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FATFileSystem/ChaN/ff.cpp@0:8b2a15992487, 2020-01-28 (annotated)

Committer:: adrevong
Date:: Tue Jan 28 11:14:21 2020 +0000
Revision:: 0:8b2a15992487

Who changed what in which revision?

User	Revision	Line number	New contents of line
adrevong	0:8b2a15992487	1	/*----------------------------------------------------------------------------/
adrevong	0:8b2a15992487	2	/ FatFs - FAT file system module R0.11a (C)ChaN, 2015 /
adrevong	0:8b2a15992487	3	/-----------------------------------------------------------------------------/
adrevong	0:8b2a15992487	4	/ FatFs module is a free software that opened under license policy of
adrevong	0:8b2a15992487	5	/ following conditions.
adrevong	0:8b2a15992487	6	/
adrevong	0:8b2a15992487	7	/ Copyright (C) 2015, ChaN, all right reserved.
adrevong	0:8b2a15992487	8	/
adrevong	0:8b2a15992487	9	/ 1. Redistributions of source code must retain the above copyright notice,
adrevong	0:8b2a15992487	10	/ this condition and the following disclaimer.
adrevong	0:8b2a15992487	11	/
adrevong	0:8b2a15992487	12	/ This software is provided by the copyright holder and contributors "AS IS"
adrevong	0:8b2a15992487	13	/ and any warranties related to this software are DISCLAIMED.
adrevong	0:8b2a15992487	14	/ The copyright owner or contributors be NOT LIABLE for any damages caused
adrevong	0:8b2a15992487	15	/ by use of this software.
adrevong	0:8b2a15992487	16	/----------------------------------------------------------------------------*/
adrevong	0:8b2a15992487	17
adrevong	0:8b2a15992487	18
adrevong	0:8b2a15992487	19	#include "ff.h" /* Declarations of FatFs API */
adrevong	0:8b2a15992487	20	#include "diskio.h" /* Declarations of disk I/O functions */
adrevong	0:8b2a15992487	21
adrevong	0:8b2a15992487	22
adrevong	0:8b2a15992487	23	/*--------------------------------------------------------------------------
adrevong	0:8b2a15992487	24
adrevong	0:8b2a15992487	25	Module Private Definitions
adrevong	0:8b2a15992487	26
adrevong	0:8b2a15992487	27	---------------------------------------------------------------------------*/
adrevong	0:8b2a15992487	28
adrevong	0:8b2a15992487	29	#if _FATFS != 64180 /* Revision ID */
adrevong	0:8b2a15992487	30	#error Wrong include file (ff.h).
adrevong	0:8b2a15992487	31	#endif
adrevong	0:8b2a15992487	32
adrevong	0:8b2a15992487	33
adrevong	0:8b2a15992487	34	/* Reentrancy related */
adrevong	0:8b2a15992487	35	#if _FS_REENTRANT
adrevong	0:8b2a15992487	36	#if _USE_LFN == 1
adrevong	0:8b2a15992487	37	#error Static LFN work area cannot be used at thread-safe configuration
adrevong	0:8b2a15992487	38	#endif
adrevong	0:8b2a15992487	39	#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
adrevong	0:8b2a15992487	40	#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
adrevong	0:8b2a15992487	41	#else
adrevong	0:8b2a15992487	42	#define ENTER_FF(fs)
adrevong	0:8b2a15992487	43	#define LEAVE_FF(fs, res) return res
adrevong	0:8b2a15992487	44	#endif
adrevong	0:8b2a15992487	45
adrevong	0:8b2a15992487	46	#define ABORT(fs, res) { fp->err = (BYTE)(res); LEAVE_FF(fs, res); }
adrevong	0:8b2a15992487	47
adrevong	0:8b2a15992487	48
adrevong	0:8b2a15992487	49	/* Definitions of sector size */
adrevong	0:8b2a15992487	50	#if (_MAX_SS < _MIN_SS) \|\| (_MAX_SS != 512 && _MAX_SS != 1024 && _MAX_SS != 2048 && _MAX_SS != 4096) \|\| (_MIN_SS != 512 && _MIN_SS != 1024 && _MIN_SS != 2048 && _MIN_SS != 4096)
adrevong	0:8b2a15992487	51	#error Wrong sector size configuration
adrevong	0:8b2a15992487	52	#endif
adrevong	0:8b2a15992487	53	#if _MAX_SS == _MIN_SS
adrevong	0:8b2a15992487	54	#define SS(fs) ((UINT)_MAX_SS) /* Fixed sector size */
adrevong	0:8b2a15992487	55	#else
adrevong	0:8b2a15992487	56	#define SS(fs) ((fs)->ssize) /* Variable sector size */
adrevong	0:8b2a15992487	57	#endif
adrevong	0:8b2a15992487	58
adrevong	0:8b2a15992487	59
adrevong	0:8b2a15992487	60	/* Timestamp feature */
adrevong	0:8b2a15992487	61	#if _FS_NORTC == 1
adrevong	0:8b2a15992487	62	#if _NORTC_YEAR < 1980 \|\| _NORTC_YEAR > 2107 \|\| _NORTC_MON < 1 \|\| _NORTC_MON > 12 \|\| _NORTC_MDAY < 1 \|\| _NORTC_MDAY > 31
adrevong	0:8b2a15992487	63	#error Invalid _FS_NORTC settings
adrevong	0:8b2a15992487	64	#endif
adrevong	0:8b2a15992487	65	#define GET_FATTIME() ((DWORD)(_NORTC_YEAR - 1980) << 25 \| (DWORD)_NORTC_MON << 21 \| (DWORD)_NORTC_MDAY << 16)
adrevong	0:8b2a15992487	66	#else
adrevong	0:8b2a15992487	67	#define GET_FATTIME() get_fattime()
adrevong	0:8b2a15992487	68	#endif
adrevong	0:8b2a15992487	69
adrevong	0:8b2a15992487	70
adrevong	0:8b2a15992487	71	/* File access control feature */
adrevong	0:8b2a15992487	72	#if _FS_LOCK
adrevong	0:8b2a15992487	73	#if _FS_READONLY
adrevong	0:8b2a15992487	74	#error _FS_LOCK must be 0 at read-only configuration
adrevong	0:8b2a15992487	75	#endif
adrevong	0:8b2a15992487	76	typedef struct {
adrevong	0:8b2a15992487	77	FATFS fs; / Object ID 1, volume (NULL:blank entry) */
adrevong	0:8b2a15992487	78	DWORD clu; /* Object ID 2, directory (0:root) */
adrevong	0:8b2a15992487	79	WORD idx; /* Object ID 3, directory index */
adrevong	0:8b2a15992487	80	WORD ctr; /* Object open counter, 0:none, 0x01..0xFF:read mode open count, 0x100:write mode */
adrevong	0:8b2a15992487	81	} FILESEM;
adrevong	0:8b2a15992487	82	#endif
adrevong	0:8b2a15992487	83
adrevong	0:8b2a15992487	84
adrevong	0:8b2a15992487	85
adrevong	0:8b2a15992487	86	/* DBCS code ranges and SBCS upper conversion tables */
adrevong	0:8b2a15992487	87
adrevong	0:8b2a15992487	88	#if _CODE_PAGE == 932 /* Japanese Shift-JIS */
adrevong	0:8b2a15992487	89	#define _DF1S 0x81 /* DBC 1st byte range 1 start */
adrevong	0:8b2a15992487	90	#define _DF1E 0x9F /* DBC 1st byte range 1 end */
adrevong	0:8b2a15992487	91	#define _DF2S 0xE0 /* DBC 1st byte range 2 start */
adrevong	0:8b2a15992487	92	#define _DF2E 0xFC /* DBC 1st byte range 2 end */
adrevong	0:8b2a15992487	93	#define _DS1S 0x40 /* DBC 2nd byte range 1 start */
adrevong	0:8b2a15992487	94	#define _DS1E 0x7E /* DBC 2nd byte range 1 end */
adrevong	0:8b2a15992487	95	#define _DS2S 0x80 /* DBC 2nd byte range 2 start */
adrevong	0:8b2a15992487	96	#define _DS2E 0xFC /* DBC 2nd byte range 2 end */
adrevong	0:8b2a15992487	97
adrevong	0:8b2a15992487	98	#elif _CODE_PAGE == 936 /* Simplified Chinese GBK */
adrevong	0:8b2a15992487	99	#define _DF1S 0x81
adrevong	0:8b2a15992487	100	#define _DF1E 0xFE
adrevong	0:8b2a15992487	101	#define _DS1S 0x40
adrevong	0:8b2a15992487	102	#define _DS1E 0x7E
adrevong	0:8b2a15992487	103	#define _DS2S 0x80
adrevong	0:8b2a15992487	104	#define _DS2E 0xFE
adrevong	0:8b2a15992487	105
adrevong	0:8b2a15992487	106	#elif _CODE_PAGE == 949 /* Korean */
adrevong	0:8b2a15992487	107	#define _DF1S 0x81
adrevong	0:8b2a15992487	108	#define _DF1E 0xFE
adrevong	0:8b2a15992487	109	#define _DS1S 0x41
adrevong	0:8b2a15992487	110	#define _DS1E 0x5A
adrevong	0:8b2a15992487	111	#define _DS2S 0x61
adrevong	0:8b2a15992487	112	#define _DS2E 0x7A
adrevong	0:8b2a15992487	113	#define _DS3S 0x81
adrevong	0:8b2a15992487	114	#define _DS3E 0xFE
adrevong	0:8b2a15992487	115
adrevong	0:8b2a15992487	116	#elif _CODE_PAGE == 950 /* Traditional Chinese Big5 */
adrevong	0:8b2a15992487	117	#define _DF1S 0x81
adrevong	0:8b2a15992487	118	#define _DF1E 0xFE
adrevong	0:8b2a15992487	119	#define _DS1S 0x40
adrevong	0:8b2a15992487	120	#define _DS1E 0x7E
adrevong	0:8b2a15992487	121	#define _DS2S 0xA1
adrevong	0:8b2a15992487	122	#define _DS2E 0xFE
adrevong	0:8b2a15992487	123
adrevong	0:8b2a15992487	124	#elif _CODE_PAGE == 437 /* U.S. */
adrevong	0:8b2a15992487	125	#define _DF1S 0
adrevong	0:8b2a15992487	126	#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
adrevong	0:8b2a15992487	127	0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	128	0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	129	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	130	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	131	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	132	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	133	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	134
adrevong	0:8b2a15992487	135	#elif _CODE_PAGE == 720 /* Arabic */
adrevong	0:8b2a15992487	136	#define _DF1S 0
adrevong	0:8b2a15992487	137	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	138	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	139	0xA0,0xA1,0xA2,0xA3,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	140	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	141	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	142	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	143	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	144	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	145
adrevong	0:8b2a15992487	146	#elif _CODE_PAGE == 737 /* Greek */
adrevong	0:8b2a15992487	147	#define _DF1S 0
adrevong	0:8b2a15992487	148	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	149	0x90,0x92,0x92,0x93,0x94,0x95,0x96,0x97,0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87, \
adrevong	0:8b2a15992487	150	0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F,0x90,0x91,0xAA,0x92,0x93,0x94,0x95,0x96, \
adrevong	0:8b2a15992487	151	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	152	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	153	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	154	0x97,0xEA,0xEB,0xEC,0xE4,0xED,0xEE,0xEF,0xF5,0xF0,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	155	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	156
adrevong	0:8b2a15992487	157	#elif _CODE_PAGE == 771 /* KBL */
adrevong	0:8b2a15992487	158	#define _DF1S 0
adrevong	0:8b2a15992487	159	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	160	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	161	0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	162	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	163	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	164	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDC,0xDE,0xDE, \
adrevong	0:8b2a15992487	165	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	166	0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFE,0xFF}
adrevong	0:8b2a15992487	167
adrevong	0:8b2a15992487	168	#elif _CODE_PAGE == 775 /* Baltic */
adrevong	0:8b2a15992487	169	#define _DF1S 0
adrevong	0:8b2a15992487	170	#define _EXCVT {0x80,0x9A,0x91,0xA0,0x8E,0x95,0x8F,0x80,0xAD,0xED,0x8A,0x8A,0xA1,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	171	0x90,0x92,0x92,0xE2,0x99,0x95,0x96,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	172	0xA0,0xA1,0xE0,0xA3,0xA3,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	173	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	174	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	175	0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xA5,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	176	0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE3,0xE8,0xE8,0xEA,0xEA,0xEE,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	177	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	178
adrevong	0:8b2a15992487	179	#elif _CODE_PAGE == 850 /* Latin 1 */
adrevong	0:8b2a15992487	180	#define _DF1S 0
adrevong	0:8b2a15992487	181	#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x41,0x43,0x45,0x45,0x45,0x49,0x49,0x49,0x41,0x41, \
adrevong	0:8b2a15992487	182	0x45,0x92,0x92,0x4F,0x4F,0x4F,0x55,0x55,0x59,0x4F,0x55,0x4F,0x9C,0x4F,0x9E,0x9F, \
adrevong	0:8b2a15992487	183	0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	184	0xB0,0xB1,0xB2,0xB3,0xB4,0x41,0x41,0x41,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	185	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0x41,0x41,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	186	0xD1,0xD1,0x45,0x45,0x45,0x49,0x49,0x49,0x49,0xD9,0xDA,0xDB,0xDC,0xDD,0x49,0xDF, \
adrevong	0:8b2a15992487	187	0x4F,0xE1,0x4F,0x4F,0x4F,0x4F,0xE6,0xE8,0xE8,0x55,0x55,0x55,0x59,0x59,0xEE,0xEF, \
adrevong	0:8b2a15992487	188	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	189
adrevong	0:8b2a15992487	190	#elif _CODE_PAGE == 852 /* Latin 2 */
adrevong	0:8b2a15992487	191	#define _DF1S 0
adrevong	0:8b2a15992487	192	#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xDE,0x8F,0x80,0x9D,0xD3,0x8A,0x8A,0xD7,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	193	0x90,0x91,0x91,0xE2,0x99,0x95,0x95,0x97,0x97,0x99,0x9A,0x9B,0x9B,0x9D,0x9E,0xAC, \
adrevong	0:8b2a15992487	194	0xB5,0xD6,0xE0,0xE9,0xA4,0xA4,0xA6,0xA6,0xA8,0xA8,0xAA,0x8D,0xAC,0xB8,0xAE,0xAF, \
adrevong	0:8b2a15992487	195	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBD,0xBF, \
adrevong	0:8b2a15992487	196	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC6,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	197	0xD1,0xD1,0xD2,0xD3,0xD2,0xD5,0xD6,0xD7,0xB7,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	198	0xE0,0xE1,0xE2,0xE3,0xE3,0xD5,0xE6,0xE6,0xE8,0xE9,0xE8,0xEB,0xED,0xED,0xDD,0xEF, \
adrevong	0:8b2a15992487	199	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xEB,0xFC,0xFC,0xFE,0xFF}
adrevong	0:8b2a15992487	200
adrevong	0:8b2a15992487	201	#elif _CODE_PAGE == 855 /* Cyrillic */
adrevong	0:8b2a15992487	202	#define _DF1S 0
adrevong	0:8b2a15992487	203	#define _EXCVT {0x81,0x81,0x83,0x83,0x85,0x85,0x87,0x87,0x89,0x89,0x8B,0x8B,0x8D,0x8D,0x8F,0x8F, \
adrevong	0:8b2a15992487	204	0x91,0x91,0x93,0x93,0x95,0x95,0x97,0x97,0x99,0x99,0x9B,0x9B,0x9D,0x9D,0x9F,0x9F, \
adrevong	0:8b2a15992487	205	0xA1,0xA1,0xA3,0xA3,0xA5,0xA5,0xA7,0xA7,0xA9,0xA9,0xAB,0xAB,0xAD,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	206	0xB0,0xB1,0xB2,0xB3,0xB4,0xB6,0xB6,0xB8,0xB8,0xB9,0xBA,0xBB,0xBC,0xBE,0xBE,0xBF, \
adrevong	0:8b2a15992487	207	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	208	0xD1,0xD1,0xD3,0xD3,0xD5,0xD5,0xD7,0xD7,0xDD,0xD9,0xDA,0xDB,0xDC,0xDD,0xE0,0xDF, \
adrevong	0:8b2a15992487	209	0xE0,0xE2,0xE2,0xE4,0xE4,0xE6,0xE6,0xE8,0xE8,0xEA,0xEA,0xEC,0xEC,0xEE,0xEE,0xEF, \
adrevong	0:8b2a15992487	210	0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF8,0xFA,0xFA,0xFC,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	211
adrevong	0:8b2a15992487	212	#elif _CODE_PAGE == 857 /* Turkish */
adrevong	0:8b2a15992487	213	#define _DF1S 0
adrevong	0:8b2a15992487	214	#define _EXCVT {0x80,0x9A,0x90,0xB6,0x8E,0xB7,0x8F,0x80,0xD2,0xD3,0xD4,0xD8,0xD7,0x49,0x8E,0x8F, \
adrevong	0:8b2a15992487	215	0x90,0x92,0x92,0xE2,0x99,0xE3,0xEA,0xEB,0x98,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9E, \
adrevong	0:8b2a15992487	216	0xB5,0xD6,0xE0,0xE9,0xA5,0xA5,0xA6,0xA6,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	217	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	218	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC7,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	219	0xD0,0xD1,0xD2,0xD3,0xD4,0x49,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	220	0xE0,0xE1,0xE2,0xE3,0xE5,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xDE,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	221	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	222
adrevong	0:8b2a15992487	223	#elif _CODE_PAGE == 860 /* Portuguese */
adrevong	0:8b2a15992487	224	#define _DF1S 0
adrevong	0:8b2a15992487	225	#define _EXCVT {0x80,0x9A,0x90,0x8F,0x8E,0x91,0x86,0x80,0x89,0x89,0x92,0x8B,0x8C,0x98,0x8E,0x8F, \
adrevong	0:8b2a15992487	226	0x90,0x91,0x92,0x8C,0x99,0xA9,0x96,0x9D,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	227	0x86,0x8B,0x9F,0x96,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	228	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	229	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	230	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	231	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	232	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	233
adrevong	0:8b2a15992487	234	#elif _CODE_PAGE == 861 /* Icelandic */
adrevong	0:8b2a15992487	235	#define _DF1S 0
adrevong	0:8b2a15992487	236	#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x8B,0x8B,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	237	0x90,0x92,0x92,0x4F,0x99,0x8D,0x55,0x97,0x97,0x99,0x9A,0x9D,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	238	0xA4,0xA5,0xA6,0xA7,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	239	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	240	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	241	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	242	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	243	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	244
adrevong	0:8b2a15992487	245	#elif _CODE_PAGE == 862 /* Hebrew */
adrevong	0:8b2a15992487	246	#define _DF1S 0
adrevong	0:8b2a15992487	247	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	248	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	249	0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	250	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	251	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	252	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	253	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	254	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	255
adrevong	0:8b2a15992487	256	#elif _CODE_PAGE == 863 /* Canadian-French */
adrevong	0:8b2a15992487	257	#define _DF1S 0
adrevong	0:8b2a15992487	258	#define _EXCVT {0x43,0x55,0x45,0x41,0x41,0x41,0x86,0x43,0x45,0x45,0x45,0x49,0x49,0x8D,0x41,0x8F, \
adrevong	0:8b2a15992487	259	0x45,0x45,0x45,0x4F,0x45,0x49,0x55,0x55,0x98,0x4F,0x55,0x9B,0x9C,0x55,0x55,0x9F, \
adrevong	0:8b2a15992487	260	0xA0,0xA1,0x4F,0x55,0xA4,0xA5,0xA6,0xA7,0x49,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	261	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	262	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	263	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	264	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	265	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	266
adrevong	0:8b2a15992487	267	#elif _CODE_PAGE == 864 /* Arabic */
adrevong	0:8b2a15992487	268	#define _DF1S 0
adrevong	0:8b2a15992487	269	#define _EXCVT {0x80,0x9A,0x45,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
adrevong	0:8b2a15992487	270	0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	271	0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	272	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	273	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	274	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	275	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	276	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	277
adrevong	0:8b2a15992487	278	#elif _CODE_PAGE == 865 /* Nordic */
adrevong	0:8b2a15992487	279	#define _DF1S 0
adrevong	0:8b2a15992487	280	#define _EXCVT {0x80,0x9A,0x90,0x41,0x8E,0x41,0x8F,0x80,0x45,0x45,0x45,0x49,0x49,0x49,0x8E,0x8F, \
adrevong	0:8b2a15992487	281	0x90,0x92,0x92,0x4F,0x99,0x4F,0x55,0x55,0x59,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	282	0x41,0x49,0x4F,0x55,0xA5,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	283	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	284	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	285	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	286	0xE0,0xE1,0xE2,0xE3,0xE4,0xE5,0xE6,0xE7,0xE8,0xE9,0xEA,0xEB,0xEC,0xED,0xEE,0xEF, \
adrevong	0:8b2a15992487	287	0xF0,0xF1,0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	288
adrevong	0:8b2a15992487	289	#elif _CODE_PAGE == 866 /* Russian */
adrevong	0:8b2a15992487	290	#define _DF1S 0
adrevong	0:8b2a15992487	291	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	292	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	293	0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	294	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	295	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	296	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xD6,0xD7,0xD8,0xD9,0xDA,0xDB,0xDC,0xDD,0xDE,0xDF, \
adrevong	0:8b2a15992487	297	0x90,0x91,0x92,0x93,0x9d,0x95,0x96,0x97,0x98,0x99,0x9A,0x9B,0x9C,0x9D,0x9E,0x9F, \
adrevong	0:8b2a15992487	298	0xF0,0xF0,0xF2,0xF2,0xF4,0xF4,0xF6,0xF6,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF}
adrevong	0:8b2a15992487	299
adrevong	0:8b2a15992487	300	#elif _CODE_PAGE == 869 /* Greek 2 */
adrevong	0:8b2a15992487	301	#define _DF1S 0
adrevong	0:8b2a15992487	302	#define _EXCVT {0x80,0x81,0x82,0x83,0x84,0x85,0x86,0x87,0x88,0x89,0x8A,0x8B,0x8C,0x8D,0x8E,0x8F, \
adrevong	0:8b2a15992487	303	0x90,0x91,0x92,0x93,0x94,0x95,0x96,0x97,0x98,0x99,0x9A,0x86,0x9C,0x8D,0x8F,0x90, \
adrevong	0:8b2a15992487	304	0x91,0x90,0x92,0x95,0xA4,0xA5,0xA6,0xA7,0xA8,0xA9,0xAA,0xAB,0xAC,0xAD,0xAE,0xAF, \
adrevong	0:8b2a15992487	305	0xB0,0xB1,0xB2,0xB3,0xB4,0xB5,0xB6,0xB7,0xB8,0xB9,0xBA,0xBB,0xBC,0xBD,0xBE,0xBF, \
adrevong	0:8b2a15992487	306	0xC0,0xC1,0xC2,0xC3,0xC4,0xC5,0xC6,0xC7,0xC8,0xC9,0xCA,0xCB,0xCC,0xCD,0xCE,0xCF, \
adrevong	0:8b2a15992487	307	0xD0,0xD1,0xD2,0xD3,0xD4,0xD5,0xA4,0xA5,0xA6,0xD9,0xDA,0xDB,0xDC,0xA7,0xA8,0xDF, \
adrevong	0:8b2a15992487	308	0xA9,0xAA,0xAC,0xAD,0xB5,0xB6,0xB7,0xB8,0xBD,0xBE,0xC6,0xC7,0xCF,0xCF,0xD0,0xEF, \
adrevong	0:8b2a15992487	309	0xF0,0xF1,0xD1,0xD2,0xD3,0xF5,0xD4,0xF7,0xF8,0xF9,0xD5,0x96,0x95,0x98,0xFE,0xFF}
adrevong	0:8b2a15992487	310
adrevong	0:8b2a15992487	311	#elif _CODE_PAGE == 1 /* ASCII (for only non-LFN cfg) */
adrevong	0:8b2a15992487	312	#if _USE_LFN
adrevong	0:8b2a15992487	313	#error Cannot use LFN feature without valid code page.
adrevong	0:8b2a15992487	314	#endif
adrevong	0:8b2a15992487	315	#define _DF1S 0
adrevong	0:8b2a15992487	316
adrevong	0:8b2a15992487	317	#else
adrevong	0:8b2a15992487	318	#error Unknown code page
adrevong	0:8b2a15992487	319
adrevong	0:8b2a15992487	320	#endif
adrevong	0:8b2a15992487	321
adrevong	0:8b2a15992487	322
adrevong	0:8b2a15992487	323	/* Character code support macros */
adrevong	0:8b2a15992487	324	#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
adrevong	0:8b2a15992487	325	#define IsLower(c) (((c)>='a')&&((c)<='z'))
adrevong	0:8b2a15992487	326	#define IsDigit(c) (((c)>='0')&&((c)<='9'))
adrevong	0:8b2a15992487	327
adrevong	0:8b2a15992487	328	#if _DF1S /* Code page is DBCS */
adrevong	0:8b2a15992487	329
adrevong	0:8b2a15992487	330	#ifdef _DF2S /* Two 1st byte areas */
adrevong	0:8b2a15992487	331	#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) \|\| ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
adrevong	0:8b2a15992487	332	#else /* One 1st byte area */
adrevong	0:8b2a15992487	333	#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
adrevong	0:8b2a15992487	334	#endif
adrevong	0:8b2a15992487	335
adrevong	0:8b2a15992487	336	#ifdef _DS3S /* Three 2nd byte areas */
adrevong	0:8b2a15992487	337	#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) \|\| ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) \|\| ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
adrevong	0:8b2a15992487	338	#else /* Two 2nd byte areas */
adrevong	0:8b2a15992487	339	#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) \|\| ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
adrevong	0:8b2a15992487	340	#endif
adrevong	0:8b2a15992487	341
adrevong	0:8b2a15992487	342	#else /* Code page is SBCS */
adrevong	0:8b2a15992487	343
adrevong	0:8b2a15992487	344	#define IsDBCS1(c) 0
adrevong	0:8b2a15992487	345	#define IsDBCS2(c) 0
adrevong	0:8b2a15992487	346
adrevong	0:8b2a15992487	347	#endif /* _DF1S */
adrevong	0:8b2a15992487	348
adrevong	0:8b2a15992487	349
adrevong	0:8b2a15992487	350	/* Name status flags */
adrevong	0:8b2a15992487	351	#define NSFLAG 11 /* Index of name status byte in fn[] */
adrevong	0:8b2a15992487	352	#define NS_LOSS 0x01 /* Out of 8.3 format */
adrevong	0:8b2a15992487	353	#define NS_LFN 0x02 /* Force to create LFN entry */
adrevong	0:8b2a15992487	354	#define NS_LAST 0x04 /* Last segment */
adrevong	0:8b2a15992487	355	#define NS_BODY 0x08 /* Lower case flag (body) */
adrevong	0:8b2a15992487	356	#define NS_EXT 0x10 /* Lower case flag (ext) */
adrevong	0:8b2a15992487	357	#define NS_DOT 0x20 /* Dot entry */
adrevong	0:8b2a15992487	358
adrevong	0:8b2a15992487	359
adrevong	0:8b2a15992487	360	/* FAT sub-type boundaries (Differ from specs but correct for real DOS/Windows) */
adrevong	0:8b2a15992487	361	#define MIN_FAT16 4086U /* Minimum number of clusters of FAT16 */
adrevong	0:8b2a15992487	362	#define MIN_FAT32 65526U /* Minimum number of clusters of FAT32 */
adrevong	0:8b2a15992487	363
adrevong	0:8b2a15992487	364
adrevong	0:8b2a15992487	365	/* FatFs refers the members in the FAT structures as byte array instead of
adrevong	0:8b2a15992487	366	/ structure members because the structure is not binary compatible between
adrevong	0:8b2a15992487	367	/ different platforms */
adrevong	0:8b2a15992487	368
adrevong	0:8b2a15992487	369	#define BS_jmpBoot 0 /* x86 jump instruction (3) */
adrevong	0:8b2a15992487	370	#define BS_OEMName 3 /* OEM name (8) */
adrevong	0:8b2a15992487	371	#define BPB_BytsPerSec 11 /* Sector size [byte] (2) */
adrevong	0:8b2a15992487	372	#define BPB_SecPerClus 13 /* Cluster size [sector] (1) */
adrevong	0:8b2a15992487	373	#define BPB_RsvdSecCnt 14 /* Size of reserved area [sector] (2) */
adrevong	0:8b2a15992487	374	#define BPB_NumFATs 16 /* Number of FAT copies (1) */
adrevong	0:8b2a15992487	375	#define BPB_RootEntCnt 17 /* Number of root directory entries for FAT12/16 (2) */
adrevong	0:8b2a15992487	376	#define BPB_TotSec16 19 /* Volume size [sector] (2) */
adrevong	0:8b2a15992487	377	#define BPB_Media 21 /* Media descriptor (1) */
adrevong	0:8b2a15992487	378	#define BPB_FATSz16 22 /* FAT size [sector] (2) */
adrevong	0:8b2a15992487	379	#define BPB_SecPerTrk 24 /* Track size [sector] (2) */
adrevong	0:8b2a15992487	380	#define BPB_NumHeads 26 /* Number of heads (2) */
adrevong	0:8b2a15992487	381	#define BPB_HiddSec 28 /* Number of special hidden sectors (4) */
adrevong	0:8b2a15992487	382	#define BPB_TotSec32 32 /* Volume size [sector] (4) */
adrevong	0:8b2a15992487	383	#define BS_DrvNum 36 /* Physical drive number (1) */
adrevong	0:8b2a15992487	384	#define BS_NTres 37 /* Error flag (1) */
adrevong	0:8b2a15992487	385	#define BS_BootSig 38 /* Extended boot signature (1) */
adrevong	0:8b2a15992487	386	#define BS_VolID 39 /* Volume serial number (4) */
adrevong	0:8b2a15992487	387	#define BS_VolLab 43 /* Volume label (8) */
adrevong	0:8b2a15992487	388	#define BS_FilSysType 54 /* File system type (1) */
adrevong	0:8b2a15992487	389	#define BPB_FATSz32 36 /* FAT size [sector] (4) */
adrevong	0:8b2a15992487	390	#define BPB_ExtFlags 40 /* Extended flags (2) */
adrevong	0:8b2a15992487	391	#define BPB_FSVer 42 /* File system version (2) */
adrevong	0:8b2a15992487	392	#define BPB_RootClus 44 /* Root directory first cluster (4) */
adrevong	0:8b2a15992487	393	#define BPB_FSInfo 48 /* Offset of FSINFO sector (2) */
adrevong	0:8b2a15992487	394	#define BPB_BkBootSec 50 /* Offset of backup boot sector (2) */
adrevong	0:8b2a15992487	395	#define BS_DrvNum32 64 /* Physical drive number (1) */
adrevong	0:8b2a15992487	396	#define BS_NTres32 65 /* Error flag (1) */
adrevong	0:8b2a15992487	397	#define BS_BootSig32 66 /* Extended boot signature (1) */
adrevong	0:8b2a15992487	398	#define BS_VolID32 67 /* Volume serial number (4) */
adrevong	0:8b2a15992487	399	#define BS_VolLab32 71 /* Volume label (8) */
adrevong	0:8b2a15992487	400	#define BS_FilSysType32 82 /* File system type (1) */
adrevong	0:8b2a15992487	401	#define FSI_LeadSig 0 /* FSI: Leading signature (4) */
adrevong	0:8b2a15992487	402	#define FSI_StrucSig 484 /* FSI: Structure signature (4) */
adrevong	0:8b2a15992487	403	#define FSI_Free_Count 488 /* FSI: Number of free clusters (4) */
adrevong	0:8b2a15992487	404	#define FSI_Nxt_Free 492 /* FSI: Last allocated cluster (4) */
adrevong	0:8b2a15992487	405	#define MBR_Table 446 /* MBR: Partition table offset (2) */
adrevong	0:8b2a15992487	406	#define SZ_PTE 16 /* MBR: Size of a partition table entry */
adrevong	0:8b2a15992487	407	#define BS_55AA 510 /* Signature word (2) */
adrevong	0:8b2a15992487	408
adrevong	0:8b2a15992487	409	#define DIR_Name 0 /* Short file name (11) */
adrevong	0:8b2a15992487	410	#define DIR_Attr 11 /* Attribute (1) */
adrevong	0:8b2a15992487	411	#define DIR_NTres 12 /* Lower case flag (1) */
adrevong	0:8b2a15992487	412	#define DIR_CrtTimeTenth 13 /* Created time sub-second (1) */
adrevong	0:8b2a15992487	413	#define DIR_CrtTime 14 /* Created time (2) */
adrevong	0:8b2a15992487	414	#define DIR_CrtDate 16 /* Created date (2) */
adrevong	0:8b2a15992487	415	#define DIR_LstAccDate 18 /* Last accessed date (2) */
adrevong	0:8b2a15992487	416	#define DIR_FstClusHI 20 /* Higher 16-bit of first cluster (2) */
adrevong	0:8b2a15992487	417	#define DIR_WrtTime 22 /* Modified time (2) */
adrevong	0:8b2a15992487	418	#define DIR_WrtDate 24 /* Modified date (2) */
adrevong	0:8b2a15992487	419	#define DIR_FstClusLO 26 /* Lower 16-bit of first cluster (2) */
adrevong	0:8b2a15992487	420	#define DIR_FileSize 28 /* File size (4) */
adrevong	0:8b2a15992487	421	#define LDIR_Ord 0 /* LFN entry order and LLE flag (1) */
adrevong	0:8b2a15992487	422	#define LDIR_Attr 11 /* LFN attribute (1) */
adrevong	0:8b2a15992487	423	#define LDIR_Type 12 /* LFN type (1) */
adrevong	0:8b2a15992487	424	#define LDIR_Chksum 13 /* Checksum of corresponding SFN entry */
adrevong	0:8b2a15992487	425	#define LDIR_FstClusLO 26 /* Must be zero (0) */
adrevong	0:8b2a15992487	426	#define SZ_DIRE 32 /* Size of a directory entry */
adrevong	0:8b2a15992487	427	#define LLEF 0x40 /* Last long entry flag in LDIR_Ord */
adrevong	0:8b2a15992487	428	#define DDEM 0xE5 /* Deleted directory entry mark at DIR_Name[0] */
adrevong	0:8b2a15992487	429	#define RDDEM 0x05 /* Replacement of the character collides with DDEM */
adrevong	0:8b2a15992487	430
adrevong	0:8b2a15992487	431
adrevong	0:8b2a15992487	432
adrevong	0:8b2a15992487	433
adrevong	0:8b2a15992487	434	/*--------------------------------------------------------------------------
adrevong	0:8b2a15992487	435
adrevong	0:8b2a15992487	436	Module Private Work Area
adrevong	0:8b2a15992487	437
adrevong	0:8b2a15992487	438	---------------------------------------------------------------------------*/
adrevong	0:8b2a15992487	439
adrevong	0:8b2a15992487	440	/* Remark: Uninitialized variables with static duration are guaranteed
adrevong	0:8b2a15992487	441	/ zero/null at start-up. If not, either the linker or start-up routine
adrevong	0:8b2a15992487	442	/ being used is not compliance with ANSI-C standard.
