700 #else /* SBCS fixed code page */
701 if (c != 0) return 0; /* Always false */
702 #endif
703 return 0;
704 }
705
706
707 /* Test if the byte is DBC 2nd byte */
dbc_2nd(BYTE c)708 static int dbc_2nd (BYTE c)
709 {
710 #if FF_CODE_PAGE == 0 /* Variable code page */
711 if (DbcTbl && c >= DbcTbl[4]) {
712 if (c <= DbcTbl[5]) return 1; /* 2nd byte range 1 */
713 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1; /* 2nd byte range 2 */
714 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1; /* 2nd byte range 3 */
715 }
716 #elif FF_CODE_PAGE >= 900 /* DBCS fixed code page */
717 if (c >= DbcTbl[4]) {
718 if (c <= DbcTbl[5]) return 1;
719 if (c >= DbcTbl[6] && c <= DbcTbl[7]) return 1;
720 if (c >= DbcTbl[8] && c <= DbcTbl[9]) return 1;
721 }
722 #else /* SBCS fixed code page */
723 if (c != 0) return 0; /* Always false */
724 #endif
725 return 0;
726 }
727
728
729 #if FF_USE_LFN
730
731 /* Get a Unicode code point from the TCHAR string in defined API encodeing */
tchar2uni(const TCHAR ** str)732 static DWORD tchar2uni ( /* Returns a character in UTF-16 encoding (>=0x10000 on surrogate pair, 0xFFFFFFFF on decode error) */
733 const TCHAR** str /* Pointer to pointer to TCHAR string in configured encoding */
734 )
735 {
736 DWORD uc;
737 const TCHAR *p = *str;
738
739 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
740 WCHAR wc;
741
742 uc = *p++; /* Get a unit */
743 if (IsSurrogate(uc)) { /* Surrogate? */
744 wc = *p++; /* Get low surrogate */
745 if (!IsSurrogateH(uc) || !IsSurrogateL(wc)) return 0xFFFFFFFF; /* Wrong surrogate? */
746 uc = uc << 16 | wc;
747 }
748
749 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
750 BYTE b;
751 int nf;
752
753 uc = (BYTE)*p++; /* Get an encoding unit */
754 if (uc & 0x80) { /* Multiple byte code? */
755 if ((uc & 0xE0) == 0xC0) { /* 2-byte sequence? */
756 uc &= 0x1F; nf = 1;
757 } else if ((uc & 0xF0) == 0xE0) { /* 3-byte sequence? */
758 uc &= 0x0F; nf = 2;
759 } else if ((uc & 0xF8) == 0xF0) { /* 4-byte sequence? */
760 uc &= 0x07; nf = 3;
761 } else { /* Wrong sequence */
762 return 0xFFFFFFFF;
763 }
764 do { /* Get trailing bytes */
765 b = (BYTE)*p++;
766 if ((b & 0xC0) != 0x80) return 0xFFFFFFFF; /* Wrong sequence? */
767 uc = uc << 6 | (b & 0x3F);
768 } while (--nf != 0);
769 if (uc < 0x80 || IsSurrogate(uc) || uc >= 0x110000) return 0xFFFFFFFF; /* Wrong code? */
770 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
771 }
772
773 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
774 uc = (TCHAR)*p++; /* Get a unit */
775 if (uc >= 0x110000 || IsSurrogate(uc)) return 0xFFFFFFFF; /* Wrong code? */
776 if (uc >= 0x010000) uc = 0xD800DC00 | ((uc - 0x10000) << 6 & 0x3FF0000) | (uc & 0x3FF); /* Make a surrogate pair if needed */
777
778 #else /* ANSI/OEM input */
779 BYTE b;
780 WCHAR wc;
781
782 wc = (BYTE)*p++; /* Get a byte */
783 if (dbc_1st((BYTE)wc)) { /* Is it a DBC 1st byte? */
784 b = (BYTE)*p++; /* Get 2nd byte */
785 if (!dbc_2nd(b)) return 0xFFFFFFFF; /* Invalid code? */
786 wc = (wc << 8) + b; /* Make a DBC */
787 }
788 if (wc != 0) {
789 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM ==> Unicode */
790 if (wc == 0) return 0xFFFFFFFF; /* Invalid code? */
791 }
792 uc = wc;
793
794 #endif
795 *str = p; /* Next read pointer */
796 return uc;
797 }
798
799
800 /* Store a Unicode char in defined API encoding */
put_utf(DWORD chr,TCHAR * buf,UINT szb)801 static UINT put_utf ( /* Returns number of encoding units written (0:buffer overflow or wrong encoding) */
802 DWORD chr, /* UTF-16 encoded character (Surrogate pair if >=0x10000) */
803 TCHAR* buf, /* Output buffer */
804 UINT szb /* Size of the buffer */
805 )
806 {
807 #if FF_LFN_UNICODE == 1 /* UTF-16 output */
808 WCHAR hs, wc;
809
810 hs = (WCHAR)(chr >> 16);
811 wc = (WCHAR)chr;
812 if (hs == 0) { /* Single encoding unit? */
813 if (szb < 1 || IsSurrogate(wc)) return 0; /* Buffer overflow or wrong code? */
814 *buf = wc;
815 return 1;
816 }
817 if (szb < 2 || !IsSurrogateH(hs) || !IsSurrogateL(wc)) return 0; /* Buffer overflow or wrong surrogate? */
818 *buf++ = hs;
819 *buf++ = wc;
820 return 2;
821
822 #elif FF_LFN_UNICODE == 2 /* UTF-8 output */
823 DWORD hc;
824
825 if (chr < 0x80) { /* Single byte code? */
826 if (szb < 1) return 0; /* Buffer overflow? */
827 *buf = (TCHAR)chr;
828 return 1;
829 }
830 if (chr < 0x800) { /* 2-byte sequence? */
831 if (szb < 2) return 0; /* Buffer overflow? */
832 *buf++ = (TCHAR)(0xC0 | (chr >> 6 & 0x1F));
833 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
834 return 2;
835 }
836 if (chr < 0x10000) { /* 3-byte sequence? */
837 if (szb < 3 || IsSurrogate(chr)) return 0; /* Buffer overflow or wrong code? */
838 *buf++ = (TCHAR)(0xE0 | (chr >> 12 & 0x0F));
839 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
840 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
841 return 3;
842 }
843 /* 4-byte sequence */
844 if (szb < 4) return 0; /* Buffer overflow? */
845 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
846 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
847 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
848 chr = (hc | chr) + 0x10000;
849 *buf++ = (TCHAR)(0xF0 | (chr >> 18 & 0x07));
850 *buf++ = (TCHAR)(0x80 | (chr >> 12 & 0x3F));
851 *buf++ = (TCHAR)(0x80 | (chr >> 6 & 0x3F));
852 *buf++ = (TCHAR)(0x80 | (chr >> 0 & 0x3F));
853 return 4;
854
855 #elif FF_LFN_UNICODE == 3 /* UTF-32 output */
856 DWORD hc;
857
858 if (szb < 1) return 0; /* Buffer overflow? */
859 if (chr >= 0x10000) { /* Out of BMP? */
860 hc = ((chr & 0xFFFF0000) - 0xD8000000) >> 6; /* Get high 10 bits */
861 chr = (chr & 0xFFFF) - 0xDC00; /* Get low 10 bits */
862 if (hc >= 0x100000 || chr >= 0x400) return 0; /* Wrong surrogate? */
863 chr = (hc | chr) + 0x10000;
864 }
865 *buf++ = (TCHAR)chr;
866 return 1;
867
868 #else /* ANSI/OEM output */
869 WCHAR wc;
870
871 wc = ff_uni2oem(chr, CODEPAGE);
872 if (wc >= 0x100) { /* Is this a DBC? */
873 if (szb < 2) return 0;
874 *buf++ = (char)(wc >> 8); /* Store DBC 1st byte */
875 *buf++ = (TCHAR)wc; /* Store DBC 2nd byte */
876 return 2;
877 }
878 if (wc == 0 || szb < 1) return 0; /* Invalid char or buffer overflow? */
879 *buf++ = (TCHAR)wc; /* Store the character */
880 return 1;
881 #endif
882 }
883 #endif /* FF_USE_LFN */
884
885
886 #if FF_FS_REENTRANT
887 /*-----------------------------------------------------------------------*/
888 /* Request/Release grant to access the volume */
889 /*-----------------------------------------------------------------------*/
lock_fs(FATFS * fs)890 static int lock_fs ( /* 1:Ok, 0:timeout */
891 FATFS* fs /* Filesystem object */
892 )
893 {
894 return ff_req_grant(fs->sobj);
895 }
896
897
unlock_fs(FATFS * fs,FRESULT res)898 static void unlock_fs (
899 FATFS* fs, /* Filesystem object */
900 FRESULT res /* Result code to be returned */
901 )
902 {
903 if (fs && res != FR_NOT_ENABLED && res != FR_INVALID_DRIVE && res != FR_TIMEOUT) {
904 ff_rel_grant(fs->sobj);
905 }
906 }
907
908 #endif
909
910
911
912 #if FF_FS_LOCK != 0
913 /*-----------------------------------------------------------------------*/
914 /* File lock control functions */
915 /*-----------------------------------------------------------------------*/
916
chk_lock(DIR * dp,int acc)917 static FRESULT chk_lock ( /* Check if the file can be accessed */
918 DIR* dp, /* Directory object pointing the file to be checked */
919 int acc /* Desired access type (0:Read mode open, 1:Write mode open, 2:Delete or rename) */
920 )
921 {
922 UINT i, be;
923
924 /* Search open object table for the object */
925 be = 0;
926 for (i = 0; i < FF_FS_LOCK; i++) {
927 if (Files[i].fs) { /* Existing entry */
928 if (Files[i].fs == dp->obj.fs && /* Check if the object matches with an open object */
929 Files[i].clu == dp->obj.sclust &&
930 Files[i].ofs == dp->dptr) break;
931 } else { /* Blank entry */
932 be = 1;
933 }
934 }
935 if (i == FF_FS_LOCK) { /* The object has not been opened */
936 return (!be && acc != 2) ? FR_TOO_MANY_OPEN_FILES : FR_OK; /* Is there a blank entry for new object? */
937 }
938
939 /* The object was opened. Reject any open against writing file and all write mode open */
940 return (acc != 0 || Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
941 }
942
943
enq_lock(void)944 static int enq_lock (void) /* Check if an entry is available for a new object */
945 {
946 UINT i;
947
948 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
949 return (i == FF_FS_LOCK) ? 0 : 1;
950 }
951
952
inc_lock(DIR * dp,int acc)953 static UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
954 DIR* dp, /* Directory object pointing the file to register or increment */
955 int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
956 )
957 {
958 UINT i;
959
960
961 for (i = 0; i < FF_FS_LOCK; i++) { /* Find the object */
962 if (Files[i].fs == dp->obj.fs
963 && Files[i].clu == dp->obj.sclust
964 && Files[i].ofs == dp->dptr) break;
965 }
966
967 if (i == FF_FS_LOCK) { /* Not opened. Register it as new. */
968 for (i = 0; i < FF_FS_LOCK && Files[i].fs; i++) ;
969 if (i == FF_FS_LOCK) return 0; /* No free entry to register (int err) */
970 Files[i].fs = dp->obj.fs;
971 Files[i].clu = dp->obj.sclust;
972 Files[i].ofs = dp->dptr;
973 Files[i].ctr = 0;
974 }
975
976 if (acc >= 1 && Files[i].ctr) return 0; /* Access violation (int err) */
977
978 Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
979
980 return i + 1; /* Index number origin from 1 */
981 }
982
983
dec_lock(UINT i)984 static FRESULT dec_lock ( /* Decrement object open counter */
985 UINT i /* Semaphore index (1..) */
986 )
987 {
988 WORD n;
989 FRESULT res;
990
991
992 if (--i < FF_FS_LOCK) { /* Index number origin from 0 */
993 n = Files[i].ctr;
994 if (n == 0x100) n = 0; /* If write mode open, delete the entry */
995 if (n > 0) n--; /* Decrement read mode open count */
996 Files[i].ctr = n;
997 if (n == 0) Files[i].fs = 0; /* Delete the entry if open count gets zero */
998 res = FR_OK;
999 } else {
1000 res = FR_INT_ERR; /* Invalid index nunber */
1001 }
1002 return res;
1003 }
1004
1005
clear_lock(FATFS * fs)1006 static void clear_lock ( /* Clear lock entries of the volume */
1007 FATFS *fs
1008 )
1009 {
1010 UINT i;
1011
1012 for (i = 0; i < FF_FS_LOCK; i++) {
1013 if (Files[i].fs == fs) Files[i].fs = 0;
1014 }
1015 }
1016
1017 #endif /* FF_FS_LOCK != 0 */
1018
1019
1020
1021 /*-----------------------------------------------------------------------*/
1022 /* Move/Flush disk access window in the filesystem object */
1023 /*-----------------------------------------------------------------------*/
1024 #if !FF_FS_READONLY
sync_window(FATFS * fs)1025 static FRESULT sync_window ( /* Returns FR_OK or FR_DISK_ERR */
1026 FATFS* fs /* Filesystem object */
1027 )
1028 {
1029 FRESULT res = FR_OK;
1030
1031
1032 if (fs->wflag) { /* Is the disk access window dirty? */
1033 if (disk_write(fs->pdrv, fs->win, fs->winsect, 1) == RES_OK) { /* Write it back into the volume */
1034 fs->wflag = 0; /* Clear window dirty flag */
1035 if (fs->winsect - fs->fatbase < fs->fsize) { /* Is it in the 1st FAT? */
1036 if (fs->n_fats == 2) disk_write(fs->pdrv, fs->win, fs->winsect + fs->fsize, 1); /* Reflect it to 2nd FAT if needed */
1037 }
1038 } else {
1039 res = FR_DISK_ERR;
1040 }
1041 }
1042 return res;
1043 }
1044 #endif
1045
1046
move_window(FATFS * fs,LBA_t sect)1047 static FRESULT move_window ( /* Returns FR_OK or FR_DISK_ERR */
1048 FATFS* fs, /* Filesystem object */
1049 LBA_t sect /* Sector LBA to make appearance in the fs->win[] */
1050 )
1051 {
1052 FRESULT res = FR_OK;
1053
1054
1055 if (sect != fs->winsect) { /* Window offset changed? */
1056 #if !FF_FS_READONLY
1057 res = sync_window(fs); /* Flush the window */
1058 #endif
1059 if (res == FR_OK) { /* Fill sector window with new data */
1060 if (disk_read(fs->pdrv, fs->win, sect, 1) != RES_OK) {
1061 sect = (LBA_t)0 - 1; /* Invalidate window if read data is not valid */
1062 res = FR_DISK_ERR;
1063 }
1064 fs->winsect = sect;
1065 }
1066 }
1067 return res;
1068 }
1069
1070
1071
1072
1073 #if !FF_FS_READONLY
1074 /*-----------------------------------------------------------------------*/
1075 /* Synchronize filesystem and data on the storage */
1076 /*-----------------------------------------------------------------------*/
1077
sync_fs(FATFS * fs)1078 static FRESULT sync_fs ( /* Returns FR_OK or FR_DISK_ERR */
1079 FATFS* fs /* Filesystem object */
1080 )
1081 {
1082 FRESULT res;
1083
1084
1085 res = sync_window(fs);
1086 if (res == FR_OK) {
1087 if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) { /* FAT32: Update FSInfo sector if needed */
1088 /* Create FSInfo structure */
1089 memset(fs->win, 0, sizeof fs->win);
1090 st_word(fs->win + BS_55AA, 0xAA55); /* Boot signature */
1091 st_dword(fs->win + FSI_LeadSig, 0x41615252); /* Leading signature */
1092 st_dword(fs->win + FSI_StrucSig, 0x61417272); /* Structure signature */
1093 st_dword(fs->win + FSI_Free_Count, fs->free_clst); /* Number of free clusters */
1094 st_dword(fs->win + FSI_Nxt_Free, fs->last_clst); /* Last allocated culuster */
1095 fs->winsect = fs->volbase + 1; /* Write it into the FSInfo sector (Next to VBR) */
1096 disk_write(fs->pdrv, fs->win, fs->winsect, 1);
1097 fs->fsi_flag = 0;
1098 }
1099 /* Make sure that no pending write process in the lower layer */
1100 if (disk_ioctl(fs->pdrv, CTRL_SYNC, 0) != RES_OK) res = FR_DISK_ERR;
1101 }
1102
1103 return res;
1104 }
1105
1106 #endif
1107
1108
1109
1110 /*-----------------------------------------------------------------------*/
1111 /* Get physical sector number from cluster number */
1112 /*-----------------------------------------------------------------------*/
1113
clst2sect(FATFS * fs,DWORD clst)1114 static LBA_t clst2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
1115 FATFS* fs, /* Filesystem object */
1116 DWORD clst /* Cluster# to be converted */
1117 )
1118 {
1119 clst -= 2; /* Cluster number is origin from 2 */
1120 if (clst >= fs->n_fatent - 2) return 0; /* Is it invalid cluster number? */
1121 return fs->database + (LBA_t)fs->csize * clst; /* Start sector number of the cluster */
1122 }
1123
1124
1125
1126
1127 /*-----------------------------------------------------------------------*/
1128 /* FAT access - Read value of an FAT entry */
1129 /*-----------------------------------------------------------------------*/
1130
get_fat(FFOBJID * obj,DWORD clst)1131 static DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x7FFFFFFF:Cluster status */
1132 FFOBJID* obj, /* Corresponding object */
1133 DWORD clst /* Cluster number to get the value */
1134 )
1135 {
1136 UINT wc, bc;
1137 DWORD val;
1138 FATFS *fs = obj->fs;
1139
1140
1141 if (clst < 2 || clst >= fs->n_fatent) { /* Check if in valid range */
1142 val = 1; /* Internal error */
1143
1144 } else {
1145 val = 0xFFFFFFFF; /* Default value falls on disk error */
1146
1147 switch (fs->fs_type) {
1148 case FS_FAT12 :
1149 bc = (UINT)clst; bc += bc / 2;
1150 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1151 wc = fs->win[bc++ % SS(fs)]; /* Get 1st byte of the entry */
1152 if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
1153 wc |= fs->win[bc % SS(fs)] << 8; /* Merge 2nd byte of the entry */
1154 val = (clst & 1) ? (wc >> 4) : (wc & 0xFFF); /* Adjust bit position */
1155 break;
1156
1157 case FS_FAT16 :
1158 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
1159 val = ld_word(fs->win + clst * 2 % SS(fs)); /* Simple WORD array */
1160 break;
1161
1162 case FS_FAT32 :
1163 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1164 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x0FFFFFFF; /* Simple DWORD array but mask out upper 4 bits */
1165 break;
1166 #if FF_FS_EXFAT
1167 case FS_EXFAT :
1168 if ((obj->objsize != 0 && obj->sclust != 0) || obj->stat == 0) { /* Object except root dir must have valid data length */
1169 DWORD cofs = clst - obj->sclust; /* Offset from start cluster */
1170 DWORD clen = (DWORD)((LBA_t)((obj->objsize - 1) / SS(fs)) / fs->csize); /* Number of clusters - 1 */
1171
1172 if (obj->stat == 2 && cofs <= clen) { /* Is it a contiguous chain? */
1173 val = (cofs == clen) ? 0x7FFFFFFF : clst + 1; /* No data on the FAT, generate the value */
1174 break;
1175 }
1176 if (obj->stat == 3 && cofs < obj->n_cont) { /* Is it in the 1st fragment? */
1177 val = clst + 1; /* Generate the value */
1178 break;
1179 }
1180 if (obj->stat != 2) { /* Get value from FAT if FAT chain is valid */
1181 if (obj->n_frag != 0) { /* Is it on the growing edge? */
1182 val = 0x7FFFFFFF; /* Generate EOC */
1183 } else {
1184 if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
1185 val = ld_dword(fs->win + clst * 4 % SS(fs)) & 0x7FFFFFFF;
1186 }
1187 break;
1188 }
1189 }
1190 val = 1; /* Internal error */
1191 break;
1192 #endif
1193 default:
1194 val = 1; /* Internal error */
1195 }
1196 }
1197
1198 return val;
1199 }
1200
1201
1202
1203
1204 #if !FF_FS_READONLY
1205 /*-----------------------------------------------------------------------*/
1206 /* FAT access - Change value of an FAT entry */
1207 /*-----------------------------------------------------------------------*/
1208
put_fat(FATFS * fs,DWORD clst,DWORD val)1209 static FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
1210 FATFS* fs, /* Corresponding filesystem object */
1211 DWORD clst, /* FAT index number (cluster number) to be changed */
1212 DWORD val /* New value to be set to the entry */
1213 )
1214 {
1215 UINT bc;
1216 BYTE *p;
1217 FRESULT res = FR_INT_ERR;
1218
1219
1220 if (clst >= 2 && clst < fs->n_fatent) { /* Check if in valid range */
1221 switch (fs->fs_type) {
1222 case FS_FAT12:
1223 bc = (UINT)clst; bc += bc / 2; /* bc: byte offset of the entry */
1224 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1225 if (res != FR_OK) break;
1226 p = fs->win + bc++ % SS(fs);
1227 *p = (clst & 1) ? ((*p & 0x0F) | ((BYTE)val << 4)) : (BYTE)val; /* Update 1st byte */
1228 fs->wflag = 1;
1229 res = move_window(fs, fs->fatbase + (bc / SS(fs)));
1230 if (res != FR_OK) break;
1231 p = fs->win + bc % SS(fs);
1232 *p = (clst & 1) ? (BYTE)(val >> 4) : ((*p & 0xF0) | ((BYTE)(val >> 8) & 0x0F)); /* Update 2nd byte */
1233 fs->wflag = 1;
1234 break;
1235
1236 case FS_FAT16:
1237 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
1238 if (res != FR_OK) break;
1239 st_word(fs->win + clst * 2 % SS(fs), (WORD)val); /* Simple WORD array */
1240 fs->wflag = 1;
1241 break;
1242
1243 case FS_FAT32:
1244 #if FF_FS_EXFAT
1245 case FS_EXFAT:
1246 #endif
1247 res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
1248 if (res != FR_OK) break;
1249 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1250 val = (val & 0x0FFFFFFF) | (ld_dword(fs->win + clst * 4 % SS(fs)) & 0xF0000000);
1251 }
1252 st_dword(fs->win + clst * 4 % SS(fs), val);
1253 fs->wflag = 1;
1254 break;
1255 }
1256 }
1257 return res;
1258 }
1259
1260 #endif /* !FF_FS_READONLY */
1261
1262
1263
1264
1265 #if FF_FS_EXFAT && !FF_FS_READONLY
1266 /*-----------------------------------------------------------------------*/
1267 /* exFAT: Accessing FAT and Allocation Bitmap */
1268 /*-----------------------------------------------------------------------*/
1269
1270 /*--------------------------------------*/
1271 /* Find a contiguous free cluster block */
1272 /*--------------------------------------*/
1273
find_bitmap(FATFS * fs,DWORD clst,DWORD ncl)1274 static DWORD find_bitmap ( /* 0:Not found, 2..:Cluster block found, 0xFFFFFFFF:Disk error */
1275 FATFS* fs, /* Filesystem object */
1276 DWORD clst, /* Cluster number to scan from */
1277 DWORD ncl /* Number of contiguous clusters to find (1..) */
1278 )
1279 {
1280 BYTE bm, bv;
1281 UINT i;
1282 DWORD val, scl, ctr;
1283
1284
1285 clst -= 2; /* The first bit in the bitmap corresponds to cluster #2 */
1286 if (clst >= fs->n_fatent - 2) clst = 0;
1287 scl = val = clst; ctr = 0;
1288 for (;;) {
1289 if (move_window(fs, fs->bitbase + val / 8 / SS(fs)) != FR_OK) return 0xFFFFFFFF;
1290 i = val / 8 % SS(fs); bm = 1 << (val % 8);
1291 do {
1292 do {
1293 bv = fs->win[i] & bm; bm <<= 1; /* Get bit value */
1294 if (++val >= fs->n_fatent - 2) { /* Next cluster (with wrap-around) */
1295 val = 0; bm = 0; i = SS(fs);
1296 }
1297 if (bv == 0) { /* Is it a free cluster? */
1298 if (++ctr == ncl) return scl + 2; /* Check if run length is sufficient for required */
1299 } else {
1300 scl = val; ctr = 0; /* Encountered a cluster in-use, restart to scan */
1301 }
1302 if (val == clst) return 0; /* All cluster scanned? */
1303 } while (bm != 0);
1304 bm = 1;
1305 } while (++i < SS(fs));
1306 }
1307 }
1308
1309
1310 /*----------------------------------------*/
1311 /* Set/Clear a block of allocation bitmap */
1312 /*----------------------------------------*/
1313
change_bitmap(FATFS * fs,DWORD clst,DWORD ncl,int bv)1314 static FRESULT change_bitmap (
1315 FATFS* fs, /* Filesystem object */
1316 DWORD clst, /* Cluster number to change from */
1317 DWORD ncl, /* Number of clusters to be changed */
1318 int bv /* bit value to be set (0 or 1) */
1319 )
1320 {
1321 BYTE bm;
1322 UINT i;
1323 LBA_t sect;
1324
1325
1326 clst -= 2; /* The first bit corresponds to cluster #2 */
1327 sect = fs->bitbase + clst / 8 / SS(fs); /* Sector address */
1328 i = clst / 8 % SS(fs); /* Byte offset in the sector */
1329 bm = 1 << (clst % 8); /* Bit mask in the byte */
1330 for (;;) {
1331 if (move_window(fs, sect++) != FR_OK) return FR_DISK_ERR;
1332 do {
1333 do {
1334 if (bv == (int)((fs->win[i] & bm) != 0)) return FR_INT_ERR; /* Is the bit expected value? */
1335 fs->win[i] ^= bm; /* Flip the bit */
1336 fs->wflag = 1;
1337 if (--ncl == 0) return FR_OK; /* All bits processed? */
1338 } while (bm <<= 1); /* Next bit */
1339 bm = 1;
1340 } while (++i < SS(fs)); /* Next byte */
1341 i = 0;
1342 }
1343 }
1344
1345
1346 /*---------------------------------------------*/
1347 /* Fill the first fragment of the FAT chain */
1348 /*---------------------------------------------*/
1349
fill_first_frag(FFOBJID * obj)1350 static FRESULT fill_first_frag (
1351 FFOBJID* obj /* Pointer to the corresponding object */
1352 )
1353 {
1354 FRESULT res;
1355 DWORD cl, n;
1356
1357
1358 if (obj->stat == 3) { /* Has the object been changed 'fragmented' in this session? */
1359 for (cl = obj->sclust, n = obj->n_cont; n; cl++, n--) { /* Create cluster chain on the FAT */
1360 res = put_fat(obj->fs, cl, cl + 1);
1361 if (res != FR_OK) return res;
1362 }
1363 obj->stat = 0; /* Change status 'FAT chain is valid' */
1364 }
1365 return FR_OK;
1366 }
1367
1368
1369 /*---------------------------------------------*/
1370 /* Fill the last fragment of the FAT chain */
1371 /*---------------------------------------------*/
1372
fill_last_frag(FFOBJID * obj,DWORD lcl,DWORD term)1373 static FRESULT fill_last_frag (
1374 FFOBJID* obj, /* Pointer to the corresponding object */
1375 DWORD lcl, /* Last cluster of the fragment */
1376 DWORD term /* Value to set the last FAT entry */
1377 )
1378 {
1379 FRESULT res;
1380
1381
1382 while (obj->n_frag > 0) { /* Create the chain of last fragment */
1383 res = put_fat(obj->fs, lcl - obj->n_frag + 1, (obj->n_frag > 1) ? lcl - obj->n_frag + 2 : term);
1384 if (res != FR_OK) return res;
1385 obj->n_frag--;
1386 }
1387 return FR_OK;
1388 }
1389
1390 #endif /* FF_FS_EXFAT && !FF_FS_READONLY */
1391
1392
1393
1394 #if !FF_FS_READONLY
1395 /*-----------------------------------------------------------------------*/
1396 /* FAT handling - Remove a cluster chain */
1397 /*-----------------------------------------------------------------------*/
1398
remove_chain(FFOBJID * obj,DWORD clst,DWORD pclst)1399 static FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
1400 FFOBJID* obj, /* Corresponding object */
1401 DWORD clst, /* Cluster to remove a chain from */
1402 DWORD pclst /* Previous cluster of clst (0 if entire chain) */
1403 )
1404 {
1405 FRESULT res = FR_OK;
1406 DWORD nxt;
1407 FATFS *fs = obj->fs;
1408 #if FF_FS_EXFAT || FF_USE_TRIM
1409 DWORD scl = clst, ecl = clst;
1410 #endif
1411 #if FF_USE_TRIM
1412 LBA_t rt[2];
1413 #endif
1414
1415 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Check if in valid range */
1416
1417 /* Mark the previous cluster 'EOC' on the FAT if it exists */
1418 if (pclst != 0 && (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT || obj->stat != 2)) {
1419 res = put_fat(fs, pclst, 0xFFFFFFFF);
1420 if (res != FR_OK) return res;
1421 }
1422
1423 /* Remove the chain */
1424 do {
1425 nxt = get_fat(obj, clst); /* Get cluster status */
1426 if (nxt == 0) break; /* Empty cluster? */
1427 if (nxt == 1) return FR_INT_ERR; /* Internal error? */
1428 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error? */
1429 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) {
1430 res = put_fat(fs, clst, 0); /* Mark the cluster 'free' on the FAT */
1431 if (res != FR_OK) return res;
1432 }
1433 if (fs->free_clst < fs->n_fatent - 2) { /* Update FSINFO */
1434 fs->free_clst++;
1435 fs->fsi_flag |= 1;
1436 }
1437 #if FF_FS_EXFAT || FF_USE_TRIM
1438 if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
1439 ecl = nxt;
1440 } else { /* End of contiguous cluster block */
1441 #if FF_FS_EXFAT
1442 if (fs->fs_type == FS_EXFAT) {
1443 res = change_bitmap(fs, scl, ecl - scl + 1, 0); /* Mark the cluster block 'free' on the bitmap */
1444 if (res != FR_OK) return res;
1445 }
1446 #endif
1447 #if FF_USE_TRIM
1448 rt[0] = clst2sect(fs, scl); /* Start of data area to be freed */
1449 rt[1] = clst2sect(fs, ecl) + fs->csize - 1; /* End of data area to be freed */
1450 disk_ioctl(fs->pdrv, CTRL_TRIM, rt); /* Inform storage device that the data in the block may be erased */
1451 #endif
1452 scl = ecl = nxt;
1453 }
1454 #endif
1455 clst = nxt; /* Next cluster */
1456 } while (clst < fs->n_fatent); /* Repeat while not the last link */
1457
1458 #if FF_FS_EXFAT
1459 /* Some post processes for chain status */
1460 if (fs->fs_type == FS_EXFAT) {
1461 if (pclst == 0) { /* Has the entire chain been removed? */
1462 obj->stat = 0; /* Change the chain status 'initial' */
1463 } else {
1464 if (obj->stat == 0) { /* Is it a fragmented chain from the beginning of this session? */
1465 clst = obj->sclust; /* Follow the chain to check if it gets contiguous */
1466 while (clst != pclst) {
1467 nxt = get_fat(obj, clst);
1468 if (nxt < 2) return FR_INT_ERR;
1469 if (nxt == 0xFFFFFFFF) return FR_DISK_ERR;
1470 if (nxt != clst + 1) break; /* Not contiguous? */
1471 clst++;
1472 }
1473 if (clst == pclst) { /* Has the chain got contiguous again? */
1474 obj->stat = 2; /* Change the chain status 'contiguous' */
1475 }
1476 } else {
1477 if (obj->stat == 3 && pclst >= obj->sclust && pclst <= obj->sclust + obj->n_cont) { /* Was the chain fragmented in this session and got contiguous again? */
1478 obj->stat = 2; /* Change the chain status 'contiguous' */
1479 }
1480 }
1481 }
1482 }
1483 #endif
1484 return FR_OK;
1485 }
1486
1487
1488
1489
1490 /*-----------------------------------------------------------------------*/
1491 /* FAT handling - Stretch a chain or Create a new chain */
1492 /*-----------------------------------------------------------------------*/
1493
create_chain(FFOBJID * obj,DWORD clst)1494 static DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
1495 FFOBJID* obj, /* Corresponding object */
1496 DWORD clst /* Cluster# to stretch, 0:Create a new chain */
1497 )
1498 {
1499 DWORD cs, ncl, scl;
1500 FRESULT res;
1501 FATFS *fs = obj->fs;
1502
1503
1504 if (clst == 0) { /* Create a new chain */
1505 scl = fs->last_clst; /* Suggested cluster to start to find */
1506 if (scl == 0 || scl >= fs->n_fatent) scl = 1;
1507 }
1508 else { /* Stretch a chain */
1509 cs = get_fat(obj, clst); /* Check the cluster status */
1510 if (cs < 2) return 1; /* Test for insanity */
1511 if (cs == 0xFFFFFFFF) return cs; /* Test for disk error */
1512 if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
1513 scl = clst; /* Cluster to start to find */
1514 }
1515 if (fs->free_clst == 0) return 0; /* No free cluster */
1516
1517 #if FF_FS_EXFAT
1518 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
1519 ncl = find_bitmap(fs, scl, 1); /* Find a free cluster */
1520 if (ncl == 0 || ncl == 0xFFFFFFFF) return ncl; /* No free cluster or hard error? */
