AVC_2012 - Code for autonomous ground vehicle, Data Bus, 3rd…

Users » shimniok » Code » AVC_2012

Michael Shimniok / Mbed 2 deprecated AVC_2012

Code for autonomous ground vehicle, Data Bus, 3rd place winner in 2012 Sparkfun AVC.

Dependencies: Watchdog mbed Schedule SimpleFilter LSM303DLM PinDetect DebounceIn Servo

SDFileSystem/FATFileSystem/Core/ff.c@0:826c6171fc1b, 2012-06-20 (annotated)

Committer:: shimniok
Date:: Wed Jun 20 14:57:48 2012 +0000
Revision:: 0:826c6171fc1b

Updated documentation

Who changed what in which revision?

User	Revision	Line number	New contents of line
shimniok	0:826c6171fc1b	1	/*----------------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2	/ FatFs - FAT file system module R0.08 (C)ChaN, 2010
shimniok	0:826c6171fc1b	3	/-----------------------------------------------------------------------------/
shimniok	0:826c6171fc1b	4	/ FatFs module is a generic FAT file system module for small embedded systems.
shimniok	0:826c6171fc1b	5	/ This is a free software that opened for education, research and commercial
shimniok	0:826c6171fc1b	6	/ developments under license policy of following terms.
shimniok	0:826c6171fc1b	7	/
shimniok	0:826c6171fc1b	8	/ Copyright (C) 2010, ChaN, all right reserved.
shimniok	0:826c6171fc1b	9	/
shimniok	0:826c6171fc1b	10	/ * The FatFs module is a free software and there is NO WARRANTY.
shimniok	0:826c6171fc1b	11	/ * No restriction on use. You can use, modify and redistribute it for
shimniok	0:826c6171fc1b	12	/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
shimniok	0:826c6171fc1b	13	/ * Redistributions of source code must retain the above copyright notice.
shimniok	0:826c6171fc1b	14	/
shimniok	0:826c6171fc1b	15	/-----------------------------------------------------------------------------/
shimniok	0:826c6171fc1b	16	/ Feb 26,'06 R0.00 Prototype.
shimniok	0:826c6171fc1b	17	/
shimniok	0:826c6171fc1b	18	/ Apr 29,'06 R0.01 First stable version.
shimniok	0:826c6171fc1b	19	/
shimniok	0:826c6171fc1b	20	/ Jun 01,'06 R0.02 Added FAT12 support.
shimniok	0:826c6171fc1b	21	/ Removed unbuffered mode.
shimniok	0:826c6171fc1b	22	/ Fixed a problem on small (<32M) partition.
shimniok	0:826c6171fc1b	23	/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
shimniok	0:826c6171fc1b	24	/
shimniok	0:826c6171fc1b	25	/ Sep 22,'06 R0.03 Added f_rename().
shimniok	0:826c6171fc1b	26	/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
shimniok	0:826c6171fc1b	27	/ Dec 11,'06 R0.03a Improved cluster scan algorithm to write files fast.
shimniok	0:826c6171fc1b	28	/ Fixed f_mkdir() creates incorrect directory on FAT32.
shimniok	0:826c6171fc1b	29	/
shimniok	0:826c6171fc1b	30	/ Feb 04,'07 R0.04 Supported multiple drive system.
shimniok	0:826c6171fc1b	31	/ Changed some interfaces for multiple drive system.
shimniok	0:826c6171fc1b	32	/ Changed f_mountdrv() to f_mount().
shimniok	0:826c6171fc1b	33	/ Added f_mkfs().
shimniok	0:826c6171fc1b	34	/ Apr 01,'07 R0.04a Supported multiple partitions on a physical drive.
shimniok	0:826c6171fc1b	35	/ Added a capability of extending file size to f_lseek().
shimniok	0:826c6171fc1b	36	/ Added minimization level 3.
shimniok	0:826c6171fc1b	37	/ Fixed an endian sensitive code in f_mkfs().
shimniok	0:826c6171fc1b	38	/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
shimniok	0:826c6171fc1b	39	/ Added FSInfo support.
shimniok	0:826c6171fc1b	40	/ Fixed DBCS name can result FR_INVALID_NAME.
shimniok	0:826c6171fc1b	41	/ Fixed short seek (<= csize) collapses the file object.
shimniok	0:826c6171fc1b	42	/
shimniok	0:826c6171fc1b	43	/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
shimniok	0:826c6171fc1b	44	/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
shimniok	0:826c6171fc1b	45	/ Fixed f_mkdir() on FAT32 creates incorrect directory.
shimniok	0:826c6171fc1b	46	/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
shimniok	0:826c6171fc1b	47	/ Fixed off by one error at FAT sub-type determination.
shimniok	0:826c6171fc1b	48	/ Fixed btr in f_read() can be mistruncated.
shimniok	0:826c6171fc1b	49	/ Fixed cached sector is not flushed when create and close
shimniok	0:826c6171fc1b	50	/ without write.
shimniok	0:826c6171fc1b	51	/
shimniok	0:826c6171fc1b	52	/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
shimniok	0:826c6171fc1b	53	/ Improved performance of f_lseek() on moving to the same
shimniok	0:826c6171fc1b	54	/ or following cluster.
shimniok	0:826c6171fc1b	55	/
shimniok	0:826c6171fc1b	56	/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
shimniok	0:826c6171fc1b	57	/ Added long file name support.
shimniok	0:826c6171fc1b	58	/ Added multiple code page support.
shimniok	0:826c6171fc1b	59	/ Added re-entrancy for multitask operation.
shimniok	0:826c6171fc1b	60	/ Added auto cluster size selection to f_mkfs().
shimniok	0:826c6171fc1b	61	/ Added rewind option to f_readdir().
shimniok	0:826c6171fc1b	62	/ Changed result code of critical errors.
shimniok	0:826c6171fc1b	63	/ Renamed string functions to avoid name collision.
shimniok	0:826c6171fc1b	64	/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
shimniok	0:826c6171fc1b	65	/ Added multiple sector size support.
shimniok	0:826c6171fc1b	66	/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
shimniok	0:826c6171fc1b	67	/ Fixed wrong cache control in f_lseek().
shimniok	0:826c6171fc1b	68	/ Added relative path feature.
shimniok	0:826c6171fc1b	69	/ Added f_chdir() and f_chdrive().
shimniok	0:826c6171fc1b	70	/ Added proper case conversion to extended char.
shimniok	0:826c6171fc1b	71	/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
shimniok	0:826c6171fc1b	72	/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
shimniok	0:826c6171fc1b	73	/ Fixed name matching error on the 13 char boundary.
shimniok	0:826c6171fc1b	74	/ Added a configuration option, _LFN_UNICODE.
shimniok	0:826c6171fc1b	75	/ Changed f_readdir() to return the SFN with always upper
shimniok	0:826c6171fc1b	76	/ case on non-LFN cfg.
shimniok	0:826c6171fc1b	77	/
shimniok	0:826c6171fc1b	78	/ May 15,'10 R0.08 Added a memory configuration option. (_USE_LFN)
shimniok	0:826c6171fc1b	79	/ Added file lock feature. (_FS_SHARE)
shimniok	0:826c6171fc1b	80	/ Added fast seek feature. (_USE_FASTSEEK)
shimniok	0:826c6171fc1b	81	/ Changed some types on the API, XCHAR->TCHAR.
shimniok	0:826c6171fc1b	82	/ Changed fname member in the FILINFO structure on Unicode cfg.
shimniok	0:826c6171fc1b	83	/ String functions support UTF-8 encoding files on Unicode cfg.
shimniok	0:826c6171fc1b	84	/---------------------------------------------------------------------------*/
shimniok	0:826c6171fc1b	85
shimniok	0:826c6171fc1b	86	//Modified by Thomas Hamilton, Copyright 2010
shimniok	0:826c6171fc1b	87
shimniok	0:826c6171fc1b	88	#include "ff.h" /* FatFs configurations and declarations */
shimniok	0:826c6171fc1b	89	#include "diskio.h" /* Declarations of low level disk I/O functions */
shimniok	0:826c6171fc1b	90
shimniok	0:826c6171fc1b	91
shimniok	0:826c6171fc1b	92	/*--------------------------------------------------------------------------
shimniok	0:826c6171fc1b	93
shimniok	0:826c6171fc1b	94	Module Private Definitions
shimniok	0:826c6171fc1b	95
shimniok	0:826c6171fc1b	96	---------------------------------------------------------------------------*/
shimniok	0:826c6171fc1b	97
shimniok	0:826c6171fc1b	98	#if _FATFS != 8085
shimniok	0:826c6171fc1b	99	#error Wrong include file (ff.h).
shimniok	0:826c6171fc1b	100	#endif
shimniok	0:826c6171fc1b	101
shimniok	0:826c6171fc1b	102
shimniok	0:826c6171fc1b	103	/* FAT sub-type boundaries */
shimniok	0:826c6171fc1b	104	/* Note that the FAT spec by Microsoft says 4085 but Windows works with 4087! */
shimniok	0:826c6171fc1b	105	#define MIN_FAT16 4086 /* Minimum number of clusters for FAT16 */
shimniok	0:826c6171fc1b	106	#define MIN_FAT32 65526 /* Minimum number of clusters for FAT32 */
shimniok	0:826c6171fc1b	107
shimniok	0:826c6171fc1b	108
shimniok	0:826c6171fc1b	109	/* Definitions corresponds to multiple sector size */
shimniok	0:826c6171fc1b	110	#if _MAX_SS == 512 /* Single sector size */
shimniok	0:826c6171fc1b	111	#define SS(fs) 512U
shimniok	0:826c6171fc1b	112	#elif _MAX_SS == 1024 \|\| _MAX_SS == 2048 \|\| _MAX_SS == 4096 /* Multiple sector size */
shimniok	0:826c6171fc1b	113	#define SS(fs) ((fs)->ssize)
shimniok	0:826c6171fc1b	114	#else
shimniok	0:826c6171fc1b	115	#error Wrong sector size.
shimniok	0:826c6171fc1b	116	#endif
shimniok	0:826c6171fc1b	117
shimniok	0:826c6171fc1b	118
shimniok	0:826c6171fc1b	119	/* Reentrancy related */
shimniok	0:826c6171fc1b	120	#if _FS_REENTRANT
shimniok	0:826c6171fc1b	121	#if _USE_LFN == 1
shimniok	0:826c6171fc1b	122	#error Static LFN work area must not be used in re-entrant configuration.