adrevong	0:8b2a15992487	443	*/
adrevong	0:8b2a15992487	444
adrevong	0:8b2a15992487	445	#if _VOLUMES < 1 \|\| _VOLUMES > 9
adrevong	0:8b2a15992487	446	#error Wrong _VOLUMES setting
adrevong	0:8b2a15992487	447	#endif
adrevong	0:8b2a15992487	448	static FATFS FatFs[_VOLUMES]; / Pointer to the file system objects (logical drives) */
adrevong	0:8b2a15992487	449	static WORD Fsid; /* File system mount ID */
adrevong	0:8b2a15992487	450
adrevong	0:8b2a15992487	451	#if _FS_RPATH && _VOLUMES >= 2
adrevong	0:8b2a15992487	452	static BYTE CurrVol; /* Current drive */
adrevong	0:8b2a15992487	453	#endif
adrevong	0:8b2a15992487	454
adrevong	0:8b2a15992487	455	#if _FS_LOCK
adrevong	0:8b2a15992487	456	static FILESEM Files[_FS_LOCK]; /* Open object lock semaphores */
adrevong	0:8b2a15992487	457	#endif
adrevong	0:8b2a15992487	458
adrevong	0:8b2a15992487	459	#if _USE_LFN == 0 /* Non LFN feature */
adrevong	0:8b2a15992487	460	#define DEFINE_NAMEBUF BYTE sfn[12]
adrevong	0:8b2a15992487	461	#define INIT_BUF(dobj) (dobj).fn = sfn
adrevong	0:8b2a15992487	462	#define FREE_BUF()
adrevong	0:8b2a15992487	463	#else
adrevong	0:8b2a15992487	464	#if _MAX_LFN < 12 \|\| _MAX_LFN > 255
adrevong	0:8b2a15992487	465	#error Wrong _MAX_LFN setting
adrevong	0:8b2a15992487	466	#endif
adrevong	0:8b2a15992487	467	#if _USE_LFN == 1 /* LFN feature with static working buffer */
adrevong	0:8b2a15992487	468	static WCHAR LfnBuf[_MAX_LFN + 1];
adrevong	0:8b2a15992487	469	#define DEFINE_NAMEBUF BYTE sfn[12]
adrevong	0:8b2a15992487	470	#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
adrevong	0:8b2a15992487	471	#define FREE_BUF()
adrevong	0:8b2a15992487	472	#elif _USE_LFN == 2 /* LFN feature with dynamic working buffer on the stack */
adrevong	0:8b2a15992487	473	#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
adrevong	0:8b2a15992487	474	#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
adrevong	0:8b2a15992487	475	#define FREE_BUF()
adrevong	0:8b2a15992487	476	#elif _USE_LFN == 3 /* LFN feature with dynamic working buffer on the heap */
adrevong	0:8b2a15992487	477	#define DEFINE_NAMEBUF BYTE sfn[12]; WCHAR *lfn
adrevong	0:8b2a15992487	478	#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); (dobj).lfn = lfn; (dobj).fn = sfn; }
adrevong	0:8b2a15992487	479	#define FREE_BUF() ff_memfree(lfn)
adrevong	0:8b2a15992487	480	#else
adrevong	0:8b2a15992487	481	#error Wrong _USE_LFN setting
adrevong	0:8b2a15992487	482	#endif
adrevong	0:8b2a15992487	483	#endif
adrevong	0:8b2a15992487	484
adrevong	0:8b2a15992487	485	#ifdef _EXCVT
adrevong	0:8b2a15992487	486	static const BYTE ExCvt[] = _EXCVT; /* Upper conversion table for SBCS extended characters */
adrevong	0:8b2a15992487	487	#endif
adrevong	0:8b2a15992487	488
adrevong	0:8b2a15992487	489
adrevong	0:8b2a15992487	490
adrevong	0:8b2a15992487	491
adrevong	0:8b2a15992487	492
adrevong	0:8b2a15992487	493
adrevong	0:8b2a15992487	494	/*--------------------------------------------------------------------------
adrevong	0:8b2a15992487	495
adrevong	0:8b2a15992487	496	Module Private Functions
adrevong	0:8b2a15992487	497
adrevong	0:8b2a15992487	498	---------------------------------------------------------------------------*/
adrevong	0:8b2a15992487	499
adrevong	0:8b2a15992487	500
adrevong	0:8b2a15992487	501	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	502	/* String functions */
adrevong	0:8b2a15992487	503	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	504
adrevong	0:8b2a15992487	505	/* Copy memory to memory */
adrevong	0:8b2a15992487	506	static
adrevong	0:8b2a15992487	507	void mem_cpy (void* dst, const void* src, UINT cnt) {
adrevong	0:8b2a15992487	508	BYTE d = (BYTE)dst;
adrevong	0:8b2a15992487	509	const BYTE s = (const BYTE)src;
adrevong	0:8b2a15992487	510
adrevong	0:8b2a15992487	511	#if _WORD_ACCESS == 1
adrevong	0:8b2a15992487	512	while (cnt >= sizeof (int)) {
adrevong	0:8b2a15992487	513	(int)d = (int)s;
adrevong	0:8b2a15992487	514	d += sizeof (int); s += sizeof (int);
adrevong	0:8b2a15992487	515	cnt -= sizeof (int);
adrevong	0:8b2a15992487	516	}
adrevong	0:8b2a15992487	517	#endif
adrevong	0:8b2a15992487	518	while (cnt--)
adrevong	0:8b2a15992487	519	d++ = s++;
adrevong	0:8b2a15992487	520	}
adrevong	0:8b2a15992487	521
adrevong	0:8b2a15992487	522	/* Fill memory */
adrevong	0:8b2a15992487	523	static
adrevong	0:8b2a15992487	524	void mem_set (void* dst, int val, UINT cnt) {
adrevong	0:8b2a15992487	525	BYTE d = (BYTE)dst;
adrevong	0:8b2a15992487	526
adrevong	0:8b2a15992487	527	while (cnt--)
adrevong	0:8b2a15992487	528	*d++ = (BYTE)val;
adrevong	0:8b2a15992487	529	}
adrevong	0:8b2a15992487	530
adrevong	0:8b2a15992487	531	/* Compare memory to memory */
adrevong	0:8b2a15992487	532	static
adrevong	0:8b2a15992487	533	int mem_cmp (const void* dst, const void* src, UINT cnt) {
adrevong	0:8b2a15992487	534	const BYTE d = (const BYTE )dst, s = (const BYTE )src;
adrevong	0:8b2a15992487	535	int r = 0;
adrevong	0:8b2a15992487	536
adrevong	0:8b2a15992487	537	while (cnt-- && (r = d++ - s++) == 0) ;
adrevong	0:8b2a15992487	538	return r;
adrevong	0:8b2a15992487	539	}
adrevong	0:8b2a15992487	540
adrevong	0:8b2a15992487	541	/* Check if chr is contained in the string */
adrevong	0:8b2a15992487	542	static
adrevong	0:8b2a15992487	543	int chk_chr (const char* str, int chr) {
adrevong	0:8b2a15992487	544	while (str && str != chr) str++;
adrevong	0:8b2a15992487	545	return *str;
adrevong	0:8b2a15992487	546	}
adrevong	0:8b2a15992487	547
adrevong	0:8b2a15992487	548
adrevong	0:8b2a15992487	549
adrevong	0:8b2a15992487	550
adrevong	0:8b2a15992487	551	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	552	/* Request/Release grant to access the volume */
adrevong	0:8b2a15992487	553	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	554	#if _FS_REENTRANT
adrevong	0:8b2a15992487	555	static
adrevong	0:8b2a15992487	556	int lock_fs (
adrevong	0:8b2a15992487	557	FATFS* fs /* File system object */
adrevong	0:8b2a15992487	558	)
adrevong	0:8b2a15992487	559	{
adrevong	0:8b2a15992487	560	return ff_req_grant(fs->sobj);
adrevong	0:8b2a15992487	561	}
adrevong	0:8b2a15992487	562
adrevong	0:8b2a15992487	563
adrevong	0:8b2a15992487	564	static
adrevong	0:8b2a15992487	565	void unlock_fs (
adrevong	0:8b2a15992487	566	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	567	FRESULT res /* Result code to be returned */
adrevong	0:8b2a15992487	568	)
adrevong	0:8b2a15992487	569	{
adrevong	0:8b2a15992487	570	if (fs &&
adrevong	0:8b2a15992487	571	res != FR_NOT_ENABLED &&
adrevong	0:8b2a15992487	572	res != FR_INVALID_DRIVE &&
adrevong	0:8b2a15992487	573	res != FR_INVALID_OBJECT &&
adrevong	0:8b2a15992487	574	res != FR_TIMEOUT) {
adrevong	0:8b2a15992487	575	ff_rel_grant(fs->sobj);
adrevong	0:8b2a15992487	576	}
adrevong	0:8b2a15992487	577	}
adrevong	0:8b2a15992487	578	#endif
adrevong	0:8b2a15992487	579
adrevong	0:8b2a15992487	580
adrevong	0:8b2a15992487	581
adrevong	0:8b2a15992487	582
adrevong	0:8b2a15992487	583	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	584	/* File lock control functions */
adrevong	0:8b2a15992487	585	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	586	#if _FS_LOCK
adrevong	0:8b2a15992487	587
adrevong	0:8b2a15992487	588	static
adrevong	0:8b2a15992487	589	FRESULT chk_lock ( /* Check if the file can be accessed */
adrevong	0:8b2a15992487	590	FATFS_DIR* dp, /* Directory object pointing the file to be checked */
adrevong	0:8b2a15992487	591	int acc /* Desired access type (0:Read, 1:Write, 2:Delete/Rename) */
adrevong	0:8b2a15992487	592	)
adrevong	0:8b2a15992487	593	{
adrevong	0:8b2a15992487	594	UINT i, be;
adrevong	0:8b2a15992487	595
adrevong	0:8b2a15992487	596	/* Search file semaphore table */
adrevong	0:8b2a15992487	597	for (i = be = 0; i < _FS_LOCK; i++) {
adrevong	0:8b2a15992487	598	if (Files[i].fs) { /* Existing entry */
adrevong	0:8b2a15992487	599	if (Files[i].fs == dp->fs && /* Check if the object matched with an open object */
adrevong	0:8b2a15992487	600	Files[i].clu == dp->sclust &&
adrevong	0:8b2a15992487	601	Files[i].idx == dp->index) break;
adrevong	0:8b2a15992487	602	} else { /* Blank entry */
adrevong	0:8b2a15992487	603	be = 1;
adrevong	0:8b2a15992487	604	}
adrevong	0:8b2a15992487	605	}
adrevong	0:8b2a15992487	606	if (i == _FS_LOCK) /* The object is not opened */
adrevong	0:8b2a15992487	607	return (be \|\| acc == 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new object? */
adrevong	0:8b2a15992487	608
adrevong	0:8b2a15992487	609	/* The object has been opened. Reject any open against writing file and all write mode open */
adrevong	0:8b2a15992487	610	return (acc \|\| Files[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
adrevong	0:8b2a15992487	611	}
adrevong	0:8b2a15992487	612
adrevong	0:8b2a15992487	613
adrevong	0:8b2a15992487	614	static
adrevong	0:8b2a15992487	615	int enq_lock (void) /* Check if an entry is available for a new object */
adrevong	0:8b2a15992487	616	{
adrevong	0:8b2a15992487	617	UINT i;
adrevong	0:8b2a15992487	618
adrevong	0:8b2a15992487	619	for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
adrevong	0:8b2a15992487	620	return (i == _FS_LOCK) ? 0 : 1;
adrevong	0:8b2a15992487	621	}
adrevong	0:8b2a15992487	622
adrevong	0:8b2a15992487	623
adrevong	0:8b2a15992487	624	static
adrevong	0:8b2a15992487	625	UINT inc_lock ( /* Increment object open counter and returns its index (0:Internal error) */
adrevong	0:8b2a15992487	626	FATFS_DIR* dp, /* Directory object pointing the file to register or increment */
adrevong	0:8b2a15992487	627	int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
adrevong	0:8b2a15992487	628	)
adrevong	0:8b2a15992487	629	{
adrevong	0:8b2a15992487	630	UINT i;
adrevong	0:8b2a15992487	631
adrevong	0:8b2a15992487	632
adrevong	0:8b2a15992487	633	for (i = 0; i < _FS_LOCK; i++) { /* Find the object */
adrevong	0:8b2a15992487	634	if (Files[i].fs == dp->fs &&
adrevong	0:8b2a15992487	635	Files[i].clu == dp->sclust &&
adrevong	0:8b2a15992487	636	Files[i].idx == dp->index) break;
adrevong	0:8b2a15992487	637	}
adrevong	0:8b2a15992487	638
adrevong	0:8b2a15992487	639	if (i == _FS_LOCK) { /* Not opened. Register it as new. */
adrevong	0:8b2a15992487	640	for (i = 0; i < _FS_LOCK && Files[i].fs; i++) ;
adrevong	0:8b2a15992487	641	if (i == _FS_LOCK) return 0; /* No free entry to register (int err) */
adrevong	0:8b2a15992487	642	Files[i].fs = dp->fs;
adrevong	0:8b2a15992487	643	Files[i].clu = dp->sclust;
adrevong	0:8b2a15992487	644	Files[i].idx = dp->index;
adrevong	0:8b2a15992487	645	Files[i].ctr = 0;
adrevong	0:8b2a15992487	646	}
adrevong	0:8b2a15992487	647
adrevong	0:8b2a15992487	648	if (acc && Files[i].ctr) return 0; /* Access violation (int err) */
adrevong	0:8b2a15992487	649
adrevong	0:8b2a15992487	650	Files[i].ctr = acc ? 0x100 : Files[i].ctr + 1; /* Set semaphore value */
adrevong	0:8b2a15992487	651
adrevong	0:8b2a15992487	652	return i + 1;
adrevong	0:8b2a15992487	653	}
adrevong	0:8b2a15992487	654
adrevong	0:8b2a15992487	655
adrevong	0:8b2a15992487	656	static
adrevong	0:8b2a15992487	657	FRESULT dec_lock ( /* Decrement object open counter */
adrevong	0:8b2a15992487	658	UINT i /* Semaphore index (1..) */
adrevong	0:8b2a15992487	659	)
adrevong	0:8b2a15992487	660	{
adrevong	0:8b2a15992487	661	WORD n;
adrevong	0:8b2a15992487	662	FRESULT res;
adrevong	0:8b2a15992487	663
adrevong	0:8b2a15992487	664
adrevong	0:8b2a15992487	665	if (--i < _FS_LOCK) { /* Shift index number origin from 0 */
adrevong	0:8b2a15992487	666	n = Files[i].ctr;
adrevong	0:8b2a15992487	667	if (n == 0x100) n = 0; /* If write mode open, delete the entry */
adrevong	0:8b2a15992487	668	if (n) n--; /* Decrement read mode open count */
adrevong	0:8b2a15992487	669	Files[i].ctr = n;
adrevong	0:8b2a15992487	670	if (!n) Files[i].fs = 0; /* Delete the entry if open count gets zero */
adrevong	0:8b2a15992487	671	res = FR_OK;
adrevong	0:8b2a15992487	672	} else {
adrevong	0:8b2a15992487	673	res = FR_INT_ERR; /* Invalid index nunber */
adrevong	0:8b2a15992487	674	}
adrevong	0:8b2a15992487	675	return res;
adrevong	0:8b2a15992487	676	}
adrevong	0:8b2a15992487	677
adrevong	0:8b2a15992487	678
adrevong	0:8b2a15992487	679	static
adrevong	0:8b2a15992487	680	void clear_lock ( /* Clear lock entries of the volume */
adrevong	0:8b2a15992487	681	FATFS *fs
adrevong	0:8b2a15992487	682	)
adrevong	0:8b2a15992487	683	{
adrevong	0:8b2a15992487	684	UINT i;
adrevong	0:8b2a15992487	685
adrevong	0:8b2a15992487	686	for (i = 0; i < _FS_LOCK; i++) {
adrevong	0:8b2a15992487	687	if (Files[i].fs == fs) Files[i].fs = 0;
adrevong	0:8b2a15992487	688	}
adrevong	0:8b2a15992487	689	}
adrevong	0:8b2a15992487	690	#endif
adrevong	0:8b2a15992487	691
adrevong	0:8b2a15992487	692
adrevong	0:8b2a15992487	693
adrevong	0:8b2a15992487	694
adrevong	0:8b2a15992487	695	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	696	/* Move/Flush disk access window in the file system object */
adrevong	0:8b2a15992487	697	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	698	#if !_FS_READONLY
adrevong	0:8b2a15992487	699	static
adrevong	0:8b2a15992487	700	FRESULT sync_window ( /* FR_OK:succeeded, !=0:error */
adrevong	0:8b2a15992487	701	FATFS* fs /* File system object */
adrevong	0:8b2a15992487	702	)
adrevong	0:8b2a15992487	703	{
adrevong	0:8b2a15992487	704	DWORD wsect;
adrevong	0:8b2a15992487	705	UINT nf;
adrevong	0:8b2a15992487	706	FRESULT res = FR_OK;
adrevong	0:8b2a15992487	707
adrevong	0:8b2a15992487	708
adrevong	0:8b2a15992487	709	if (fs->wflag) { /* Write back the sector if it is dirty */
adrevong	0:8b2a15992487	710	wsect = fs->winsect; /* Current sector number */
adrevong	0:8b2a15992487	711	if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK) {
adrevong	0:8b2a15992487	712	res = FR_DISK_ERR;
adrevong	0:8b2a15992487	713	} else {
adrevong	0:8b2a15992487	714	fs->wflag = 0;
adrevong	0:8b2a15992487	715	if (wsect - fs->fatbase < fs->fsize) { /* Is it in the FAT area? */
adrevong	0:8b2a15992487	716	for (nf = fs->n_fats; nf >= 2; nf--) { /* Reflect the change to all FAT copies */
adrevong	0:8b2a15992487	717	wsect += fs->fsize;
adrevong	0:8b2a15992487	718	disk_write(fs->drv, fs->win, wsect, 1);
adrevong	0:8b2a15992487	719	}
adrevong	0:8b2a15992487	720	}
adrevong	0:8b2a15992487	721	}
adrevong	0:8b2a15992487	722	}
adrevong	0:8b2a15992487	723	return res;
adrevong	0:8b2a15992487	724	}
adrevong	0:8b2a15992487	725	#endif
adrevong	0:8b2a15992487	726
adrevong	0:8b2a15992487	727
adrevong	0:8b2a15992487	728	static
adrevong	0:8b2a15992487	729	FRESULT move_window ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	730	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	731	DWORD sector /* Sector number to make appearance in the fs->win[] */
adrevong	0:8b2a15992487	732	)
adrevong	0:8b2a15992487	733	{
adrevong	0:8b2a15992487	734	FRESULT res = FR_OK;
adrevong	0:8b2a15992487	735
adrevong	0:8b2a15992487	736
adrevong	0:8b2a15992487	737	if (sector != fs->winsect) { /* Window offset changed? */
adrevong	0:8b2a15992487	738	#if !_FS_READONLY
adrevong	0:8b2a15992487	739	res = sync_window(fs); /* Write-back changes */
adrevong	0:8b2a15992487	740	#endif
adrevong	0:8b2a15992487	741	if (res == FR_OK) { /* Fill sector window with new data */
adrevong	0:8b2a15992487	742	if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK) {
adrevong	0:8b2a15992487	743	sector = 0xFFFFFFFF; /* Invalidate window if data is not reliable */
adrevong	0:8b2a15992487	744	res = FR_DISK_ERR;
adrevong	0:8b2a15992487	745	}
adrevong	0:8b2a15992487	746	fs->winsect = sector;
adrevong	0:8b2a15992487	747	}
adrevong	0:8b2a15992487	748	}
adrevong	0:8b2a15992487	749	return res;
adrevong	0:8b2a15992487	750	}
adrevong	0:8b2a15992487	751
adrevong	0:8b2a15992487	752
adrevong	0:8b2a15992487	753
adrevong	0:8b2a15992487	754
adrevong	0:8b2a15992487	755	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	756	/* Synchronize file system and strage device */
adrevong	0:8b2a15992487	757	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	758	#if !_FS_READONLY
adrevong	0:8b2a15992487	759	static
adrevong	0:8b2a15992487	760	FRESULT sync_fs ( /* FR_OK:succeeded, !=0:error */
adrevong	0:8b2a15992487	761	FATFS* fs /* File system object */
adrevong	0:8b2a15992487	762	)
adrevong	0:8b2a15992487	763	{
adrevong	0:8b2a15992487	764	FRESULT res;
adrevong	0:8b2a15992487	765
adrevong	0:8b2a15992487	766
adrevong	0:8b2a15992487	767	res = sync_window(fs);
adrevong	0:8b2a15992487	768	if (res == FR_OK) {
adrevong	0:8b2a15992487	769	/* Update FSInfo sector if needed */
adrevong	0:8b2a15992487	770	if (fs->fs_type == FS_FAT32 && fs->fsi_flag == 1) {
adrevong	0:8b2a15992487	771	/* Create FSInfo structure */
adrevong	0:8b2a15992487	772	mem_set(fs->win, 0, SS(fs));
adrevong	0:8b2a15992487	773	ST_WORD(fs->win + BS_55AA, 0xAA55);
adrevong	0:8b2a15992487	774	ST_DWORD(fs->win + FSI_LeadSig, 0x41615252);
adrevong	0:8b2a15992487	775	ST_DWORD(fs->win + FSI_StrucSig, 0x61417272);
adrevong	0:8b2a15992487	776	ST_DWORD(fs->win + FSI_Free_Count, fs->free_clust);
adrevong	0:8b2a15992487	777	ST_DWORD(fs->win + FSI_Nxt_Free, fs->last_clust);
adrevong	0:8b2a15992487	778	/* Write it into the FSInfo sector */
adrevong	0:8b2a15992487	779	fs->winsect = fs->volbase + 1;
adrevong	0:8b2a15992487	780	disk_write(fs->drv, fs->win, fs->winsect, 1);
adrevong	0:8b2a15992487	781	fs->fsi_flag = 0;
adrevong	0:8b2a15992487	782	}
adrevong	0:8b2a15992487	783	/* Make sure that no pending write process in the physical drive */
adrevong	0:8b2a15992487	784	if (disk_ioctl(fs->drv, CTRL_SYNC, 0) != RES_OK)
adrevong	0:8b2a15992487	785	res = FR_DISK_ERR;
adrevong	0:8b2a15992487	786	}
adrevong	0:8b2a15992487	787
adrevong	0:8b2a15992487	788	return res;
adrevong	0:8b2a15992487	789	}
adrevong	0:8b2a15992487	790	#endif
adrevong	0:8b2a15992487	791
adrevong	0:8b2a15992487	792
adrevong	0:8b2a15992487	793
adrevong	0:8b2a15992487	794
adrevong	0:8b2a15992487	795	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	796	/* Get sector# from cluster# */
adrevong	0:8b2a15992487	797	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	798	/* Hidden API for hacks and disk tools */
adrevong	0:8b2a15992487	799
adrevong	0:8b2a15992487	800	DWORD clust2sect ( /* !=0:Sector number, 0:Failed (invalid cluster#) */
adrevong	0:8b2a15992487	801	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	802	DWORD clst /* Cluster# to be converted */
adrevong	0:8b2a15992487	803	)
adrevong	0:8b2a15992487	804	{
adrevong	0:8b2a15992487	805	clst -= 2;
adrevong	0:8b2a15992487	806	if (clst >= fs->n_fatent - 2) return 0; /* Invalid cluster# */
adrevong	0:8b2a15992487	807	return clst * fs->csize + fs->database;
adrevong	0:8b2a15992487	808	}
adrevong	0:8b2a15992487	809
adrevong	0:8b2a15992487	810
adrevong	0:8b2a15992487	811
adrevong	0:8b2a15992487	812
adrevong	0:8b2a15992487	813	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	814	/* FAT access - Read value of a FAT entry */
adrevong	0:8b2a15992487	815	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	816	/* Hidden API for hacks and disk tools */
adrevong	0:8b2a15992487	817
adrevong	0:8b2a15992487	818	DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, 2..0x0FFFFFFF:Cluster status */
adrevong	0:8b2a15992487	819	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	820	DWORD clst /* FAT index number (cluster number) to get the value */
adrevong	0:8b2a15992487	821	)
adrevong	0:8b2a15992487	822	{
adrevong	0:8b2a15992487	823	UINT wc, bc;
adrevong	0:8b2a15992487	824	BYTE *p;
adrevong	0:8b2a15992487	825	DWORD val;
adrevong	0:8b2a15992487	826
adrevong	0:8b2a15992487	827
adrevong	0:8b2a15992487	828	if (clst < 2 \|\| clst >= fs->n_fatent) { /* Check if in valid range */
adrevong	0:8b2a15992487	829	val = 1; /* Internal error */
adrevong	0:8b2a15992487	830
adrevong	0:8b2a15992487	831	} else {
adrevong	0:8b2a15992487	832	val = 0xFFFFFFFF; /* Default value falls on disk error */
adrevong	0:8b2a15992487	833
adrevong	0:8b2a15992487	834	switch (fs->fs_type) {
adrevong	0:8b2a15992487	835	case FS_FAT12 :
adrevong	0:8b2a15992487	836	bc = (UINT)clst; bc += bc / 2;
adrevong	0:8b2a15992487	837	if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
adrevong	0:8b2a15992487	838	wc = fs->win[bc++ % SS(fs)];
adrevong	0:8b2a15992487	839	if (move_window(fs, fs->fatbase + (bc / SS(fs))) != FR_OK) break;
adrevong	0:8b2a15992487	840	wc \|= fs->win[bc % SS(fs)] << 8;
adrevong	0:8b2a15992487	841	val = clst & 1 ? wc >> 4 : (wc & 0xFFF);
adrevong	0:8b2a15992487	842	break;
adrevong	0:8b2a15992487	843
adrevong	0:8b2a15992487	844	case FS_FAT16 :
adrevong	0:8b2a15992487	845	if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2))) != FR_OK) break;
adrevong	0:8b2a15992487	846	p = &fs->win[clst * 2 % SS(fs)];
adrevong	0:8b2a15992487	847	val = LD_WORD(p);
adrevong	0:8b2a15992487	848	break;
adrevong	0:8b2a15992487	849
adrevong	0:8b2a15992487	850	case FS_FAT32 :
adrevong	0:8b2a15992487	851	if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4))) != FR_OK) break;
adrevong	0:8b2a15992487	852	p = &fs->win[clst * 4 % SS(fs)];
adrevong	0:8b2a15992487	853	val = LD_DWORD(p) & 0x0FFFFFFF;
adrevong	0:8b2a15992487	854	break;
adrevong	0:8b2a15992487	855
adrevong	0:8b2a15992487	856	default:
adrevong	0:8b2a15992487	857	val = 1; /* Internal error */
adrevong	0:8b2a15992487	858	}
adrevong	0:8b2a15992487	859	}
adrevong	0:8b2a15992487	860
adrevong	0:8b2a15992487	861	return val;
adrevong	0:8b2a15992487	862	}
adrevong	0:8b2a15992487	863
adrevong	0:8b2a15992487	864
adrevong	0:8b2a15992487	865
adrevong	0:8b2a15992487	866
adrevong	0:8b2a15992487	867	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	868	/* FAT access - Change value of a FAT entry */
adrevong	0:8b2a15992487	869	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	870	/* Hidden API for hacks and disk tools */
adrevong	0:8b2a15992487	871
adrevong	0:8b2a15992487	872	#if !_FS_READONLY
adrevong	0:8b2a15992487	873	FRESULT put_fat ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	874	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	875	DWORD clst, /* FAT index number (cluster number) to be changed */
adrevong	0:8b2a15992487	876	DWORD val /* New value to be set to the entry */
adrevong	0:8b2a15992487	877	)
adrevong	0:8b2a15992487	878	{
adrevong	0:8b2a15992487	879	UINT bc;
adrevong	0:8b2a15992487	880	BYTE *p;
adrevong	0:8b2a15992487	881	FRESULT res;
adrevong	0:8b2a15992487	882
adrevong	0:8b2a15992487	883
adrevong	0:8b2a15992487	884	if (clst < 2 \|\| clst >= fs->n_fatent) { /* Check if in valid range */
adrevong	0:8b2a15992487	885	res = FR_INT_ERR;
adrevong	0:8b2a15992487	886
adrevong	0:8b2a15992487	887	} else {
adrevong	0:8b2a15992487	888	switch (fs->fs_type) {
adrevong	0:8b2a15992487	889	case FS_FAT12 :
adrevong	0:8b2a15992487	890	bc = (UINT)clst; bc += bc / 2;
adrevong	0:8b2a15992487	891	res = move_window(fs, fs->fatbase + (bc / SS(fs)));
adrevong	0:8b2a15992487	892	if (res != FR_OK) break;
adrevong	0:8b2a15992487	893	p = &fs->win[bc++ % SS(fs)];
adrevong	0:8b2a15992487	894	p = (clst & 1) ? ((p & 0x0F) \| ((BYTE)val << 4)) : (BYTE)val;
adrevong	0:8b2a15992487	895	fs->wflag = 1;
adrevong	0:8b2a15992487	896	res = move_window(fs, fs->fatbase + (bc / SS(fs)));
adrevong	0:8b2a15992487	897	if (res != FR_OK) break;
adrevong	0:8b2a15992487	898	p = &fs->win[bc % SS(fs)];
adrevong	0:8b2a15992487	899	p = (clst & 1) ? (BYTE)(val >> 4) : ((p & 0xF0) \| ((BYTE)(val >> 8) & 0x0F));
adrevong	0:8b2a15992487	900	fs->wflag = 1;
adrevong	0:8b2a15992487	901	break;
adrevong	0:8b2a15992487	902
adrevong	0:8b2a15992487	903	case FS_FAT16 :
adrevong	0:8b2a15992487	904	res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
adrevong	0:8b2a15992487	905	if (res != FR_OK) break;
adrevong	0:8b2a15992487	906	p = &fs->win[clst * 2 % SS(fs)];
adrevong	0:8b2a15992487	907	ST_WORD(p, (WORD)val);
adrevong	0:8b2a15992487	908	fs->wflag = 1;
adrevong	0:8b2a15992487	909	break;
adrevong	0:8b2a15992487	910
adrevong	0:8b2a15992487	911	case FS_FAT32 :
adrevong	0:8b2a15992487	912	res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
adrevong	0:8b2a15992487	913	if (res != FR_OK) break;
adrevong	0:8b2a15992487	914	p = &fs->win[clst * 4 % SS(fs)];
adrevong	0:8b2a15992487	915	val \|= LD_DWORD(p) & 0xF0000000;
adrevong	0:8b2a15992487	916	ST_DWORD(p, val);
adrevong	0:8b2a15992487	917	fs->wflag = 1;
adrevong	0:8b2a15992487	918	break;
adrevong	0:8b2a15992487	919
adrevong	0:8b2a15992487	920	default :
adrevong	0:8b2a15992487	921	res = FR_INT_ERR;
adrevong	0:8b2a15992487	922	}
adrevong	0:8b2a15992487	923	}
adrevong	0:8b2a15992487	924
adrevong	0:8b2a15992487	925	return res;
adrevong	0:8b2a15992487	926	}
adrevong	0:8b2a15992487	927	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	928
adrevong	0:8b2a15992487	929
adrevong	0:8b2a15992487	930
adrevong	0:8b2a15992487	931
adrevong	0:8b2a15992487	932	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	933	/* FAT handling - Remove a cluster chain */
adrevong	0:8b2a15992487	934	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	935	#if !_FS_READONLY
adrevong	0:8b2a15992487	936	static
adrevong	0:8b2a15992487	937	FRESULT remove_chain ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	938	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	939	DWORD clst /* Cluster# to remove a chain from */
adrevong	0:8b2a15992487	940	)
adrevong	0:8b2a15992487	941	{
adrevong	0:8b2a15992487	942	FRESULT res;
adrevong	0:8b2a15992487	943	DWORD nxt;
adrevong	0:8b2a15992487	944	#if _USE_TRIM
adrevong	0:8b2a15992487	945	DWORD scl = clst, ecl = clst, rt[2];
adrevong	0:8b2a15992487	946	#endif
adrevong	0:8b2a15992487	947
adrevong	0:8b2a15992487	948	if (clst < 2 \|\| clst >= fs->n_fatent) { /* Check if in valid range */
adrevong	0:8b2a15992487	949	res = FR_INT_ERR;
adrevong	0:8b2a15992487	950
adrevong	0:8b2a15992487	951	} else {
adrevong	0:8b2a15992487	952	res = FR_OK;
adrevong	0:8b2a15992487	953	while (clst < fs->n_fatent) { /* Not a last link? */
adrevong	0:8b2a15992487	954	nxt = get_fat(fs, clst); /* Get cluster status */
adrevong	0:8b2a15992487	955	if (nxt == 0) break; /* Empty cluster? */
adrevong	0:8b2a15992487	956	if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
adrevong	0:8b2a15992487	957	if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
adrevong	0:8b2a15992487	958	res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
adrevong	0:8b2a15992487	959	if (res != FR_OK) break;
adrevong	0:8b2a15992487	960	if (fs->free_clust != 0xFFFFFFFF) { /* Update FSINFO */
adrevong	0:8b2a15992487	961	fs->free_clust++;
adrevong	0:8b2a15992487	962	fs->fsi_flag \|= 1;
adrevong	0:8b2a15992487	963	}
adrevong	0:8b2a15992487	964	#if _USE_TRIM
adrevong	0:8b2a15992487	965	if (ecl + 1 == nxt) { /* Is next cluster contiguous? */
adrevong	0:8b2a15992487	966	ecl = nxt;
adrevong	0:8b2a15992487	967	} else { /* End of contiguous clusters */
adrevong	0:8b2a15992487	968	rt[0] = clust2sect(fs, scl); /* Start sector */
adrevong	0:8b2a15992487	969	rt[1] = clust2sect(fs, ecl) + fs->csize - 1; /* End sector */
adrevong	0:8b2a15992487	970	disk_ioctl(fs->drv, CTRL_TRIM, rt); /* Erase the block */
adrevong	0:8b2a15992487	971	scl = ecl = nxt;
adrevong	0:8b2a15992487	972	}
adrevong	0:8b2a15992487	973	#endif
adrevong	0:8b2a15992487	974	clst = nxt; /* Next cluster */
adrevong	0:8b2a15992487	975	}
adrevong	0:8b2a15992487	976	}
adrevong	0:8b2a15992487	977
adrevong	0:8b2a15992487	978	return res;
adrevong	0:8b2a15992487	979	}
adrevong	0:8b2a15992487	980	#endif
adrevong	0:8b2a15992487	981
adrevong	0:8b2a15992487	982
adrevong	0:8b2a15992487	983
adrevong	0:8b2a15992487	984
adrevong	0:8b2a15992487	985	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	986	/* FAT handling - Stretch or Create a cluster chain */
adrevong	0:8b2a15992487	987	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	988	#if !_FS_READONLY
adrevong	0:8b2a15992487	989	static
adrevong	0:8b2a15992487	990	DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
adrevong	0:8b2a15992487	991	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	992	DWORD clst /* Cluster# to stretch, 0:Create a new chain */
adrevong	0:8b2a15992487	993	)
adrevong	0:8b2a15992487	994	{
adrevong	0:8b2a15992487	995	DWORD cs, ncl, scl;
adrevong	0:8b2a15992487	996	FRESULT res;
adrevong	0:8b2a15992487	997
adrevong	0:8b2a15992487	998
adrevong	0:8b2a15992487	999	if (clst == 0) { /* Create a new chain */
adrevong	0:8b2a15992487	1000	scl = fs->last_clust; /* Get suggested start point */
adrevong	0:8b2a15992487	1001	if (!scl \|\| scl >= fs->n_fatent) scl = 1;
adrevong	0:8b2a15992487	1002	}
adrevong	0:8b2a15992487	1003	else { /* Stretch the current chain */
adrevong	0:8b2a15992487	1004	cs = get_fat(fs, clst); /* Check the cluster status */
adrevong	0:8b2a15992487	1005	if (cs < 2) return 1; /* Invalid value */
adrevong	0:8b2a15992487	1006	if (cs == 0xFFFFFFFF) return cs; /* A disk error occurred */
adrevong	0:8b2a15992487	1007	if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
adrevong	0:8b2a15992487	1008	scl = clst;
adrevong	0:8b2a15992487	1009	}
adrevong	0:8b2a15992487	1010
adrevong	0:8b2a15992487	1011	ncl = scl; /* Start cluster */
adrevong	0:8b2a15992487	1012	for (;;) {
adrevong	0:8b2a15992487	1013	ncl++; /* Next cluster */
adrevong	0:8b2a15992487	1014	if (ncl >= fs->n_fatent) { /* Check wrap around */
adrevong	0:8b2a15992487	1015	ncl = 2;
adrevong	0:8b2a15992487	1016	if (ncl > scl) return 0; /* No free cluster */
adrevong	0:8b2a15992487	1017	}
adrevong	0:8b2a15992487	1018	cs = get_fat(fs, ncl); /* Get the cluster status */
adrevong	0:8b2a15992487	1019	if (cs == 0) break; /* Found a free cluster */
adrevong	0:8b2a15992487	1020	if (cs == 0xFFFFFFFF \|\| cs == 1)/* An error occurred */
adrevong	0:8b2a15992487	1021	return cs;
adrevong	0:8b2a15992487	1022	if (ncl == scl) return 0; /* No free cluster */
adrevong	0:8b2a15992487	1023	}
adrevong	0:8b2a15992487	1024
adrevong	0:8b2a15992487	1025	res = put_fat(fs, ncl, 0x0FFFFFFF); /* Mark the new cluster "last link" */
adrevong	0:8b2a15992487	1026	if (res == FR_OK && clst != 0) {
adrevong	0:8b2a15992487	1027	res = put_fat(fs, clst, ncl); /* Link it to the previous one if needed */
adrevong	0:8b2a15992487	1028	}
adrevong	0:8b2a15992487	1029	if (res == FR_OK) {
adrevong	0:8b2a15992487	1030	fs->last_clust = ncl; /* Update FSINFO */
adrevong	0:8b2a15992487	1031	if (fs->free_clust != 0xFFFFFFFF) {
adrevong	0:8b2a15992487	1032	fs->free_clust--;
adrevong	0:8b2a15992487	1033	fs->fsi_flag \|= 1;
adrevong	0:8b2a15992487	1034	}
adrevong	0:8b2a15992487	1035	} else {
adrevong	0:8b2a15992487	1036	ncl = (res == FR_DISK_ERR) ? 0xFFFFFFFF : 1;
adrevong	0:8b2a15992487	1037	}
adrevong	0:8b2a15992487	1038
adrevong	0:8b2a15992487	1039	return ncl; /* Return new cluster number or error code */
adrevong	0:8b2a15992487	1040	}
adrevong	0:8b2a15992487	1041	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	1042
adrevong	0:8b2a15992487	1043
adrevong	0:8b2a15992487	1044
adrevong	0:8b2a15992487	1045
adrevong	0:8b2a15992487	1046	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1047	/* FAT handling - Convert offset into cluster with link map table */
adrevong	0:8b2a15992487	1048	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1049
adrevong	0:8b2a15992487	1050	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	1051	static
adrevong	0:8b2a15992487	1052	DWORD clmt_clust ( /* <2:Error, >=2:Cluster number */
adrevong	0:8b2a15992487	1053	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	1054	DWORD ofs /* File offset to be converted to cluster# */
adrevong	0:8b2a15992487	1055	)
adrevong	0:8b2a15992487	1056	{
adrevong	0:8b2a15992487	1057	DWORD cl, ncl, *tbl;
adrevong	0:8b2a15992487	1058
adrevong	0:8b2a15992487	1059
adrevong	0:8b2a15992487	1060	tbl = fp->cltbl + 1; /* Top of CLMT */
adrevong	0:8b2a15992487	1061	cl = ofs / SS(fp->fs) / fp->fs->csize; /* Cluster order from top of the file */
adrevong	0:8b2a15992487	1062	for (;;) {
adrevong	0:8b2a15992487	1063	ncl = tbl++; / Number of cluters in the fragment */
adrevong	0:8b2a15992487	1064	if (!ncl) return 0; /* End of table? (error) */
adrevong	0:8b2a15992487	1065	if (cl < ncl) break; /* In this fragment? */
adrevong	0:8b2a15992487	1066	cl -= ncl; tbl++; /* Next fragment */
adrevong	0:8b2a15992487	1067	}
adrevong	0:8b2a15992487	1068	return cl + tbl; / Return the cluster number */
adrevong	0:8b2a15992487	1069	}
adrevong	0:8b2a15992487	1070	#endif /* _USE_FASTSEEK */
adrevong	0:8b2a15992487	1071
adrevong	0:8b2a15992487	1072
adrevong	0:8b2a15992487	1073
adrevong	0:8b2a15992487	1074
adrevong	0:8b2a15992487	1075	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1076	/* Directory handling - Set directory index */
adrevong	0:8b2a15992487	1077	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1078
adrevong	0:8b2a15992487	1079	static
adrevong	0:8b2a15992487	1080	FRESULT dir_sdi ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	1081	FATFS_DIR* dp, /* Pointer to directory object */
adrevong	0:8b2a15992487	1082	UINT idx /* Index of directory table */
adrevong	0:8b2a15992487	1083	)
adrevong	0:8b2a15992487	1084	{
adrevong	0:8b2a15992487	1085	DWORD clst, sect;
adrevong	0:8b2a15992487	1086	UINT ic;
adrevong	0:8b2a15992487	1087
adrevong	0:8b2a15992487	1088
adrevong	0:8b2a15992487	1089	dp->index = (WORD)idx; /* Current index */
adrevong	0:8b2a15992487	1090	clst = dp->sclust; /* Table start cluster (0:root) */
adrevong	0:8b2a15992487	1091	if (clst == 1 \|\| clst >= dp->fs->n_fatent) /* Check start cluster range */
adrevong	0:8b2a15992487	1092	return FR_INT_ERR;