1521 res = change_bitmap(fs, ncl, 1, 1); /* Mark the cluster 'in use' */
1522 if (res == FR_INT_ERR) return 1;
1523 if (res == FR_DISK_ERR) return 0xFFFFFFFF;
1524 if (clst == 0) { /* Is it a new chain? */
1525 obj->stat = 2; /* Set status 'contiguous' */
1526 } else { /* It is a stretched chain */
1527 if (obj->stat == 2 && ncl != scl + 1) { /* Is the chain got fragmented? */
1528 obj->n_cont = scl - obj->sclust; /* Set size of the contiguous part */
1529 obj->stat = 3; /* Change status 'just fragmented' */
1530 }
1531 }
1532 if (obj->stat != 2) { /* Is the file non-contiguous? */
1533 if (ncl == clst + 1) { /* Is the cluster next to previous one? */
1534 obj->n_frag = obj->n_frag ? obj->n_frag + 1 : 2; /* Increment size of last framgent */
1535 } else { /* New fragment */
1536 if (obj->n_frag == 0) obj->n_frag = 1;
1537 res = fill_last_frag(obj, clst, ncl); /* Fill last fragment on the FAT and link it to new one */
1538 if (res == FR_OK) obj->n_frag = 1;
1539 }
1540 }
1541 } else
1542 #endif
1543 { /* On the FAT/FAT32 volume */
1544 ncl = 0;
1545 if (scl == clst) { /* Stretching an existing chain? */
1546 ncl = scl + 1; /* Test if next cluster is free */
1547 if (ncl >= fs->n_fatent) ncl = 2;
1548 cs = get_fat(obj, ncl); /* Get next cluster status */
1549 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1550 if (cs != 0) { /* Not free? */
1551 cs = fs->last_clst; /* Start at suggested cluster if it is valid */
1552 if (cs >= 2 && cs < fs->n_fatent) scl = cs;
1553 ncl = 0;
1554 }
1555 }
1556 if (ncl == 0) { /* The new cluster cannot be contiguous and find another fragment */
1557 ncl = scl; /* Start cluster */
1558 for (;;) {
1559 ncl++; /* Next cluster */
1560 if (ncl >= fs->n_fatent) { /* Check wrap-around */
1561 ncl = 2;
1562 if (ncl > scl) return 0; /* No free cluster found? */
1563 }
1564 cs = get_fat(obj, ncl); /* Get the cluster status */
1565 if (cs == 0) break; /* Found a free cluster? */
1566 if (cs == 1 || cs == 0xFFFFFFFF) return cs; /* Test for error */
1567 if (ncl == scl) return 0; /* No free cluster found? */
1568 }
1569 }
1570 res = put_fat(fs, ncl, 0xFFFFFFFF); /* Mark the new cluster 'EOC' */
1571 if (res == FR_OK && clst != 0) {
1572 res = put_fat(fs, clst, ncl); /* Link it from the previous one if needed */
1573 }
1574 }
1575
1576 if (res == FR_OK) { /* Update FSINFO if function succeeded. */
1577 fs->last_clst = ncl;
1578 if (fs->free_clst <= fs->n_fatent - 2) fs->free_clst--;
1579 fs->fsi_flag |= 1;
1580 } else {
1581 ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1; /* Failed. Generate error status */
1582 }
1583
1584 return ncl; /* Return new cluster number or error status */
1585 }
1586
1587 #endif /* !FF_FS_READONLY */
1588
1589
1590
1591
1592 #if FF_USE_FASTSEEK
1593 /*-----------------------------------------------------------------------*/
1594 /* FAT handling - Convert offset into cluster with link map table */
1595 /*-----------------------------------------------------------------------*/
1596
clmt_clust(FIL * fp,FSIZE_t ofs)1597 static DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
1598 FIL* fp, /* Pointer to the file object */
1599 FSIZE_t ofs /* File offset to be converted to cluster# */
1600 )
1601 {
1602 DWORD cl, ncl, *tbl;
1603 FATFS *fs = fp->obj.fs;
1604
1605
1606 tbl = fp->cltbl + 1; /* Top of CLMT */
1607 cl = (DWORD)(ofs / SS(fs) / fs->csize); /* Cluster order from top of the file */
1608 for (;;) {
1609 ncl = *tbl++; /* Number of cluters in the fragment */
1610 if (ncl == 0) return 0; /* End of table? (error) */
1611 if (cl < ncl) break; /* In this fragment? */
1612 cl -= ncl; tbl++; /* Next fragment */
1613 }
1614 return cl + *tbl; /* Return the cluster number */
1615 }
1616
1617 #endif /* FF_USE_FASTSEEK */
1618
1619
1620
1621
1622 /*-----------------------------------------------------------------------*/
1623 /* Directory handling - Fill a cluster with zeros */
1624 /*-----------------------------------------------------------------------*/
1625
1626 #if !FF_FS_READONLY
dir_clear(FATFS * fs,DWORD clst)1627 static FRESULT dir_clear ( /* Returns FR_OK or FR_DISK_ERR */
1628 FATFS *fs, /* Filesystem object */
1629 DWORD clst /* Directory table to clear */
1630 )
1631 {
1632 LBA_t sect;
1633 UINT n, szb;
1634 BYTE *ibuf;
1635
1636
1637 if (sync_window(fs) != FR_OK) return FR_DISK_ERR; /* Flush disk access window */
1638 sect = clst2sect(fs, clst); /* Top of the cluster */
1639 fs->winsect = sect; /* Set window to top of the cluster */
1640 memset(fs->win, 0, sizeof fs->win); /* Clear window buffer */
1641 #if FF_USE_LFN == 3 /* Quick table clear by using multi-secter write */
1642 /* Allocate a temporary buffer */
1643 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) ;
1644 if (szb > SS(fs)) { /* Buffer allocated? */
1645 memset(ibuf, 0, szb);
1646 szb /= SS(fs); /* Bytes -> Sectors */
1647 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1648 ff_memfree(ibuf);
1649 } else
1650 #endif
1651 {
1652 ibuf = fs->win; szb = 1; /* Use window buffer (many single-sector writes may take a time) */
1653 for (n = 0; n < fs->csize && disk_write(fs->pdrv, ibuf, sect + n, szb) == RES_OK; n += szb) ; /* Fill the cluster with 0 */
1654 }
1655 return (n == fs->csize) ? FR_OK : FR_DISK_ERR;
1656 }
1657 #endif /* !FF_FS_READONLY */
1658
1659
1660
1661
1662 /*-----------------------------------------------------------------------*/
1663 /* Directory handling - Set directory index */
1664 /*-----------------------------------------------------------------------*/
1665
dir_sdi(DIR * dp,DWORD ofs)1666 static FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
1667 DIR* dp, /* Pointer to directory object */
1668 DWORD ofs /* Offset of directory table */
1669 )
1670 {
1671 DWORD csz, clst;
1672 FATFS *fs = dp->obj.fs;
1673
1674
1675 if (ofs >= (DWORD)((FF_FS_EXFAT && fs->fs_type == FS_EXFAT) ? MAX_DIR_EX : MAX_DIR) || ofs % SZDIRE) { /* Check range of offset and alignment */
1676 return FR_INT_ERR;
1677 }
1678 dp->dptr = ofs; /* Set current offset */
1679 clst = dp->obj.sclust; /* Table start cluster (0:root) */
1680 if (clst == 0 && fs->fs_type >= FS_FAT32) { /* Replace cluster# 0 with root cluster# */
1681 clst = (DWORD)fs->dirbase;
1682 if (FF_FS_EXFAT) dp->obj.stat = 0; /* exFAT: Root dir has an FAT chain */
1683 }
1684
1685 if (clst == 0) { /* Static table (root-directory on the FAT volume) */
1686 if (ofs / SZDIRE >= fs->n_rootdir) return FR_INT_ERR; /* Is index out of range? */
1687 dp->sect = fs->dirbase;
1688
1689 } else { /* Dynamic table (sub-directory or root-directory on the FAT32/exFAT volume) */
1690 csz = (DWORD)fs->csize * SS(fs); /* Bytes per cluster */
1691 while (ofs >= csz) { /* Follow cluster chain */
1692 clst = get_fat(&dp->obj, clst); /* Get next cluster */
1693 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1694 if (clst < 2 || clst >= fs->n_fatent) return FR_INT_ERR; /* Reached to end of table or internal error */
1695 ofs -= csz;
1696 }
1697 dp->sect = clst2sect(fs, clst);
1698 }
1699 dp->clust = clst; /* Current cluster# */
1700 if (dp->sect == 0) return FR_INT_ERR;
1701 dp->sect += ofs / SS(fs); /* Sector# of the directory entry */
1702 dp->dir = fs->win + (ofs % SS(fs)); /* Pointer to the entry in the win[] */
1703
1704 return FR_OK;
1705 }
1706
1707
1708
1709
1710 /*-----------------------------------------------------------------------*/
1711 /* Directory handling - Move directory table index next */
1712 /*-----------------------------------------------------------------------*/
1713
dir_next(DIR * dp,int stretch)1714 static FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
1715 DIR* dp, /* Pointer to the directory object */
1716 int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
1717 )
1718 {
1719 DWORD ofs, clst;
1720 FATFS *fs = dp->obj.fs;
1721
1722
1723 ofs = dp->dptr + SZDIRE; /* Next entry */
1724 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 */
1725 if (dp->sect == 0) return FR_NO_FILE; /* Report EOT if it has been disabled */
1726
1727 if (ofs % SS(fs) == 0) { /* Sector changed? */
1728 dp->sect++; /* Next sector */
1729
1730 if (dp->clust == 0) { /* Static table */
1731 if (ofs / SZDIRE >= fs->n_rootdir) { /* Report EOT if it reached end of static table */
1732 dp->sect = 0; return FR_NO_FILE;
1733 }
1734 }
1735 else { /* Dynamic table */
1736 if ((ofs / SS(fs) & (fs->csize - 1)) == 0) { /* Cluster changed? */
1737 clst = get_fat(&dp->obj, dp->clust); /* Get next cluster */
1738 if (clst <= 1) return FR_INT_ERR; /* Internal error */
1739 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1740 if (clst >= fs->n_fatent) { /* It reached end of dynamic table */
1741 #if !FF_FS_READONLY
1742 if (!stretch) { /* If no stretch, report EOT */
1743 dp->sect = 0; return FR_NO_FILE;
1744 }
1745 clst = create_chain(&dp->obj, dp->clust); /* Allocate a cluster */
1746 if (clst == 0) return FR_DENIED; /* No free cluster */
1747 if (clst == 1) return FR_INT_ERR; /* Internal error */
1748 if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
1749 if (dir_clear(fs, clst) != FR_OK) return FR_DISK_ERR; /* Clean up the stretched table */
1750 if (FF_FS_EXFAT) dp->obj.stat |= 4; /* exFAT: The directory has been stretched */
1751 #else
1752 if (!stretch) dp->sect = 0; /* (this line is to suppress compiler warning) */
1753 dp->sect = 0; return FR_NO_FILE; /* Report EOT */
1754 #endif
1755 }
1756 dp->clust = clst; /* Initialize data for new cluster */
1757 dp->sect = clst2sect(fs, clst);
1758 }
1759 }
1760 }
1761 dp->dptr = ofs; /* Current entry */
1762 dp->dir = fs->win + ofs % SS(fs); /* Pointer to the entry in the win[] */
1763
1764 return FR_OK;
1765 }
1766
1767
1768
1769
1770 #if !FF_FS_READONLY
1771 /*-----------------------------------------------------------------------*/
1772 /* Directory handling - Reserve a block of directory entries */
1773 /*-----------------------------------------------------------------------*/
1774
dir_alloc(DIR * dp,UINT n_ent)1775 static FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
1776 DIR* dp, /* Pointer to the directory object */
1777 UINT n_ent /* Number of contiguous entries to allocate */
1778 )
1779 {
1780 FRESULT res;
1781 UINT n;
1782 FATFS *fs = dp->obj.fs;
1783
1784
1785 res = dir_sdi(dp, 0);
1786 if (res == FR_OK) {
1787 n = 0;
1788 do {
1789 res = move_window(fs, dp->sect);
1790 if (res != FR_OK) break;
1791 #if FF_FS_EXFAT
1792 if ((fs->fs_type == FS_EXFAT) ? (int)((dp->dir[XDIR_Type] & 0x80) == 0) : (int)(dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0)) { /* Is the entry free? */
1793 #else
1794 if (dp->dir[DIR_Name] == DDEM || dp->dir[DIR_Name] == 0) { /* Is the entry free? */
1795 #endif
1796 if (++n == n_ent) break; /* Is a block of contiguous free entries found? */
1797 } else {
1798 n = 0; /* Not a free entry, restart to search */
1799 }
1800 res = dir_next(dp, 1); /* Next entry with table stretch enabled */
1801 } while (res == FR_OK);
1802 }
1803
1804 if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
1805 return res;
1806 }
1807
1808 #endif /* !FF_FS_READONLY */
1809
1810
1811
1812
1813 /*-----------------------------------------------------------------------*/
1814 /* FAT: Directory handling - Load/Store start cluster number */
1815 /*-----------------------------------------------------------------------*/
1816
1817 static DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
1818 FATFS* fs, /* Pointer to the fs object */
1819 const BYTE* dir /* Pointer to the key entry */
1820 )
1821 {
1822 DWORD cl;
1823
1824 cl = ld_word(dir + DIR_FstClusLO);
1825 if (fs->fs_type == FS_FAT32) {
1826 cl |= (DWORD)ld_word(dir + DIR_FstClusHI) << 16;
1827 }
1828
1829 return cl;
1830 }
1831
1832
1833 #if !FF_FS_READONLY
1834 static void st_clust (
1835 FATFS* fs, /* Pointer to the fs object */
1836 BYTE* dir, /* Pointer to the key entry */
1837 DWORD cl /* Value to be set */
1838 )
1839 {
1840 st_word(dir + DIR_FstClusLO, (WORD)cl);
1841 if (fs->fs_type == FS_FAT32) {
1842 st_word(dir + DIR_FstClusHI, (WORD)(cl >> 16));
1843 }
1844 }
1845 #endif
1846
1847
1848
1849 #if FF_USE_LFN
1850 /*--------------------------------------------------------*/
1851 /* FAT-LFN: Compare a part of file name with an LFN entry */
1852 /*--------------------------------------------------------*/
1853
1854 static int cmp_lfn ( /* 1:matched, 0:not matched */
1855 const WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
1856 BYTE* dir /* Pointer to the directory entry containing the part of LFN */
1857 )
1858 {
1859 UINT i, s;
1860 WCHAR wc, uc;
1861
1862
1863 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
1864
1865 i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
1866
1867 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1868 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1869 if (wc != 0) {
1870 if (i >= FF_MAX_LFN + 1 || ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) { /* Compare it */
1871 return 0; /* Not matched */
1872 }
1873 wc = uc;
1874 } else {
1875 if (uc != 0xFFFF) return 0; /* Check filler */
1876 }
1877 }
1878
1879 if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) return 0; /* Last segment matched but different length */
1880
1881 return 1; /* The part of LFN matched */
1882 }
1883
1884
1885 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
1886 /*-----------------------------------------------------*/
1887 /* FAT-LFN: Pick a part of file name from an LFN entry */
1888 /*-----------------------------------------------------*/
1889
1890 static int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
1891 WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
1892 BYTE* dir /* Pointer to the LFN entry */
1893 )
1894 {
1895 UINT i, s;
1896 WCHAR wc, uc;
1897
1898
1899 if (ld_word(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO is 0 */
1900
1901 i = ((dir[LDIR_Ord] & ~LLEF) - 1) * 13; /* Offset in the LFN buffer */
1902
1903 for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
1904 uc = ld_word(dir + LfnOfs[s]); /* Pick an LFN character */
1905 if (wc != 0) {
1906 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1907 lfnbuf[i++] = wc = uc; /* Store it */
1908 } else {
1909 if (uc != 0xFFFF) return 0; /* Check filler */
1910 }
1911 }
1912
1913 if (dir[LDIR_Ord] & LLEF && wc != 0) { /* Put terminator if it is the last LFN part and not terminated */
1914 if (i >= FF_MAX_LFN + 1) return 0; /* Buffer overflow? */
1915 lfnbuf[i] = 0;
1916 }
1917
1918 return 1; /* The part of LFN is valid */
1919 }
1920 #endif
1921
1922
1923 #if !FF_FS_READONLY
1924 /*-----------------------------------------*/
1925 /* FAT-LFN: Create an entry of LFN entries */
1926 /*-----------------------------------------*/
1927
1928 static void put_lfn (
1929 const WCHAR* lfn, /* Pointer to the LFN */
1930 BYTE* dir, /* Pointer to the LFN entry to be created */
1931 BYTE ord, /* LFN order (1-20) */
1932 BYTE sum /* Checksum of the corresponding SFN */
1933 )
1934 {
1935 UINT i, s;
1936 WCHAR wc;
1937
1938
1939 dir[LDIR_Chksum] = sum; /* Set checksum */
1940 dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
1941 dir[LDIR_Type] = 0;
1942 st_word(dir + LDIR_FstClusLO, 0);
1943
1944 i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
1945 s = wc = 0;
1946 do {
1947 if (wc != 0xFFFF) wc = lfn[i++]; /* Get an effective character */
1948 st_word(dir + LfnOfs[s], wc); /* Put it */
1949 if (wc == 0) wc = 0xFFFF; /* Padding characters for following items */
1950 } while (++s < 13);
1951 if (wc == 0xFFFF || !lfn[i]) ord |= LLEF; /* Last LFN part is the start of LFN sequence */
1952 dir[LDIR_Ord] = ord; /* Set the LFN order */
1953 }
1954
1955 #endif /* !FF_FS_READONLY */
1956 #endif /* FF_USE_LFN */
1957
1958
1959
1960 #if FF_USE_LFN && !FF_FS_READONLY
1961 /*-----------------------------------------------------------------------*/
1962 /* FAT-LFN: Create a Numbered SFN */
1963 /*-----------------------------------------------------------------------*/
1964
1965 static void gen_numname (
1966 BYTE* dst, /* Pointer to the buffer to store numbered SFN */
1967 const BYTE* src, /* Pointer to SFN in directory form */
1968 const WCHAR* lfn, /* Pointer to LFN */
1969 UINT seq /* Sequence number */
1970 )
1971 {
1972 BYTE ns[8], c;
1973 UINT i, j;
1974 WCHAR wc;
1975 DWORD sreg;
1976
1977
1978 memcpy(dst, src, 11); /* Prepare the SFN to be modified */
1979
1980 if (seq > 5) { /* In case of many collisions, generate a hash number instead of sequential number */
1981 sreg = seq;
1982 while (*lfn) { /* Create a CRC as hash value */
1983 wc = *lfn++;
1984 for (i = 0; i < 16; i++) {
1985 sreg = (sreg << 1) + (wc & 1);
1986 wc >>= 1;
1987 if (sreg & 0x10000) sreg ^= 0x11021;
1988 }
1989 }
1990 seq = (UINT)sreg;
1991 }
1992
1993 /* Make suffix (~ + hexdecimal) */
1994 i = 7;
1995 do {
1996 c = (BYTE)((seq % 16) + '0'); seq /= 16;
1997 if (c > '9') c += 7;
1998 ns[i--] = c;
1999 } while (i && seq);
2000 ns[i] = '~';
2001
2002 /* Append the suffix to the SFN body */
2003 for (j = 0; j < i && dst[j] != ' '; j++) { /* Find the offset to append */
2004 if (dbc_1st(dst[j])) { /* To avoid DBC break up */
2005 if (j == i - 1) break;
2006 j++;
2007 }
2008 }
2009 do { /* Append the suffix */
2010 dst[j++] = (i < 8) ? ns[i++] : ' ';
2011 } while (j < 8);
2012 }
2013 #endif /* FF_USE_LFN && !FF_FS_READONLY */
2014
2015
2016
2017 #if FF_USE_LFN
2018 /*-----------------------------------------------------------------------*/
2019 /* FAT-LFN: Calculate checksum of an SFN entry */
2020 /*-----------------------------------------------------------------------*/
2021
2022 static BYTE sum_sfn (
2023 const BYTE* dir /* Pointer to the SFN entry */
2024 )
2025 {
2026 BYTE sum = 0;
2027 UINT n = 11;
2028
2029 do {
2030 sum = (sum >> 1) + (sum << 7) + *dir++;
2031 } while (--n);
2032 return sum;
2033 }
2034
2035 #endif /* FF_USE_LFN */
2036
2037
2038
2039 #if FF_FS_EXFAT
2040 /*-----------------------------------------------------------------------*/
2041 /* exFAT: Checksum */
2042 /*-----------------------------------------------------------------------*/
2043
2044 static WORD xdir_sum ( /* Get checksum of the directoly entry block */
2045 const BYTE* dir /* Directory entry block to be calculated */
2046 )
2047 {
2048 UINT i, szblk;
2049 WORD sum;
2050
2051
2052 szblk = (dir[XDIR_NumSec] + 1) * SZDIRE; /* Number of bytes of the entry block */
2053 for (i = sum = 0; i < szblk; i++) {
2054 if (i == XDIR_SetSum) { /* Skip 2-byte sum field */
2055 i++;
2056 } else {
2057 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + dir[i];
2058 }
2059 }
2060 return sum;
2061 }
2062
2063
2064
2065 static WORD xname_sum ( /* Get check sum (to be used as hash) of the file name */
2066 const WCHAR* name /* File name to be calculated */
2067 )
2068 {
2069 WCHAR chr;
2070 WORD sum = 0;
2071
2072
2073 while ((chr = *name++) != 0) {
2074 chr = (WCHAR)ff_wtoupper(chr); /* File name needs to be up-case converted */
2075 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr & 0xFF);
2076 sum = ((sum & 1) ? 0x8000 : 0) + (sum >> 1) + (chr >> 8);
2077 }
2078 return sum;
2079 }
2080
2081
2082 #if !FF_FS_READONLY && FF_USE_MKFS
2083 static DWORD xsum32 ( /* Returns 32-bit checksum */
2084 BYTE dat, /* Byte to be calculated (byte-by-byte processing) */
2085 DWORD sum /* Previous sum value */
2086 )
2087 {
2088 sum = ((sum & 1) ? 0x80000000 : 0) + (sum >> 1) + dat;
2089 return sum;
2090 }
2091 #endif
2092
2093
2094
2095 /*-----------------------------------*/
2096 /* exFAT: Get a directry entry block */
2097 /*-----------------------------------*/
2098
2099 static FRESULT load_xdir ( /* FR_INT_ERR: invalid entry block */
2100 DIR* dp /* Reading direcotry object pointing top of the entry block to load */
2101 )
2102 {
2103 FRESULT res;
2104 UINT i, sz_ent;
2105 BYTE *dirb = dp->obj.fs->dirbuf; /* Pointer to the on-memory direcotry entry block 85+C0+C1s */
2106
2107
2108 /* Load file directory entry */
2109 res = move_window(dp->obj.fs, dp->sect);
2110 if (res != FR_OK) return res;
2111 if (dp->dir[XDIR_Type] != ET_FILEDIR) return FR_INT_ERR; /* Invalid order */
2112 memcpy(dirb + 0 * SZDIRE, dp->dir, SZDIRE);
2113 sz_ent = (dirb[XDIR_NumSec] + 1) * SZDIRE;
2114 if (sz_ent < 3 * SZDIRE || sz_ent > 19 * SZDIRE) return FR_INT_ERR;
2115
2116 /* Load stream extension entry */
2117 res = dir_next(dp, 0);
2118 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2119 if (res != FR_OK) return res;
2120 res = move_window(dp->obj.fs, dp->sect);
2121 if (res != FR_OK) return res;
2122 if (dp->dir[XDIR_Type] != ET_STREAM) return FR_INT_ERR; /* Invalid order */
2123 memcpy(dirb + 1 * SZDIRE, dp->dir, SZDIRE);
2124 if (MAXDIRB(dirb[XDIR_NumName]) > sz_ent) return FR_INT_ERR;
2125
2126 /* Load file name entries */
2127 i = 2 * SZDIRE; /* Name offset to load */
2128 do {
2129 res = dir_next(dp, 0);
2130 if (res == FR_NO_FILE) res = FR_INT_ERR; /* It cannot be */
2131 if (res != FR_OK) return res;
2132 res = move_window(dp->obj.fs, dp->sect);
2133 if (res != FR_OK) return res;
2134 if (dp->dir[XDIR_Type] != ET_FILENAME) return FR_INT_ERR; /* Invalid order */
2135 if (i < MAXDIRB(FF_MAX_LFN)) memcpy(dirb + i, dp->dir, SZDIRE);
2136 } while ((i += SZDIRE) < sz_ent);
2137
2138 /* Sanity check (do it for only accessible object) */
2139 if (i <= MAXDIRB(FF_MAX_LFN)) {
2140 if (xdir_sum(dirb) != ld_word(dirb + XDIR_SetSum)) return FR_INT_ERR;
2141 }
2142 return FR_OK;
2143 }
2144
2145
2146 /*------------------------------------------------------------------*/
2147 /* exFAT: Initialize object allocation info with loaded entry block */
2148 /*------------------------------------------------------------------*/
2149
2150 static void init_alloc_info (
2151 FATFS* fs, /* Filesystem object */
2152 FFOBJID* obj /* Object allocation information to be initialized */
2153 )
2154 {
2155 obj->sclust = ld_dword(fs->dirbuf + XDIR_FstClus); /* Start cluster */
2156 obj->objsize = ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2157 obj->stat = fs->dirbuf[XDIR_GenFlags] & 2; /* Allocation status */
2158 obj->n_frag = 0; /* No last fragment info */
2159 }
2160
2161
2162
2163 #if !FF_FS_READONLY || FF_FS_RPATH != 0
2164 /*------------------------------------------------*/
2165 /* exFAT: Load the object's directory entry block */
2166 /*------------------------------------------------*/
2167
2168 static FRESULT load_obj_xdir (
2169 DIR* dp, /* Blank directory object to be used to access containing direcotry */
2170 const FFOBJID* obj /* Object with its containing directory information */
2171 )
2172 {
2173 FRESULT res;
2174
2175 /* Open object containing directory */
2176 dp->obj.fs = obj->fs;
2177 dp->obj.sclust = obj->c_scl;
2178 dp->obj.stat = (BYTE)obj->c_size;
2179 dp->obj.objsize = obj->c_size & 0xFFFFFF00;
2180 dp->obj.n_frag = 0;
2181 dp->blk_ofs = obj->c_ofs;
2182
2183 res = dir_sdi(dp, dp->blk_ofs); /* Goto object's entry block */
2184 if (res == FR_OK) {
2185 res = load_xdir(dp); /* Load the object's entry block */
2186 }
2187 return res;
2188 }
2189 #endif
2190
2191
2192 #if !FF_FS_READONLY
2193 /*----------------------------------------*/
2194 /* exFAT: Store the directory entry block */
2195 /*----------------------------------------*/
2196
2197 static FRESULT store_xdir (
2198 DIR* dp /* Pointer to the direcotry object */
2199 )
2200 {
2201 FRESULT res;
2202 UINT nent;
2203 BYTE *dirb = dp->obj.fs->dirbuf; /* Pointer to the direcotry entry block 85+C0+C1s */
2204
2205 /* Create set sum */
2206 st_word(dirb + XDIR_SetSum, xdir_sum(dirb));
2207 nent = dirb[XDIR_NumSec] + 1;
2208
2209 /* Store the direcotry entry block to the directory */
2210 res = dir_sdi(dp, dp->blk_ofs);
2211 while (res == FR_OK) {
2212 res = move_window(dp->obj.fs, dp->sect);
2213 if (res != FR_OK) break;
2214 memcpy(dp->dir, dirb, SZDIRE);
2215 dp->obj.fs->wflag = 1;
2216 if (--nent == 0) break;
2217 dirb += SZDIRE;
2218 res = dir_next(dp, 0);
2219 }
2220 return (res == FR_OK || res == FR_DISK_ERR) ? res : FR_INT_ERR;
2221 }
2222
2223
2224
2225 /*-------------------------------------------*/
2226 /* exFAT: Create a new directory enrty block */
2227 /*-------------------------------------------*/
2228
2229 static void create_xdir (
2230 BYTE* dirb, /* Pointer to the direcotry entry block buffer */
2231 const WCHAR* lfn /* Pointer to the object name */
2232 )
2233 {
2234 UINT i;
2235 BYTE nc1, nlen;
2236 WCHAR wc;
2237
2238
2239 /* Create file-directory and stream-extension entry */
2240 memset(dirb, 0, 2 * SZDIRE);
2241 dirb[0 * SZDIRE + XDIR_Type] = ET_FILEDIR;
2242 dirb[1 * SZDIRE + XDIR_Type] = ET_STREAM;
2243
2244 /* Create file-name entries */
2245 i = SZDIRE * 2; /* Top of file_name entries */
2246 nlen = nc1 = 0; wc = 1;
2247 do {
2248 dirb[i++] = ET_FILENAME; dirb[i++] = 0;
2249 do { /* Fill name field */
2250 if (wc != 0 && (wc = lfn[nlen]) != 0) nlen++; /* Get a character if exist */
2251 st_word(dirb + i, wc); /* Store it */
2252 i += 2;
2253 } while (i % SZDIRE != 0);
2254 nc1++;
2255 } while (lfn[nlen]); /* Fill next entry if any char follows */
2256
2257 dirb[XDIR_NumName] = nlen; /* Set name length */
2258 dirb[XDIR_NumSec] = 1 + nc1; /* Set secondary count (C0 + C1s) */
2259 st_word(dirb + XDIR_NameHash, xname_sum(lfn)); /* Set name hash */
2260 }
2261
2262 #endif /* !FF_FS_READONLY */
2263 #endif /* FF_FS_EXFAT */
2264
2265
2266
2267 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 || FF_USE_LABEL || FF_FS_EXFAT
2268 /*-----------------------------------------------------------------------*/
2269 /* Read an object from the directory */
2270 /*-----------------------------------------------------------------------*/
2271
2272 #define DIR_READ_FILE(dp) dir_read(dp, 0)
2273 #define DIR_READ_LABEL(dp) dir_read(dp, 1)
2274
2275 static FRESULT dir_read (
2276 DIR* dp, /* Pointer to the directory object */
2277 int vol /* Filtered by 0:file/directory or 1:volume label */
2278 )
2279 {
2280 FRESULT res = FR_NO_FILE;
2281 FATFS *fs = dp->obj.fs;
2282 BYTE attr, b;
2283 #if FF_USE_LFN
2284 BYTE ord = 0xFF, sum = 0xFF;
2285 #endif
2286
2287 while (dp->sect) {
2288 res = move_window(fs, dp->sect);
2289 if (res != FR_OK) break;
2290 b = dp->dir[DIR_Name]; /* Test for the entry type */
2291 if (b == 0) {
2292 res = FR_NO_FILE; break; /* Reached to end of the directory */
2293 }
2294 #if FF_FS_EXFAT
2295 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2296 if (FF_USE_LABEL && vol) {
2297 if (b == ET_VLABEL) break; /* Volume label entry? */
2298 } else {
2299 if (b == ET_FILEDIR) { /* Start of the file entry block? */
2300 dp->blk_ofs = dp->dptr; /* Get location of the block */
2301 res = load_xdir(dp); /* Load the entry block */
2302 if (res == FR_OK) {
2303 dp->obj.attr = fs->dirbuf[XDIR_Attr] & AM_MASK; /* Get attribute */
2304 }
2305 break;
2306 }
2307 }
2308 } else
2309 #endif
2310 { /* On the FAT/FAT32 volume */
2311 dp->obj.attr = attr = dp->dir[DIR_Attr] & AM_MASK; /* Get attribute */
2312 #if FF_USE_LFN /* LFN configuration */
2313 if (b == DDEM || b == '.' || (int)((attr & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
2314 ord = 0xFF;
2315 } else {
2316 if (attr == AM_LFN) { /* An LFN entry is found */
2317 if (b & LLEF) { /* Is it start of an LFN sequence? */
2318 sum = dp->dir[LDIR_Chksum];
2319 b &= (BYTE)~LLEF; ord = b;
2320 dp->blk_ofs = dp->dptr;
2321 }
2322 /* Check LFN validity and capture it */
2323 ord = (b == ord && sum == dp->dir[LDIR_Chksum] && pick_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2324 } else { /* An SFN entry is found */
2325 if (ord != 0 || sum != sum_sfn(dp->dir)) { /* Is there a valid LFN? */
2326 dp->blk_ofs = 0xFFFFFFFF; /* It has no LFN. */
2327 }
2328 break;
2329 }
2330 }
2331 #else /* Non LFN configuration */
2332 if (b != DDEM && b != '.' && attr != AM_LFN && (int)((attr & ~AM_ARC) == AM_VOL) == vol) { /* Is it a valid entry? */
2333 break;
2334 }
2335 #endif
2336 }
2337 res = dir_next(dp, 0); /* Next entry */
2338 if (res != FR_OK) break;
2339 }
2340
2341 if (res != FR_OK) dp->sect = 0; /* Terminate the read operation on error or EOT */
2342 return res;
2343 }
2344
2345 #endif /* FF_FS_MINIMIZE <= 1 || FF_USE_LABEL || FF_FS_RPATH >= 2 */
2346
2347
2348