shimniok	0:826c6171fc1b	123	#endif
shimniok	0:826c6171fc1b	124	#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
shimniok	0:826c6171fc1b	125	#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
shimniok	0:826c6171fc1b	126
shimniok	0:826c6171fc1b	127	#else
shimniok	0:826c6171fc1b	128	#define ENTER_FF(fs)
shimniok	0:826c6171fc1b	129	#define LEAVE_FF(fs, res) return res
shimniok	0:826c6171fc1b	130
shimniok	0:826c6171fc1b	131	#endif
shimniok	0:826c6171fc1b	132
shimniok	0:826c6171fc1b	133	#define ABORT(fs, res) { fp->flag \|= FA__ERROR; LEAVE_FF(fs, res); }
shimniok	0:826c6171fc1b	134
shimniok	0:826c6171fc1b	135
shimniok	0:826c6171fc1b	136	/* Character code support macros */
shimniok	0:826c6171fc1b	137	#define IsUpper(c) (((c)>='A')&&((c)<='Z'))
shimniok	0:826c6171fc1b	138	#define IsLower(c) (((c)>='a')&&((c)<='z'))
shimniok	0:826c6171fc1b	139	#define IsDigit(c) (((c)>='0')&&((c)<='9'))
shimniok	0:826c6171fc1b	140
shimniok	0:826c6171fc1b	141	#if _DF1S /* Code page is DBCS */
shimniok	0:826c6171fc1b	142
shimniok	0:826c6171fc1b	143	#ifdef _DF2S /* Two 1st byte areas */
shimniok	0:826c6171fc1b	144	#define IsDBCS1(c) (((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E) \|\| ((BYTE)(c) >= _DF2S && (BYTE)(c) <= _DF2E))
shimniok	0:826c6171fc1b	145	#else /* One 1st byte area */
shimniok	0:826c6171fc1b	146	#define IsDBCS1(c) ((BYTE)(c) >= _DF1S && (BYTE)(c) <= _DF1E)
shimniok	0:826c6171fc1b	147	#endif
shimniok	0:826c6171fc1b	148
shimniok	0:826c6171fc1b	149	#ifdef _DS3S /* Three 2nd byte areas */
shimniok	0:826c6171fc1b	150	#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) \|\| ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E) \|\| ((BYTE)(c) >= _DS3S && (BYTE)(c) <= _DS3E))
shimniok	0:826c6171fc1b	151	#else /* Two 2nd byte areas */
shimniok	0:826c6171fc1b	152	#define IsDBCS2(c) (((BYTE)(c) >= _DS1S && (BYTE)(c) <= _DS1E) \|\| ((BYTE)(c) >= _DS2S && (BYTE)(c) <= _DS2E))
shimniok	0:826c6171fc1b	153	#endif
shimniok	0:826c6171fc1b	154
shimniok	0:826c6171fc1b	155	#else /* Code page is SBCS */
shimniok	0:826c6171fc1b	156
shimniok	0:826c6171fc1b	157	#define IsDBCS1(c) 0
shimniok	0:826c6171fc1b	158	#define IsDBCS2(c) 0
shimniok	0:826c6171fc1b	159
shimniok	0:826c6171fc1b	160	#endif /* _DF1S */
shimniok	0:826c6171fc1b	161
shimniok	0:826c6171fc1b	162
shimniok	0:826c6171fc1b	163	/* Name status flags */
shimniok	0:826c6171fc1b	164	#define NS 11 /* Offset of name status byte */
shimniok	0:826c6171fc1b	165	#define NS_LOSS 0x01 /* Out of 8.3 format */
shimniok	0:826c6171fc1b	166	#define NS_LFN 0x02 /* Force to create LFN entry */
shimniok	0:826c6171fc1b	167	#define NS_LAST 0x04 /* Last segment */
shimniok	0:826c6171fc1b	168	#define NS_BODY 0x08 /* Lower case flag (body) */
shimniok	0:826c6171fc1b	169	#define NS_EXT 0x10 /* Lower case flag (ext) */
shimniok	0:826c6171fc1b	170	#define NS_DOT 0x20 /* Dot entry */
shimniok	0:826c6171fc1b	171
shimniok	0:826c6171fc1b	172
shimniok	0:826c6171fc1b	173
shimniok	0:826c6171fc1b	174	/------------------------------------------------------------/
shimniok	0:826c6171fc1b	175	/* Work area */
shimniok	0:826c6171fc1b	176
shimniok	0:826c6171fc1b	177	#if !_DRIVES
shimniok	0:826c6171fc1b	178	#error Number of drives must not be 0.
shimniok	0:826c6171fc1b	179	#endif
shimniok	0:826c6171fc1b	180	static
shimniok	0:826c6171fc1b	181	WORD Fsid; /* File system mount ID */
shimniok	0:826c6171fc1b	182	static
shimniok	0:826c6171fc1b	183	FATFS FatFs[_DRIVES]; / Pointer to the file system objects (logical drives) */
shimniok	0:826c6171fc1b	184
shimniok	0:826c6171fc1b	185	#if _FS_RPATH
shimniok	0:826c6171fc1b	186	static
shimniok	0:826c6171fc1b	187	BYTE Drive; /* Current drive */
shimniok	0:826c6171fc1b	188	#endif
shimniok	0:826c6171fc1b	189
shimniok	0:826c6171fc1b	190
shimniok	0:826c6171fc1b	191	#if _USE_LFN == 0 /* No LFN */
shimniok	0:826c6171fc1b	192	#define DEF_NAMEBUF BYTE sfn[12]
shimniok	0:826c6171fc1b	193	#define INIT_BUF(dobj) (dobj).fn = sfn
shimniok	0:826c6171fc1b	194	#define FREE_BUF()
shimniok	0:826c6171fc1b	195
shimniok	0:826c6171fc1b	196	#elif _USE_LFN == 1 /* LFN with static LFN working buffer */
shimniok	0:826c6171fc1b	197	static WCHAR LfnBuf[_MAX_LFN + 1];
shimniok	0:826c6171fc1b	198	#define DEF_NAMEBUF BYTE sfn[12]
shimniok	0:826c6171fc1b	199	#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = LfnBuf; }
shimniok	0:826c6171fc1b	200	#define FREE_BUF()
shimniok	0:826c6171fc1b	201
shimniok	0:826c6171fc1b	202	#elif _USE_LFN == 2 /* LFN with dynamic LFN working buffer on the stack */
shimniok	0:826c6171fc1b	203	#define DEF_NAMEBUF BYTE sfn[12]; WCHAR lbuf[_MAX_LFN + 1]
shimniok	0:826c6171fc1b	204	#define INIT_BUF(dobj) { (dobj).fn = sfn; (dobj).lfn = lbuf; }
shimniok	0:826c6171fc1b	205	#define FREE_BUF()
shimniok	0:826c6171fc1b	206
shimniok	0:826c6171fc1b	207	#elif _USE_LFN == 3 /* LFN with dynamic LFN working buffer on the heap */
shimniok	0:826c6171fc1b	208	#define DEF_NAMEBUF BYTE sfn[12]; WCHAR *lfn
shimniok	0:826c6171fc1b	209	#define INIT_BUF(dobj) { lfn = ff_memalloc((_MAX_LFN + 1) * 2); \
shimniok	0:826c6171fc1b	210	if (!lfn) LEAVE_FF((dobj).fs, FR_NOT_ENOUGH_CORE); \
shimniok	0:826c6171fc1b	211	(dobj).lfn = lfn; (dobj).fn = sfn; }
shimniok	0:826c6171fc1b	212	#define FREE_BUF() ff_memfree(lfn)
shimniok	0:826c6171fc1b	213
shimniok	0:826c6171fc1b	214	#else
shimniok	0:826c6171fc1b	215	#error Wrong LFN configuration.
shimniok	0:826c6171fc1b	216	#endif
shimniok	0:826c6171fc1b	217
shimniok	0:826c6171fc1b	218
shimniok	0:826c6171fc1b	219
shimniok	0:826c6171fc1b	220
shimniok	0:826c6171fc1b	221	/*--------------------------------------------------------------------------
shimniok	0:826c6171fc1b	222
shimniok	0:826c6171fc1b	223	Module Private Functions
shimniok	0:826c6171fc1b	224
shimniok	0:826c6171fc1b	225	---------------------------------------------------------------------------*/
shimniok	0:826c6171fc1b	226
shimniok	0:826c6171fc1b	227
shimniok	0:826c6171fc1b	228	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	229	/* String functions */
shimniok	0:826c6171fc1b	230	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	231
shimniok	0:826c6171fc1b	232	/* Copy memory to memory */
shimniok	0:826c6171fc1b	233	static
shimniok	0:826c6171fc1b	234	void mem_cpy (void* dst, const void* src, int cnt) {
shimniok	0:826c6171fc1b	235	BYTE d = (BYTE)dst;
shimniok	0:826c6171fc1b	236	const BYTE s = (const BYTE)src;
shimniok	0:826c6171fc1b	237
shimniok	0:826c6171fc1b	238	#if _WORD_ACCESS == 1
shimniok	0:826c6171fc1b	239	while (cnt >= sizeof(int)) {
shimniok	0:826c6171fc1b	240	(int)d = (int)s;
shimniok	0:826c6171fc1b	241	d += sizeof(int); s += sizeof(int);
shimniok	0:826c6171fc1b	242	cnt -= sizeof(int);
shimniok	0:826c6171fc1b	243	}
shimniok	0:826c6171fc1b	244	#endif
shimniok	0:826c6171fc1b	245	while (cnt--)
shimniok	0:826c6171fc1b	246	d++ = s++;
shimniok	0:826c6171fc1b	247	}
shimniok	0:826c6171fc1b	248
shimniok	0:826c6171fc1b	249	/* Fill memory */
shimniok	0:826c6171fc1b	250	static
shimniok	0:826c6171fc1b	251	void mem_set (void* dst, int val, int cnt) {
shimniok	0:826c6171fc1b	252	BYTE d = (BYTE)dst;
shimniok	0:826c6171fc1b	253
shimniok	0:826c6171fc1b	254	while (cnt--)
shimniok	0:826c6171fc1b	255	*d++ = (BYTE)val;
shimniok	0:826c6171fc1b	256	}
shimniok	0:826c6171fc1b	257
shimniok	0:826c6171fc1b	258	/* Compare memory to memory */
shimniok	0:826c6171fc1b	259	static
shimniok	0:826c6171fc1b	260	int mem_cmp (const void* dst, const void* src, int cnt) {
shimniok	0:826c6171fc1b	261	const BYTE d = (const BYTE )dst, s = (const BYTE )src;
shimniok	0:826c6171fc1b	262	int r = 0;
shimniok	0:826c6171fc1b	263
shimniok	0:826c6171fc1b	264	while (cnt-- && (r = d++ - s++) == 0) ;
shimniok	0:826c6171fc1b	265	return r;
shimniok	0:826c6171fc1b	266	}
shimniok	0:826c6171fc1b	267
shimniok	0:826c6171fc1b	268	/* Check if chr is contained in the string */
shimniok	0:826c6171fc1b	269	static
shimniok	0:826c6171fc1b	270	int chk_chr (const char* str, int chr) {
shimniok	0:826c6171fc1b	271	while (str && str != chr) str++;
shimniok	0:826c6171fc1b	272	return *str;
shimniok	0:826c6171fc1b	273	}
shimniok	0:826c6171fc1b	274
shimniok	0:826c6171fc1b	275
shimniok	0:826c6171fc1b	276
shimniok	0:826c6171fc1b	277	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	278	/* Request/Release grant to access the volume */
shimniok	0:826c6171fc1b	279	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	280	#if _FS_REENTRANT
shimniok	0:826c6171fc1b	281
shimniok	0:826c6171fc1b	282	static
shimniok	0:826c6171fc1b	283	int lock_fs (
shimniok	0:826c6171fc1b	284	FATFS fs / File system object */
shimniok	0:826c6171fc1b	285	)
shimniok	0:826c6171fc1b	286	{
shimniok	0:826c6171fc1b	287	return ff_req_grant(fs->sobj);
shimniok	0:826c6171fc1b	288	}
shimniok	0:826c6171fc1b	289
shimniok	0:826c6171fc1b	290
shimniok	0:826c6171fc1b	291	static
shimniok	0:826c6171fc1b	292	void unlock_fs (
shimniok	0:826c6171fc1b	293	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	294	FRESULT res /* Result code to be returned */
shimniok	0:826c6171fc1b	295	)
shimniok	0:826c6171fc1b	296	{
shimniok	0:826c6171fc1b	297	if (res != FR_NOT_ENABLED &&
shimniok	0:826c6171fc1b	298	res != FR_INVALID_DRIVE &&
shimniok	0:826c6171fc1b	299	res != FR_INVALID_OBJECT &&
shimniok	0:826c6171fc1b	300	res != FR_TIMEOUT) {
shimniok	0:826c6171fc1b	301	ff_rel_grant(fs->sobj);
shimniok	0:826c6171fc1b	302	}
shimniok	0:826c6171fc1b	303	}
shimniok	0:826c6171fc1b	304	#endif
shimniok	0:826c6171fc1b	305
shimniok	0:826c6171fc1b	306
shimniok	0:826c6171fc1b	307
shimniok	0:826c6171fc1b	308	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	309	/* File shareing control functions */
shimniok	0:826c6171fc1b	310	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	311	#if _FS_SHARE
shimniok	0:826c6171fc1b	312
shimniok	0:826c6171fc1b	313	static
shimniok	0:826c6171fc1b	314	FRESULT chk_lock ( /* Check if the file can be accessed */