adrevong	0:8b2a15992487	1093	if (!clst && dp->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
adrevong	0:8b2a15992487	1094	clst = dp->fs->dirbase;
adrevong	0:8b2a15992487	1095
adrevong	0:8b2a15992487	1096	if (clst == 0) { /* Static table (root-directory in FAT12/16) */
adrevong	0:8b2a15992487	1097	if (idx >= dp->fs->n_rootdir) /* Is index out of range? */
adrevong	0:8b2a15992487	1098	return FR_INT_ERR;
adrevong	0:8b2a15992487	1099	sect = dp->fs->dirbase;
adrevong	0:8b2a15992487	1100	}
adrevong	0:8b2a15992487	1101	else { /* Dynamic table (root-directory in FAT32 or sub-directory) */
adrevong	0:8b2a15992487	1102	ic = SS(dp->fs) / SZ_DIRE * dp->fs->csize; /* Entries per cluster */
adrevong	0:8b2a15992487	1103	while (idx >= ic) { /* Follow cluster chain */
adrevong	0:8b2a15992487	1104	clst = get_fat(dp->fs, clst); /* Get next cluster */
adrevong	0:8b2a15992487	1105	if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
adrevong	0:8b2a15992487	1106	if (clst < 2 \|\| clst >= dp->fs->n_fatent) /* Reached to end of table or internal error */
adrevong	0:8b2a15992487	1107	return FR_INT_ERR;
adrevong	0:8b2a15992487	1108	idx -= ic;
adrevong	0:8b2a15992487	1109	}
adrevong	0:8b2a15992487	1110	sect = clust2sect(dp->fs, clst);
adrevong	0:8b2a15992487	1111	}
adrevong	0:8b2a15992487	1112	dp->clust = clst; /* Current cluster# */
adrevong	0:8b2a15992487	1113	if (!sect) return FR_INT_ERR;
adrevong	0:8b2a15992487	1114	dp->sect = sect + idx / (SS(dp->fs) / SZ_DIRE); /* Sector# of the directory entry */
adrevong	0:8b2a15992487	1115	dp->dir = dp->fs->win + (idx % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Ptr to the entry in the sector */
adrevong	0:8b2a15992487	1116
adrevong	0:8b2a15992487	1117	return FR_OK;
adrevong	0:8b2a15992487	1118	}
adrevong	0:8b2a15992487	1119
adrevong	0:8b2a15992487	1120
adrevong	0:8b2a15992487	1121
adrevong	0:8b2a15992487	1122
adrevong	0:8b2a15992487	1123	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1124	/* Directory handling - Move directory table index next */
adrevong	0:8b2a15992487	1125	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1126
adrevong	0:8b2a15992487	1127	static
adrevong	0:8b2a15992487	1128	FRESULT dir_next ( /* FR_OK(0):succeeded, FR_NO_FILE:End of table, FR_DENIED:Could not stretch */
adrevong	0:8b2a15992487	1129	FATFS_DIR* dp, /* Pointer to the directory object */
adrevong	0:8b2a15992487	1130	int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
adrevong	0:8b2a15992487	1131	)
adrevong	0:8b2a15992487	1132	{
adrevong	0:8b2a15992487	1133	DWORD clst;
adrevong	0:8b2a15992487	1134	UINT i;
adrevong	0:8b2a15992487	1135	#if !_FS_READONLY
adrevong	0:8b2a15992487	1136	UINT c;
adrevong	0:8b2a15992487	1137	#endif
adrevong	0:8b2a15992487	1138
adrevong	0:8b2a15992487	1139
adrevong	0:8b2a15992487	1140	i = dp->index + 1;
adrevong	0:8b2a15992487	1141	if (!(i & 0xFFFF) \|\| !dp->sect) /* Report EOT when index has reached 65535 */
adrevong	0:8b2a15992487	1142	return FR_NO_FILE;
adrevong	0:8b2a15992487	1143
adrevong	0:8b2a15992487	1144	if (!(i % (SS(dp->fs) / SZ_DIRE))) { /* Sector changed? */
adrevong	0:8b2a15992487	1145	dp->sect++; /* Next sector */
adrevong	0:8b2a15992487	1146
adrevong	0:8b2a15992487	1147	if (!dp->clust) { /* Static table */
adrevong	0:8b2a15992487	1148	if (i >= dp->fs->n_rootdir) /* Report EOT if it reached end of static table */
adrevong	0:8b2a15992487	1149	return FR_NO_FILE;
adrevong	0:8b2a15992487	1150	}
adrevong	0:8b2a15992487	1151	else { /* Dynamic table */
adrevong	0:8b2a15992487	1152	if (((i / (SS(dp->fs) / SZ_DIRE)) & (dp->fs->csize - 1)) == 0) { /* Cluster changed? */
adrevong	0:8b2a15992487	1153	clst = get_fat(dp->fs, dp->clust); /* Get next cluster */
adrevong	0:8b2a15992487	1154	if (clst <= 1) return FR_INT_ERR;
adrevong	0:8b2a15992487	1155	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
adrevong	0:8b2a15992487	1156	if (clst >= dp->fs->n_fatent) { /* If it reached end of dynamic table, */
adrevong	0:8b2a15992487	1157	#if !_FS_READONLY
adrevong	0:8b2a15992487	1158	if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT */
adrevong	0:8b2a15992487	1159	clst = create_chain(dp->fs, dp->clust); /* Stretch cluster chain */
adrevong	0:8b2a15992487	1160	if (clst == 0) return FR_DENIED; /* No free cluster */
adrevong	0:8b2a15992487	1161	if (clst == 1) return FR_INT_ERR;
adrevong	0:8b2a15992487	1162	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
adrevong	0:8b2a15992487	1163	/* Clean-up stretched table */
adrevong	0:8b2a15992487	1164	if (sync_window(dp->fs)) return FR_DISK_ERR;/* Flush disk access window */
adrevong	0:8b2a15992487	1165	mem_set(dp->fs->win, 0, SS(dp->fs)); /* Clear window buffer */
adrevong	0:8b2a15992487	1166	dp->fs->winsect = clust2sect(dp->fs, clst); /* Cluster start sector */
adrevong	0:8b2a15992487	1167	for (c = 0; c < dp->fs->csize; c++) { /* Fill the new cluster with 0 */
adrevong	0:8b2a15992487	1168	dp->fs->wflag = 1;
adrevong	0:8b2a15992487	1169	if (sync_window(dp->fs)) return FR_DISK_ERR;
adrevong	0:8b2a15992487	1170	dp->fs->winsect++;
adrevong	0:8b2a15992487	1171	}
adrevong	0:8b2a15992487	1172	dp->fs->winsect -= c; /* Rewind window offset */
adrevong	0:8b2a15992487	1173	#else
adrevong	0:8b2a15992487	1174	if (!stretch) return FR_NO_FILE; /* If do not stretch, report EOT (this is to suppress warning) */
adrevong	0:8b2a15992487	1175	return FR_NO_FILE; /* Report EOT */
adrevong	0:8b2a15992487	1176	#endif
adrevong	0:8b2a15992487	1177	}
adrevong	0:8b2a15992487	1178	dp->clust = clst; /* Initialize data for new cluster */
adrevong	0:8b2a15992487	1179	dp->sect = clust2sect(dp->fs, clst);
adrevong	0:8b2a15992487	1180	}
adrevong	0:8b2a15992487	1181	}
adrevong	0:8b2a15992487	1182	}
adrevong	0:8b2a15992487	1183
adrevong	0:8b2a15992487	1184	dp->index = (WORD)i; /* Current index */
adrevong	0:8b2a15992487	1185	dp->dir = dp->fs->win + (i % (SS(dp->fs) / SZ_DIRE)) * SZ_DIRE; /* Current entry in the window */
adrevong	0:8b2a15992487	1186
adrevong	0:8b2a15992487	1187	return FR_OK;
adrevong	0:8b2a15992487	1188	}
adrevong	0:8b2a15992487	1189
adrevong	0:8b2a15992487	1190
adrevong	0:8b2a15992487	1191
adrevong	0:8b2a15992487	1192
adrevong	0:8b2a15992487	1193	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1194	/* Directory handling - Reserve directory entry */
adrevong	0:8b2a15992487	1195	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1196
adrevong	0:8b2a15992487	1197	#if !_FS_READONLY
adrevong	0:8b2a15992487	1198	static
adrevong	0:8b2a15992487	1199	FRESULT dir_alloc ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	1200	FATFS_DIR* dp, /* Pointer to the directory object */
adrevong	0:8b2a15992487	1201	UINT nent /* Number of contiguous entries to allocate (1-21) */
adrevong	0:8b2a15992487	1202	)
adrevong	0:8b2a15992487	1203	{
adrevong	0:8b2a15992487	1204	FRESULT res;
adrevong	0:8b2a15992487	1205	UINT n;
adrevong	0:8b2a15992487	1206
adrevong	0:8b2a15992487	1207
adrevong	0:8b2a15992487	1208	res = dir_sdi(dp, 0);
adrevong	0:8b2a15992487	1209	if (res == FR_OK) {
adrevong	0:8b2a15992487	1210	n = 0;
adrevong	0:8b2a15992487	1211	do {
adrevong	0:8b2a15992487	1212	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1213	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1214	if (dp->dir[0] == DDEM \|\| dp->dir[0] == 0) { /* Is it a free entry? */
adrevong	0:8b2a15992487	1215	if (++n == nent) break; /* A block of contiguous free entries is found */
adrevong	0:8b2a15992487	1216	} else {
adrevong	0:8b2a15992487	1217	n = 0; /* Not a blank entry. Restart to search */
adrevong	0:8b2a15992487	1218	}
adrevong	0:8b2a15992487	1219	res = dir_next(dp, 1); /* Next entry with table stretch enabled */
adrevong	0:8b2a15992487	1220	} while (res == FR_OK);
adrevong	0:8b2a15992487	1221	}
adrevong	0:8b2a15992487	1222	if (res == FR_NO_FILE) res = FR_DENIED; /* No directory entry to allocate */
adrevong	0:8b2a15992487	1223	return res;
adrevong	0:8b2a15992487	1224	}
adrevong	0:8b2a15992487	1225	#endif
adrevong	0:8b2a15992487	1226
adrevong	0:8b2a15992487	1227
adrevong	0:8b2a15992487	1228
adrevong	0:8b2a15992487	1229
adrevong	0:8b2a15992487	1230	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1231	/* Directory handling - Load/Store start cluster number */
adrevong	0:8b2a15992487	1232	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1233
adrevong	0:8b2a15992487	1234	static
adrevong	0:8b2a15992487	1235	DWORD ld_clust ( /* Returns the top cluster value of the SFN entry */
adrevong	0:8b2a15992487	1236	FATFS* fs, /* Pointer to the fs object */
adrevong	0:8b2a15992487	1237	const BYTE* dir /* Pointer to the SFN entry */
adrevong	0:8b2a15992487	1238	)
adrevong	0:8b2a15992487	1239	{
adrevong	0:8b2a15992487	1240	DWORD cl;
adrevong	0:8b2a15992487	1241
adrevong	0:8b2a15992487	1242	cl = LD_WORD(dir + DIR_FstClusLO);
adrevong	0:8b2a15992487	1243	if (fs->fs_type == FS_FAT32)
adrevong	0:8b2a15992487	1244	cl \|= (DWORD)LD_WORD(dir + DIR_FstClusHI) << 16;
adrevong	0:8b2a15992487	1245
adrevong	0:8b2a15992487	1246	return cl;
adrevong	0:8b2a15992487	1247	}
adrevong	0:8b2a15992487	1248
adrevong	0:8b2a15992487	1249
adrevong	0:8b2a15992487	1250	#if !_FS_READONLY
adrevong	0:8b2a15992487	1251	static
adrevong	0:8b2a15992487	1252	void st_clust (
adrevong	0:8b2a15992487	1253	BYTE* dir, /* Pointer to the SFN entry */
adrevong	0:8b2a15992487	1254	DWORD cl /* Value to be set */
adrevong	0:8b2a15992487	1255	)
adrevong	0:8b2a15992487	1256	{
adrevong	0:8b2a15992487	1257	ST_WORD(dir + DIR_FstClusLO, cl);
adrevong	0:8b2a15992487	1258	ST_WORD(dir + DIR_FstClusHI, cl >> 16);
adrevong	0:8b2a15992487	1259	}
adrevong	0:8b2a15992487	1260	#endif
adrevong	0:8b2a15992487	1261
adrevong	0:8b2a15992487	1262
adrevong	0:8b2a15992487	1263
adrevong	0:8b2a15992487	1264
adrevong	0:8b2a15992487	1265	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1266	/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
adrevong	0:8b2a15992487	1267	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1268	#if _USE_LFN
adrevong	0:8b2a15992487	1269	static
adrevong	0:8b2a15992487	1270	const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN characters in the directory entry */
adrevong	0:8b2a15992487	1271
adrevong	0:8b2a15992487	1272
adrevong	0:8b2a15992487	1273	static
adrevong	0:8b2a15992487	1274	int cmp_lfn ( /* 1:matched, 0:not matched */
adrevong	0:8b2a15992487	1275	WCHAR* lfnbuf, /* Pointer to the LFN working buffer to be compared */
adrevong	0:8b2a15992487	1276	BYTE* dir /* Pointer to the directory entry containing the part of LFN */
adrevong	0:8b2a15992487	1277	)
adrevong	0:8b2a15992487	1278	{
adrevong	0:8b2a15992487	1279	UINT i, s;
adrevong	0:8b2a15992487	1280	WCHAR wc, uc;
adrevong	0:8b2a15992487	1281
adrevong	0:8b2a15992487	1282
adrevong	0:8b2a15992487	1283	if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
adrevong	0:8b2a15992487	1284
adrevong	0:8b2a15992487	1285	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
adrevong	0:8b2a15992487	1286
adrevong	0:8b2a15992487	1287	for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
adrevong	0:8b2a15992487	1288	uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
adrevong	0:8b2a15992487	1289	if (wc) {
adrevong	0:8b2a15992487	1290	if (i >= _MAX_LFN \|\| ff_wtoupper(uc) != ff_wtoupper(lfnbuf[i++])) /* Compare it */
adrevong	0:8b2a15992487	1291	return 0; /* Not matched */
adrevong	0:8b2a15992487	1292	wc = uc;
adrevong	0:8b2a15992487	1293	} else {
adrevong	0:8b2a15992487	1294	if (uc != 0xFFFF) return 0; /* Check filler */
adrevong	0:8b2a15992487	1295	}
adrevong	0:8b2a15992487	1296	}
adrevong	0:8b2a15992487	1297
adrevong	0:8b2a15992487	1298	if ((dir[LDIR_Ord] & LLEF) && wc && lfnbuf[i]) /* Last segment matched but different length */
adrevong	0:8b2a15992487	1299	return 0;
adrevong	0:8b2a15992487	1300
adrevong	0:8b2a15992487	1301	return 1; /* The part of LFN matched */
adrevong	0:8b2a15992487	1302	}
adrevong	0:8b2a15992487	1303
adrevong	0:8b2a15992487	1304
adrevong	0:8b2a15992487	1305
adrevong	0:8b2a15992487	1306	static
adrevong	0:8b2a15992487	1307	int pick_lfn ( /* 1:succeeded, 0:buffer overflow or invalid LFN entry */
adrevong	0:8b2a15992487	1308	WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
adrevong	0:8b2a15992487	1309	BYTE* dir /* Pointer to the LFN entry */
adrevong	0:8b2a15992487	1310	)
adrevong	0:8b2a15992487	1311	{
adrevong	0:8b2a15992487	1312	UINT i, s;
adrevong	0:8b2a15992487	1313	WCHAR wc, uc;
adrevong	0:8b2a15992487	1314
adrevong	0:8b2a15992487	1315
adrevong	0:8b2a15992487	1316	if (LD_WORD(dir + LDIR_FstClusLO) != 0) return 0; /* Check LDIR_FstClusLO */
adrevong	0:8b2a15992487	1317
adrevong	0:8b2a15992487	1318	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
adrevong	0:8b2a15992487	1319
adrevong	0:8b2a15992487	1320	for (wc = 1, s = 0; s < 13; s++) { /* Process all characters in the entry */
adrevong	0:8b2a15992487	1321	uc = LD_WORD(dir + LfnOfs[s]); /* Pick an LFN character */
adrevong	0:8b2a15992487	1322	if (wc) {
adrevong	0:8b2a15992487	1323	if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
adrevong	0:8b2a15992487	1324	lfnbuf[i++] = wc = uc; /* Store it */
adrevong	0:8b2a15992487	1325	} else {
adrevong	0:8b2a15992487	1326	if (uc != 0xFFFF) return 0; /* Check filler */
adrevong	0:8b2a15992487	1327	}
adrevong	0:8b2a15992487	1328	}
adrevong	0:8b2a15992487	1329
adrevong	0:8b2a15992487	1330	if (dir[LDIR_Ord] & LLEF) { /* Put terminator if it is the last LFN part */
adrevong	0:8b2a15992487	1331	if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
adrevong	0:8b2a15992487	1332	lfnbuf[i] = 0;
adrevong	0:8b2a15992487	1333	}
adrevong	0:8b2a15992487	1334
adrevong	0:8b2a15992487	1335	return 1; /* The part of LFN is valid */
adrevong	0:8b2a15992487	1336	}
adrevong	0:8b2a15992487	1337
adrevong	0:8b2a15992487	1338
adrevong	0:8b2a15992487	1339	#if !_FS_READONLY
adrevong	0:8b2a15992487	1340	static
adrevong	0:8b2a15992487	1341	void fit_lfn (
adrevong	0:8b2a15992487	1342	const WCHAR* lfnbuf, /* Pointer to the LFN working buffer */
adrevong	0:8b2a15992487	1343	BYTE* dir, /* Pointer to the LFN entry to be processed */
adrevong	0:8b2a15992487	1344	BYTE ord, /* LFN order (1-20) */
adrevong	0:8b2a15992487	1345	BYTE sum /* Checksum of the corresponding SFN */
adrevong	0:8b2a15992487	1346	)
adrevong	0:8b2a15992487	1347	{
adrevong	0:8b2a15992487	1348	UINT i, s;
adrevong	0:8b2a15992487	1349	WCHAR wc;
adrevong	0:8b2a15992487	1350
adrevong	0:8b2a15992487	1351
adrevong	0:8b2a15992487	1352	dir[LDIR_Chksum] = sum; /* Set checksum */
adrevong	0:8b2a15992487	1353	dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
adrevong	0:8b2a15992487	1354	dir[LDIR_Type] = 0;
adrevong	0:8b2a15992487	1355	ST_WORD(dir + LDIR_FstClusLO, 0);
adrevong	0:8b2a15992487	1356
adrevong	0:8b2a15992487	1357	i = (ord - 1) * 13; /* Get offset in the LFN working buffer */
adrevong	0:8b2a15992487	1358	s = wc = 0;
adrevong	0:8b2a15992487	1359	do {
adrevong	0:8b2a15992487	1360	if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective character */
adrevong	0:8b2a15992487	1361	ST_WORD(dir+LfnOfs[s], wc); /* Put it */
adrevong	0:8b2a15992487	1362	if (!wc) wc = 0xFFFF; /* Padding characters following last character */
adrevong	0:8b2a15992487	1363	} while (++s < 13);
adrevong	0:8b2a15992487	1364	if (wc == 0xFFFF \|\| !lfnbuf[i]) ord \|= LLEF; /* Bottom LFN part is the start of LFN sequence */
adrevong	0:8b2a15992487	1365	dir[LDIR_Ord] = ord; /* Set the LFN order */
adrevong	0:8b2a15992487	1366	}
adrevong	0:8b2a15992487	1367
adrevong	0:8b2a15992487	1368	#endif
adrevong	0:8b2a15992487	1369	#endif
adrevong	0:8b2a15992487	1370
adrevong	0:8b2a15992487	1371
adrevong	0:8b2a15992487	1372
adrevong	0:8b2a15992487	1373
adrevong	0:8b2a15992487	1374	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1375	/* Create numbered name */
adrevong	0:8b2a15992487	1376	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1377	#if _USE_LFN
adrevong	0:8b2a15992487	1378	static
adrevong	0:8b2a15992487	1379	void gen_numname (
adrevong	0:8b2a15992487	1380	BYTE* dst, /* Pointer to the buffer to store numbered SFN */
adrevong	0:8b2a15992487	1381	const BYTE* src, /* Pointer to SFN */
adrevong	0:8b2a15992487	1382	const WCHAR* lfn, /* Pointer to LFN */
adrevong	0:8b2a15992487	1383	UINT seq /* Sequence number */
adrevong	0:8b2a15992487	1384	)
adrevong	0:8b2a15992487	1385	{
adrevong	0:8b2a15992487	1386	BYTE ns[8], c;
adrevong	0:8b2a15992487	1387	UINT i, j;
adrevong	0:8b2a15992487	1388	WCHAR wc;
adrevong	0:8b2a15992487	1389	DWORD sr;
adrevong	0:8b2a15992487	1390
adrevong	0:8b2a15992487	1391
adrevong	0:8b2a15992487	1392	mem_cpy(dst, src, 11);
adrevong	0:8b2a15992487	1393
adrevong	0:8b2a15992487	1394	if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
adrevong	0:8b2a15992487	1395	sr = seq;
adrevong	0:8b2a15992487	1396	while (lfn) { / Create a CRC */
adrevong	0:8b2a15992487	1397	wc = *lfn++;
adrevong	0:8b2a15992487	1398	for (i = 0; i < 16; i++) {
adrevong	0:8b2a15992487	1399	sr = (sr << 1) + (wc & 1);
adrevong	0:8b2a15992487	1400	wc >>= 1;
adrevong	0:8b2a15992487	1401	if (sr & 0x10000) sr ^= 0x11021;
adrevong	0:8b2a15992487	1402	}
adrevong	0:8b2a15992487	1403	}
adrevong	0:8b2a15992487	1404	seq = (UINT)sr;
adrevong	0:8b2a15992487	1405	}
adrevong	0:8b2a15992487	1406
adrevong	0:8b2a15992487	1407	/* itoa (hexdecimal) */
adrevong	0:8b2a15992487	1408	i = 7;
adrevong	0:8b2a15992487	1409	do {
adrevong	0:8b2a15992487	1410	c = (seq % 16) + '0';
adrevong	0:8b2a15992487	1411	if (c > '9') c += 7;
adrevong	0:8b2a15992487	1412	ns[i--] = c;
adrevong	0:8b2a15992487	1413	seq /= 16;
adrevong	0:8b2a15992487	1414	} while (seq);
adrevong	0:8b2a15992487	1415	ns[i] = '~';
adrevong	0:8b2a15992487	1416
adrevong	0:8b2a15992487	1417	/* Append the number */
adrevong	0:8b2a15992487	1418	for (j = 0; j < i && dst[j] != ' '; j++) {
adrevong	0:8b2a15992487	1419	if (IsDBCS1(dst[j])) {
adrevong	0:8b2a15992487	1420	if (j == i - 1) break;
adrevong	0:8b2a15992487	1421	j++;
adrevong	0:8b2a15992487	1422	}
adrevong	0:8b2a15992487	1423	}
adrevong	0:8b2a15992487	1424	do {
adrevong	0:8b2a15992487	1425	dst[j++] = (i < 8) ? ns[i++] : ' ';
adrevong	0:8b2a15992487	1426	} while (j < 8);
adrevong	0:8b2a15992487	1427	}
adrevong	0:8b2a15992487	1428	#endif
adrevong	0:8b2a15992487	1429
adrevong	0:8b2a15992487	1430
adrevong	0:8b2a15992487	1431
adrevong	0:8b2a15992487	1432
adrevong	0:8b2a15992487	1433	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1434	/* Calculate checksum of an SFN entry */
adrevong	0:8b2a15992487	1435	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1436	#if _USE_LFN
adrevong	0:8b2a15992487	1437	static
adrevong	0:8b2a15992487	1438	BYTE sum_sfn (
adrevong	0:8b2a15992487	1439	const BYTE* dir /* Pointer to the SFN entry */
adrevong	0:8b2a15992487	1440	)
adrevong	0:8b2a15992487	1441	{
adrevong	0:8b2a15992487	1442	BYTE sum = 0;
adrevong	0:8b2a15992487	1443	UINT n = 11;
adrevong	0:8b2a15992487	1444
adrevong	0:8b2a15992487	1445	do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
adrevong	0:8b2a15992487	1446	return sum;
adrevong	0:8b2a15992487	1447	}
adrevong	0:8b2a15992487	1448	#endif
adrevong	0:8b2a15992487	1449
adrevong	0:8b2a15992487	1450
adrevong	0:8b2a15992487	1451
adrevong	0:8b2a15992487	1452
adrevong	0:8b2a15992487	1453	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1454	/* Directory handling - Find an object in the directory */
adrevong	0:8b2a15992487	1455	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1456
adrevong	0:8b2a15992487	1457	static
adrevong	0:8b2a15992487	1458	FRESULT dir_find ( /* FR_OK(0):succeeded, !=0:error */
adrevong	0:8b2a15992487	1459	FATFS_DIR* dp /* Pointer to the directory object linked to the file name */
adrevong	0:8b2a15992487	1460	)
adrevong	0:8b2a15992487	1461	{
adrevong	0:8b2a15992487	1462	FRESULT res;
adrevong	0:8b2a15992487	1463	BYTE c, *dir;
adrevong	0:8b2a15992487	1464	#if _USE_LFN
adrevong	0:8b2a15992487	1465	BYTE a, ord, sum;
adrevong	0:8b2a15992487	1466	#endif
adrevong	0:8b2a15992487	1467
adrevong	0:8b2a15992487	1468	res = dir_sdi(dp, 0); /* Rewind directory object */
adrevong	0:8b2a15992487	1469	if (res != FR_OK) return res;
adrevong	0:8b2a15992487	1470
adrevong	0:8b2a15992487	1471	#if _USE_LFN
adrevong	0:8b2a15992487	1472	ord = sum = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
adrevong	0:8b2a15992487	1473	#endif
adrevong	0:8b2a15992487	1474	do {
adrevong	0:8b2a15992487	1475	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1476	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1477	dir = dp->dir; /* Ptr to the directory entry of current index */
adrevong	0:8b2a15992487	1478	c = dir[DIR_Name];
adrevong	0:8b2a15992487	1479	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
adrevong	0:8b2a15992487	1480	#if _USE_LFN /* LFN configuration */
adrevong	0:8b2a15992487	1481	a = dir[DIR_Attr] & AM_MASK;
adrevong	0:8b2a15992487	1482	if (c == DDEM \|\| ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
adrevong	0:8b2a15992487	1483	ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
adrevong	0:8b2a15992487	1484	} else {
adrevong	0:8b2a15992487	1485	if (a == AM_LFN) { /* An LFN entry is found */
adrevong	0:8b2a15992487	1486	if (dp->lfn) {
adrevong	0:8b2a15992487	1487	if (c & LLEF) { /* Is it start of LFN sequence? */
adrevong	0:8b2a15992487	1488	sum = dir[LDIR_Chksum];
adrevong	0:8b2a15992487	1489	c &= ~LLEF; ord = c; /* LFN start order */
adrevong	0:8b2a15992487	1490	dp->lfn_idx = dp->index; /* Start index of LFN */
adrevong	0:8b2a15992487	1491	}
adrevong	0:8b2a15992487	1492	/* Check validity of the LFN entry and compare it with given name */
adrevong	0:8b2a15992487	1493	ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
adrevong	0:8b2a15992487	1494	}
adrevong	0:8b2a15992487	1495	} else { /* An SFN entry is found */
adrevong	0:8b2a15992487	1496	if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
adrevong	0:8b2a15992487	1497	if (!(dp->fn[NSFLAG] & NS_LOSS) && !mem_cmp(dir, dp->fn, 11)) break; /* SFN matched? */
adrevong	0:8b2a15992487	1498	ord = 0xFF; dp->lfn_idx = 0xFFFF; /* Reset LFN sequence */
adrevong	0:8b2a15992487	1499	}
adrevong	0:8b2a15992487	1500	}
adrevong	0:8b2a15992487	1501	#else /* Non LFN configuration */
adrevong	0:8b2a15992487	1502	if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dp->fn, 11)) /* Is it a valid entry? */
adrevong	0:8b2a15992487	1503	break;
adrevong	0:8b2a15992487	1504	#endif
adrevong	0:8b2a15992487	1505	res = dir_next(dp, 0); /* Next entry */
adrevong	0:8b2a15992487	1506	} while (res == FR_OK);
adrevong	0:8b2a15992487	1507
adrevong	0:8b2a15992487	1508	return res;
adrevong	0:8b2a15992487	1509	}
adrevong	0:8b2a15992487	1510
adrevong	0:8b2a15992487	1511
adrevong	0:8b2a15992487	1512
adrevong	0:8b2a15992487	1513
adrevong	0:8b2a15992487	1514	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1515	/* Read an object from the directory */
adrevong	0:8b2a15992487	1516	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1517	#if _FS_MINIMIZE <= 1 \|\| _USE_LABEL \|\| _FS_RPATH >= 2
adrevong	0:8b2a15992487	1518	static
adrevong	0:8b2a15992487	1519	FRESULT dir_read (
adrevong	0:8b2a15992487	1520	FATFS_DIR* dp, /* Pointer to the directory object */
adrevong	0:8b2a15992487	1521	int vol /* Filtered by 0:file/directory or 1:volume label */
adrevong	0:8b2a15992487	1522	)
adrevong	0:8b2a15992487	1523	{
adrevong	0:8b2a15992487	1524	FRESULT res;
adrevong	0:8b2a15992487	1525	BYTE a, c, *dir;
adrevong	0:8b2a15992487	1526	#if _USE_LFN
adrevong	0:8b2a15992487	1527	BYTE ord = 0xFF, sum = 0xFF;
adrevong	0:8b2a15992487	1528	#endif
adrevong	0:8b2a15992487	1529
adrevong	0:8b2a15992487	1530	res = FR_NO_FILE;
adrevong	0:8b2a15992487	1531	while (dp->sect) {
adrevong	0:8b2a15992487	1532	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1533	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1534	dir = dp->dir; /* Ptr to the directory entry of current index */
adrevong	0:8b2a15992487	1535	c = dir[DIR_Name];
adrevong	0:8b2a15992487	1536	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
adrevong	0:8b2a15992487	1537	a = dir[DIR_Attr] & AM_MASK;
adrevong	0:8b2a15992487	1538	#if _USE_LFN /* LFN configuration */
adrevong	0:8b2a15992487	1539	if (c == DDEM \|\| (!_FS_RPATH && c == '.') \|\| (int)((a & ~AM_ARC) == AM_VOL) != vol) { /* An entry without valid data */
adrevong	0:8b2a15992487	1540	ord = 0xFF;
adrevong	0:8b2a15992487	1541	} else {
adrevong	0:8b2a15992487	1542	if (a == AM_LFN) { /* An LFN entry is found */
adrevong	0:8b2a15992487	1543	if (c & LLEF) { /* Is it start of LFN sequence? */
adrevong	0:8b2a15992487	1544	sum = dir[LDIR_Chksum];
adrevong	0:8b2a15992487	1545	c &= ~LLEF; ord = c;
adrevong	0:8b2a15992487	1546	dp->lfn_idx = dp->index;
adrevong	0:8b2a15992487	1547	}
adrevong	0:8b2a15992487	1548	/* Check LFN validity and capture it */
adrevong	0:8b2a15992487	1549	ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dp->lfn, dir)) ? ord - 1 : 0xFF;
adrevong	0:8b2a15992487	1550	} else { /* An SFN entry is found */
adrevong	0:8b2a15992487	1551	if (ord \|\| sum != sum_sfn(dir)) /* Is there a valid LFN? */
adrevong	0:8b2a15992487	1552	dp->lfn_idx = 0xFFFF; /* It has no LFN. */
adrevong	0:8b2a15992487	1553	break;
adrevong	0:8b2a15992487	1554	}
adrevong	0:8b2a15992487	1555	}
adrevong	0:8b2a15992487	1556	#else /* Non LFN configuration */
adrevong	0:8b2a15992487	1557	if (c != DDEM && (_FS_RPATH \|\| c != '.') && a != AM_LFN && (int)((a & ~AM_ARC) == AM_VOL) == vol) /* Is it a valid entry? */
adrevong	0:8b2a15992487	1558	break;
adrevong	0:8b2a15992487	1559	#endif
adrevong	0:8b2a15992487	1560	res = dir_next(dp, 0); /* Next entry */
adrevong	0:8b2a15992487	1561	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1562	}
adrevong	0:8b2a15992487	1563
adrevong	0:8b2a15992487	1564	if (res != FR_OK) dp->sect = 0;
adrevong	0:8b2a15992487	1565
adrevong	0:8b2a15992487	1566	return res;
adrevong	0:8b2a15992487	1567	}
adrevong	0:8b2a15992487	1568	#endif /* _FS_MINIMIZE <= 1 \|\| _USE_LABEL \|\| _FS_RPATH >= 2 */
adrevong	0:8b2a15992487	1569
adrevong	0:8b2a15992487	1570
adrevong	0:8b2a15992487	1571
adrevong	0:8b2a15992487	1572
adrevong	0:8b2a15992487	1573	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1574	/* Register an object to the directory */
adrevong	0:8b2a15992487	1575	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1576	#if !_FS_READONLY
adrevong	0:8b2a15992487	1577	static
adrevong	0:8b2a15992487	1578	FRESULT dir_register ( /* FR_OK:succeeded, FR_DENIED:no free entry or too many SFN collision, FR_DISK_ERR:disk error */
adrevong	0:8b2a15992487	1579	FATFS_DIR* dp /* Target directory with object name to be created */
adrevong	0:8b2a15992487	1580	)
adrevong	0:8b2a15992487	1581	{
adrevong	0:8b2a15992487	1582	FRESULT res;
adrevong	0:8b2a15992487	1583	#if _USE_LFN /* LFN configuration */
adrevong	0:8b2a15992487	1584	UINT n, nent;
adrevong	0:8b2a15992487	1585	BYTE sn[12], *fn, sum;
adrevong	0:8b2a15992487	1586	WCHAR *lfn;
adrevong	0:8b2a15992487	1587
adrevong	0:8b2a15992487	1588
adrevong	0:8b2a15992487	1589	fn = dp->fn; lfn = dp->lfn;
adrevong	0:8b2a15992487	1590	mem_cpy(sn, fn, 12);
adrevong	0:8b2a15992487	1591
adrevong	0:8b2a15992487	1592	if (_FS_RPATH && (sn[NSFLAG] & NS_DOT)) /* Cannot create dot entry */
adrevong	0:8b2a15992487	1593	return FR_INVALID_NAME;
adrevong	0:8b2a15992487	1594
adrevong	0:8b2a15992487	1595	if (sn[NSFLAG] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
adrevong	0:8b2a15992487	1596	fn[NSFLAG] = 0; dp->lfn = 0; /* Find only SFN */
adrevong	0:8b2a15992487	1597	for (n = 1; n < 100; n++) {
adrevong	0:8b2a15992487	1598	gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
adrevong	0:8b2a15992487	1599	res = dir_find(dp); /* Check if the name collides with existing SFN */
adrevong	0:8b2a15992487	1600	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1601	}
adrevong	0:8b2a15992487	1602	if (n == 100) return FR_DENIED; /* Abort if too many collisions */
adrevong	0:8b2a15992487	1603	if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
adrevong	0:8b2a15992487	1604	fn[NSFLAG] = sn[NSFLAG]; dp->lfn = lfn;
adrevong	0:8b2a15992487	1605	}
adrevong	0:8b2a15992487	1606
adrevong	0:8b2a15992487	1607	if (sn[NSFLAG] & NS_LFN) { /* When LFN is to be created, allocate entries for an SFN + LFNs. */
adrevong	0:8b2a15992487	1608	for (n = 0; lfn[n]; n++) ;
adrevong	0:8b2a15992487	1609	nent = (n + 25) / 13;
adrevong	0:8b2a15992487	1610	} else { /* Otherwise allocate an entry for an SFN */
adrevong	0:8b2a15992487	1611	nent = 1;
adrevong	0:8b2a15992487	1612	}
adrevong	0:8b2a15992487	1613	res = dir_alloc(dp, nent); /* Allocate entries */
adrevong	0:8b2a15992487	1614
adrevong	0:8b2a15992487	1615	if (res == FR_OK && --nent) { /* Set LFN entry if needed */
adrevong	0:8b2a15992487	1616	res = dir_sdi(dp, dp->index - nent);
adrevong	0:8b2a15992487	1617	if (res == FR_OK) {
adrevong	0:8b2a15992487	1618	sum = sum_sfn(dp->fn); /* Checksum value of the SFN tied to the LFN */
adrevong	0:8b2a15992487	1619	do { /* Store LFN entries in bottom first */
adrevong	0:8b2a15992487	1620	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1621	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1622	fit_lfn(dp->lfn, dp->dir, (BYTE)nent, sum);
adrevong	0:8b2a15992487	1623	dp->fs->wflag = 1;
adrevong	0:8b2a15992487	1624	res = dir_next(dp, 0); /* Next entry */
adrevong	0:8b2a15992487	1625	} while (res == FR_OK && --nent);
adrevong	0:8b2a15992487	1626	}
adrevong	0:8b2a15992487	1627	}
adrevong	0:8b2a15992487	1628	#else /* Non LFN configuration */
adrevong	0:8b2a15992487	1629	res = dir_alloc(dp, 1); /* Allocate an entry for SFN */
adrevong	0:8b2a15992487	1630	#endif
adrevong	0:8b2a15992487	1631
adrevong	0:8b2a15992487	1632	if (res == FR_OK) { /* Set SFN entry */
adrevong	0:8b2a15992487	1633	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1634	if (res == FR_OK) {
adrevong	0:8b2a15992487	1635	mem_set(dp->dir, 0, SZ_DIRE); /* Clean the entry */
adrevong	0:8b2a15992487	1636	mem_cpy(dp->dir, dp->fn, 11); /* Put SFN */
adrevong	0:8b2a15992487	1637	#if _USE_LFN
adrevong	0:8b2a15992487	1638	dp->dir[DIR_NTres] = dp->fn[NSFLAG] & (NS_BODY \| NS_EXT); /* Put NT flag */
adrevong	0:8b2a15992487	1639	#endif
adrevong	0:8b2a15992487	1640	dp->fs->wflag = 1;
adrevong	0:8b2a15992487	1641	}
adrevong	0:8b2a15992487	1642	}
adrevong	0:8b2a15992487	1643
adrevong	0:8b2a15992487	1644	return res;
adrevong	0:8b2a15992487	1645	}
adrevong	0:8b2a15992487	1646	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	1647
adrevong	0:8b2a15992487	1648
adrevong	0:8b2a15992487	1649
adrevong	0:8b2a15992487	1650
adrevong	0:8b2a15992487	1651	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1652	/* Remove an object from the directory */
adrevong	0:8b2a15992487	1653	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1654	#if !_FS_READONLY && !_FS_MINIMIZE
adrevong	0:8b2a15992487	1655	static
adrevong	0:8b2a15992487	1656	FRESULT dir_remove ( /* FR_OK:Succeeded, FR_DISK_ERR:A disk error */
adrevong	0:8b2a15992487	1657	FATFS_DIR* dp /* Directory object pointing the entry to be removed */
adrevong	0:8b2a15992487	1658	)
adrevong	0:8b2a15992487	1659	{
adrevong	0:8b2a15992487	1660	FRESULT res;
adrevong	0:8b2a15992487	1661	#if _USE_LFN /* LFN configuration */
adrevong	0:8b2a15992487	1662	UINT i;
adrevong	0:8b2a15992487	1663
adrevong	0:8b2a15992487	1664	i = dp->index; /* SFN index */
adrevong	0:8b2a15992487	1665	res = dir_sdi(dp, (dp->lfn_idx == 0xFFFF) ? i : dp->lfn_idx); /* Goto the SFN or top of the LFN entries */
adrevong	0:8b2a15992487	1666	if (res == FR_OK) {
adrevong	0:8b2a15992487	1667	do {
adrevong	0:8b2a15992487	1668	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1669	if (res != FR_OK) break;
adrevong	0:8b2a15992487	1670	mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
adrevong	0:8b2a15992487	1671	*dp->dir = DDEM;
adrevong	0:8b2a15992487	1672	dp->fs->wflag = 1;
adrevong	0:8b2a15992487	1673	if (dp->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
adrevong	0:8b2a15992487	1674	res = dir_next(dp, 0); /* Next entry */
adrevong	0:8b2a15992487	1675	} while (res == FR_OK);
adrevong	0:8b2a15992487	1676	if (res == FR_NO_FILE) res = FR_INT_ERR;
adrevong	0:8b2a15992487	1677	}
adrevong	0:8b2a15992487	1678
adrevong	0:8b2a15992487	1679	#else /* Non LFN configuration */
adrevong	0:8b2a15992487	1680	res = dir_sdi(dp, dp->index);
adrevong	0:8b2a15992487	1681	if (res == FR_OK) {
adrevong	0:8b2a15992487	1682	res = move_window(dp->fs, dp->sect);
adrevong	0:8b2a15992487	1683	if (res == FR_OK) {
adrevong	0:8b2a15992487	1684	mem_set(dp->dir, 0, SZ_DIRE); /* Clear and mark the entry "deleted" */
adrevong	0:8b2a15992487	1685	*dp->dir = DDEM;
adrevong	0:8b2a15992487	1686	dp->fs->wflag = 1;
adrevong	0:8b2a15992487	1687	}
adrevong	0:8b2a15992487	1688	}
adrevong	0:8b2a15992487	1689	#endif
adrevong	0:8b2a15992487	1690
adrevong	0:8b2a15992487	1691	return res;
adrevong	0:8b2a15992487	1692	}
adrevong	0:8b2a15992487	1693	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	1694
adrevong	0:8b2a15992487	1695
adrevong	0:8b2a15992487	1696
adrevong	0:8b2a15992487	1697
adrevong	0:8b2a15992487	1698	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1699	/* Get file information from directory entry */
adrevong	0:8b2a15992487	1700	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1701	#if _FS_MINIMIZE <= 1 \|\| _FS_RPATH >= 2
adrevong	0:8b2a15992487	1702	static
adrevong	0:8b2a15992487	1703	void get_fileinfo ( /* No return code */