2349 /*-----------------------------------------------------------------------*/
2350 /* Directory handling - Find an object in the directory */
2351 /*-----------------------------------------------------------------------*/
2352
2353 static FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
2354 DIR* dp /* Pointer to the directory object with the file name */
2355 )
2356 {
2357 FRESULT res;
2358 FATFS *fs = dp->obj.fs;
2359 BYTE c;
2360 #if FF_USE_LFN
2361 BYTE a, ord, sum;
2362 #endif
2363
2364 res = dir_sdi(dp, 0); /* Rewind directory object */
2365 if (res != FR_OK) return res;
2366 #if FF_FS_EXFAT
2367 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2368 BYTE nc;
2369 UINT di, ni;
2370 WORD hash = xname_sum(fs->lfnbuf); /* Hash value of the name to find */
2371
2372 while ((res = DIR_READ_FILE(dp)) == FR_OK) { /* Read an item */
2373 #if FF_MAX_LFN < 255
2374 if (fs->dirbuf[XDIR_NumName] > FF_MAX_LFN) continue; /* Skip comparison if inaccessible object name */
2375 #endif
2376 if (ld_word(fs->dirbuf + XDIR_NameHash) != hash) continue; /* Skip comparison if hash mismatched */
2377 for (nc = fs->dirbuf[XDIR_NumName], di = SZDIRE * 2, ni = 0; nc; nc--, di += 2, ni++) { /* Compare the name */
2378 if ((di % SZDIRE) == 0) di += 2;
2379 if (ff_wtoupper(ld_word(fs->dirbuf + di)) != ff_wtoupper(fs->lfnbuf[ni])) break;
2380 }
2381 if (nc == 0 && !fs->lfnbuf[ni]) break; /* Name matched? */
2382 }
2383 return res;
2384 }
2385 #endif
2386 /* On the FAT/FAT32 volume */
2387 #if FF_USE_LFN
2388 ord = sum = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2389 #endif
2390 do {
2391 res = move_window(fs, dp->sect);
2392 if (res != FR_OK) break;
2393 c = dp->dir[DIR_Name];
2394 if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
2395 #if FF_USE_LFN /* LFN configuration */
2396 dp->obj.attr = a = dp->dir[DIR_Attr] & AM_MASK;
2397 if (c == DDEM || ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
2398 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2399 } else {
2400 if (a == AM_LFN) { /* An LFN entry is found */
2401 if (!(dp->fn[NSFLAG] & NS_NOLFN)) {
2402 if (c & LLEF) { /* Is it start of LFN sequence? */
2403 sum = dp->dir[LDIR_Chksum];
2404 c &= (BYTE)~LLEF; ord = c; /* LFN start order */
2405 dp->blk_ofs = dp->dptr; /* Start offset of LFN */
2406 }
2407 /* Check validity of the LFN entry and compare it with given name */
2408 ord = (c == ord && sum == dp->dir[LDIR_Chksum] && cmp_lfn(fs->lfnbuf, dp->dir)) ? ord - 1 : 0xFF;
2409 }
2410 } else { /* An SFN entry is found */
2411 if (ord == 0 && sum == sum_sfn(dp->dir)) break; /* LFN matched? */
2412 if (!(dp->fn[NSFLAG] & NS_LOSS) && !memcmp(dp->dir, dp->fn, 11)) break; /* SFN matched? */
2413 ord = 0xFF; dp->blk_ofs = 0xFFFFFFFF; /* Reset LFN sequence */
2414 }
2415 }
2416 #else /* Non LFN configuration */
2417 dp->obj.attr = dp->dir[DIR_Attr] & AM_MASK;
2418 if (!(dp->dir[DIR_Attr] & AM_VOL) && !memcmp(dp->dir, dp->fn, 11)) break; /* Is it a valid entry? */
2419 #endif
2420 res = dir_next(dp, 0); /* Next entry */
2421 } while (res == FR_OK);
2422
2423 return res;
2424 }
2425
2426
2427
2428
2429 #if !FF_FS_READONLY
2430 /*-----------------------------------------------------------------------*/
2431 /* Register an object to the directory */
2432 /*-----------------------------------------------------------------------*/
2433
2434 static FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
2435 DIR* dp /* Target directory with object name to be created */
2436 )
2437 {
2438 FRESULT res;
2439 FATFS *fs = dp->obj.fs;
2440 #if FF_USE_LFN /* LFN configuration */
2441 UINT n, len, n_ent;
2442 BYTE sn[12], sum;
2443
2444
2445 if (dp->fn[NSFLAG] & (NS_DOT | NS_NONAME)) return FR_INVALID_NAME; /* Check name validity */
2446 for (len = 0; fs->lfnbuf[len]; len++) ; /* Get lfn length */
2447
2448 #if FF_FS_EXFAT
2449 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2450 n_ent = (len + 14) / 15 + 2; /* Number of entries to allocate (85+C0+C1s) */
2451 res = dir_alloc(dp, n_ent); /* Allocate directory entries */
2452 if (res != FR_OK) return res;
2453 dp->blk_ofs = dp->dptr - SZDIRE * (n_ent - 1); /* Set the allocated entry block offset */
2454
2455 if (dp->obj.stat & 4) { /* Has the directory been stretched by new allocation? */
2456 dp->obj.stat &= ~4;
2457 res = fill_first_frag(&dp->obj); /* Fill the first fragment on the FAT if needed */
2458 if (res != FR_OK) return res;
2459 res = fill_last_frag(&dp->obj, dp->clust, 0xFFFFFFFF); /* Fill the last fragment on the FAT if needed */
2460 if (res != FR_OK) return res;
2461 if (dp->obj.sclust != 0) { /* Is it a sub-directory? */
2462 DIR dj;
2463
2464 res = load_obj_xdir(&dj, &dp->obj); /* Load the object status */
2465 if (res != FR_OK) return res;
2466 dp->obj.objsize += (DWORD)fs->csize * SS(fs); /* Increase the directory size by cluster size */
2467 st_qword(fs->dirbuf + XDIR_FileSize, dp->obj.objsize);
2468 st_qword(fs->dirbuf + XDIR_ValidFileSize, dp->obj.objsize);
2469 fs->dirbuf[XDIR_GenFlags] = dp->obj.stat | 1; /* Update the allocation status */
2470 res = store_xdir(&dj); /* Store the object status */
2471 if (res != FR_OK) return res;
2472 }
2473 }
2474
2475 create_xdir(fs->dirbuf, fs->lfnbuf); /* Create on-memory directory block to be written later */
2476 return FR_OK;
2477 }
2478 #endif
2479 /* On the FAT/FAT32 volume */
2480 memcpy(sn, dp->fn, 12);
2481 if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
2482 dp->fn[NSFLAG] = NS_NOLFN; /* Find only SFN */
2483 for (n = 1; n < 100; n++) {
2484 gen_numname(dp->fn, sn, fs->lfnbuf, n); /* Generate a numbered name */
2485 res = dir_find(dp); /* Check if the name collides with existing SFN */
2486 if (res != FR_OK) break;
2487 }
2488 if (n == 100) return FR_DENIED; /* Abort if too many collisions */
2489 if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
2490 dp->fn[NSFLAG] = sn[NSFLAG];
2491 }
2492
2493 /* Create an SFN with/without LFNs. */
2494 n_ent = (sn[NSFLAG] & NS_LFN) ? (len + 12) / 13 + 1 : 1; /* Number of entries to allocate */
2495 res = dir_alloc(dp, n_ent); /* Allocate entries */
2496 if (res == FR_OK && --n_ent) { /* Set LFN entry if needed */
2497 res = dir_sdi(dp, dp->dptr - n_ent * SZDIRE);
2498 if (res == FR_OK) {
2499 sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
2500 do { /* Store LFN entries in bottom first */
2501 res = move_window(fs, dp->sect);
2502 if (res != FR_OK) break;
2503 put_lfn(fs->lfnbuf, dp->dir, (BYTE)n_ent, sum);
2504 fs->wflag = 1;
2505 res = dir_next(dp, 0); /* Next entry */
2506 } while (res == FR_OK && --n_ent);
2507 }
2508 }
2509
2510 #else /* Non LFN configuration */
2511 res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
2512
2513 #endif
2514
2515 /* Set SFN entry */
2516 if (res == FR_OK) {
2517 res = move_window(fs, dp->sect);
2518 if (res == FR_OK) {
2519 memset(dp->dir, 0, SZDIRE); /* Clean the entry */
2520 memcpy(dp->dir + DIR_Name, dp->fn, 11); /* Put SFN */
2521 #if FF_USE_LFN
2522 dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY | NS_EXT); /* Put NT flag */
2523 #endif
2524 fs->wflag = 1;
2525 }
2526 }
2527
2528 return res;
2529 }
2530
2531 #endif /* !FF_FS_READONLY */
2532
2533
2534
2535 #if !FF_FS_READONLY && FF_FS_MINIMIZE == 0
2536 /*-----------------------------------------------------------------------*/
2537 /* Remove an object from the directory */
2538 /*-----------------------------------------------------------------------*/
2539
2540 static FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
2541 DIR* dp /* Directory object pointing the entry to be removed */
2542 )
2543 {
2544 FRESULT res;
2545 FATFS *fs = dp->obj.fs;
2546 #if FF_USE_LFN /* LFN configuration */
2547 DWORD last = dp->dptr;
2548
2549 res = (dp->blk_ofs == 0xFFFFFFFF) ? FR_OK : dir_sdi(dp, dp->blk_ofs); /* Goto top of the entry block if LFN is exist */
2550 if (res == FR_OK) {
2551 do {
2552 res = move_window(fs, dp->sect);
2553 if (res != FR_OK) break;
2554 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
2555 dp->dir[XDIR_Type] &= 0x7F; /* Clear the entry InUse flag. */
2556 } else { /* On the FAT/FAT32 volume */
2557 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'. */
2558 }
2559 fs->wflag = 1;
2560 if (dp->dptr >= last) break; /* If reached last entry then all entries of the object has been deleted. */
2561 res = dir_next(dp, 0); /* Next entry */
2562 } while (res == FR_OK);
2563 if (res == FR_NO_FILE) res = FR_INT_ERR;
2564 }
2565 #else /* Non LFN configuration */
2566
2567 res = move_window(fs, dp->sect);
2568 if (res == FR_OK) {
2569 dp->dir[DIR_Name] = DDEM; /* Mark the entry 'deleted'.*/
2570 fs->wflag = 1;
2571 }
2572 #endif
2573
2574 return res;
2575 }
2576
2577 #endif /* !FF_FS_READONLY && FF_FS_MINIMIZE == 0 */
2578
2579
2580
2581 #if FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2
2582 /*-----------------------------------------------------------------------*/
2583 /* Get file information from directory entry */
2584 /*-----------------------------------------------------------------------*/
2585
2586 static void get_fileinfo (
2587 DIR* dp, /* Pointer to the directory object */
2588 FILINFO* fno /* Pointer to the file information to be filled */
2589 )
2590 {
2591 UINT si, di;
2592 #if FF_USE_LFN
2593 BYTE lcf;
2594 WCHAR wc, hs;
2595 FATFS *fs = dp->obj.fs;
2596 UINT nw;
2597 #else
2598 TCHAR c;
2599 #endif
2600
2601
2602 fno->fname[0] = 0; /* Invaidate file info */
2603 if (dp->sect == 0) return; /* Exit if read pointer has reached end of directory */
2604
2605 #if FF_USE_LFN /* LFN configuration */
2606 #if FF_FS_EXFAT
2607 if (fs->fs_type == FS_EXFAT) { /* exFAT volume */
2608 UINT nc = 0;
2609
2610 si = SZDIRE * 2; di = 0; /* 1st C1 entry in the entry block */
2611 hs = 0;
2612 while (nc < fs->dirbuf[XDIR_NumName]) {
2613 if (si >= MAXDIRB(FF_MAX_LFN)) { di = 0; break; } /* Truncated directory block? */
2614 if ((si % SZDIRE) == 0) si += 2; /* Skip entry type field */
2615 wc = ld_word(fs->dirbuf + si); si += 2; nc++; /* Get a character */
2616 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2617 hs = wc; continue; /* Get low surrogate */
2618 }
2619 nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2620 if (nw == 0) { di = 0; break; } /* Buffer overflow or wrong char? */
2621 di += nw;
2622 hs = 0;
2623 }
2624 if (hs != 0) di = 0; /* Broken surrogate pair? */
2625 if (di == 0) fno->fname[di++] = '?'; /* Inaccessible object name? */
2626 fno->fname[di] = 0; /* Terminate the name */
2627 fno->altname[0] = 0; /* exFAT does not support SFN */
2628
2629 fno->fattrib = fs->dirbuf[XDIR_Attr] & AM_MASKX; /* Attribute */
2630 fno->fsize = (fno->fattrib & AM_DIR) ? 0 : ld_qword(fs->dirbuf + XDIR_FileSize); /* Size */
2631 fno->ftime = ld_word(fs->dirbuf + XDIR_ModTime + 0); /* Time */
2632 fno->fdate = ld_word(fs->dirbuf + XDIR_ModTime + 2); /* Date */
2633 return;
2634 } else
2635 #endif
2636 { /* FAT/FAT32 volume */
2637 if (dp->blk_ofs != 0xFFFFFFFF) { /* Get LFN if available */
2638 si = di = 0;
2639 hs = 0;
2640 while (fs->lfnbuf[si] != 0) {
2641 wc = fs->lfnbuf[si++]; /* Get an LFN character (UTF-16) */
2642 if (hs == 0 && IsSurrogate(wc)) { /* Is it a surrogate? */
2643 hs = wc; continue; /* Get low surrogate */
2644 }
2645 nw = put_utf((DWORD)hs << 16 | wc, &fno->fname[di], FF_LFN_BUF - di); /* Store it in API encoding */
2646 if (nw == 0) { di = 0; break; } /* Buffer overflow or wrong char? */
2647 di += nw;
2648 hs = 0;
2649 }
2650 if (hs != 0) di = 0; /* Broken surrogate pair? */
2651 fno->fname[di] = 0; /* Terminate the LFN (null string means LFN is invalid) */
2652 }
2653 }
2654
2655 si = di = 0;
2656 while (si < 11) { /* Get SFN from SFN entry */
2657 wc = dp->dir[si++]; /* Get a char */
2658 if (wc == ' ') continue; /* Skip padding spaces */
2659 if (wc == RDDEM) wc = DDEM; /* Restore replaced DDEM character */
2660 if (si == 9 && di < FF_SFN_BUF) fno->altname[di++] = '.'; /* Insert a . if extension is exist */
2661 #if FF_LFN_UNICODE >= 1 /* Unicode output */
2662 if (dbc_1st((BYTE)wc) && si != 8 && si != 11 && dbc_2nd(dp->dir[si])) { /* Make a DBC if needed */
2663 wc = wc << 8 | dp->dir[si++];
2664 }
2665 wc = ff_oem2uni(wc, CODEPAGE); /* ANSI/OEM -> Unicode */
2666 if (wc == 0) { di = 0; break; } /* Wrong char in the current code page? */
2667 nw = put_utf(wc, &fno->altname[di], FF_SFN_BUF - di); /* Store it in API encoding */
2668 if (nw == 0) { di = 0; break; } /* Buffer overflow? */
2669 di += nw;
2670 #else /* ANSI/OEM output */
2671 fno->altname[di++] = (TCHAR)wc; /* Store it without any conversion */
2672 #endif
2673 }
2674 fno->altname[di] = 0; /* Terminate the SFN (null string means SFN is invalid) */
2675
2676 if (fno->fname[0] == 0) { /* If LFN is invalid, altname[] needs to be copied to fname[] */
2677 if (di == 0) { /* If LFN and SFN both are invalid, this object is inaccesible */
2678 fno->fname[di++] = '?';
2679 } else {
2680 for (si = di = 0, lcf = NS_BODY; fno->altname[si]; si++, di++) { /* Copy altname[] to fname[] with case information */
2681 wc = (WCHAR)fno->altname[si];
2682 if (wc == '.') lcf = NS_EXT;
2683 if (IsUpper(wc) && (dp->dir[DIR_NTres] & lcf)) wc += 0x20;
2684 fno->fname[di] = (TCHAR)wc;
2685 }
2686 }
2687 fno->fname[di] = 0; /* Terminate the LFN */
2688 if (!dp->dir[DIR_NTres]) fno->altname[0] = 0; /* Altname is not needed if neither LFN nor case info is exist. */
2689 }
2690
2691 #else /* Non-LFN configuration */
2692 si = di = 0;
2693 while (si < 11) { /* Copy name body and extension */
2694 c = (TCHAR)dp->dir[si++];
2695 if (c == ' ') continue; /* Skip padding spaces */
2696 if (c == RDDEM) c = DDEM; /* Restore replaced DDEM character */
2697 if (si == 9) fno->fname[di++] = '.';/* Insert a . if extension is exist */
2698 fno->fname[di++] = c;
2699 }
2700 fno->fname[di] = 0; /* Terminate the SFN */
2701 #endif
2702
2703 fno->fattrib = dp->dir[DIR_Attr] & AM_MASK; /* Attribute */
2704 fno->fsize = ld_dword(dp->dir + DIR_FileSize); /* Size */
2705 fno->ftime = ld_word(dp->dir + DIR_ModTime + 0); /* Time */
2706 fno->fdate = ld_word(dp->dir + DIR_ModTime + 2); /* Date */
2707 }
2708
2709 #endif /* FF_FS_MINIMIZE <= 1 || FF_FS_RPATH >= 2 */
2710
2711
2712
2713 #if FF_USE_FIND && FF_FS_MINIMIZE <= 1
2714 /*-----------------------------------------------------------------------*/
2715 /* Pattern matching */
2716 /*-----------------------------------------------------------------------*/
2717
2718 #define FIND_RECURS 4 /* Maximum number of wildcard terms in the pattern to limit recursion */
2719
2720
2721 static DWORD get_achar ( /* Get a character and advance ptr */
2722 const TCHAR** ptr /* Pointer to pointer to the ANSI/OEM or Unicode string */
2723 )
2724 {
2725 DWORD chr;
2726
2727
2728 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode input */
2729 chr = tchar2uni(ptr);
2730 if (chr == 0xFFFFFFFF) chr = 0; /* Wrong UTF encoding is recognized as end of the string */
2731 chr = ff_wtoupper(chr);
2732
2733 #else /* ANSI/OEM input */
2734 chr = (BYTE)*(*ptr)++; /* Get a byte */
2735 if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
2736 #if FF_CODE_PAGE == 0
2737 if (ExCvt && chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2738 #elif FF_CODE_PAGE < 900
2739 if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
2740 #endif
2741 #if FF_CODE_PAGE == 0 || FF_CODE_PAGE >= 900
2742 if (dbc_1st((BYTE)chr)) { /* Get DBC 2nd byte if needed */
2743 chr = dbc_2nd((BYTE)**ptr) ? chr << 8 | (BYTE)*(*ptr)++ : 0;
2744 }
2745 #endif
2746
2747 #endif
2748 return chr;
2749 }
2750
2751
2752 static int pattern_match ( /* 0:mismatched, 1:matched */
2753 const TCHAR* pat, /* Matching pattern */
2754 const TCHAR* nam, /* String to be tested */
2755 UINT skip, /* Number of pre-skip chars (number of ?s, b8:infinite (* specified)) */
2756 UINT recur /* Recursion count */
2757 )
2758 {
2759 const TCHAR *pptr, *nptr;
2760 DWORD pchr, nchr;
2761 UINT sk;
2762
2763
2764 while ((skip & 0xFF) != 0) { /* Pre-skip name chars */
2765 if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
2766 skip--;
2767 }
2768 if (*pat == 0 && skip) return 1; /* Matched? (short circuit) */
2769
2770 do {
2771 pptr = pat; nptr = nam; /* Top of pattern and name to match */
2772 for (;;) {
2773 if (*pptr == '?' || *pptr == '*') { /* Wildcard term? */
2774 if (recur == 0) return 0; /* Too many wildcard terms? */
2775 sk = 0;
2776 do { /* Analyze the wildcard term */
2777 if (*pptr++ == '?') sk++; else sk |= 0x100;
2778 } while (*pptr == '?' || *pptr == '*');
2779 if (pattern_match(pptr, nptr, sk, recur - 1)) return 1; /* Test new branch (recursive call) */
2780 nchr = *nptr; break; /* Branch mismatched */
2781 }
2782 pchr = get_achar(&pptr); /* Get a pattern char */
2783 nchr = get_achar(&nptr); /* Get a name char */
2784 if (pchr != nchr) break; /* Branch mismatched? */
2785 if (pchr == 0) return 1; /* Branch matched? (matched at end of both strings) */
2786 }
2787 get_achar(&nam); /* nam++ */
2788 } while (skip && nchr); /* Retry until end of name if infinite search is specified */
2789
2790 return 0;
2791 }
2792
2793 #endif /* FF_USE_FIND && FF_FS_MINIMIZE <= 1 */
2794
2795
2796
2797 /*-----------------------------------------------------------------------*/
2798 /* Pick a top segment and create the object name in directory form */
2799 /*-----------------------------------------------------------------------*/
2800
2801 static FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
2802 DIR* dp, /* Pointer to the directory object */
2803 const TCHAR** path /* Pointer to pointer to the segment in the path string */
2804 )
2805 {
2806 #if FF_USE_LFN /* LFN configuration */
2807 BYTE b, cf;
2808 WCHAR wc, *lfn;
2809 DWORD uc;
2810 UINT i, ni, si, di;
2811 const TCHAR *p;
2812
2813
2814 /* Create LFN into LFN working buffer */
2815 p = *path; lfn = dp->obj.fs->lfnbuf; di = 0;
2816 for (;;) {
2817 uc = tchar2uni(&p); /* Get a character */
2818 if (uc == 0xFFFFFFFF) return FR_INVALID_NAME; /* Invalid code or UTF decode error */
2819 if (uc >= 0x10000) lfn[di++] = (WCHAR)(uc >> 16); /* Store high surrogate if needed */
2820 wc = (WCHAR)uc;
2821 if (wc < ' ' || IsSeparator(wc)) break; /* Break if end of the path or a separator is found */
2822 if (wc < 0x80 && strchr("*:<>|\"\?\x7F", (int)wc)) return FR_INVALID_NAME; /* Reject illegal characters for LFN */
2823 if (di >= FF_MAX_LFN) return FR_INVALID_NAME; /* Reject too long name */
2824 lfn[di++] = wc; /* Store the Unicode character */
2825 }
2826 if (wc < ' ') { /* Stopped at end of the path? */
2827 cf = NS_LAST; /* Last segment */
2828 } else { /* Stopped at a separator */
2829 while (IsSeparator(*p)) p++; /* Skip duplicated separators if exist */
2830 cf = 0; /* Next segment may follow */
2831 if (IsTerminator(*p)) cf = NS_LAST; /* Ignore terminating separator */
2832 }
2833 *path = p; /* Return pointer to the next segment */
2834
2835 #if FF_FS_RPATH != 0
2836 if ((di == 1 && lfn[di - 1] == '.') ||
2837 (di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot name? */
2838 lfn[di] = 0;
2839 for (i = 0; i < 11; i++) { /* Create dot name for SFN entry */
2840 dp->fn[i] = (i < di) ? '.' : ' ';
2841 }
2842 dp->fn[i] = cf | NS_DOT; /* This is a dot entry */
2843 return FR_OK;
2844 }
2845 #endif
2846 while (di) { /* Snip off trailing spaces and dots if exist */
2847 wc = lfn[di - 1];
2848 if (wc != ' ' && wc != '.') break;
2849 di--;
2850 }
2851 lfn[di] = 0; /* LFN is created into the working buffer */
2852 if (di == 0) return FR_INVALID_NAME; /* Reject null name */
2853
2854 /* Create SFN in directory form */
2855 for (si = 0; lfn[si] == ' '; si++) ; /* Remove leading spaces */
2856 if (si > 0 || lfn[si] == '.') cf |= NS_LOSS | NS_LFN; /* Is there any leading space or dot? */
2857 while (di > 0 && lfn[di - 1] != '.') di--; /* Find last dot (di<=si: no extension) */
2858
2859 memset(dp->fn, ' ', 11);
2860 i = b = 0; ni = 8;
2861 for (;;) {
2862 wc = lfn[si++]; /* Get an LFN character */
2863 if (wc == 0) break; /* Break on end of the LFN */
2864 if (wc == ' ' || (wc == '.' && si != di)) { /* Remove embedded spaces and dots */
2865 cf |= NS_LOSS | NS_LFN;
2866 continue;
2867 }
2868
2869 if (i >= ni || si == di) { /* End of field? */
2870 if (ni == 11) { /* Name extension overflow? */
2871 cf |= NS_LOSS | NS_LFN;
2872 break;
2873 }
2874 if (si != di) cf |= NS_LOSS | NS_LFN; /* Name body overflow? */
2875 if (si > di) break; /* No name extension? */
2876 si = di; i = 8; ni = 11; b <<= 2; /* Enter name extension */
2877 continue;
2878 }
2879
2880 if (wc >= 0x80) { /* Is this an extended character? */
2881 cf |= NS_LFN; /* LFN entry needs to be created */
2882 #if FF_CODE_PAGE == 0
2883 if (ExCvt) { /* In SBCS cfg */
2884 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2885 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2886 } else { /* In DBCS cfg */
2887 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Up-convert ==> ANSI/OEM code */
2888 }
2889 #elif FF_CODE_PAGE < 900 /* In SBCS cfg */
2890 wc = ff_uni2oem(wc, CODEPAGE); /* Unicode ==> ANSI/OEM code */
2891 if (wc & 0x80) wc = ExCvt[wc & 0x7F]; /* Convert extended character to upper (SBCS) */
2892 #else /* In DBCS cfg */
2893 wc = ff_uni2oem(ff_wtoupper(wc), CODEPAGE); /* Unicode ==> Up-convert ==> ANSI/OEM code */
2894 #endif
2895 }
2896
2897 if (wc >= 0x100) { /* Is this a DBC? */
2898 if (i >= ni - 1) { /* Field overflow? */
2899 cf |= NS_LOSS | NS_LFN;
2900 i = ni; continue; /* Next field */
2901 }
2902 dp->fn[i++] = (BYTE)(wc >> 8); /* Put 1st byte */
2903 } else { /* SBC */
2904 if (wc == 0 || strchr("+,;=[]", (int)wc)) { /* Replace illegal characters for SFN */
2905 wc = '_'; cf |= NS_LOSS | NS_LFN;/* Lossy conversion */
2906 } else {
2907 if (IsUpper(wc)) { /* ASCII upper case? */
2908 b |= 2;
2909 }
2910 if (IsLower(wc)) { /* ASCII lower case? */
2911 b |= 1; wc -= 0x20;
2912 }
2913 }
2914 }
2915 dp->fn[i++] = (BYTE)wc;
2916 }
2917
2918 if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2919
2920 if (ni == 8) b <<= 2; /* Shift capital flags if no extension */
2921 if ((b & 0x0C) == 0x0C || (b & 0x03) == 0x03) cf |= NS_LFN; /* LFN entry needs to be created if composite capitals */
2922 if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
2923 if (b & 0x01) cf |= NS_EXT; /* NT flag (Extension has small capital letters only) */
2924 if (b & 0x04) cf |= NS_BODY; /* NT flag (Body has small capital letters only) */
2925 }
2926
2927 dp->fn[NSFLAG] = cf; /* SFN is created into dp->fn[] */
2928
2929 return FR_OK;
2930
2931
2932 #else /* FF_USE_LFN : Non-LFN configuration */
2933 BYTE c, d, *sfn;
2934 UINT ni, si, i;
2935 const char *p;
2936
2937 /* Create file name in directory form */
2938 p = *path; sfn = dp->fn;
2939 memset(sfn, ' ', 11);
2940 si = i = 0; ni = 8;
2941 #if FF_FS_RPATH != 0
2942 if (p[si] == '.') { /* Is this a dot entry? */
2943 for (;;) {
2944 c = (BYTE)p[si++];
2945 if (c != '.' || si >= 3) break;
2946 sfn[i++] = c;
2947 }
2948 if (!IsSeparator(c) && c > ' ') return FR_INVALID_NAME;
2949 *path = p + si; /* Return pointer to the next segment */
2950 sfn[NSFLAG] = (c <= ' ') ? NS_LAST | NS_DOT : NS_DOT; /* Set last segment flag if end of the path */
2951 return FR_OK;
2952 }
2953 #endif
2954 for (;;) {
2955 c = (BYTE)p[si++]; /* Get a byte */
2956 if (c <= ' ') break; /* Break if end of the path name */
2957 if (IsSeparator(c)) { /* Break if a separator is found */
2958 while (IsSeparator(p[si])) si++; /* Skip duplicated separator if exist */
2959 break;
2960 }
2961 if (c == '.' || i >= ni) { /* End of body or field overflow? */
2962 if (ni == 11 || c != '.') return FR_INVALID_NAME; /* Field overflow or invalid dot? */
2963 i = 8; ni = 11; /* Enter file extension field */
2964 continue;
2965 }
2966 #if FF_CODE_PAGE == 0
2967 if (ExCvt && c >= 0x80) { /* Is SBC extended character? */
2968 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
2969 }
2970 #elif FF_CODE_PAGE < 900
2971 if (c >= 0x80) { /* Is SBC extended character? */
2972 c = ExCvt[c & 0x7F]; /* To upper SBC extended character */
2973 }
2974 #endif
2975 if (dbc_1st(c)) { /* Check if it is a DBC 1st byte */
2976 d = (BYTE)p[si++]; /* Get 2nd byte */
2977 if (!dbc_2nd(d) || i >= ni - 1) return FR_INVALID_NAME; /* Reject invalid DBC */
2978 sfn[i++] = c;
2979 sfn[i++] = d;
2980 } else { /* SBC */
2981 if (strchr("*+,:;<=>[]|\"\?\x7F", (int)c)) return FR_INVALID_NAME; /* Reject illegal chrs for SFN */
2982 if (IsLower(c)) c -= 0x20; /* To upper */
2983 sfn[i++] = c;
2984 }
2985 }
2986 *path = &p[si]; /* Return pointer to the next segment */
2987 if (i == 0) return FR_INVALID_NAME; /* Reject nul string */
2988
2989 if (sfn[0] == DDEM) sfn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
2990 sfn[NSFLAG] = (c <= ' ' || p[si] <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of the path */
2991
2992 return FR_OK;
2993 #endif /* FF_USE_LFN */
2994 }
2995
2996
2997
2998
2999 /*-----------------------------------------------------------------------*/
3000 /* Follow a file path */
3001 /*-----------------------------------------------------------------------*/
3002
3003 static FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
3004 DIR* dp, /* Directory object to return last directory and found object */
3005 const TCHAR* path /* Full-path string to find a file or directory */
3006 )
3007 {
3008 FRESULT res;
3009 BYTE ns;
3010 FATFS *fs = dp->obj.fs;
3011
3012
3013 #if FF_FS_RPATH != 0
3014 if (!IsSeparator(*path) && (FF_STR_VOLUME_ID != 2 || !IsTerminator(*path))) { /* Without heading separator */
3015 dp->obj.sclust = fs->cdir; /* Start at the current directory */
3016 } else
3017 #endif
3018 { /* With heading separator */
3019 while (IsSeparator(*path)) path++; /* Strip separators */
3020 dp->obj.sclust = 0; /* Start from the root directory */
3021 }
3022 #if FF_FS_EXFAT
3023 dp->obj.n_frag = 0; /* Invalidate last fragment counter of the object */
3024 #if FF_FS_RPATH != 0
3025 if (fs->fs_type == FS_EXFAT && dp->obj.sclust) { /* exFAT: Retrieve the sub-directory's status */
3026 DIR dj;
3027
3028 dp->obj.c_scl = fs->cdc_scl;
3029 dp->obj.c_size = fs->cdc_size;
3030 dp->obj.c_ofs = fs->cdc_ofs;
3031 res = load_obj_xdir(&dj, &dp->obj);
3032 if (res != FR_OK) return res;
3033 dp->obj.objsize = ld_dword(fs->dirbuf + XDIR_FileSize);
3034 dp->obj.stat = fs->dirbuf[XDIR_GenFlags] & 2;
3035 }
3036 #endif
3037 #endif
3038
3039 if ((UINT)*path < ' ') { /* Null path name is the origin directory itself */
3040 dp->fn[NSFLAG] = NS_NONAME;
3041 res = dir_sdi(dp, 0);
3042
3043 } else { /* Follow path */
3044 for (;;) {
3045 res = create_name(dp, &path); /* Get a segment name of the path */
3046 if (res != FR_OK) break;
3047 res = dir_find(dp); /* Find an object with the segment name */
3048 ns = dp->fn[NSFLAG];
3049 if (res != FR_OK) { /* Failed to find the object */
3050 if (res == FR_NO_FILE) { /* Object is not found */
3051 if (FF_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, stay there */
3052 if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
3053 dp->fn[NSFLAG] = NS_NONAME;
3054 res = FR_OK;
3055 } else { /* Could not find the object */
3056 if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
3057 }
3058 }
3059 break;
3060 }
3061 if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
3062 /* Get into the sub-directory */
3063 if (!(dp->obj.attr & AM_DIR)) { /* It is not a sub-directory and cannot follow */
3064 res = FR_NO_PATH; break;
3065 }
3066 #if FF_FS_EXFAT
3067 if (fs->fs_type == FS_EXFAT) { /* Save containing directory information for next dir */
3068 dp->obj.c_scl = dp->obj.sclust;
3069 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
3070 dp->obj.c_ofs = dp->blk_ofs;
3071 init_alloc_info(fs, &dp->obj); /* Open next directory */
3072 } else
3073 #endif
3074 {
3075 dp->obj.sclust = ld_clust(fs, fs->win + dp->dptr % SS(fs)); /* Open next directory */
3076 }
3077 }
3078 }
3079
3080 return res;
3081 }
3082
3083
3084
3085
3086 /*-----------------------------------------------------------------------*/
3087 /* Get logical drive number from path name */
3088 /*-----------------------------------------------------------------------*/
3089
3090 static int get_ldnumber ( /* Returns logical drive number (-1:invalid drive number or null pointer) */