shimniok	0:826c6171fc1b	315	FAT_DIR* dj, /* Directory object pointing the file to be checked */
shimniok	0:826c6171fc1b	316	int acc /* Desired access (0:Read, 1:Write, 2:Delete/Rename) */
shimniok	0:826c6171fc1b	317	)
shimniok	0:826c6171fc1b	318	{
shimniok	0:826c6171fc1b	319	UINT i, be;
shimniok	0:826c6171fc1b	320
shimniok	0:826c6171fc1b	321	/* Search file semaphore table */
shimniok	0:826c6171fc1b	322	for (i = be = 0; i < _FS_SHARE; i++) {
shimniok	0:826c6171fc1b	323	if (dj->fs->flsem[i].ctr) { /* Existing entry */
shimniok	0:826c6171fc1b	324	if (dj->fs->flsem[i].clu == dj->sclust && /* The file is found (identified with its location) */
shimniok	0:826c6171fc1b	325	dj->fs->flsem[i].idx == dj->index) break;
shimniok	0:826c6171fc1b	326	} else { /* Blank entry */
shimniok	0:826c6171fc1b	327	be++;
shimniok	0:826c6171fc1b	328	}
shimniok	0:826c6171fc1b	329	}
shimniok	0:826c6171fc1b	330	if (i == _FS_SHARE) /* The file has not been opened */
shimniok	0:826c6171fc1b	331	return (be \|\| acc != 2) ? FR_OK : FR_TOO_MANY_OPEN_FILES; /* Is there a blank entry for new file? */
shimniok	0:826c6171fc1b	332
shimniok	0:826c6171fc1b	333	/* The file has been opened. Reject any open against writing file and all write mode open */
shimniok	0:826c6171fc1b	334	return (acc \|\| dj->fs->flsem[i].ctr == 0x100) ? FR_LOCKED : FR_OK;
shimniok	0:826c6171fc1b	335	}
shimniok	0:826c6171fc1b	336
shimniok	0:826c6171fc1b	337
shimniok	0:826c6171fc1b	338	static
shimniok	0:826c6171fc1b	339	int enq_lock ( /* Check if an entry is available for a new file */
shimniok	0:826c6171fc1b	340	FATFS* fs /* File system object */
shimniok	0:826c6171fc1b	341	)
shimniok	0:826c6171fc1b	342	{
shimniok	0:826c6171fc1b	343	UINT i;
shimniok	0:826c6171fc1b	344
shimniok	0:826c6171fc1b	345	for (i = 0; i < _FS_SHARE && fs->flsem[i].ctr; i++) ;
shimniok	0:826c6171fc1b	346	return (i == _FS_SHARE) ? 0 : 1;
shimniok	0:826c6171fc1b	347	}
shimniok	0:826c6171fc1b	348
shimniok	0:826c6171fc1b	349
shimniok	0:826c6171fc1b	350	static
shimniok	0:826c6171fc1b	351	UINT inc_lock ( /* Increment file open counter and returns its index (0:int error) */
shimniok	0:826c6171fc1b	352	FAT_DIR* dj, /* Directory object pointing the file to register or increment */
shimniok	0:826c6171fc1b	353	int acc /* Desired access mode (0:Read, !0:Write) */
shimniok	0:826c6171fc1b	354	)
shimniok	0:826c6171fc1b	355	{
shimniok	0:826c6171fc1b	356	UINT i;
shimniok	0:826c6171fc1b	357
shimniok	0:826c6171fc1b	358
shimniok	0:826c6171fc1b	359	for (i = 0; i < _FS_SHARE; i++) { /* Find the file */
shimniok	0:826c6171fc1b	360	if (dj->fs->flsem[i].ctr &&
shimniok	0:826c6171fc1b	361	dj->fs->flsem[i].clu == dj->sclust &&
shimniok	0:826c6171fc1b	362	dj->fs->flsem[i].idx == dj->index) break;
shimniok	0:826c6171fc1b	363	}
shimniok	0:826c6171fc1b	364
shimniok	0:826c6171fc1b	365	if (i == _FS_SHARE) { /* Not opened. Register it as new. */
shimniok	0:826c6171fc1b	366	for (i = 0; i < _FS_SHARE && dj->fs->flsem[i].ctr; i++) ;
shimniok	0:826c6171fc1b	367	if (i == _FS_SHARE) return 0; /* No space to register (int err) */
shimniok	0:826c6171fc1b	368	dj->fs->flsem[i].clu = dj->sclust;
shimniok	0:826c6171fc1b	369	dj->fs->flsem[i].idx = dj->index;
shimniok	0:826c6171fc1b	370	}
shimniok	0:826c6171fc1b	371
shimniok	0:826c6171fc1b	372	if (acc && dj->fs->flsem[i].ctr) return 0; /* Access violation (int err) */
shimniok	0:826c6171fc1b	373
shimniok	0:826c6171fc1b	374	dj->fs->flsem[i].ctr = acc ? 0x100 : dj->fs->flsem[i].ctr + 1; /* Set semaphore value */
shimniok	0:826c6171fc1b	375
shimniok	0:826c6171fc1b	376	return i + 1;
shimniok	0:826c6171fc1b	377	}
shimniok	0:826c6171fc1b	378
shimniok	0:826c6171fc1b	379
shimniok	0:826c6171fc1b	380	static
shimniok	0:826c6171fc1b	381	FRESULT dec_lock ( /* Decrement file open counter */
shimniok	0:826c6171fc1b	382	FATFS* fs, /* File system object */
shimniok	0:826c6171fc1b	383	UINT i /* Semaphore index */
shimniok	0:826c6171fc1b	384	)
shimniok	0:826c6171fc1b	385	{
shimniok	0:826c6171fc1b	386	WORD n;
shimniok	0:826c6171fc1b	387	FRESULT res;
shimniok	0:826c6171fc1b	388
shimniok	0:826c6171fc1b	389
shimniok	0:826c6171fc1b	390	if (--i < _FS_SHARE) {
shimniok	0:826c6171fc1b	391	n = fs->flsem[i].ctr;
shimniok	0:826c6171fc1b	392	if (n >= 0x100) n = 0;
shimniok	0:826c6171fc1b	393	if (n) n--;
shimniok	0:826c6171fc1b	394	fs->flsem[i].ctr = n;
shimniok	0:826c6171fc1b	395	res = FR_OK;
shimniok	0:826c6171fc1b	396	} else {
shimniok	0:826c6171fc1b	397	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	398	}
shimniok	0:826c6171fc1b	399	return res;
shimniok	0:826c6171fc1b	400	}
shimniok	0:826c6171fc1b	401
shimniok	0:826c6171fc1b	402	#endif
shimniok	0:826c6171fc1b	403
shimniok	0:826c6171fc1b	404
shimniok	0:826c6171fc1b	405
shimniok	0:826c6171fc1b	406	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	407	/* Change window offset */
shimniok	0:826c6171fc1b	408	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	409
shimniok	0:826c6171fc1b	410	static
shimniok	0:826c6171fc1b	411	FRESULT move_window (
shimniok	0:826c6171fc1b	412	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	413	DWORD sector /* Sector number to make appearance in the fs->win[] */
shimniok	0:826c6171fc1b	414	) /* Move to zero only writes back dirty window */
shimniok	0:826c6171fc1b	415	{
shimniok	0:826c6171fc1b	416	DWORD wsect;
shimniok	0:826c6171fc1b	417
shimniok	0:826c6171fc1b	418
shimniok	0:826c6171fc1b	419	wsect = fs->winsect;
shimniok	0:826c6171fc1b	420	if (wsect != sector) { /* Changed current window */
shimniok	0:826c6171fc1b	421	#if !_FS_READONLY
shimniok	0:826c6171fc1b	422	if (fs->wflag) { /* Write back dirty window if needed */
shimniok	0:826c6171fc1b	423	if (disk_write(fs->drv, fs->win, wsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	424	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	425	fs->wflag = 0;
shimniok	0:826c6171fc1b	426	if (wsect < (fs->fatbase + fs->fsize)) { /* In FAT area */
shimniok	0:826c6171fc1b	427	BYTE nf;
shimniok	0:826c6171fc1b	428	for (nf = fs->n_fats; nf > 1; nf--) { /* Reflect the change to all FAT copies */
shimniok	0:826c6171fc1b	429	wsect += fs->fsize;
shimniok	0:826c6171fc1b	430	disk_write(fs->drv, fs->win, wsect, 1);
shimniok	0:826c6171fc1b	431	}
shimniok	0:826c6171fc1b	432	}
shimniok	0:826c6171fc1b	433	}
shimniok	0:826c6171fc1b	434	#endif
shimniok	0:826c6171fc1b	435	if (sector) {
shimniok	0:826c6171fc1b	436	if (disk_read(fs->drv, fs->win, sector, 1) != RES_OK)
shimniok	0:826c6171fc1b	437	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	438	fs->winsect = sector;
shimniok	0:826c6171fc1b	439	}
shimniok	0:826c6171fc1b	440	}
shimniok	0:826c6171fc1b	441
shimniok	0:826c6171fc1b	442	return FR_OK;
shimniok	0:826c6171fc1b	443	}
shimniok	0:826c6171fc1b	444
shimniok	0:826c6171fc1b	445
shimniok	0:826c6171fc1b	446
shimniok	0:826c6171fc1b	447
shimniok	0:826c6171fc1b	448	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	449	/* Clean-up cached data */
shimniok	0:826c6171fc1b	450	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	451	#if !_FS_READONLY
shimniok	0:826c6171fc1b	452	static
shimniok	0:826c6171fc1b	453	FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
shimniok	0:826c6171fc1b	454	FATFS fs / File system object */
shimniok	0:826c6171fc1b	455	)
shimniok	0:826c6171fc1b	456	{
shimniok	0:826c6171fc1b	457	FRESULT res;
shimniok	0:826c6171fc1b	458
shimniok	0:826c6171fc1b	459
shimniok	0:826c6171fc1b	460	res = move_window(fs, 0);
shimniok	0:826c6171fc1b	461	if (res == FR_OK) {
shimniok	0:826c6171fc1b	462	/* Update FSInfo sector if needed */
shimniok	0:826c6171fc1b	463	if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
shimniok	0:826c6171fc1b	464	fs->winsect = 0;
shimniok	0:826c6171fc1b	465	mem_set(fs->win, 0, 512);
shimniok	0:826c6171fc1b	466	ST_WORD(fs->win+BS_55AA, 0xAA55);
shimniok	0:826c6171fc1b	467	ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
shimniok	0:826c6171fc1b	468	ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
shimniok	0:826c6171fc1b	469	ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
shimniok	0:826c6171fc1b	470	ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
shimniok	0:826c6171fc1b	471	disk_write(fs->drv, fs->win, fs->fsi_sector, 1);
shimniok	0:826c6171fc1b	472	fs->fsi_flag = 0;
shimniok	0:826c6171fc1b	473	}
shimniok	0:826c6171fc1b	474	/* Make sure that no pending write process in the physical drive */
shimniok	0:826c6171fc1b	475	if (disk_ioctl(fs->drv, CTRL_SYNC, (void*)0) != RES_OK)
shimniok	0:826c6171fc1b	476	res = FR_DISK_ERR;
shimniok	0:826c6171fc1b	477	}
shimniok	0:826c6171fc1b	478
shimniok	0:826c6171fc1b	479	return res;
shimniok	0:826c6171fc1b	480	}
shimniok	0:826c6171fc1b	481	#endif
shimniok	0:826c6171fc1b	482
shimniok	0:826c6171fc1b	483
shimniok	0:826c6171fc1b	484
shimniok	0:826c6171fc1b	485
shimniok	0:826c6171fc1b	486	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	487	/* FAT access - Read value of a FAT entry */
shimniok	0:826c6171fc1b	488	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	489
shimniok	0:826c6171fc1b	490
shimniok	0:826c6171fc1b	491	DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Internal error, Else:Cluster status */
shimniok	0:826c6171fc1b	492	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	493	DWORD clst /* Cluster# to get the link information */
shimniok	0:826c6171fc1b	494	)
shimniok	0:826c6171fc1b	495	{
shimniok	0:826c6171fc1b	496	UINT wc, bc;
shimniok	0:826c6171fc1b	497	BYTE *p;
shimniok	0:826c6171fc1b	498
shimniok	0:826c6171fc1b	499
shimniok	0:826c6171fc1b	500	if (clst < 2 \|\| clst >= fs->n_fatent) /* Chack range */
shimniok	0:826c6171fc1b	501	return 1;
shimniok	0:826c6171fc1b	502
shimniok	0:826c6171fc1b	503	switch (fs->fs_type) {
shimniok	0:826c6171fc1b	504	case FS_FAT12 :
shimniok	0:826c6171fc1b	505	bc = (UINT)clst; bc += bc / 2;
shimniok	0:826c6171fc1b	506	if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