adrevong	0:8b2a15992487	1704	FATFS_DIR* dp, /* Pointer to the directory object */
adrevong	0:8b2a15992487	1705	FILINFO* fno /* Pointer to the file information to be filled */
adrevong	0:8b2a15992487	1706	)
adrevong	0:8b2a15992487	1707	{
adrevong	0:8b2a15992487	1708	UINT i;
adrevong	0:8b2a15992487	1709	TCHAR *p, c;
adrevong	0:8b2a15992487	1710	BYTE *dir;
adrevong	0:8b2a15992487	1711	#if _USE_LFN
adrevong	0:8b2a15992487	1712	WCHAR w, *lfn;
adrevong	0:8b2a15992487	1713	#endif
adrevong	0:8b2a15992487	1714
adrevong	0:8b2a15992487	1715	p = fno->fname;
adrevong	0:8b2a15992487	1716	if (dp->sect) { /* Get SFN */
adrevong	0:8b2a15992487	1717	dir = dp->dir;
adrevong	0:8b2a15992487	1718	i = 0;
adrevong	0:8b2a15992487	1719	while (i < 11) { /* Copy name body and extension */
adrevong	0:8b2a15992487	1720	c = (TCHAR)dir[i++];
adrevong	0:8b2a15992487	1721	if (c == ' ') continue; /* Skip padding spaces */
adrevong	0:8b2a15992487	1722	if (c == RDDEM) c = (TCHAR)DDEM; /* Restore replaced DDEM character */
adrevong	0:8b2a15992487	1723	if (i == 9) p++ = '.'; / Insert a . if extension is exist */
adrevong	0:8b2a15992487	1724	#if _USE_LFN
adrevong	0:8b2a15992487	1725	if (IsUpper(c) && (dir[DIR_NTres] & (i >= 9 ? NS_EXT : NS_BODY)))
adrevong	0:8b2a15992487	1726	c += 0x20; /* To lower */
adrevong	0:8b2a15992487	1727	#if _LFN_UNICODE
adrevong	0:8b2a15992487	1728	if (IsDBCS1(c) && i != 8 && i != 11 && IsDBCS2(dir[i]))
adrevong	0:8b2a15992487	1729	c = c << 8 \| dir[i++];
adrevong	0:8b2a15992487	1730	c = ff_convert(c, 1); /* OEM -> Unicode */
adrevong	0:8b2a15992487	1731	if (!c) c = '?';
adrevong	0:8b2a15992487	1732	#endif
adrevong	0:8b2a15992487	1733	#endif
adrevong	0:8b2a15992487	1734	*p++ = c;
adrevong	0:8b2a15992487	1735	}
adrevong	0:8b2a15992487	1736	fno->fattrib = dir[DIR_Attr]; /* Attribute */
adrevong	0:8b2a15992487	1737	fno->fsize = LD_DWORD(dir + DIR_FileSize); /* Size */
adrevong	0:8b2a15992487	1738	fno->fdate = LD_WORD(dir + DIR_WrtDate); /* Date */
adrevong	0:8b2a15992487	1739	fno->ftime = LD_WORD(dir + DIR_WrtTime); /* Time */
adrevong	0:8b2a15992487	1740	}
adrevong	0:8b2a15992487	1741	p = 0; / Terminate SFN string by a \0 */
adrevong	0:8b2a15992487	1742
adrevong	0:8b2a15992487	1743	#if _USE_LFN
adrevong	0:8b2a15992487	1744	if (fno->lfname) {
adrevong	0:8b2a15992487	1745	i = 0; p = fno->lfname;
adrevong	0:8b2a15992487	1746	if (dp->sect && fno->lfsize && dp->lfn_idx != 0xFFFF) { /* Get LFN if available */
adrevong	0:8b2a15992487	1747	lfn = dp->lfn;
adrevong	0:8b2a15992487	1748	while ((w = lfn++) != 0) { / Get an LFN character */
adrevong	0:8b2a15992487	1749	#if !_LFN_UNICODE
adrevong	0:8b2a15992487	1750	w = ff_convert(w, 0); /* Unicode -> OEM */
adrevong	0:8b2a15992487	1751	if (!w) { i = 0; break; } /* No LFN if it could not be converted */
adrevong	0:8b2a15992487	1752	if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC (always false on SBCS cfg) */
adrevong	0:8b2a15992487	1753	p[i++] = (TCHAR)(w >> 8);
adrevong	0:8b2a15992487	1754	#endif
adrevong	0:8b2a15992487	1755	if (i >= fno->lfsize - 1) { i = 0; break; } /* No LFN if buffer overflow */
adrevong	0:8b2a15992487	1756	p[i++] = (TCHAR)w;
adrevong	0:8b2a15992487	1757	}
adrevong	0:8b2a15992487	1758	}
adrevong	0:8b2a15992487	1759	p[i] = 0; /* Terminate LFN string by a \0 */
adrevong	0:8b2a15992487	1760	}
adrevong	0:8b2a15992487	1761	#endif
adrevong	0:8b2a15992487	1762	}
adrevong	0:8b2a15992487	1763	#endif /* _FS_MINIMIZE <= 1 \|\| _FS_RPATH >= 2 */
adrevong	0:8b2a15992487	1764
adrevong	0:8b2a15992487	1765
adrevong	0:8b2a15992487	1766
adrevong	0:8b2a15992487	1767
adrevong	0:8b2a15992487	1768	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1769	/* Pattern matching */
adrevong	0:8b2a15992487	1770	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1771	#if _USE_FIND && _FS_MINIMIZE <= 1
adrevong	0:8b2a15992487	1772	static
adrevong	0:8b2a15992487	1773	WCHAR get_achar ( /* Get a character and advances ptr 1 or 2 */
adrevong	0:8b2a15992487	1774	const TCHAR** ptr /* Pointer to pointer to the SBCS/DBCS/Unicode string */
adrevong	0:8b2a15992487	1775	)
adrevong	0:8b2a15992487	1776	{
adrevong	0:8b2a15992487	1777	WCHAR chr;
adrevong	0:8b2a15992487	1778
adrevong	0:8b2a15992487	1779	#if !_LFN_UNICODE
adrevong	0:8b2a15992487	1780	chr = (BYTE)(ptr)++; /* Get a byte */
adrevong	0:8b2a15992487	1781	if (IsLower(chr)) chr -= 0x20; /* To upper ASCII char */
adrevong	0:8b2a15992487	1782	if (IsDBCS1(chr) && IsDBCS2(*ptr)) / Get DBC 2nd byte if needed */
adrevong	0:8b2a15992487	1783	chr = chr << 8 \| (BYTE)(ptr)++;
adrevong	0:8b2a15992487	1784	#ifdef _EXCVT
adrevong	0:8b2a15992487	1785	if (chr >= 0x80) chr = ExCvt[chr - 0x80]; /* To upper SBCS extended char */
adrevong	0:8b2a15992487	1786	#endif
adrevong	0:8b2a15992487	1787	#else
adrevong	0:8b2a15992487	1788	chr = ff_wtoupper((ptr)++); /* Get a word and to upper */
adrevong	0:8b2a15992487	1789	#endif
adrevong	0:8b2a15992487	1790	return chr;
adrevong	0:8b2a15992487	1791	}
adrevong	0:8b2a15992487	1792
adrevong	0:8b2a15992487	1793
adrevong	0:8b2a15992487	1794	static
adrevong	0:8b2a15992487	1795	int pattern_matching ( /* 0:mismatched, 1:matched */
adrevong	0:8b2a15992487	1796	const TCHAR* pat, /* Matching pattern */
adrevong	0:8b2a15992487	1797	const TCHAR* nam, /* String to be tested */
adrevong	0:8b2a15992487	1798	int skip, /* Number of pre-skip chars (number of ?s) */
adrevong	0:8b2a15992487	1799	int inf /* Infinite search (* specified) */
adrevong	0:8b2a15992487	1800	)
adrevong	0:8b2a15992487	1801	{
adrevong	0:8b2a15992487	1802	const TCHAR pp, np;
adrevong	0:8b2a15992487	1803	WCHAR pc, nc;
adrevong	0:8b2a15992487	1804	int nm, nx;
adrevong	0:8b2a15992487	1805
adrevong	0:8b2a15992487	1806
adrevong	0:8b2a15992487	1807	while (skip--) { /* Pre-skip name chars */
adrevong	0:8b2a15992487	1808	if (!get_achar(&nam)) return 0; /* Branch mismatched if less name chars */
adrevong	0:8b2a15992487	1809	}
adrevong	0:8b2a15992487	1810	if (!pat && inf) return 1; / (short circuit) */
adrevong	0:8b2a15992487	1811
adrevong	0:8b2a15992487	1812	do {
adrevong	0:8b2a15992487	1813	pp = pat; np = nam; /* Top of pattern and name to match */
adrevong	0:8b2a15992487	1814	for (;;) {
adrevong	0:8b2a15992487	1815	if (pp == '?' \|\| pp == '') { / Wildcard? */
adrevong	0:8b2a15992487	1816	nm = nx = 0;
adrevong	0:8b2a15992487	1817	do { /* Analyze the wildcard chars */
adrevong	0:8b2a15992487	1818	if (*pp++ == '?') nm++; else nx = 1;
adrevong	0:8b2a15992487	1819	} while (pp == '?' \|\| pp == '*');
adrevong	0:8b2a15992487	1820	if (pattern_matching(pp, np, nm, nx)) return 1; /* Test new branch (recurs upto number of wildcard blocks in the pattern) */
adrevong	0:8b2a15992487	1821	nc = np; break; / Branch mismatched */
adrevong	0:8b2a15992487	1822	}
adrevong	0:8b2a15992487	1823	pc = get_achar(&pp); /* Get a pattern char */
adrevong	0:8b2a15992487	1824	nc = get_achar(&np); /* Get a name char */
adrevong	0:8b2a15992487	1825	if (pc != nc) break; /* Branch mismatched? */
adrevong	0:8b2a15992487	1826	if (!pc) return 1; /* Branch matched? (matched at end of both strings) */
adrevong	0:8b2a15992487	1827	}
adrevong	0:8b2a15992487	1828	get_achar(&nam); /* nam++ */
adrevong	0:8b2a15992487	1829	} while (inf && nc); /* Retry until end of name if infinite search is specified */
adrevong	0:8b2a15992487	1830
adrevong	0:8b2a15992487	1831	return 0;
adrevong	0:8b2a15992487	1832	}
adrevong	0:8b2a15992487	1833	#endif /* _USE_FIND && _FS_MINIMIZE <= 1 */
adrevong	0:8b2a15992487	1834
adrevong	0:8b2a15992487	1835
adrevong	0:8b2a15992487	1836
adrevong	0:8b2a15992487	1837
adrevong	0:8b2a15992487	1838	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1839	/* Pick a top segment and create the object name in directory form */
adrevong	0:8b2a15992487	1840	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	1841
adrevong	0:8b2a15992487	1842	static
adrevong	0:8b2a15992487	1843	FRESULT create_name ( /* FR_OK: successful, FR_INVALID_NAME: could not create */
adrevong	0:8b2a15992487	1844	FATFS_DIR* dp, /* Pointer to the directory object */
adrevong	0:8b2a15992487	1845	const TCHAR** path /* Pointer to pointer to the segment in the path string */
adrevong	0:8b2a15992487	1846	)
adrevong	0:8b2a15992487	1847	{
adrevong	0:8b2a15992487	1848	#if _USE_LFN /* LFN configuration */
adrevong	0:8b2a15992487	1849	BYTE b, cf;
adrevong	0:8b2a15992487	1850	WCHAR w, *lfn;
adrevong	0:8b2a15992487	1851	UINT i, ni, si, di;
adrevong	0:8b2a15992487	1852	const TCHAR *p;
adrevong	0:8b2a15992487	1853
adrevong	0:8b2a15992487	1854	/* Create LFN in Unicode */
adrevong	0:8b2a15992487	1855	for (p = path; p == '/' \|\| p == '\\'; p++) ; / Strip duplicated separator */
adrevong	0:8b2a15992487	1856	lfn = dp->lfn;
adrevong	0:8b2a15992487	1857	si = di = 0;
adrevong	0:8b2a15992487	1858	for (;;) {
adrevong	0:8b2a15992487	1859	w = p[si++]; /* Get a character */
adrevong	0:8b2a15992487	1860	if (w < ' ' \|\| w == '/' \|\| w == '\\') break; /* Break on end of segment */
adrevong	0:8b2a15992487	1861	if (di >= _MAX_LFN) /* Reject too long name */
adrevong	0:8b2a15992487	1862	return FR_INVALID_NAME;
adrevong	0:8b2a15992487	1863	#if !_LFN_UNICODE
adrevong	0:8b2a15992487	1864	w &= 0xFF;
adrevong	0:8b2a15992487	1865	if (IsDBCS1(w)) { /* Check if it is a DBC 1st byte (always false on SBCS cfg) */
adrevong	0:8b2a15992487	1866	b = (BYTE)p[si++]; /* Get 2nd byte */
adrevong	0:8b2a15992487	1867	w = (w << 8) + b; /* Create a DBC */
adrevong	0:8b2a15992487	1868	if (!IsDBCS2(b))
adrevong	0:8b2a15992487	1869	return FR_INVALID_NAME; /* Reject invalid sequence */
adrevong	0:8b2a15992487	1870	}
adrevong	0:8b2a15992487	1871	w = ff_convert(w, 1); /* Convert ANSI/OEM to Unicode */
adrevong	0:8b2a15992487	1872	if (!w) return FR_INVALID_NAME; /* Reject invalid code */
adrevong	0:8b2a15992487	1873	#endif
adrevong	0:8b2a15992487	1874	if (w < 0x80 && chk_chr("\":<>\?\|\x7F", w)) / Reject illegal characters for LFN */
adrevong	0:8b2a15992487	1875	return FR_INVALID_NAME;
adrevong	0:8b2a15992487	1876	lfn[di++] = w; /* Store the Unicode character */
adrevong	0:8b2a15992487	1877	}
adrevong	0:8b2a15992487	1878	path = &p[si]; / Return pointer to the next segment */
adrevong	0:8b2a15992487	1879	cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
adrevong	0:8b2a15992487	1880	#if _FS_RPATH
adrevong	0:8b2a15992487	1881	if ((di == 1 && lfn[di - 1] == '.') \|\|
adrevong	0:8b2a15992487	1882	(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) { /* Is this segment a dot entry? */
adrevong	0:8b2a15992487	1883	lfn[di] = 0;
adrevong	0:8b2a15992487	1884	for (i = 0; i < 11; i++) /* Create dot name for SFN entry */
adrevong	0:8b2a15992487	1885	dp->fn[i] = (i < di) ? '.' : ' ';
adrevong	0:8b2a15992487	1886	dp->fn[i] = cf \| NS_DOT; /* This is a dot entry */
adrevong	0:8b2a15992487	1887	return FR_OK;
adrevong	0:8b2a15992487	1888	}
adrevong	0:8b2a15992487	1889	#endif
adrevong	0:8b2a15992487	1890	while (di) { /* Snip off trailing spaces and dots if exist */
adrevong	0:8b2a15992487	1891	w = lfn[di - 1];
adrevong	0:8b2a15992487	1892	if (w != ' ' && w != '.') break;
adrevong	0:8b2a15992487	1893	di--;
adrevong	0:8b2a15992487	1894	}
adrevong	0:8b2a15992487	1895	if (!di) return FR_INVALID_NAME; /* Reject nul string */
adrevong	0:8b2a15992487	1896	lfn[di] = 0; /* LFN is created */
adrevong	0:8b2a15992487	1897
adrevong	0:8b2a15992487	1898	/* Create SFN in directory form */
adrevong	0:8b2a15992487	1899	mem_set(dp->fn, ' ', 11);
adrevong	0:8b2a15992487	1900	for (si = 0; lfn[si] == ' ' \|\| lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
adrevong	0:8b2a15992487	1901	if (si) cf \|= NS_LOSS \| NS_LFN;
adrevong	0:8b2a15992487	1902	while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
adrevong	0:8b2a15992487	1903
adrevong	0:8b2a15992487	1904	b = i = 0; ni = 8;
adrevong	0:8b2a15992487	1905	for (;;) {
adrevong	0:8b2a15992487	1906	w = lfn[si++]; /* Get an LFN character */
adrevong	0:8b2a15992487	1907	if (!w) break; /* Break on end of the LFN */
adrevong	0:8b2a15992487	1908	if (w == ' ' \|\| (w == '.' && si != di)) { /* Remove spaces and dots */
adrevong	0:8b2a15992487	1909	cf \|= NS_LOSS \| NS_LFN; continue;
adrevong	0:8b2a15992487	1910	}
adrevong	0:8b2a15992487	1911
adrevong	0:8b2a15992487	1912	if (i >= ni \|\| si == di) { /* Extension or end of SFN */
adrevong	0:8b2a15992487	1913	if (ni == 11) { /* Long extension */
adrevong	0:8b2a15992487	1914	cf \|= NS_LOSS \| NS_LFN; break;
adrevong	0:8b2a15992487	1915	}
adrevong	0:8b2a15992487	1916	if (si != di) cf \|= NS_LOSS \| NS_LFN; /* Out of 8.3 format */
adrevong	0:8b2a15992487	1917	if (si > di) break; /* No extension */
adrevong	0:8b2a15992487	1918	si = di; i = 8; ni = 11; /* Enter extension section */
adrevong	0:8b2a15992487	1919	b <<= 2; continue;
adrevong	0:8b2a15992487	1920	}
adrevong	0:8b2a15992487	1921
adrevong	0:8b2a15992487	1922	if (w >= 0x80) { /* Non ASCII character */
adrevong	0:8b2a15992487	1923	#ifdef _EXCVT
adrevong	0:8b2a15992487	1924	w = ff_convert(w, 0); /* Unicode -> OEM code */
adrevong	0:8b2a15992487	1925	if (w) w = ExCvt[w - 0x80]; /* Convert extended character to upper (SBCS) */
adrevong	0:8b2a15992487	1926	#else
adrevong	0:8b2a15992487	1927	w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
adrevong	0:8b2a15992487	1928	#endif
adrevong	0:8b2a15992487	1929	cf \|= NS_LFN; /* Force create LFN entry */
adrevong	0:8b2a15992487	1930	}
adrevong	0:8b2a15992487	1931
adrevong	0:8b2a15992487	1932	if (_DF1S && w >= 0x100) { /* Is this DBC? (always false at SBCS cfg) */
adrevong	0:8b2a15992487	1933	if (i >= ni - 1) {
adrevong	0:8b2a15992487	1934	cf \|= NS_LOSS \| NS_LFN; i = ni; continue;
adrevong	0:8b2a15992487	1935	}
adrevong	0:8b2a15992487	1936	dp->fn[i++] = (BYTE)(w >> 8);
adrevong	0:8b2a15992487	1937	} else { /* SBC */
adrevong	0:8b2a15992487	1938	if (!w \|\| chk_chr("+,;=[]", w)) { /* Replace illegal characters for SFN */
adrevong	0:8b2a15992487	1939	w = '_'; cf \|= NS_LOSS \| NS_LFN;/* Lossy conversion */
adrevong	0:8b2a15992487	1940	} else {
adrevong	0:8b2a15992487	1941	if (IsUpper(w)) { /* ASCII large capital */
adrevong	0:8b2a15992487	1942	b \|= 2;
adrevong	0:8b2a15992487	1943	} else {
adrevong	0:8b2a15992487	1944	if (IsLower(w)) { /* ASCII small capital */
adrevong	0:8b2a15992487	1945	b \|= 1; w -= 0x20;
adrevong	0:8b2a15992487	1946	}
adrevong	0:8b2a15992487	1947	}
adrevong	0:8b2a15992487	1948	}
adrevong	0:8b2a15992487	1949	}
adrevong	0:8b2a15992487	1950	dp->fn[i++] = (BYTE)w;
adrevong	0:8b2a15992487	1951	}
adrevong	0:8b2a15992487	1952
adrevong	0:8b2a15992487	1953	if (dp->fn[0] == DDEM) dp->fn[0] = RDDEM; /* If the first character collides with DDEM, replace it with RDDEM */
adrevong	0:8b2a15992487	1954
adrevong	0:8b2a15992487	1955	if (ni == 8) b <<= 2;
adrevong	0:8b2a15992487	1956	if ((b & 0x0C) == 0x0C \|\| (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
adrevong	0:8b2a15992487	1957	cf \|= NS_LFN;
adrevong	0:8b2a15992487	1958	if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended character, NT flags are created */
adrevong	0:8b2a15992487	1959	if ((b & 0x03) == 0x01) cf \|= NS_EXT; /* NT flag (Extension has only small capital) */
adrevong	0:8b2a15992487	1960	if ((b & 0x0C) == 0x04) cf \|= NS_BODY; /* NT flag (Filename has only small capital) */
adrevong	0:8b2a15992487	1961	}
adrevong	0:8b2a15992487	1962
adrevong	0:8b2a15992487	1963	dp->fn[NSFLAG] = cf; /* SFN is created */
adrevong	0:8b2a15992487	1964
adrevong	0:8b2a15992487	1965	return FR_OK;
adrevong	0:8b2a15992487	1966
adrevong	0:8b2a15992487	1967
adrevong	0:8b2a15992487	1968	#else /* Non-LFN configuration */
adrevong	0:8b2a15992487	1969	BYTE b, c, d, *sfn;
adrevong	0:8b2a15992487	1970	UINT ni, si, i;
adrevong	0:8b2a15992487	1971	const char *p;
adrevong	0:8b2a15992487	1972
adrevong	0:8b2a15992487	1973	/* Create file name in directory form */
adrevong	0:8b2a15992487	1974	for (p = path; p == '/' \|\| p == '\\'; p++) ; / Skip duplicated separator */
adrevong	0:8b2a15992487	1975	sfn = dp->fn;
adrevong	0:8b2a15992487	1976	mem_set(sfn, ' ', 11);
adrevong	0:8b2a15992487	1977	si = i = b = 0; ni = 8;
adrevong	0:8b2a15992487	1978	#if _FS_RPATH
adrevong	0:8b2a15992487	1979	if (p[si] == '.') { /* Is this a dot entry? */
adrevong	0:8b2a15992487	1980	for (;;) {
adrevong	0:8b2a15992487	1981	c = (BYTE)p[si++];
adrevong	0:8b2a15992487	1982	if (c != '.' \|\| si >= 3) break;
adrevong	0:8b2a15992487	1983	sfn[i++] = c;
adrevong	0:8b2a15992487	1984	}
adrevong	0:8b2a15992487	1985	if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
adrevong	0:8b2a15992487	1986	path = &p[si]; / Return pointer to the next segment */
adrevong	0:8b2a15992487	1987	sfn[NSFLAG] = (c <= ' ') ? NS_LAST \| NS_DOT : NS_DOT; /* Set last segment flag if end of path */
adrevong	0:8b2a15992487	1988	return FR_OK;
adrevong	0:8b2a15992487	1989	}
adrevong	0:8b2a15992487	1990	#endif
adrevong	0:8b2a15992487	1991	for (;;) {
adrevong	0:8b2a15992487	1992	c = (BYTE)p[si++];
adrevong	0:8b2a15992487	1993	if (c <= ' ' \|\| c == '/' \|\| c == '\\') break; /* Break on end of segment */
adrevong	0:8b2a15992487	1994	if (c == '.' \|\| i >= ni) {
adrevong	0:8b2a15992487	1995	if (ni != 8 \|\| c != '.') return FR_INVALID_NAME;
adrevong	0:8b2a15992487	1996	i = 8; ni = 11;
adrevong	0:8b2a15992487	1997	b <<= 2; continue;
adrevong	0:8b2a15992487	1998	}
adrevong	0:8b2a15992487	1999	if (c >= 0x80) { /* Extended character? */
adrevong	0:8b2a15992487	2000	b \|= 3; /* Eliminate NT flag */
adrevong	0:8b2a15992487	2001	#ifdef _EXCVT
adrevong	0:8b2a15992487	2002	c = ExCvt[c - 0x80]; /* To upper extended characters (SBCS cfg) */
adrevong	0:8b2a15992487	2003	#else
adrevong	0:8b2a15992487	2004	#if !_DF1S
adrevong	0:8b2a15992487	2005	return FR_INVALID_NAME; /* Reject extended characters (ASCII cfg) */
adrevong	0:8b2a15992487	2006	#endif
adrevong	0:8b2a15992487	2007	#endif
adrevong	0:8b2a15992487	2008	}
adrevong	0:8b2a15992487	2009	if (IsDBCS1(c)) { /* Check if it is a DBC 1st byte (always false at SBCS cfg.) */
adrevong	0:8b2a15992487	2010	d = (BYTE)p[si++]; /* Get 2nd byte */
adrevong	0:8b2a15992487	2011	if (!IsDBCS2(d) \|\| i >= ni - 1) /* Reject invalid DBC */
adrevong	0:8b2a15992487	2012	return FR_INVALID_NAME;
adrevong	0:8b2a15992487	2013	sfn[i++] = c;
adrevong	0:8b2a15992487	2014	sfn[i++] = d;
adrevong	0:8b2a15992487	2015	} else { /* SBC */
adrevong	0:8b2a15992487	2016	if (chk_chr("\"+,:;<=>\?[]\|\x7F", c)) / Reject illegal chrs for SFN */
adrevong	0:8b2a15992487	2017	return FR_INVALID_NAME;
adrevong	0:8b2a15992487	2018	if (IsUpper(c)) { /* ASCII large capital? */
adrevong	0:8b2a15992487	2019	b \|= 2;
adrevong	0:8b2a15992487	2020	} else {
adrevong	0:8b2a15992487	2021	if (IsLower(c)) { /* ASCII small capital? */
adrevong	0:8b2a15992487	2022	b \|= 1; c -= 0x20;
adrevong	0:8b2a15992487	2023	}
adrevong	0:8b2a15992487	2024	}
adrevong	0:8b2a15992487	2025	sfn[i++] = c;
adrevong	0:8b2a15992487	2026	}
adrevong	0:8b2a15992487	2027	}
adrevong	0:8b2a15992487	2028	path = &p[si]; / Return pointer to the next segment */
adrevong	0:8b2a15992487	2029	c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
adrevong	0:8b2a15992487	2030
adrevong	0:8b2a15992487	2031	if (!i) return FR_INVALID_NAME; /* Reject nul string */
adrevong	0:8b2a15992487	2032	if (sfn[0] == DDEM) sfn[0] = RDDEM; /* When first character collides with DDEM, replace it with RDDEM */
adrevong	0:8b2a15992487	2033
adrevong	0:8b2a15992487	2034	if (ni == 8) b <<= 2;
adrevong	0:8b2a15992487	2035	if ((b & 0x03) == 0x01) c \|= NS_EXT; /* NT flag (Name extension has only small capital) */
adrevong	0:8b2a15992487	2036	if ((b & 0x0C) == 0x04) c \|= NS_BODY; /* NT flag (Name body has only small capital) */
adrevong	0:8b2a15992487	2037
adrevong	0:8b2a15992487	2038	sfn[NSFLAG] = c; /* Store NT flag, File name is created */
adrevong	0:8b2a15992487	2039
adrevong	0:8b2a15992487	2040	return FR_OK;
adrevong	0:8b2a15992487	2041	#endif
adrevong	0:8b2a15992487	2042	}
adrevong	0:8b2a15992487	2043
adrevong	0:8b2a15992487	2044
adrevong	0:8b2a15992487	2045
adrevong	0:8b2a15992487	2046
adrevong	0:8b2a15992487	2047	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2048	/* Follow a file path */
adrevong	0:8b2a15992487	2049	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2050
adrevong	0:8b2a15992487	2051	static
adrevong	0:8b2a15992487	2052	FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
adrevong	0:8b2a15992487	2053	FATFS_DIR* dp, /* Directory object to return last directory and found object */
adrevong	0:8b2a15992487	2054	const TCHAR* path /* Full-path string to find a file or directory */
adrevong	0:8b2a15992487	2055	)
adrevong	0:8b2a15992487	2056	{
adrevong	0:8b2a15992487	2057	FRESULT res;
adrevong	0:8b2a15992487	2058	BYTE *dir, ns;
adrevong	0:8b2a15992487	2059
adrevong	0:8b2a15992487	2060
adrevong	0:8b2a15992487	2061	#if _FS_RPATH
adrevong	0:8b2a15992487	2062	if (path == '/' \|\| path == '\\') { /* There is a heading separator */
adrevong	0:8b2a15992487	2063	path++; dp->sclust = 0; /* Strip it and start from the root directory */
adrevong	0:8b2a15992487	2064	} else { /* No heading separator */
adrevong	0:8b2a15992487	2065	dp->sclust = dp->fs->cdir; /* Start from the current directory */
adrevong	0:8b2a15992487	2066	}
adrevong	0:8b2a15992487	2067	#else
adrevong	0:8b2a15992487	2068	if (path == '/' \|\| path == '\\') /* Strip heading separator if exist */
adrevong	0:8b2a15992487	2069	path++;
adrevong	0:8b2a15992487	2070	dp->sclust = 0; /* Always start from the root directory */
adrevong	0:8b2a15992487	2071	#endif
adrevong	0:8b2a15992487	2072
adrevong	0:8b2a15992487	2073	if ((UINT)path < ' ') { / Null path name is the origin directory itself */
adrevong	0:8b2a15992487	2074	res = dir_sdi(dp, 0);
adrevong	0:8b2a15992487	2075	dp->dir = 0;
adrevong	0:8b2a15992487	2076	} else { /* Follow path */
adrevong	0:8b2a15992487	2077	for (;;) {
adrevong	0:8b2a15992487	2078	res = create_name(dp, &path); /* Get a segment name of the path */
adrevong	0:8b2a15992487	2079	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2080	res = dir_find(dp); /* Find an object with the sagment name */
adrevong	0:8b2a15992487	2081	ns = dp->fn[NSFLAG];
adrevong	0:8b2a15992487	2082	if (res != FR_OK) { /* Failed to find the object */
adrevong	0:8b2a15992487	2083	if (res == FR_NO_FILE) { /* Object is not found */
adrevong	0:8b2a15992487	2084	if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exist, */
adrevong	0:8b2a15992487	2085	dp->sclust = 0; dp->dir = 0; /* it is the root directory and stay there */
adrevong	0:8b2a15992487	2086	if (!(ns & NS_LAST)) continue; /* Continue to follow if not last segment */
adrevong	0:8b2a15992487	2087	res = FR_OK; /* Ended at the root directroy. Function completed. */
adrevong	0:8b2a15992487	2088	} else { /* Could not find the object */
adrevong	0:8b2a15992487	2089	if (!(ns & NS_LAST)) res = FR_NO_PATH; /* Adjust error code if not last segment */
adrevong	0:8b2a15992487	2090	}
adrevong	0:8b2a15992487	2091	}
adrevong	0:8b2a15992487	2092	break;
adrevong	0:8b2a15992487	2093	}
adrevong	0:8b2a15992487	2094	if (ns & NS_LAST) break; /* Last segment matched. Function completed. */
adrevong	0:8b2a15992487	2095	dir = dp->dir; /* Follow the sub-directory */
adrevong	0:8b2a15992487	2096	if (!(dir[DIR_Attr] & AM_DIR)) { /* It is not a sub-directory and cannot follow */
adrevong	0:8b2a15992487	2097	res = FR_NO_PATH; break;
adrevong	0:8b2a15992487	2098	}
adrevong	0:8b2a15992487	2099	dp->sclust = ld_clust(dp->fs, dir);
adrevong	0:8b2a15992487	2100	}
adrevong	0:8b2a15992487	2101	}
adrevong	0:8b2a15992487	2102
adrevong	0:8b2a15992487	2103	return res;
adrevong	0:8b2a15992487	2104	}
adrevong	0:8b2a15992487	2105
adrevong	0:8b2a15992487	2106
adrevong	0:8b2a15992487	2107
adrevong	0:8b2a15992487	2108
adrevong	0:8b2a15992487	2109	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2110	/* Get logical drive number from path name */
adrevong	0:8b2a15992487	2111	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2112
adrevong	0:8b2a15992487	2113	static
adrevong	0:8b2a15992487	2114	int get_ldnumber ( /* Returns logical drive number (-1:invalid drive) */
adrevong	0:8b2a15992487	2115	const TCHAR** path /* Pointer to pointer to the path name */
adrevong	0:8b2a15992487	2116	)
adrevong	0:8b2a15992487	2117	{
adrevong	0:8b2a15992487	2118	const TCHAR tp, tt;
adrevong	0:8b2a15992487	2119	UINT i;
adrevong	0:8b2a15992487	2120	int vol = -1;
adrevong	0:8b2a15992487	2121	#if _STR_VOLUME_ID /* Find string drive id */
adrevong	0:8b2a15992487	2122	static const char* const str[] = {_VOLUME_STRS};
adrevong	0:8b2a15992487	2123	const char *sp;
adrevong	0:8b2a15992487	2124	char c;
adrevong	0:8b2a15992487	2125	TCHAR tc;
adrevong	0:8b2a15992487	2126	#endif
adrevong	0:8b2a15992487	2127
adrevong	0:8b2a15992487	2128
adrevong	0:8b2a15992487	2129	if (path) { / If the pointer is not a null */
adrevong	0:8b2a15992487	2130	for (tt = path; (UINT)tt >= (_USE_LFN ? ' ' : '!') && tt != ':'; tt++) ; / Find ':' in the path */
adrevong	0:8b2a15992487	2131	if (tt == ':') { / If a ':' is exist in the path name */
adrevong	0:8b2a15992487	2132	tp = *path;
adrevong	0:8b2a15992487	2133	i = *tp++ - '0';
adrevong	0:8b2a15992487	2134	if (i < 10 && tp == tt) { /* Is there a numeric drive id? */
adrevong	0:8b2a15992487	2135	if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
adrevong	0:8b2a15992487	2136	vol = (int)i;
adrevong	0:8b2a15992487	2137	*path = ++tt;
adrevong	0:8b2a15992487	2138	}
adrevong	0:8b2a15992487	2139	}
adrevong	0:8b2a15992487	2140	#if _STR_VOLUME_ID
adrevong	0:8b2a15992487	2141	else { /* No numeric drive number, find string drive id */
adrevong	0:8b2a15992487	2142	i = 0; tt++;
adrevong	0:8b2a15992487	2143	do {
adrevong	0:8b2a15992487	2144	sp = str[i]; tp = *path;
adrevong	0:8b2a15992487	2145	do { /* Compare a string drive id with path name */
adrevong	0:8b2a15992487	2146	c = sp++; tc = tp++;
adrevong	0:8b2a15992487	2147	if (IsLower(tc)) tc -= 0x20;
adrevong	0:8b2a15992487	2148	} while (c && (TCHAR)c == tc);
adrevong	0:8b2a15992487	2149	} while ((c \|\| tp != tt) && ++i < _VOLUMES); /* Repeat for each id until pattern match */
adrevong	0:8b2a15992487	2150	if (i < _VOLUMES) { /* If a drive id is found, get the value and strip it */
adrevong	0:8b2a15992487	2151	vol = (int)i;
adrevong	0:8b2a15992487	2152	*path = tt;
adrevong	0:8b2a15992487	2153	}
adrevong	0:8b2a15992487	2154	}
adrevong	0:8b2a15992487	2155	#endif
adrevong	0:8b2a15992487	2156	return vol;
adrevong	0:8b2a15992487	2157	}
adrevong	0:8b2a15992487	2158	#if _FS_RPATH && _VOLUMES >= 2
adrevong	0:8b2a15992487	2159	vol = CurrVol; /* Current drive */
adrevong	0:8b2a15992487	2160	#else
adrevong	0:8b2a15992487	2161	vol = 0; /* Drive 0 */
adrevong	0:8b2a15992487	2162	#endif
adrevong	0:8b2a15992487	2163	}
adrevong	0:8b2a15992487	2164	return vol;
adrevong	0:8b2a15992487	2165	}
adrevong	0:8b2a15992487	2166
adrevong	0:8b2a15992487	2167
adrevong	0:8b2a15992487	2168
adrevong	0:8b2a15992487	2169
adrevong	0:8b2a15992487	2170	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2171	/* Load a sector and check if it is an FAT boot sector */
adrevong	0:8b2a15992487	2172	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2173
adrevong	0:8b2a15992487	2174	static
adrevong	0:8b2a15992487	2175	BYTE check_fs ( /* 0:Valid FAT-BS, 1:Valid BS but not FAT, 2:Not a BS, 3:Disk error */
adrevong	0:8b2a15992487	2176	FATFS* fs, /* File system object */
adrevong	0:8b2a15992487	2177	DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
adrevong	0:8b2a15992487	2178	)
adrevong	0:8b2a15992487	2179	{
adrevong	0:8b2a15992487	2180	fs->wflag = 0; fs->winsect = 0xFFFFFFFF; /* Invaidate window */
adrevong	0:8b2a15992487	2181	if (move_window(fs, sect) != FR_OK) /* Load boot record */
adrevong	0:8b2a15992487	2182	return 3;
adrevong	0:8b2a15992487	2183
adrevong	0:8b2a15992487	2184	if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check boot record signature (always placed at offset 510 even if the sector size is >512) */
adrevong	0:8b2a15992487	2185	return 2;
adrevong	0:8b2a15992487	2186
adrevong	0:8b2a15992487	2187	if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
adrevong	0:8b2a15992487	2188	return 0;
adrevong	0:8b2a15992487	2189	if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
adrevong	0:8b2a15992487	2190	return 0;
adrevong	0:8b2a15992487	2191
adrevong	0:8b2a15992487	2192	return 1;
adrevong	0:8b2a15992487	2193	}
adrevong	0:8b2a15992487	2194
adrevong	0:8b2a15992487	2195
adrevong	0:8b2a15992487	2196
adrevong	0:8b2a15992487	2197
adrevong	0:8b2a15992487	2198	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2199	/* Find logical drive and check if the volume is mounted */
adrevong	0:8b2a15992487	2200	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2201
adrevong	0:8b2a15992487	2202	static
adrevong	0:8b2a15992487	2203	FRESULT find_volume ( /* FR_OK(0): successful, !=0: any error occurred */
adrevong	0:8b2a15992487	2204	FATFS** rfs, /* Pointer to pointer to the found file system object */
adrevong	0:8b2a15992487	2205	const TCHAR** path, /* Pointer to pointer to the path name (drive number) */
adrevong	0:8b2a15992487	2206	BYTE wmode /* !=0: Check write protection for write access */
adrevong	0:8b2a15992487	2207	)
adrevong	0:8b2a15992487	2208	{
adrevong	0:8b2a15992487	2209	BYTE fmt, *pt;
adrevong	0:8b2a15992487	2210	int vol;
adrevong	0:8b2a15992487	2211	DSTATUS stat;
adrevong	0:8b2a15992487	2212	DWORD bsect, fasize, tsect, sysect, nclst, szbfat, br[4];
adrevong	0:8b2a15992487	2213	WORD nrsv;
adrevong	0:8b2a15992487	2214	FATFS *fs;
adrevong	0:8b2a15992487	2215	UINT i;
adrevong	0:8b2a15992487	2216
adrevong	0:8b2a15992487	2217
adrevong	0:8b2a15992487	2218	/* Get logical drive number from the path name */
adrevong	0:8b2a15992487	2219	*rfs = 0;
adrevong	0:8b2a15992487	2220	vol = get_ldnumber(path);
adrevong	0:8b2a15992487	2221	if (vol < 0) return FR_INVALID_DRIVE;
adrevong	0:8b2a15992487	2222
adrevong	0:8b2a15992487	2223	/* Check if the file system object is valid or not */
adrevong	0:8b2a15992487	2224	fs = FatFs[vol]; /* Get pointer to the file system object */
adrevong	0:8b2a15992487	2225	if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
adrevong	0:8b2a15992487	2226
adrevong	0:8b2a15992487	2227	ENTER_FF(fs); /* Lock the volume */
adrevong	0:8b2a15992487	2228	rfs = fs; / Return pointer to the file system object */
adrevong	0:8b2a15992487	2229
adrevong	0:8b2a15992487	2230	if (fs->fs_type) { /* If the volume has been mounted */
adrevong	0:8b2a15992487	2231	stat = disk_status(fs->drv);
adrevong	0:8b2a15992487	2232	if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized */
adrevong	0:8b2a15992487	2233	if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check write protection if needed */
adrevong	0:8b2a15992487	2234	return FR_WRITE_PROTECTED;
adrevong	0:8b2a15992487	2235	return FR_OK; /* The file system object is valid */
adrevong	0:8b2a15992487	2236	}
adrevong	0:8b2a15992487	2237	}
adrevong	0:8b2a15992487	2238
adrevong	0:8b2a15992487	2239	/* The file system object is not valid. */
adrevong	0:8b2a15992487	2240	/* Following code attempts to mount the volume. (analyze BPB and initialize the fs object) */
adrevong	0:8b2a15992487	2241
adrevong	0:8b2a15992487	2242	fs->fs_type = 0; /* Clear the file system object */
adrevong	0:8b2a15992487	2243	fs->drv = LD2PD(vol); /* Bind the logical drive and a physical drive */
adrevong	0:8b2a15992487	2244	stat = disk_initialize(fs->drv); /* Initialize the physical drive */
adrevong	0:8b2a15992487	2245	if (stat & STA_NOINIT) /* Check if the initialization succeeded */
adrevong	0:8b2a15992487	2246	return FR_NOT_READY; /* Failed to initialize due to no medium or hard error */
adrevong	0:8b2a15992487	2247	if (!_FS_READONLY && wmode && (stat & STA_PROTECT)) /* Check disk write protection if needed */
adrevong	0:8b2a15992487	2248	return FR_WRITE_PROTECTED;
adrevong	0:8b2a15992487	2249	#if _MAX_SS != _MIN_SS /* Get sector size (multiple sector size cfg only) */
adrevong	0:8b2a15992487	2250	if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
adrevong	0:8b2a15992487	2251	\|\| SS(fs) < _MIN_SS \|\| SS(fs) > _MAX_SS) return FR_DISK_ERR;
adrevong	0:8b2a15992487	2252	#endif
adrevong	0:8b2a15992487	2253	/* Find an FAT partition on the drive. Supports only generic partitioning, FDISK and SFD. */
adrevong	0:8b2a15992487	2254	bsect = 0;
adrevong	0:8b2a15992487	2255	fmt = check_fs(fs, bsect); /* Load sector 0 and check if it is an FAT boot sector as SFD */
adrevong	0:8b2a15992487	2256	if (fmt == 1 \|\| (!fmt && (LD2PT(vol)))) { /* Not an FAT boot sector or forced partition number */
adrevong	0:8b2a15992487	2257	for (i = 0; i < 4; i++) { /* Get partition offset */
adrevong	0:8b2a15992487	2258	pt = fs->win + MBR_Table + i * SZ_PTE;
adrevong	0:8b2a15992487	2259	br[i] = pt[4] ? LD_DWORD(&pt[8]) : 0;
adrevong	0:8b2a15992487	2260	}
adrevong	0:8b2a15992487	2261	i = LD2PT(vol); /* Partition number: 0:auto, 1-4:forced */
adrevong	0:8b2a15992487	2262	if (i) i--;
adrevong	0:8b2a15992487	2263	do { /* Find an FAT volume */
adrevong	0:8b2a15992487	2264	bsect = br[i];
adrevong	0:8b2a15992487	2265	fmt = bsect ? check_fs(fs, bsect) : 2; /* Check the partition */
adrevong	0:8b2a15992487	2266	} while (!LD2PT(vol) && fmt && ++i < 4);
adrevong	0:8b2a15992487	2267	}
adrevong	0:8b2a15992487	2268	if (fmt == 3) return FR_DISK_ERR; /* An error occured in the disk I/O layer */
adrevong	0:8b2a15992487	2269	if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
adrevong	0:8b2a15992487	2270