3091 const TCHAR** path /* Pointer to pointer to the path name */
3092 )
3093 {
3094 const TCHAR *tp, *tt;
3095 TCHAR tc;
3096 int i;
3097 int vol = -1;
3098 #if FF_STR_VOLUME_ID /* Find string volume ID */
3099 const char *sp;
3100 char c;
3101 #endif
3102
3103 tt = tp = *path;
3104 if (!tp) return vol; /* Invalid path name? */
3105 do tc = *tt++; while (!IsTerminator(tc) && tc != ':'); /* Find a colon in the path */
3106
3107 if (tc == ':') { /* DOS/Windows style volume ID? */
3108 i = FF_VOLUMES;
3109 if (IsDigit(*tp) && tp + 2 == tt) { /* Is there a numeric volume ID + colon? */
3110 i = (int)*tp - '0'; /* Get the LD number */
3111 }
3112 #if FF_STR_VOLUME_ID == 1 /* Arbitrary string is enabled */
3113 else {
3114 i = 0;
3115 do {
3116 sp = VolumeStr[i]; tp = *path; /* This string volume ID and path name */
3117 do { /* Compare the volume ID with path name */
3118 c = *sp++; tc = *tp++;
3119 if (IsLower(c)) c -= 0x20;
3120 if (IsLower(tc)) tc -= 0x20;
3121 } while (c && (TCHAR)c == tc);
3122 } while ((c || tp != tt) && ++i < FF_VOLUMES); /* Repeat for each id until pattern match */
3123 }
3124 #endif
3125 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3126 vol = i; /* Drive number */
3127 *path = tt; /* Snip the drive prefix off */
3128 }
3129 return vol;
3130 }
3131 #if FF_STR_VOLUME_ID == 2 /* Unix style volume ID is enabled */
3132 if (*tp == '/') { /* Is there a volume ID? */
3133 while (*(tp + 1) == '/') tp++; /* Skip duplicated separator */
3134 i = 0;
3135 do {
3136 tt = tp; sp = VolumeStr[i]; /* Path name and this string volume ID */
3137 do { /* Compare the volume ID with path name */
3138 c = *sp++; tc = *(++tt);
3139 if (IsLower(c)) c -= 0x20;
3140 if (IsLower(tc)) tc -= 0x20;
3141 } while (c && (TCHAR)c == tc);
3142 } while ((c || (tc != '/' && !IsTerminator(tc))) && ++i < FF_VOLUMES); /* Repeat for each ID until pattern match */
3143 if (i < FF_VOLUMES) { /* If a volume ID is found, get the drive number and strip it */
3144 vol = i; /* Drive number */
3145 *path = tt; /* Snip the drive prefix off */
3146 }
3147 return vol;
3148 }
3149 #endif
3150 /* No drive prefix is found */
3151 #if FF_FS_RPATH != 0
3152 vol = CurrVol; /* Default drive is current drive */
3153 #else
3154 vol = 0; /* Default drive is 0 */
3155 #endif
3156 return vol; /* Return the default drive */
3157 }
3158
3159
3160
3161
3162 /*-----------------------------------------------------------------------*/
3163 /* GPT support functions */
3164 /*-----------------------------------------------------------------------*/
3165
3166 #if FF_LBA64
3167
3168 /* Calculate CRC32 in byte-by-byte */
3169
3170 static DWORD crc32 ( /* Returns next CRC value */
3171 DWORD crc, /* Current CRC value */
3172 BYTE d /* A byte to be processed */
3173 )
3174 {
3175 BYTE b;
3176
3177
3178 for (b = 1; b; b <<= 1) {
3179 crc ^= (d & b) ? 1 : 0;
3180 crc = (crc & 1) ? crc >> 1 ^ 0xEDB88320 : crc >> 1;
3181 }
3182 return crc;
3183 }
3184
3185
3186 /* Check validity of GPT header */
3187
3188 static int test_gpt_header ( /* 0:Invalid, 1:Valid */
3189 const BYTE* gpth /* Pointer to the GPT header */
3190 )
3191 {
3192 UINT i;
3193 DWORD bcc;
3194
3195
3196 if (memcmp(gpth + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16)) return 0; /* Check sign, version (1.0) and length (92) */
3197 for (i = 0, bcc = 0xFFFFFFFF; i < 92; i++) { /* Check header BCC */
3198 bcc = crc32(bcc, i - GPTH_Bcc < 4 ? 0 : gpth[i]);
3199 }
3200 if (~bcc != ld_dword(gpth + GPTH_Bcc)) return 0;
3201 if (ld_dword(gpth + GPTH_PteSize) != SZ_GPTE) return 0; /* Table entry size (must be SZ_GPTE bytes) */
3202 if (ld_dword(gpth + GPTH_PtNum) > 128) return 0; /* Table size (must be 128 entries or less) */
3203
3204 return 1;
3205 }
3206
3207 #if !FF_FS_READONLY && FF_USE_MKFS
3208
3209 /* Generate random value */
3210 static DWORD make_rand (
3211 DWORD seed, /* Seed value */
3212 BYTE* buff, /* Output buffer */
3213 UINT n /* Data length */
3214 )
3215 {
3216 UINT r;
3217
3218
3219 if (seed == 0) seed = 1;
3220 do {
3221 for (r = 0; r < 8; r++) seed = seed & 1 ? seed >> 1 ^ 0xA3000000 : seed >> 1; /* Shift 8 bits the 32-bit LFSR */
3222 *buff++ = (BYTE)seed;
3223 } while (--n);
3224 return seed;
3225 }
3226
3227 #endif
3228 #endif
3229
3230
3231
3232 /*-----------------------------------------------------------------------*/
3233 /* Load a sector and check if it is an FAT VBR */
3234 /*-----------------------------------------------------------------------*/
3235
3236 /* Check what the sector is */
3237
3238 static UINT check_fs ( /* 0:FAT/FAT32 VBR, 1:exFAT VBR, 2:Not FAT and valid BS, 3:Not FAT and invalid BS, 4:Disk error */
3239 FATFS* fs, /* Filesystem object */
3240 LBA_t sect /* Sector to load and check if it is an FAT-VBR or not */
3241 )
3242 {
3243 WORD w, sign;
3244 BYTE b;
3245
3246
3247 fs->wflag = 0; fs->winsect = (LBA_t)0 - 1; /* Invaidate window */
3248 if (move_window(fs, sect) != FR_OK) return 4; /* Load the boot sector */
3249 sign = ld_word(fs->win + BS_55AA);
3250 #if FF_FS_EXFAT
3251 if (sign == 0xAA55 && !memcmp(fs->win + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11)) return 1; /* It is an exFAT VBR */
3252 #endif
3253 b = fs->win[BS_JmpBoot];
3254 if (b == 0xEB || b == 0xE9 || b == 0xE8) { /* Valid JumpBoot code? (short jump, near jump or near call) */
3255 if (sign == 0xAA55 && !memcmp(fs->win + BS_FilSysType32, "FAT32 ", 8)) {
3256 return 0; /* It is an FAT32 VBR */
3257 }
3258 /* FAT volumes formatted with early MS-DOS lack BS_55AA and BS_FilSysType, so FAT VBR needs to be identified without them. */
3259 w = ld_word(fs->win + BPB_BytsPerSec);
3260 b = fs->win[BPB_SecPerClus];
3261 if ((w & (w - 1)) == 0 && w >= FF_MIN_SS && w <= FF_MAX_SS /* Properness of sector size (512-4096 and 2^n) */
3262 && b != 0 && (b & (b - 1)) == 0 /* Properness of cluster size (2^n) */
3263 && ld_word(fs->win + BPB_RsvdSecCnt) != 0 /* Properness of reserved sectors (MNBZ) */
3264 && (UINT)fs->win[BPB_NumFATs] - 1 <= 1 /* Properness of FATs (1 or 2) */
3265 && ld_word(fs->win + BPB_RootEntCnt) != 0 /* Properness of root dir entries (MNBZ) */
3266 && (ld_word(fs->win + BPB_TotSec16) >= 128 || ld_dword(fs->win + BPB_TotSec32) >= 0x10000) /* Properness of volume sectors (>=128) */
3267 && ld_word(fs->win + BPB_FATSz16) != 0) { /* Properness of FAT size (MNBZ) */
3268 return 0; /* It can be presumed an FAT VBR */
3269 }
3270 }
3271 return sign == 0xAA55 ? 2 : 3; /* Not an FAT VBR (valid or invalid BS) */
3272 }
3273
3274
3275 /* Find an FAT volume */
3276 /* (It supports only generic partitioning rules, MBR, GPT and SFD) */
3277
3278 static UINT find_volume ( /* Returns BS status found in the hosting drive */
3279 FATFS* fs, /* Filesystem object */
3280 UINT part /* Partition to fined = 0:auto, 1..:forced */
3281 )
3282 {
3283 UINT fmt, i;
3284 DWORD mbr_pt[4];
3285
3286
3287 fmt = check_fs(fs, 0); /* Load sector 0 and check if it is an FAT VBR as SFD format */
3288 if (fmt != 2 && (fmt >= 3 || part == 0)) return fmt; /* Returns if it is an FAT VBR as auto scan, not a BS or disk error */
3289
3290 /* Sector 0 is not an FAT VBR or forced partition number wants a partition */
3291
3292 #if FF_LBA64
3293 if (fs->win[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
3294 DWORD n_ent, v_ent, ofs;
3295 QWORD pt_lba;
3296
3297 if (move_window(fs, 1) != FR_OK) return 4; /* Load GPT header sector (next to MBR) */
3298 if (!test_gpt_header(fs->win)) return 3; /* Check if GPT header is valid */
3299 n_ent = ld_dword(fs->win + GPTH_PtNum); /* Number of entries */
3300 pt_lba = ld_qword(fs->win + GPTH_PtOfs); /* Table location */
3301 for (v_ent = i = 0; i < n_ent; i++) { /* Find FAT partition */
3302 if (move_window(fs, pt_lba + i * SZ_GPTE / SS(fs)) != FR_OK) return 4; /* PT sector */
3303 ofs = i * SZ_GPTE % SS(fs); /* Offset in the sector */
3304 if (!memcmp(fs->win + ofs + GPTE_PtGuid, GUID_MS_Basic, 16)) { /* MS basic data partition? */
3305 v_ent++;
3306 fmt = check_fs(fs, ld_qword(fs->win + ofs + GPTE_FstLba)); /* Load VBR and check status */
3307 if (part == 0 && fmt <= 1) return fmt; /* Auto search (valid FAT volume found first) */
3308 if (part != 0 && v_ent == part) return fmt; /* Forced partition order (regardless of it is valid or not) */
3309 }
3310 }
3311 return 3; /* Not found */
3312 }
3313 #endif
3314 if (FF_MULTI_PARTITION && part > 4) return 3; /* MBR has 4 partitions max */
3315 for (i = 0; i < 4; i++) { /* Load partition offset in the MBR */
3316 mbr_pt[i] = ld_dword(fs->win + MBR_Table + i * SZ_PTE + PTE_StLba);
3317 }
3318 i = part ? part - 1 : 0; /* Table index to find first */
3319 do { /* Find an FAT volume */
3320 fmt = mbr_pt[i] ? check_fs(fs, mbr_pt[i]) : 3; /* Check if the partition is FAT */
3321 } while (part == 0 && fmt >= 2 && ++i < 4);
3322 return fmt;
3323 }
3324
3325
3326
3327
3328 /*-----------------------------------------------------------------------*/
3329 /* Determine logical drive number and mount the volume if needed */
3330 /*-----------------------------------------------------------------------*/
3331
3332 static FRESULT mount_volume ( /* FR_OK(0): successful, !=0: an error occurred */
3333 const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
3334 FATFS** rfs, /* Pointer to pointer to the found filesystem object */
3335 BYTE mode /* !=0: Check write protection for write access */
3336 )
3337 {
3338 int vol;
3339 DSTATUS stat;
3340 LBA_t bsect;
3341 DWORD tsect, sysect, fasize, nclst, szbfat;
3342 WORD nrsv;
3343 FATFS *fs;
3344 UINT fmt;
3345
3346
3347 /* Get logical drive number */
3348 *rfs = 0;
3349 vol = get_ldnumber(path);
3350 if (vol < 0) return FR_INVALID_DRIVE;
3351
3352 /* Check if the filesystem object is valid or not */
3353 fs = FatFs[vol]; /* Get pointer to the filesystem object */
3354 if (!fs) return FR_NOT_ENABLED; /* Is the filesystem object available? */
3355 #if FF_FS_REENTRANT
3356 if (!lock_fs(fs)) return FR_TIMEOUT; /* Lock the volume */
3357 #endif
3358 *rfs = fs; /* Return pointer to the filesystem object */
3359
3360 mode &= (BYTE)~FA_READ; /* Desired access mode, write access or not */
3361 if (fs->fs_type != 0) { /* If the volume has been mounted */
3362 stat = disk_status(fs->pdrv);
3363 if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
3364 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check write protection if needed */
3365 return FR_WRITE_PROTECTED;
3366 }
3367 return FR_OK; /* The filesystem object is already valid */
3368 }
3369 }
3370
3371 /* The filesystem object is not valid. */
3372 /* Following code attempts to mount the volume. (find an FAT volume, analyze the BPB and initialize the filesystem object) */
3373
3374 fs->fs_type = 0; /* Clear the filesystem object */
3375 fs->pdrv = LD2PD(vol); /* Volume hosting physical drive */
3376 stat = disk_initialize(fs->pdrv); /* Initialize the physical drive */
3377 if (stat & STA_NOINIT) { /* Check if the initialization succeeded */
3378 return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
3379 }
3380 if (!FF_FS_READONLY && mode && (stat & STA_PROTECT)) { /* Check disk write protection if needed */
3381 return FR_WRITE_PROTECTED;
3382 }
3383 #if FF_MAX_SS != FF_MIN_SS /* Get sector size (multiple sector size cfg only) */
3384 if (disk_ioctl(fs->pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK) return FR_DISK_ERR;
3385 if (SS(fs) > FF_MAX_SS || SS(fs) < FF_MIN_SS || (SS(fs) & (SS(fs) - 1))) return FR_DISK_ERR;
3386 #endif
3387
3388 /* Find an FAT volume on the drive */
3389 fmt = find_volume(fs, LD2PT(vol));
3390 if (fmt == 4) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
3391 if (fmt >= 2) return FR_NO_FILESYSTEM; /* No FAT volume is found */
3392 bsect = fs->winsect; /* Volume offset */
3393
3394 /* An FAT volume is found (bsect). Following code initializes the filesystem object */
3395
3396 #if FF_FS_EXFAT
3397 if (fmt == 1) {
3398 QWORD maxlba;
3399 DWORD so, cv, bcl, i;
3400
3401 for (i = BPB_ZeroedEx; i < BPB_ZeroedEx + 53 && fs->win[i] == 0; i++) ; /* Check zero filler */
3402 if (i < BPB_ZeroedEx + 53) return FR_NO_FILESYSTEM;
3403
3404 if (ld_word(fs->win + BPB_FSVerEx) != 0x100) return FR_NO_FILESYSTEM; /* Check exFAT version (must be version 1.0) */
3405
3406 if (1 << fs->win[BPB_BytsPerSecEx] != SS(fs)) { /* (BPB_BytsPerSecEx must be equal to the physical sector size) */
3407 return FR_NO_FILESYSTEM;
3408 }
3409
3410 maxlba = ld_qword(fs->win + BPB_TotSecEx) + bsect; /* Last LBA of the volume + 1 */
3411 if (!FF_LBA64 && maxlba >= 0x100000000) return FR_NO_FILESYSTEM; /* (It cannot be accessed in 32-bit LBA) */
3412
3413 fs->fsize = ld_dword(fs->win + BPB_FatSzEx); /* Number of sectors per FAT */
3414
3415 fs->n_fats = fs->win[BPB_NumFATsEx]; /* Number of FATs */
3416 if (fs->n_fats != 1) return FR_NO_FILESYSTEM; /* (Supports only 1 FAT) */
3417
3418 fs->csize = 1 << fs->win[BPB_SecPerClusEx]; /* Cluster size */
3419 if (fs->csize == 0) return FR_NO_FILESYSTEM; /* (Must be 1..32768 sectors) */
3420
3421 nclst = ld_dword(fs->win + BPB_NumClusEx); /* Number of clusters */
3422 if (nclst > MAX_EXFAT) return FR_NO_FILESYSTEM; /* (Too many clusters) */
3423 fs->n_fatent = nclst + 2;
3424
3425 /* Boundaries and Limits */
3426 fs->volbase = bsect;
3427 fs->database = bsect + ld_dword(fs->win + BPB_DataOfsEx);
3428 fs->fatbase = bsect + ld_dword(fs->win + BPB_FatOfsEx);
3429 if (maxlba < (QWORD)fs->database + nclst * fs->csize) return FR_NO_FILESYSTEM; /* (Volume size must not be smaller than the size requiered) */
3430 fs->dirbase = ld_dword(fs->win + BPB_RootClusEx);
3431
3432 /* Get bitmap location and check if it is contiguous (implementation assumption) */
3433 so = i = 0;
3434 for (;;) { /* Find the bitmap entry in the root directory (in only first cluster) */
3435 if (i == 0) {
3436 if (so >= fs->csize) return FR_NO_FILESYSTEM; /* Not found? */
3437 if (move_window(fs, clst2sect(fs, (DWORD)fs->dirbase) + so) != FR_OK) return FR_DISK_ERR;
3438 so++;
3439 }
3440 if (fs->win[i] == ET_BITMAP) break; /* Is it a bitmap entry? */
3441 i = (i + SZDIRE) % SS(fs); /* Next entry */
3442 }
3443 bcl = ld_dword(fs->win + i + 20); /* Bitmap cluster */
3444 if (bcl < 2 || bcl >= fs->n_fatent) return FR_NO_FILESYSTEM; /* (Wrong cluster#) */
3445 fs->bitbase = fs->database + fs->csize * (bcl - 2); /* Bitmap sector */
3446 for (;;) { /* Check if bitmap is contiguous */
3447 if (move_window(fs, fs->fatbase + bcl / (SS(fs) / 4)) != FR_OK) return FR_DISK_ERR;
3448 cv = ld_dword(fs->win + bcl % (SS(fs) / 4) * 4);
3449 if (cv == 0xFFFFFFFF) break; /* Last link? */
3450 if (cv != ++bcl) return FR_NO_FILESYSTEM; /* Fragmented? */
3451 }
3452
3453 #if !FF_FS_READONLY
3454 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3455 #endif
3456 fmt = FS_EXFAT; /* FAT sub-type */
3457 } else
3458 #endif /* FF_FS_EXFAT */
3459 {
3460 if (ld_word(fs->win + BPB_BytsPerSec) != SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_BytsPerSec must be equal to the physical sector size) */
3461
3462 fasize = ld_word(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
3463 if (fasize == 0) fasize = ld_dword(fs->win + BPB_FATSz32);
3464 fs->fsize = fasize;
3465
3466 fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FATs */
3467 if (fs->n_fats != 1 && fs->n_fats != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
3468 fasize *= fs->n_fats; /* Number of sectors for FAT area */
3469
3470 fs->csize = fs->win[BPB_SecPerClus]; /* Cluster size */
3471 if (fs->csize == 0 || (fs->csize & (fs->csize - 1))) return FR_NO_FILESYSTEM; /* (Must be power of 2) */
3472
3473 fs->n_rootdir = ld_word(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
3474 if (fs->n_rootdir % (SS(fs) / SZDIRE)) return FR_NO_FILESYSTEM; /* (Must be sector aligned) */
3475
3476 tsect = ld_word(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
3477 if (tsect == 0) tsect = ld_dword(fs->win + BPB_TotSec32);
3478
3479 nrsv = ld_word(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
3480 if (nrsv == 0) return FR_NO_FILESYSTEM; /* (Must not be 0) */
3481
3482 /* Determine the FAT sub type */
3483 sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZDIRE); /* RSV + FAT + DIR */
3484 if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3485 nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
3486 if (nclst == 0) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
3487 fmt = 0;
3488 if (nclst <= MAX_FAT32) fmt = FS_FAT32;
3489 if (nclst <= MAX_FAT16) fmt = FS_FAT16;
3490 if (nclst <= MAX_FAT12) fmt = FS_FAT12;
3491 if (fmt == 0) return FR_NO_FILESYSTEM;
3492
3493 /* Boundaries and Limits */
3494 fs->n_fatent = nclst + 2; /* Number of FAT entries */
3495 fs->volbase = bsect; /* Volume start sector */
3496 fs->fatbase = bsect + nrsv; /* FAT start sector */
3497 fs->database = bsect + sysect; /* Data start sector */
3498 if (fmt == FS_FAT32) {
3499 if (ld_word(fs->win + BPB_FSVer32) != 0) return FR_NO_FILESYSTEM; /* (Must be FAT32 revision 0.0) */
3500 if (fs->n_rootdir != 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
3501 fs->dirbase = ld_dword(fs->win + BPB_RootClus32); /* Root directory start cluster */
3502 szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
3503 } else {
3504 if (fs->n_rootdir == 0) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
3505 fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
3506 szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
3507 fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
3508 }
3509 if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) return FR_NO_FILESYSTEM; /* (BPB_FATSz must not be less than the size needed) */
3510
3511 #if !FF_FS_READONLY
3512 /* Get FSInfo if available */
3513 fs->last_clst = fs->free_clst = 0xFFFFFFFF; /* Initialize cluster allocation information */
3514 fs->fsi_flag = 0x80;
3515 #if (FF_FS_NOFSINFO & 3) != 3
3516 if (fmt == FS_FAT32 /* Allow to update FSInfo only if BPB_FSInfo32 == 1 */
3517 && ld_word(fs->win + BPB_FSInfo32) == 1
3518 && move_window(fs, bsect + 1) == FR_OK)
3519 {
3520 fs->fsi_flag = 0;
3521 if (ld_word(fs->win + BS_55AA) == 0xAA55 /* Load FSInfo data if available */
3522 && ld_dword(fs->win + FSI_LeadSig) == 0x41615252
3523 && ld_dword(fs->win + FSI_StrucSig) == 0x61417272)
3524 {
3525 #if (FF_FS_NOFSINFO & 1) == 0
3526 fs->free_clst = ld_dword(fs->win + FSI_Free_Count);
3527 #endif
3528 #if (FF_FS_NOFSINFO & 2) == 0
3529 fs->last_clst = ld_dword(fs->win + FSI_Nxt_Free);
3530 #endif
3531 }
3532 }
3533 #endif /* (FF_FS_NOFSINFO & 3) != 3 */
3534 #endif /* !FF_FS_READONLY */
3535 }
3536
3537 fs->fs_type = (BYTE)fmt;/* FAT sub-type */
3538 fs->id = ++Fsid; /* Volume mount ID */
3539 #if FF_USE_LFN == 1
3540 fs->lfnbuf = LfnBuf; /* Static LFN working buffer */
3541 #if FF_FS_EXFAT
3542 fs->dirbuf = DirBuf; /* Static directory block scratchpad buuffer */
3543 #endif
3544 #endif
3545 #if FF_FS_RPATH != 0
3546 fs->cdir = 0; /* Initialize current directory */
3547 #endif
3548 #if FF_FS_LOCK != 0 /* Clear file lock semaphores */
3549 clear_lock(fs);
3550 #endif
3551 return FR_OK;
3552 }
3553
3554
3555
3556
3557 /*-----------------------------------------------------------------------*/
3558 /* Check if the file/directory object is valid or not */
3559 /*-----------------------------------------------------------------------*/
3560
3561 static FRESULT validate ( /* Returns FR_OK or FR_INVALID_OBJECT */
3562 FFOBJID* obj, /* Pointer to the FFOBJID, the 1st member in the FIL/DIR object, to check validity */
3563 FATFS** rfs /* Pointer to pointer to the owner filesystem object to return */
3564 )
3565 {
3566 FRESULT res = FR_INVALID_OBJECT;
3567
3568
3569 if (obj && obj->fs && obj->fs->fs_type && obj->id == obj->fs->id) { /* Test if the object is valid */
3570 #if FF_FS_REENTRANT
3571 if (lock_fs(obj->fs)) { /* Obtain the filesystem object */
3572 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3573 res = FR_OK;
3574 } else {
3575 unlock_fs(obj->fs, FR_OK);
3576 }
3577 } else {
3578 res = FR_TIMEOUT;
3579 }
3580 #else
3581 if (!(disk_status(obj->fs->pdrv) & STA_NOINIT)) { /* Test if the phsical drive is kept initialized */
3582 res = FR_OK;
3583 }
3584 #endif
3585 }
3586 *rfs = (res == FR_OK) ? obj->fs : 0; /* Corresponding filesystem object */
3587 return res;
3588 }
3589
3590
3591
3592
3593 /*---------------------------------------------------------------------------
3594
3595 Public Functions (FatFs API)
3596
3597 ----------------------------------------------------------------------------*/
3598
3599
3600
3601 /*-----------------------------------------------------------------------*/
3602 /* Mount/Unmount a Logical Drive */
3603 /*-----------------------------------------------------------------------*/
3604
3605 FRESULT f_mount (
3606 FATFS* fs, /* Pointer to the filesystem object to be registered (NULL:unmount)*/
3607 const TCHAR* path, /* Logical drive number to be mounted/unmounted */
3608 BYTE opt /* Mount option: 0=Do not mount (delayed mount), 1=Mount immediately */
3609 )
3610 {
3611 FATFS *cfs;
3612 int vol;
3613 FRESULT res;
3614 const TCHAR *rp = path;
3615
3616
3617 /* Get logical drive number */
3618 vol = get_ldnumber(&rp);
3619 if (vol < 0) return FR_INVALID_DRIVE;
3620 cfs = FatFs[vol]; /* Pointer to fs object */
3621
3622 if (cfs) {
3623 #if FF_FS_LOCK != 0
3624 clear_lock(cfs);
3625 #endif
3626 #if FF_FS_REENTRANT /* Discard sync object of the current volume */
3627 if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
3628 #endif
3629 cfs->fs_type = 0; /* Clear old fs object */
3630 }
3631
3632 if (fs) {
3633 fs->fs_type = 0; /* Clear new fs object */
3634 #if FF_FS_REENTRANT /* Create sync object for the new volume */
3635 if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
3636 #endif
3637 }
3638 FatFs[vol] = fs; /* Register new fs object */
3639
3640 if (opt == 0) return FR_OK; /* Do not mount now, it will be mounted later */
3641
3642 res = mount_volume(&path, &fs, 0); /* Force mounted the volume */
3643 LEAVE_FF(fs, res);
3644 }
3645
3646
3647
3648
3649 /*-----------------------------------------------------------------------*/
3650 /* Open or Create a File */
3651 /*-----------------------------------------------------------------------*/
3652
3653 FRESULT f_open (
3654 FIL* fp, /* Pointer to the blank file object */
3655 const TCHAR* path, /* Pointer to the file name */
3656 BYTE mode /* Access mode and open mode flags */
3657 )
3658 {
3659 FRESULT res;
3660 DIR dj;
3661 FATFS *fs;
3662 #if !FF_FS_READONLY
3663 DWORD cl, bcs, clst, tm;
3664 LBA_t sc;
3665 FSIZE_t ofs;
3666 #endif
3667 DEF_NAMBUF
3668
3669
3670 if (!fp) return FR_INVALID_OBJECT;
3671
3672 /* Get logical drive number */
3673 mode &= FF_FS_READONLY ? FA_READ : FA_READ | FA_WRITE | FA_CREATE_ALWAYS | FA_CREATE_NEW | FA_OPEN_ALWAYS | FA_OPEN_APPEND;
3674 res = mount_volume(&path, &fs, mode);
3675 if (res == FR_OK) {
3676 dj.obj.fs = fs;
3677 INIT_NAMBUF(fs);
3678 res = follow_path(&dj, path); /* Follow the file path */
3679 #if !FF_FS_READONLY /* Read/Write configuration */
3680 if (res == FR_OK) {
3681 if (dj.fn[NSFLAG] & NS_NONAME) { /* Origin directory itself? */
3682 res = FR_INVALID_NAME;
3683 }
3684 #if FF_FS_LOCK != 0
3685 else {
3686 res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Check if the file can be used */
3687 }
3688 #endif
3689 }
3690 /* Create or Open a file */
3691 if (mode & (FA_CREATE_ALWAYS | FA_OPEN_ALWAYS | FA_CREATE_NEW)) {
3692 if (res != FR_OK) { /* No file, create new */
3693 if (res == FR_NO_FILE) { /* There is no file to open, create a new entry */
3694 #if FF_FS_LOCK != 0
3695 res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
3696 #else
3697 res = dir_register(&dj);
3698 #endif
3699 }
3700 mode |= FA_CREATE_ALWAYS; /* File is created */
3701 }
3702 else { /* Any object with the same name is already existing */
3703 if (dj.obj.attr & (AM_RDO | AM_DIR)) { /* Cannot overwrite it (R/O or DIR) */
3704 res = FR_DENIED;
3705 } else {
3706 if (mode & FA_CREATE_NEW) res = FR_EXIST; /* Cannot create as new file */
3707 }
3708 }
3709 if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate the file if overwrite mode */
3710 #if FF_FS_EXFAT
3711 if (fs->fs_type == FS_EXFAT) {
3712 /* Get current allocation info */
3713 fp->obj.fs = fs;
3714 init_alloc_info(fs, &fp->obj);
3715 /* Set directory entry block initial state */
3716 memset(fs->dirbuf + 2, 0, 30); /* Clear 85 entry except for NumSec */
3717 memset(fs->dirbuf + 38, 0, 26); /* Clear C0 entry except for NumName and NameHash */
3718 fs->dirbuf[XDIR_Attr] = AM_ARC;
3719 st_dword(fs->dirbuf + XDIR_CrtTime, GET_FATTIME());
3720 fs->dirbuf[XDIR_GenFlags] = 1;
3721 res = store_xdir(&dj);
3722 if (res == FR_OK && fp->obj.sclust != 0) { /* Remove the cluster chain if exist */
3723 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
3724 fs->last_clst = fp->obj.sclust - 1; /* Reuse the cluster hole */
3725 }
3726 } else
3727 #endif
3728 {
3729 /* Set directory entry initial state */
3730 tm = GET_FATTIME(); /* Set created time */
3731 st_dword(dj.dir + DIR_CrtTime, tm);
3732 st_dword(dj.dir + DIR_ModTime, tm);
3733 cl = ld_clust(fs, dj.dir); /* Get current cluster chain */
3734 dj.dir[DIR_Attr] = AM_ARC; /* Reset attribute */
3735 st_clust(fs, dj.dir, 0); /* Reset file allocation info */
3736 st_dword(dj.dir + DIR_FileSize, 0);
3737 fs->wflag = 1;
3738 if (cl != 0) { /* Remove the cluster chain if exist */
3739 sc = fs->winsect;
3740 res = remove_chain(&dj.obj, cl, 0);
3741 if (res == FR_OK) {
3742 res = move_window(fs, sc);
3743 fs->last_clst = cl - 1; /* Reuse the cluster hole */
3744 }
3745 }
3746 }
3747 }
3748 }
3749 else { /* Open an existing file */
3750 if (res == FR_OK) { /* Is the object exsiting? */
3751 if (dj.obj.attr & AM_DIR) { /* File open against a directory */
3752 res = FR_NO_FILE;
3753 } else {
3754 if ((mode & FA_WRITE) && (dj.obj.attr & AM_RDO)) { /* Write mode open against R/O file */
3755 res = FR_DENIED;
3756 }
3757 }
3758 }
3759 }
3760 if (res == FR_OK) {
3761 if (mode & FA_CREATE_ALWAYS) mode |= FA_MODIFIED; /* Set file change flag if created or overwritten */
3762 fp->dir_sect = fs->winsect; /* Pointer to the directory entry */
3763 fp->dir_ptr = dj.dir;
3764 #if FF_FS_LOCK != 0
3765 fp->obj.lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0); /* Lock the file for this session */
3766 if (fp->obj.lockid == 0) res = FR_INT_ERR;
3767 #endif
3768 }
3769 #else /* R/O configuration */
3770 if (res == FR_OK) {
3771 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it origin directory itself? */
3772 res = FR_INVALID_NAME;
3773 } else {
3774 if (dj.obj.attr & AM_DIR) { /* Is it a directory? */
3775 res = FR_NO_FILE;
3776 }
3777 }
3778 }
3779 #endif
3780
3781 if (res == FR_OK) {
3782 #if FF_FS_EXFAT
3783 if (fs->fs_type == FS_EXFAT) {
3784 fp->obj.c_scl = dj.obj.sclust; /* Get containing directory info */
3785 fp->obj.c_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
3786 fp->obj.c_ofs = dj.blk_ofs;
3787 init_alloc_info(fs, &fp->obj);
3788 } else
3789 #endif
3790 {
3791 fp->obj.sclust = ld_clust(fs, dj.dir); /* Get object allocation info */
3792 fp->obj.objsize = ld_dword(dj.dir + DIR_FileSize);
3793 }
3794 #if FF_USE_FASTSEEK
3795 fp->cltbl = 0; /* Disable fast seek mode */
3796 #endif
3797 fp->obj.fs = fs; /* Validate the file object */
3798 fp->obj.id = fs->id;
3799 fp->flag = mode; /* Set file access mode */
3800 fp->err = 0; /* Clear error flag */
3801 fp->sect = 0; /* Invalidate current data sector */
3802 fp->fptr = 0; /* Set file pointer top of the file */
3803 #if !FF_FS_READONLY
3804 #if !FF_FS_TINY
3805 memset(fp->buf, 0, sizeof fp->buf); /* Clear sector buffer */
3806 #endif
3807 if ((mode & FA_SEEKEND) && fp->obj.objsize > 0) { /* Seek to end of file if FA_OPEN_APPEND is specified */
3808 fp->fptr = fp->obj.objsize; /* Offset to seek */
3809 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size in byte */
3810 clst = fp->obj.sclust; /* Follow the cluster chain */
3811 for (ofs = fp->obj.objsize; res == FR_OK && ofs > bcs; ofs -= bcs) {
3812 clst = get_fat(&fp->obj, clst);
3813 if (clst <= 1) res = FR_INT_ERR;
3814 if (clst == 0xFFFFFFFF) res = FR_DISK_ERR;
3815 }
3816 fp->clust = clst;
3817 if (res == FR_OK && ofs % SS(fs)) { /* Fill sector buffer if not on the sector boundary */