shimniok	0:826c6171fc1b	507	wc = fs->win[bc % SS(fs)]; bc++;
shimniok	0:826c6171fc1b	508	if (move_window(fs, fs->fatbase + (bc / SS(fs)))) break;
shimniok	0:826c6171fc1b	509	wc \|= fs->win[bc % SS(fs)] << 8;
shimniok	0:826c6171fc1b	510	return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
shimniok	0:826c6171fc1b	511
shimniok	0:826c6171fc1b	512	case FS_FAT16 :
shimniok	0:826c6171fc1b	513	if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)))) break;
shimniok	0:826c6171fc1b	514	p = &fs->win[clst * 2 % SS(fs)];
shimniok	0:826c6171fc1b	515	return LD_WORD(p);
shimniok	0:826c6171fc1b	516
shimniok	0:826c6171fc1b	517	case FS_FAT32 :
shimniok	0:826c6171fc1b	518	if (move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)))) break;
shimniok	0:826c6171fc1b	519	p = &fs->win[clst * 4 % SS(fs)];
shimniok	0:826c6171fc1b	520	return LD_DWORD(p) & 0x0FFFFFFF;
shimniok	0:826c6171fc1b	521	}
shimniok	0:826c6171fc1b	522
shimniok	0:826c6171fc1b	523	return 0xFFFFFFFF; /* An error occurred at the disk I/O layer */
shimniok	0:826c6171fc1b	524	}
shimniok	0:826c6171fc1b	525
shimniok	0:826c6171fc1b	526
shimniok	0:826c6171fc1b	527
shimniok	0:826c6171fc1b	528
shimniok	0:826c6171fc1b	529	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	530	/* FAT access - Change value of a FAT entry */
shimniok	0:826c6171fc1b	531	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	532	#if !_FS_READONLY
shimniok	0:826c6171fc1b	533
shimniok	0:826c6171fc1b	534	FRESULT put_fat (
shimniok	0:826c6171fc1b	535	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	536	DWORD clst, /* Cluster# to be changed in range of 2 to fs->n_fatent - 1 */
shimniok	0:826c6171fc1b	537	DWORD val /* New value to mark the cluster */
shimniok	0:826c6171fc1b	538	)
shimniok	0:826c6171fc1b	539	{
shimniok	0:826c6171fc1b	540	UINT bc;
shimniok	0:826c6171fc1b	541	BYTE *p;
shimniok	0:826c6171fc1b	542	FRESULT res;
shimniok	0:826c6171fc1b	543
shimniok	0:826c6171fc1b	544
shimniok	0:826c6171fc1b	545	if (clst < 2 \|\| clst >= fs->n_fatent) { /* Check range */
shimniok	0:826c6171fc1b	546	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	547
shimniok	0:826c6171fc1b	548	} else {
shimniok	0:826c6171fc1b	549	switch (fs->fs_type) {
shimniok	0:826c6171fc1b	550	case FS_FAT12 :
shimniok	0:826c6171fc1b	551	bc = clst; bc += bc / 2;
shimniok	0:826c6171fc1b	552	res = move_window(fs, fs->fatbase + (bc / SS(fs)));
shimniok	0:826c6171fc1b	553	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	554	p = &fs->win[bc % SS(fs)];
shimniok	0:826c6171fc1b	555	p = (clst & 1) ? ((p & 0x0F) \| ((BYTE)val << 4)) : (BYTE)val;
shimniok	0:826c6171fc1b	556	bc++;
shimniok	0:826c6171fc1b	557	fs->wflag = 1;
shimniok	0:826c6171fc1b	558	res = move_window(fs, fs->fatbase + (bc / SS(fs)));
shimniok	0:826c6171fc1b	559	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	560	p = &fs->win[bc % SS(fs)];
shimniok	0:826c6171fc1b	561	p = (clst & 1) ? (BYTE)(val >> 4) : ((p & 0xF0) \| ((BYTE)(val >> 8) & 0x0F));
shimniok	0:826c6171fc1b	562	break;
shimniok	0:826c6171fc1b	563
shimniok	0:826c6171fc1b	564	case FS_FAT16 :
shimniok	0:826c6171fc1b	565	res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 2)));
shimniok	0:826c6171fc1b	566	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	567	p = &fs->win[clst * 2 % SS(fs)];
shimniok	0:826c6171fc1b	568	ST_WORD(p, (WORD)val);
shimniok	0:826c6171fc1b	569	break;
shimniok	0:826c6171fc1b	570
shimniok	0:826c6171fc1b	571	case FS_FAT32 :
shimniok	0:826c6171fc1b	572	res = move_window(fs, fs->fatbase + (clst / (SS(fs) / 4)));
shimniok	0:826c6171fc1b	573	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	574	p = &fs->win[clst * 4 % SS(fs)];
shimniok	0:826c6171fc1b	575	val \|= LD_DWORD(p) & 0xF0000000;
shimniok	0:826c6171fc1b	576	ST_DWORD(p, val);
shimniok	0:826c6171fc1b	577	break;
shimniok	0:826c6171fc1b	578
shimniok	0:826c6171fc1b	579	default :
shimniok	0:826c6171fc1b	580	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	581	}
shimniok	0:826c6171fc1b	582	fs->wflag = 1;
shimniok	0:826c6171fc1b	583	}
shimniok	0:826c6171fc1b	584
shimniok	0:826c6171fc1b	585	return res;
shimniok	0:826c6171fc1b	586	}
shimniok	0:826c6171fc1b	587	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	588
shimniok	0:826c6171fc1b	589
shimniok	0:826c6171fc1b	590
shimniok	0:826c6171fc1b	591
shimniok	0:826c6171fc1b	592	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	593	/* FAT handling - Remove a cluster chain */
shimniok	0:826c6171fc1b	594	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	595	#if !_FS_READONLY
shimniok	0:826c6171fc1b	596	static
shimniok	0:826c6171fc1b	597	FRESULT remove_chain (
shimniok	0:826c6171fc1b	598	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	599	DWORD clst /* Cluster# to remove a chain from */
shimniok	0:826c6171fc1b	600	)
shimniok	0:826c6171fc1b	601	{
shimniok	0:826c6171fc1b	602	FRESULT res;
shimniok	0:826c6171fc1b	603	DWORD nxt;
shimniok	0:826c6171fc1b	604
shimniok	0:826c6171fc1b	605
shimniok	0:826c6171fc1b	606	if (clst < 2 \|\| clst >= fs->n_fatent) { /* Check range */
shimniok	0:826c6171fc1b	607	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	608
shimniok	0:826c6171fc1b	609	} else {
shimniok	0:826c6171fc1b	610	res = FR_OK;
shimniok	0:826c6171fc1b	611	while (clst < fs->n_fatent) { /* Not a last link? */
shimniok	0:826c6171fc1b	612	nxt = get_fat(fs, clst); /* Get cluster status */
shimniok	0:826c6171fc1b	613	if (nxt == 0) break; /* Empty cluster? */
shimniok	0:826c6171fc1b	614	if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
shimniok	0:826c6171fc1b	615	if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
shimniok	0:826c6171fc1b	616	res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
shimniok	0:826c6171fc1b	617	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	618	if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
shimniok	0:826c6171fc1b	619	fs->free_clust++;
shimniok	0:826c6171fc1b	620	fs->fsi_flag = 1;
shimniok	0:826c6171fc1b	621	}
shimniok	0:826c6171fc1b	622	clst = nxt; /* Next cluster */
shimniok	0:826c6171fc1b	623	}
shimniok	0:826c6171fc1b	624	}
shimniok	0:826c6171fc1b	625
shimniok	0:826c6171fc1b	626	return res;
shimniok	0:826c6171fc1b	627	}
shimniok	0:826c6171fc1b	628	#endif
shimniok	0:826c6171fc1b	629
shimniok	0:826c6171fc1b	630
shimniok	0:826c6171fc1b	631
shimniok	0:826c6171fc1b	632
shimniok	0:826c6171fc1b	633	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	634	/* FAT handling - Stretch or Create a cluster chain */
shimniok	0:826c6171fc1b	635	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	636	#if !_FS_READONLY
shimniok	0:826c6171fc1b	637	static
shimniok	0:826c6171fc1b	638	DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
shimniok	0:826c6171fc1b	639	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	640	DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
shimniok	0:826c6171fc1b	641	)
shimniok	0:826c6171fc1b	642	{
shimniok	0:826c6171fc1b	643	DWORD cs, ncl, scl;
shimniok	0:826c6171fc1b	644
shimniok	0:826c6171fc1b	645
shimniok	0:826c6171fc1b	646	if (clst == 0) { /* Create a new chain */
shimniok	0:826c6171fc1b	647	scl = fs->last_clust; /* Get suggested start point */
shimniok	0:826c6171fc1b	648	if (!scl \|\| scl >= fs->n_fatent) scl = 1;
shimniok	0:826c6171fc1b	649	}
shimniok	0:826c6171fc1b	650	else { /* Stretch the current chain */
shimniok	0:826c6171fc1b	651	cs = get_fat(fs, clst); /* Check the cluster status */
shimniok	0:826c6171fc1b	652	if (cs < 2) return 1; /* It is an invalid cluster */
shimniok	0:826c6171fc1b	653	if (cs < fs->n_fatent) return cs; /* It is already followed by next cluster */
shimniok	0:826c6171fc1b	654	scl = clst;
shimniok	0:826c6171fc1b	655	}
shimniok	0:826c6171fc1b	656
shimniok	0:826c6171fc1b	657	ncl = scl; /* Start cluster */
shimniok	0:826c6171fc1b	658	for (;;) {
shimniok	0:826c6171fc1b	659	ncl++; /* Next cluster */
shimniok	0:826c6171fc1b	660	if (ncl >= fs->n_fatent) { /* Wrap around */
shimniok	0:826c6171fc1b	661	ncl = 2;
shimniok	0:826c6171fc1b	662	if (ncl > scl) return 0; /* No free cluster */
shimniok	0:826c6171fc1b	663	}
shimniok	0:826c6171fc1b	664	cs = get_fat(fs, ncl); /* Get the cluster status */
shimniok	0:826c6171fc1b	665	if (cs == 0) break; /* Found a free cluster */
shimniok	0:826c6171fc1b	666	if (cs == 0xFFFFFFFF \|\| cs == 1)/* An error occurred */
shimniok	0:826c6171fc1b	667	return cs;
shimniok	0:826c6171fc1b	668	if (ncl == scl) return 0; /* No free cluster */
shimniok	0:826c6171fc1b	669	}
shimniok	0:826c6171fc1b	670
shimniok	0:826c6171fc1b	671	if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "last link" */
shimniok	0:826c6171fc1b	672	return 0xFFFFFFFF;
shimniok	0:826c6171fc1b	673	if (clst != 0) { /* Link it to the previous one if needed */
shimniok	0:826c6171fc1b	674	if (put_fat(fs, clst, ncl))
shimniok	0:826c6171fc1b	675	return 0xFFFFFFFF;
shimniok	0:826c6171fc1b	676	}
shimniok	0:826c6171fc1b	677
shimniok	0:826c6171fc1b	678	fs->last_clust = ncl; /* Update FSINFO */
shimniok	0:826c6171fc1b	679	if (fs->free_clust != 0xFFFFFFFF) {
shimniok	0:826c6171fc1b	680	fs->free_clust--;
shimniok	0:826c6171fc1b	681	fs->fsi_flag = 1;
shimniok	0:826c6171fc1b	682	}
shimniok	0:826c6171fc1b	683
shimniok	0:826c6171fc1b	684	return ncl; /* Return new cluster number */
shimniok	0:826c6171fc1b	685	}
shimniok	0:826c6171fc1b	686	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	687
shimniok	0:826c6171fc1b	688
shimniok	0:826c6171fc1b	689
shimniok	0:826c6171fc1b	690
shimniok	0:826c6171fc1b	691	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	692	/* Get sector# from cluster# */
shimniok	0:826c6171fc1b	693	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	694
shimniok	0:826c6171fc1b	695
shimniok	0:826c6171fc1b	696	DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
shimniok	0:826c6171fc1b	697	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	698	DWORD clst /* Cluster# to be converted */