adrevong	0:8b2a15992487	2271	/* An FAT volume is found. Following code initializes the file system object */
adrevong	0:8b2a15992487	2272
adrevong	0:8b2a15992487	2273	if (LD_WORD(fs->win + BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
adrevong	0:8b2a15992487	2274	return FR_NO_FILESYSTEM;
adrevong	0:8b2a15992487	2275
adrevong	0:8b2a15992487	2276	fasize = LD_WORD(fs->win + BPB_FATSz16); /* Number of sectors per FAT */
adrevong	0:8b2a15992487	2277	if (!fasize) fasize = LD_DWORD(fs->win + BPB_FATSz32);
adrevong	0:8b2a15992487	2278	fs->fsize = fasize;
adrevong	0:8b2a15992487	2279
adrevong	0:8b2a15992487	2280	fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
adrevong	0:8b2a15992487	2281	if (fs->n_fats != 1 && fs->n_fats != 2) /* (Must be 1 or 2) */
adrevong	0:8b2a15992487	2282	return FR_NO_FILESYSTEM;
adrevong	0:8b2a15992487	2283	fasize = fs->n_fats; / Number of sectors for FAT area */
adrevong	0:8b2a15992487	2284
adrevong	0:8b2a15992487	2285	fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
adrevong	0:8b2a15992487	2286	if (!fs->csize \|\| (fs->csize & (fs->csize - 1))) /* (Must be power of 2) */
adrevong	0:8b2a15992487	2287	return FR_NO_FILESYSTEM;
adrevong	0:8b2a15992487	2288
adrevong	0:8b2a15992487	2289	fs->n_rootdir = LD_WORD(fs->win + BPB_RootEntCnt); /* Number of root directory entries */
adrevong	0:8b2a15992487	2290	if (fs->n_rootdir % (SS(fs) / SZ_DIRE)) /* (Must be sector aligned) */
adrevong	0:8b2a15992487	2291	return FR_NO_FILESYSTEM;
adrevong	0:8b2a15992487	2292
adrevong	0:8b2a15992487	2293	tsect = LD_WORD(fs->win + BPB_TotSec16); /* Number of sectors on the volume */
adrevong	0:8b2a15992487	2294	if (!tsect) tsect = LD_DWORD(fs->win + BPB_TotSec32);
adrevong	0:8b2a15992487	2295
adrevong	0:8b2a15992487	2296	nrsv = LD_WORD(fs->win + BPB_RsvdSecCnt); /* Number of reserved sectors */
adrevong	0:8b2a15992487	2297	if (!nrsv) return FR_NO_FILESYSTEM; /* (Must not be 0) */
adrevong	0:8b2a15992487	2298
adrevong	0:8b2a15992487	2299	/* Determine the FAT sub type */
adrevong	0:8b2a15992487	2300	sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / SZ_DIRE); /* RSV + FAT + FATFS_DIR */
adrevong	0:8b2a15992487	2301	if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
adrevong	0:8b2a15992487	2302	nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
adrevong	0:8b2a15992487	2303	if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
adrevong	0:8b2a15992487	2304	fmt = FS_FAT12;
adrevong	0:8b2a15992487	2305	if (nclst >= MIN_FAT16) fmt = FS_FAT16;
adrevong	0:8b2a15992487	2306	if (nclst >= MIN_FAT32) fmt = FS_FAT32;
adrevong	0:8b2a15992487	2307
adrevong	0:8b2a15992487	2308	/* Boundaries and Limits */
adrevong	0:8b2a15992487	2309	fs->n_fatent = nclst + 2; /* Number of FAT entries */
adrevong	0:8b2a15992487	2310	fs->volbase = bsect; /* Volume start sector */
adrevong	0:8b2a15992487	2311	fs->fatbase = bsect + nrsv; /* FAT start sector */
adrevong	0:8b2a15992487	2312	fs->database = bsect + sysect; /* Data start sector */
adrevong	0:8b2a15992487	2313	if (fmt == FS_FAT32) {
adrevong	0:8b2a15992487	2314	if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
adrevong	0:8b2a15992487	2315	fs->dirbase = LD_DWORD(fs->win + BPB_RootClus); /* Root directory start cluster */
adrevong	0:8b2a15992487	2316	szbfat = fs->n_fatent * 4; /* (Needed FAT size) */
adrevong	0:8b2a15992487	2317	} else {
adrevong	0:8b2a15992487	2318	if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
adrevong	0:8b2a15992487	2319	fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
adrevong	0:8b2a15992487	2320	szbfat = (fmt == FS_FAT16) ? /* (Needed FAT size) */
adrevong	0:8b2a15992487	2321	fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
adrevong	0:8b2a15992487	2322	}
adrevong	0:8b2a15992487	2323	if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (BPB_FATSz must not be less than the size needed) */
adrevong	0:8b2a15992487	2324	return FR_NO_FILESYSTEM;
adrevong	0:8b2a15992487	2325
adrevong	0:8b2a15992487	2326	#if !_FS_READONLY
adrevong	0:8b2a15992487	2327	/* Initialize cluster allocation information */
adrevong	0:8b2a15992487	2328	fs->last_clust = fs->free_clust = 0xFFFFFFFF;
adrevong	0:8b2a15992487	2329
adrevong	0:8b2a15992487	2330	/* Get fsinfo if available */
adrevong	0:8b2a15992487	2331	fs->fsi_flag = 0x80;
adrevong	0:8b2a15992487	2332	#if (_FS_NOFSINFO & 3) != 3
adrevong	0:8b2a15992487	2333	if (fmt == FS_FAT32 /* Enable FSINFO only if FAT32 and BPB_FSInfo == 1 */
adrevong	0:8b2a15992487	2334	&& LD_WORD(fs->win + BPB_FSInfo) == 1
adrevong	0:8b2a15992487	2335	&& move_window(fs, bsect + 1) == FR_OK)
adrevong	0:8b2a15992487	2336	{
adrevong	0:8b2a15992487	2337	fs->fsi_flag = 0;
adrevong	0:8b2a15992487	2338	if (LD_WORD(fs->win + BS_55AA) == 0xAA55 /* Load FSINFO data if available */
adrevong	0:8b2a15992487	2339	&& LD_DWORD(fs->win + FSI_LeadSig) == 0x41615252
adrevong	0:8b2a15992487	2340	&& LD_DWORD(fs->win + FSI_StrucSig) == 0x61417272)
adrevong	0:8b2a15992487	2341	{
adrevong	0:8b2a15992487	2342	#if (_FS_NOFSINFO & 1) == 0
adrevong	0:8b2a15992487	2343	fs->free_clust = LD_DWORD(fs->win + FSI_Free_Count);
adrevong	0:8b2a15992487	2344	#endif
adrevong	0:8b2a15992487	2345	#if (_FS_NOFSINFO & 2) == 0
adrevong	0:8b2a15992487	2346	fs->last_clust = LD_DWORD(fs->win + FSI_Nxt_Free);
adrevong	0:8b2a15992487	2347	#endif
adrevong	0:8b2a15992487	2348	}
adrevong	0:8b2a15992487	2349	}
adrevong	0:8b2a15992487	2350	#endif
adrevong	0:8b2a15992487	2351	#endif
adrevong	0:8b2a15992487	2352	fs->fs_type = fmt; /* FAT sub-type */
adrevong	0:8b2a15992487	2353	fs->id = ++Fsid; /* File system mount ID */
adrevong	0:8b2a15992487	2354	#if _FS_RPATH
adrevong	0:8b2a15992487	2355	fs->cdir = 0; /* Set current directory to root */
adrevong	0:8b2a15992487	2356	#endif
adrevong	0:8b2a15992487	2357	#if _FS_LOCK /* Clear file lock semaphores */
adrevong	0:8b2a15992487	2358	clear_lock(fs);
adrevong	0:8b2a15992487	2359	#endif
adrevong	0:8b2a15992487	2360
adrevong	0:8b2a15992487	2361	return FR_OK;
adrevong	0:8b2a15992487	2362	}
adrevong	0:8b2a15992487	2363
adrevong	0:8b2a15992487	2364
adrevong	0:8b2a15992487	2365
adrevong	0:8b2a15992487	2366
adrevong	0:8b2a15992487	2367	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2368	/* Check if the file/directory object is valid or not */
adrevong	0:8b2a15992487	2369	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2370
adrevong	0:8b2a15992487	2371	static
adrevong	0:8b2a15992487	2372	FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
adrevong	0:8b2a15992487	2373	void* obj /* Pointer to the object FIL/FATFS_DIR to check validity */
adrevong	0:8b2a15992487	2374	)
adrevong	0:8b2a15992487	2375	{
adrevong	0:8b2a15992487	2376	FIL fil = (FIL)obj; /* Assuming offset of .fs and .id in the FIL/FATFS_DIR structure is identical */
adrevong	0:8b2a15992487	2377
adrevong	0:8b2a15992487	2378
adrevong	0:8b2a15992487	2379	if (!fil \|\| !fil->fs \|\| !fil->fs->fs_type \|\| fil->fs->id != fil->id \|\| (disk_status(fil->fs->drv) & STA_NOINIT))
adrevong	0:8b2a15992487	2380	return FR_INVALID_OBJECT;
adrevong	0:8b2a15992487	2381
adrevong	0:8b2a15992487	2382	ENTER_FF(fil->fs); /* Lock file system */
adrevong	0:8b2a15992487	2383
adrevong	0:8b2a15992487	2384	return FR_OK;
adrevong	0:8b2a15992487	2385	}
adrevong	0:8b2a15992487	2386
adrevong	0:8b2a15992487	2387
adrevong	0:8b2a15992487	2388
adrevong	0:8b2a15992487	2389
adrevong	0:8b2a15992487	2390	/*--------------------------------------------------------------------------
adrevong	0:8b2a15992487	2391
adrevong	0:8b2a15992487	2392	Public Functions
adrevong	0:8b2a15992487	2393
adrevong	0:8b2a15992487	2394	---------------------------------------------------------------------------*/
adrevong	0:8b2a15992487	2395
adrevong	0:8b2a15992487	2396
adrevong	0:8b2a15992487	2397
adrevong	0:8b2a15992487	2398	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2399	/* Mount/Unmount a Logical Drive */
adrevong	0:8b2a15992487	2400	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2401
adrevong	0:8b2a15992487	2402	FRESULT f_mount (
adrevong	0:8b2a15992487	2403	FATFS* fs, /* Pointer to the file system object (NULL:unmount)*/
adrevong	0:8b2a15992487	2404	const TCHAR* path, /* Logical drive number to be mounted/unmounted */
adrevong	0:8b2a15992487	2405	BYTE opt /* 0:Do not mount (delayed mount), 1:Mount immediately */
adrevong	0:8b2a15992487	2406	)
adrevong	0:8b2a15992487	2407	{
adrevong	0:8b2a15992487	2408	FATFS *cfs;
adrevong	0:8b2a15992487	2409	int vol;
adrevong	0:8b2a15992487	2410	FRESULT res;
adrevong	0:8b2a15992487	2411	const TCHAR *rp = path;
adrevong	0:8b2a15992487	2412
adrevong	0:8b2a15992487	2413
adrevong	0:8b2a15992487	2414	vol = get_ldnumber(&rp);
adrevong	0:8b2a15992487	2415	if (vol < 0) return FR_INVALID_DRIVE;
adrevong	0:8b2a15992487	2416	cfs = FatFs[vol]; /* Pointer to fs object */
adrevong	0:8b2a15992487	2417
adrevong	0:8b2a15992487	2418	if (cfs) {
adrevong	0:8b2a15992487	2419	#if _FS_LOCK
adrevong	0:8b2a15992487	2420	clear_lock(cfs);
adrevong	0:8b2a15992487	2421	#endif
adrevong	0:8b2a15992487	2422	#if _FS_REENTRANT /* Discard sync object of the current volume */
adrevong	0:8b2a15992487	2423	if (!ff_del_syncobj(cfs->sobj)) return FR_INT_ERR;
adrevong	0:8b2a15992487	2424	#endif
adrevong	0:8b2a15992487	2425	cfs->fs_type = 0; /* Clear old fs object */
adrevong	0:8b2a15992487	2426	}
adrevong	0:8b2a15992487	2427
adrevong	0:8b2a15992487	2428	if (fs) {
adrevong	0:8b2a15992487	2429	fs->fs_type = 0; /* Clear new fs object */
adrevong	0:8b2a15992487	2430	#if _FS_REENTRANT /* Create sync object for the new volume */
adrevong	0:8b2a15992487	2431	if (!ff_cre_syncobj((BYTE)vol, &fs->sobj)) return FR_INT_ERR;
adrevong	0:8b2a15992487	2432	#endif
adrevong	0:8b2a15992487	2433	}
adrevong	0:8b2a15992487	2434	FatFs[vol] = fs; /* Register new fs object */
adrevong	0:8b2a15992487	2435
adrevong	0:8b2a15992487	2436	if (!fs \|\| opt != 1) return FR_OK; /* Do not mount now, it will be mounted later */
adrevong	0:8b2a15992487	2437
adrevong	0:8b2a15992487	2438	res = find_volume(&fs, &path, 0); /* Force mounted the volume */
adrevong	0:8b2a15992487	2439	LEAVE_FF(fs, res);
adrevong	0:8b2a15992487	2440	}
adrevong	0:8b2a15992487	2441
adrevong	0:8b2a15992487	2442
adrevong	0:8b2a15992487	2443
adrevong	0:8b2a15992487	2444
adrevong	0:8b2a15992487	2445	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2446	/* Open or Create a File */
adrevong	0:8b2a15992487	2447	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2448
adrevong	0:8b2a15992487	2449	FRESULT f_open (
adrevong	0:8b2a15992487	2450	FIL* fp, /* Pointer to the blank file object */
adrevong	0:8b2a15992487	2451	const TCHAR* path, /* Pointer to the file name */
adrevong	0:8b2a15992487	2452	BYTE mode /* Access mode and file open mode flags */
adrevong	0:8b2a15992487	2453	)
adrevong	0:8b2a15992487	2454	{
adrevong	0:8b2a15992487	2455	FRESULT res;
adrevong	0:8b2a15992487	2456	FATFS_DIR dj;
adrevong	0:8b2a15992487	2457	BYTE *dir;
adrevong	0:8b2a15992487	2458	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	2459	#if !_FS_READONLY
adrevong	0:8b2a15992487	2460	DWORD dw, cl;
adrevong	0:8b2a15992487	2461	#endif
adrevong	0:8b2a15992487	2462
adrevong	0:8b2a15992487	2463
adrevong	0:8b2a15992487	2464	if (!fp) return FR_INVALID_OBJECT;
adrevong	0:8b2a15992487	2465	fp->fs = 0; /* Clear file object */
adrevong	0:8b2a15992487	2466
adrevong	0:8b2a15992487	2467	/* Get logical drive number */
adrevong	0:8b2a15992487	2468	#if !_FS_READONLY
adrevong	0:8b2a15992487	2469	mode &= FA_READ \| FA_WRITE \| FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW;
adrevong	0:8b2a15992487	2470	res = find_volume(&dj.fs, &path, (BYTE)(mode & ~FA_READ));
adrevong	0:8b2a15992487	2471	#else
adrevong	0:8b2a15992487	2472	mode &= FA_READ;
adrevong	0:8b2a15992487	2473	res = find_volume(&dj.fs, &path, 0);
adrevong	0:8b2a15992487	2474	#endif
adrevong	0:8b2a15992487	2475	if (res == FR_OK) {
adrevong	0:8b2a15992487	2476	INIT_BUF(dj);
adrevong	0:8b2a15992487	2477	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	2478	dir = dj.dir;
adrevong	0:8b2a15992487	2479	#if !_FS_READONLY /* R/W configuration */
adrevong	0:8b2a15992487	2480	if (res == FR_OK) {
adrevong	0:8b2a15992487	2481	if (!dir) /* Default directory itself */
adrevong	0:8b2a15992487	2482	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	2483	#if _FS_LOCK
adrevong	0:8b2a15992487	2484	else
adrevong	0:8b2a15992487	2485	res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
adrevong	0:8b2a15992487	2486	#endif
adrevong	0:8b2a15992487	2487	}
adrevong	0:8b2a15992487	2488	/* Create or Open a file */
adrevong	0:8b2a15992487	2489	if (mode & (FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW)) {
adrevong	0:8b2a15992487	2490	if (res != FR_OK) { /* No file, create new */
adrevong	0:8b2a15992487	2491	if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
adrevong	0:8b2a15992487	2492	#if _FS_LOCK
adrevong	0:8b2a15992487	2493	res = enq_lock() ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
adrevong	0:8b2a15992487	2494	#else
adrevong	0:8b2a15992487	2495	res = dir_register(&dj);
adrevong	0:8b2a15992487	2496	#endif
adrevong	0:8b2a15992487	2497	mode \|= FA_CREATE_ALWAYS; /* File is created */
adrevong	0:8b2a15992487	2498	dir = dj.dir; /* New entry */
adrevong	0:8b2a15992487	2499	}
adrevong	0:8b2a15992487	2500	else { /* Any object is already existing */
adrevong	0:8b2a15992487	2501	if (dir[DIR_Attr] & (AM_RDO \| AM_DIR)) { /* Cannot overwrite it (R/O or FATFS_DIR) */
adrevong	0:8b2a15992487	2502	res = FR_DENIED;
adrevong	0:8b2a15992487	2503	} else {
adrevong	0:8b2a15992487	2504	if (mode & FA_CREATE_NEW) /* Cannot create as new file */
adrevong	0:8b2a15992487	2505	res = FR_EXIST;
adrevong	0:8b2a15992487	2506	}
adrevong	0:8b2a15992487	2507	}
adrevong	0:8b2a15992487	2508	if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
adrevong	0:8b2a15992487	2509	dw = GET_FATTIME();
adrevong	0:8b2a15992487	2510	ST_DWORD(dir + DIR_CrtTime, dw);/* Set created time */
adrevong	0:8b2a15992487	2511	ST_DWORD(dir + DIR_WrtTime, dw);/* Set modified time */
adrevong	0:8b2a15992487	2512	dir[DIR_Attr] = 0; /* Reset attribute */
adrevong	0:8b2a15992487	2513	ST_DWORD(dir + DIR_FileSize, 0);/* Reset file size */
adrevong	0:8b2a15992487	2514	cl = ld_clust(dj.fs, dir); /* Get cluster chain */
adrevong	0:8b2a15992487	2515	st_clust(dir, 0); /* Reset cluster */
adrevong	0:8b2a15992487	2516	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	2517	if (cl) { /* Remove the cluster chain if exist */
adrevong	0:8b2a15992487	2518	dw = dj.fs->winsect;
adrevong	0:8b2a15992487	2519	res = remove_chain(dj.fs, cl);
adrevong	0:8b2a15992487	2520	if (res == FR_OK) {
adrevong	0:8b2a15992487	2521	dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
adrevong	0:8b2a15992487	2522	res = move_window(dj.fs, dw);
adrevong	0:8b2a15992487	2523	}
adrevong	0:8b2a15992487	2524	}
adrevong	0:8b2a15992487	2525	}
adrevong	0:8b2a15992487	2526	}
adrevong	0:8b2a15992487	2527	else { /* Open an existing file */
adrevong	0:8b2a15992487	2528	if (res == FR_OK) { /* Following succeeded */
adrevong	0:8b2a15992487	2529	if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
adrevong	0:8b2a15992487	2530	res = FR_NO_FILE;
adrevong	0:8b2a15992487	2531	} else {
adrevong	0:8b2a15992487	2532	if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
adrevong	0:8b2a15992487	2533	res = FR_DENIED;
adrevong	0:8b2a15992487	2534	}
adrevong	0:8b2a15992487	2535	}
adrevong	0:8b2a15992487	2536	}
adrevong	0:8b2a15992487	2537	if (res == FR_OK) {
adrevong	0:8b2a15992487	2538	if (mode & FA_CREATE_ALWAYS) /* Set file change flag if created or overwritten */
adrevong	0:8b2a15992487	2539	mode \|= FA__WRITTEN;
adrevong	0:8b2a15992487	2540	fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
adrevong	0:8b2a15992487	2541	fp->dir_ptr = dir;
adrevong	0:8b2a15992487	2542	#if _FS_LOCK
adrevong	0:8b2a15992487	2543	fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
adrevong	0:8b2a15992487	2544	if (!fp->lockid) res = FR_INT_ERR;
adrevong	0:8b2a15992487	2545	#endif
adrevong	0:8b2a15992487	2546	}
adrevong	0:8b2a15992487	2547
adrevong	0:8b2a15992487	2548	#else /* R/O configuration */
adrevong	0:8b2a15992487	2549	if (res == FR_OK) { /* Follow succeeded */
adrevong	0:8b2a15992487	2550	dir = dj.dir;
adrevong	0:8b2a15992487	2551	if (!dir) { /* Current directory itself */
adrevong	0:8b2a15992487	2552	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	2553	} else {
adrevong	0:8b2a15992487	2554	if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
adrevong	0:8b2a15992487	2555	res = FR_NO_FILE;
adrevong	0:8b2a15992487	2556	}
adrevong	0:8b2a15992487	2557	}
adrevong	0:8b2a15992487	2558	#endif
adrevong	0:8b2a15992487	2559	FREE_BUF();
adrevong	0:8b2a15992487	2560
adrevong	0:8b2a15992487	2561	if (res == FR_OK) {
adrevong	0:8b2a15992487	2562	fp->flag = mode; /* File access mode */
adrevong	0:8b2a15992487	2563	fp->err = 0; /* Clear error flag */
adrevong	0:8b2a15992487	2564	fp->sclust = ld_clust(dj.fs, dir); /* File start cluster */
adrevong	0:8b2a15992487	2565	fp->fsize = LD_DWORD(dir + DIR_FileSize); /* File size */
adrevong	0:8b2a15992487	2566	fp->fptr = 0; /* File pointer */
adrevong	0:8b2a15992487	2567	fp->dsect = 0;
adrevong	0:8b2a15992487	2568	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	2569	fp->cltbl = 0; /* Normal seek mode */
adrevong	0:8b2a15992487	2570	#endif
adrevong	0:8b2a15992487	2571	fp->fs = dj.fs; /* Validate file object */
adrevong	0:8b2a15992487	2572	fp->id = fp->fs->id;
adrevong	0:8b2a15992487	2573	}
adrevong	0:8b2a15992487	2574	}
adrevong	0:8b2a15992487	2575
adrevong	0:8b2a15992487	2576	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	2577	}
adrevong	0:8b2a15992487	2578
adrevong	0:8b2a15992487	2579
adrevong	0:8b2a15992487	2580
adrevong	0:8b2a15992487	2581
adrevong	0:8b2a15992487	2582	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2583	/* Read File */
adrevong	0:8b2a15992487	2584	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2585
adrevong	0:8b2a15992487	2586	FRESULT f_read (
adrevong	0:8b2a15992487	2587	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	2588	void* buff, /* Pointer to data buffer */
adrevong	0:8b2a15992487	2589	UINT btr, /* Number of bytes to read */
adrevong	0:8b2a15992487	2590	UINT* br /* Pointer to number of bytes read */
adrevong	0:8b2a15992487	2591	)
adrevong	0:8b2a15992487	2592	{
adrevong	0:8b2a15992487	2593	FRESULT res;
adrevong	0:8b2a15992487	2594	DWORD clst, sect, remain;
adrevong	0:8b2a15992487	2595	UINT rcnt, cc;
adrevong	0:8b2a15992487	2596	BYTE csect, rbuff = (BYTE)buff;
adrevong	0:8b2a15992487	2597
adrevong	0:8b2a15992487	2598
adrevong	0:8b2a15992487	2599	br = 0; / Clear read byte counter */
adrevong	0:8b2a15992487	2600
adrevong	0:8b2a15992487	2601	res = validate(fp); /* Check validity */
adrevong	0:8b2a15992487	2602	if (res != FR_OK) LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	2603	if (fp->err) /* Check error */
adrevong	0:8b2a15992487	2604	LEAVE_FF(fp->fs, (FRESULT)fp->err);
adrevong	0:8b2a15992487	2605	if (!(fp->flag & FA_READ)) /* Check access mode */
adrevong	0:8b2a15992487	2606	LEAVE_FF(fp->fs, FR_DENIED);
adrevong	0:8b2a15992487	2607	remain = fp->fsize - fp->fptr;
adrevong	0:8b2a15992487	2608	if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
adrevong	0:8b2a15992487	2609
adrevong	0:8b2a15992487	2610	for ( ; btr; /* Repeat until all data read */
adrevong	0:8b2a15992487	2611	rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
adrevong	0:8b2a15992487	2612	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
adrevong	0:8b2a15992487	2613	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
adrevong	0:8b2a15992487	2614	if (!csect) { /* On the cluster boundary? */
adrevong	0:8b2a15992487	2615	if (fp->fptr == 0) { /* On the top of the file? */
adrevong	0:8b2a15992487	2616	clst = fp->sclust; /* Follow from the origin */
adrevong	0:8b2a15992487	2617	} else { /* Middle or end of the file */
adrevong	0:8b2a15992487	2618	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	2619	if (fp->cltbl)
adrevong	0:8b2a15992487	2620	clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
adrevong	0:8b2a15992487	2621	else
adrevong	0:8b2a15992487	2622	#endif
adrevong	0:8b2a15992487	2623	clst = get_fat(fp->fs, fp->clust); /* Follow cluster chain on the FAT */
adrevong	0:8b2a15992487	2624	}
adrevong	0:8b2a15992487	2625	if (clst < 2) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	2626	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2627	fp->clust = clst; /* Update current cluster */
adrevong	0:8b2a15992487	2628	}
adrevong	0:8b2a15992487	2629	sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
adrevong	0:8b2a15992487	2630	if (!sect) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	2631	sect += csect;
adrevong	0:8b2a15992487	2632	cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
adrevong	0:8b2a15992487	2633	if (cc) { /* Read maximum contiguous sectors directly */
adrevong	0:8b2a15992487	2634	if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
adrevong	0:8b2a15992487	2635	cc = fp->fs->csize - csect;
adrevong	0:8b2a15992487	2636	if (disk_read(fp->fs->drv, rbuff, sect, cc) != RES_OK)
adrevong	0:8b2a15992487	2637	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2638	#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
adrevong	0:8b2a15992487	2639	#if _FS_TINY
adrevong	0:8b2a15992487	2640	if (fp->fs->wflag && fp->fs->winsect - sect < cc)
adrevong	0:8b2a15992487	2641	mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
adrevong	0:8b2a15992487	2642	#else
adrevong	0:8b2a15992487	2643	if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
adrevong	0:8b2a15992487	2644	mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
adrevong	0:8b2a15992487	2645	#endif
adrevong	0:8b2a15992487	2646	#endif
adrevong	0:8b2a15992487	2647	rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
adrevong	0:8b2a15992487	2648	continue;
adrevong	0:8b2a15992487	2649	}
adrevong	0:8b2a15992487	2650	#if !_FS_TINY
adrevong	0:8b2a15992487	2651	if (fp->dsect != sect) { /* Load data sector if not in cache */
adrevong	0:8b2a15992487	2652	#if !_FS_READONLY
adrevong	0:8b2a15992487	2653	if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
adrevong	0:8b2a15992487	2654	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	2655	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2656	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	2657	}
adrevong	0:8b2a15992487	2658	#endif
adrevong	0:8b2a15992487	2659	if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK) /* Fill sector cache */
adrevong	0:8b2a15992487	2660	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2661	}
adrevong	0:8b2a15992487	2662	#endif
adrevong	0:8b2a15992487	2663	fp->dsect = sect;
adrevong	0:8b2a15992487	2664	}
adrevong	0:8b2a15992487	2665	rcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
adrevong	0:8b2a15992487	2666	if (rcnt > btr) rcnt = btr;
adrevong	0:8b2a15992487	2667	#if _FS_TINY
adrevong	0:8b2a15992487	2668	if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
adrevong	0:8b2a15992487	2669	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2670	mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
adrevong	0:8b2a15992487	2671	#else
adrevong	0:8b2a15992487	2672	mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
adrevong	0:8b2a15992487	2673	#endif
adrevong	0:8b2a15992487	2674	}
adrevong	0:8b2a15992487	2675
adrevong	0:8b2a15992487	2676	LEAVE_FF(fp->fs, FR_OK);
adrevong	0:8b2a15992487	2677	}
adrevong	0:8b2a15992487	2678
adrevong	0:8b2a15992487	2679
adrevong	0:8b2a15992487	2680
adrevong	0:8b2a15992487	2681
adrevong	0:8b2a15992487	2682	#if !_FS_READONLY
adrevong	0:8b2a15992487	2683	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2684	/* Write File */
adrevong	0:8b2a15992487	2685	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2686
adrevong	0:8b2a15992487	2687	FRESULT f_write (
adrevong	0:8b2a15992487	2688	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	2689	const void buff, / Pointer to the data to be written */
adrevong	0:8b2a15992487	2690	UINT btw, /* Number of bytes to write */
adrevong	0:8b2a15992487	2691	UINT* bw /* Pointer to number of bytes written */
adrevong	0:8b2a15992487	2692	)
adrevong	0:8b2a15992487	2693	{
adrevong	0:8b2a15992487	2694	FRESULT res;
adrevong	0:8b2a15992487	2695	DWORD clst, sect;
adrevong	0:8b2a15992487	2696	UINT wcnt, cc;
adrevong	0:8b2a15992487	2697	const BYTE wbuff = (const BYTE)buff;
adrevong	0:8b2a15992487	2698	BYTE csect;
adrevong	0:8b2a15992487	2699	bool need_sync = false;
adrevong	0:8b2a15992487	2700
adrevong	0:8b2a15992487	2701	bw = 0; / Clear write byte counter */
adrevong	0:8b2a15992487	2702
adrevong	0:8b2a15992487	2703	res = validate(fp); /* Check validity */
adrevong	0:8b2a15992487	2704	if (res != FR_OK) LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	2705	if (fp->err) /* Check error */
adrevong	0:8b2a15992487	2706	LEAVE_FF(fp->fs, (FRESULT)fp->err);
adrevong	0:8b2a15992487	2707	if (!(fp->flag & FA_WRITE)) /* Check access mode */
adrevong	0:8b2a15992487	2708	LEAVE_FF(fp->fs, FR_DENIED);
adrevong	0:8b2a15992487	2709	if (fp->fptr + btw < fp->fptr) btw = 0; /* File size cannot reach 4GB */
adrevong	0:8b2a15992487	2710
adrevong	0:8b2a15992487	2711	for ( ; btw; /* Repeat until all data written */
adrevong	0:8b2a15992487	2712	wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
adrevong	0:8b2a15992487	2713	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
adrevong	0:8b2a15992487	2714	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
adrevong	0:8b2a15992487	2715	if (!csect) { /* On the cluster boundary? */
adrevong	0:8b2a15992487	2716	if (fp->fptr == 0) { /* On the top of the file? */
adrevong	0:8b2a15992487	2717	clst = fp->sclust; /* Follow from the origin */
adrevong	0:8b2a15992487	2718	if (clst == 0) /* When no cluster is allocated, */
adrevong	0:8b2a15992487	2719	clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
adrevong	0:8b2a15992487	2720	} else { /* Middle or end of the file */
adrevong	0:8b2a15992487	2721	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	2722	if (fp->cltbl)
adrevong	0:8b2a15992487	2723	clst = clmt_clust(fp, fp->fptr); /* Get cluster# from the CLMT */
adrevong	0:8b2a15992487	2724	else
adrevong	0:8b2a15992487	2725	#endif
adrevong	0:8b2a15992487	2726	clst = create_chain(fp->fs, fp->clust); /* Follow or stretch cluster chain on the FAT */
adrevong	0:8b2a15992487	2727	}
adrevong	0:8b2a15992487	2728	if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
adrevong	0:8b2a15992487	2729	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	2730	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2731	fp->clust = clst; /* Update current cluster */
adrevong	0:8b2a15992487	2732	if (fp->sclust == 0) fp->sclust = clst; /* Set start cluster if the first write */
adrevong	0:8b2a15992487	2733
adrevong	0:8b2a15992487	2734	#if FLUSH_ON_NEW_CLUSTER
adrevong	0:8b2a15992487	2735	// We do not need to flush for the first cluster
adrevong	0:8b2a15992487	2736	if (fp->fptr != 0) {
adrevong	0:8b2a15992487	2737	need_sync = true;
adrevong	0:8b2a15992487	2738	}
adrevong	0:8b2a15992487	2739	#endif
adrevong	0:8b2a15992487	2740	}
adrevong	0:8b2a15992487	2741	#if _FS_TINY
adrevong	0:8b2a15992487	2742	if (fp->fs->winsect == fp->dsect && sync_window(fp->fs)) /* Write-back sector cache */
adrevong	0:8b2a15992487	2743	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2744	#else
adrevong	0:8b2a15992487	2745	if (fp->flag & FA__DIRTY) { /* Write-back sector cache */
adrevong	0:8b2a15992487	2746	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	2747	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2748	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	2749	}
adrevong	0:8b2a15992487	2750	#endif
adrevong	0:8b2a15992487	2751	sect = clust2sect(fp->fs, fp->clust); /* Get current sector */
adrevong	0:8b2a15992487	2752	if (!sect) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	2753	sect += csect;
adrevong	0:8b2a15992487	2754	cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
adrevong	0:8b2a15992487	2755	if (cc) { /* Write maximum contiguous sectors directly */
adrevong	0:8b2a15992487	2756	if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
adrevong	0:8b2a15992487	2757	cc = fp->fs->csize - csect;
adrevong	0:8b2a15992487	2758	if (disk_write(fp->fs->drv, wbuff, sect, cc) != RES_OK)
adrevong	0:8b2a15992487	2759	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2760	#if _FS_MINIMIZE <= 2
adrevong	0:8b2a15992487	2761	#if _FS_TINY
adrevong	0:8b2a15992487	2762	if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
adrevong	0:8b2a15992487	2763	mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
adrevong	0:8b2a15992487	2764	fp->fs->wflag = 0;
adrevong	0:8b2a15992487	2765	}
adrevong	0:8b2a15992487	2766	#else
adrevong	0:8b2a15992487	2767	if (fp->dsect - sect < cc) { /* Refill sector cache if it gets invalidated by the direct write */
adrevong	0:8b2a15992487	2768	mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
adrevong	0:8b2a15992487	2769	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	2770	}
adrevong	0:8b2a15992487	2771	#endif
adrevong	0:8b2a15992487	2772	#endif
adrevong	0:8b2a15992487	2773	wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
adrevong	0:8b2a15992487	2774	#if FLUSH_ON_NEW_SECTOR
adrevong	0:8b2a15992487	2775	need_sync = true;
adrevong	0:8b2a15992487	2776	#endif
adrevong	0:8b2a15992487	2777	continue;
adrevong	0:8b2a15992487	2778	}
adrevong	0:8b2a15992487	2779	#if _FS_TINY
adrevong	0:8b2a15992487	2780	if (fp->fptr >= fp->fsize) { /* Avoid silly cache filling at growing edge */
adrevong	0:8b2a15992487	2781	if (sync_window(fp->fs)) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2782	fp->fs->winsect = sect;
adrevong	0:8b2a15992487	2783	}
adrevong	0:8b2a15992487	2784	#else
adrevong	0:8b2a15992487	2785	if (fp->dsect != sect) { /* Fill sector cache with file data */
adrevong	0:8b2a15992487	2786	if (fp->fptr < fp->fsize &&
adrevong	0:8b2a15992487	2787	disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
adrevong	0:8b2a15992487	2788	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2789	}
adrevong	0:8b2a15992487	2790	#endif
adrevong	0:8b2a15992487	2791	fp->dsect = sect;
adrevong	0:8b2a15992487	2792	}
adrevong	0:8b2a15992487	2793	wcnt = SS(fp->fs) - ((UINT)fp->fptr % SS(fp->fs));/* Put partial sector into file I/O buffer */
adrevong	0:8b2a15992487	2794	if (wcnt > btw) wcnt = btw;
adrevong	0:8b2a15992487	2795	#if _FS_TINY
adrevong	0:8b2a15992487	2796	if (move_window(fp->fs, fp->dsect) != FR_OK) /* Move sector window */
adrevong	0:8b2a15992487	2797	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2798	mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
adrevong	0:8b2a15992487	2799	fp->fs->wflag = 1;
adrevong	0:8b2a15992487	2800	#else
adrevong	0:8b2a15992487	2801	mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
adrevong	0:8b2a15992487	2802	fp->flag \|= FA__DIRTY;
adrevong	0:8b2a15992487	2803	#endif
adrevong	0:8b2a15992487	2804	}
adrevong	0:8b2a15992487	2805
adrevong	0:8b2a15992487	2806	if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
adrevong	0:8b2a15992487	2807	fp->flag \|= FA__WRITTEN; /* Set file change flag */
adrevong	0:8b2a15992487	2808
adrevong	0:8b2a15992487	2809	if (need_sync) {
adrevong	0:8b2a15992487	2810	f_sync (fp);
adrevong	0:8b2a15992487	2811	}
adrevong	0:8b2a15992487	2812
adrevong	0:8b2a15992487	2813	LEAVE_FF(fp->fs, FR_OK);
adrevong	0:8b2a15992487	2814	}
adrevong	0:8b2a15992487	2815
adrevong	0:8b2a15992487	2816
adrevong	0:8b2a15992487	2817
adrevong	0:8b2a15992487	2818
adrevong	0:8b2a15992487	2819	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2820	/* Synchronize the File */
adrevong	0:8b2a15992487	2821	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2822
adrevong	0:8b2a15992487	2823	FRESULT f_sync (
adrevong	0:8b2a15992487	2824	FIL* fp /* Pointer to the file object */
adrevong	0:8b2a15992487	2825	)
adrevong	0:8b2a15992487	2826	{
adrevong	0:8b2a15992487	2827	FRESULT res;
adrevong	0:8b2a15992487	2828	DWORD tm;
adrevong	0:8b2a15992487	2829	BYTE *dir;
adrevong	0:8b2a15992487	2830
adrevong	0:8b2a15992487	2831
adrevong	0:8b2a15992487	2832	res = validate(fp); /* Check validity of the object */
adrevong	0:8b2a15992487	2833	if (res == FR_OK) {
adrevong	0:8b2a15992487	2834	if (fp->flag & FA__WRITTEN) { /* Is there any change to the file? */
adrevong	0:8b2a15992487	2835	#if !_FS_TINY
adrevong	0:8b2a15992487	2836	if (fp->flag & FA__DIRTY) { /* Write-back cached data if needed */
adrevong	0:8b2a15992487	2837	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	2838	LEAVE_FF(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	2839	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	2840	}
adrevong	0:8b2a15992487	2841	#endif
adrevong	0:8b2a15992487	2842	/* Update the directory entry */
adrevong	0:8b2a15992487	2843	res = move_window(fp->fs, fp->dir_sect);
adrevong	0:8b2a15992487	2844	if (res == FR_OK) {
adrevong	0:8b2a15992487	2845	dir = fp->dir_ptr;
adrevong	0:8b2a15992487	2846	dir[DIR_Attr] \|= AM_ARC; /* Set archive bit */
adrevong	0:8b2a15992487	2847	ST_DWORD(dir + DIR_FileSize, fp->fsize); /* Update file size */
adrevong	0:8b2a15992487	2848	st_clust(dir, fp->sclust); /* Update start cluster */
adrevong	0:8b2a15992487	2849	tm = GET_FATTIME(); /* Update modified time */