3818 sc = clst2sect(fs, clst);
3819 if (sc == 0) {
3820 res = FR_INT_ERR;
3821 } else {
3822 fp->sect = sc + (DWORD)(ofs / SS(fs));
3823 #if !FF_FS_TINY
3824 if (disk_read(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) res = FR_DISK_ERR;
3825 #endif
3826 }
3827 }
3828 #if FF_FS_LOCK != 0
3829 if (res != FR_OK) dec_lock(fp->obj.lockid); /* Decrement file open counter if seek failed */
3830 #endif
3831 }
3832 #endif
3833 }
3834
3835 FREE_NAMBUF();
3836 }
3837
3838 if (res != FR_OK) fp->obj.fs = 0; /* Invalidate file object on error */
3839
3840 LEAVE_FF(fs, res);
3841 }
3842
3843
3844
3845
3846 /*-----------------------------------------------------------------------*/
3847 /* Read File */
3848 /*-----------------------------------------------------------------------*/
3849
3850 FRESULT f_read (
3851 FIL* fp, /* Open file to be read */
3852 void* buff, /* Data buffer to store the read data */
3853 UINT btr, /* Number of bytes to read */
3854 UINT* br /* Number of bytes read */
3855 )
3856 {
3857 FRESULT res;
3858 FATFS *fs;
3859 DWORD clst;
3860 LBA_t sect;
3861 FSIZE_t remain;
3862 UINT rcnt, cc, csect;
3863 BYTE *rbuff = (BYTE*)buff;
3864
3865
3866 *br = 0; /* Clear read byte counter */
3867 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3868 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3869 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3870 remain = fp->obj.objsize - fp->fptr;
3871 if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
3872
3873 for ( ; btr > 0; btr -= rcnt, *br += rcnt, rbuff += rcnt, fp->fptr += rcnt) { /* Repeat until btr bytes read */
3874 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3875 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
3876 if (csect == 0) { /* On the cluster boundary? */
3877 if (fp->fptr == 0) { /* On the top of the file? */
3878 clst = fp->obj.sclust; /* Follow cluster chain from the origin */
3879 } else { /* Middle or end of the file */
3880 #if FF_USE_FASTSEEK
3881 if (fp->cltbl) {
3882 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3883 } else
3884 #endif
3885 {
3886 clst = get_fat(&fp->obj, fp->clust); /* Follow cluster chain on the FAT */
3887 }
3888 }
3889 if (clst < 2) ABORT(fs, FR_INT_ERR);
3890 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3891 fp->clust = clst; /* Update current cluster */
3892 }
3893 sect = clst2sect(fs, fp->clust); /* Get current sector */
3894 if (sect == 0) ABORT(fs, FR_INT_ERR);
3895 sect += csect;
3896 cc = btr / SS(fs); /* When remaining bytes >= sector size, */
3897 if (cc > 0) { /* Read maximum contiguous sectors directly */
3898 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
3899 cc = fs->csize - csect;
3900 }
3901 if (disk_read(fs->pdrv, rbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
3902 #if !FF_FS_READONLY && FF_FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
3903 #if FF_FS_TINY
3904 if (fs->wflag && fs->winsect - sect < cc) {
3905 memcpy(rbuff + ((fs->winsect - sect) * SS(fs)), fs->win, SS(fs));
3906 }
3907 #else
3908 if ((fp->flag & FA_DIRTY) && fp->sect - sect < cc) {
3909 memcpy(rbuff + ((fp->sect - sect) * SS(fs)), fp->buf, SS(fs));
3910 }
3911 #endif
3912 #endif
3913 rcnt = SS(fs) * cc; /* Number of bytes transferred */
3914 continue;
3915 }
3916 #if !FF_FS_TINY
3917 if (fp->sect != sect) { /* Load data sector if not in cache */
3918 #if !FF_FS_READONLY
3919 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
3920 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
3921 fp->flag &= (BYTE)~FA_DIRTY;
3922 }
3923 #endif
3924 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
3925 }
3926 #endif
3927 fp->sect = sect;
3928 }
3929 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
3930 if (rcnt > btr) rcnt = btr; /* Clip it by btr if needed */
3931 #if FF_FS_TINY
3932 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
3933 memcpy(rbuff, fs->win + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3934 #else
3935 memcpy(rbuff, fp->buf + fp->fptr % SS(fs), rcnt); /* Extract partial sector */
3936 #endif
3937 }
3938
3939 LEAVE_FF(fs, FR_OK);
3940 }
3941
3942
3943
3944
3945 #if !FF_FS_READONLY
3946 /*-----------------------------------------------------------------------*/
3947 /* Write File */
3948 /*-----------------------------------------------------------------------*/
3949
3950 FRESULT f_write (
3951 FIL* fp, /* Open file to be written */
3952 const void* buff, /* Data to be written */
3953 UINT btw, /* Number of bytes to write */
3954 UINT* bw /* Number of bytes written */
3955 )
3956 {
3957 FRESULT res;
3958 FATFS *fs;
3959 DWORD clst;
3960 LBA_t sect;
3961 UINT wcnt, cc, csect;
3962 const BYTE *wbuff = (const BYTE*)buff;
3963
3964
3965 *bw = 0; /* Clear write byte counter */
3966 res = validate(&fp->obj, &fs); /* Check validity of the file object */
3967 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res); /* Check validity */
3968 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
3969
3970 /* Check fptr wrap-around (file size cannot reach 4 GiB at FAT volume) */
3971 if ((!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) && (DWORD)(fp->fptr + btw) < (DWORD)fp->fptr) {
3972 btw = (UINT)(0xFFFFFFFF - (DWORD)fp->fptr);
3973 }
3974
3975 for ( ; btw > 0; btw -= wcnt, *bw += wcnt, wbuff += wcnt, fp->fptr += wcnt, fp->obj.objsize = (fp->fptr > fp->obj.objsize) ? fp->fptr : fp->obj.objsize) { /* Repeat until all data written */
3976 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
3977 csect = (UINT)(fp->fptr / SS(fs)) & (fs->csize - 1); /* Sector offset in the cluster */
3978 if (csect == 0) { /* On the cluster boundary? */
3979 if (fp->fptr == 0) { /* On the top of the file? */
3980 clst = fp->obj.sclust; /* Follow from the origin */
3981 if (clst == 0) { /* If no cluster is allocated, */
3982 clst = create_chain(&fp->obj, 0); /* create a new cluster chain */
3983 }
3984 } else { /* On the middle or end of the file */
3985 #if FF_USE_FASTSEEK
3986 if (fp->cltbl) {
3987 clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
3988 } else
3989 #endif
3990 {
3991 clst = create_chain(&fp->obj, fp->clust); /* Follow or stretch cluster chain on the FAT */
3992 }
3993 }
3994 if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
3995 if (clst == 1) ABORT(fs, FR_INT_ERR);
3996 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
3997 fp->clust = clst; /* Update current cluster */
3998 if (fp->obj.sclust == 0) fp->obj.sclust = clst; /* Set start cluster if the first write */
3999 }
4000 #if FF_FS_TINY
4001 if (fs->winsect == fp->sect && sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Write-back sector cache */
4002 #else
4003 if (fp->flag & FA_DIRTY) { /* Write-back sector cache */
4004 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4005 fp->flag &= (BYTE)~FA_DIRTY;
4006 }
4007 #endif
4008 sect = clst2sect(fs, fp->clust); /* Get current sector */
4009 if (sect == 0) ABORT(fs, FR_INT_ERR);
4010 sect += csect;
4011 cc = btw / SS(fs); /* When remaining bytes >= sector size, */
4012 if (cc > 0) { /* Write maximum contiguous sectors directly */
4013 if (csect + cc > fs->csize) { /* Clip at cluster boundary */
4014 cc = fs->csize - csect;
4015 }
4016 if (disk_write(fs->pdrv, wbuff, sect, cc) != RES_OK) ABORT(fs, FR_DISK_ERR);
4017 #if FF_FS_MINIMIZE <= 2
4018 #if FF_FS_TINY
4019 if (fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4020 memcpy(fs->win, wbuff + ((fs->winsect - sect) * SS(fs)), SS(fs));
4021 fs->wflag = 0;
4022 }
4023 #else
4024 if (fp->sect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
4025 memcpy(fp->buf, wbuff + ((fp->sect - sect) * SS(fs)), SS(fs));
4026 fp->flag &= (BYTE)~FA_DIRTY;
4027 }
4028 #endif
4029 #endif
4030 wcnt = SS(fs) * cc; /* Number of bytes transferred */
4031 continue;
4032 }
4033 #if FF_FS_TINY
4034 if (fp->fptr >= fp->obj.objsize) { /* Avoid silly cache filling on the growing edge */
4035 if (sync_window(fs) != FR_OK) ABORT(fs, FR_DISK_ERR);
4036 fs->winsect = sect;
4037 }
4038 #else
4039 if (fp->sect != sect && /* Fill sector cache with file data */
4040 fp->fptr < fp->obj.objsize &&
4041 disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) {
4042 ABORT(fs, FR_DISK_ERR);
4043 }
4044 #endif
4045 fp->sect = sect;
4046 }
4047 wcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
4048 if (wcnt > btw) wcnt = btw; /* Clip it by btw if needed */
4049 #if FF_FS_TINY
4050 if (move_window(fs, fp->sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window */
4051 memcpy(fs->win + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4052 fs->wflag = 1;
4053 #else
4054 memcpy(fp->buf + fp->fptr % SS(fs), wbuff, wcnt); /* Fit data to the sector */
4055 fp->flag |= FA_DIRTY;
4056 #endif
4057 }
4058
4059 fp->flag |= FA_MODIFIED; /* Set file change flag */
4060
4061 LEAVE_FF(fs, FR_OK);
4062 }
4063
4064
4065
4066
4067 /*-----------------------------------------------------------------------*/
4068 /* Synchronize the File */
4069 /*-----------------------------------------------------------------------*/
4070
4071 FRESULT f_sync (
4072 FIL* fp /* Open file to be synced */
4073 )
4074 {
4075 FRESULT res;
4076 FATFS *fs;
4077 DWORD tm;
4078 BYTE *dir;
4079
4080
4081 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4082 if (res == FR_OK) {
4083 if (fp->flag & FA_MODIFIED) { /* Is there any change to the file? */
4084 #if !FF_FS_TINY
4085 if (fp->flag & FA_DIRTY) { /* Write-back cached data if needed */
4086 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) LEAVE_FF(fs, FR_DISK_ERR);
4087 fp->flag &= (BYTE)~FA_DIRTY;
4088 }
4089 #endif
4090 /* Update the directory entry */
4091 tm = GET_FATTIME(); /* Modified time */
4092 #if FF_FS_EXFAT
4093 if (fs->fs_type == FS_EXFAT) {
4094 res = fill_first_frag(&fp->obj); /* Fill first fragment on the FAT if needed */
4095 if (res == FR_OK) {
4096 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4097 }
4098 if (res == FR_OK) {
4099 DIR dj;
4100 DEF_NAMBUF
4101
4102 INIT_NAMBUF(fs);
4103 res = load_obj_xdir(&dj, &fp->obj); /* Load directory entry block */
4104 if (res == FR_OK) {
4105 fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4106 fs->dirbuf[XDIR_GenFlags] = fp->obj.stat | 1; /* Update file allocation information */
4107 st_dword(fs->dirbuf + XDIR_FstClus, fp->obj.sclust); /* Update start cluster */
4108 st_qword(fs->dirbuf + XDIR_FileSize, fp->obj.objsize); /* Update file size */
4109 st_qword(fs->dirbuf + XDIR_ValidFileSize, fp->obj.objsize); /* (FatFs does not support Valid File Size feature) */
4110 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Update modified time */
4111 fs->dirbuf[XDIR_ModTime10] = 0;
4112 st_dword(fs->dirbuf + XDIR_AccTime, 0);
4113 res = store_xdir(&dj); /* Restore it to the directory */
4114 if (res == FR_OK) {
4115 res = sync_fs(fs);
4116 fp->flag &= (BYTE)~FA_MODIFIED;
4117 }
4118 }
4119 FREE_NAMBUF();
4120 }
4121 } else
4122 #endif
4123 {
4124 res = move_window(fs, fp->dir_sect);
4125 if (res == FR_OK) {
4126 dir = fp->dir_ptr;
4127 dir[DIR_Attr] |= AM_ARC; /* Set archive attribute to indicate that the file has been changed */
4128 st_clust(fp->obj.fs, dir, fp->obj.sclust); /* Update file allocation information */
4129 st_dword(dir + DIR_FileSize, (DWORD)fp->obj.objsize); /* Update file size */
4130 st_dword(dir + DIR_ModTime, tm); /* Update modified time */
4131 st_word(dir + DIR_LstAccDate, 0);
4132 fs->wflag = 1;
4133 res = sync_fs(fs); /* Restore it to the directory */
4134 fp->flag &= (BYTE)~FA_MODIFIED;
4135 }
4136 }
4137 }
4138 }
4139
4140 LEAVE_FF(fs, res);
4141 }
4142
4143 #endif /* !FF_FS_READONLY */
4144
4145
4146
4147
4148 /*-----------------------------------------------------------------------*/
4149 /* Close File */
4150 /*-----------------------------------------------------------------------*/
4151
4152 FRESULT f_close (
4153 FIL* fp /* Open file to be closed */
4154 )
4155 {
4156 FRESULT res;
4157 FATFS *fs;
4158
4159 #if !FF_FS_READONLY
4160 res = f_sync(fp); /* Flush cached data */
4161 if (res == FR_OK)
4162 #endif
4163 {
4164 res = validate(&fp->obj, &fs); /* Lock volume */
4165 if (res == FR_OK) {
4166 #if FF_FS_LOCK != 0
4167 res = dec_lock(fp->obj.lockid); /* Decrement file open counter */
4168 if (res == FR_OK) fp->obj.fs = 0; /* Invalidate file object */
4169 #else
4170 fp->obj.fs = 0; /* Invalidate file object */
4171 #endif
4172 #if FF_FS_REENTRANT
4173 unlock_fs(fs, FR_OK); /* Unlock volume */
4174 #endif
4175 }
4176 }
4177 return res;
4178 }
4179
4180
4181
4182
4183 #if FF_FS_RPATH >= 1
4184 /*-----------------------------------------------------------------------*/
4185 /* Change Current Directory or Current Drive, Get Current Directory */
4186 /*-----------------------------------------------------------------------*/
4187
4188 FRESULT f_chdrive (
4189 const TCHAR* path /* Drive number to set */
4190 )
4191 {
4192 int vol;
4193
4194
4195 /* Get logical drive number */
4196 vol = get_ldnumber(&path);
4197 if (vol < 0) return FR_INVALID_DRIVE;
4198 CurrVol = (BYTE)vol; /* Set it as current volume */
4199
4200 return FR_OK;
4201 }
4202
4203
4204
4205 FRESULT f_chdir (
4206 const TCHAR* path /* Pointer to the directory path */
4207 )
4208 {
4209 #if FF_STR_VOLUME_ID == 2
4210 UINT i;
4211 #endif
4212 FRESULT res;
4213 DIR dj;
4214 FATFS *fs;
4215 DEF_NAMBUF
4216
4217
4218 /* Get logical drive */
4219 res = mount_volume(&path, &fs, 0);
4220 if (res == FR_OK) {
4221 dj.obj.fs = fs;
4222 INIT_NAMBUF(fs);
4223 res = follow_path(&dj, path); /* Follow the path */
4224 if (res == FR_OK) { /* Follow completed */
4225 if (dj.fn[NSFLAG] & NS_NONAME) { /* Is it the start directory itself? */
4226 fs->cdir = dj.obj.sclust;
4227 #if FF_FS_EXFAT
4228 if (fs->fs_type == FS_EXFAT) {
4229 fs->cdc_scl = dj.obj.c_scl;
4230 fs->cdc_size = dj.obj.c_size;
4231 fs->cdc_ofs = dj.obj.c_ofs;
4232 }
4233 #endif
4234 } else {
4235 if (dj.obj.attr & AM_DIR) { /* It is a sub-directory */
4236 #if FF_FS_EXFAT
4237 if (fs->fs_type == FS_EXFAT) {
4238 fs->cdir = ld_dword(fs->dirbuf + XDIR_FstClus); /* Sub-directory cluster */
4239 fs->cdc_scl = dj.obj.sclust; /* Save containing directory information */
4240 fs->cdc_size = ((DWORD)dj.obj.objsize & 0xFFFFFF00) | dj.obj.stat;
4241 fs->cdc_ofs = dj.blk_ofs;
4242 } else
4243 #endif
4244 {
4245 fs->cdir = ld_clust(fs, dj.dir); /* Sub-directory cluster */
4246 }
4247 } else {
4248 res = FR_NO_PATH; /* Reached but a file */
4249 }
4250 }
4251 }
4252 FREE_NAMBUF();
4253 if (res == FR_NO_FILE) res = FR_NO_PATH;
4254 #if FF_STR_VOLUME_ID == 2 /* Also current drive is changed if in Unix style volume ID */
4255 if (res == FR_OK) {
4256 for (i = FF_VOLUMES - 1; i && fs != FatFs[i]; i--) ; /* Set current drive */
4257 CurrVol = (BYTE)i;
4258 }
4259 #endif
4260 }
4261
4262 LEAVE_FF(fs, res);
4263 }
4264
4265
4266 #if FF_FS_RPATH >= 2
4267 FRESULT f_getcwd (
4268 TCHAR* buff, /* Pointer to the directory path */
4269 UINT len /* Size of buff in unit of TCHAR */
4270 )
4271 {
4272 FRESULT res;
4273 DIR dj;
4274 FATFS *fs;
4275 UINT i, n;
4276 DWORD ccl;
4277 TCHAR *tp = buff;
4278 #if FF_VOLUMES >= 2
4279 UINT vl;
4280 #if FF_STR_VOLUME_ID
4281 const char *vp;
4282 #endif
4283 #endif
4284 FILINFO fno;
4285 DEF_NAMBUF
4286
4287
4288 /* Get logical drive */
4289 buff[0] = 0; /* Set null string to get current volume */
4290 res = mount_volume((const TCHAR**)&buff, &fs, 0); /* Get current volume */
4291 if (res == FR_OK) {
4292 dj.obj.fs = fs;
4293 INIT_NAMBUF(fs);
4294
4295 /* Follow parent directories and create the path */
4296 i = len; /* Bottom of buffer (directory stack base) */
4297 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* (Cannot do getcwd on exFAT and returns root path) */
4298 dj.obj.sclust = fs->cdir; /* Start to follow upper directory from current directory */
4299 while ((ccl = dj.obj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
4300 res = dir_sdi(&dj, 1 * SZDIRE); /* Get parent directory */
4301 if (res != FR_OK) break;
4302 res = move_window(fs, dj.sect);
4303 if (res != FR_OK) break;
4304 dj.obj.sclust = ld_clust(fs, dj.dir); /* Goto parent directory */
4305 res = dir_sdi(&dj, 0);
4306 if (res != FR_OK) break;
4307 do { /* Find the entry links to the child directory */
4308 res = DIR_READ_FILE(&dj);
4309 if (res != FR_OK) break;
4310 if (ccl == ld_clust(fs, dj.dir)) break; /* Found the entry */
4311 res = dir_next(&dj, 0);
4312 } while (res == FR_OK);
4313 if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
4314 if (res != FR_OK) break;
4315 get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
4316 for (n = 0; fno.fname[n]; n++) ; /* Name length */
4317 if (i < n + 1) { /* Insufficient space to store the path name? */
4318 res = FR_NOT_ENOUGH_CORE; break;
4319 }
4320 while (n) buff[--i] = fno.fname[--n]; /* Stack the name */
4321 buff[--i] = '/';
4322 }
4323 }
4324 if (res == FR_OK) {
4325 if (i == len) buff[--i] = '/'; /* Is it the root-directory? */
4326 #if FF_VOLUMES >= 2 /* Put drive prefix */
4327 vl = 0;
4328 #if FF_STR_VOLUME_ID >= 1 /* String volume ID */
4329 for (n = 0, vp = (const char*)VolumeStr[CurrVol]; vp[n]; n++) ;
4330 if (i >= n + 2) {
4331 if (FF_STR_VOLUME_ID == 2) *tp++ = (TCHAR)'/';
4332 for (vl = 0; vl < n; *tp++ = (TCHAR)vp[vl], vl++) ;
4333 if (FF_STR_VOLUME_ID == 1) *tp++ = (TCHAR)':';
4334 vl++;
4335 }
4336 #else /* Numeric volume ID */
4337 if (i >= 3) {
4338 *tp++ = (TCHAR)'0' + CurrVol;
4339 *tp++ = (TCHAR)':';
4340 vl = 2;
4341 }
4342 #endif
4343 if (vl == 0) res = FR_NOT_ENOUGH_CORE;
4344 #endif
4345 /* Add current directory path */
4346 if (res == FR_OK) {
4347 do *tp++ = buff[i++]; while (i < len); /* Copy stacked path string */
4348 }
4349 }
4350 FREE_NAMBUF();
4351 }
4352
4353 *tp = 0;
4354 LEAVE_FF(fs, res);
4355 }
4356
4357 #endif /* FF_FS_RPATH >= 2 */
4358 #endif /* FF_FS_RPATH >= 1 */
4359
4360
4361
4362 #if FF_FS_MINIMIZE <= 2
4363 /*-----------------------------------------------------------------------*/
4364 /* Seek File Read/Write Pointer */
4365 /*-----------------------------------------------------------------------*/
4366
4367 FRESULT f_lseek (
4368 FIL* fp, /* Pointer to the file object */
4369 FSIZE_t ofs /* File pointer from top of file */
4370 )
4371 {
4372 FRESULT res;
4373 FATFS *fs;
4374 DWORD clst, bcs;
4375 LBA_t nsect;
4376 FSIZE_t ifptr;
4377 #if FF_USE_FASTSEEK
4378 DWORD cl, pcl, ncl, tcl, tlen, ulen;
4379 DWORD *tbl;
4380 LBA_t dsc;
4381 #endif
4382
4383 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4384 if (res == FR_OK) res = (FRESULT)fp->err;
4385 #if FF_FS_EXFAT && !FF_FS_READONLY
4386 if (res == FR_OK && fs->fs_type == FS_EXFAT) {
4387 res = fill_last_frag(&fp->obj, fp->clust, 0xFFFFFFFF); /* Fill last fragment on the FAT if needed */
4388 }
4389 #endif
4390 if (res != FR_OK) LEAVE_FF(fs, res);
4391
4392 #if FF_USE_FASTSEEK
4393 if (fp->cltbl) { /* Fast seek */
4394 if (ofs == CREATE_LINKMAP) { /* Create CLMT */
4395 tbl = fp->cltbl;
4396 tlen = *tbl++; ulen = 2; /* Given table size and required table size */
4397 cl = fp->obj.sclust; /* Origin of the chain */
4398 if (cl != 0) {
4399 do {
4400 /* Get a fragment */
4401 tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
4402 do {
4403 pcl = cl; ncl++;
4404 cl = get_fat(&fp->obj, cl);
4405 if (cl <= 1) ABORT(fs, FR_INT_ERR);
4406 if (cl == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4407 } while (cl == pcl + 1);
4408 if (ulen <= tlen) { /* Store the length and top of the fragment */
4409 *tbl++ = ncl; *tbl++ = tcl;
4410 }
4411 } while (cl < fs->n_fatent); /* Repeat until end of chain */
4412 }
4413 *fp->cltbl = ulen; /* Number of items used */
4414 if (ulen <= tlen) {
4415 *tbl = 0; /* Terminate table */
4416 } else {
4417 res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
4418 }
4419 } else { /* Fast seek */
4420 if (ofs > fp->obj.objsize) ofs = fp->obj.objsize; /* Clip offset at the file size */
4421 fp->fptr = ofs; /* Set file pointer */
4422 if (ofs > 0) {
4423 fp->clust = clmt_clust(fp, ofs - 1);
4424 dsc = clst2sect(fs, fp->clust);
4425 if (dsc == 0) ABORT(fs, FR_INT_ERR);
4426 dsc += (DWORD)((ofs - 1) / SS(fs)) & (fs->csize - 1);
4427 if (fp->fptr % SS(fs) && dsc != fp->sect) { /* Refill sector cache if needed */
4428 #if !FF_FS_TINY
4429 #if !FF_FS_READONLY
4430 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4431 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4432 fp->flag &= (BYTE)~FA_DIRTY;
4433 }
4434 #endif
4435 if (disk_read(fs->pdrv, fp->buf, dsc, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Load current sector */
4436 #endif
4437 fp->sect = dsc;
4438 }
4439 }
4440 }
4441 } else
4442 #endif
4443
4444 /* Normal Seek */
4445 {
4446 #if FF_FS_EXFAT
4447 if (fs->fs_type != FS_EXFAT && ofs >= 0x100000000) ofs = 0xFFFFFFFF; /* Clip at 4 GiB - 1 if at FATxx */
4448 #endif
4449 if (ofs > fp->obj.objsize && (FF_FS_READONLY || !(fp->flag & FA_WRITE))) { /* In read-only mode, clip offset with the file size */
4450 ofs = fp->obj.objsize;
4451 }
4452 ifptr = fp->fptr;
4453 fp->fptr = nsect = 0;
4454 if (ofs > 0) {
4455 bcs = (DWORD)fs->csize * SS(fs); /* Cluster size (byte) */
4456 if (ifptr > 0 &&
4457 (ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
4458 fp->fptr = (ifptr - 1) & ~(FSIZE_t)(bcs - 1); /* start from the current cluster */
4459 ofs -= fp->fptr;
4460 clst = fp->clust;
4461 } else { /* When seek to back cluster, */
4462 clst = fp->obj.sclust; /* start from the first cluster */
4463 #if !FF_FS_READONLY
4464 if (clst == 0) { /* If no cluster chain, create a new chain */
4465 clst = create_chain(&fp->obj, 0);
4466 if (clst == 1) ABORT(fs, FR_INT_ERR);
4467 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4468 fp->obj.sclust = clst;
4469 }
4470 #endif
4471 fp->clust = clst;
4472 }
4473 if (clst != 0) {
4474 while (ofs > bcs) { /* Cluster following loop */
4475 ofs -= bcs; fp->fptr += bcs;
4476 #if !FF_FS_READONLY
4477 if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
4478 if (FF_FS_EXFAT && fp->fptr > fp->obj.objsize) { /* No FAT chain object needs correct objsize to generate FAT value */
4479 fp->obj.objsize = fp->fptr;
4480 fp->flag |= FA_MODIFIED;
4481 }
4482 clst = create_chain(&fp->obj, clst); /* Follow chain with forceed stretch */
4483 if (clst == 0) { /* Clip file size in case of disk full */
4484 ofs = 0; break;
4485 }
4486 } else
4487 #endif
4488 {
4489 clst = get_fat(&fp->obj, clst); /* Follow cluster chain if not in write mode */
4490 }
4491 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
4492 if (clst <= 1 || clst >= fs->n_fatent) ABORT(fs, FR_INT_ERR);
4493 fp->clust = clst;
4494 }
4495 fp->fptr += ofs;
4496 if (ofs % SS(fs)) {
4497 nsect = clst2sect(fs, clst); /* Current sector */
4498 if (nsect == 0) ABORT(fs, FR_INT_ERR);
4499 nsect += (DWORD)(ofs / SS(fs));
4500 }
4501 }
4502 }
4503 if (!FF_FS_READONLY && fp->fptr > fp->obj.objsize) { /* Set file change flag if the file size is extended */
4504 fp->obj.objsize = fp->fptr;
4505 fp->flag |= FA_MODIFIED;
4506 }
4507 if (fp->fptr % SS(fs) && nsect != fp->sect) { /* Fill sector cache if needed */
4508 #if !FF_FS_TINY
4509 #if !FF_FS_READONLY
4510 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
4511 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
4512 fp->flag &= (BYTE)~FA_DIRTY;
4513 }
4514 #endif
4515 if (disk_read(fs->pdrv, fp->buf, nsect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR); /* Fill sector cache */
4516 #endif
4517 fp->sect = nsect;
4518 }
4519 }
4520
4521 LEAVE_FF(fs, res);
4522 }
4523
4524
4525
4526 #if FF_FS_MINIMIZE <= 1
4527 /*-----------------------------------------------------------------------*/
4528 /* Create a Directory Object */
4529 /*-----------------------------------------------------------------------*/
4530
4531 FRESULT f_opendir (
4532 DIR* dp, /* Pointer to directory object to create */
4533 const TCHAR* path /* Pointer to the directory path */
4534 )
4535 {
4536 FRESULT res;
4537 FATFS *fs;
4538 DEF_NAMBUF
4539
4540
4541 if (!dp) return FR_INVALID_OBJECT;
4542
4543 /* Get logical drive */
4544 res = mount_volume(&path, &fs, 0);
4545 if (res == FR_OK) {
4546 dp->obj.fs = fs;
4547 INIT_NAMBUF(fs);
4548 res = follow_path(dp, path); /* Follow the path to the directory */
4549 if (res == FR_OK) { /* Follow completed */
4550 if (!(dp->fn[NSFLAG] & NS_NONAME)) { /* It is not the origin directory itself */
4551 if (dp->obj.attr & AM_DIR) { /* This object is a sub-directory */
4552 #if FF_FS_EXFAT
4553 if (fs->fs_type == FS_EXFAT) {
4554 dp->obj.c_scl = dp->obj.sclust; /* Get containing directory inforamation */
4555 dp->obj.c_size = ((DWORD)dp->obj.objsize & 0xFFFFFF00) | dp->obj.stat;
4556 dp->obj.c_ofs = dp->blk_ofs;
4557 init_alloc_info(fs, &dp->obj); /* Get object allocation info */
4558 } else
4559 #endif
4560 {
4561 dp->obj.sclust = ld_clust(fs, dp->dir); /* Get object allocation info */
4562 }
4563 } else { /* This object is a file */
4564 res = FR_NO_PATH;
4565 }
4566 }
4567 if (res == FR_OK) {
4568 dp->obj.id = fs->id;
4569 res = dir_sdi(dp, 0); /* Rewind directory */
4570 #if FF_FS_LOCK != 0
4571 if (res == FR_OK) {
4572 if (dp->obj.sclust != 0) {
4573 dp->obj.lockid = inc_lock(dp, 0); /* Lock the sub directory */
4574 if (!dp->obj.lockid) res = FR_TOO_MANY_OPEN_FILES;
4575 } else {
4576 dp->obj.lockid = 0; /* Root directory need not to be locked */
4577 }
4578 }
4579 #endif
4580 }
4581 }
4582 FREE_NAMBUF();
4583 if (res == FR_NO_FILE) res = FR_NO_PATH;
4584 }
4585 if (res != FR_OK) dp->obj.fs = 0; /* Invalidate the directory object if function faild */
4586
4587 LEAVE_FF(fs, res);
4588 }
4589
4590
4591
4592
4593 /*-----------------------------------------------------------------------*/
4594 /* Close Directory */
4595 /*-----------------------------------------------------------------------*/
4596
4597 FRESULT f_closedir (
4598 DIR *dp /* Pointer to the directory object to be closed */
4599 )
4600 {
4601 FRESULT res;
4602 FATFS *fs;
4603
4604
4605 res = validate(&dp->obj, &fs); /* Check validity of the file object */
4606 if (res == FR_OK) {
4607 #if FF_FS_LOCK != 0
4608 if (dp->obj.lockid) res = dec_lock(dp->obj.lockid); /* Decrement sub-directory open counter */
4609 if (res == FR_OK) dp->obj.fs = 0; /* Invalidate directory object */
4610 #else
4611 dp->obj.fs = 0; /* Invalidate directory object */
4612 #endif
4613 #if FF_FS_REENTRANT
4614 unlock_fs(fs, FR_OK); /* Unlock volume */
4615 #endif
4616 }
4617 return res;
4618 }
4619
4620
4621
4622
4623 /*-----------------------------------------------------------------------*/
4624 /* Read Directory Entries in Sequence */
4625 /*-----------------------------------------------------------------------*/
4626
4627 FRESULT f_readdir (
4628 DIR* dp, /* Pointer to the open directory object */
4629 FILINFO* fno /* Pointer to file information to return */
4630 )
4631 {
4632 FRESULT res;
4633 FATFS *fs;
4634 DEF_NAMBUF
4635
4636
4637 res = validate(&dp->obj, &fs); /* Check validity of the directory object */
4638 if (res == FR_OK) {
4639 if (!fno) {
4640 res = dir_sdi(dp, 0); /* Rewind the directory object */
4641 } else {
4642 INIT_NAMBUF(fs);
4643 res = DIR_READ_FILE(dp); /* Read an item */
4644 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory */
4645 if (res == FR_OK) { /* A valid entry is found */
4646 get_fileinfo(dp, fno); /* Get the object information */
4647 res = dir_next(dp, 0); /* Increment index for next */
4648 if (res == FR_NO_FILE) res = FR_OK; /* Ignore end of directory now */
4649 }
4650 FREE_NAMBUF();
4651 }
4652 }
4653 LEAVE_FF(fs, res);
4654 }
4655
4656
4657
4658 #if FF_USE_FIND
4659 /*-----------------------------------------------------------------------*/
4660 /* Find Next File */
4661 /*-----------------------------------------------------------------------*/
4662
4663 FRESULT f_findnext (
4664 DIR* dp, /* Pointer to the open directory object */
4665 FILINFO* fno /* Pointer to the file information structure */
4666 )
4667 {
4668 FRESULT res;
4669
4670
4671 for (;;) {
4672 res = f_readdir(dp, fno); /* Get a directory item */
4673 if (res != FR_OK || !fno || !fno->fname[0]) break; /* Terminate if any error or end of directory */
4674 if (pattern_match(dp->pat, fno->fname, 0, FIND_RECURS)) break; /* Test for the file name */
4675 #if FF_USE_LFN && FF_USE_FIND == 2