shimniok	0:826c6171fc1b	699	)
shimniok	0:826c6171fc1b	700	{
shimniok	0:826c6171fc1b	701	clst -= 2;
shimniok	0:826c6171fc1b	702	if (clst >= (fs->n_fatent - 2)) return 0; /* Invalid cluster# */
shimniok	0:826c6171fc1b	703	return clst * fs->csize + fs->database;
shimniok	0:826c6171fc1b	704	}
shimniok	0:826c6171fc1b	705
shimniok	0:826c6171fc1b	706
shimniok	0:826c6171fc1b	707
shimniok	0:826c6171fc1b	708
shimniok	0:826c6171fc1b	709	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	710	/* Directory handling - Set directory index */
shimniok	0:826c6171fc1b	711	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	712
shimniok	0:826c6171fc1b	713	static
shimniok	0:826c6171fc1b	714	FRESULT dir_sdi (
shimniok	0:826c6171fc1b	715	FAT_DIR dj, / Pointer to directory object */
shimniok	0:826c6171fc1b	716	WORD idx /* Directory index number */
shimniok	0:826c6171fc1b	717	)
shimniok	0:826c6171fc1b	718	{
shimniok	0:826c6171fc1b	719	DWORD clst;
shimniok	0:826c6171fc1b	720	WORD ic;
shimniok	0:826c6171fc1b	721
shimniok	0:826c6171fc1b	722
shimniok	0:826c6171fc1b	723	dj->index = idx;
shimniok	0:826c6171fc1b	724	clst = dj->sclust;
shimniok	0:826c6171fc1b	725	if (clst == 1 \|\| clst >= dj->fs->n_fatent) /* Check start cluster range */
shimniok	0:826c6171fc1b	726	return FR_INT_ERR;
shimniok	0:826c6171fc1b	727	if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
shimniok	0:826c6171fc1b	728	clst = dj->fs->dirbase;
shimniok	0:826c6171fc1b	729
shimniok	0:826c6171fc1b	730	if (clst == 0) { /* Static table */
shimniok	0:826c6171fc1b	731	dj->clust = clst;
shimniok	0:826c6171fc1b	732	if (idx >= dj->fs->n_rootdir) /* Index is out of range */
shimniok	0:826c6171fc1b	733	return FR_INT_ERR;
shimniok	0:826c6171fc1b	734	dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
shimniok	0:826c6171fc1b	735	}
shimniok	0:826c6171fc1b	736	else { /* Dynamic table */
shimniok	0:826c6171fc1b	737	ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
shimniok	0:826c6171fc1b	738	while (idx >= ic) { /* Follow cluster chain */
shimniok	0:826c6171fc1b	739	clst = get_fat(dj->fs, clst); /* Get next cluster */
shimniok	0:826c6171fc1b	740	if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
shimniok	0:826c6171fc1b	741	if (clst < 2 \|\| clst >= dj->fs->n_fatent) /* Reached to end of table or int error */
shimniok	0:826c6171fc1b	742	return FR_INT_ERR;
shimniok	0:826c6171fc1b	743	idx -= ic;
shimniok	0:826c6171fc1b	744	}
shimniok	0:826c6171fc1b	745	dj->clust = clst;
shimniok	0:826c6171fc1b	746	dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
shimniok	0:826c6171fc1b	747	}
shimniok	0:826c6171fc1b	748
shimniok	0:826c6171fc1b	749	dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */
shimniok	0:826c6171fc1b	750
shimniok	0:826c6171fc1b	751	return FR_OK; /* Seek succeeded */
shimniok	0:826c6171fc1b	752	}
shimniok	0:826c6171fc1b	753
shimniok	0:826c6171fc1b	754
shimniok	0:826c6171fc1b	755
shimniok	0:826c6171fc1b	756
shimniok	0:826c6171fc1b	757	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	758	/* Directory handling - Move directory index next */
shimniok	0:826c6171fc1b	759	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	760
shimniok	0:826c6171fc1b	761	static
shimniok	0:826c6171fc1b	762	FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not stretch */
shimniok	0:826c6171fc1b	763	FAT_DIR dj, / Pointer to directory object */
shimniok	0:826c6171fc1b	764	int stretch /* 0: Do not stretch table, 1: Stretch table if needed */
shimniok	0:826c6171fc1b	765	)
shimniok	0:826c6171fc1b	766	{
shimniok	0:826c6171fc1b	767	DWORD clst;
shimniok	0:826c6171fc1b	768	WORD i;
shimniok	0:826c6171fc1b	769
shimniok	0:826c6171fc1b	770
shimniok	0:826c6171fc1b	771	i = dj->index + 1;
shimniok	0:826c6171fc1b	772	if (!i \|\| !dj->sect) /* Report EOT when index has reached 65535 */
shimniok	0:826c6171fc1b	773	return FR_NO_FILE;
shimniok	0:826c6171fc1b	774
shimniok	0:826c6171fc1b	775	if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
shimniok	0:826c6171fc1b	776	dj->sect++; /* Next sector */
shimniok	0:826c6171fc1b	777
shimniok	0:826c6171fc1b	778	if (dj->clust == 0) { /* Static table */
shimniok	0:826c6171fc1b	779	if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
shimniok	0:826c6171fc1b	780	return FR_NO_FILE;
shimniok	0:826c6171fc1b	781	}
shimniok	0:826c6171fc1b	782	else { /* Dynamic table */
shimniok	0:826c6171fc1b	783	if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
shimniok	0:826c6171fc1b	784	clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
shimniok	0:826c6171fc1b	785	if (clst <= 1) return FR_INT_ERR;
shimniok	0:826c6171fc1b	786	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
shimniok	0:826c6171fc1b	787	if (clst >= dj->fs->n_fatent) { /* When it reached end of dynamic table */
shimniok	0:826c6171fc1b	788	#if !_FS_READONLY
shimniok	0:826c6171fc1b	789	BYTE c;
shimniok	0:826c6171fc1b	790	if (!stretch) return FR_NO_FILE; /* When do not stretch, report EOT */
shimniok	0:826c6171fc1b	791	clst = create_chain(dj->fs, dj->clust); /* Stretch cluster chain */
shimniok	0:826c6171fc1b	792	if (clst == 0) return FR_DENIED; /* No free cluster */
shimniok	0:826c6171fc1b	793	if (clst == 1) return FR_INT_ERR;
shimniok	0:826c6171fc1b	794	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
shimniok	0:826c6171fc1b	795	/* Clean-up stretched table */
shimniok	0:826c6171fc1b	796	if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
shimniok	0:826c6171fc1b	797	mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
shimniok	0:826c6171fc1b	798	dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
shimniok	0:826c6171fc1b	799	for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
shimniok	0:826c6171fc1b	800	dj->fs->wflag = 1;
shimniok	0:826c6171fc1b	801	if (move_window(dj->fs, 0)) return FR_DISK_ERR;
shimniok	0:826c6171fc1b	802	dj->fs->winsect++;
shimniok	0:826c6171fc1b	803	}
shimniok	0:826c6171fc1b	804	dj->fs->winsect -= c; /* Rewind window address */
shimniok	0:826c6171fc1b	805	#else
shimniok	0:826c6171fc1b	806	return FR_NO_FILE; /* Report EOT */
shimniok	0:826c6171fc1b	807	#endif
shimniok	0:826c6171fc1b	808	}
shimniok	0:826c6171fc1b	809	dj->clust = clst; /* Initialize data for new cluster */
shimniok	0:826c6171fc1b	810	dj->sect = clust2sect(dj->fs, clst);
shimniok	0:826c6171fc1b	811	}
shimniok	0:826c6171fc1b	812	}
shimniok	0:826c6171fc1b	813	}
shimniok	0:826c6171fc1b	814
shimniok	0:826c6171fc1b	815	dj->index = i;
shimniok	0:826c6171fc1b	816	dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
shimniok	0:826c6171fc1b	817
shimniok	0:826c6171fc1b	818	return FR_OK;
shimniok	0:826c6171fc1b	819	}
shimniok	0:826c6171fc1b	820
shimniok	0:826c6171fc1b	821
shimniok	0:826c6171fc1b	822
shimniok	0:826c6171fc1b	823
shimniok	0:826c6171fc1b	824	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	825	/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
shimniok	0:826c6171fc1b	826	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	827	#if _USE_LFN
shimniok	0:826c6171fc1b	828	static
shimniok	0:826c6171fc1b	829	const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
shimniok	0:826c6171fc1b	830
shimniok	0:826c6171fc1b	831
shimniok	0:826c6171fc1b	832	static
shimniok	0:826c6171fc1b	833	int cmp_lfn ( /* 1:Matched, 0:Not matched */
shimniok	0:826c6171fc1b	834	WCHAR lfnbuf, / Pointer to the LFN to be compared */
shimniok	0:826c6171fc1b	835	BYTE dir / Pointer to the directory entry containing a part of LFN */
shimniok	0:826c6171fc1b	836	)
shimniok	0:826c6171fc1b	837	{
shimniok	0:826c6171fc1b	838	int i, s;
shimniok	0:826c6171fc1b	839	WCHAR wc, uc;
shimniok	0:826c6171fc1b	840
shimniok	0:826c6171fc1b	841
shimniok	0:826c6171fc1b	842	i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
shimniok	0:826c6171fc1b	843	s = 0; wc = 1;
shimniok	0:826c6171fc1b	844	do {
shimniok	0:826c6171fc1b	845	uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
shimniok	0:826c6171fc1b	846	if (wc) { /* Last char has not been processed */
shimniok	0:826c6171fc1b	847	wc = ff_wtoupper(uc); /* Convert it to upper case */
shimniok	0:826c6171fc1b	848	if (i >= _MAX_LFN \|\| wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
shimniok	0:826c6171fc1b	849	return 0; /* Not matched */
shimniok	0:826c6171fc1b	850	} else {
shimniok	0:826c6171fc1b	851	if (uc != 0xFFFF) return 0; /* Check filler */
shimniok	0:826c6171fc1b	852	}
shimniok	0:826c6171fc1b	853	} while (++s < 13); /* Repeat until all chars in the entry are checked */
shimniok	0:826c6171fc1b	854
shimniok	0:826c6171fc1b	855	if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
shimniok	0:826c6171fc1b	856	return 0;
shimniok	0:826c6171fc1b	857
shimniok	0:826c6171fc1b	858	return 1; /* The part of LFN matched */
shimniok	0:826c6171fc1b	859	}
shimniok	0:826c6171fc1b	860
shimniok	0:826c6171fc1b	861
shimniok	0:826c6171fc1b	862
shimniok	0:826c6171fc1b	863	static
shimniok	0:826c6171fc1b	864	int pick_lfn ( /* 1:Succeeded, 0:Buffer overflow */
shimniok	0:826c6171fc1b	865	WCHAR lfnbuf, / Pointer to the Unicode-LFN buffer */
shimniok	0:826c6171fc1b	866	BYTE dir / Pointer to the directory entry */
shimniok	0:826c6171fc1b	867	)
shimniok	0:826c6171fc1b	868	{
shimniok	0:826c6171fc1b	869	int i, s;
shimniok	0:826c6171fc1b	870	WCHAR wc, uc;
shimniok	0:826c6171fc1b	871
shimniok	0:826c6171fc1b	872
shimniok	0:826c6171fc1b	873	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
shimniok	0:826c6171fc1b	874
shimniok	0:826c6171fc1b	875	s = 0; wc = 1;
shimniok	0:826c6171fc1b	876	do {
shimniok	0:826c6171fc1b	877	uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
shimniok	0:826c6171fc1b	878	if (wc) { /* Last char has not been processed */
shimniok	0:826c6171fc1b	879	if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
shimniok	0:826c6171fc1b	880	lfnbuf[i++] = wc = uc; /* Store it */
shimniok	0:826c6171fc1b	881	} else {