adrevong	0:8b2a15992487	2850	ST_DWORD(dir + DIR_WrtTime, tm);
adrevong	0:8b2a15992487	2851	ST_WORD(dir + DIR_LstAccDate, 0);
adrevong	0:8b2a15992487	2852	fp->flag &= ~FA__WRITTEN;
adrevong	0:8b2a15992487	2853	fp->fs->wflag = 1;
adrevong	0:8b2a15992487	2854	res = sync_fs(fp->fs);
adrevong	0:8b2a15992487	2855	}
adrevong	0:8b2a15992487	2856	}
adrevong	0:8b2a15992487	2857	}
adrevong	0:8b2a15992487	2858
adrevong	0:8b2a15992487	2859	LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	2860	}
adrevong	0:8b2a15992487	2861
adrevong	0:8b2a15992487	2862	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	2863
adrevong	0:8b2a15992487	2864
adrevong	0:8b2a15992487	2865
adrevong	0:8b2a15992487	2866
adrevong	0:8b2a15992487	2867	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2868	/* Close File */
adrevong	0:8b2a15992487	2869	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2870
adrevong	0:8b2a15992487	2871	FRESULT f_close (
adrevong	0:8b2a15992487	2872	FIL fp / Pointer to the file object to be closed */
adrevong	0:8b2a15992487	2873	)
adrevong	0:8b2a15992487	2874	{
adrevong	0:8b2a15992487	2875	FRESULT res;
adrevong	0:8b2a15992487	2876
adrevong	0:8b2a15992487	2877
adrevong	0:8b2a15992487	2878	#if !_FS_READONLY
adrevong	0:8b2a15992487	2879	res = f_sync(fp); /* Flush cached data */
adrevong	0:8b2a15992487	2880	if (res == FR_OK)
adrevong	0:8b2a15992487	2881	#endif
adrevong	0:8b2a15992487	2882	{
adrevong	0:8b2a15992487	2883	res = validate(fp); /* Lock volume */
adrevong	0:8b2a15992487	2884	if (res == FR_OK) {
adrevong	0:8b2a15992487	2885	#if _FS_REENTRANT
adrevong	0:8b2a15992487	2886	FATFS *fs = fp->fs;
adrevong	0:8b2a15992487	2887	#endif
adrevong	0:8b2a15992487	2888	#if _FS_LOCK
adrevong	0:8b2a15992487	2889	res = dec_lock(fp->lockid); /* Decrement file open counter */
adrevong	0:8b2a15992487	2890	if (res == FR_OK)
adrevong	0:8b2a15992487	2891	#endif
adrevong	0:8b2a15992487	2892	fp->fs = 0; /* Invalidate file object */
adrevong	0:8b2a15992487	2893	#if _FS_REENTRANT
adrevong	0:8b2a15992487	2894	unlock_fs(fs, FR_OK); /* Unlock volume */
adrevong	0:8b2a15992487	2895	#endif
adrevong	0:8b2a15992487	2896	}
adrevong	0:8b2a15992487	2897	}
adrevong	0:8b2a15992487	2898	return res;
adrevong	0:8b2a15992487	2899	}
adrevong	0:8b2a15992487	2900
adrevong	0:8b2a15992487	2901
adrevong	0:8b2a15992487	2902
adrevong	0:8b2a15992487	2903
adrevong	0:8b2a15992487	2904	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2905	/* Change Current Directory or Current Drive, Get Current Directory */
adrevong	0:8b2a15992487	2906	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	2907
adrevong	0:8b2a15992487	2908	#if _FS_RPATH >= 1
adrevong	0:8b2a15992487	2909	#if _VOLUMES >= 2
adrevong	0:8b2a15992487	2910	FRESULT f_chdrive (
adrevong	0:8b2a15992487	2911	const TCHAR* path /* Drive number */
adrevong	0:8b2a15992487	2912	)
adrevong	0:8b2a15992487	2913	{
adrevong	0:8b2a15992487	2914	int vol;
adrevong	0:8b2a15992487	2915
adrevong	0:8b2a15992487	2916
adrevong	0:8b2a15992487	2917	vol = get_ldnumber(&path);
adrevong	0:8b2a15992487	2918	if (vol < 0) return FR_INVALID_DRIVE;
adrevong	0:8b2a15992487	2919
adrevong	0:8b2a15992487	2920	CurrVol = (BYTE)vol;
adrevong	0:8b2a15992487	2921
adrevong	0:8b2a15992487	2922	return FR_OK;
adrevong	0:8b2a15992487	2923	}
adrevong	0:8b2a15992487	2924	#endif
adrevong	0:8b2a15992487	2925
adrevong	0:8b2a15992487	2926
adrevong	0:8b2a15992487	2927	FRESULT f_chdir (
adrevong	0:8b2a15992487	2928	const TCHAR* path /* Pointer to the directory path */
adrevong	0:8b2a15992487	2929	)
adrevong	0:8b2a15992487	2930	{
adrevong	0:8b2a15992487	2931	FRESULT res;
adrevong	0:8b2a15992487	2932	FATFS_DIR dj;
adrevong	0:8b2a15992487	2933	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	2934
adrevong	0:8b2a15992487	2935
adrevong	0:8b2a15992487	2936	/* Get logical drive number */
adrevong	0:8b2a15992487	2937	res = find_volume(&dj.fs, &path, 0);
adrevong	0:8b2a15992487	2938	if (res == FR_OK) {
adrevong	0:8b2a15992487	2939	INIT_BUF(dj);
adrevong	0:8b2a15992487	2940	res = follow_path(&dj, path); /* Follow the path */
adrevong	0:8b2a15992487	2941	FREE_BUF();
adrevong	0:8b2a15992487	2942	if (res == FR_OK) { /* Follow completed */
adrevong	0:8b2a15992487	2943	if (!dj.dir) {
adrevong	0:8b2a15992487	2944	dj.fs->cdir = dj.sclust; /* Start directory itself */
adrevong	0:8b2a15992487	2945	} else {
adrevong	0:8b2a15992487	2946	if (dj.dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
adrevong	0:8b2a15992487	2947	dj.fs->cdir = ld_clust(dj.fs, dj.dir);
adrevong	0:8b2a15992487	2948	else
adrevong	0:8b2a15992487	2949	res = FR_NO_PATH; /* Reached but a file */
adrevong	0:8b2a15992487	2950	}
adrevong	0:8b2a15992487	2951	}
adrevong	0:8b2a15992487	2952	if (res == FR_NO_FILE) res = FR_NO_PATH;
adrevong	0:8b2a15992487	2953	}
adrevong	0:8b2a15992487	2954
adrevong	0:8b2a15992487	2955	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	2956	}
adrevong	0:8b2a15992487	2957
adrevong	0:8b2a15992487	2958
adrevong	0:8b2a15992487	2959	#if _FS_RPATH >= 2
adrevong	0:8b2a15992487	2960	FRESULT f_getcwd (
adrevong	0:8b2a15992487	2961	TCHAR* buff, /* Pointer to the directory path */
adrevong	0:8b2a15992487	2962	UINT len /* Size of path */
adrevong	0:8b2a15992487	2963	)
adrevong	0:8b2a15992487	2964	{
adrevong	0:8b2a15992487	2965	FRESULT res;
adrevong	0:8b2a15992487	2966	FATFS_DIR dj;
adrevong	0:8b2a15992487	2967	UINT i, n;
adrevong	0:8b2a15992487	2968	DWORD ccl;
adrevong	0:8b2a15992487	2969	TCHAR *tp;
adrevong	0:8b2a15992487	2970	FILINFO fno;
adrevong	0:8b2a15992487	2971	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	2972
adrevong	0:8b2a15992487	2973
adrevong	0:8b2a15992487	2974	*buff = 0;
adrevong	0:8b2a15992487	2975	/* Get logical drive number */
adrevong	0:8b2a15992487	2976	res = find_volume(&dj.fs, (const TCHAR*)&buff, 0); / Get current volume */
adrevong	0:8b2a15992487	2977	if (res == FR_OK) {
adrevong	0:8b2a15992487	2978	INIT_BUF(dj);
adrevong	0:8b2a15992487	2979	i = len; /* Bottom of buffer (directory stack base) */
adrevong	0:8b2a15992487	2980	dj.sclust = dj.fs->cdir; /* Start to follow upper directory from current directory */
adrevong	0:8b2a15992487	2981	while ((ccl = dj.sclust) != 0) { /* Repeat while current directory is a sub-directory */
adrevong	0:8b2a15992487	2982	res = dir_sdi(&dj, 1); /* Get parent directory */
adrevong	0:8b2a15992487	2983	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2984	res = dir_read(&dj, 0);
adrevong	0:8b2a15992487	2985	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2986	dj.sclust = ld_clust(dj.fs, dj.dir); /* Goto parent directory */
adrevong	0:8b2a15992487	2987	res = dir_sdi(&dj, 0);
adrevong	0:8b2a15992487	2988	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2989	do { /* Find the entry links to the child directory */
adrevong	0:8b2a15992487	2990	res = dir_read(&dj, 0);
adrevong	0:8b2a15992487	2991	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2992	if (ccl == ld_clust(dj.fs, dj.dir)) break; /* Found the entry */
adrevong	0:8b2a15992487	2993	res = dir_next(&dj, 0);
adrevong	0:8b2a15992487	2994	} while (res == FR_OK);
adrevong	0:8b2a15992487	2995	if (res == FR_NO_FILE) res = FR_INT_ERR;/* It cannot be 'not found'. */
adrevong	0:8b2a15992487	2996	if (res != FR_OK) break;
adrevong	0:8b2a15992487	2997	#if _USE_LFN
adrevong	0:8b2a15992487	2998	fno.lfname = buff;
adrevong	0:8b2a15992487	2999	fno.lfsize = i;
adrevong	0:8b2a15992487	3000	#endif
adrevong	0:8b2a15992487	3001	get_fileinfo(&dj, &fno); /* Get the directory name and push it to the buffer */
adrevong	0:8b2a15992487	3002	tp = fno.fname;
adrevong	0:8b2a15992487	3003	#if _USE_LFN
adrevong	0:8b2a15992487	3004	if (*buff) tp = buff;
adrevong	0:8b2a15992487	3005	#endif
adrevong	0:8b2a15992487	3006	for (n = 0; tp[n]; n++) ;
adrevong	0:8b2a15992487	3007	if (i < n + 3) {
adrevong	0:8b2a15992487	3008	res = FR_NOT_ENOUGH_CORE; break;
adrevong	0:8b2a15992487	3009	}
adrevong	0:8b2a15992487	3010	while (n) buff[--i] = tp[--n];
adrevong	0:8b2a15992487	3011	buff[--i] = '/';
adrevong	0:8b2a15992487	3012	}
adrevong	0:8b2a15992487	3013	tp = buff;
adrevong	0:8b2a15992487	3014	if (res == FR_OK) {
adrevong	0:8b2a15992487	3015	#if _VOLUMES >= 2
adrevong	0:8b2a15992487	3016	tp++ = '0' + CurrVol; / Put drive number */
adrevong	0:8b2a15992487	3017	*tp++ = ':';
adrevong	0:8b2a15992487	3018	#endif
adrevong	0:8b2a15992487	3019	if (i == len) { /* Root-directory */
adrevong	0:8b2a15992487	3020	*tp++ = '/';
adrevong	0:8b2a15992487	3021	} else { /* Sub-directroy */
adrevong	0:8b2a15992487	3022	do /* Add stacked path str */
adrevong	0:8b2a15992487	3023	*tp++ = buff[i++];
adrevong	0:8b2a15992487	3024	while (i < len);
adrevong	0:8b2a15992487	3025	}
adrevong	0:8b2a15992487	3026	}
adrevong	0:8b2a15992487	3027	*tp = 0;
adrevong	0:8b2a15992487	3028	FREE_BUF();
adrevong	0:8b2a15992487	3029	}
adrevong	0:8b2a15992487	3030
adrevong	0:8b2a15992487	3031	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3032	}
adrevong	0:8b2a15992487	3033	#endif /* _FS_RPATH >= 2 */
adrevong	0:8b2a15992487	3034	#endif /* _FS_RPATH >= 1 */
adrevong	0:8b2a15992487	3035
adrevong	0:8b2a15992487	3036
adrevong	0:8b2a15992487	3037
adrevong	0:8b2a15992487	3038	#if _FS_MINIMIZE <= 2
adrevong	0:8b2a15992487	3039	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3040	/* Seek File R/W Pointer */
adrevong	0:8b2a15992487	3041	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3042
adrevong	0:8b2a15992487	3043	FRESULT f_lseek (
adrevong	0:8b2a15992487	3044	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	3045	DWORD ofs /* File pointer from top of file */
adrevong	0:8b2a15992487	3046	)
adrevong	0:8b2a15992487	3047	{
adrevong	0:8b2a15992487	3048	FRESULT res;
adrevong	0:8b2a15992487	3049	DWORD clst, bcs, nsect, ifptr;
adrevong	0:8b2a15992487	3050	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	3051	DWORD cl, pcl, ncl, tcl, dsc, tlen, ulen, *tbl;
adrevong	0:8b2a15992487	3052	#endif
adrevong	0:8b2a15992487	3053
adrevong	0:8b2a15992487	3054
adrevong	0:8b2a15992487	3055	res = validate(fp); /* Check validity of the object */
adrevong	0:8b2a15992487	3056	if (res != FR_OK) LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	3057	if (fp->err) /* Check error */
adrevong	0:8b2a15992487	3058	LEAVE_FF(fp->fs, (FRESULT)fp->err);
adrevong	0:8b2a15992487	3059
adrevong	0:8b2a15992487	3060	#if _USE_FASTSEEK
adrevong	0:8b2a15992487	3061	if (fp->cltbl) { /* Fast seek */
adrevong	0:8b2a15992487	3062	if (ofs == CREATE_LINKMAP) { /* Create CLMT */
adrevong	0:8b2a15992487	3063	tbl = fp->cltbl;
adrevong	0:8b2a15992487	3064	tlen = tbl++; ulen = 2; / Given table size and required table size */
adrevong	0:8b2a15992487	3065	cl = fp->sclust; /* Top of the chain */
adrevong	0:8b2a15992487	3066	if (cl) {
adrevong	0:8b2a15992487	3067	do {
adrevong	0:8b2a15992487	3068	/* Get a fragment */
adrevong	0:8b2a15992487	3069	tcl = cl; ncl = 0; ulen += 2; /* Top, length and used items */
adrevong	0:8b2a15992487	3070	do {
adrevong	0:8b2a15992487	3071	pcl = cl; ncl++;
adrevong	0:8b2a15992487	3072	cl = get_fat(fp->fs, cl);
adrevong	0:8b2a15992487	3073	if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	3074	if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3075	} while (cl == pcl + 1);
adrevong	0:8b2a15992487	3076	if (ulen <= tlen) { /* Store the length and top of the fragment */
adrevong	0:8b2a15992487	3077	tbl++ = ncl; tbl++ = tcl;
adrevong	0:8b2a15992487	3078	}
adrevong	0:8b2a15992487	3079	} while (cl < fp->fs->n_fatent); /* Repeat until end of chain */
adrevong	0:8b2a15992487	3080	}
adrevong	0:8b2a15992487	3081	fp->cltbl = ulen; / Number of items used */
adrevong	0:8b2a15992487	3082	if (ulen <= tlen)
adrevong	0:8b2a15992487	3083	tbl = 0; / Terminate table */
adrevong	0:8b2a15992487	3084	else
adrevong	0:8b2a15992487	3085	res = FR_NOT_ENOUGH_CORE; /* Given table size is smaller than required */
adrevong	0:8b2a15992487	3086
adrevong	0:8b2a15992487	3087	} else { /* Fast seek */
adrevong	0:8b2a15992487	3088	if (ofs > fp->fsize) /* Clip offset at the file size */
adrevong	0:8b2a15992487	3089	ofs = fp->fsize;
adrevong	0:8b2a15992487	3090	fp->fptr = ofs; /* Set file pointer */
adrevong	0:8b2a15992487	3091	if (ofs) {
adrevong	0:8b2a15992487	3092	fp->clust = clmt_clust(fp, ofs - 1);
adrevong	0:8b2a15992487	3093	dsc = clust2sect(fp->fs, fp->clust);
adrevong	0:8b2a15992487	3094	if (!dsc) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	3095	dsc += (ofs - 1) / SS(fp->fs) & (fp->fs->csize - 1);
adrevong	0:8b2a15992487	3096	if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) { /* Refill sector cache if needed */
adrevong	0:8b2a15992487	3097	#if !_FS_TINY
adrevong	0:8b2a15992487	3098	#if !_FS_READONLY
adrevong	0:8b2a15992487	3099	if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
adrevong	0:8b2a15992487	3100	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	3101	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3102	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	3103	}
adrevong	0:8b2a15992487	3104	#endif
adrevong	0:8b2a15992487	3105	if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK) /* Load current sector */
adrevong	0:8b2a15992487	3106	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3107	#endif
adrevong	0:8b2a15992487	3108	fp->dsect = dsc;
adrevong	0:8b2a15992487	3109	}
adrevong	0:8b2a15992487	3110	}
adrevong	0:8b2a15992487	3111	}
adrevong	0:8b2a15992487	3112	} else
adrevong	0:8b2a15992487	3113	#endif
adrevong	0:8b2a15992487	3114
adrevong	0:8b2a15992487	3115	/* Normal Seek */
adrevong	0:8b2a15992487	3116	{
adrevong	0:8b2a15992487	3117	if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
adrevong	0:8b2a15992487	3118	#if !_FS_READONLY
adrevong	0:8b2a15992487	3119	&& !(fp->flag & FA_WRITE)
adrevong	0:8b2a15992487	3120	#endif
adrevong	0:8b2a15992487	3121	) ofs = fp->fsize;
adrevong	0:8b2a15992487	3122
adrevong	0:8b2a15992487	3123	ifptr = fp->fptr;
adrevong	0:8b2a15992487	3124	fp->fptr = nsect = 0;
adrevong	0:8b2a15992487	3125	if (ofs) {
adrevong	0:8b2a15992487	3126	bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
adrevong	0:8b2a15992487	3127	if (ifptr > 0 &&
adrevong	0:8b2a15992487	3128	(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
adrevong	0:8b2a15992487	3129	fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
adrevong	0:8b2a15992487	3130	ofs -= fp->fptr;
adrevong	0:8b2a15992487	3131	clst = fp->clust;
adrevong	0:8b2a15992487	3132	} else { /* When seek to back cluster, */
adrevong	0:8b2a15992487	3133	clst = fp->sclust; /* start from the first cluster */
adrevong	0:8b2a15992487	3134	#if !_FS_READONLY
adrevong	0:8b2a15992487	3135	if (clst == 0) { /* If no cluster chain, create a new chain */
adrevong	0:8b2a15992487	3136	clst = create_chain(fp->fs, 0);
adrevong	0:8b2a15992487	3137	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	3138	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3139	fp->sclust = clst;
adrevong	0:8b2a15992487	3140	}
adrevong	0:8b2a15992487	3141	#endif
adrevong	0:8b2a15992487	3142	fp->clust = clst;
adrevong	0:8b2a15992487	3143	}
adrevong	0:8b2a15992487	3144	if (clst != 0) {
adrevong	0:8b2a15992487	3145	while (ofs > bcs) { /* Cluster following loop */
adrevong	0:8b2a15992487	3146	#if !_FS_READONLY
adrevong	0:8b2a15992487	3147	if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
adrevong	0:8b2a15992487	3148	clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
adrevong	0:8b2a15992487	3149	if (clst == 0) { /* When disk gets full, clip file size */
adrevong	0:8b2a15992487	3150	ofs = bcs; break;
adrevong	0:8b2a15992487	3151	}
adrevong	0:8b2a15992487	3152	} else
adrevong	0:8b2a15992487	3153	#endif
adrevong	0:8b2a15992487	3154	clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
adrevong	0:8b2a15992487	3155	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3156	if (clst <= 1 \|\| clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	3157	fp->clust = clst;
adrevong	0:8b2a15992487	3158	fp->fptr += bcs;
adrevong	0:8b2a15992487	3159	ofs -= bcs;
adrevong	0:8b2a15992487	3160	}
adrevong	0:8b2a15992487	3161	fp->fptr += ofs;
adrevong	0:8b2a15992487	3162	if (ofs % SS(fp->fs)) {
adrevong	0:8b2a15992487	3163	nsect = clust2sect(fp->fs, clst); /* Current sector */
adrevong	0:8b2a15992487	3164	if (!nsect) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	3165	nsect += ofs / SS(fp->fs);
adrevong	0:8b2a15992487	3166	}
adrevong	0:8b2a15992487	3167	}
adrevong	0:8b2a15992487	3168	}
adrevong	0:8b2a15992487	3169	if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) { /* Fill sector cache if needed */
adrevong	0:8b2a15992487	3170	#if !_FS_TINY
adrevong	0:8b2a15992487	3171	#if !_FS_READONLY
adrevong	0:8b2a15992487	3172	if (fp->flag & FA__DIRTY) { /* Write-back dirty sector cache */
adrevong	0:8b2a15992487	3173	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	3174	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3175	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	3176	}
adrevong	0:8b2a15992487	3177	#endif
adrevong	0:8b2a15992487	3178	if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK) /* Fill sector cache */
adrevong	0:8b2a15992487	3179	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	3180	#endif
adrevong	0:8b2a15992487	3181	fp->dsect = nsect;
adrevong	0:8b2a15992487	3182	}
adrevong	0:8b2a15992487	3183	#if !_FS_READONLY
adrevong	0:8b2a15992487	3184	if (fp->fptr > fp->fsize) { /* Set file change flag if the file size is extended */
adrevong	0:8b2a15992487	3185	fp->fsize = fp->fptr;
adrevong	0:8b2a15992487	3186	fp->flag \|= FA__WRITTEN;
adrevong	0:8b2a15992487	3187	}
adrevong	0:8b2a15992487	3188	#endif
adrevong	0:8b2a15992487	3189	}
adrevong	0:8b2a15992487	3190
adrevong	0:8b2a15992487	3191	LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	3192	}
adrevong	0:8b2a15992487	3193
adrevong	0:8b2a15992487	3194
adrevong	0:8b2a15992487	3195
adrevong	0:8b2a15992487	3196	#if _FS_MINIMIZE <= 1
adrevong	0:8b2a15992487	3197	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3198	/* Create a Directory Object */
adrevong	0:8b2a15992487	3199	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3200
adrevong	0:8b2a15992487	3201	FRESULT f_opendir (
adrevong	0:8b2a15992487	3202	FATFS_DIR* dp, /* Pointer to directory object to create */
adrevong	0:8b2a15992487	3203	const TCHAR* path /* Pointer to the directory path */
adrevong	0:8b2a15992487	3204	)
adrevong	0:8b2a15992487	3205	{
adrevong	0:8b2a15992487	3206	FRESULT res;
adrevong	0:8b2a15992487	3207	FATFS* fs;
adrevong	0:8b2a15992487	3208	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3209
adrevong	0:8b2a15992487	3210
adrevong	0:8b2a15992487	3211	if (!dp) return FR_INVALID_OBJECT;
adrevong	0:8b2a15992487	3212
adrevong	0:8b2a15992487	3213	/* Get logical drive number */
adrevong	0:8b2a15992487	3214	res = find_volume(&fs, &path, 0);
adrevong	0:8b2a15992487	3215	if (res == FR_OK) {
adrevong	0:8b2a15992487	3216	dp->fs = fs;
adrevong	0:8b2a15992487	3217	INIT_BUF(*dp);
adrevong	0:8b2a15992487	3218	res = follow_path(dp, path); /* Follow the path to the directory */
adrevong	0:8b2a15992487	3219	FREE_BUF();
adrevong	0:8b2a15992487	3220	if (res == FR_OK) { /* Follow completed */
adrevong	0:8b2a15992487	3221	if (dp->dir) { /* It is not the origin directory itself */
adrevong	0:8b2a15992487	3222	if (dp->dir[DIR_Attr] & AM_DIR) /* The object is a sub directory */
adrevong	0:8b2a15992487	3223	dp->sclust = ld_clust(fs, dp->dir);
adrevong	0:8b2a15992487	3224	else /* The object is a file */
adrevong	0:8b2a15992487	3225	res = FR_NO_PATH;
adrevong	0:8b2a15992487	3226	}
adrevong	0:8b2a15992487	3227	if (res == FR_OK) {
adrevong	0:8b2a15992487	3228	dp->id = fs->id;
adrevong	0:8b2a15992487	3229	res = dir_sdi(dp, 0); /* Rewind directory */
adrevong	0:8b2a15992487	3230	#if _FS_LOCK
adrevong	0:8b2a15992487	3231	if (res == FR_OK) {
adrevong	0:8b2a15992487	3232	if (dp->sclust) {
adrevong	0:8b2a15992487	3233	dp->lockid = inc_lock(dp, 0); /* Lock the sub directory */
adrevong	0:8b2a15992487	3234	if (!dp->lockid)
adrevong	0:8b2a15992487	3235	res = FR_TOO_MANY_OPEN_FILES;
adrevong	0:8b2a15992487	3236	} else {
adrevong	0:8b2a15992487	3237	dp->lockid = 0; /* Root directory need not to be locked */
adrevong	0:8b2a15992487	3238	}
adrevong	0:8b2a15992487	3239	}
adrevong	0:8b2a15992487	3240	#endif
adrevong	0:8b2a15992487	3241	}
adrevong	0:8b2a15992487	3242	}
adrevong	0:8b2a15992487	3243	if (res == FR_NO_FILE) res = FR_NO_PATH;
adrevong	0:8b2a15992487	3244	}
adrevong	0:8b2a15992487	3245	if (res != FR_OK) dp->fs = 0; /* Invalidate the directory object if function faild */
adrevong	0:8b2a15992487	3246
adrevong	0:8b2a15992487	3247	LEAVE_FF(fs, res);
adrevong	0:8b2a15992487	3248	}
adrevong	0:8b2a15992487	3249
adrevong	0:8b2a15992487	3250
adrevong	0:8b2a15992487	3251
adrevong	0:8b2a15992487	3252
adrevong	0:8b2a15992487	3253	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3254	/* Close Directory */
adrevong	0:8b2a15992487	3255	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3256
adrevong	0:8b2a15992487	3257	FRESULT f_closedir (
adrevong	0:8b2a15992487	3258	FATFS_DIR dp / Pointer to the directory object to be closed */
adrevong	0:8b2a15992487	3259	)
adrevong	0:8b2a15992487	3260	{
adrevong	0:8b2a15992487	3261	FRESULT res;
adrevong	0:8b2a15992487	3262
adrevong	0:8b2a15992487	3263
adrevong	0:8b2a15992487	3264	res = validate(dp);
adrevong	0:8b2a15992487	3265	if (res == FR_OK) {
adrevong	0:8b2a15992487	3266	#if _FS_REENTRANT
adrevong	0:8b2a15992487	3267	FATFS *fs = dp->fs;
adrevong	0:8b2a15992487	3268	#endif
adrevong	0:8b2a15992487	3269	#if _FS_LOCK
adrevong	0:8b2a15992487	3270	if (dp->lockid) /* Decrement sub-directory open counter */
adrevong	0:8b2a15992487	3271	res = dec_lock(dp->lockid);
adrevong	0:8b2a15992487	3272	if (res == FR_OK)
adrevong	0:8b2a15992487	3273	#endif
adrevong	0:8b2a15992487	3274	dp->fs = 0; /* Invalidate directory object */
adrevong	0:8b2a15992487	3275	#if _FS_REENTRANT
adrevong	0:8b2a15992487	3276	unlock_fs(fs, FR_OK); /* Unlock volume */
adrevong	0:8b2a15992487	3277	#endif
adrevong	0:8b2a15992487	3278	}
adrevong	0:8b2a15992487	3279	return res;
adrevong	0:8b2a15992487	3280	}
adrevong	0:8b2a15992487	3281
adrevong	0:8b2a15992487	3282
adrevong	0:8b2a15992487	3283
adrevong	0:8b2a15992487	3284
adrevong	0:8b2a15992487	3285	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3286	/* Read Directory Entries in Sequence */
adrevong	0:8b2a15992487	3287	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3288
adrevong	0:8b2a15992487	3289	FRESULT f_readdir (
adrevong	0:8b2a15992487	3290	FATFS_DIR* dp, /* Pointer to the open directory object */
adrevong	0:8b2a15992487	3291	FILINFO* fno /* Pointer to file information to return */
adrevong	0:8b2a15992487	3292	)
adrevong	0:8b2a15992487	3293	{
adrevong	0:8b2a15992487	3294	FRESULT res;
adrevong	0:8b2a15992487	3295	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3296
adrevong	0:8b2a15992487	3297
adrevong	0:8b2a15992487	3298	res = validate(dp); /* Check validity of the object */
adrevong	0:8b2a15992487	3299	if (res == FR_OK) {
adrevong	0:8b2a15992487	3300	if (!fno) {
adrevong	0:8b2a15992487	3301	res = dir_sdi(dp, 0); /* Rewind the directory object */
adrevong	0:8b2a15992487	3302	} else {
adrevong	0:8b2a15992487	3303	INIT_BUF(*dp);
adrevong	0:8b2a15992487	3304	res = dir_read(dp, 0); /* Read an item */
adrevong	0:8b2a15992487	3305	if (res == FR_NO_FILE) { /* Reached end of directory */
adrevong	0:8b2a15992487	3306	dp->sect = 0;
adrevong	0:8b2a15992487	3307	res = FR_OK;
adrevong	0:8b2a15992487	3308	}
adrevong	0:8b2a15992487	3309	if (res == FR_OK) { /* A valid entry is found */
adrevong	0:8b2a15992487	3310	get_fileinfo(dp, fno); /* Get the object information */
adrevong	0:8b2a15992487	3311	res = dir_next(dp, 0); /* Increment index for next */
adrevong	0:8b2a15992487	3312	if (res == FR_NO_FILE) {
adrevong	0:8b2a15992487	3313	dp->sect = 0;
adrevong	0:8b2a15992487	3314	res = FR_OK;
adrevong	0:8b2a15992487	3315	}
adrevong	0:8b2a15992487	3316	}
adrevong	0:8b2a15992487	3317	FREE_BUF();
adrevong	0:8b2a15992487	3318	}
adrevong	0:8b2a15992487	3319	}
adrevong	0:8b2a15992487	3320
adrevong	0:8b2a15992487	3321	LEAVE_FF(dp->fs, res);
adrevong	0:8b2a15992487	3322	}
adrevong	0:8b2a15992487	3323
adrevong	0:8b2a15992487	3324
adrevong	0:8b2a15992487	3325
adrevong	0:8b2a15992487	3326	#if _USE_FIND
adrevong	0:8b2a15992487	3327	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3328	/* Find next file */
adrevong	0:8b2a15992487	3329	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3330
adrevong	0:8b2a15992487	3331	FRESULT f_findnext (
adrevong	0:8b2a15992487	3332	FATFS_DIR* dp, /* Pointer to the open directory object */
adrevong	0:8b2a15992487	3333	FILINFO* fno /* Pointer to the file information structure */
adrevong	0:8b2a15992487	3334	)
adrevong	0:8b2a15992487	3335	{
adrevong	0:8b2a15992487	3336	FRESULT res;
adrevong	0:8b2a15992487	3337
adrevong	0:8b2a15992487	3338
adrevong	0:8b2a15992487	3339	for (;;) {
adrevong	0:8b2a15992487	3340	res = f_readdir(dp, fno); /* Get a directory item */
adrevong	0:8b2a15992487	3341	if (res != FR_OK \|\| !fno \|\| !fno->fname[0]) break; /* Terminate if any error or end of directory */
adrevong	0:8b2a15992487	3342	#if _USE_LFN
adrevong	0:8b2a15992487	3343	if (fno->lfname && pattern_matching(dp->pat, fno->lfname, 0, 0)) break; /* Test for LFN if exist */
adrevong	0:8b2a15992487	3344	#endif
adrevong	0:8b2a15992487	3345	if (pattern_matching(dp->pat, fno->fname, 0, 0)) break; /* Test for SFN */
adrevong	0:8b2a15992487	3346	}
adrevong	0:8b2a15992487	3347	return res;
adrevong	0:8b2a15992487	3348
adrevong	0:8b2a15992487	3349	}
adrevong	0:8b2a15992487	3350
adrevong	0:8b2a15992487	3351
adrevong	0:8b2a15992487	3352
adrevong	0:8b2a15992487	3353	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3354	/* Find first file */
adrevong	0:8b2a15992487	3355	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3356
adrevong	0:8b2a15992487	3357	FRESULT f_findfirst (
adrevong	0:8b2a15992487	3358	FATFS_DIR* dp, /* Pointer to the blank directory object */
adrevong	0:8b2a15992487	3359	FILINFO* fno, /* Pointer to the file information structure */
adrevong	0:8b2a15992487	3360	const TCHAR* path, /* Pointer to the directory to open */
adrevong	0:8b2a15992487	3361	const TCHAR* pattern /* Pointer to the matching pattern */
adrevong	0:8b2a15992487	3362	)
adrevong	0:8b2a15992487	3363	{
adrevong	0:8b2a15992487	3364	FRESULT res;
adrevong	0:8b2a15992487	3365
adrevong	0:8b2a15992487	3366
adrevong	0:8b2a15992487	3367	dp->pat = pattern; /* Save pointer to pattern string */
adrevong	0:8b2a15992487	3368	res = f_opendir(dp, path); /* Open the target directory */
adrevong	0:8b2a15992487	3369	if (res == FR_OK)
adrevong	0:8b2a15992487	3370	res = f_findnext(dp, fno); /* Find the first item */
adrevong	0:8b2a15992487	3371	return res;
adrevong	0:8b2a15992487	3372	}
adrevong	0:8b2a15992487	3373
adrevong	0:8b2a15992487	3374	#endif /* _USE_FIND */
adrevong	0:8b2a15992487	3375
adrevong	0:8b2a15992487	3376
adrevong	0:8b2a15992487	3377
adrevong	0:8b2a15992487	3378	#if _FS_MINIMIZE == 0
adrevong	0:8b2a15992487	3379	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3380	/* Get File Status */
adrevong	0:8b2a15992487	3381	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3382
adrevong	0:8b2a15992487	3383	FRESULT f_stat (
adrevong	0:8b2a15992487	3384	const TCHAR* path, /* Pointer to the file path */
adrevong	0:8b2a15992487	3385	FILINFO* fno /* Pointer to file information to return */
adrevong	0:8b2a15992487	3386	)
adrevong	0:8b2a15992487	3387	{
adrevong	0:8b2a15992487	3388	FRESULT res;
adrevong	0:8b2a15992487	3389	FATFS_DIR dj;
adrevong	0:8b2a15992487	3390	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3391
adrevong	0:8b2a15992487	3392
adrevong	0:8b2a15992487	3393	/* Get logical drive number */
adrevong	0:8b2a15992487	3394	res = find_volume(&dj.fs, &path, 0);
adrevong	0:8b2a15992487	3395	if (res == FR_OK) {
adrevong	0:8b2a15992487	3396	INIT_BUF(dj);
adrevong	0:8b2a15992487	3397	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	3398	if (res == FR_OK) { /* Follow completed */
adrevong	0:8b2a15992487	3399	if (dj.dir) { /* Found an object */
adrevong	0:8b2a15992487	3400	if (fno) get_fileinfo(&dj, fno);
adrevong	0:8b2a15992487	3401	} else { /* It is root directory */
adrevong	0:8b2a15992487	3402	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3403	}
adrevong	0:8b2a15992487	3404	}
adrevong	0:8b2a15992487	3405	FREE_BUF();
adrevong	0:8b2a15992487	3406	}
adrevong	0:8b2a15992487	3407
adrevong	0:8b2a15992487	3408	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3409	}
adrevong	0:8b2a15992487	3410
adrevong	0:8b2a15992487	3411
adrevong	0:8b2a15992487	3412
adrevong	0:8b2a15992487	3413	#if !_FS_READONLY
adrevong	0:8b2a15992487	3414	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3415	/* Get Number of Free Clusters */
adrevong	0:8b2a15992487	3416	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3417
adrevong	0:8b2a15992487	3418	FRESULT f_getfree (
adrevong	0:8b2a15992487	3419	const TCHAR* path, /* Path name of the logical drive number */
adrevong	0:8b2a15992487	3420	DWORD* nclst, /* Pointer to a variable to return number of free clusters */
adrevong	0:8b2a15992487	3421	FATFS** fatfs /* Pointer to return pointer to corresponding file system object */
adrevong	0:8b2a15992487	3422	)
adrevong	0:8b2a15992487	3423	{
adrevong	0:8b2a15992487	3424	FRESULT res;
adrevong	0:8b2a15992487	3425	FATFS *fs;
adrevong	0:8b2a15992487	3426	DWORD nfree, clst, sect, stat;
adrevong	0:8b2a15992487	3427	UINT i;
adrevong	0:8b2a15992487	3428	BYTE fat, *p;
adrevong	0:8b2a15992487	3429
adrevong	0:8b2a15992487	3430
adrevong	0:8b2a15992487	3431	/* Get logical drive number */
adrevong	0:8b2a15992487	3432	res = find_volume(fatfs, &path, 0);
adrevong	0:8b2a15992487	3433	fs = *fatfs;
adrevong	0:8b2a15992487	3434	if (res == FR_OK) {
adrevong	0:8b2a15992487	3435	/* If free_clust is valid, return it without full cluster scan */
adrevong	0:8b2a15992487	3436	if (fs->free_clust <= fs->n_fatent - 2) {
adrevong	0:8b2a15992487	3437	*nclst = fs->free_clust;
adrevong	0:8b2a15992487	3438	} else {
adrevong	0:8b2a15992487	3439	/* Get number of free clusters */
adrevong	0:8b2a15992487	3440	fat = fs->fs_type;
adrevong	0:8b2a15992487	3441	nfree = 0;
adrevong	0:8b2a15992487	3442	if (fat == FS_FAT12) { /* Sector unalighed entries: Search FAT via regular routine. */
adrevong	0:8b2a15992487	3443	clst = 2;
adrevong	0:8b2a15992487	3444	do {
adrevong	0:8b2a15992487	3445	stat = get_fat(fs, clst);
adrevong	0:8b2a15992487	3446	if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
adrevong	0:8b2a15992487	3447	if (stat == 1) { res = FR_INT_ERR; break; }
adrevong	0:8b2a15992487	3448	if (stat == 0) nfree++;
adrevong	0:8b2a15992487	3449	} while (++clst < fs->n_fatent);
adrevong	0:8b2a15992487	3450	} else { /* Sector alighed entries: Accelerate the FAT search. */
adrevong	0:8b2a15992487	3451	clst = fs->n_fatent; sect = fs->fatbase;
adrevong	0:8b2a15992487	3452	i = 0; p = 0;
adrevong	0:8b2a15992487	3453	do {
adrevong	0:8b2a15992487	3454	if (!i) {
adrevong	0:8b2a15992487	3455	res = move_window(fs, sect++);
adrevong	0:8b2a15992487	3456	if (res != FR_OK) break;
adrevong	0:8b2a15992487	3457	p = fs->win;
adrevong	0:8b2a15992487	3458	i = SS(fs);
adrevong	0:8b2a15992487	3459	}
adrevong	0:8b2a15992487	3460	if (fat == FS_FAT16) {
adrevong	0:8b2a15992487	3461	if (LD_WORD(p) == 0) nfree++;
adrevong	0:8b2a15992487	3462	p += 2; i -= 2;
adrevong	0:8b2a15992487	3463	} else {
adrevong	0:8b2a15992487	3464	if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) nfree++;
adrevong	0:8b2a15992487	3465	p += 4; i -= 4;
adrevong	0:8b2a15992487	3466	}
adrevong	0:8b2a15992487	3467	} while (--clst);
adrevong	0:8b2a15992487	3468	}
adrevong	0:8b2a15992487	3469	fs->free_clust = nfree; /* free_clust is valid */
adrevong	0:8b2a15992487	3470	fs->fsi_flag \|= 1; /* FSInfo is to be updated */
adrevong	0:8b2a15992487	3471	nclst = nfree; / Return the free clusters */
adrevong	0:8b2a15992487	3472	}
adrevong	0:8b2a15992487	3473	}
adrevong	0:8b2a15992487	3474	LEAVE_FF(fs, res);
adrevong	0:8b2a15992487	3475	}
adrevong	0:8b2a15992487	3476
adrevong	0:8b2a15992487	3477
adrevong	0:8b2a15992487	3478
adrevong	0:8b2a15992487	3479
adrevong	0:8b2a15992487	3480	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3481	/* Truncate File */
adrevong	0:8b2a15992487	3482	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3483
adrevong	0:8b2a15992487	3484	FRESULT f_truncate (
adrevong	0:8b2a15992487	3485	FIL* fp /* Pointer to the file object */
adrevong	0:8b2a15992487	3486	)
adrevong	0:8b2a15992487	3487	{
adrevong	0:8b2a15992487	3488	FRESULT res;
adrevong	0:8b2a15992487	3489	DWORD ncl;
adrevong	0:8b2a15992487	3490
adrevong	0:8b2a15992487	3491
adrevong	0:8b2a15992487	3492	res = validate(fp); /* Check validity of the object */
adrevong	0:8b2a15992487	3493	if (res == FR_OK) {
adrevong	0:8b2a15992487	3494	if (fp->err) { /* Check error */
adrevong	0:8b2a15992487	3495	res = (FRESULT)fp->err;
adrevong	0:8b2a15992487	3496	} else {
adrevong	0:8b2a15992487	3497	if (!(fp->flag & FA_WRITE)) /* Check access mode */
adrevong	0:8b2a15992487	3498	res = FR_DENIED;
adrevong	0:8b2a15992487	3499	}
adrevong	0:8b2a15992487	3500	}
adrevong	0:8b2a15992487	3501	if (res == FR_OK) {
adrevong	0:8b2a15992487	3502	if (fp->fsize > fp->fptr) {
adrevong	0:8b2a15992487	3503	fp->fsize = fp->fptr; /* Set file size to current R/W point */