4676 if (pattern_match(dp->pat, fno->altname, 0, FIND_RECURS)) break; /* Test for alternative name if exist */
4677 #endif
4678 }
4679 return res;
4680 }
4681
4682
4683
4684 /*-----------------------------------------------------------------------*/
4685 /* Find First File */
4686 /*-----------------------------------------------------------------------*/
4687
4688 FRESULT f_findfirst (
4689 DIR* dp, /* Pointer to the blank directory object */
4690 FILINFO* fno, /* Pointer to the file information structure */
4691 const TCHAR* path, /* Pointer to the directory to open */
4692 const TCHAR* pattern /* Pointer to the matching pattern */
4693 )
4694 {
4695 FRESULT res;
4696
4697
4698 dp->pat = pattern; /* Save pointer to pattern string */
4699 res = f_opendir(dp, path); /* Open the target directory */
4700 if (res == FR_OK) {
4701 res = f_findnext(dp, fno); /* Find the first item */
4702 }
4703 return res;
4704 }
4705
4706 #endif /* FF_USE_FIND */
4707
4708
4709
4710 #if FF_FS_MINIMIZE == 0
4711 /*-----------------------------------------------------------------------*/
4712 /* Get File Status */
4713 /*-----------------------------------------------------------------------*/
4714
4715 FRESULT f_stat (
4716 const TCHAR* path, /* Pointer to the file path */
4717 FILINFO* fno /* Pointer to file information to return */
4718 )
4719 {
4720 FRESULT res;
4721 DIR dj;
4722 DEF_NAMBUF
4723
4724
4725 /* Get logical drive */
4726 res = mount_volume(&path, &dj.obj.fs, 0);
4727 if (res == FR_OK) {
4728 INIT_NAMBUF(dj.obj.fs);
4729 res = follow_path(&dj, path); /* Follow the file path */
4730 if (res == FR_OK) { /* Follow completed */
4731 if (dj.fn[NSFLAG] & NS_NONAME) { /* It is origin directory */
4732 res = FR_INVALID_NAME;
4733 } else { /* Found an object */
4734 if (fno) get_fileinfo(&dj, fno);
4735 }
4736 }
4737 FREE_NAMBUF();
4738 }
4739
4740 LEAVE_FF(dj.obj.fs, res);
4741 }
4742
4743
4744
4745 #if !FF_FS_READONLY
4746 /*-----------------------------------------------------------------------*/
4747 /* Get Number of Free Clusters */
4748 /*-----------------------------------------------------------------------*/
4749
4750 FRESULT f_getfree (
4751 const TCHAR* path, /* Logical drive number */
4752 DWORD* nclst, /* Pointer to a variable to return number of free clusters */
4753 FATFS** fatfs /* Pointer to return pointer to corresponding filesystem object */
4754 )
4755 {
4756 FRESULT res;
4757 FATFS *fs;
4758 DWORD nfree, clst, stat;
4759 LBA_t sect;
4760 UINT i;
4761 FFOBJID obj;
4762
4763
4764 /* Get logical drive */
4765 res = mount_volume(&path, &fs, 0);
4766 if (res == FR_OK) {
4767 *fatfs = fs; /* Return ptr to the fs object */
4768 /* If free_clst is valid, return it without full FAT scan */
4769 if (fs->free_clst <= fs->n_fatent - 2) {
4770 *nclst = fs->free_clst;
4771 } else {
4772 /* Scan FAT to obtain number of free clusters */
4773 nfree = 0;
4774 if (fs->fs_type == FS_FAT12) { /* FAT12: Scan bit field FAT entries */
4775 clst = 2; obj.fs = fs;
4776 do {
4777 stat = get_fat(&obj, clst);
4778 if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
4779 if (stat == 1) { res = FR_INT_ERR; break; }
4780 if (stat == 0) nfree++;
4781 } while (++clst < fs->n_fatent);
4782 } else {
4783 #if FF_FS_EXFAT
4784 if (fs->fs_type == FS_EXFAT) { /* exFAT: Scan allocation bitmap */
4785 BYTE bm;
4786 UINT b;
4787
4788 clst = fs->n_fatent - 2; /* Number of clusters */
4789 sect = fs->bitbase; /* Bitmap sector */
4790 i = 0; /* Offset in the sector */
4791 do { /* Counts numbuer of bits with zero in the bitmap */
4792 if (i == 0) {
4793 res = move_window(fs, sect++);
4794 if (res != FR_OK) break;
4795 }
4796 for (b = 8, bm = fs->win[i]; b && clst; b--, clst--) {
4797 if (!(bm & 1)) nfree++;
4798 bm >>= 1;
4799 }
4800 i = (i + 1) % SS(fs);
4801 } while (clst);
4802 } else
4803 #endif
4804 { /* FAT16/32: Scan WORD/DWORD FAT entries */
4805 clst = fs->n_fatent; /* Number of entries */
4806 sect = fs->fatbase; /* Top of the FAT */
4807 i = 0; /* Offset in the sector */
4808 do { /* Counts numbuer of entries with zero in the FAT */
4809 if (i == 0) {
4810 res = move_window(fs, sect++);
4811 if (res != FR_OK) break;
4812 }
4813 if (fs->fs_type == FS_FAT16) {
4814 if (ld_word(fs->win + i) == 0) nfree++;
4815 i += 2;
4816 } else {
4817 if ((ld_dword(fs->win + i) & 0x0FFFFFFF) == 0) nfree++;
4818 i += 4;
4819 }
4820 i %= SS(fs);
4821 } while (--clst);
4822 }
4823 }
4824 if (res == FR_OK) { /* Update parameters if succeeded */
4825 *nclst = nfree; /* Return the free clusters */
4826 fs->free_clst = nfree; /* Now free_clst is valid */
4827 fs->fsi_flag |= 1; /* FAT32: FSInfo is to be updated */
4828 }
4829 }
4830 }
4831
4832 LEAVE_FF(fs, res);
4833 }
4834
4835
4836
4837
4838 /*-----------------------------------------------------------------------*/
4839 /* Truncate File */
4840 /*-----------------------------------------------------------------------*/
4841
4842 FRESULT f_truncate (
4843 FIL* fp /* Pointer to the file object */
4844 )
4845 {
4846 FRESULT res;
4847 FATFS *fs;
4848 DWORD ncl;
4849
4850
4851 res = validate(&fp->obj, &fs); /* Check validity of the file object */
4852 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
4853 if (!(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
4854
4855 if (fp->fptr < fp->obj.objsize) { /* Process when fptr is not on the eof */
4856 if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
4857 res = remove_chain(&fp->obj, fp->obj.sclust, 0);
4858 fp->obj.sclust = 0;
4859 } else { /* When truncate a part of the file, remove remaining clusters */
4860 ncl = get_fat(&fp->obj, fp->clust);
4861 res = FR_OK;
4862 if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
4863 if (ncl == 1) res = FR_INT_ERR;
4864 if (res == FR_OK && ncl < fs->n_fatent) {
4865 res = remove_chain(&fp->obj, ncl, fp->clust);
4866 }
4867 }
4868 fp->obj.objsize = fp->fptr; /* Set file size to current read/write point */
4869 fp->flag |= FA_MODIFIED;
4870 #if !FF_FS_TINY
4871 if (res == FR_OK && (fp->flag & FA_DIRTY)) {
4872 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) {
4873 res = FR_DISK_ERR;
4874 } else {
4875 fp->flag &= (BYTE)~FA_DIRTY;
4876 }
4877 }
4878 #endif
4879 if (res != FR_OK) ABORT(fs, res);
4880 }
4881
4882 LEAVE_FF(fs, res);
4883 }
4884
4885
4886
4887
4888 /*-----------------------------------------------------------------------*/
4889 /* Delete a File/Directory */
4890 /*-----------------------------------------------------------------------*/
4891
4892 FRESULT f_unlink (
4893 const TCHAR* path /* Pointer to the file or directory path */
4894 )
4895 {
4896 FRESULT res;
4897 DIR dj, sdj;
4898 DWORD dclst = 0;
4899 FATFS *fs;
4900 #if FF_FS_EXFAT
4901 FFOBJID obj;
4902 #endif
4903 DEF_NAMBUF
4904
4905
4906 /* Get logical drive */
4907 res = mount_volume(&path, &fs, FA_WRITE);
4908 if (res == FR_OK) {
4909 dj.obj.fs = fs;
4910 INIT_NAMBUF(fs);
4911 res = follow_path(&dj, path); /* Follow the file path */
4912 if (FF_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT)) {
4913 res = FR_INVALID_NAME; /* Cannot remove dot entry */
4914 }
4915 #if FF_FS_LOCK != 0
4916 if (res == FR_OK) res = chk_lock(&dj, 2); /* Check if it is an open object */
4917 #endif
4918 if (res == FR_OK) { /* The object is accessible */
4919 if (dj.fn[NSFLAG] & NS_NONAME) {
4920 res = FR_INVALID_NAME; /* Cannot remove the origin directory */
4921 } else {
4922 if (dj.obj.attr & AM_RDO) {
4923 res = FR_DENIED; /* Cannot remove R/O object */
4924 }
4925 }
4926 if (res == FR_OK) {
4927 #if FF_FS_EXFAT
4928 obj.fs = fs;
4929 if (fs->fs_type == FS_EXFAT) {
4930 init_alloc_info(fs, &obj);
4931 dclst = obj.sclust;
4932 } else
4933 #endif
4934 {
4935 dclst = ld_clust(fs, dj.dir);
4936 }
4937 if (dj.obj.attr & AM_DIR) { /* Is it a sub-directory? */
4938 #if FF_FS_RPATH != 0
4939 if (dclst == fs->cdir) { /* Is it the current directory? */
4940 res = FR_DENIED;
4941 } else
4942 #endif
4943 {
4944 sdj.obj.fs = fs; /* Open the sub-directory */
4945 sdj.obj.sclust = dclst;
4946 #if FF_FS_EXFAT
4947 if (fs->fs_type == FS_EXFAT) {
4948 sdj.obj.objsize = obj.objsize;
4949 sdj.obj.stat = obj.stat;
4950 }
4951 #endif
4952 res = dir_sdi(&sdj, 0);
4953 if (res == FR_OK) {
4954 res = DIR_READ_FILE(&sdj); /* Test if the directory is empty */
4955 if (res == FR_OK) res = FR_DENIED; /* Not empty? */
4956 if (res == FR_NO_FILE) res = FR_OK; /* Empty? */
4957 }
4958 }
4959 }
4960 }
4961 if (res == FR_OK) {
4962 res = dir_remove(&dj); /* Remove the directory entry */
4963 if (res == FR_OK && dclst != 0) { /* Remove the cluster chain if exist */
4964 #if FF_FS_EXFAT
4965 res = remove_chain(&obj, dclst, 0);
4966 #else
4967 res = remove_chain(&dj.obj, dclst, 0);
4968 #endif
4969 }
4970 if (res == FR_OK) res = sync_fs(fs);
4971 }
4972 }
4973 FREE_NAMBUF();
4974 }
4975
4976 LEAVE_FF(fs, res);
4977 }
4978
4979
4980
4981
4982 /*-----------------------------------------------------------------------*/
4983 /* Create a Directory */
4984 /*-----------------------------------------------------------------------*/
4985
4986 FRESULT f_mkdir (
4987 const TCHAR* path /* Pointer to the directory path */
4988 )
4989 {
4990 FRESULT res;
4991 DIR dj;
4992 FFOBJID sobj;
4993 FATFS *fs;
4994 DWORD dcl, pcl, tm;
4995 DEF_NAMBUF
4996
4997
4998 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
4999 if (res == FR_OK) {
5000 dj.obj.fs = fs;
5001 INIT_NAMBUF(fs);
5002 res = follow_path(&dj, path); /* Follow the file path */
5003 if (res == FR_OK) res = FR_EXIST; /* Name collision? */
5004 if (FF_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT)) { /* Invalid name? */
5005 res = FR_INVALID_NAME;
5006 }
5007 if (res == FR_NO_FILE) { /* It is clear to create a new directory */
5008 sobj.fs = fs; /* New object id to create a new chain */
5009 dcl = create_chain(&sobj, 0); /* Allocate a cluster for the new directory */
5010 res = FR_OK;
5011 if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster? */
5012 if (dcl == 1) res = FR_INT_ERR; /* Any insanity? */
5013 if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR; /* Disk error? */
5014 tm = GET_FATTIME();
5015 if (res == FR_OK) {
5016 res = dir_clear(fs, dcl); /* Clean up the new table */
5017 if (res == FR_OK) {
5018 if (!FF_FS_EXFAT || fs->fs_type != FS_EXFAT) { /* Create dot entries (FAT only) */
5019 memset(fs->win + DIR_Name, ' ', 11); /* Create "." entry */
5020 fs->win[DIR_Name] = '.';
5021 fs->win[DIR_Attr] = AM_DIR;
5022 st_dword(fs->win + DIR_ModTime, tm);
5023 st_clust(fs, fs->win, dcl);
5024 memcpy(fs->win + SZDIRE, fs->win, SZDIRE); /* Create ".." entry */
5025 fs->win[SZDIRE + 1] = '.'; pcl = dj.obj.sclust;
5026 st_clust(fs, fs->win + SZDIRE, pcl);
5027 fs->wflag = 1;
5028 }
5029 res = dir_register(&dj); /* Register the object to the parent directoy */
5030 }
5031 }
5032 if (res == FR_OK) {
5033 #if FF_FS_EXFAT
5034 if (fs->fs_type == FS_EXFAT) { /* Initialize directory entry block */
5035 st_dword(fs->dirbuf + XDIR_ModTime, tm); /* Created time */
5036 st_dword(fs->dirbuf + XDIR_FstClus, dcl); /* Table start cluster */
5037 st_dword(fs->dirbuf + XDIR_FileSize, (DWORD)fs->csize * SS(fs)); /* Directory size needs to be valid */
5038 st_dword(fs->dirbuf + XDIR_ValidFileSize, (DWORD)fs->csize * SS(fs));
5039 fs->dirbuf[XDIR_GenFlags] = 3; /* Initialize the object flag */
5040 fs->dirbuf[XDIR_Attr] = AM_DIR; /* Attribute */
5041 res = store_xdir(&dj);
5042 } else
5043 #endif
5044 {
5045 st_dword(dj.dir + DIR_ModTime, tm); /* Created time */
5046 st_clust(fs, dj.dir, dcl); /* Table start cluster */
5047 dj.dir[DIR_Attr] = AM_DIR; /* Attribute */
5048 fs->wflag = 1;
5049 }
5050 if (res == FR_OK) {
5051 res = sync_fs(fs);
5052 }
5053 } else {
5054 remove_chain(&sobj, dcl, 0); /* Could not register, remove the allocated cluster */
5055 }
5056 }
5057 FREE_NAMBUF();
5058 }
5059
5060 LEAVE_FF(fs, res);
5061 }
5062
5063
5064
5065
5066 /*-----------------------------------------------------------------------*/
5067 /* Rename a File/Directory */
5068 /*-----------------------------------------------------------------------*/
5069
5070 FRESULT f_rename (
5071 const TCHAR* path_old, /* Pointer to the object name to be renamed */
5072 const TCHAR* path_new /* Pointer to the new name */
5073 )
5074 {
5075 FRESULT res;
5076 DIR djo, djn;
5077 FATFS *fs;
5078 BYTE buf[FF_FS_EXFAT ? SZDIRE * 2 : SZDIRE], *dir;
5079 LBA_t sect;
5080 DEF_NAMBUF
5081
5082
5083 get_ldnumber(&path_new); /* Snip the drive number of new name off */
5084 res = mount_volume(&path_old, &fs, FA_WRITE); /* Get logical drive of the old object */
5085 if (res == FR_OK) {
5086 djo.obj.fs = fs;
5087 INIT_NAMBUF(fs);
5088 res = follow_path(&djo, path_old); /* Check old object */
5089 if (res == FR_OK && (djo.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check validity of name */
5090 #if FF_FS_LOCK != 0
5091 if (res == FR_OK) {
5092 res = chk_lock(&djo, 2);
5093 }
5094 #endif
5095 if (res == FR_OK) { /* Object to be renamed is found */
5096 #if FF_FS_EXFAT
5097 if (fs->fs_type == FS_EXFAT) { /* At exFAT volume */
5098 BYTE nf, nn;
5099 WORD nh;
5100
5101 memcpy(buf, fs->dirbuf, SZDIRE * 2); /* Save 85+C0 entry of old object */
5102 memcpy(&djn, &djo, sizeof djo);
5103 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5104 if (res == FR_OK) { /* Is new name already in use by any other object? */
5105 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5106 }
5107 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5108 res = dir_register(&djn); /* Register the new entry */
5109 if (res == FR_OK) {
5110 nf = fs->dirbuf[XDIR_NumSec]; nn = fs->dirbuf[XDIR_NumName];
5111 nh = ld_word(fs->dirbuf + XDIR_NameHash);
5112 memcpy(fs->dirbuf, buf, SZDIRE * 2); /* Restore 85+C0 entry */
5113 fs->dirbuf[XDIR_NumSec] = nf; fs->dirbuf[XDIR_NumName] = nn;
5114 st_word(fs->dirbuf + XDIR_NameHash, nh);
5115 if (!(fs->dirbuf[XDIR_Attr] & AM_DIR)) fs->dirbuf[XDIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5116 /* Start of critical section where an interruption can cause a cross-link */
5117 res = store_xdir(&djn);
5118 }
5119 }
5120 } else
5121 #endif
5122 { /* At FAT/FAT32 volume */
5123 memcpy(buf, djo.dir, SZDIRE); /* Save directory entry of the object */
5124 memcpy(&djn, &djo, sizeof (DIR)); /* Duplicate the directory object */
5125 res = follow_path(&djn, path_new); /* Make sure if new object name is not in use */
5126 if (res == FR_OK) { /* Is new name already in use by any other object? */
5127 res = (djn.obj.sclust == djo.obj.sclust && djn.dptr == djo.dptr) ? FR_NO_FILE : FR_EXIST;
5128 }
5129 if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
5130 res = dir_register(&djn); /* Register the new entry */
5131 if (res == FR_OK) {
5132 dir = djn.dir; /* Copy directory entry of the object except name */
5133 memcpy(dir + 13, buf + 13, SZDIRE - 13);
5134 dir[DIR_Attr] = buf[DIR_Attr];
5135 if (!(dir[DIR_Attr] & AM_DIR)) dir[DIR_Attr] |= AM_ARC; /* Set archive attribute if it is a file */
5136 fs->wflag = 1;
5137 if ((dir[DIR_Attr] & AM_DIR) && djo.obj.sclust != djn.obj.sclust) { /* Update .. entry in the sub-directory if needed */
5138 sect = clst2sect(fs, ld_clust(fs, dir));
5139 if (sect == 0) {
5140 res = FR_INT_ERR;
5141 } else {
5142 /* Start of critical section where an interruption can cause a cross-link */
5143 res = move_window(fs, sect);
5144 dir = fs->win + SZDIRE * 1; /* Ptr to .. entry */
5145 if (res == FR_OK && dir[1] == '.') {
5146 st_clust(fs, dir, djn.obj.sclust);
5147 fs->wflag = 1;
5148 }
5149 }
5150 }
5151 }
5152 }
5153 }
5154 if (res == FR_OK) {
5155 res = dir_remove(&djo); /* Remove old entry */
5156 if (res == FR_OK) {
5157 res = sync_fs(fs);
5158 }
5159 }
5160 /* End of the critical section */
5161 }
5162 FREE_NAMBUF();
5163 }
5164
5165 LEAVE_FF(fs, res);
5166 }
5167
5168 #endif /* !FF_FS_READONLY */
5169 #endif /* FF_FS_MINIMIZE == 0 */
5170 #endif /* FF_FS_MINIMIZE <= 1 */
5171 #endif /* FF_FS_MINIMIZE <= 2 */
5172
5173
5174
5175 #if FF_USE_CHMOD && !FF_FS_READONLY
5176 /*-----------------------------------------------------------------------*/
5177 /* Change Attribute */
5178 /*-----------------------------------------------------------------------*/
5179
5180 FRESULT f_chmod (
5181 const TCHAR* path, /* Pointer to the file path */
5182 BYTE attr, /* Attribute bits */
5183 BYTE mask /* Attribute mask to change */
5184 )
5185 {
5186 FRESULT res;
5187 DIR dj;
5188 FATFS *fs;
5189 DEF_NAMBUF
5190
5191
5192 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5193 if (res == FR_OK) {
5194 dj.obj.fs = fs;
5195 INIT_NAMBUF(fs);
5196 res = follow_path(&dj, path); /* Follow the file path */
5197 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5198 if (res == FR_OK) {
5199 mask &= AM_RDO|AM_HID|AM_SYS|AM_ARC; /* Valid attribute mask */
5200 #if FF_FS_EXFAT
5201 if (fs->fs_type == FS_EXFAT) {
5202 fs->dirbuf[XDIR_Attr] = (attr & mask) | (fs->dirbuf[XDIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5203 res = store_xdir(&dj);
5204 } else
5205 #endif
5206 {
5207 dj.dir[DIR_Attr] = (attr & mask) | (dj.dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
5208 fs->wflag = 1;
5209 }
5210 if (res == FR_OK) {
5211 res = sync_fs(fs);
5212 }
5213 }
5214 FREE_NAMBUF();
5215 }
5216
5217 LEAVE_FF(fs, res);
5218 }
5219
5220
5221
5222
5223 /*-----------------------------------------------------------------------*/
5224 /* Change Timestamp */
5225 /*-----------------------------------------------------------------------*/
5226
5227 FRESULT f_utime (
5228 const TCHAR* path, /* Pointer to the file/directory name */
5229 const FILINFO* fno /* Pointer to the timestamp to be set */
5230 )
5231 {
5232 FRESULT res;
5233 DIR dj;
5234 FATFS *fs;
5235 DEF_NAMBUF
5236
5237
5238 res = mount_volume(&path, &fs, FA_WRITE); /* Get logical drive */
5239 if (res == FR_OK) {
5240 dj.obj.fs = fs;
5241 INIT_NAMBUF(fs);
5242 res = follow_path(&dj, path); /* Follow the file path */
5243 if (res == FR_OK && (dj.fn[NSFLAG] & (NS_DOT | NS_NONAME))) res = FR_INVALID_NAME; /* Check object validity */
5244 if (res == FR_OK) {
5245 #if FF_FS_EXFAT
5246 if (fs->fs_type == FS_EXFAT) {
5247 st_dword(fs->dirbuf + XDIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5248 res = store_xdir(&dj);
5249 } else
5250 #endif
5251 {
5252 st_dword(dj.dir + DIR_ModTime, (DWORD)fno->fdate << 16 | fno->ftime);
5253 fs->wflag = 1;
5254 }
5255 if (res == FR_OK) {
5256 res = sync_fs(fs);
5257 }
5258 }
5259 FREE_NAMBUF();
5260 }
5261
5262 LEAVE_FF(fs, res);
5263 }
5264
5265 #endif /* FF_USE_CHMOD && !FF_FS_READONLY */
5266
5267
5268
5269 #if FF_USE_LABEL
5270 /*-----------------------------------------------------------------------*/
5271 /* Get Volume Label */
5272 /*-----------------------------------------------------------------------*/
5273
5274 FRESULT f_getlabel (
5275 const TCHAR* path, /* Logical drive number */
5276 TCHAR* label, /* Buffer to store the volume label */
5277 DWORD* vsn /* Variable to store the volume serial number */
5278 )
5279 {
5280 FRESULT res;
5281 DIR dj;
5282 FATFS *fs;
5283 UINT si, di;
5284 WCHAR wc;
5285
5286 /* Get logical drive */
5287 res = mount_volume(&path, &fs, 0);
5288
5289 /* Get volume label */
5290 if (res == FR_OK && label) {
5291 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5292 res = dir_sdi(&dj, 0);
5293 if (res == FR_OK) {
5294 res = DIR_READ_LABEL(&dj); /* Find a volume label entry */
5295 if (res == FR_OK) {
5296 #if FF_FS_EXFAT
5297 if (fs->fs_type == FS_EXFAT) {
5298 WCHAR hs;
5299 UINT nw;
5300
5301 for (si = di = hs = 0; si < dj.dir[XDIR_NumLabel]; si++) { /* Extract volume label from 83 entry */
5302 wc = ld_word(dj.dir + XDIR_Label + si * 2);
5303 if (hs == 0 && IsSurrogate(wc)) { /* Is the code a surrogate? */
5304 hs = wc; continue;
5305 }
5306 nw = put_utf((DWORD)hs << 16 | wc, &label[di], 4); /* Store it in API encoding */
5307 if (nw == 0) { di = 0; break; } /* Encode error? */
5308 di += nw;
5309 hs = 0;
5310 }
5311 if (hs != 0) di = 0; /* Broken surrogate pair? */
5312 label[di] = 0;
5313 } else
5314 #endif
5315 {
5316 si = di = 0; /* Extract volume label from AM_VOL entry */
5317 while (si < 11) {
5318 wc = dj.dir[si++];
5319 #if FF_USE_LFN && FF_LFN_UNICODE >= 1 /* Unicode output */
5320 if (dbc_1st((BYTE)wc) && si < 11) wc = wc << 8 | dj.dir[si++]; /* Is it a DBC? */
5321 wc = ff_oem2uni(wc, CODEPAGE); /* Convert it into Unicode */
5322 if (wc == 0) { di = 0; break; } /* Invalid char in current code page? */
5323 di += put_utf(wc, &label[di], 4); /* Store it in Unicode */
5324 #else /* ANSI/OEM output */
5325 label[di++] = (TCHAR)wc;
5326 #endif
5327 }
5328 do { /* Truncate trailing spaces */
5329 label[di] = 0;
5330 if (di == 0) break;
5331 } while (label[--di] == ' ');
5332 }
5333 }
5334 }
5335 if (res == FR_NO_FILE) { /* No label entry and return nul string */
5336 label[0] = 0;
5337 res = FR_OK;
5338 }
5339 }
5340
5341 /* Get volume serial number */
5342 if (res == FR_OK && vsn) {
5343 res = move_window(fs, fs->volbase);
5344 if (res == FR_OK) {
5345 switch (fs->fs_type) {
5346 case FS_EXFAT:
5347 di = BPB_VolIDEx;
5348 break;
5349
5350 case FS_FAT32:
5351 di = BS_VolID32;
5352 break;
5353
5354 default:
5355 di = BS_VolID;
5356 }
5357 *vsn = ld_dword(fs->win + di);
5358 }
5359 }
5360
5361 LEAVE_FF(fs, res);
5362 }
5363
5364
5365
5366 #if !FF_FS_READONLY
5367 /*-----------------------------------------------------------------------*/
5368 /* Set Volume Label */
5369 /*-----------------------------------------------------------------------*/
5370
5371 FRESULT f_setlabel (
5372 const TCHAR* label /* Volume label to set with heading logical drive number */
5373 )
5374 {
5375 FRESULT res;
5376 DIR dj;
5377 FATFS *fs;
5378 BYTE dirvn[22];
5379 UINT di;
5380 WCHAR wc;
5381 static const char badchr[18] = "+.,;=[]" "/*:<>|\\\"\?\x7F"; /* [0..16] for FAT, [7..16] for exFAT */
5382 #if FF_USE_LFN
5383 DWORD dc;
5384 #endif
5385
5386 /* Get logical drive */
5387 res = mount_volume(&label, &fs, FA_WRITE);
5388 if (res != FR_OK) LEAVE_FF(fs, res);
5389
5390 #if FF_FS_EXFAT
5391 if (fs->fs_type == FS_EXFAT) { /* On the exFAT volume */
5392 memset(dirvn, 0, 22);
5393 di = 0;
5394 while ((UINT)*label >= ' ') { /* Create volume label */
5395 dc = tchar2uni(&label); /* Get a Unicode character */
5396 if (dc >= 0x10000) {
5397 if (dc == 0xFFFFFFFF || di >= 10) { /* Wrong surrogate or buffer overflow */
5398 dc = 0;
5399 } else {
5400 st_word(dirvn + di * 2, (WCHAR)(dc >> 16)); di++;
5401 }
5402 }
5403 if (dc == 0 || strchr(&badchr[7], (int)dc) || di >= 11) { /* Check validity of the volume label */
5404 LEAVE_FF(fs, FR_INVALID_NAME);
5405 }
5406 st_word(dirvn + di * 2, (WCHAR)dc); di++;
5407 }
5408 } else
5409 #endif
5410 { /* On the FAT/FAT32 volume */
5411 memset(dirvn, ' ', 11);
5412 di = 0;
5413 while ((UINT)*label >= ' ') { /* Create volume label */
5414 #if FF_USE_LFN
5415 dc = tchar2uni(&label);
5416 wc = (dc < 0x10000) ? ff_uni2oem(ff_wtoupper(dc), CODEPAGE) : 0;
5417 #else /* ANSI/OEM input */
5418 wc = (BYTE)*label++;
5419 if (dbc_1st((BYTE)wc)) wc = dbc_2nd((BYTE)*label) ? wc << 8 | (BYTE)*label++ : 0;
5420 if (IsLower(wc)) wc -= 0x20; /* To upper ASCII characters */
5421 #if FF_CODE_PAGE == 0
5422 if (ExCvt && wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5423 #elif FF_CODE_PAGE < 900
5424 if (wc >= 0x80) wc = ExCvt[wc - 0x80]; /* To upper extended characters (SBCS cfg) */
5425 #endif
5426 #endif
5427 if (wc == 0 || strchr(&badchr[0], (int)wc) || di >= (UINT)((wc >= 0x100) ? 10 : 11)) { /* Reject invalid characters for volume label */
5428 LEAVE_FF(fs, FR_INVALID_NAME);
5429 }
5430 if (wc >= 0x100) dirvn[di++] = (BYTE)(wc >> 8);
5431 dirvn[di++] = (BYTE)wc;
5432 }
5433 if (dirvn[0] == DDEM) LEAVE_FF(fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
5434 while (di && dirvn[di - 1] == ' ') di--; /* Snip trailing spaces */
5435 }
5436
5437 /* Set volume label */
5438 dj.obj.fs = fs; dj.obj.sclust = 0; /* Open root directory */
5439 res = dir_sdi(&dj, 0);
5440 if (res == FR_OK) {
5441 res = DIR_READ_LABEL(&dj); /* Get volume label entry */
5442 if (res == FR_OK) {
5443 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5444 dj.dir[XDIR_NumLabel] = (BYTE)di; /* Change the volume label */
5445 memcpy(dj.dir + XDIR_Label, dirvn, 22);
5446 } else {
5447 if (di != 0) {
5448 memcpy(dj.dir, dirvn, 11); /* Change the volume label */
5449 } else {
5450 dj.dir[DIR_Name] = DDEM; /* Remove the volume label */
5451 }
5452 }
5453 fs->wflag = 1;
5454 res = sync_fs(fs);
5455 } else { /* No volume label entry or an error */
5456 if (res == FR_NO_FILE) {
5457 res = FR_OK;
5458 if (di != 0) { /* Create a volume label entry */
5459 res = dir_alloc(&dj, 1); /* Allocate an entry */
5460 if (res == FR_OK) {
5461 memset(dj.dir, 0, SZDIRE); /* Clean the entry */
5462 if (FF_FS_EXFAT && fs->fs_type == FS_EXFAT) {
5463 dj.dir[XDIR_Type] = ET_VLABEL; /* Create volume label entry */
5464 dj.dir[XDIR_NumLabel] = (BYTE)di;
5465 memcpy(dj.dir + XDIR_Label, dirvn, 22);
5466 } else {
5467 dj.dir[DIR_Attr] = AM_VOL; /* Create volume label entry */
5468 memcpy(dj.dir, dirvn, 11);
5469 }
5470 fs->wflag = 1;
5471 res = sync_fs(fs);
5472 }
5473 }
5474 }
5475 }
5476 }
5477
5478 LEAVE_FF(fs, res);
5479 }
5480
5481 #endif /* !FF_FS_READONLY */
5482 #endif /* FF_USE_LABEL */
5483
5484
5485
5486 #if FF_USE_EXPAND && !FF_FS_READONLY
5487 /*-----------------------------------------------------------------------*/
5488 /* Allocate a Contiguous Blocks to the File */
5489 /*-----------------------------------------------------------------------*/
5490
5491 FRESULT f_expand (
5492 FIL* fp, /* Pointer to the file object */
5493 FSIZE_t fsz, /* File size to be expanded to */
5494 BYTE opt /* Operation mode 0:Find and prepare or 1:Find and allocate */
5495 )
5496 {
5497 FRESULT res;
5498 FATFS *fs;
5499 DWORD n, clst, stcl, scl, ncl, tcl, lclst;
5500
5501
5502 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5503 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5504 if (fsz == 0 || fp->obj.objsize != 0 || !(fp->flag & FA_WRITE)) LEAVE_FF(fs, FR_DENIED);
5505 #if FF_FS_EXFAT
5506 if (fs->fs_type != FS_EXFAT && fsz >= 0x100000000) LEAVE_FF(fs, FR_DENIED); /* Check if in size limit */
5507 #endif
5508 n = (DWORD)fs->csize * SS(fs); /* Cluster size */
5509 tcl = (DWORD)(fsz / n) + ((fsz & (n - 1)) ? 1 : 0); /* Number of clusters required */
5510 stcl = fs->last_clst; lclst = 0;
5511 if (stcl < 2 || stcl >= fs->n_fatent) stcl = 2;
5512
5513 #if FF_FS_EXFAT
5514 if (fs->fs_type == FS_EXFAT) {
5515 scl = find_bitmap(fs, stcl, tcl); /* Find a contiguous cluster block */
5516 if (scl == 0) res = FR_DENIED; /* No contiguous cluster block was found */
5517 if (scl == 0xFFFFFFFF) res = FR_DISK_ERR;
5518 if (res == FR_OK) { /* A contiguous free area is found */
5519 if (opt) { /* Allocate it now */
5520 res = change_bitmap(fs, scl, tcl, 1); /* Mark the cluster block 'in use' */
5521 lclst = scl + tcl - 1;
5522 } else { /* Set it as suggested point for next allocation */
5523 lclst = scl - 1;
5524 }
5525 }
5526 } else
5527 #endif
5528 {
5529 scl = clst = stcl; ncl = 0;
5530 for (;;) { /* Find a contiguous cluster block */
5531 n = get_fat(&fp->obj, clst);
5532 if (++clst >= fs->n_fatent) clst = 2;
5533 if (n == 1) { res = FR_INT_ERR; break; }
5534 if (n == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
5535 if (n == 0) { /* Is it a free cluster? */
5536 if (++ncl == tcl) break; /* Break if a contiguous cluster block is found */
5537 } else {
5538 scl = clst; ncl = 0; /* Not a free cluster */
5539 }
5540 if (clst == stcl) { res = FR_DENIED; break; } /* No contiguous cluster? */
5541 }
5542 if (res == FR_OK) { /* A contiguous free area is found */
5543 if (opt) { /* Allocate it now */
5544 for (clst = scl, n = tcl; n; clst++, n--) { /* Create a cluster chain on the FAT */
5545 res = put_fat(fs, clst, (n == 1) ? 0xFFFFFFFF : clst + 1);
5546 if (res != FR_OK) break;
5547 lclst = clst;
5548 }
5549 } else { /* Set it as suggested point for next allocation */
5550 lclst = scl - 1;
5551 }
5552 }
5553 }
5554
5555 if (res == FR_OK) {
5556 fs->last_clst = lclst; /* Set suggested start cluster to start next */
5557 if (opt) { /* Is it allocated now? */
5558 fp->obj.sclust = scl; /* Update object allocation information */