shimniok	0:826c6171fc1b	882	if (uc != 0xFFFF) return 0; /* Check filler */
shimniok	0:826c6171fc1b	883	}
shimniok	0:826c6171fc1b	884	} while (++s < 13); /* Read all character in the entry */
shimniok	0:826c6171fc1b	885
shimniok	0:826c6171fc1b	886	if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
shimniok	0:826c6171fc1b	887	if (i >= _MAX_LFN) return 0; /* Buffer overflow? */
shimniok	0:826c6171fc1b	888	lfnbuf[i] = 0;
shimniok	0:826c6171fc1b	889	}
shimniok	0:826c6171fc1b	890
shimniok	0:826c6171fc1b	891	return 1;
shimniok	0:826c6171fc1b	892	}
shimniok	0:826c6171fc1b	893
shimniok	0:826c6171fc1b	894
shimniok	0:826c6171fc1b	895	#if !_FS_READONLY
shimniok	0:826c6171fc1b	896	static
shimniok	0:826c6171fc1b	897	void fit_lfn (
shimniok	0:826c6171fc1b	898	const WCHAR lfnbuf, / Pointer to the LFN buffer */
shimniok	0:826c6171fc1b	899	BYTE dir, / Pointer to the directory entry */
shimniok	0:826c6171fc1b	900	BYTE ord, /* LFN order (1-20) */
shimniok	0:826c6171fc1b	901	BYTE sum /* SFN sum */
shimniok	0:826c6171fc1b	902	)
shimniok	0:826c6171fc1b	903	{
shimniok	0:826c6171fc1b	904	int i, s;
shimniok	0:826c6171fc1b	905	WCHAR wc;
shimniok	0:826c6171fc1b	906
shimniok	0:826c6171fc1b	907
shimniok	0:826c6171fc1b	908	dir[LDIR_Chksum] = sum; /* Set check sum */
shimniok	0:826c6171fc1b	909	dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
shimniok	0:826c6171fc1b	910	dir[LDIR_Type] = 0;
shimniok	0:826c6171fc1b	911	ST_WORD(dir+LDIR_FstClusLO, 0);
shimniok	0:826c6171fc1b	912
shimniok	0:826c6171fc1b	913	i = (ord - 1) * 13; /* Get offset in the LFN buffer */
shimniok	0:826c6171fc1b	914	s = wc = 0;
shimniok	0:826c6171fc1b	915	do {
shimniok	0:826c6171fc1b	916	if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
shimniok	0:826c6171fc1b	917	ST_WORD(dir+LfnOfs[s], wc); /* Put it */
shimniok	0:826c6171fc1b	918	if (!wc) wc = 0xFFFF; /* Padding chars following last char */
shimniok	0:826c6171fc1b	919	} while (++s < 13);
shimniok	0:826c6171fc1b	920	if (wc == 0xFFFF \|\| !lfnbuf[i]) ord \|= 0x40; /* Bottom LFN part is the start of LFN sequence */
shimniok	0:826c6171fc1b	921	dir[LDIR_Ord] = ord; /* Set the LFN order */
shimniok	0:826c6171fc1b	922	}
shimniok	0:826c6171fc1b	923
shimniok	0:826c6171fc1b	924	#endif
shimniok	0:826c6171fc1b	925	#endif
shimniok	0:826c6171fc1b	926
shimniok	0:826c6171fc1b	927
shimniok	0:826c6171fc1b	928
shimniok	0:826c6171fc1b	929	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	930	/* Create numbered name */
shimniok	0:826c6171fc1b	931	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	932	#if _USE_LFN
shimniok	0:826c6171fc1b	933	void gen_numname (
shimniok	0:826c6171fc1b	934	BYTE dst, / Pointer to generated SFN */
shimniok	0:826c6171fc1b	935	const BYTE src, / Pointer to source SFN to be modified */
shimniok	0:826c6171fc1b	936	const WCHAR lfn, / Pointer to LFN */
shimniok	0:826c6171fc1b	937	WORD seq /* Sequence number */
shimniok	0:826c6171fc1b	938	)
shimniok	0:826c6171fc1b	939	{
shimniok	0:826c6171fc1b	940	BYTE ns[8], c;
shimniok	0:826c6171fc1b	941	int i, j;
shimniok	0:826c6171fc1b	942
shimniok	0:826c6171fc1b	943
shimniok	0:826c6171fc1b	944	mem_cpy(dst, src, 11);
shimniok	0:826c6171fc1b	945
shimniok	0:826c6171fc1b	946	if (seq > 5) { /* On many collisions, generate a hash number instead of sequential number */
shimniok	0:826c6171fc1b	947	do seq = (seq >> 1) + (seq << 15) + (WORD)lfn++; while (lfn);
shimniok	0:826c6171fc1b	948	}
shimniok	0:826c6171fc1b	949
shimniok	0:826c6171fc1b	950	/* itoa */
shimniok	0:826c6171fc1b	951	i = 7;
shimniok	0:826c6171fc1b	952	do {
shimniok	0:826c6171fc1b	953	c = (seq % 16) + '0';
shimniok	0:826c6171fc1b	954	if (c > '9') c += 7;
shimniok	0:826c6171fc1b	955	ns[i--] = c;
shimniok	0:826c6171fc1b	956	seq /= 16;
shimniok	0:826c6171fc1b	957	} while (seq);
shimniok	0:826c6171fc1b	958	ns[i] = '~';
shimniok	0:826c6171fc1b	959
shimniok	0:826c6171fc1b	960	/* Append the number */
shimniok	0:826c6171fc1b	961	for (j = 0; j < i && dst[j] != ' '; j++) {
shimniok	0:826c6171fc1b	962	if (IsDBCS1(dst[j])) {
shimniok	0:826c6171fc1b	963	if (j == i - 1) break;
shimniok	0:826c6171fc1b	964	j++;
shimniok	0:826c6171fc1b	965	}
shimniok	0:826c6171fc1b	966	}
shimniok	0:826c6171fc1b	967	do {
shimniok	0:826c6171fc1b	968	dst[j++] = (i < 8) ? ns[i++] : ' ';
shimniok	0:826c6171fc1b	969	} while (j < 8);
shimniok	0:826c6171fc1b	970	}
shimniok	0:826c6171fc1b	971	#endif
shimniok	0:826c6171fc1b	972
shimniok	0:826c6171fc1b	973
shimniok	0:826c6171fc1b	974
shimniok	0:826c6171fc1b	975
shimniok	0:826c6171fc1b	976	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	977	/* Calculate sum of an SFN */
shimniok	0:826c6171fc1b	978	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	979	#if _USE_LFN
shimniok	0:826c6171fc1b	980	static
shimniok	0:826c6171fc1b	981	BYTE sum_sfn (
shimniok	0:826c6171fc1b	982	const BYTE dir / Ptr to directory entry */
shimniok	0:826c6171fc1b	983	)
shimniok	0:826c6171fc1b	984	{
shimniok	0:826c6171fc1b	985	BYTE sum = 0;
shimniok	0:826c6171fc1b	986	int n = 11;
shimniok	0:826c6171fc1b	987
shimniok	0:826c6171fc1b	988	do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
shimniok	0:826c6171fc1b	989	return sum;
shimniok	0:826c6171fc1b	990	}
shimniok	0:826c6171fc1b	991	#endif
shimniok	0:826c6171fc1b	992
shimniok	0:826c6171fc1b	993
shimniok	0:826c6171fc1b	994
shimniok	0:826c6171fc1b	995
shimniok	0:826c6171fc1b	996	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	997	/* Directory handling - Find an object in the directory */
shimniok	0:826c6171fc1b	998	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	999
shimniok	0:826c6171fc1b	1000	static
shimniok	0:826c6171fc1b	1001	FRESULT dir_find (
shimniok	0:826c6171fc1b	1002	FAT_DIR dj / Pointer to the directory object linked to the file name */
shimniok	0:826c6171fc1b	1003	)
shimniok	0:826c6171fc1b	1004	{
shimniok	0:826c6171fc1b	1005	FRESULT res;
shimniok	0:826c6171fc1b	1006	BYTE c, *dir;
shimniok	0:826c6171fc1b	1007	#if _USE_LFN
shimniok	0:826c6171fc1b	1008	BYTE a, ord, sum;
shimniok	0:826c6171fc1b	1009	#endif
shimniok	0:826c6171fc1b	1010
shimniok	0:826c6171fc1b	1011	res = dir_sdi(dj, 0); /* Rewind directory object */
shimniok	0:826c6171fc1b	1012	if (res != FR_OK) return res;
shimniok	0:826c6171fc1b	1013
shimniok	0:826c6171fc1b	1014	#if _USE_LFN
shimniok	0:826c6171fc1b	1015	ord = sum = 0xFF;
shimniok	0:826c6171fc1b	1016	#endif
shimniok	0:826c6171fc1b	1017	do {
shimniok	0:826c6171fc1b	1018	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1019	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1020	dir = dj->dir; /* Ptr to the directory entry of current index */
shimniok	0:826c6171fc1b	1021	c = dir[DIR_Name];
shimniok	0:826c6171fc1b	1022	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
shimniok	0:826c6171fc1b	1023	#if _USE_LFN /* LFN configuration */
shimniok	0:826c6171fc1b	1024	a = dir[DIR_Attr] & AM_MASK;
shimniok	0:826c6171fc1b	1025	if (c == 0xE5 \|\| ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
shimniok	0:826c6171fc1b	1026	ord = 0xFF;
shimniok	0:826c6171fc1b	1027	} else {
shimniok	0:826c6171fc1b	1028	if (a == AM_LFN) { /* An LFN entry is found */
shimniok	0:826c6171fc1b	1029	if (dj->lfn) {
shimniok	0:826c6171fc1b	1030	if (c & 0x40) { /* Is it start of LFN sequence? */
shimniok	0:826c6171fc1b	1031	sum = dir[LDIR_Chksum];
shimniok	0:826c6171fc1b	1032	c &= 0xBF; ord = c; /* LFN start order */
shimniok	0:826c6171fc1b	1033	dj->lfn_idx = dj->index;
shimniok	0:826c6171fc1b	1034	}
shimniok	0:826c6171fc1b	1035	/* Check validity of the LFN entry and compare it with given name */
shimniok	0:826c6171fc1b	1036	ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
shimniok	0:826c6171fc1b	1037	}
shimniok	0:826c6171fc1b	1038	} else { /* An SFN entry is found */
shimniok	0:826c6171fc1b	1039	if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
shimniok	0:826c6171fc1b	1040	ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
shimniok	0:826c6171fc1b	1041	if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
shimniok	0:826c6171fc1b	1042	}
shimniok	0:826c6171fc1b	1043	}
shimniok	0:826c6171fc1b	1044	#else /* Non LFN configuration */
shimniok	0:826c6171fc1b	1045	if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
shimniok	0:826c6171fc1b	1046	break;
shimniok	0:826c6171fc1b	1047	#endif
shimniok	0:826c6171fc1b	1048	res = dir_next(dj, 0); /* Next entry */
shimniok	0:826c6171fc1b	1049	} while (res == FR_OK);
shimniok	0:826c6171fc1b	1050
shimniok	0:826c6171fc1b	1051	return res;
shimniok	0:826c6171fc1b	1052	}
shimniok	0:826c6171fc1b	1053
shimniok	0:826c6171fc1b	1054
shimniok	0:826c6171fc1b	1055
shimniok	0:826c6171fc1b	1056
shimniok	0:826c6171fc1b	1057	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1058	/* Read an object from the directory */
shimniok	0:826c6171fc1b	1059	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1060	#if _FS_MINIMIZE <= 1
shimniok	0:826c6171fc1b	1061	static
shimniok	0:826c6171fc1b	1062	FRESULT dir_read (
shimniok	0:826c6171fc1b	1063	FAT_DIR dj / Pointer to the directory object that pointing the entry to be read */
shimniok	0:826c6171fc1b	1064	)
shimniok	0:826c6171fc1b	1065	{
shimniok	0:826c6171fc1b	1066	FRESULT res;
shimniok	0:826c6171fc1b	1067	BYTE c, *dir;
shimniok	0:826c6171fc1b	1068	#if _USE_LFN
shimniok	0:826c6171fc1b	1069	BYTE a, ord = 0xFF, sum = 0xFF;
shimniok	0:826c6171fc1b	1070	#endif
shimniok	0:826c6171fc1b	1071
shimniok	0:826c6171fc1b	1072	res = FR_NO_FILE;
shimniok	0:826c6171fc1b	1073	while (dj->sect) {
shimniok	0:826c6171fc1b	1074	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1075	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1076	dir = dj->dir; /* Ptr to the directory entry of current index */
shimniok	0:826c6171fc1b	1077	c = dir[DIR_Name];
shimniok	0:826c6171fc1b	1078	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
shimniok	0:826c6171fc1b	1079	#if _USE_LFN /* LFN configuration */