adrevong	0:8b2a15992487	3504	fp->flag \|= FA__WRITTEN;
adrevong	0:8b2a15992487	3505	if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
adrevong	0:8b2a15992487	3506	res = remove_chain(fp->fs, fp->sclust);
adrevong	0:8b2a15992487	3507	fp->sclust = 0;
adrevong	0:8b2a15992487	3508	} else { /* When truncate a part of the file, remove remaining clusters */
adrevong	0:8b2a15992487	3509	ncl = get_fat(fp->fs, fp->clust);
adrevong	0:8b2a15992487	3510	res = FR_OK;
adrevong	0:8b2a15992487	3511	if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
adrevong	0:8b2a15992487	3512	if (ncl == 1) res = FR_INT_ERR;
adrevong	0:8b2a15992487	3513	if (res == FR_OK && ncl < fp->fs->n_fatent) {
adrevong	0:8b2a15992487	3514	res = put_fat(fp->fs, fp->clust, 0x0FFFFFFF);
adrevong	0:8b2a15992487	3515	if (res == FR_OK) res = remove_chain(fp->fs, ncl);
adrevong	0:8b2a15992487	3516	}
adrevong	0:8b2a15992487	3517	}
adrevong	0:8b2a15992487	3518	#if !_FS_TINY
adrevong	0:8b2a15992487	3519	if (res == FR_OK && (fp->flag & FA__DIRTY)) {
adrevong	0:8b2a15992487	3520	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
adrevong	0:8b2a15992487	3521	res = FR_DISK_ERR;
adrevong	0:8b2a15992487	3522	else
adrevong	0:8b2a15992487	3523	fp->flag &= ~FA__DIRTY;
adrevong	0:8b2a15992487	3524	}
adrevong	0:8b2a15992487	3525	#endif
adrevong	0:8b2a15992487	3526	}
adrevong	0:8b2a15992487	3527	if (res != FR_OK) fp->err = (FRESULT)res;
adrevong	0:8b2a15992487	3528	}
adrevong	0:8b2a15992487	3529
adrevong	0:8b2a15992487	3530	LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	3531	}
adrevong	0:8b2a15992487	3532
adrevong	0:8b2a15992487	3533
adrevong	0:8b2a15992487	3534
adrevong	0:8b2a15992487	3535
adrevong	0:8b2a15992487	3536	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3537	/* Delete a File or Directory */
adrevong	0:8b2a15992487	3538	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3539
adrevong	0:8b2a15992487	3540	FRESULT f_unlink (
adrevong	0:8b2a15992487	3541	const TCHAR* path /* Pointer to the file or directory path */
adrevong	0:8b2a15992487	3542	)
adrevong	0:8b2a15992487	3543	{
adrevong	0:8b2a15992487	3544	FRESULT res;
adrevong	0:8b2a15992487	3545	FATFS_DIR dj, sdj;
adrevong	0:8b2a15992487	3546	BYTE *dir;
adrevong	0:8b2a15992487	3547	DWORD dclst = 0;
adrevong	0:8b2a15992487	3548	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3549
adrevong	0:8b2a15992487	3550
adrevong	0:8b2a15992487	3551	/* Get logical drive number */
adrevong	0:8b2a15992487	3552	res = find_volume(&dj.fs, &path, 1);
adrevong	0:8b2a15992487	3553	if (res == FR_OK) {
adrevong	0:8b2a15992487	3554	INIT_BUF(dj);
adrevong	0:8b2a15992487	3555	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	3556	if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
adrevong	0:8b2a15992487	3557	res = FR_INVALID_NAME; /* Cannot remove dot entry */
adrevong	0:8b2a15992487	3558	#if _FS_LOCK
adrevong	0:8b2a15992487	3559	if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open object */
adrevong	0:8b2a15992487	3560	#endif
adrevong	0:8b2a15992487	3561	if (res == FR_OK) { /* The object is accessible */
adrevong	0:8b2a15992487	3562	dir = dj.dir;
adrevong	0:8b2a15992487	3563	if (!dir) {
adrevong	0:8b2a15992487	3564	res = FR_INVALID_NAME; /* Cannot remove the origin directory */
adrevong	0:8b2a15992487	3565	} else {
adrevong	0:8b2a15992487	3566	if (dir[DIR_Attr] & AM_RDO)
adrevong	0:8b2a15992487	3567	res = FR_DENIED; /* Cannot remove R/O object */
adrevong	0:8b2a15992487	3568	}
adrevong	0:8b2a15992487	3569	if (res == FR_OK) {
adrevong	0:8b2a15992487	3570	dclst = ld_clust(dj.fs, dir);
adrevong	0:8b2a15992487	3571	if (dclst && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-directory ? */
adrevong	0:8b2a15992487	3572	#if _FS_RPATH
adrevong	0:8b2a15992487	3573	if (dclst == dj.fs->cdir) { /* Is it the current directory? */
adrevong	0:8b2a15992487	3574	res = FR_DENIED;
adrevong	0:8b2a15992487	3575	} else
adrevong	0:8b2a15992487	3576	#endif
adrevong	0:8b2a15992487	3577	{
adrevong	0:8b2a15992487	3578	mem_cpy(&sdj, &dj, sizeof (FATFS_DIR)); /* Open the sub-directory */
adrevong	0:8b2a15992487	3579	sdj.sclust = dclst;
adrevong	0:8b2a15992487	3580	res = dir_sdi(&sdj, 2);
adrevong	0:8b2a15992487	3581	if (res == FR_OK) {
adrevong	0:8b2a15992487	3582	res = dir_read(&sdj, 0); /* Read an item (excluding dot entries) */
adrevong	0:8b2a15992487	3583	if (res == FR_OK) res = FR_DENIED; /* Not empty? (cannot remove) */
adrevong	0:8b2a15992487	3584	if (res == FR_NO_FILE) res = FR_OK; /* Empty? (can remove) */
adrevong	0:8b2a15992487	3585	}
adrevong	0:8b2a15992487	3586	}
adrevong	0:8b2a15992487	3587	}
adrevong	0:8b2a15992487	3588	}
adrevong	0:8b2a15992487	3589	if (res == FR_OK) {
adrevong	0:8b2a15992487	3590	res = dir_remove(&dj); /* Remove the directory entry */
adrevong	0:8b2a15992487	3591	if (res == FR_OK && dclst) /* Remove the cluster chain if exist */
adrevong	0:8b2a15992487	3592	res = remove_chain(dj.fs, dclst);
adrevong	0:8b2a15992487	3593	if (res == FR_OK) res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3594	}
adrevong	0:8b2a15992487	3595	}
adrevong	0:8b2a15992487	3596	FREE_BUF();
adrevong	0:8b2a15992487	3597	}
adrevong	0:8b2a15992487	3598
adrevong	0:8b2a15992487	3599	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3600	}
adrevong	0:8b2a15992487	3601
adrevong	0:8b2a15992487	3602
adrevong	0:8b2a15992487	3603
adrevong	0:8b2a15992487	3604
adrevong	0:8b2a15992487	3605	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3606	/* Create a Directory */
adrevong	0:8b2a15992487	3607	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3608
adrevong	0:8b2a15992487	3609	FRESULT f_mkdir (
adrevong	0:8b2a15992487	3610	const TCHAR* path /* Pointer to the directory path */
adrevong	0:8b2a15992487	3611	)
adrevong	0:8b2a15992487	3612	{
adrevong	0:8b2a15992487	3613	FRESULT res;
adrevong	0:8b2a15992487	3614	FATFS_DIR dj;
adrevong	0:8b2a15992487	3615	BYTE *dir, n;
adrevong	0:8b2a15992487	3616	DWORD dsc, dcl, pcl, tm = GET_FATTIME();
adrevong	0:8b2a15992487	3617	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3618
adrevong	0:8b2a15992487	3619
adrevong	0:8b2a15992487	3620	/* Get logical drive number */
adrevong	0:8b2a15992487	3621	res = find_volume(&dj.fs, &path, 1);
adrevong	0:8b2a15992487	3622	if (res == FR_OK) {
adrevong	0:8b2a15992487	3623	INIT_BUF(dj);
adrevong	0:8b2a15992487	3624	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	3625	if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
adrevong	0:8b2a15992487	3626	if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NSFLAG] & NS_DOT))
adrevong	0:8b2a15992487	3627	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3628	if (res == FR_NO_FILE) { /* Can create a new directory */
adrevong	0:8b2a15992487	3629	dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
adrevong	0:8b2a15992487	3630	res = FR_OK;
adrevong	0:8b2a15992487	3631	if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
adrevong	0:8b2a15992487	3632	if (dcl == 1) res = FR_INT_ERR;
adrevong	0:8b2a15992487	3633	if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
adrevong	0:8b2a15992487	3634	if (res == FR_OK) /* Flush FAT */
adrevong	0:8b2a15992487	3635	res = sync_window(dj.fs);
adrevong	0:8b2a15992487	3636	if (res == FR_OK) { /* Initialize the new directory table */
adrevong	0:8b2a15992487	3637	dsc = clust2sect(dj.fs, dcl);
adrevong	0:8b2a15992487	3638	dir = dj.fs->win;
adrevong	0:8b2a15992487	3639	mem_set(dir, 0, SS(dj.fs));
adrevong	0:8b2a15992487	3640	mem_set(dir + DIR_Name, ' ', 11); /* Create "." entry */
adrevong	0:8b2a15992487	3641	dir[DIR_Name] = '.';
adrevong	0:8b2a15992487	3642	dir[DIR_Attr] = AM_DIR;
adrevong	0:8b2a15992487	3643	ST_DWORD(dir + DIR_WrtTime, tm);
adrevong	0:8b2a15992487	3644	st_clust(dir, dcl);
adrevong	0:8b2a15992487	3645	mem_cpy(dir + SZ_DIRE, dir, SZ_DIRE); /* Create ".." entry */
adrevong	0:8b2a15992487	3646	dir[SZ_DIRE + 1] = '.'; pcl = dj.sclust;
adrevong	0:8b2a15992487	3647	if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
adrevong	0:8b2a15992487	3648	pcl = 0;
adrevong	0:8b2a15992487	3649	st_clust(dir + SZ_DIRE, pcl);
adrevong	0:8b2a15992487	3650	for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
adrevong	0:8b2a15992487	3651	dj.fs->winsect = dsc++;
adrevong	0:8b2a15992487	3652	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3653	res = sync_window(dj.fs);
adrevong	0:8b2a15992487	3654	if (res != FR_OK) break;
adrevong	0:8b2a15992487	3655	mem_set(dir, 0, SS(dj.fs));
adrevong	0:8b2a15992487	3656	}
adrevong	0:8b2a15992487	3657	}
adrevong	0:8b2a15992487	3658	if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
adrevong	0:8b2a15992487	3659	if (res != FR_OK) {
adrevong	0:8b2a15992487	3660	remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
adrevong	0:8b2a15992487	3661	} else {
adrevong	0:8b2a15992487	3662	dir = dj.dir;
adrevong	0:8b2a15992487	3663	dir[DIR_Attr] = AM_DIR; /* Attribute */
adrevong	0:8b2a15992487	3664	ST_DWORD(dir + DIR_WrtTime, tm); /* Created time */
adrevong	0:8b2a15992487	3665	st_clust(dir, dcl); /* Table start cluster */
adrevong	0:8b2a15992487	3666	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3667	res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3668	}
adrevong	0:8b2a15992487	3669	}
adrevong	0:8b2a15992487	3670	FREE_BUF();
adrevong	0:8b2a15992487	3671	}
adrevong	0:8b2a15992487	3672
adrevong	0:8b2a15992487	3673	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3674	}
adrevong	0:8b2a15992487	3675
adrevong	0:8b2a15992487	3676
adrevong	0:8b2a15992487	3677
adrevong	0:8b2a15992487	3678
adrevong	0:8b2a15992487	3679	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3680	/* Change Attribute */
adrevong	0:8b2a15992487	3681	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3682
adrevong	0:8b2a15992487	3683	FRESULT f_chmod (
adrevong	0:8b2a15992487	3684	const TCHAR* path, /* Pointer to the file path */
adrevong	0:8b2a15992487	3685	BYTE attr, /* Attribute bits */
adrevong	0:8b2a15992487	3686	BYTE mask /* Attribute mask to change */
adrevong	0:8b2a15992487	3687	)
adrevong	0:8b2a15992487	3688	{
adrevong	0:8b2a15992487	3689	FRESULT res;
adrevong	0:8b2a15992487	3690	FATFS_DIR dj;
adrevong	0:8b2a15992487	3691	BYTE *dir;
adrevong	0:8b2a15992487	3692	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3693
adrevong	0:8b2a15992487	3694
adrevong	0:8b2a15992487	3695	res = find_volume(&dj.fs, &path, 1); /* Get logical drive number */
adrevong	0:8b2a15992487	3696	if (res == FR_OK) {
adrevong	0:8b2a15992487	3697	INIT_BUF(dj);
adrevong	0:8b2a15992487	3698	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	3699	FREE_BUF();
adrevong	0:8b2a15992487	3700	if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
adrevong	0:8b2a15992487	3701	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3702	if (res == FR_OK) {
adrevong	0:8b2a15992487	3703	dir = dj.dir;
adrevong	0:8b2a15992487	3704	if (!dir) { /* Is it a root directory? */
adrevong	0:8b2a15992487	3705	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3706	} else { /* File or sub directory */
adrevong	0:8b2a15992487	3707	mask &= AM_RDO\|AM_HID\|AM_SYS\|AM_ARC; /* Valid attribute mask */
adrevong	0:8b2a15992487	3708	dir[DIR_Attr] = (attr & mask) \| (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
adrevong	0:8b2a15992487	3709	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3710	res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3711	}
adrevong	0:8b2a15992487	3712	}
adrevong	0:8b2a15992487	3713	}
adrevong	0:8b2a15992487	3714
adrevong	0:8b2a15992487	3715	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3716	}
adrevong	0:8b2a15992487	3717
adrevong	0:8b2a15992487	3718
adrevong	0:8b2a15992487	3719
adrevong	0:8b2a15992487	3720
adrevong	0:8b2a15992487	3721	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3722	/* Rename File/Directory */
adrevong	0:8b2a15992487	3723	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3724
adrevong	0:8b2a15992487	3725	FRESULT f_rename (
adrevong	0:8b2a15992487	3726	const TCHAR* path_old, /* Pointer to the object to be renamed */
adrevong	0:8b2a15992487	3727	const TCHAR* path_new /* Pointer to the new name */
adrevong	0:8b2a15992487	3728	)
adrevong	0:8b2a15992487	3729	{
adrevong	0:8b2a15992487	3730	FRESULT res;
adrevong	0:8b2a15992487	3731	FATFS_DIR djo, djn;
adrevong	0:8b2a15992487	3732	BYTE buf[21], *dir;
adrevong	0:8b2a15992487	3733	DWORD dw;
adrevong	0:8b2a15992487	3734	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3735
adrevong	0:8b2a15992487	3736
adrevong	0:8b2a15992487	3737	/* Get logical drive number of the source object */
adrevong	0:8b2a15992487	3738	res = find_volume(&djo.fs, &path_old, 1);
adrevong	0:8b2a15992487	3739	if (res == FR_OK) {
adrevong	0:8b2a15992487	3740	djn.fs = djo.fs;
adrevong	0:8b2a15992487	3741	INIT_BUF(djo);
adrevong	0:8b2a15992487	3742	res = follow_path(&djo, path_old); /* Check old object */
adrevong	0:8b2a15992487	3743	if (_FS_RPATH && res == FR_OK && (djo.fn[NSFLAG] & NS_DOT))
adrevong	0:8b2a15992487	3744	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3745	#if _FS_LOCK
adrevong	0:8b2a15992487	3746	if (res == FR_OK) res = chk_lock(&djo, 2);
adrevong	0:8b2a15992487	3747	#endif
adrevong	0:8b2a15992487	3748	if (res == FR_OK) { /* Old object is found */
adrevong	0:8b2a15992487	3749	if (!djo.dir) { /* Is root dir? */
adrevong	0:8b2a15992487	3750	res = FR_NO_FILE;
adrevong	0:8b2a15992487	3751	} else {
adrevong	0:8b2a15992487	3752	mem_cpy(buf, djo.dir + DIR_Attr, 21); /* Save information about object except name */
adrevong	0:8b2a15992487	3753	mem_cpy(&djn, &djo, sizeof (FATFS_DIR)); /* Duplicate the directory object */
adrevong	0:8b2a15992487	3754	if (get_ldnumber(&path_new) >= 0) /* Snip drive number off and ignore it */
adrevong	0:8b2a15992487	3755	res = follow_path(&djn, path_new); /* and make sure if new object name is not conflicting */
adrevong	0:8b2a15992487	3756	else
adrevong	0:8b2a15992487	3757	res = FR_INVALID_DRIVE;
adrevong	0:8b2a15992487	3758	if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
adrevong	0:8b2a15992487	3759	if (res == FR_NO_FILE) { /* It is a valid path and no name collision */
adrevong	0:8b2a15992487	3760	res = dir_register(&djn); /* Register the new entry */
adrevong	0:8b2a15992487	3761	if (res == FR_OK) {
adrevong	0:8b2a15992487	3762	/* Start of critical section where any interruption can cause a cross-link */
adrevong	0:8b2a15992487	3763	dir = djn.dir; /* Copy information about object except name */
adrevong	0:8b2a15992487	3764	mem_cpy(dir + 13, buf + 2, 19);
adrevong	0:8b2a15992487	3765	dir[DIR_Attr] = buf[0] \| AM_ARC;
adrevong	0:8b2a15992487	3766	djo.fs->wflag = 1;
adrevong	0:8b2a15992487	3767	if ((dir[DIR_Attr] & AM_DIR) && djo.sclust != djn.sclust) { /* Update .. entry in the sub-directory if needed */
adrevong	0:8b2a15992487	3768	dw = clust2sect(djo.fs, ld_clust(djo.fs, dir));
adrevong	0:8b2a15992487	3769	if (!dw) {
adrevong	0:8b2a15992487	3770	res = FR_INT_ERR;
adrevong	0:8b2a15992487	3771	} else {
adrevong	0:8b2a15992487	3772	res = move_window(djo.fs, dw);
adrevong	0:8b2a15992487	3773	dir = djo.fs->win + SZ_DIRE * 1; /* Ptr to .. entry */
adrevong	0:8b2a15992487	3774	if (res == FR_OK && dir[1] == '.') {
adrevong	0:8b2a15992487	3775	st_clust(dir, djn.sclust);
adrevong	0:8b2a15992487	3776	djo.fs->wflag = 1;
adrevong	0:8b2a15992487	3777	}
adrevong	0:8b2a15992487	3778	}
adrevong	0:8b2a15992487	3779	}
adrevong	0:8b2a15992487	3780	if (res == FR_OK) {
adrevong	0:8b2a15992487	3781	res = dir_remove(&djo); /* Remove old entry */
adrevong	0:8b2a15992487	3782	if (res == FR_OK)
adrevong	0:8b2a15992487	3783	res = sync_fs(djo.fs);
adrevong	0:8b2a15992487	3784	}
adrevong	0:8b2a15992487	3785	/* End of critical section */
adrevong	0:8b2a15992487	3786	}
adrevong	0:8b2a15992487	3787	}
adrevong	0:8b2a15992487	3788	}
adrevong	0:8b2a15992487	3789	}
adrevong	0:8b2a15992487	3790	FREE_BUF();
adrevong	0:8b2a15992487	3791	}
adrevong	0:8b2a15992487	3792
adrevong	0:8b2a15992487	3793	LEAVE_FF(djo.fs, res);
adrevong	0:8b2a15992487	3794	}
adrevong	0:8b2a15992487	3795
adrevong	0:8b2a15992487	3796
adrevong	0:8b2a15992487	3797
adrevong	0:8b2a15992487	3798
adrevong	0:8b2a15992487	3799	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3800	/* Change Timestamp */
adrevong	0:8b2a15992487	3801	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3802
adrevong	0:8b2a15992487	3803	FRESULT f_utime (
adrevong	0:8b2a15992487	3804	const TCHAR* path, /* Pointer to the file/directory name */
adrevong	0:8b2a15992487	3805	const FILINFO* fno /* Pointer to the time stamp to be set */
adrevong	0:8b2a15992487	3806	)
adrevong	0:8b2a15992487	3807	{
adrevong	0:8b2a15992487	3808	FRESULT res;
adrevong	0:8b2a15992487	3809	FATFS_DIR dj;
adrevong	0:8b2a15992487	3810	BYTE *dir;
adrevong	0:8b2a15992487	3811	DEFINE_NAMEBUF;
adrevong	0:8b2a15992487	3812
adrevong	0:8b2a15992487	3813
adrevong	0:8b2a15992487	3814	/* Get logical drive number */
adrevong	0:8b2a15992487	3815	res = find_volume(&dj.fs, &path, 1);
adrevong	0:8b2a15992487	3816	if (res == FR_OK) {
adrevong	0:8b2a15992487	3817	INIT_BUF(dj);
adrevong	0:8b2a15992487	3818	res = follow_path(&dj, path); /* Follow the file path */
adrevong	0:8b2a15992487	3819	FREE_BUF();
adrevong	0:8b2a15992487	3820	if (_FS_RPATH && res == FR_OK && (dj.fn[NSFLAG] & NS_DOT))
adrevong	0:8b2a15992487	3821	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3822	if (res == FR_OK) {
adrevong	0:8b2a15992487	3823	dir = dj.dir;
adrevong	0:8b2a15992487	3824	if (!dir) { /* Root directory */
adrevong	0:8b2a15992487	3825	res = FR_INVALID_NAME;
adrevong	0:8b2a15992487	3826	} else { /* File or sub-directory */
adrevong	0:8b2a15992487	3827	ST_WORD(dir + DIR_WrtTime, fno->ftime);
adrevong	0:8b2a15992487	3828	ST_WORD(dir + DIR_WrtDate, fno->fdate);
adrevong	0:8b2a15992487	3829	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3830	res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3831	}
adrevong	0:8b2a15992487	3832	}
adrevong	0:8b2a15992487	3833	}
adrevong	0:8b2a15992487	3834
adrevong	0:8b2a15992487	3835	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3836	}
adrevong	0:8b2a15992487	3837
adrevong	0:8b2a15992487	3838	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	3839	#endif /* _FS_MINIMIZE == 0 */
adrevong	0:8b2a15992487	3840	#endif /* _FS_MINIMIZE <= 1 */
adrevong	0:8b2a15992487	3841	#endif /* _FS_MINIMIZE <= 2 */
adrevong	0:8b2a15992487	3842
adrevong	0:8b2a15992487	3843
adrevong	0:8b2a15992487	3844
adrevong	0:8b2a15992487	3845
adrevong	0:8b2a15992487	3846	#if _USE_LABEL
adrevong	0:8b2a15992487	3847	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3848	/* Get volume label */
adrevong	0:8b2a15992487	3849	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3850
adrevong	0:8b2a15992487	3851	FRESULT f_getlabel (
adrevong	0:8b2a15992487	3852	const TCHAR* path, /* Path name of the logical drive number */
adrevong	0:8b2a15992487	3853	TCHAR* label, /* Pointer to a buffer to return the volume label */
adrevong	0:8b2a15992487	3854	DWORD* vsn /* Pointer to a variable to return the volume serial number */
adrevong	0:8b2a15992487	3855	)
adrevong	0:8b2a15992487	3856	{
adrevong	0:8b2a15992487	3857	FRESULT res;
adrevong	0:8b2a15992487	3858	FATFS_DIR dj;
adrevong	0:8b2a15992487	3859	UINT i, j;
adrevong	0:8b2a15992487	3860	#if _USE_LFN && _LFN_UNICODE
adrevong	0:8b2a15992487	3861	WCHAR w;
adrevong	0:8b2a15992487	3862	#endif
adrevong	0:8b2a15992487	3863
adrevong	0:8b2a15992487	3864
adrevong	0:8b2a15992487	3865	/* Get logical drive number */
adrevong	0:8b2a15992487	3866	res = find_volume(&dj.fs, &path, 0);
adrevong	0:8b2a15992487	3867
adrevong	0:8b2a15992487	3868	/* Get volume label */
adrevong	0:8b2a15992487	3869	if (res == FR_OK && label) {
adrevong	0:8b2a15992487	3870	dj.sclust = 0; /* Open root directory */
adrevong	0:8b2a15992487	3871	res = dir_sdi(&dj, 0);
adrevong	0:8b2a15992487	3872	if (res == FR_OK) {
adrevong	0:8b2a15992487	3873	res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
adrevong	0:8b2a15992487	3874	if (res == FR_OK) { /* A volume label is exist */
adrevong	0:8b2a15992487	3875	#if _USE_LFN && _LFN_UNICODE
adrevong	0:8b2a15992487	3876	i = j = 0;
adrevong	0:8b2a15992487	3877	do {
adrevong	0:8b2a15992487	3878	w = (i < 11) ? dj.dir[i++] : ' ';
adrevong	0:8b2a15992487	3879	if (IsDBCS1(w) && i < 11 && IsDBCS2(dj.dir[i]))
adrevong	0:8b2a15992487	3880	w = w << 8 \| dj.dir[i++];
adrevong	0:8b2a15992487	3881	label[j++] = ff_convert(w, 1); /* OEM -> Unicode */
adrevong	0:8b2a15992487	3882	} while (j < 11);
adrevong	0:8b2a15992487	3883	#else
adrevong	0:8b2a15992487	3884	mem_cpy(label, dj.dir, 11);
adrevong	0:8b2a15992487	3885	#endif
adrevong	0:8b2a15992487	3886	j = 11;
adrevong	0:8b2a15992487	3887	do {
adrevong	0:8b2a15992487	3888	label[j] = 0;
adrevong	0:8b2a15992487	3889	if (!j) break;
adrevong	0:8b2a15992487	3890	} while (label[--j] == ' ');
adrevong	0:8b2a15992487	3891	}
adrevong	0:8b2a15992487	3892	if (res == FR_NO_FILE) { /* No label, return nul string */
adrevong	0:8b2a15992487	3893	label[0] = 0;
adrevong	0:8b2a15992487	3894	res = FR_OK;
adrevong	0:8b2a15992487	3895	}
adrevong	0:8b2a15992487	3896	}
adrevong	0:8b2a15992487	3897	}
adrevong	0:8b2a15992487	3898
adrevong	0:8b2a15992487	3899	/* Get volume serial number */
adrevong	0:8b2a15992487	3900	if (res == FR_OK && vsn) {
adrevong	0:8b2a15992487	3901	res = move_window(dj.fs, dj.fs->volbase);
adrevong	0:8b2a15992487	3902	if (res == FR_OK) {
adrevong	0:8b2a15992487	3903	i = dj.fs->fs_type == FS_FAT32 ? BS_VolID32 : BS_VolID;
adrevong	0:8b2a15992487	3904	*vsn = LD_DWORD(&dj.fs->win[i]);
adrevong	0:8b2a15992487	3905	}
adrevong	0:8b2a15992487	3906	}
adrevong	0:8b2a15992487	3907
adrevong	0:8b2a15992487	3908	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3909	}
adrevong	0:8b2a15992487	3910
adrevong	0:8b2a15992487	3911
adrevong	0:8b2a15992487	3912
adrevong	0:8b2a15992487	3913	#if !_FS_READONLY
adrevong	0:8b2a15992487	3914	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3915	/* Set volume label */
adrevong	0:8b2a15992487	3916	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	3917
adrevong	0:8b2a15992487	3918	FRESULT f_setlabel (
adrevong	0:8b2a15992487	3919	const TCHAR* label /* Pointer to the volume label to set */
adrevong	0:8b2a15992487	3920	)
adrevong	0:8b2a15992487	3921	{
adrevong	0:8b2a15992487	3922	FRESULT res;
adrevong	0:8b2a15992487	3923	FATFS_DIR dj;
adrevong	0:8b2a15992487	3924	BYTE vn[11];
adrevong	0:8b2a15992487	3925	UINT i, j, sl;
adrevong	0:8b2a15992487	3926	WCHAR w;
adrevong	0:8b2a15992487	3927	DWORD tm;
adrevong	0:8b2a15992487	3928
adrevong	0:8b2a15992487	3929
adrevong	0:8b2a15992487	3930	/* Get logical drive number */
adrevong	0:8b2a15992487	3931	res = find_volume(&dj.fs, &label, 1);
adrevong	0:8b2a15992487	3932	if (res) LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	3933
adrevong	0:8b2a15992487	3934	/* Create a volume label in directory form */
adrevong	0:8b2a15992487	3935	vn[0] = 0;
adrevong	0:8b2a15992487	3936	for (sl = 0; label[sl]; sl++) ; /* Get name length */
adrevong	0:8b2a15992487	3937	for ( ; sl && label[sl - 1] == ' '; sl--) ; /* Remove trailing spaces */
adrevong	0:8b2a15992487	3938	if (sl) { /* Create volume label in directory form */
adrevong	0:8b2a15992487	3939	i = j = 0;
adrevong	0:8b2a15992487	3940	do {
adrevong	0:8b2a15992487	3941	#if _USE_LFN && _LFN_UNICODE
adrevong	0:8b2a15992487	3942	w = ff_convert(ff_wtoupper(label[i++]), 0);
adrevong	0:8b2a15992487	3943	#else
adrevong	0:8b2a15992487	3944	w = (BYTE)label[i++];
adrevong	0:8b2a15992487	3945	if (IsDBCS1(w))
adrevong	0:8b2a15992487	3946	w = (j < 10 && i < sl && IsDBCS2(label[i])) ? w << 8 \| (BYTE)label[i++] : 0;
adrevong	0:8b2a15992487	3947	#if _USE_LFN
adrevong	0:8b2a15992487	3948	w = ff_convert(ff_wtoupper(ff_convert(w, 1)), 0);
adrevong	0:8b2a15992487	3949	#else
adrevong	0:8b2a15992487	3950	if (IsLower(w)) w -= 0x20; /* To upper ASCII characters */
adrevong	0:8b2a15992487	3951	#ifdef _EXCVT
adrevong	0:8b2a15992487	3952	if (w >= 0x80) w = ExCvt[w - 0x80]; /* To upper extended characters (SBCS cfg) */
adrevong	0:8b2a15992487	3953	#else
adrevong	0:8b2a15992487	3954	if (!_DF1S && w >= 0x80) w = 0; /* Reject extended characters (ASCII cfg) */
adrevong	0:8b2a15992487	3955	#endif
adrevong	0:8b2a15992487	3956	#endif
adrevong	0:8b2a15992487	3957	#endif
adrevong	0:8b2a15992487	3958	if (!w \|\| chk_chr("\"+,.:;<=>\?[]\|\x7F", w) \|\| j >= (UINT)((w >= 0x100) ? 10 : 11)) / Reject invalid characters for volume label */
adrevong	0:8b2a15992487	3959	LEAVE_FF(dj.fs, FR_INVALID_NAME);
adrevong	0:8b2a15992487	3960	if (w >= 0x100) vn[j++] = (BYTE)(w >> 8);
adrevong	0:8b2a15992487	3961	vn[j++] = (BYTE)w;
adrevong	0:8b2a15992487	3962	} while (i < sl);
adrevong	0:8b2a15992487	3963	while (j < 11) vn[j++] = ' '; /* Fill remaining name field */
adrevong	0:8b2a15992487	3964	if (vn[0] == DDEM) LEAVE_FF(dj.fs, FR_INVALID_NAME); /* Reject illegal name (heading DDEM) */
adrevong	0:8b2a15992487	3965	}
adrevong	0:8b2a15992487	3966
adrevong	0:8b2a15992487	3967	/* Set volume label */
adrevong	0:8b2a15992487	3968	dj.sclust = 0; /* Open root directory */
adrevong	0:8b2a15992487	3969	res = dir_sdi(&dj, 0);
adrevong	0:8b2a15992487	3970	if (res == FR_OK) {
adrevong	0:8b2a15992487	3971	res = dir_read(&dj, 1); /* Get an entry with AM_VOL */
adrevong	0:8b2a15992487	3972	if (res == FR_OK) { /* A volume label is found */
adrevong	0:8b2a15992487	3973	if (vn[0]) {
adrevong	0:8b2a15992487	3974	mem_cpy(dj.dir, vn, 11); /* Change the volume label name */
adrevong	0:8b2a15992487	3975	tm = GET_FATTIME();
adrevong	0:8b2a15992487	3976	ST_DWORD(dj.dir + DIR_WrtTime, tm);
adrevong	0:8b2a15992487	3977	} else {
adrevong	0:8b2a15992487	3978	dj.dir[0] = DDEM; /* Remove the volume label */
adrevong	0:8b2a15992487	3979	}
adrevong	0:8b2a15992487	3980	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3981	res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3982	} else { /* No volume label is found or error */
adrevong	0:8b2a15992487	3983	if (res == FR_NO_FILE) {
adrevong	0:8b2a15992487	3984	res = FR_OK;
adrevong	0:8b2a15992487	3985	if (vn[0]) { /* Create volume label as new */
adrevong	0:8b2a15992487	3986	res = dir_alloc(&dj, 1); /* Allocate an entry for volume label */
adrevong	0:8b2a15992487	3987	if (res == FR_OK) {
adrevong	0:8b2a15992487	3988	mem_set(dj.dir, 0, SZ_DIRE); /* Set volume label */
adrevong	0:8b2a15992487	3989	mem_cpy(dj.dir, vn, 11);
adrevong	0:8b2a15992487	3990	dj.dir[DIR_Attr] = AM_VOL;
adrevong	0:8b2a15992487	3991	tm = GET_FATTIME();
adrevong	0:8b2a15992487	3992	ST_DWORD(dj.dir + DIR_WrtTime, tm);
adrevong	0:8b2a15992487	3993	dj.fs->wflag = 1;
adrevong	0:8b2a15992487	3994	res = sync_fs(dj.fs);
adrevong	0:8b2a15992487	3995	}
adrevong	0:8b2a15992487	3996	}
adrevong	0:8b2a15992487	3997	}
adrevong	0:8b2a15992487	3998	}
adrevong	0:8b2a15992487	3999	}
adrevong	0:8b2a15992487	4000
adrevong	0:8b2a15992487	4001	LEAVE_FF(dj.fs, res);
adrevong	0:8b2a15992487	4002	}
adrevong	0:8b2a15992487	4003
adrevong	0:8b2a15992487	4004	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	4005	#endif /* _USE_LABEL */
adrevong	0:8b2a15992487	4006
adrevong	0:8b2a15992487	4007
adrevong	0:8b2a15992487	4008
adrevong	0:8b2a15992487	4009	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4010	/* Forward data to the stream directly (available on only tiny cfg) */
adrevong	0:8b2a15992487	4011	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4012	#if _USE_FORWARD && _FS_TINY
adrevong	0:8b2a15992487	4013
adrevong	0:8b2a15992487	4014	FRESULT f_forward (
adrevong	0:8b2a15992487	4015	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	4016	UINT (func)(const BYTE,UINT), /* Pointer to the streaming function */
adrevong	0:8b2a15992487	4017	UINT btf, /* Number of bytes to forward */
adrevong	0:8b2a15992487	4018	UINT* bf /* Pointer to number of bytes forwarded */
adrevong	0:8b2a15992487	4019	)
adrevong	0:8b2a15992487	4020	{
adrevong	0:8b2a15992487	4021	FRESULT res;
adrevong	0:8b2a15992487	4022	DWORD remain, clst, sect;
adrevong	0:8b2a15992487	4023	UINT rcnt;
adrevong	0:8b2a15992487	4024	BYTE csect;
adrevong	0:8b2a15992487	4025
adrevong	0:8b2a15992487	4026
adrevong	0:8b2a15992487	4027	bf = 0; / Clear transfer byte counter */
adrevong	0:8b2a15992487	4028
adrevong	0:8b2a15992487	4029	res = validate(fp); /* Check validity of the object */
adrevong	0:8b2a15992487	4030	if (res != FR_OK) LEAVE_FF(fp->fs, res);
adrevong	0:8b2a15992487	4031	if (fp->err) /* Check error */
adrevong	0:8b2a15992487	4032	LEAVE_FF(fp->fs, (FRESULT)fp->err);
adrevong	0:8b2a15992487	4033	if (!(fp->flag & FA_READ)) /* Check access mode */
adrevong	0:8b2a15992487	4034	LEAVE_FF(fp->fs, FR_DENIED);
adrevong	0:8b2a15992487	4035
adrevong	0:8b2a15992487	4036	remain = fp->fsize - fp->fptr;
adrevong	0:8b2a15992487	4037	if (btf > remain) btf = (UINT)remain; /* Truncate btf by remaining bytes */
adrevong	0:8b2a15992487	4038
adrevong	0:8b2a15992487	4039	for ( ; btf && (func)(0, 0); / Repeat until all data transferred or stream becomes busy */
adrevong	0:8b2a15992487	4040	fp->fptr += rcnt, *bf += rcnt, btf -= rcnt) {
adrevong	0:8b2a15992487	4041	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
adrevong	0:8b2a15992487	4042	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
adrevong	0:8b2a15992487	4043	if (!csect) { /* On the cluster boundary? */
adrevong	0:8b2a15992487	4044	clst = (fp->fptr == 0) ? /* On the top of the file? */
adrevong	0:8b2a15992487	4045	fp->sclust : get_fat(fp->fs, fp->clust);
adrevong	0:8b2a15992487	4046	if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	4047	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	4048	fp->clust = clst; /* Update current cluster */
adrevong	0:8b2a15992487	4049	}
adrevong	0:8b2a15992487	4050	}
adrevong	0:8b2a15992487	4051	sect = clust2sect(fp->fs, fp->clust); /* Get current data sector */
adrevong	0:8b2a15992487	4052	if (!sect) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	4053	sect += csect;
adrevong	0:8b2a15992487	4054	if (move_window(fp->fs, sect) != FR_OK) /* Move sector window */
adrevong	0:8b2a15992487	4055	ABORT(fp->fs, FR_DISK_ERR);
adrevong	0:8b2a15992487	4056	fp->dsect = sect;
adrevong	0:8b2a15992487	4057	rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
adrevong	0:8b2a15992487	4058	if (rcnt > btf) rcnt = btf;
adrevong	0:8b2a15992487	4059	rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
adrevong	0:8b2a15992487	4060	if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
adrevong	0:8b2a15992487	4061	}
adrevong	0:8b2a15992487	4062
adrevong	0:8b2a15992487	4063	LEAVE_FF(fp->fs, FR_OK);
adrevong	0:8b2a15992487	4064	}
adrevong	0:8b2a15992487	4065	#endif /* _USE_FORWARD */
adrevong	0:8b2a15992487	4066
adrevong	0:8b2a15992487	4067
adrevong	0:8b2a15992487	4068
adrevong	0:8b2a15992487	4069	#if _USE_MKFS && !_FS_READONLY
adrevong	0:8b2a15992487	4070	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4071	/* Create file system on the logical drive */
adrevong	0:8b2a15992487	4072	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4073	#define N_ROOTDIR 512 /* Number of root directory entries for FAT12/16 */
adrevong	0:8b2a15992487	4074	#define N_FATS 1 /* Number of FATs (1 or 2) */
adrevong	0:8b2a15992487	4075
adrevong	0:8b2a15992487	4076
adrevong	0:8b2a15992487	4077	FRESULT f_mkfs (
adrevong	0:8b2a15992487	4078	const TCHAR* path, /* Logical drive number */
adrevong	0:8b2a15992487	4079	BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
adrevong	0:8b2a15992487	4080	UINT au /* Size of allocation unit in unit of byte or sector */
adrevong	0:8b2a15992487	4081	)
adrevong	0:8b2a15992487	4082	{
adrevong	0:8b2a15992487	4083	static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
adrevong	0:8b2a15992487	4084	static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
adrevong	0:8b2a15992487	4085	int vol;
adrevong	0:8b2a15992487	4086	BYTE fmt, md, sys, *tbl, pdrv, part;
adrevong	0:8b2a15992487	4087	DWORD n_clst, vs, n, wsect;
adrevong	0:8b2a15992487	4088	UINT i;
adrevong	0:8b2a15992487	4089	DWORD b_vol, b_fat, b_dir, b_data; /* LBA */
adrevong	0:8b2a15992487	4090	DWORD n_vol, n_rsv, n_fat, n_dir; /* Size */
adrevong	0:8b2a15992487	4091	FATFS *fs;
adrevong	0:8b2a15992487	4092	DSTATUS stat;
adrevong	0:8b2a15992487	4093	#if _USE_TRIM
adrevong	0:8b2a15992487	4094	DWORD eb[2];
adrevong	0:8b2a15992487	4095	#endif
adrevong	0:8b2a15992487	4096
adrevong	0:8b2a15992487	4097
adrevong	0:8b2a15992487	4098	/* Check mounted drive and clear work area */
adrevong	0:8b2a15992487	4099	if (sfd > 1) return FR_INVALID_PARAMETER;
adrevong	0:8b2a15992487	4100	vol = get_ldnumber(&path);
adrevong	0:8b2a15992487	4101	if (vol < 0) return FR_INVALID_DRIVE;
adrevong	0:8b2a15992487	4102	fs = FatFs[vol];
adrevong	0:8b2a15992487	4103	if (!fs) return FR_NOT_ENABLED;
adrevong	0:8b2a15992487	4104	fs->fs_type = 0;
adrevong	0:8b2a15992487	4105	pdrv = LD2PD(vol); /* Physical drive */
adrevong	0:8b2a15992487	4106	part = LD2PT(vol); /* Partition (0:auto detect, 1-4:get from partition table)*/
adrevong	0:8b2a15992487	4107
adrevong	0:8b2a15992487	4108	/* Get disk statics */
adrevong	0:8b2a15992487	4109	stat = disk_initialize(pdrv);
adrevong	0:8b2a15992487	4110	if (stat & STA_NOINIT) return FR_NOT_READY;
adrevong	0:8b2a15992487	4111	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
adrevong	0:8b2a15992487	4112	#if _MAX_SS != _MIN_SS /* Get disk sector size */