5559 fp->obj.objsize = fsz;
5560 if (FF_FS_EXFAT) fp->obj.stat = 2; /* Set status 'contiguous chain' */
5561 fp->flag |= FA_MODIFIED;
5562 if (fs->free_clst <= fs->n_fatent - 2) { /* Update FSINFO */
5563 fs->free_clst -= tcl;
5564 fs->fsi_flag |= 1;
5565 }
5566 }
5567 }
5568
5569 LEAVE_FF(fs, res);
5570 }
5571
5572 #endif /* FF_USE_EXPAND && !FF_FS_READONLY */
5573
5574
5575
5576 #if FF_USE_FORWARD
5577 /*-----------------------------------------------------------------------*/
5578 /* Forward Data to the Stream Directly */
5579 /*-----------------------------------------------------------------------*/
5580
5581 FRESULT f_forward (
5582 FIL* fp, /* Pointer to the file object */
5583 UINT (*func)(const BYTE*,UINT), /* Pointer to the streaming function */
5584 UINT btf, /* Number of bytes to forward */
5585 UINT* bf /* Pointer to number of bytes forwarded */
5586 )
5587 {
5588 FRESULT res;
5589 FATFS *fs;
5590 DWORD clst;
5591 LBA_t sect;
5592 FSIZE_t remain;
5593 UINT rcnt, csect;
5594 BYTE *dbuf;
5595
5596
5597 *bf = 0; /* Clear transfer byte counter */
5598 res = validate(&fp->obj, &fs); /* Check validity of the file object */
5599 if (res != FR_OK || (res = (FRESULT)fp->err) != FR_OK) LEAVE_FF(fs, res);
5600 if (!(fp->flag & FA_READ)) LEAVE_FF(fs, FR_DENIED); /* Check access mode */
5601
5602 remain = fp->obj.objsize - fp->fptr;
5603 if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
5604
5605 for ( ; btf > 0 && (*func)(0, 0); fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) { /* Repeat until all data transferred or stream goes busy */
5606 csect = (UINT)(fp->fptr / SS(fs) & (fs->csize - 1)); /* Sector offset in the cluster */
5607 if (fp->fptr % SS(fs) == 0) { /* On the sector boundary? */
5608 if (csect == 0) { /* On the cluster boundary? */
5609 clst = (fp->fptr == 0) ? /* On the top of the file? */
5610 fp->obj.sclust : get_fat(&fp->obj, fp->clust);
5611 if (clst <= 1) ABORT(fs, FR_INT_ERR);
5612 if (clst == 0xFFFFFFFF) ABORT(fs, FR_DISK_ERR);
5613 fp->clust = clst; /* Update current cluster */
5614 }
5615 }
5616 sect = clst2sect(fs, fp->clust); /* Get current data sector */
5617 if (sect == 0) ABORT(fs, FR_INT_ERR);
5618 sect += csect;
5619 #if FF_FS_TINY
5620 if (move_window(fs, sect) != FR_OK) ABORT(fs, FR_DISK_ERR); /* Move sector window to the file data */
5621 dbuf = fs->win;
5622 #else
5623 if (fp->sect != sect) { /* Fill sector cache with file data */
5624 #if !FF_FS_READONLY
5625 if (fp->flag & FA_DIRTY) { /* Write-back dirty sector cache */
5626 if (disk_write(fs->pdrv, fp->buf, fp->sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5627 fp->flag &= (BYTE)~FA_DIRTY;
5628 }
5629 #endif
5630 if (disk_read(fs->pdrv, fp->buf, sect, 1) != RES_OK) ABORT(fs, FR_DISK_ERR);
5631 }
5632 dbuf = fp->buf;
5633 #endif
5634 fp->sect = sect;
5635 rcnt = SS(fs) - (UINT)fp->fptr % SS(fs); /* Number of bytes remains in the sector */
5636 if (rcnt > btf) rcnt = btf; /* Clip it by btr if needed */
5637 rcnt = (*func)(dbuf + ((UINT)fp->fptr % SS(fs)), rcnt); /* Forward the file data */
5638 if (rcnt == 0) ABORT(fs, FR_INT_ERR);
5639 }
5640
5641 LEAVE_FF(fs, FR_OK);
5642 }
5643 #endif /* FF_USE_FORWARD */
5644
5645
5646
5647 #if !FF_FS_READONLY && FF_USE_MKFS
5648 /*-----------------------------------------------------------------------*/
5649 /* Create FAT/exFAT volume (with sub-functions) */
5650 /*-----------------------------------------------------------------------*/
5651
5652 #define N_SEC_TRACK 63 /* Sectors per track for determination of drive CHS */
5653 #define GPT_ALIGN 0x100000 /* Alignment of partitions in GPT [byte] (>=128KB) */
5654 #define GPT_ITEMS 128 /* Number of GPT table size (>=128, sector aligned) */
5655
5656
5657 /* Create partitions on the physical drive in format of MBR or GPT */
5658
5659 static FRESULT create_partition (
5660 BYTE drv, /* Physical drive number */
5661 const LBA_t plst[], /* Partition list */
5662 BYTE sys, /* System ID (for only MBR, temp setting) */
5663 BYTE* buf /* Working buffer for a sector */
5664 )
5665 {
5666 UINT i, cy;
5667 LBA_t sz_drv;
5668 DWORD sz_drv32, nxt_alloc32, sz_part32;
5669 BYTE *pte;
5670 BYTE hd, n_hd, sc, n_sc;
5671
5672 /* Get physical drive size */
5673 if (disk_ioctl(drv, GET_SECTOR_COUNT, &sz_drv) != RES_OK) return FR_DISK_ERR;
5674
5675 #if FF_LBA64
5676 if (sz_drv >= FF_MIN_GPT) { /* Create partitions in GPT format */
5677 WORD ss;
5678 UINT sz_ptbl, pi, si, ofs;
5679 DWORD bcc, rnd, align;
5680 QWORD nxt_alloc, sz_part, sz_pool, top_bpt;
5681 static const BYTE gpt_mbr[16] = {0x00, 0x00, 0x02, 0x00, 0xEE, 0xFE, 0xFF, 0x00, 0x01, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF};
5682
5683 #if FF_MAX_SS != FF_MIN_SS
5684 if (disk_ioctl(drv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR; /* Get sector size */
5685 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5686 #else
5687 ss = FF_MAX_SS;
5688 #endif
5689 rnd = (DWORD)sz_drv + GET_FATTIME(); /* Random seed */
5690 align = GPT_ALIGN / ss; /* Partition alignment for GPT [sector] */
5691 sz_ptbl = GPT_ITEMS * SZ_GPTE / ss; /* Size of partition table [sector] */
5692 top_bpt = sz_drv - sz_ptbl - 1; /* Backup partiiton table start sector */
5693 nxt_alloc = 2 + sz_ptbl; /* First allocatable sector */
5694 sz_pool = top_bpt - nxt_alloc; /* Size of allocatable area */
5695 bcc = 0xFFFFFFFF; sz_part = 1;
5696 pi = si = 0; /* partition table index, size table index */
5697 do {
5698 if (pi * SZ_GPTE % ss == 0) memset(buf, 0, ss); /* Clean the buffer if needed */
5699 if (sz_part != 0) { /* Is the size table not termintated? */
5700 nxt_alloc = (nxt_alloc + align - 1) & ((QWORD)0 - align); /* Align partition start */
5701 sz_part = plst[si++]; /* Get a partition size */
5702 if (sz_part <= 100) { /* Is the size in percentage? */
5703 sz_part = sz_pool * sz_part / 100;
5704 sz_part = (sz_part + align - 1) & ((QWORD)0 - align); /* Align partition end (only if in percentage) */
5705 }
5706 if (nxt_alloc + sz_part > top_bpt) { /* Clip the size at end of the pool */
5707 sz_part = (nxt_alloc < top_bpt) ? top_bpt - nxt_alloc : 0;
5708 }
5709 }
5710 if (sz_part != 0) { /* Add a partition? */
5711 ofs = pi * SZ_GPTE % ss;
5712 memcpy(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16); /* Set partition GUID (Microsoft Basic Data) */
5713 rnd = make_rand(rnd, buf + ofs + GPTE_UpGuid, 16); /* Set unique partition GUID */
5714 st_qword(buf + ofs + GPTE_FstLba, nxt_alloc); /* Set partition start sector */
5715 st_qword(buf + ofs + GPTE_LstLba, nxt_alloc + sz_part - 1); /* Set partition end sector */
5716 nxt_alloc += sz_part; /* Next allocatable sector */
5717 }
5718 if ((pi + 1) * SZ_GPTE % ss == 0) { /* Write the buffer if it is filled up */
5719 for (i = 0; i < ss; bcc = crc32(bcc, buf[i++])) ; /* Calculate table check sum */
5720 if (disk_write(drv, buf, 2 + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Write to primary table */
5721 if (disk_write(drv, buf, top_bpt + pi * SZ_GPTE / ss, 1) != RES_OK) return FR_DISK_ERR; /* Write to secondary table */
5722 }
5723 } while (++pi < GPT_ITEMS);
5724
5725 /* Create primary GPT header */
5726 memset(buf, 0, ss);
5727 memcpy(buf + GPTH_Sign, "EFI PART" "\0\0\1\0" "\x5C\0\0", 16); /* Signature, version (1.0) and size (92) */
5728 st_dword(buf + GPTH_PtBcc, ~bcc); /* Table check sum */
5729 st_qword(buf + GPTH_CurLba, 1); /* LBA of this header */
5730 st_qword(buf + GPTH_BakLba, sz_drv - 1); /* LBA of secondary header */
5731 st_qword(buf + GPTH_FstLba, 2 + sz_ptbl); /* LBA of first allocatable sector */
5732 st_qword(buf + GPTH_LstLba, top_bpt - 1); /* LBA of last allocatable sector */
5733 st_dword(buf + GPTH_PteSize, SZ_GPTE); /* Size of a table entry */
5734 st_dword(buf + GPTH_PtNum, GPT_ITEMS); /* Number of table entries */
5735 st_dword(buf + GPTH_PtOfs, 2); /* LBA of this table */
5736 rnd = make_rand(rnd, buf + GPTH_DskGuid, 16); /* Disk GUID */
5737 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5738 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5739 if (disk_write(drv, buf, 1, 1) != RES_OK) return FR_DISK_ERR;
5740
5741 /* Create secondary GPT header */
5742 st_qword(buf + GPTH_CurLba, sz_drv - 1); /* LBA of this header */
5743 st_qword(buf + GPTH_BakLba, 1); /* LBA of primary header */
5744 st_qword(buf + GPTH_PtOfs, top_bpt); /* LBA of this table */
5745 st_dword(buf + GPTH_Bcc, 0);
5746 for (i = 0, bcc= 0xFFFFFFFF; i < 92; bcc = crc32(bcc, buf[i++])) ; /* Calculate header check sum */
5747 st_dword(buf + GPTH_Bcc, ~bcc); /* Header check sum */
5748 if (disk_write(drv, buf, sz_drv - 1, 1) != RES_OK) return FR_DISK_ERR;
5749
5750 /* Create protective MBR */
5751 memset(buf, 0, ss);
5752 memcpy(buf + MBR_Table, gpt_mbr, 16); /* Create a GPT partition */
5753 st_word(buf + BS_55AA, 0xAA55);
5754 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR;
5755
5756 } else
5757 #endif
5758 { /* Create partitions in MBR format */
5759 sz_drv32 = (DWORD)sz_drv;
5760 n_sc = N_SEC_TRACK; /* Determine drive CHS without any consideration of the drive geometry */
5761 for (n_hd = 8; n_hd != 0 && sz_drv32 / n_hd / n_sc > 1024; n_hd *= 2) ;
5762 if (n_hd == 0) n_hd = 255; /* Number of heads needs to be <256 */
5763
5764 memset(buf, 0, FF_MAX_SS); /* Clear MBR */
5765 pte = buf + MBR_Table; /* Partition table in the MBR */
5766 for (i = 0, nxt_alloc32 = n_sc; i < 4 && nxt_alloc32 != 0 && nxt_alloc32 < sz_drv32; i++, nxt_alloc32 += sz_part32) {
5767 sz_part32 = (DWORD)plst[i]; /* Get partition size */
5768 if (sz_part32 <= 100) sz_part32 = (sz_part32 == 100) ? sz_drv32 : sz_drv32 / 100 * sz_part32; /* Size in percentage? */
5769 if (nxt_alloc32 + sz_part32 > sz_drv32 || nxt_alloc32 + sz_part32 < nxt_alloc32) sz_part32 = sz_drv32 - nxt_alloc32; /* Clip at drive size */
5770 if (sz_part32 == 0) break; /* End of table or no sector to allocate? */
5771
5772 st_dword(pte + PTE_StLba, nxt_alloc32); /* Start LBA */
5773 st_dword(pte + PTE_SizLba, sz_part32); /* Number of sectors */
5774 pte[PTE_System] = sys; /* System type */
5775
5776 cy = (UINT)(nxt_alloc32 / n_sc / n_hd); /* Start cylinder */
5777 hd = (BYTE)(nxt_alloc32 / n_sc % n_hd); /* Start head */
5778 sc = (BYTE)(nxt_alloc32 % n_sc + 1); /* Start sector */
5779 pte[PTE_StHead] = hd;
5780 pte[PTE_StSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5781 pte[PTE_StCyl] = (BYTE)cy;
5782
5783 cy = (UINT)((nxt_alloc32 + sz_part32 - 1) / n_sc / n_hd); /* End cylinder */
5784 hd = (BYTE)((nxt_alloc32 + sz_part32 - 1) / n_sc % n_hd); /* End head */
5785 sc = (BYTE)((nxt_alloc32 + sz_part32 - 1) % n_sc + 1); /* End sector */
5786 pte[PTE_EdHead] = hd;
5787 pte[PTE_EdSec] = (BYTE)((cy >> 2 & 0xC0) | sc);
5788 pte[PTE_EdCyl] = (BYTE)cy;
5789
5790 pte += SZ_PTE; /* Next entry */
5791 }
5792
5793 st_word(buf + BS_55AA, 0xAA55); /* MBR signature */
5794 if (disk_write(drv, buf, 0, 1) != RES_OK) return FR_DISK_ERR; /* Write it to the MBR */
5795 }
5796
5797 return FR_OK;
5798 }
5799
5800
5801
5802 FRESULT f_mkfs (
5803 const TCHAR* path, /* Logical drive number */
5804 const MKFS_PARM* opt, /* Format options */
5805 void* work, /* Pointer to working buffer (null: use heap memory) */
5806 UINT len /* Size of working buffer [byte] */
5807 )
5808 {
5809 static const WORD cst[] = {1, 4, 16, 64, 256, 512, 0}; /* Cluster size boundary for FAT volume (4Ks unit) */
5810 static const WORD cst32[] = {1, 2, 4, 8, 16, 32, 0}; /* Cluster size boundary for FAT32 volume (128Ks unit) */
5811 static const MKFS_PARM defopt = {FM_ANY, 0, 0, 0, 0}; /* Default parameter */
5812 BYTE fsopt, fsty, sys, *buf, *pte, pdrv, ipart;
5813 WORD ss; /* Sector size */
5814 DWORD sz_buf, sz_blk, n_clst, pau, nsect, n, vsn;
5815 LBA_t sz_vol, b_vol, b_fat, b_data; /* Size of volume, Base LBA of volume, fat, data */
5816 LBA_t sect, lba[2];
5817 DWORD sz_rsv, sz_fat, sz_dir, sz_au; /* Size of reserved, fat, dir, data, cluster */
5818 UINT n_fat, n_root, i; /* Index, Number of FATs and Number of roor dir entries */
5819 int vol;
5820 DSTATUS ds;
5821 FRESULT fr;
5822
5823
5824 /* Check mounted drive and clear work area */
5825 vol = get_ldnumber(&path); /* Get target logical drive */
5826 if (vol < 0) return FR_INVALID_DRIVE;
5827 if (FatFs[vol]) FatFs[vol]->fs_type = 0; /* Clear the fs object if mounted */
5828 pdrv = LD2PD(vol); /* Physical drive */
5829 ipart = LD2PT(vol); /* Partition (0:create as new, 1..:get from partition table) */
5830 if (!opt) opt = &defopt; /* Use default parameter if it is not given */
5831
5832 /* Get physical drive status (sz_drv, sz_blk, ss) */
5833 ds = disk_initialize(pdrv);
5834 if (ds & STA_NOINIT) return FR_NOT_READY;
5835 if (ds & STA_PROTECT) return FR_WRITE_PROTECTED;
5836 sz_blk = opt->align;
5837 if (sz_blk == 0 && disk_ioctl(pdrv, GET_BLOCK_SIZE, &sz_blk) != RES_OK) sz_blk = 1;
5838 if (sz_blk == 0 || sz_blk > 0x8000 || (sz_blk & (sz_blk - 1))) sz_blk = 1;
5839 #if FF_MAX_SS != FF_MIN_SS
5840 if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &ss) != RES_OK) return FR_DISK_ERR;
5841 if (ss > FF_MAX_SS || ss < FF_MIN_SS || (ss & (ss - 1))) return FR_DISK_ERR;
5842 #else
5843 ss = FF_MAX_SS;
5844 #endif
5845 /* Options for FAT sub-type and FAT parameters */
5846 fsopt = opt->fmt & (FM_ANY | FM_SFD);
5847 n_fat = (opt->n_fat >= 1 && opt->n_fat <= 2) ? opt->n_fat : 1;
5848 n_root = (opt->n_root >= 1 && opt->n_root <= 32768 && (opt->n_root % (ss / SZDIRE)) == 0) ? opt->n_root : 512;
5849 sz_au = (opt->au_size <= 0x1000000 && (opt->au_size & (opt->au_size - 1)) == 0) ? opt->au_size : 0;
5850 sz_au /= ss; /* Byte --> Sector */
5851
5852 /* Get working buffer */
5853 sz_buf = len / ss; /* Size of working buffer [sector] */
5854 if (sz_buf == 0) return FR_NOT_ENOUGH_CORE;
5855 buf = (BYTE*)work; /* Working buffer */
5856 #if FF_USE_LFN == 3
5857 if (!buf) buf = ff_memalloc(sz_buf * ss); /* Use heap memory for working buffer */
5858 #endif
5859 if (!buf) return FR_NOT_ENOUGH_CORE;
5860
5861 /* Determine where the volume to be located (b_vol, sz_vol) */
5862 b_vol = sz_vol = 0;
5863 if (FF_MULTI_PARTITION && ipart != 0) { /* Is the volume associated with any specific partition? */
5864 /* Get partition location from the existing partition table */
5865 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load MBR */
5866 if (ld_word(buf + BS_55AA) != 0xAA55) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if MBR is valid */
5867 #if FF_LBA64
5868 if (buf[MBR_Table + PTE_System] == 0xEE) { /* GPT protective MBR? */
5869 DWORD n_ent, ofs;
5870 QWORD pt_lba;
5871
5872 /* Get the partition location from GPT */
5873 if (disk_read(pdrv, buf, 1, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Load GPT header sector (next to MBR) */
5874 if (!test_gpt_header(buf)) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if GPT header is valid */
5875 n_ent = ld_dword(buf + GPTH_PtNum); /* Number of entries */
5876 pt_lba = ld_qword(buf + GPTH_PtOfs); /* Table start sector */
5877 ofs = i = 0;
5878 while (n_ent) { /* Find MS Basic partition with order of ipart */
5879 if (ofs == 0 && disk_read(pdrv, buf, pt_lba++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Get PT sector */
5880 if (!memcmp(buf + ofs + GPTE_PtGuid, GUID_MS_Basic, 16) && ++i == ipart) { /* MS basic data partition? */
5881 b_vol = ld_qword(buf + ofs + GPTE_FstLba);
5882 sz_vol = ld_qword(buf + ofs + GPTE_LstLba) - b_vol + 1;
5883 break;
5884 }
5885 n_ent--; ofs = (ofs + SZ_GPTE) % ss; /* Next entry */
5886 }
5887 if (n_ent == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* Partition not found */
5888 fsopt |= 0x80; /* Partitioning is in GPT */
5889 } else
5890 #endif
5891 { /* Get the partition location from MBR partition table */
5892 pte = buf + (MBR_Table + (ipart - 1) * SZ_PTE);
5893 if (ipart > 4 || pte[PTE_System] == 0) LEAVE_MKFS(FR_MKFS_ABORTED); /* No partition? */
5894 b_vol = ld_dword(pte + PTE_StLba); /* Get volume start sector */
5895 sz_vol = ld_dword(pte + PTE_SizLba); /* Get volume size */
5896 }
5897 } else { /* The volume is associated with a physical drive */
5898 if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_vol) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5899 if (!(fsopt & FM_SFD)) { /* To be partitioned? */
5900 /* Create a single-partition on the drive in this function */
5901 #if FF_LBA64
5902 if (sz_vol >= FF_MIN_GPT) { /* Which partition type to create, MBR or GPT? */
5903 fsopt |= 0x80; /* Partitioning is in GPT */
5904 b_vol = GPT_ALIGN / ss; sz_vol -= b_vol + GPT_ITEMS * SZ_GPTE / ss + 1; /* Estimated partition offset and size */
5905 } else
5906 #endif
5907 { /* Partitioning is in MBR */
5908 if (sz_vol > N_SEC_TRACK) {
5909 b_vol = N_SEC_TRACK; sz_vol -= b_vol; /* Estimated partition offset and size */
5910 }
5911 }
5912 }
5913 }
5914 if (sz_vol < 128) LEAVE_MKFS(FR_MKFS_ABORTED); /* Check if volume size is >=128s */
5915
5916 /* Now start to create an FAT volume at b_vol and sz_vol */
5917
5918 do { /* Pre-determine the FAT type */
5919 if (FF_FS_EXFAT && (fsopt & FM_EXFAT)) { /* exFAT possible? */
5920 if ((fsopt & FM_ANY) == FM_EXFAT || sz_vol >= 0x4000000 || sz_au > 128) { /* exFAT only, vol >= 64MS or sz_au > 128S ? */
5921 fsty = FS_EXFAT; break;
5922 }
5923 }
5924 #if FF_LBA64
5925 if (sz_vol >= 0x100000000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too large volume for FAT/FAT32 */
5926 #endif
5927 if (sz_au > 128) sz_au = 128; /* Invalid AU for FAT/FAT32? */
5928 if (fsopt & FM_FAT32) { /* FAT32 possible? */
5929 if (!(fsopt & FM_FAT)) { /* no-FAT? */
5930 fsty = FS_FAT32; break;
5931 }
5932 }
5933 if (!(fsopt & FM_FAT)) LEAVE_MKFS(FR_INVALID_PARAMETER); /* no-FAT? */
5934 fsty = FS_FAT16;
5935 } while (0);
5936
5937 vsn = (DWORD)sz_vol + GET_FATTIME(); /* VSN generated from current time and partitiion size */
5938
5939 #if FF_FS_EXFAT
5940 if (fsty == FS_EXFAT) { /* Create an exFAT volume */
5941 DWORD szb_bit, szb_case, sum, nbit, clu, clen[3];
5942 WCHAR ch, si;
5943 UINT j, st;
5944
5945 if (sz_vol < 0x1000) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume for exFAT? */
5946 #if FF_USE_TRIM
5947 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
5948 disk_ioctl(pdrv, CTRL_TRIM, lba);
5949 #endif
5950 /* Determine FAT location, data location and number of clusters */
5951 if (sz_au == 0) { /* AU auto-selection */
5952 sz_au = 8;
5953 if (sz_vol >= 0x80000) sz_au = 64; /* >= 512Ks */
5954 if (sz_vol >= 0x4000000) sz_au = 256; /* >= 64Ms */
5955 }
5956 b_fat = b_vol + 32; /* FAT start at offset 32 */
5957 sz_fat = (DWORD)((sz_vol / sz_au + 2) * 4 + ss - 1) / ss; /* Number of FAT sectors */
5958 b_data = (b_fat + sz_fat + sz_blk - 1) & ~((LBA_t)sz_blk - 1); /* Align data area to the erase block boundary */
5959 if (b_data - b_vol >= sz_vol / 2) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
5960 n_clst = (DWORD)(sz_vol - (b_data - b_vol)) / sz_au; /* Number of clusters */
5961 if (n_clst <16) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too few clusters? */
5962 if (n_clst > MAX_EXFAT) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters? */
5963
5964 szb_bit = (n_clst + 7) / 8; /* Size of allocation bitmap */
5965 clen[0] = (szb_bit + sz_au * ss - 1) / (sz_au * ss); /* Number of allocation bitmap clusters */
5966
5967 /* Create a compressed up-case table */
5968 sect = b_data + sz_au * clen[0]; /* Table start sector */
5969 sum = 0; /* Table checksum to be stored in the 82 entry */
5970 st = 0; si = 0; i = 0; j = 0; szb_case = 0;
5971 do {
5972 switch (st) {
5973 case 0:
5974 ch = (WCHAR)ff_wtoupper(si); /* Get an up-case char */
5975 if (ch != si) {
5976 si++; break; /* Store the up-case char if exist */
5977 }
5978 for (j = 1; (WCHAR)(si + j) && (WCHAR)(si + j) == ff_wtoupper((WCHAR)(si + j)); j++) ; /* Get run length of no-case block */
5979 if (j >= 128) {
5980 ch = 0xFFFF; st = 2; break; /* Compress the no-case block if run is >= 128 chars */
5981 }
5982 st = 1; /* Do not compress short run */
5983 /* FALLTHROUGH */
5984 case 1:
5985 ch = si++; /* Fill the short run */
5986 if (--j == 0) st = 0;
5987 break;
5988
5989 default:
5990 ch = (WCHAR)j; si += (WCHAR)j; /* Number of chars to skip */
5991 st = 0;
5992 }
5993 sum = xsum32(buf[i + 0] = (BYTE)ch, sum); /* Put it into the write buffer */
5994 sum = xsum32(buf[i + 1] = (BYTE)(ch >> 8), sum);
5995 i += 2; szb_case += 2;
5996 if (si == 0 || i == sz_buf * ss) { /* Write buffered data when buffer full or end of process */
5997 n = (i + ss - 1) / ss;
5998 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
5999 sect += n; i = 0;
6000 }
6001 } while (si);
6002 clen[1] = (szb_case + sz_au * ss - 1) / (sz_au * ss); /* Number of up-case table clusters */
6003 clen[2] = 1; /* Number of root dir clusters */
6004
6005 /* Initialize the allocation bitmap */
6006 sect = b_data; nsect = (szb_bit + ss - 1) / ss; /* Start of bitmap and number of bitmap sectors */
6007 nbit = clen[0] + clen[1] + clen[2]; /* Number of clusters in-use by system (bitmap, up-case and root-dir) */
6008 do {
6009 memset(buf, 0, sz_buf * ss); /* Initialize bitmap buffer */
6010 for (i = 0; nbit != 0 && i / 8 < sz_buf * ss; buf[i / 8] |= 1 << (i % 8), i++, nbit--) ; /* Mark used clusters */
6011 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6012 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6013 sect += n; nsect -= n;
6014 } while (nsect);
6015
6016 /* Initialize the FAT */
6017 sect = b_fat; nsect = sz_fat; /* Start of FAT and number of FAT sectors */
6018 j = nbit = clu = 0;
6019 do {
6020 memset(buf, 0, sz_buf * ss); i = 0; /* Clear work area and reset write offset */
6021 if (clu == 0) { /* Initialize FAT [0] and FAT[1] */
6022 st_dword(buf + i, 0xFFFFFFF8); i += 4; clu++;
6023 st_dword(buf + i, 0xFFFFFFFF); i += 4; clu++;
6024 }
6025 do { /* Create chains of bitmap, up-case and root dir */
6026 while (nbit != 0 && i < sz_buf * ss) { /* Create a chain */
6027 st_dword(buf + i, (nbit > 1) ? clu + 1 : 0xFFFFFFFF);
6028 i += 4; clu++; nbit--;
6029 }
6030 if (nbit == 0 && j < 3) nbit = clen[j++]; /* Get next chain length */
6031 } while (nbit != 0 && i < sz_buf * ss);
6032 n = (nsect > sz_buf) ? sz_buf : nsect; /* Write the buffered data */
6033 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6034 sect += n; nsect -= n;
6035 } while (nsect);
6036
6037 /* Initialize the root directory */
6038 memset(buf, 0, sz_buf * ss);
6039 buf[SZDIRE * 0 + 0] = ET_VLABEL; /* Volume label entry (no label) */
6040 buf[SZDIRE * 1 + 0] = ET_BITMAP; /* Bitmap entry */
6041 st_dword(buf + SZDIRE * 1 + 20, 2); /* cluster */
6042 st_dword(buf + SZDIRE * 1 + 24, szb_bit); /* size */
6043 buf[SZDIRE * 2 + 0] = ET_UPCASE; /* Up-case table entry */
6044 st_dword(buf + SZDIRE * 2 + 4, sum); /* sum */
6045 st_dword(buf + SZDIRE * 2 + 20, 2 + clen[0]); /* cluster */
6046 st_dword(buf + SZDIRE * 2 + 24, szb_case); /* size */
6047 sect = b_data + sz_au * (clen[0] + clen[1]); nsect = sz_au; /* Start of the root directory and number of sectors */
6048 do { /* Fill root directory sectors */
6049 n = (nsect > sz_buf) ? sz_buf : nsect;
6050 if (disk_write(pdrv, buf, sect, n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6051 memset(buf, 0, ss); /* Rest of entries are filled with zero */
6052 sect += n; nsect -= n;
6053 } while (nsect);
6054
6055 /* Create two set of the exFAT VBR blocks */
6056 sect = b_vol;
6057 for (n = 0; n < 2; n++) {
6058 /* Main record (+0) */
6059 memset(buf, 0, ss);
6060 memcpy(buf + BS_JmpBoot, "\xEB\x76\x90" "EXFAT ", 11); /* Boot jump code (x86), OEM name */
6061 st_qword(buf + BPB_VolOfsEx, b_vol); /* Volume offset in the physical drive [sector] */
6062 st_qword(buf + BPB_TotSecEx, sz_vol); /* Volume size [sector] */
6063 st_dword(buf + BPB_FatOfsEx, (DWORD)(b_fat - b_vol)); /* FAT offset [sector] */
6064 st_dword(buf + BPB_FatSzEx, sz_fat); /* FAT size [sector] */
6065 st_dword(buf + BPB_DataOfsEx, (DWORD)(b_data - b_vol)); /* Data offset [sector] */
6066 st_dword(buf + BPB_NumClusEx, n_clst); /* Number of clusters */
6067 st_dword(buf + BPB_RootClusEx, 2 + clen[0] + clen[1]); /* Root dir cluster # */
6068 st_dword(buf + BPB_VolIDEx, vsn); /* VSN */
6069 st_word(buf + BPB_FSVerEx, 0x100); /* Filesystem version (1.00) */
6070 for (buf[BPB_BytsPerSecEx] = 0, i = ss; i >>= 1; buf[BPB_BytsPerSecEx]++) ; /* Log2 of sector size [byte] */
6071 for (buf[BPB_SecPerClusEx] = 0, i = sz_au; i >>= 1; buf[BPB_SecPerClusEx]++) ; /* Log2 of cluster size [sector] */
6072 buf[BPB_NumFATsEx] = 1; /* Number of FATs */
6073 buf[BPB_DrvNumEx] = 0x80; /* Drive number (for int13) */
6074 st_word(buf + BS_BootCodeEx, 0xFEEB); /* Boot code (x86) */
6075 st_word(buf + BS_55AA, 0xAA55); /* Signature (placed here regardless of sector size) */
6076 for (i = sum = 0; i < ss; i++) { /* VBR checksum */
6077 if (i != BPB_VolFlagEx && i != BPB_VolFlagEx + 1 && i != BPB_PercInUseEx) sum = xsum32(buf[i], sum);
6078 }
6079 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6080 /* Extended bootstrap record (+1..+8) */
6081 memset(buf, 0, ss);
6082 st_word(buf + ss - 2, 0xAA55); /* Signature (placed at end of sector) */
6083 for (j = 1; j < 9; j++) {
6084 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6085 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6086 }
6087 /* OEM/Reserved record (+9..+10) */
6088 memset(buf, 0, ss);
6089 for ( ; j < 11; j++) {
6090 for (i = 0; i < ss; sum = xsum32(buf[i++], sum)) ; /* VBR checksum */
6091 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6092 }
6093 /* Sum record (+11) */
6094 for (i = 0; i < ss; i += 4) st_dword(buf + i, sum); /* Fill with checksum value */
6095 if (disk_write(pdrv, buf, sect++, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6096 }
6097
6098 } else
6099 #endif /* FF_FS_EXFAT */
6100 { /* Create an FAT/FAT32 volume */
6101 do {
6102 pau = sz_au;
6103 /* Pre-determine number of clusters and FAT sub-type */
6104 if (fsty == FS_FAT32) { /* FAT32 volume */
6105 if (pau == 0) { /* AU auto-selection */
6106 n = (DWORD)sz_vol / 0x20000; /* Volume size in unit of 128KS */
6107 for (i = 0, pau = 1; cst32[i] && cst32[i] <= n; i++, pau <<= 1) ; /* Get from table */
6108 }
6109 n_clst = (DWORD)sz_vol / pau; /* Number of clusters */
6110 sz_fat = (n_clst * 4 + 8 + ss - 1) / ss; /* FAT size [sector] */
6111 sz_rsv = 32; /* Number of reserved sectors */
6112 sz_dir = 0; /* No static directory */
6113 if (n_clst <= MAX_FAT16 || n_clst > MAX_FAT32) LEAVE_MKFS(FR_MKFS_ABORTED);
6114 } else { /* FAT volume */
6115 if (pau == 0) { /* au auto-selection */
6116 n = (DWORD)sz_vol / 0x1000; /* Volume size in unit of 4KS */
6117 for (i = 0, pau = 1; cst[i] && cst[i] <= n; i++, pau <<= 1) ; /* Get from table */
6118 }
6119 n_clst = (DWORD)sz_vol / pau;
6120 if (n_clst > MAX_FAT12) {
6121 n = n_clst * 2 + 4; /* FAT size [byte] */
6122 } else {
6123 fsty = FS_FAT12;
6124 n = (n_clst * 3 + 1) / 2 + 3; /* FAT size [byte] */
6125 }
6126 sz_fat = (n + ss - 1) / ss; /* FAT size [sector] */
6127 sz_rsv = 1; /* Number of reserved sectors */
6128 sz_dir = (DWORD)n_root * SZDIRE / ss; /* Root dir size [sector] */
6129 }
6130 b_fat = b_vol + sz_rsv; /* FAT base */
6131 b_data = b_fat + sz_fat * n_fat + sz_dir; /* Data base */
6132
6133 /* Align data area to erase block boundary (for flash memory media) */
6134 n = (DWORD)(((b_data + sz_blk - 1) & ~(sz_blk - 1)) - b_data); /* Sectors to next nearest from current data base */
6135 if (fsty == FS_FAT32) { /* FAT32: Move FAT */
6136 sz_rsv += n; b_fat += n;
6137 } else { /* FAT: Expand FAT */
6138 if (n % n_fat) { /* Adjust fractional error if needed */
6139 n--; sz_rsv++; b_fat++;
6140 }
6141 sz_fat += n / n_fat;
6142 }
6143
6144 /* Determine number of clusters and final check of validity of the FAT sub-type */
6145 if (sz_vol < b_data + pau * 16 - b_vol) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too small volume? */
6146 n_clst = ((DWORD)sz_vol - sz_rsv - sz_fat * n_fat - sz_dir) / pau;
6147 if (fsty == FS_FAT32) {
6148 if (n_clst <= MAX_FAT16) { /* Too few clusters for FAT32? */
6149 if (sz_au == 0 && (sz_au = pau / 2) != 0) continue; /* Adjust cluster size and retry */
6150 LEAVE_MKFS(FR_MKFS_ABORTED);
6151 }
6152 }
6153 if (fsty == FS_FAT16) {
6154 if (n_clst > MAX_FAT16) { /* Too many clusters for FAT16 */