shimniok	0:826c6171fc1b	1080	a = dir[DIR_Attr] & AM_MASK;
shimniok	0:826c6171fc1b	1081	if (c == 0xE5 \|\| (!_FS_RPATH && c == '.') \|\| ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
shimniok	0:826c6171fc1b	1082	ord = 0xFF;
shimniok	0:826c6171fc1b	1083	} else {
shimniok	0:826c6171fc1b	1084	if (a == AM_LFN) { /* An LFN entry is found */
shimniok	0:826c6171fc1b	1085	if (c & 0x40) { /* Is it start of LFN sequence? */
shimniok	0:826c6171fc1b	1086	sum = dir[LDIR_Chksum];
shimniok	0:826c6171fc1b	1087	c &= 0xBF; ord = c;
shimniok	0:826c6171fc1b	1088	dj->lfn_idx = dj->index;
shimniok	0:826c6171fc1b	1089	}
shimniok	0:826c6171fc1b	1090	/* Check LFN validity and capture it */
shimniok	0:826c6171fc1b	1091	ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
shimniok	0:826c6171fc1b	1092	} else { /* An SFN entry is found */
shimniok	0:826c6171fc1b	1093	if (ord \|\| sum != sum_sfn(dir)) /* Is there a valid LFN? */
shimniok	0:826c6171fc1b	1094	dj->lfn_idx = 0xFFFF; /* It has no LFN. */
shimniok	0:826c6171fc1b	1095	break;
shimniok	0:826c6171fc1b	1096	}
shimniok	0:826c6171fc1b	1097	}
shimniok	0:826c6171fc1b	1098	#else /* Non LFN configuration */
shimniok	0:826c6171fc1b	1099	if (c != 0xE5 && (_FS_RPATH \|\| c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
shimniok	0:826c6171fc1b	1100	break;
shimniok	0:826c6171fc1b	1101	#endif
shimniok	0:826c6171fc1b	1102	res = dir_next(dj, 0); /* Next entry */
shimniok	0:826c6171fc1b	1103	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1104	}
shimniok	0:826c6171fc1b	1105
shimniok	0:826c6171fc1b	1106	if (res != FR_OK) dj->sect = 0;
shimniok	0:826c6171fc1b	1107
shimniok	0:826c6171fc1b	1108	return res;
shimniok	0:826c6171fc1b	1109	}
shimniok	0:826c6171fc1b	1110	#endif
shimniok	0:826c6171fc1b	1111
shimniok	0:826c6171fc1b	1112
shimniok	0:826c6171fc1b	1113
shimniok	0:826c6171fc1b	1114	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1115	/* Register an object to the directory */
shimniok	0:826c6171fc1b	1116	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1117	#if !_FS_READONLY
shimniok	0:826c6171fc1b	1118	static
shimniok	0:826c6171fc1b	1119	FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
shimniok	0:826c6171fc1b	1120	FAT_DIR dj / Target directory with object name to be created */
shimniok	0:826c6171fc1b	1121	)
shimniok	0:826c6171fc1b	1122	{
shimniok	0:826c6171fc1b	1123	FRESULT res;
shimniok	0:826c6171fc1b	1124	BYTE c, *dir;
shimniok	0:826c6171fc1b	1125	#if _USE_LFN /* LFN configuration */
shimniok	0:826c6171fc1b	1126	WORD n, ne, is;
shimniok	0:826c6171fc1b	1127	BYTE sn[12], *fn, sum;
shimniok	0:826c6171fc1b	1128	WCHAR *lfn;
shimniok	0:826c6171fc1b	1129
shimniok	0:826c6171fc1b	1130
shimniok	0:826c6171fc1b	1131	fn = dj->fn; lfn = dj->lfn;
shimniok	0:826c6171fc1b	1132	mem_cpy(sn, fn, 12);
shimniok	0:826c6171fc1b	1133
shimniok	0:826c6171fc1b	1134	if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
shimniok	0:826c6171fc1b	1135
shimniok	0:826c6171fc1b	1136	if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
shimniok	0:826c6171fc1b	1137	fn[NS] = 0; dj->lfn = 0; /* Find only SFN */
shimniok	0:826c6171fc1b	1138	for (n = 1; n < 100; n++) {
shimniok	0:826c6171fc1b	1139	gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
shimniok	0:826c6171fc1b	1140	res = dir_find(dj); /* Check if the name collides with existing SFN */
shimniok	0:826c6171fc1b	1141	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1142	}
shimniok	0:826c6171fc1b	1143	if (n == 100) return FR_DENIED; /* Abort if too many collisions */
shimniok	0:826c6171fc1b	1144	if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
shimniok	0:826c6171fc1b	1145	fn[NS] = sn[NS]; dj->lfn = lfn;
shimniok	0:826c6171fc1b	1146	}
shimniok	0:826c6171fc1b	1147
shimniok	0:826c6171fc1b	1148	if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve an SFN + LFN entries. */
shimniok	0:826c6171fc1b	1149	for (ne = 0; lfn[ne]; ne++) ;
shimniok	0:826c6171fc1b	1150	ne = (ne + 25) / 13;
shimniok	0:826c6171fc1b	1151	} else { /* Otherwise reserve only an SFN entry. */
shimniok	0:826c6171fc1b	1152	ne = 1;
shimniok	0:826c6171fc1b	1153	}
shimniok	0:826c6171fc1b	1154
shimniok	0:826c6171fc1b	1155	/* Reserve contiguous entries */
shimniok	0:826c6171fc1b	1156	res = dir_sdi(dj, 0);
shimniok	0:826c6171fc1b	1157	if (res != FR_OK) return res;
shimniok	0:826c6171fc1b	1158	n = is = 0;
shimniok	0:826c6171fc1b	1159	do {
shimniok	0:826c6171fc1b	1160	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1161	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1162	c = dj->dir; / Check the entry status */
shimniok	0:826c6171fc1b	1163	if (c == 0xE5 \|\| c == 0) { /* Is it a blank entry? */
shimniok	0:826c6171fc1b	1164	if (n == 0) is = dj->index; /* First index of the contiguous entry */
shimniok	0:826c6171fc1b	1165	if (++n == ne) break; /* A contiguous entry that required count is found */
shimniok	0:826c6171fc1b	1166	} else {
shimniok	0:826c6171fc1b	1167	n = 0; /* Not a blank entry. Restart to search */
shimniok	0:826c6171fc1b	1168	}
shimniok	0:826c6171fc1b	1169	res = dir_next(dj, 1); /* Next entry with table stretch */
shimniok	0:826c6171fc1b	1170	} while (res == FR_OK);
shimniok	0:826c6171fc1b	1171
shimniok	0:826c6171fc1b	1172	if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
shimniok	0:826c6171fc1b	1173	res = dir_sdi(dj, is);
shimniok	0:826c6171fc1b	1174	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1175	sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
shimniok	0:826c6171fc1b	1176	ne--;
shimniok	0:826c6171fc1b	1177	do { /* Store LFN entries in bottom first */
shimniok	0:826c6171fc1b	1178	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1179	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1180	fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
shimniok	0:826c6171fc1b	1181	dj->fs->wflag = 1;
shimniok	0:826c6171fc1b	1182	res = dir_next(dj, 0); /* Next entry */
shimniok	0:826c6171fc1b	1183	} while (res == FR_OK && --ne);
shimniok	0:826c6171fc1b	1184	}
shimniok	0:826c6171fc1b	1185	}
shimniok	0:826c6171fc1b	1186
shimniok	0:826c6171fc1b	1187	#else /* Non LFN configuration */
shimniok	0:826c6171fc1b	1188	res = dir_sdi(dj, 0);
shimniok	0:826c6171fc1b	1189	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1190	do { /* Find a blank entry for the SFN */
shimniok	0:826c6171fc1b	1191	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1192	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1193	c = *dj->dir;
shimniok	0:826c6171fc1b	1194	if (c == 0xE5 \|\| c == 0) break; /* Is it a blank entry? */
shimniok	0:826c6171fc1b	1195	res = dir_next(dj, 1); /* Next entry with table stretch */
shimniok	0:826c6171fc1b	1196	} while (res == FR_OK);
shimniok	0:826c6171fc1b	1197	}
shimniok	0:826c6171fc1b	1198	#endif
shimniok	0:826c6171fc1b	1199
shimniok	0:826c6171fc1b	1200	if (res == FR_OK) { /* Initialize the SFN entry */
shimniok	0:826c6171fc1b	1201	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1202	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1203	dir = dj->dir;
shimniok	0:826c6171fc1b	1204	mem_set(dir, 0, 32); /* Clean the entry */
shimniok	0:826c6171fc1b	1205	mem_cpy(dir, dj->fn, 11); /* Put SFN */
shimniok	0:826c6171fc1b	1206	#if _USE_LFN
shimniok	0:826c6171fc1b	1207	dir[DIR_NTres] = (dj->fn+NS) & (NS_BODY \| NS_EXT); / Put NT flag */
shimniok	0:826c6171fc1b	1208	#endif
shimniok	0:826c6171fc1b	1209	dj->fs->wflag = 1;
shimniok	0:826c6171fc1b	1210	}
shimniok	0:826c6171fc1b	1211	}
shimniok	0:826c6171fc1b	1212
shimniok	0:826c6171fc1b	1213	return res;
shimniok	0:826c6171fc1b	1214	}
shimniok	0:826c6171fc1b	1215	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	1216
shimniok	0:826c6171fc1b	1217
shimniok	0:826c6171fc1b	1218
shimniok	0:826c6171fc1b	1219
shimniok	0:826c6171fc1b	1220	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1221	/* Remove an object from the directory */
shimniok	0:826c6171fc1b	1222	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1223	#if !_FS_READONLY && !_FS_MINIMIZE
shimniok	0:826c6171fc1b	1224	static
shimniok	0:826c6171fc1b	1225	FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
shimniok	0:826c6171fc1b	1226	FAT_DIR dj / Directory object pointing the entry to be removed */
shimniok	0:826c6171fc1b	1227	)
shimniok	0:826c6171fc1b	1228	{
shimniok	0:826c6171fc1b	1229	FRESULT res;
shimniok	0:826c6171fc1b	1230	#if _USE_LFN /* LFN configuration */
shimniok	0:826c6171fc1b	1231	WORD i;
shimniok	0:826c6171fc1b	1232
shimniok	0:826c6171fc1b	1233	i = dj->index; /* SFN index */
shimniok	0:826c6171fc1b	1234	res = dir_sdi(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
shimniok	0:826c6171fc1b	1235	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1236	do {
shimniok	0:826c6171fc1b	1237	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1238	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1239	dj->dir = 0xE5; / Mark the entry "deleted" */
shimniok	0:826c6171fc1b	1240	dj->fs->wflag = 1;
shimniok	0:826c6171fc1b	1241	if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
shimniok	0:826c6171fc1b	1242	res = dir_next(dj, 0); /* Next entry */
shimniok	0:826c6171fc1b	1243	} while (res == FR_OK);
shimniok	0:826c6171fc1b	1244	if (res == FR_NO_FILE) res = FR_INT_ERR;
shimniok	0:826c6171fc1b	1245	}
shimniok	0:826c6171fc1b	1246
shimniok	0:826c6171fc1b	1247	#else /* Non LFN configuration */
shimniok	0:826c6171fc1b	1248	res = dir_sdi(dj, dj->index);
shimniok	0:826c6171fc1b	1249	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1250	res = move_window(dj->fs, dj->sect);
shimniok	0:826c6171fc1b	1251	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1252	dj->dir = 0xE5; / Mark the entry "deleted" */
shimniok	0:826c6171fc1b	1253	dj->fs->wflag = 1;
shimniok	0:826c6171fc1b	1254	}
shimniok	0:826c6171fc1b	1255	}
shimniok	0:826c6171fc1b	1256	#endif
shimniok	0:826c6171fc1b	1257
shimniok	0:826c6171fc1b	1258	return res;
shimniok	0:826c6171fc1b	1259	}