adrevong	0:8b2a15992487	4113	if (disk_ioctl(pdrv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK \|\| SS(fs) > _MAX_SS \|\| SS(fs) < _MIN_SS)
adrevong	0:8b2a15992487	4114	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4115	#endif
adrevong	0:8b2a15992487	4116	if (_MULTI_PARTITION && part) {
adrevong	0:8b2a15992487	4117	/* Get partition information from partition table in the MBR */
adrevong	0:8b2a15992487	4118	if (disk_read(pdrv, fs->win, 0, 1) != RES_OK) return FR_DISK_ERR;
adrevong	0:8b2a15992487	4119	if (LD_WORD(fs->win + BS_55AA) != 0xAA55) return FR_MKFS_ABORTED;
adrevong	0:8b2a15992487	4120	tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
adrevong	0:8b2a15992487	4121	if (!tbl[4]) return FR_MKFS_ABORTED; /* No partition? */
adrevong	0:8b2a15992487	4122	b_vol = LD_DWORD(tbl + 8); /* Volume start sector */
adrevong	0:8b2a15992487	4123	n_vol = LD_DWORD(tbl + 12); /* Volume size */
adrevong	0:8b2a15992487	4124	} else {
adrevong	0:8b2a15992487	4125	/* Create a partition in this function */
adrevong	0:8b2a15992487	4126	if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &n_vol) != RES_OK \|\| n_vol < 128)
adrevong	0:8b2a15992487	4127	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4128	b_vol = (sfd) ? 0 : 63; /* Volume start sector */
adrevong	0:8b2a15992487	4129	n_vol -= b_vol; /* Volume size */
adrevong	0:8b2a15992487	4130	}
adrevong	0:8b2a15992487	4131
adrevong	0:8b2a15992487	4132	if (au & (au - 1)) au = 0;
adrevong	0:8b2a15992487	4133	if (!au) { /* AU auto selection */
adrevong	0:8b2a15992487	4134	vs = n_vol / (2000 / (SS(fs) / 512));
adrevong	0:8b2a15992487	4135	for (i = 0; vs < vst[i]; i++) ;
adrevong	0:8b2a15992487	4136	au = cst[i];
adrevong	0:8b2a15992487	4137	}
adrevong	0:8b2a15992487	4138	if (au >= _MIN_SS) au /= SS(fs); /* Number of sectors per cluster */
adrevong	0:8b2a15992487	4139	if (!au) au = 1;
adrevong	0:8b2a15992487	4140	if (au > 128) au = 128;
adrevong	0:8b2a15992487	4141
adrevong	0:8b2a15992487	4142	/* Pre-compute number of clusters and FAT sub-type */
adrevong	0:8b2a15992487	4143	n_clst = n_vol / au;
adrevong	0:8b2a15992487	4144	fmt = FS_FAT12;
adrevong	0:8b2a15992487	4145	if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
adrevong	0:8b2a15992487	4146	if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
adrevong	0:8b2a15992487	4147
adrevong	0:8b2a15992487	4148	/* Determine offset and size of FAT structure */
adrevong	0:8b2a15992487	4149	if (fmt == FS_FAT32) {
adrevong	0:8b2a15992487	4150	n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
adrevong	0:8b2a15992487	4151	n_rsv = 32;
adrevong	0:8b2a15992487	4152	n_dir = 0;
adrevong	0:8b2a15992487	4153	} else {
adrevong	0:8b2a15992487	4154	n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
adrevong	0:8b2a15992487	4155	n_fat = (n_fat + SS(fs) - 1) / SS(fs);
adrevong	0:8b2a15992487	4156	n_rsv = 1;
adrevong	0:8b2a15992487	4157	n_dir = (DWORD)N_ROOTDIR * SZ_DIRE / SS(fs);
adrevong	0:8b2a15992487	4158	}
adrevong	0:8b2a15992487	4159	b_fat = b_vol + n_rsv; /* FAT area start sector */
adrevong	0:8b2a15992487	4160	b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
adrevong	0:8b2a15992487	4161	b_data = b_dir + n_dir; /* Data area start sector */
adrevong	0:8b2a15992487	4162	if (n_vol < b_data + au - b_vol) return FR_MKFS_ABORTED; /* Too small volume */
adrevong	0:8b2a15992487	4163
adrevong	0:8b2a15992487	4164	/* Align data start sector to erase block boundary (for flash memory media) */
adrevong	0:8b2a15992487	4165	if (disk_ioctl(pdrv, GET_BLOCK_SIZE, &n) != RES_OK \|\| !n \|\| n > 32768) n = 1;
adrevong	0:8b2a15992487	4166	n = (b_data + n - 1) & ~(n - 1); /* Next nearest erase block from current data start */
adrevong	0:8b2a15992487	4167	n = (n - b_data) / N_FATS;
adrevong	0:8b2a15992487	4168	if (fmt == FS_FAT32) { /* FAT32: Move FAT offset */
adrevong	0:8b2a15992487	4169	n_rsv += n;
adrevong	0:8b2a15992487	4170	b_fat += n;
adrevong	0:8b2a15992487	4171	} else { /* FAT12/16: Expand FAT size */
adrevong	0:8b2a15992487	4172	n_fat += n;
adrevong	0:8b2a15992487	4173	}
adrevong	0:8b2a15992487	4174
adrevong	0:8b2a15992487	4175	/* Determine number of clusters and final check of validity of the FAT sub-type */
adrevong	0:8b2a15992487	4176	n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
adrevong	0:8b2a15992487	4177	if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
adrevong	0:8b2a15992487	4178	\|\| (fmt == FS_FAT32 && n_clst < MIN_FAT32))
adrevong	0:8b2a15992487	4179	return FR_MKFS_ABORTED;
adrevong	0:8b2a15992487	4180
adrevong	0:8b2a15992487	4181	/* Determine system ID in the partition table */
adrevong	0:8b2a15992487	4182	if (fmt == FS_FAT32) {
adrevong	0:8b2a15992487	4183	sys = 0x0C; /* FAT32X */
adrevong	0:8b2a15992487	4184	} else {
adrevong	0:8b2a15992487	4185	if (fmt == FS_FAT12 && n_vol < 0x10000) {
adrevong	0:8b2a15992487	4186	sys = 0x01; /* FAT12(<65536) */
adrevong	0:8b2a15992487	4187	} else {
adrevong	0:8b2a15992487	4188	sys = (n_vol < 0x10000) ? 0x04 : 0x06; /* FAT16(<65536) : FAT12/16(>=65536) */
adrevong	0:8b2a15992487	4189	}
adrevong	0:8b2a15992487	4190	}
adrevong	0:8b2a15992487	4191
adrevong	0:8b2a15992487	4192	if (_MULTI_PARTITION && part) {
adrevong	0:8b2a15992487	4193	/* Update system ID in the partition table */
adrevong	0:8b2a15992487	4194	tbl = &fs->win[MBR_Table + (part - 1) * SZ_PTE];
adrevong	0:8b2a15992487	4195	tbl[4] = sys;
adrevong	0:8b2a15992487	4196	if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to teh MBR */
adrevong	0:8b2a15992487	4197	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4198	md = 0xF8;
adrevong	0:8b2a15992487	4199	} else {
adrevong	0:8b2a15992487	4200	if (sfd) { /* No partition table (SFD) */
adrevong	0:8b2a15992487	4201	md = 0xF0;
adrevong	0:8b2a15992487	4202	} else { /* Create partition table (FDISK) */
adrevong	0:8b2a15992487	4203	mem_set(fs->win, 0, SS(fs));
adrevong	0:8b2a15992487	4204	tbl = fs->win + MBR_Table; /* Create partition table for single partition in the drive */
adrevong	0:8b2a15992487	4205	tbl[1] = 1; /* Partition start head */
adrevong	0:8b2a15992487	4206	tbl[2] = 1; /* Partition start sector */
adrevong	0:8b2a15992487	4207	tbl[3] = 0; /* Partition start cylinder */
adrevong	0:8b2a15992487	4208	tbl[4] = sys; /* System type */
adrevong	0:8b2a15992487	4209	tbl[5] = 254; /* Partition end head */
adrevong	0:8b2a15992487	4210	n = (b_vol + n_vol) / 63 / 255;
adrevong	0:8b2a15992487	4211	tbl[6] = (BYTE)(n >> 2 \| 63); /* Partition end sector */
adrevong	0:8b2a15992487	4212	tbl[7] = (BYTE)n; /* End cylinder */
adrevong	0:8b2a15992487	4213	ST_DWORD(tbl + 8, 63); /* Partition start in LBA */
adrevong	0:8b2a15992487	4214	ST_DWORD(tbl + 12, n_vol); /* Partition size in LBA */
adrevong	0:8b2a15992487	4215	ST_WORD(fs->win + BS_55AA, 0xAA55); /* MBR signature */
adrevong	0:8b2a15992487	4216	if (disk_write(pdrv, fs->win, 0, 1) != RES_OK) /* Write it to the MBR */
adrevong	0:8b2a15992487	4217	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4218	md = 0xF8;
adrevong	0:8b2a15992487	4219	}
adrevong	0:8b2a15992487	4220	}
adrevong	0:8b2a15992487	4221
adrevong	0:8b2a15992487	4222	/* Create BPB in the VBR */
adrevong	0:8b2a15992487	4223	tbl = fs->win; /* Clear sector */
adrevong	0:8b2a15992487	4224	mem_set(tbl, 0, SS(fs));
adrevong	0:8b2a15992487	4225	mem_cpy(tbl, "\xEB\xFE\x90" "MSDOS5.0", 11);/* Boot jump code, OEM name */
adrevong	0:8b2a15992487	4226	i = SS(fs); /* Sector size */
adrevong	0:8b2a15992487	4227	ST_WORD(tbl + BPB_BytsPerSec, i);
adrevong	0:8b2a15992487	4228	tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
adrevong	0:8b2a15992487	4229	ST_WORD(tbl + BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
adrevong	0:8b2a15992487	4230	tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
adrevong	0:8b2a15992487	4231	i = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of root directory entries */
adrevong	0:8b2a15992487	4232	ST_WORD(tbl + BPB_RootEntCnt, i);
adrevong	0:8b2a15992487	4233	if (n_vol < 0x10000) { /* Number of total sectors */
adrevong	0:8b2a15992487	4234	ST_WORD(tbl + BPB_TotSec16, n_vol);
adrevong	0:8b2a15992487	4235	} else {
adrevong	0:8b2a15992487	4236	ST_DWORD(tbl + BPB_TotSec32, n_vol);
adrevong	0:8b2a15992487	4237	}
adrevong	0:8b2a15992487	4238	tbl[BPB_Media] = md; /* Media descriptor */
adrevong	0:8b2a15992487	4239	ST_WORD(tbl + BPB_SecPerTrk, 63); /* Number of sectors per track */
adrevong	0:8b2a15992487	4240	ST_WORD(tbl + BPB_NumHeads, 255); /* Number of heads */
adrevong	0:8b2a15992487	4241	ST_DWORD(tbl + BPB_HiddSec, b_vol); /* Hidden sectors */
adrevong	0:8b2a15992487	4242	n = GET_FATTIME(); /* Use current time as VSN */
adrevong	0:8b2a15992487	4243	if (fmt == FS_FAT32) {
adrevong	0:8b2a15992487	4244	ST_DWORD(tbl + BS_VolID32, n); /* VSN */
adrevong	0:8b2a15992487	4245	ST_DWORD(tbl + BPB_FATSz32, n_fat); /* Number of sectors per FAT */
adrevong	0:8b2a15992487	4246	ST_DWORD(tbl + BPB_RootClus, 2); /* Root directory start cluster (2) */
adrevong	0:8b2a15992487	4247	ST_WORD(tbl + BPB_FSInfo, 1); /* FSINFO record offset (VBR + 1) */
adrevong	0:8b2a15992487	4248	ST_WORD(tbl + BPB_BkBootSec, 6); /* Backup boot record offset (VBR + 6) */
adrevong	0:8b2a15992487	4249	tbl[BS_DrvNum32] = 0x80; /* Drive number */
adrevong	0:8b2a15992487	4250	tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
adrevong	0:8b2a15992487	4251	mem_cpy(tbl + BS_VolLab32, "NO NAME " "FAT32 ", 19); /* Volume label, FAT signature */
adrevong	0:8b2a15992487	4252	} else {
adrevong	0:8b2a15992487	4253	ST_DWORD(tbl + BS_VolID, n); /* VSN */
adrevong	0:8b2a15992487	4254	ST_WORD(tbl + BPB_FATSz16, n_fat); /* Number of sectors per FAT */
adrevong	0:8b2a15992487	4255	tbl[BS_DrvNum] = 0x80; /* Drive number */
adrevong	0:8b2a15992487	4256	tbl[BS_BootSig] = 0x29; /* Extended boot signature */
adrevong	0:8b2a15992487	4257	mem_cpy(tbl + BS_VolLab, "NO NAME " "FAT ", 19); /* Volume label, FAT signature */
adrevong	0:8b2a15992487	4258	}
adrevong	0:8b2a15992487	4259	ST_WORD(tbl + BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
adrevong	0:8b2a15992487	4260	if (disk_write(pdrv, tbl, b_vol, 1) != RES_OK) /* Write it to the VBR sector */
adrevong	0:8b2a15992487	4261	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4262	if (fmt == FS_FAT32) /* Write it to the backup VBR if needed (VBR + 6) */
adrevong	0:8b2a15992487	4263	disk_write(pdrv, tbl, b_vol + 6, 1);
adrevong	0:8b2a15992487	4264
adrevong	0:8b2a15992487	4265	/* Initialize FAT area */
adrevong	0:8b2a15992487	4266	wsect = b_fat;
adrevong	0:8b2a15992487	4267	for (i = 0; i < N_FATS; i++) { /* Initialize each FAT copy */
adrevong	0:8b2a15992487	4268	mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
adrevong	0:8b2a15992487	4269	n = md; /* Media descriptor byte */
adrevong	0:8b2a15992487	4270	if (fmt != FS_FAT32) {
adrevong	0:8b2a15992487	4271	n \|= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
adrevong	0:8b2a15992487	4272	ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT12/16) */
adrevong	0:8b2a15992487	4273	} else {
adrevong	0:8b2a15992487	4274	n \|= 0xFFFFFF00;
adrevong	0:8b2a15992487	4275	ST_DWORD(tbl + 0, n); /* Reserve cluster #0-1 (FAT32) */
adrevong	0:8b2a15992487	4276	ST_DWORD(tbl + 4, 0xFFFFFFFF);
adrevong	0:8b2a15992487	4277	ST_DWORD(tbl + 8, 0x0FFFFFFF); /* Reserve cluster #2 for root directory */
adrevong	0:8b2a15992487	4278	}
adrevong	0:8b2a15992487	4279	if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
adrevong	0:8b2a15992487	4280	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4281	mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
adrevong	0:8b2a15992487	4282	for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector writes */
adrevong	0:8b2a15992487	4283	if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
adrevong	0:8b2a15992487	4284	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4285	}
adrevong	0:8b2a15992487	4286	}
adrevong	0:8b2a15992487	4287
adrevong	0:8b2a15992487	4288	/* Initialize root directory */
adrevong	0:8b2a15992487	4289	i = (fmt == FS_FAT32) ? au : (UINT)n_dir;
adrevong	0:8b2a15992487	4290	do {
adrevong	0:8b2a15992487	4291	if (disk_write(pdrv, tbl, wsect++, 1) != RES_OK)
adrevong	0:8b2a15992487	4292	return FR_DISK_ERR;
adrevong	0:8b2a15992487	4293	} while (--i);
adrevong	0:8b2a15992487	4294
adrevong	0:8b2a15992487	4295	#if _USE_TRIM /* Erase data area if needed */
adrevong	0:8b2a15992487	4296	{
adrevong	0:8b2a15992487	4297	eb[0] = wsect; eb[1] = wsect + (n_clst - ((fmt == FS_FAT32) ? 1 : 0)) * au - 1;
adrevong	0:8b2a15992487	4298	disk_ioctl(pdrv, CTRL_TRIM, eb);
adrevong	0:8b2a15992487	4299	}
adrevong	0:8b2a15992487	4300	#endif
adrevong	0:8b2a15992487	4301
adrevong	0:8b2a15992487	4302	/* Create FSINFO if needed */
adrevong	0:8b2a15992487	4303	if (fmt == FS_FAT32) {
adrevong	0:8b2a15992487	4304	ST_DWORD(tbl + FSI_LeadSig, 0x41615252);
adrevong	0:8b2a15992487	4305	ST_DWORD(tbl + FSI_StrucSig, 0x61417272);
adrevong	0:8b2a15992487	4306	ST_DWORD(tbl + FSI_Free_Count, n_clst - 1); /* Number of free clusters */
adrevong	0:8b2a15992487	4307	ST_DWORD(tbl + FSI_Nxt_Free, 2); /* Last allocated cluster# */
adrevong	0:8b2a15992487	4308	ST_WORD(tbl + BS_55AA, 0xAA55);
adrevong	0:8b2a15992487	4309	disk_write(pdrv, tbl, b_vol + 1, 1); /* Write original (VBR + 1) */
adrevong	0:8b2a15992487	4310	disk_write(pdrv, tbl, b_vol + 7, 1); /* Write backup (VBR + 7) */
adrevong	0:8b2a15992487	4311	}
adrevong	0:8b2a15992487	4312
adrevong	0:8b2a15992487	4313	return (disk_ioctl(pdrv, CTRL_SYNC, 0) == RES_OK) ? FR_OK : FR_DISK_ERR;
adrevong	0:8b2a15992487	4314	}
adrevong	0:8b2a15992487	4315
adrevong	0:8b2a15992487	4316
adrevong	0:8b2a15992487	4317
adrevong	0:8b2a15992487	4318	#if _MULTI_PARTITION
adrevong	0:8b2a15992487	4319	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4320	/* Create partition table on the physical drive */
adrevong	0:8b2a15992487	4321	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4322
adrevong	0:8b2a15992487	4323	FRESULT f_fdisk (
adrevong	0:8b2a15992487	4324	BYTE pdrv, /* Physical drive number */
adrevong	0:8b2a15992487	4325	const DWORD szt[], /* Pointer to the size table for each partitions */
adrevong	0:8b2a15992487	4326	void* work /* Pointer to the working buffer */
adrevong	0:8b2a15992487	4327	)
adrevong	0:8b2a15992487	4328	{
adrevong	0:8b2a15992487	4329	UINT i, n, sz_cyl, tot_cyl, b_cyl, e_cyl, p_cyl;
adrevong	0:8b2a15992487	4330	BYTE s_hd, e_hd, p, buf = (BYTE*)work;
adrevong	0:8b2a15992487	4331	DSTATUS stat;
adrevong	0:8b2a15992487	4332	DWORD sz_disk, sz_part, s_part;
adrevong	0:8b2a15992487	4333
adrevong	0:8b2a15992487	4334
adrevong	0:8b2a15992487	4335	stat = disk_initialize(pdrv);
adrevong	0:8b2a15992487	4336	if (stat & STA_NOINIT) return FR_NOT_READY;
adrevong	0:8b2a15992487	4337	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
adrevong	0:8b2a15992487	4338	if (disk_ioctl(pdrv, GET_SECTOR_COUNT, &sz_disk)) return FR_DISK_ERR;
adrevong	0:8b2a15992487	4339
adrevong	0:8b2a15992487	4340	/* Determine CHS in the table regardless of the drive geometry */
adrevong	0:8b2a15992487	4341	for (n = 16; n < 256 && sz_disk / n / 63 > 1024; n *= 2) ;
adrevong	0:8b2a15992487	4342	if (n == 256) n--;
adrevong	0:8b2a15992487	4343	e_hd = n - 1;
adrevong	0:8b2a15992487	4344	sz_cyl = 63 * n;
adrevong	0:8b2a15992487	4345	tot_cyl = sz_disk / sz_cyl;
adrevong	0:8b2a15992487	4346
adrevong	0:8b2a15992487	4347	/* Create partition table */
adrevong	0:8b2a15992487	4348	mem_set(buf, 0, _MAX_SS);
adrevong	0:8b2a15992487	4349	p = buf + MBR_Table; b_cyl = 0;
adrevong	0:8b2a15992487	4350	for (i = 0; i < 4; i++, p += SZ_PTE) {
adrevong	0:8b2a15992487	4351	p_cyl = (szt[i] <= 100U) ? (DWORD)tot_cyl * szt[i] / 100 : szt[i] / sz_cyl;
adrevong	0:8b2a15992487	4352	if (!p_cyl) continue;
adrevong	0:8b2a15992487	4353	s_part = (DWORD)sz_cyl * b_cyl;
adrevong	0:8b2a15992487	4354	sz_part = (DWORD)sz_cyl * p_cyl;
adrevong	0:8b2a15992487	4355	if (i == 0) { /* Exclude first track of cylinder 0 */
adrevong	0:8b2a15992487	4356	s_hd = 1;
adrevong	0:8b2a15992487	4357	s_part += 63; sz_part -= 63;
adrevong	0:8b2a15992487	4358	} else {
adrevong	0:8b2a15992487	4359	s_hd = 0;
adrevong	0:8b2a15992487	4360	}
adrevong	0:8b2a15992487	4361	e_cyl = b_cyl + p_cyl - 1;
adrevong	0:8b2a15992487	4362	if (e_cyl >= tot_cyl) return FR_INVALID_PARAMETER;
adrevong	0:8b2a15992487	4363
adrevong	0:8b2a15992487	4364	/* Set partition table */
adrevong	0:8b2a15992487	4365	p[1] = s_hd; /* Start head */
adrevong	0:8b2a15992487	4366	p[2] = (BYTE)((b_cyl >> 2) + 1); /* Start sector */
adrevong	0:8b2a15992487	4367	p[3] = (BYTE)b_cyl; /* Start cylinder */
adrevong	0:8b2a15992487	4368	p[4] = 0x06; /* System type (temporary setting) */
adrevong	0:8b2a15992487	4369	p[5] = e_hd; /* End head */
adrevong	0:8b2a15992487	4370	p[6] = (BYTE)((e_cyl >> 2) + 63); /* End sector */
adrevong	0:8b2a15992487	4371	p[7] = (BYTE)e_cyl; /* End cylinder */
adrevong	0:8b2a15992487	4372	ST_DWORD(p + 8, s_part); /* Start sector in LBA */
adrevong	0:8b2a15992487	4373	ST_DWORD(p + 12, sz_part); /* Partition size */
adrevong	0:8b2a15992487	4374
adrevong	0:8b2a15992487	4375	/* Next partition */
adrevong	0:8b2a15992487	4376	b_cyl += p_cyl;
adrevong	0:8b2a15992487	4377	}
adrevong	0:8b2a15992487	4378	ST_WORD(p, 0xAA55);
adrevong	0:8b2a15992487	4379
adrevong	0:8b2a15992487	4380	/* Write it to the MBR */
adrevong	0:8b2a15992487	4381	return (disk_write(pdrv, buf, 0, 1) != RES_OK \|\| disk_ioctl(pdrv, CTRL_SYNC, 0) != RES_OK) ? FR_DISK_ERR : FR_OK;
adrevong	0:8b2a15992487	4382	}
adrevong	0:8b2a15992487	4383
adrevong	0:8b2a15992487	4384
adrevong	0:8b2a15992487	4385	#endif /* _MULTI_PARTITION */
adrevong	0:8b2a15992487	4386	#endif /* _USE_MKFS && !_FS_READONLY */
adrevong	0:8b2a15992487	4387
adrevong	0:8b2a15992487	4388
adrevong	0:8b2a15992487	4389
adrevong	0:8b2a15992487	4390
adrevong	0:8b2a15992487	4391	#if _USE_STRFUNC
adrevong	0:8b2a15992487	4392	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4393	/* Get a string from the file */
adrevong	0:8b2a15992487	4394	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4395
adrevong	0:8b2a15992487	4396	TCHAR* f_gets (
adrevong	0:8b2a15992487	4397	TCHAR* buff, /* Pointer to the string buffer to read */
adrevong	0:8b2a15992487	4398	int len, /* Size of string buffer (characters) */
adrevong	0:8b2a15992487	4399	FIL* fp /* Pointer to the file object */
adrevong	0:8b2a15992487	4400	)
adrevong	0:8b2a15992487	4401	{
adrevong	0:8b2a15992487	4402	int n = 0;
adrevong	0:8b2a15992487	4403	TCHAR c, *p = buff;
adrevong	0:8b2a15992487	4404	BYTE s[2];
adrevong	0:8b2a15992487	4405	UINT rc;
adrevong	0:8b2a15992487	4406
adrevong	0:8b2a15992487	4407
adrevong	0:8b2a15992487	4408	while (n < len - 1) { /* Read characters until buffer gets filled */
adrevong	0:8b2a15992487	4409	#if _USE_LFN && _LFN_UNICODE
adrevong	0:8b2a15992487	4410	#if _STRF_ENCODE == 3 /* Read a character in UTF-8 */
adrevong	0:8b2a15992487	4411	f_read(fp, s, 1, &rc);
adrevong	0:8b2a15992487	4412	if (rc != 1) break;
adrevong	0:8b2a15992487	4413	c = s[0];
adrevong	0:8b2a15992487	4414	if (c >= 0x80) {
adrevong	0:8b2a15992487	4415	if (c < 0xC0) continue; /* Skip stray trailer */
adrevong	0:8b2a15992487	4416	if (c < 0xE0) { /* Two-byte sequence */
adrevong	0:8b2a15992487	4417	f_read(fp, s, 1, &rc);
adrevong	0:8b2a15992487	4418	if (rc != 1) break;
adrevong	0:8b2a15992487	4419	c = (c & 0x1F) << 6 \| (s[0] & 0x3F);
adrevong	0:8b2a15992487	4420	if (c < 0x80) c = '?';
adrevong	0:8b2a15992487	4421	} else {
adrevong	0:8b2a15992487	4422	if (c < 0xF0) { /* Three-byte sequence */
adrevong	0:8b2a15992487	4423	f_read(fp, s, 2, &rc);
adrevong	0:8b2a15992487	4424	if (rc != 2) break;
adrevong	0:8b2a15992487	4425	c = c << 12 \| (s[0] & 0x3F) << 6 \| (s[1] & 0x3F);
adrevong	0:8b2a15992487	4426	if (c < 0x800) c = '?';
adrevong	0:8b2a15992487	4427	} else { /* Reject four-byte sequence */
adrevong	0:8b2a15992487	4428	c = '?';
adrevong	0:8b2a15992487	4429	}
adrevong	0:8b2a15992487	4430	}
adrevong	0:8b2a15992487	4431	}
adrevong	0:8b2a15992487	4432	#elif _STRF_ENCODE == 2 /* Read a character in UTF-16BE */
adrevong	0:8b2a15992487	4433	f_read(fp, s, 2, &rc);
adrevong	0:8b2a15992487	4434	if (rc != 2) break;
adrevong	0:8b2a15992487	4435	c = s[1] + (s[0] << 8);
adrevong	0:8b2a15992487	4436	#elif _STRF_ENCODE == 1 /* Read a character in UTF-16LE */
adrevong	0:8b2a15992487	4437	f_read(fp, s, 2, &rc);
adrevong	0:8b2a15992487	4438	if (rc != 2) break;
adrevong	0:8b2a15992487	4439	c = s[0] + (s[1] << 8);
adrevong	0:8b2a15992487	4440	#else /* Read a character in ANSI/OEM */
adrevong	0:8b2a15992487	4441	f_read(fp, s, 1, &rc);
adrevong	0:8b2a15992487	4442	if (rc != 1) break;
adrevong	0:8b2a15992487	4443	c = s[0];
adrevong	0:8b2a15992487	4444	if (IsDBCS1(c)) {
adrevong	0:8b2a15992487	4445	f_read(fp, s, 1, &rc);
adrevong	0:8b2a15992487	4446	if (rc != 1) break;
adrevong	0:8b2a15992487	4447	c = (c << 8) + s[0];
adrevong	0:8b2a15992487	4448	}
adrevong	0:8b2a15992487	4449	c = ff_convert(c, 1); /* OEM -> Unicode */
adrevong	0:8b2a15992487	4450	if (!c) c = '?';
adrevong	0:8b2a15992487	4451	#endif
adrevong	0:8b2a15992487	4452	#else /* Read a character without conversion */
adrevong	0:8b2a15992487	4453	f_read(fp, s, 1, &rc);
adrevong	0:8b2a15992487	4454	if (rc != 1) break;
adrevong	0:8b2a15992487	4455	c = s[0];
adrevong	0:8b2a15992487	4456	#endif
adrevong	0:8b2a15992487	4457	if (_USE_STRFUNC == 2 && c == '\r') continue; /* Strip '\r' */
adrevong	0:8b2a15992487	4458	*p++ = c;
adrevong	0:8b2a15992487	4459	n++;
adrevong	0:8b2a15992487	4460	if (c == '\n') break; /* Break on EOL */
adrevong	0:8b2a15992487	4461	}
adrevong	0:8b2a15992487	4462	*p = 0;
adrevong	0:8b2a15992487	4463	return n ? buff : 0; /* When no data read (eof or error), return with error. */
adrevong	0:8b2a15992487	4464	}
adrevong	0:8b2a15992487	4465
adrevong	0:8b2a15992487	4466
adrevong	0:8b2a15992487	4467
adrevong	0:8b2a15992487	4468
adrevong	0:8b2a15992487	4469	#if !_FS_READONLY
adrevong	0:8b2a15992487	4470	#include <stdarg.h>
adrevong	0:8b2a15992487	4471	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4472	/* Put a character to the file */
adrevong	0:8b2a15992487	4473	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4474
adrevong	0:8b2a15992487	4475	typedef struct {
adrevong	0:8b2a15992487	4476	FIL* fp;
adrevong	0:8b2a15992487	4477	int idx, nchr;
adrevong	0:8b2a15992487	4478	BYTE buf[64];
adrevong	0:8b2a15992487	4479	} putbuff;
adrevong	0:8b2a15992487	4480
adrevong	0:8b2a15992487	4481
adrevong	0:8b2a15992487	4482	static
adrevong	0:8b2a15992487	4483	void putc_bfd (
adrevong	0:8b2a15992487	4484	putbuff* pb,
adrevong	0:8b2a15992487	4485	TCHAR c
adrevong	0:8b2a15992487	4486	)
adrevong	0:8b2a15992487	4487	{
adrevong	0:8b2a15992487	4488	UINT bw;
adrevong	0:8b2a15992487	4489	int i;
adrevong	0:8b2a15992487	4490
adrevong	0:8b2a15992487	4491
adrevong	0:8b2a15992487	4492	if (_USE_STRFUNC == 2 && c == '\n') /* LF -> CRLF conversion */
adrevong	0:8b2a15992487	4493	putc_bfd(pb, '\r');
adrevong	0:8b2a15992487	4494
adrevong	0:8b2a15992487	4495	i = pb->idx; /* Buffer write index (-1:error) */
adrevong	0:8b2a15992487	4496	if (i < 0) return;
adrevong	0:8b2a15992487	4497
adrevong	0:8b2a15992487	4498	#if _USE_LFN && _LFN_UNICODE
adrevong	0:8b2a15992487	4499	#if _STRF_ENCODE == 3 /* Write a character in UTF-8 */
adrevong	0:8b2a15992487	4500	if (c < 0x80) { /* 7-bit */
adrevong	0:8b2a15992487	4501	pb->buf[i++] = (BYTE)c;
adrevong	0:8b2a15992487	4502	} else {
adrevong	0:8b2a15992487	4503	if (c < 0x800) { /* 11-bit */
adrevong	0:8b2a15992487	4504	pb->buf[i++] = (BYTE)(0xC0 \| c >> 6);
adrevong	0:8b2a15992487	4505	} else { /* 16-bit */
adrevong	0:8b2a15992487	4506	pb->buf[i++] = (BYTE)(0xE0 \| c >> 12);
adrevong	0:8b2a15992487	4507	pb->buf[i++] = (BYTE)(0x80 \| (c >> 6 & 0x3F));
adrevong	0:8b2a15992487	4508	}
adrevong	0:8b2a15992487	4509	pb->buf[i++] = (BYTE)(0x80 \| (c & 0x3F));
adrevong	0:8b2a15992487	4510	}
adrevong	0:8b2a15992487	4511	#elif _STRF_ENCODE == 2 /* Write a character in UTF-16BE */
adrevong	0:8b2a15992487	4512	pb->buf[i++] = (BYTE)(c >> 8);
adrevong	0:8b2a15992487	4513	pb->buf[i++] = (BYTE)c;
adrevong	0:8b2a15992487	4514	#elif _STRF_ENCODE == 1 /* Write a character in UTF-16LE */
adrevong	0:8b2a15992487	4515	pb->buf[i++] = (BYTE)c;
adrevong	0:8b2a15992487	4516	pb->buf[i++] = (BYTE)(c >> 8);
adrevong	0:8b2a15992487	4517	#else /* Write a character in ANSI/OEM */
adrevong	0:8b2a15992487	4518	c = ff_convert(c, 0); /* Unicode -> OEM */
adrevong	0:8b2a15992487	4519	if (!c) c = '?';
adrevong	0:8b2a15992487	4520	if (c >= 0x100)
adrevong	0:8b2a15992487	4521	pb->buf[i++] = (BYTE)(c >> 8);
adrevong	0:8b2a15992487	4522	pb->buf[i++] = (BYTE)c;
adrevong	0:8b2a15992487	4523	#endif
adrevong	0:8b2a15992487	4524	#else /* Write a character without conversion */
adrevong	0:8b2a15992487	4525	pb->buf[i++] = (BYTE)c;
adrevong	0:8b2a15992487	4526	#endif
adrevong	0:8b2a15992487	4527
adrevong	0:8b2a15992487	4528	if (i >= (int)(sizeof pb->buf) - 3) { /* Write buffered characters to the file */
adrevong	0:8b2a15992487	4529	f_write(pb->fp, pb->buf, (UINT)i, &bw);
adrevong	0:8b2a15992487	4530	i = (bw == (UINT)i) ? 0 : -1;
adrevong	0:8b2a15992487	4531	}
adrevong	0:8b2a15992487	4532	pb->idx = i;
adrevong	0:8b2a15992487	4533	pb->nchr++;
adrevong	0:8b2a15992487	4534	}
adrevong	0:8b2a15992487	4535
adrevong	0:8b2a15992487	4536
adrevong	0:8b2a15992487	4537
adrevong	0:8b2a15992487	4538	int f_putc (
adrevong	0:8b2a15992487	4539	TCHAR c, /* A character to be output */
adrevong	0:8b2a15992487	4540	FIL* fp /* Pointer to the file object */
adrevong	0:8b2a15992487	4541	)
adrevong	0:8b2a15992487	4542	{
adrevong	0:8b2a15992487	4543	putbuff pb;
adrevong	0:8b2a15992487	4544	UINT nw;
adrevong	0:8b2a15992487	4545
adrevong	0:8b2a15992487	4546
adrevong	0:8b2a15992487	4547	pb.fp = fp; /* Initialize output buffer */
adrevong	0:8b2a15992487	4548	pb.nchr = pb.idx = 0;
adrevong	0:8b2a15992487	4549
adrevong	0:8b2a15992487	4550	putc_bfd(&pb, c); /* Put a character */
adrevong	0:8b2a15992487	4551
adrevong	0:8b2a15992487	4552	if ( pb.idx >= 0 /* Flush buffered characters to the file */
adrevong	0:8b2a15992487	4553	&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
adrevong	0:8b2a15992487	4554	&& (UINT)pb.idx == nw) return pb.nchr;
adrevong	0:8b2a15992487	4555	return EOF;
adrevong	0:8b2a15992487	4556	}
adrevong	0:8b2a15992487	4557
adrevong	0:8b2a15992487	4558
adrevong	0:8b2a15992487	4559
adrevong	0:8b2a15992487	4560
adrevong	0:8b2a15992487	4561	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4562	/* Put a string to the file */
adrevong	0:8b2a15992487	4563	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4564
adrevong	0:8b2a15992487	4565	int f_puts (
adrevong	0:8b2a15992487	4566	const TCHAR* str, /* Pointer to the string to be output */
adrevong	0:8b2a15992487	4567	FIL* fp /* Pointer to the file object */
adrevong	0:8b2a15992487	4568	)
adrevong	0:8b2a15992487	4569	{
adrevong	0:8b2a15992487	4570	putbuff pb;
adrevong	0:8b2a15992487	4571	UINT nw;
adrevong	0:8b2a15992487	4572
adrevong	0:8b2a15992487	4573
adrevong	0:8b2a15992487	4574	pb.fp = fp; /* Initialize output buffer */
adrevong	0:8b2a15992487	4575	pb.nchr = pb.idx = 0;
adrevong	0:8b2a15992487	4576
adrevong	0:8b2a15992487	4577	while (str) / Put the string */
adrevong	0:8b2a15992487	4578	putc_bfd(&pb, *str++);
adrevong	0:8b2a15992487	4579
adrevong	0:8b2a15992487	4580	if ( pb.idx >= 0 /* Flush buffered characters to the file */
adrevong	0:8b2a15992487	4581	&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
adrevong	0:8b2a15992487	4582	&& (UINT)pb.idx == nw) return pb.nchr;
adrevong	0:8b2a15992487	4583	return EOF;
adrevong	0:8b2a15992487	4584	}
adrevong	0:8b2a15992487	4585
adrevong	0:8b2a15992487	4586
adrevong	0:8b2a15992487	4587
adrevong	0:8b2a15992487	4588
adrevong	0:8b2a15992487	4589	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4590	/* Put a formatted string to the file */
adrevong	0:8b2a15992487	4591	/-----------------------------------------------------------------------/
adrevong	0:8b2a15992487	4592
adrevong	0:8b2a15992487	4593	int f_printf (
adrevong	0:8b2a15992487	4594	FIL* fp, /* Pointer to the file object */
adrevong	0:8b2a15992487	4595	const TCHAR* fmt, /* Pointer to the format string */
adrevong	0:8b2a15992487	4596	... /* Optional arguments... */
adrevong	0:8b2a15992487	4597	)
adrevong	0:8b2a15992487	4598	{
adrevong	0:8b2a15992487	4599	va_list arp;
adrevong	0:8b2a15992487	4600	BYTE f, r;
adrevong	0:8b2a15992487	4601	UINT nw, i, j, w;
adrevong	0:8b2a15992487	4602	DWORD v;
adrevong	0:8b2a15992487	4603	TCHAR c, d, s[16], *p;
adrevong	0:8b2a15992487	4604	putbuff pb;
adrevong	0:8b2a15992487	4605
adrevong	0:8b2a15992487	4606
adrevong	0:8b2a15992487	4607	pb.fp = fp; /* Initialize output buffer */
adrevong	0:8b2a15992487	4608	pb.nchr = pb.idx = 0;
adrevong	0:8b2a15992487	4609
adrevong	0:8b2a15992487	4610	va_start(arp, fmt);
adrevong	0:8b2a15992487	4611
adrevong	0:8b2a15992487	4612	for (;;) {
adrevong	0:8b2a15992487	4613	c = *fmt++;
adrevong	0:8b2a15992487	4614	if (c == 0) break; /* End of string */
adrevong	0:8b2a15992487	4615	if (c != '%') { /* Non escape character */
adrevong	0:8b2a15992487	4616	putc_bfd(&pb, c);
adrevong	0:8b2a15992487	4617	continue;
adrevong	0:8b2a15992487	4618	}
adrevong	0:8b2a15992487	4619	w = f = 0;
adrevong	0:8b2a15992487	4620	c = *fmt++;
adrevong	0:8b2a15992487	4621	if (c == '0') { /* Flag: '0' padding */
adrevong	0:8b2a15992487	4622	f = 1; c = *fmt++;
adrevong	0:8b2a15992487	4623	} else {
adrevong	0:8b2a15992487	4624	if (c == '-') { /* Flag: left justified */
adrevong	0:8b2a15992487	4625	f = 2; c = *fmt++;
adrevong	0:8b2a15992487	4626	}
adrevong	0:8b2a15992487	4627	}
adrevong	0:8b2a15992487	4628	while (IsDigit(c)) { /* Precision */
adrevong	0:8b2a15992487	4629	w = w * 10 + c - '0';
adrevong	0:8b2a15992487	4630	c = *fmt++;
adrevong	0:8b2a15992487	4631	}
adrevong	0:8b2a15992487	4632	if (c == 'l' \|\| c == 'L') { /* Prefix: Size is long int */
adrevong	0:8b2a15992487	4633	f \|= 4; c = *fmt++;
adrevong	0:8b2a15992487	4634	}
adrevong	0:8b2a15992487	4635	if (!c) break;
adrevong	0:8b2a15992487	4636	d = c;
adrevong	0:8b2a15992487	4637	if (IsLower(d)) d -= 0x20;
adrevong	0:8b2a15992487	4638	switch (d) { /* Type is... */
adrevong	0:8b2a15992487	4639	case 'S' : /* String */
adrevong	0:8b2a15992487	4640	p = va_arg(arp, TCHAR*);
adrevong	0:8b2a15992487	4641	for (j = 0; p[j]; j++) ;
adrevong	0:8b2a15992487	4642	if (!(f & 2)) {
adrevong	0:8b2a15992487	4643	while (j++ < w) putc_bfd(&pb, ' ');
adrevong	0:8b2a15992487	4644	}
adrevong	0:8b2a15992487	4645	while (p) putc_bfd(&pb, p++);
adrevong	0:8b2a15992487	4646	while (j++ < w) putc_bfd(&pb, ' ');
adrevong	0:8b2a15992487	4647	continue;
adrevong	0:8b2a15992487	4648	case 'C' : /* Character */
adrevong	0:8b2a15992487	4649	putc_bfd(&pb, (TCHAR)va_arg(arp, int)); continue;
adrevong	0:8b2a15992487	4650	case 'B' : /* Binary */
adrevong	0:8b2a15992487	4651	r = 2; break;
adrevong	0:8b2a15992487	4652	case 'O' : /* Octal */
adrevong	0:8b2a15992487	4653	r = 8; break;
adrevong	0:8b2a15992487	4654	case 'D' : /* Signed decimal */
adrevong	0:8b2a15992487	4655	case 'U' : /* Unsigned decimal */
adrevong	0:8b2a15992487	4656	r = 10; break;
adrevong	0:8b2a15992487	4657	case 'X' : /* Hexdecimal */
adrevong	0:8b2a15992487	4658	r = 16; break;
adrevong	0:8b2a15992487	4659	default: /* Unknown type (pass-through) */
adrevong	0:8b2a15992487	4660	putc_bfd(&pb, c); continue;
adrevong	0:8b2a15992487	4661	}
adrevong	0:8b2a15992487	4662
adrevong	0:8b2a15992487	4663	/* Get an argument and put it in numeral */
adrevong	0:8b2a15992487	4664	v = (f & 4) ? (DWORD)va_arg(arp, long) : ((d == 'D') ? (DWORD)(long)va_arg(arp, int) : (DWORD)va_arg(arp, unsigned int));
adrevong	0:8b2a15992487	4665	if (d == 'D' && (v & 0x80000000)) {
adrevong	0:8b2a15992487	4666	v = 0 - v;
adrevong	0:8b2a15992487	4667	f \|= 8;
adrevong	0:8b2a15992487	4668	}
adrevong	0:8b2a15992487	4669	i = 0;
adrevong	0:8b2a15992487	4670	do {
adrevong	0:8b2a15992487	4671	d = (TCHAR)(v % r); v /= r;
adrevong	0:8b2a15992487	4672	if (d > 9) d += (c == 'x') ? 0x27 : 0x07;
adrevong	0:8b2a15992487	4673	s[i++] = d + '0';
adrevong	0:8b2a15992487	4674	} while (v && i < sizeof s / sizeof s[0]);
adrevong	0:8b2a15992487	4675	if (f & 8) s[i++] = '-';
adrevong	0:8b2a15992487	4676	j = i; d = (f & 1) ? '0' : ' ';
adrevong	0:8b2a15992487	4677	while (!(f & 2) && j++ < w) putc_bfd(&pb, d);
adrevong	0:8b2a15992487	4678	do putc_bfd(&pb, s[--i]); while (i);
adrevong	0:8b2a15992487	4679	while (j++ < w) putc_bfd(&pb, d);
adrevong	0:8b2a15992487	4680	}
adrevong	0:8b2a15992487	4681
adrevong	0:8b2a15992487	4682	va_end(arp);
adrevong	0:8b2a15992487	4683
adrevong	0:8b2a15992487	4684	if ( pb.idx >= 0 /* Flush buffered characters to the file */
adrevong	0:8b2a15992487	4685	&& f_write(pb.fp, pb.buf, (UINT)pb.idx, &nw) == FR_OK
adrevong	0:8b2a15992487	4686	&& (UINT)pb.idx == nw) return pb.nchr;
adrevong	0:8b2a15992487	4687	return EOF;
adrevong	0:8b2a15992487	4688	}
adrevong	0:8b2a15992487	4689
adrevong	0:8b2a15992487	4690	#endif /* !_FS_READONLY */
adrevong	0:8b2a15992487	4691	#endif /* _USE_STRFUNC */

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Type:	Program
Created:	28 Jan 2020
Imports:	0
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	62

FATFileSystem/ChaN/ff.cpp@0:8b2a15992487, 2020-01-28 (annotated)

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