6155 if (sz_au == 0 && (pau * 2) <= 64) {
6156 sz_au = pau * 2; continue; /* Adjust cluster size and retry */
6157 }
6158 if ((fsopt & FM_FAT32)) {
6159 fsty = FS_FAT32; continue; /* Switch type to FAT32 and retry */
6160 }
6161 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6162 LEAVE_MKFS(FR_MKFS_ABORTED);
6163 }
6164 if (n_clst <= MAX_FAT12) { /* Too few clusters for FAT16 */
6165 if (sz_au == 0 && (sz_au = pau * 2) <= 128) continue; /* Adjust cluster size and retry */
6166 LEAVE_MKFS(FR_MKFS_ABORTED);
6167 }
6168 }
6169 if (fsty == FS_FAT12 && n_clst > MAX_FAT12) LEAVE_MKFS(FR_MKFS_ABORTED); /* Too many clusters for FAT12 */
6170
6171 /* Ok, it is the valid cluster configuration */
6172 break;
6173 } while (1);
6174
6175 #if FF_USE_TRIM
6176 lba[0] = b_vol; lba[1] = b_vol + sz_vol - 1; /* Inform storage device that the volume area may be erased */
6177 disk_ioctl(pdrv, CTRL_TRIM, lba);
6178 #endif
6179 /* Create FAT VBR */
6180 memset(buf, 0, ss);
6181 memcpy(buf + BS_JmpBoot, "\xEB\xFE\x90" "MSDOS5.0", 11); /* Boot jump code (x86), OEM name */
6182 st_word(buf + BPB_BytsPerSec, ss); /* Sector size [byte] */
6183 buf[BPB_SecPerClus] = (BYTE)pau; /* Cluster size [sector] */
6184 st_word(buf + BPB_RsvdSecCnt, (WORD)sz_rsv); /* Size of reserved area */
6185 buf[BPB_NumFATs] = (BYTE)n_fat; /* Number of FATs */
6186 st_word(buf + BPB_RootEntCnt, (WORD)((fsty == FS_FAT32) ? 0 : n_root)); /* Number of root directory entries */
6187 if (sz_vol < 0x10000) {
6188 st_word(buf + BPB_TotSec16, (WORD)sz_vol); /* Volume size in 16-bit LBA */
6189 } else {
6190 st_dword(buf + BPB_TotSec32, (DWORD)sz_vol); /* Volume size in 32-bit LBA */
6191 }
6192 buf[BPB_Media] = 0xF8; /* Media descriptor byte */
6193 st_word(buf + BPB_SecPerTrk, 63); /* Number of sectors per track (for int13) */
6194 st_word(buf + BPB_NumHeads, 255); /* Number of heads (for int13) */
6195 st_dword(buf + BPB_HiddSec, (DWORD)b_vol); /* Volume offset in the physical drive [sector] */
6196 if (fsty == FS_FAT32) {
6197 st_dword(buf + BS_VolID32, vsn); /* VSN */
6198 st_dword(buf + BPB_FATSz32, sz_fat); /* FAT size [sector] */
6199 st_dword(buf + BPB_RootClus32, 2); /* Root directory cluster # (2) */
6200 st_word(buf + BPB_FSInfo32, 1); /* Offset of FSINFO sector (VBR + 1) */
6201 st_word(buf + BPB_BkBootSec32, 6); /* Offset of backup VBR (VBR + 6) */
6202 buf[BS_DrvNum32] = 0x80; /* Drive number (for int13) */
6203 buf[BS_BootSig32] = 0x29; /* Extended boot signature */
6204 memcpy(buf + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
6205 } else {
6206 st_dword(buf + BS_VolID, vsn); /* VSN */
6207 st_word(buf + BPB_FATSz16, (WORD)sz_fat); /* FAT size [sector] */
6208 buf[BS_DrvNum] = 0x80; /* Drive number (for int13) */
6209 buf[BS_BootSig] = 0x29; /* Extended boot signature */
6210 // u-boot requires FAT signature to be FAT12 or FAT16. Previously this was just "FAT "
6211 if (fsty == FS_FAT12)
6212 memcpy(buf + BS_VolLab, "NO NAME " "FAT12 ", 19); /* Volume label, FAT signature */
6213 else
6214 memcpy(buf + BS_VolLab, "NO NAME " "FAT16 ", 19); /* Volume label, FAT signature */
6215 }
6216 st_word(buf + BS_55AA, 0xAA55); /* Signature (offset is fixed here regardless of sector size) */
6217 if (disk_write(pdrv, buf, b_vol, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it to the VBR sector */
6218
6219 /* Create FSINFO record if needed */
6220 if (fsty == FS_FAT32) {
6221 disk_write(pdrv, buf, b_vol + 6, 1); /* Write backup VBR (VBR + 6) */
6222 memset(buf, 0, ss);
6223 st_dword(buf + FSI_LeadSig, 0x41615252);
6224 st_dword(buf + FSI_StrucSig, 0x61417272);
6225 st_dword(buf + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
6226 st_dword(buf + FSI_Nxt_Free, 2); /* Last allocated cluster# */
6227 st_word(buf + BS_55AA, 0xAA55);
6228 disk_write(pdrv, buf, b_vol + 7, 1); /* Write backup FSINFO (VBR + 7) */
6229 disk_write(pdrv, buf, b_vol + 1, 1); /* Write original FSINFO (VBR + 1) */
6230 }
6231
6232 /* Initialize FAT area */
6233 memset(buf, 0, sz_buf * ss);
6234 sect = b_fat; /* FAT start sector */
6235 for (i = 0; i < n_fat; i++) { /* Initialize FATs each */
6236 if (fsty == FS_FAT32) {
6237 st_dword(buf + 0, 0xFFFFFFF8); /* FAT[0] */
6238 st_dword(buf + 4, 0xFFFFFFFF); /* FAT[1] */
6239 st_dword(buf + 8, 0x0FFFFFFF); /* FAT[2] (root directory) */
6240 } else {
6241 st_dword(buf + 0, (fsty == FS_FAT12) ? 0xFFFFF8 : 0xFFFFFFF8); /* FAT[0] and FAT[1] */
6242 }
6243 nsect = sz_fat; /* Number of FAT sectors */
6244 do { /* Fill FAT sectors */
6245 n = (nsect > sz_buf) ? sz_buf : nsect;
6246 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6247 memset(buf, 0, ss); /* Rest of FAT all are cleared */
6248 sect += n; nsect -= n;
6249 } while (nsect);
6250 }
6251
6252 /* Initialize root directory (fill with zero) */
6253 nsect = (fsty == FS_FAT32) ? pau : sz_dir; /* Number of root directory sectors */
6254 do {
6255 n = (nsect > sz_buf) ? sz_buf : nsect;
6256 if (disk_write(pdrv, buf, sect, (UINT)n) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6257 sect += n; nsect -= n;
6258 } while (nsect);
6259 }
6260
6261 /* A FAT volume has been created here */
6262
6263 /* Determine system ID in the MBR partition table */
6264 if (FF_FS_EXFAT && fsty == FS_EXFAT) {
6265 sys = 0x07; /* exFAT */
6266 } else {
6267 if (fsty == FS_FAT32) {
6268 sys = 0x0C; /* FAT32X */
6269 } else {
6270 if (sz_vol >= 0x10000) {
6271 sys = 0x06; /* FAT12/16 (large) */
6272 } else {
6273 sys = (fsty == FS_FAT16) ? 0x04 : 0x01; /* FAT16 : FAT12 */
6274 }
6275 }
6276 }
6277
6278 /* Update partition information */
6279 if (FF_MULTI_PARTITION && ipart != 0) { /* Volume is in the existing partition */
6280 if (!FF_LBA64 || !(fsopt & 0x80)) {
6281 /* Update system ID in the partition table */
6282 if (disk_read(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Read the MBR */
6283 buf[MBR_Table + (ipart - 1) * SZ_PTE + PTE_System] = sys; /* Set system ID */
6284 if (disk_write(pdrv, buf, 0, 1) != RES_OK) LEAVE_MKFS(FR_DISK_ERR); /* Write it back to the MBR */
6285 }
6286 } else { /* Volume as a new single partition */
6287 if (!(fsopt & FM_SFD)) { /* Create partition table if not in SFD */
6288 lba[0] = sz_vol; lba[1] = 0;
6289 fr = create_partition(pdrv, lba, sys, buf);
6290 if (fr != FR_OK) LEAVE_MKFS(fr);
6291 }
6292 }
6293
6294 if (disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) LEAVE_MKFS(FR_DISK_ERR);
6295
6296 LEAVE_MKFS(FR_OK);
6297 }
6298
6299
6300
6301
6302 #if FF_MULTI_PARTITION
6303 /*-----------------------------------------------------------------------*/
6304 /* Create Partition Table on the Physical Drive */
6305 /*-----------------------------------------------------------------------*/
6306
6307 FRESULT f_fdisk (
6308 BYTE pdrv, /* Physical drive number */
6309 const LBA_t ptbl[], /* Pointer to the size table for each partitions */
6310 void* work /* Pointer to the working buffer (null: use heap memory) */
6311 )
6312 {
6313 BYTE *buf = (BYTE*)work;
6314 DSTATUS stat;
6315
6316
6317 stat = disk_initialize(pdrv);
6318 if (stat & STA_NOINIT) return FR_NOT_READY;
6319 if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
6320 #if FF_USE_LFN == 3
6321 if (!buf) buf = ff_memalloc(FF_MAX_SS); /* Use heap memory for working buffer */
6322 #endif
6323 if (!buf) return FR_NOT_ENOUGH_CORE;
6324
6325 LEAVE_MKFS(create_partition(pdrv, ptbl, 0x07, buf));
6326 }
6327
6328 #endif /* FF_MULTI_PARTITION */
6329 #endif /* !FF_FS_READONLY && FF_USE_MKFS */
6330
6331
6332
6333
6334 #if FF_USE_STRFUNC
6335 #if FF_USE_LFN && FF_LFN_UNICODE && (FF_STRF_ENCODE < 0 || FF_STRF_ENCODE > 3)
6336 #error Wrong FF_STRF_ENCODE setting
6337 #endif
6338 /*-----------------------------------------------------------------------*/
6339 /* Get a String from the File */
6340 /*-----------------------------------------------------------------------*/
6341
6342 TCHAR* f_gets (
6343 TCHAR* buff, /* Pointer to the buffer to store read string */
6344 int len, /* Size of string buffer (items) */
6345 FIL* fp /* Pointer to the file object */
6346 )
6347 {
6348 int nc = 0;
6349 TCHAR *p = buff;
6350 BYTE s[4];
6351 UINT rc;
6352 DWORD dc;
6353 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE <= 2
6354 WCHAR wc;
6355 #endif
6356 #if FF_USE_LFN && FF_LFN_UNICODE && FF_STRF_ENCODE == 3
6357 UINT ct;
6358 #endif
6359
6360 #if FF_USE_LFN && FF_LFN_UNICODE /* With code conversion (Unicode API) */
6361 /* Make a room for the character and terminator */
6362 if (FF_LFN_UNICODE == 1) len -= (FF_STRF_ENCODE == 0) ? 1 : 2;
6363 if (FF_LFN_UNICODE == 2) len -= (FF_STRF_ENCODE == 0) ? 3 : 4;
6364 if (FF_LFN_UNICODE == 3) len -= 1;
6365 while (nc < len) {
6366 #if FF_STRF_ENCODE == 0 /* Read a character in ANSI/OEM */
6367 f_read(fp, s, 1, &rc); /* Get a code unit */
6368 if (rc != 1) break; /* EOF? */
6369 wc = s[0];
6370 if (dbc_1st((BYTE)wc)) { /* DBC 1st byte? */
6371 f_read(fp, s, 1, &rc); /* Get 2nd byte */
6372 if (rc != 1 || !dbc_2nd(s[0])) continue; /* Wrong code? */
6373 wc = wc << 8 | s[0];
6374 }
6375 dc = ff_oem2uni(wc, CODEPAGE); /* Convert ANSI/OEM into Unicode */
6376 if (dc == 0) continue; /* Conversion error? */
6377 #elif FF_STRF_ENCODE == 1 || FF_STRF_ENCODE == 2 /* Read a character in UTF-16LE/BE */
6378 f_read(fp, s, 2, &rc); /* Get a code unit */
6379 if (rc != 2) break; /* EOF? */
6380 dc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6381 if (IsSurrogateL(dc)) continue; /* Broken surrogate pair? */
6382 if (IsSurrogateH(dc)) { /* High surrogate? */
6383 f_read(fp, s, 2, &rc); /* Get low surrogate */
6384 if (rc != 2) break; /* EOF? */
6385 wc = (FF_STRF_ENCODE == 1) ? ld_word(s) : s[0] << 8 | s[1];
6386 if (!IsSurrogateL(wc)) continue; /* Broken surrogate pair? */
6387 dc = ((dc & 0x3FF) + 0x40) << 10 | (wc & 0x3FF); /* Merge surrogate pair */
6388 }
6389 #else /* Read a character in UTF-8 */
6390 f_read(fp, s, 1, &rc); /* Get a code unit */
6391 if (rc != 1) break; /* EOF? */
6392 dc = s[0];
6393 if (dc >= 0x80) { /* Multi-byte sequence? */
6394 ct = 0;
6395 if ((dc & 0xE0) == 0xC0) { dc &= 0x1F; ct = 1; } /* 2-byte sequence? */
6396 if ((dc & 0xF0) == 0xE0) { dc &= 0x0F; ct = 2; } /* 3-byte sequence? */
6397 if ((dc & 0xF8) == 0xF0) { dc &= 0x07; ct = 3; } /* 4-byte sequence? */
6398 if (ct == 0) continue;
6399 f_read(fp, s, ct, &rc); /* Get trailing bytes */
6400 if (rc != ct) break;
6401 rc = 0;
6402 do { /* Merge the byte sequence */
6403 if ((s[rc] & 0xC0) != 0x80) break;
6404 dc = dc << 6 | (s[rc] & 0x3F);
6405 } while (++rc < ct);
6406 if (rc != ct || dc < 0x80 || IsSurrogate(dc) || dc >= 0x110000) continue; /* Wrong encoding? */
6407 }
6408 #endif
6409 /* A code point is avaialble in dc to be output */
6410
6411 if (FF_USE_STRFUNC == 2 && dc == '\r') continue; /* Strip \r off if needed */
6412 #if FF_LFN_UNICODE == 1 || FF_LFN_UNICODE == 3 /* Output it in UTF-16/32 encoding */
6413 if (FF_LFN_UNICODE == 1 && dc >= 0x10000) { /* Out of BMP at UTF-16? */
6414 *p++ = (TCHAR)(0xD800 | ((dc >> 10) - 0x40)); nc++; /* Make and output high surrogate */
6415 dc = 0xDC00 | (dc & 0x3FF); /* Make low surrogate */
6416 }
6417 *p++ = (TCHAR)dc; nc++;
6418 if (dc == '\n') break; /* End of line? */
6419 #elif FF_LFN_UNICODE == 2 /* Output it in UTF-8 encoding */
6420 if (dc < 0x80) { /* Single byte? */
6421 *p++ = (TCHAR)dc;
6422 nc++;
6423 if (dc == '\n') break; /* End of line? */
6424 } else {
6425 if (dc < 0x800) { /* 2-byte sequence? */
6426 *p++ = (TCHAR)(0xC0 | (dc >> 6 & 0x1F));
6427 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6428 nc += 2;
6429 } else {
6430 if (dc < 0x10000) { /* 3-byte sequence? */
6431 *p++ = (TCHAR)(0xE0 | (dc >> 12 & 0x0F));
6432 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6433 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6434 nc += 3;
6435 } else { /* 4-byte sequence? */
6436 *p++ = (TCHAR)(0xF0 | (dc >> 18 & 0x07));
6437 *p++ = (TCHAR)(0x80 | (dc >> 12 & 0x3F));
6438 *p++ = (TCHAR)(0x80 | (dc >> 6 & 0x3F));
6439 *p++ = (TCHAR)(0x80 | (dc >> 0 & 0x3F));
6440 nc += 4;
6441 }
6442 }
6443 }
6444 #endif
6445 }
6446
6447 #else /* Byte-by-byte read without any conversion (ANSI/OEM API) */
6448 len -= 1; /* Make a room for the terminator */
6449 while (nc < len) {
6450 f_read(fp, s, 1, &rc); /* Get a byte */
6451 if (rc != 1) break; /* EOF? */
6452 dc = s[0];
6453 if (FF_USE_STRFUNC == 2 && dc == '\r') continue;
6454 *p++ = (TCHAR)dc; nc++;
6455 if (dc == '\n') break;
6456 }
6457 #endif
6458
6459 *p = 0; /* Terminate the string */
6460 return nc ? buff : 0; /* When no data read due to EOF or error, return with error. */
6461 }
6462
6463
6464
6465
6466 #if !FF_FS_READONLY
6467 #include <stdarg.h>
6468 #define SZ_PUTC_BUF 64
6469 #define SZ_NUM_BUF 32
6470
6471 /*-----------------------------------------------------------------------*/
6472 /* Put a Character to the File (with sub-functions) */
6473 /*-----------------------------------------------------------------------*/
6474
6475 /* Output buffer and work area */
6476
6477 typedef struct {
6478 FIL *fp; /* Ptr to the writing file */
6479 int idx, nchr; /* Write index of buf[] (-1:error), number of encoding units written */
6480 #if FF_USE_LFN && FF_LFN_UNICODE == 1
6481 WCHAR hs;
6482 #elif FF_USE_LFN && FF_LFN_UNICODE == 2
6483 BYTE bs[4];
6484 UINT wi, ct;
6485 #endif
6486 BYTE buf[SZ_PUTC_BUF]; /* Write buffer */
6487 } putbuff;
6488
6489
6490 /* Buffered file write with code conversion */
6491
6492 static void putc_bfd (putbuff* pb, TCHAR c)
6493 {
6494 UINT n;
6495 int i, nc;
6496 #if FF_USE_LFN && FF_LFN_UNICODE
6497 WCHAR hs, wc;
6498 #if FF_LFN_UNICODE == 2
6499 DWORD dc;
6500 const TCHAR *tp;
6501 #endif
6502 #endif
6503
6504 if (FF_USE_STRFUNC == 2 && c == '\n') { /* LF -> CRLF conversion */
6505 putc_bfd(pb, '\r');
6506 }
6507
6508 i = pb->idx; /* Write index of pb->buf[] */
6509 if (i < 0) return; /* In write error? */
6510 nc = pb->nchr; /* Write unit counter */
6511
6512 #if FF_USE_LFN && FF_LFN_UNICODE
6513 #if FF_LFN_UNICODE == 1 /* UTF-16 input */
6514 if (IsSurrogateH(c)) { /* High surrogate? */
6515 pb->hs = c; return; /* Save it for next */
6516 }
6517 hs = pb->hs; pb->hs = 0;
6518 if (hs != 0) { /* There is a leading high surrogate */
6519 if (!IsSurrogateL(c)) hs = 0; /* Discard high surrogate if not a surrogate pair */
6520 } else {
6521 if (IsSurrogateL(c)) return; /* Discard stray low surrogate */
6522 }
6523 wc = c;
6524 #elif FF_LFN_UNICODE == 2 /* UTF-8 input */
6525 for (;;) {
6526 if (pb->ct == 0) { /* Out of multi-byte sequence? */
6527 pb->bs[pb->wi = 0] = (BYTE)c; /* Save 1st byte */
6528 if ((BYTE)c < 0x80) break; /* Single byte? */
6529 if (((BYTE)c & 0xE0) == 0xC0) pb->ct = 1; /* 2-byte sequence? */
6530 if (((BYTE)c & 0xF0) == 0xE0) pb->ct = 2; /* 3-byte sequence? */
6531 if (((BYTE)c & 0xF1) == 0xF0) pb->ct = 3; /* 4-byte sequence? */
6532 return;
6533 } else { /* In the multi-byte sequence */
6534 if (((BYTE)c & 0xC0) != 0x80) { /* Broken sequence? */
6535 pb->ct = 0; continue;
6536 }
6537 pb->bs[++pb->wi] = (BYTE)c; /* Save the trailing byte */
6538 if (--pb->ct == 0) break; /* End of multi-byte sequence? */
6539 return;
6540 }
6541 }
6542 tp = (const TCHAR*)pb->bs;
6543 dc = tchar2uni(&tp); /* UTF-8 ==> UTF-16 */
6544 if (dc == 0xFFFFFFFF) return; /* Wrong code? */
6545 wc = (WCHAR)dc;
6546 hs = (WCHAR)(dc >> 16);
6547 #elif FF_LFN_UNICODE == 3 /* UTF-32 input */
6548 if (IsSurrogate(c) || c >= 0x110000) return; /* Discard invalid code */
6549 if (c >= 0x10000) { /* Out of BMP? */
6550 hs = (WCHAR)(0xD800 | ((c >> 10) - 0x40)); /* Make high surrogate */
6551 wc = 0xDC00 | (c & 0x3FF); /* Make low surrogate */
6552 } else {
6553 hs = 0;
6554 wc = (WCHAR)c;
6555 }
6556 #endif
6557 /* A code point in UTF-16 is available in hs and wc */
6558
6559 #if FF_STRF_ENCODE == 1 /* Write a code point in UTF-16LE */
6560 if (hs != 0) { /* Surrogate pair? */
6561 st_word(&pb->buf[i], hs);
6562 i += 2;
6563 nc++;
6564 }
6565 st_word(&pb->buf[i], wc);
6566 i += 2;
6567 #elif FF_STRF_ENCODE == 2 /* Write a code point in UTF-16BE */
6568 if (hs != 0) { /* Surrogate pair? */
6569 pb->buf[i++] = (BYTE)(hs >> 8);
6570 pb->buf[i++] = (BYTE)hs;
6571 nc++;
6572 }
6573 pb->buf[i++] = (BYTE)(wc >> 8);
6574 pb->buf[i++] = (BYTE)wc;
6575 #elif FF_STRF_ENCODE == 3 /* Write a code point in UTF-8 */
6576 if (hs != 0) { /* 4-byte sequence? */
6577 nc += 3;
6578 hs = (hs & 0x3FF) + 0x40;
6579 pb->buf[i++] = (BYTE)(0xF0 | hs >> 8);
6580 pb->buf[i++] = (BYTE)(0x80 | (hs >> 2 & 0x3F));
6581 pb->buf[i++] = (BYTE)(0x80 | (hs & 3) << 4 | (wc >> 6 & 0x0F));
6582 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6583 } else {
6584 if (wc < 0x80) { /* Single byte? */
6585 pb->buf[i++] = (BYTE)wc;
6586 } else {
6587 if (wc < 0x800) { /* 2-byte sequence? */
6588 nc += 1;
6589 pb->buf[i++] = (BYTE)(0xC0 | wc >> 6);
6590 } else { /* 3-byte sequence */
6591 nc += 2;
6592 pb->buf[i++] = (BYTE)(0xE0 | wc >> 12);
6593 pb->buf[i++] = (BYTE)(0x80 | (wc >> 6 & 0x3F));
6594 }
6595 pb->buf[i++] = (BYTE)(0x80 | (wc & 0x3F));
6596 }
6597 }
6598 #else /* Write a code point in ANSI/OEM */
6599 if (hs != 0) return;
6600 wc = ff_uni2oem(wc, CODEPAGE); /* UTF-16 ==> ANSI/OEM */
6601 if (wc == 0) return;
6602 if (wc >= 0x100) {
6603 pb->buf[i++] = (BYTE)(wc >> 8); nc++;
6604 }
6605 pb->buf[i++] = (BYTE)wc;
6606 #endif
6607
6608 #else /* ANSI/OEM input (without re-encoding) */
6609 pb->buf[i++] = (BYTE)c;
6610 #endif
6611
6612 if (i >= (int)(sizeof pb->buf) - 4) { /* Write buffered characters to the file */
6613 f_write(pb->fp, pb->buf, (UINT)i, &n);
6614 i = (n == (UINT)i) ? 0 : -1;
6615 }
6616 pb->idx = i;
6617 pb->nchr = nc + 1;
6618 }
6619
6620
6621 /* Flush remaining characters in the buffer */
6622
6623 static int putc_flush (putbuff* pb)
6624 {
6625 UINT nw;
6626
6627 if ( pb->idx >= 0 /* Flush buffered characters to the file */
6628 && f_write(pb->fp, pb->buf, (UINT)pb->idx, &nw) == FR_OK
6629 && (UINT)pb->idx == nw) return pb->nchr;
6630 return -1;
6631 }
6632
6633
6634 /* Initialize write buffer */
6635
6636 static void putc_init (putbuff* pb, FIL* fp)
6637 {
6638 memset(pb, 0, sizeof (putbuff));
6639 pb->fp = fp;
6640 }
6641
6642
6643
6644 int f_putc (
6645 TCHAR c, /* A character to be output */
6646 FIL* fp /* Pointer to the file object */
6647 )
6648 {
6649 putbuff pb;
6650
6651
6652 putc_init(&pb, fp);
6653 putc_bfd(&pb, c); /* Put the character */
6654 return putc_flush(&pb);
6655 }
6656
6657
6658
6659
6660 /*-----------------------------------------------------------------------*/
6661 /* Put a String to the File */
6662 /*-----------------------------------------------------------------------*/
6663
6664 int f_puts (
6665 const TCHAR* str, /* Pointer to the string to be output */
6666 FIL* fp /* Pointer to the file object */
6667 )
6668 {
6669 putbuff pb;
6670
6671
6672 putc_init(&pb, fp);
6673 while (*str) putc_bfd(&pb, *str++); /* Put the string */
6674 return putc_flush(&pb);
6675 }
6676
6677
6678
6679
6680 /*-----------------------------------------------------------------------*/
6681 /* Put a Formatted String to the File (with sub-functions) */
6682 /*-----------------------------------------------------------------------*/
6683 #if FF_PRINT_FLOAT && FF_INTDEF == 2
6684 #include <math.h>
6685
6686 static int ilog10 (double n) /* Calculate log10(n) in integer output */
6687 {
6688 int rv = 0;
6689
6690 while (n >= 10) { /* Decimate digit in right shift */
6691 if (n >= 100000) {
6692 n /= 100000; rv += 5;
6693 } else {
6694 n /= 10; rv++;
6695 }
6696 }
6697 while (n < 1) { /* Decimate digit in left shift */
6698 if (n < 0.00001) {
6699 n *= 100000; rv -= 5;
6700 } else {
6701 n *= 10; rv--;
6702 }
6703 }
6704 return rv;
6705 }
6706
6707
6708 static double i10x (int n) /* Calculate 10^n in integer input */
6709 {
6710 double rv = 1;
6711
6712 while (n > 0) { /* Left shift */
6713 if (n >= 5) {
6714 rv *= 100000; n -= 5;
6715 } else {
6716 rv *= 10; n--;
6717 }
6718 }
6719 while (n < 0) { /* Right shift */
6720 if (n <= -5) {
6721 rv /= 100000; n += 5;
6722 } else {
6723 rv /= 10; n++;
6724 }
6725 }
6726 return rv;
6727 }
6728
6729
6730 static void ftoa (
6731 char* buf, /* Buffer to output the floating point string */
6732 double val, /* Value to output */
6733 int prec, /* Number of fractional digits */
6734 TCHAR fmt /* Notation */
6735 )
6736 {
6737 int d;
6738 int e = 0, m = 0;
6739 char sign = 0;
6740 double w;
6741 const char *er = 0;
6742 const char ds = FF_PRINT_FLOAT == 2 ? ',' : '.';
6743
6744
6745 if (isnan(val)) { /* Not a number? */
6746 er = "NaN";
6747 } else {
6748 if (prec < 0) prec = 6; /* Default precision? (6 fractional digits) */
6749 if (val < 0) { /* Nagative? */
6750 val = 0 - val; sign = '-';
6751 } else {
6752 sign = '+';
6753 }
6754 if (isinf(val)) { /* Infinite? */
6755 er = "INF";
6756 } else {
6757 if (fmt == 'f') { /* Decimal notation? */
6758 val += i10x(0 - prec) / 2; /* Round (nearest) */
6759 m = ilog10(val);
6760 if (m < 0) m = 0;
6761 if (m + prec + 3 >= SZ_NUM_BUF) er = "OV"; /* Buffer overflow? */
6762 } else { /* E notation */
6763 if (val != 0) { /* Not a true zero? */
6764 val += i10x(ilog10(val) - prec) / 2; /* Round (nearest) */
6765 e = ilog10(val);
6766 if (e > 99 || prec + 7 >= SZ_NUM_BUF) { /* Buffer overflow or E > +99? */
6767 er = "OV";
6768 } else {
6769 if (e < -99) e = -99;
6770 val /= i10x(e); /* Normalize */
6771 }
6772 }
6773 }
6774 }
6775 if (!er) { /* Not error condition */
6776 if (sign == '-') *buf++ = sign; /* Add a - if negative value */
6777 do { /* Put decimal number */
6778 if (m == -1) *buf++ = ds; /* Insert a decimal separator when get into fractional part */
6779 w = i10x(m); /* Snip the highest digit d */
6780 d = (int)(val / w); val -= d * w;
6781 *buf++ = (char)('0' + d); /* Put the digit */
6782 } while (--m >= -prec); /* Output all digits specified by prec */
6783 if (fmt != 'f') { /* Put exponent if needed */
6784 *buf++ = (char)fmt;
6785 if (e < 0) {
6786 e = 0 - e; *buf++ = '-';
6787 } else {
6788 *buf++ = '+';
6789 }
6790 *buf++ = (char)('0' + e / 10);
6791 *buf++ = (char)('0' + e % 10);
6792 }
6793 }
6794 }
6795 if (er) { /* Error condition */
6796 if (sign) *buf++ = sign; /* Add sign if needed */
6797 do *buf++ = *er++; while (*er); /* Put error symbol */
6798 }
6799 *buf = 0; /* Term */
6800 }
6801 #endif /* FF_PRINT_FLOAT && FF_INTDEF == 2 */
6802
6803
6804
6805 int f_printf (
6806 FIL* fp, /* Pointer to the file object */
6807 const TCHAR* fmt, /* Pointer to the format string */
6808 ... /* Optional arguments... */
6809 )
6810 {
6811 va_list arp;
6812 putbuff pb;
6813 UINT i, j, w, f, r;
6814 int prec;
6815 #if FF_PRINT_LLI && FF_INTDEF == 2
6816 QWORD v;
6817 #else
6818 DWORD v;
6819 #endif
6820 TCHAR tc, pad, *tp;
6821 TCHAR nul = 0;
6822 char d, str[SZ_NUM_BUF];
6823
6824
6825 putc_init(&pb, fp);
6826
6827 va_start(arp, fmt);
6828
6829 for (;;) {
6830 tc = *fmt++;
6831 if (tc == 0) break; /* End of format string */
6832 if (tc != '%') { /* Not an escape character (pass-through) */
6833 putc_bfd(&pb, tc);
6834 continue;
6835 }
6836 f = w = 0; pad = ' '; prec = -1; /* Initialize parms */
6837 tc = *fmt++;
6838 if (tc == '0') { /* Flag: '0' padded */
6839 pad = '0'; tc = *fmt++;
6840 } else if (tc == '-') { /* Flag: Left aligned */
6841 f = 2; tc = *fmt++;
6842 }
6843 if (tc == '*') { /* Minimum width from an argument */
6844 w = va_arg(arp, int);
6845 tc = *fmt++;
6846 } else {
6847 while (IsDigit(tc)) { /* Minimum width */
6848 w = w * 10 + tc - '0';
6849 tc = *fmt++;
6850 }
6851 }
6852 if (tc == '.') { /* Precision */
6853 tc = *fmt++;
6854 if (tc == '*') { /* Precision from an argument */
6855 prec = va_arg(arp, int);
6856 tc = *fmt++;
6857 } else {
6858 prec = 0;
6859 while (IsDigit(tc)) { /* Precision */
6860 prec = prec * 10 + tc - '0';
6861 tc = *fmt++;
6862 }
6863 }
6864 }
6865 if (tc == 'l') { /* Size: long int */
6866 f |= 4; tc = *fmt++;
6867 #if FF_PRINT_LLI && FF_INTDEF == 2
6868 if (tc == 'l') { /* Size: long long int */
6869 f |= 8; tc = *fmt++;
6870 }
6871 #endif
6872 }
6873 if (tc == 0) break; /* End of format string */
6874 switch (tc) { /* Atgument type is... */
6875 case 'b': /* Unsigned binary */
6876 r = 2; break;
6877 case 'o': /* Unsigned octal */
6878 r = 8; break;
6879 case 'd': /* Signed decimal */
6880 case 'u': /* Unsigned decimal */
6881 r = 10; break;
6882 case 'x': /* Unsigned hexdecimal (lower case) */
6883 case 'X': /* Unsigned hexdecimal (upper case) */
6884 r = 16; break;
6885 case 'c': /* Character */
6886 putc_bfd(&pb, (TCHAR)va_arg(arp, int));
6887 continue;
6888 case 's': /* String */
6889 tp = va_arg(arp, TCHAR*); /* Get a pointer argument */
6890 if (!tp) tp = &nul; /* Null ptr generates a null string */
6891 for (j = 0; tp[j]; j++) ; /* j = tcslen(tp) */
6892 if (prec >= 0 && j > (UINT)prec) j = prec; /* Limited length of string body */
6893 for ( ; !(f & 2) && j < w; j++) putc_bfd(&pb, pad); /* Left pads */
6894 while (*tp && prec--) putc_bfd(&pb, *tp++); /* Body */
6895 while (j++ < w) putc_bfd(&pb, ' '); /* Right pads */
6896 continue;
6897 #if FF_PRINT_FLOAT && FF_INTDEF == 2
6898 case 'f': /* Floating point (decimal) */
6899 case 'e': /* Floating point (e) */
6900 case 'E': /* Floating point (E) */
6901 ftoa(str, va_arg(arp, double), prec, tc); /* Make a flaoting point string */
6902 for (j = strlen(str); !(f & 2) && j < w; j++) putc_bfd(&pb, pad); /* Left pads */
6903 for (i = 0; str[i]; putc_bfd(&pb, str[i++])) ; /* Body */
6904 while (j++ < w) putc_bfd(&pb, ' '); /* Right pads */
6905 continue;
6906 #endif
6907 default: /* Unknown type (pass-through) */
6908 putc_bfd(&pb, tc); continue;
6909 }
6910
6911 /* Get an integer argument and put it in numeral */
6912 #if FF_PRINT_LLI && FF_INTDEF == 2
6913 if (f & 8) { /* long long argument? */
6914 v = (QWORD)va_arg(arp, LONGLONG);
6915 } else {
6916 if (f & 4) { /* long argument? */
6917 v = (tc == 'd') ? (QWORD)(LONGLONG)va_arg(arp, long) : (QWORD)va_arg(arp, unsigned long);
6918 } else { /* int/short/char argument */
6919 v = (tc == 'd') ? (QWORD)(LONGLONG)va_arg(arp, int) : (QWORD)va_arg(arp, unsigned int);
6920 }
6921 }
6922 if (tc == 'd' && (v & 0x8000000000000000)) { /* Negative value? */
6923 v = 0 - v; f |= 1;
6924 }
6925 #else
6926 if (f & 4) { /* long argument? */
6927 v = (DWORD)va_arg(arp, long);
6928 } else { /* int/short/char argument */
6929 v = (tc == 'd') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int);
6930 }
6931 if (tc == 'd' && (v & 0x80000000)) { /* Negative value? */
6932 v = 0 - v; f |= 1;
6933 }
6934 #endif
6935 i = 0;
6936 do { /* Make an integer number string */
6937 d = (char)(v % r); v /= r;
6938 if (d > 9) d += (tc == 'x') ? 0x27 : 0x07;
6939 str[i++] = d + '0';
6940 } while (v && i < SZ_NUM_BUF);
6941 if (f & 1) str[i++] = '-'; /* Sign */
6942 /* Write it */
6943 for (j = i; !(f & 2) && j < w; j++) putc_bfd(&pb, pad); /* Left pads */
6944 do putc_bfd(&pb, (TCHAR)str[--i]); while (i); /* Body */
6945 while (j++ < w) putc_bfd(&pb, ' '); /* Right pads */
6946 }
6947
6948 va_end(arp);
6949
6950 return putc_flush(&pb);
6951 }
6952
6953 #endif /* !FF_FS_READONLY */
6954 #endif /* FF_USE_STRFUNC */
6955
6956
6957
6958 #if FF_CODE_PAGE == 0
6959 /*-----------------------------------------------------------------------*/
6960 /* Set Active Codepage for the Path Name */
6961 /*-----------------------------------------------------------------------*/
6962
6963 FRESULT f_setcp (
6964 WORD cp /* Value to be set as active code page */
6965 )
6966 {
6967 static const WORD validcp[22] = { 437, 720, 737, 771, 775, 850, 852, 855, 857, 860, 861, 862, 863, 864, 865, 866, 869, 932, 936, 949, 950, 0};
6968 static const BYTE* const tables[22] = {Ct437, Ct720, Ct737, Ct771, Ct775, Ct850, Ct852, Ct855, Ct857, Ct860, Ct861, Ct862, Ct863, Ct864, Ct865, Ct866, Ct869, Dc932, Dc936, Dc949, Dc950, 0};
6969 UINT i;
6970
6971
6972 for (i = 0; validcp[i] != 0 && validcp[i] != cp; i++) ; /* Find the code page */
6973 if (validcp[i] != cp) return FR_INVALID_PARAMETER; /* Not found? */
6974
6975 CodePage = cp;
6976 if (cp >= 900) { /* DBCS */
6977 ExCvt = 0;
6978 DbcTbl = tables[i];
6979 } else { /* SBCS */
6980 ExCvt = tables[i];
6981 DbcTbl = 0;
6982 }
6983 return FR_OK;
6984 }
6985 #endif /* FF_CODE_PAGE == 0 */
6986
6987