shimniok	0:826c6171fc1b	1260	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	1261
shimniok	0:826c6171fc1b	1262
shimniok	0:826c6171fc1b	1263
shimniok	0:826c6171fc1b	1264
shimniok	0:826c6171fc1b	1265	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1266	/* Pick a segment and create the object name in directory form */
shimniok	0:826c6171fc1b	1267	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1268
shimniok	0:826c6171fc1b	1269	static
shimniok	0:826c6171fc1b	1270	FRESULT create_name (
shimniok	0:826c6171fc1b	1271	FAT_DIR dj, / Pointer to the directory object */
shimniok	0:826c6171fc1b	1272	const TCHAR *path / Pointer to pointer to the segment in the path string */
shimniok	0:826c6171fc1b	1273	)
shimniok	0:826c6171fc1b	1274	{
shimniok	0:826c6171fc1b	1275	#ifdef _EXCVT
shimniok	0:826c6171fc1b	1276	static const BYTE excvt[] = _EXCVT; /* Upper conversion table for extended chars */
shimniok	0:826c6171fc1b	1277	#endif
shimniok	0:826c6171fc1b	1278
shimniok	0:826c6171fc1b	1279	#if _USE_LFN /* LFN configuration */
shimniok	0:826c6171fc1b	1280	BYTE b, cf;
shimniok	0:826c6171fc1b	1281	WCHAR w, *lfn;
shimniok	0:826c6171fc1b	1282	int i, ni, si, di;
shimniok	0:826c6171fc1b	1283	const TCHAR *p;
shimniok	0:826c6171fc1b	1284
shimniok	0:826c6171fc1b	1285	/* Create LFN in Unicode */
shimniok	0:826c6171fc1b	1286	si = di = 0;
shimniok	0:826c6171fc1b	1287	p = *path;
shimniok	0:826c6171fc1b	1288	lfn = dj->lfn;
shimniok	0:826c6171fc1b	1289	for (;;) {
shimniok	0:826c6171fc1b	1290	w = p[si++]; /* Get a character */
shimniok	0:826c6171fc1b	1291	if (w < ' ' \|\| w == '/' \|\| w == '\\') break; /* Break on end of segment */
shimniok	0:826c6171fc1b	1292	if (di >= _MAX_LFN) /* Reject too long name */
shimniok	0:826c6171fc1b	1293	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1294	#if !_LFN_UNICODE
shimniok	0:826c6171fc1b	1295	w &= 0xFF;
shimniok	0:826c6171fc1b	1296	if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
shimniok	0:826c6171fc1b	1297	b = p[si++]; /* Get 2nd byte */
shimniok	0:826c6171fc1b	1298	if (!IsDBCS2(b)) /* Reject invalid code for DBC */
shimniok	0:826c6171fc1b	1299	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1300	w = (w << 8) + b;
shimniok	0:826c6171fc1b	1301	}
shimniok	0:826c6171fc1b	1302	w = ff_convert(w, 1); /* Convert OEM to Unicode */
shimniok	0:826c6171fc1b	1303	if (!w) return FR_INVALID_NAME; /* Reject invalid code */
shimniok	0:826c6171fc1b	1304	#endif
shimniok	0:826c6171fc1b	1305	if (w < 0x80 && chk_chr("\":<>\?\|\x7F", w)) / Reject illegal chars for LFN */
shimniok	0:826c6171fc1b	1306	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1307	lfn[di++] = w; /* Store the Unicode char */
shimniok	0:826c6171fc1b	1308	}
shimniok	0:826c6171fc1b	1309	path = &p[si]; / Return pointer to the next segment */
shimniok	0:826c6171fc1b	1310	cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
shimniok	0:826c6171fc1b	1311	#if _FS_RPATH
shimniok	0:826c6171fc1b	1312	if ((di == 1 && lfn[di - 1] == '.') \|\| /* Is this a dot entry? */
shimniok	0:826c6171fc1b	1313	(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
shimniok	0:826c6171fc1b	1314	lfn[di] = 0;
shimniok	0:826c6171fc1b	1315	for (i = 0; i < 11; i++)
shimniok	0:826c6171fc1b	1316	dj->fn[i] = (i < di) ? '.' : ' ';
shimniok	0:826c6171fc1b	1317	dj->fn[i] = cf \| NS_DOT; /* This is a dot entry */
shimniok	0:826c6171fc1b	1318	return FR_OK;
shimniok	0:826c6171fc1b	1319	}
shimniok	0:826c6171fc1b	1320	#endif
shimniok	0:826c6171fc1b	1321	while (di) { /* Strip trailing spaces and dots */
shimniok	0:826c6171fc1b	1322	w = lfn[di - 1];
shimniok	0:826c6171fc1b	1323	if (w != ' ' && w != '.') break;
shimniok	0:826c6171fc1b	1324	di--;
shimniok	0:826c6171fc1b	1325	}
shimniok	0:826c6171fc1b	1326	if (!di) return FR_INVALID_NAME; /* Reject nul string */
shimniok	0:826c6171fc1b	1327
shimniok	0:826c6171fc1b	1328	lfn[di] = 0; /* LFN is created */
shimniok	0:826c6171fc1b	1329
shimniok	0:826c6171fc1b	1330	/* Create SFN in directory form */
shimniok	0:826c6171fc1b	1331	mem_set(dj->fn, ' ', 11);
shimniok	0:826c6171fc1b	1332	for (si = 0; lfn[si] == ' ' \|\| lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
shimniok	0:826c6171fc1b	1333	if (si) cf \|= NS_LOSS \| NS_LFN;
shimniok	0:826c6171fc1b	1334	while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
shimniok	0:826c6171fc1b	1335
shimniok	0:826c6171fc1b	1336	b = i = 0; ni = 8;
shimniok	0:826c6171fc1b	1337	for (;;) {
shimniok	0:826c6171fc1b	1338	w = lfn[si++]; /* Get an LFN char */
shimniok	0:826c6171fc1b	1339	if (!w) break; /* Break on end of the LFN */
shimniok	0:826c6171fc1b	1340	if (w == ' ' \|\| (w == '.' && si != di)) { /* Remove spaces and dots */
shimniok	0:826c6171fc1b	1341	cf \|= NS_LOSS \| NS_LFN; continue;
shimniok	0:826c6171fc1b	1342	}
shimniok	0:826c6171fc1b	1343
shimniok	0:826c6171fc1b	1344	if (i >= ni \|\| si == di) { /* Extension or end of SFN */
shimniok	0:826c6171fc1b	1345	if (ni == 11) { /* Long extension */
shimniok	0:826c6171fc1b	1346	cf \|= NS_LOSS \| NS_LFN; break;
shimniok	0:826c6171fc1b	1347	}
shimniok	0:826c6171fc1b	1348	if (si != di) cf \|= NS_LOSS \| NS_LFN; /* Out of 8.3 format */
shimniok	0:826c6171fc1b	1349	if (si > di) break; /* No extension */
shimniok	0:826c6171fc1b	1350	si = di; i = 8; ni = 11; /* Enter extension section */
shimniok	0:826c6171fc1b	1351	b <<= 2; continue;
shimniok	0:826c6171fc1b	1352	}
shimniok	0:826c6171fc1b	1353
shimniok	0:826c6171fc1b	1354	if (w >= 0x80) { /* Non ASCII char */
shimniok	0:826c6171fc1b	1355	#ifdef _EXCVT
shimniok	0:826c6171fc1b	1356	w = ff_convert(w, 0); /* Unicode -> OEM code */
shimniok	0:826c6171fc1b	1357	if (w) w = excvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
shimniok	0:826c6171fc1b	1358	#else
shimniok	0:826c6171fc1b	1359	w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
shimniok	0:826c6171fc1b	1360	#endif
shimniok	0:826c6171fc1b	1361	cf \|= NS_LFN; /* Force create LFN entry */
shimniok	0:826c6171fc1b	1362	}
shimniok	0:826c6171fc1b	1363
shimniok	0:826c6171fc1b	1364	if (_DF1S && w >= 0x100) { /* Double byte char */
shimniok	0:826c6171fc1b	1365	if (i >= ni - 1) {
shimniok	0:826c6171fc1b	1366	cf \|= NS_LOSS \| NS_LFN; i = ni; continue;
shimniok	0:826c6171fc1b	1367	}
shimniok	0:826c6171fc1b	1368	dj->fn[i++] = (BYTE)(w >> 8);
shimniok	0:826c6171fc1b	1369	} else { /* Single byte char */
shimniok	0:826c6171fc1b	1370	if (!w \|\| chk_chr("+,;=[]", w)) { /* Replace illegal chars for SFN */
shimniok	0:826c6171fc1b	1371	w = '_'; cf \|= NS_LOSS \| NS_LFN; /* Lossy conversion */
shimniok	0:826c6171fc1b	1372	} else {
shimniok	0:826c6171fc1b	1373	if (IsUpper(w)) { /* ASCII large capital */
shimniok	0:826c6171fc1b	1374	b \|= 2;
shimniok	0:826c6171fc1b	1375	} else {
shimniok	0:826c6171fc1b	1376	if (IsLower(w)) { /* ASCII small capital */
shimniok	0:826c6171fc1b	1377	b \|= 1; w -= 0x20;
shimniok	0:826c6171fc1b	1378	}
shimniok	0:826c6171fc1b	1379	}
shimniok	0:826c6171fc1b	1380	}
shimniok	0:826c6171fc1b	1381	}
shimniok	0:826c6171fc1b	1382	dj->fn[i++] = (BYTE)w;
shimniok	0:826c6171fc1b	1383	}
shimniok	0:826c6171fc1b	1384
shimniok	0:826c6171fc1b	1385	if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
shimniok	0:826c6171fc1b	1386
shimniok	0:826c6171fc1b	1387	if (ni == 8) b <<= 2;
shimniok	0:826c6171fc1b	1388	if ((b & 0x0C) == 0x0C \|\| (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
shimniok	0:826c6171fc1b	1389	cf \|= NS_LFN;
shimniok	0:826c6171fc1b	1390	if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
shimniok	0:826c6171fc1b	1391	if ((b & 0x03) == 0x01) cf \|= NS_EXT; /* NT flag (Extension has only small capital) */
shimniok	0:826c6171fc1b	1392	if ((b & 0x0C) == 0x04) cf \|= NS_BODY; /* NT flag (Filename has only small capital) */
shimniok	0:826c6171fc1b	1393	}
shimniok	0:826c6171fc1b	1394
shimniok	0:826c6171fc1b	1395	dj->fn[NS] = cf; /* SFN is created */
shimniok	0:826c6171fc1b	1396
shimniok	0:826c6171fc1b	1397	return FR_OK;
shimniok	0:826c6171fc1b	1398
shimniok	0:826c6171fc1b	1399
shimniok	0:826c6171fc1b	1400	#else /* Non-LFN configuration */
shimniok	0:826c6171fc1b	1401	BYTE b, c, d, *sfn;
shimniok	0:826c6171fc1b	1402	int ni, si, i;
shimniok	0:826c6171fc1b	1403	const char *p;
shimniok	0:826c6171fc1b	1404
shimniok	0:826c6171fc1b	1405	/* Create file name in directory form */
shimniok	0:826c6171fc1b	1406	sfn = dj->fn;
shimniok	0:826c6171fc1b	1407	mem_set(sfn, ' ', 11);
shimniok	0:826c6171fc1b	1408	si = i = b = 0; ni = 8;
shimniok	0:826c6171fc1b	1409	p = *path;
shimniok	0:826c6171fc1b	1410	#if _FS_RPATH
shimniok	0:826c6171fc1b	1411	if (p[si] == '.') { /* Is this a dot entry? */
shimniok	0:826c6171fc1b	1412	for (;;) {
shimniok	0:826c6171fc1b	1413	c = (BYTE)p[si++];
shimniok	0:826c6171fc1b	1414	if (c != '.' \|\| si >= 3) break;
shimniok	0:826c6171fc1b	1415	sfn[i++] = c;
shimniok	0:826c6171fc1b	1416	}
shimniok	0:826c6171fc1b	1417	if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1418	path = &p[si]; / Return pointer to the next segment */
shimniok	0:826c6171fc1b	1419	sfn[NS] = (c <= ' ') ? NS_LAST \| NS_DOT : NS_DOT; /* Set last segment flag if end of path */
shimniok	0:826c6171fc1b	1420	return FR_OK;
shimniok	0:826c6171fc1b	1421	}
shimniok	0:826c6171fc1b	1422	#endif
shimniok	0:826c6171fc1b	1423	for (;;) {
shimniok	0:826c6171fc1b	1424	c = (BYTE)p[si++];
shimniok	0:826c6171fc1b	1425	if (c <= ' ' \|\| c == '/' \|\| c == '\\') break; /* Break on end of segment */
shimniok	0:826c6171fc1b	1426	if (c == '.' \|\| i >= ni) {
shimniok	0:826c6171fc1b	1427	if (ni != 8 \|\| c != '.') return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1428	i = 8; ni = 11;
shimniok	0:826c6171fc1b	1429	b <<= 2; continue;
shimniok	0:826c6171fc1b	1430	}
shimniok	0:826c6171fc1b	1431	if (c >= 0x80) { /* Extended char */
shimniok	0:826c6171fc1b	1432	#ifdef _EXCVT
shimniok	0:826c6171fc1b	1433	c = excvt[c - 0x80]; /* Convert extend char (SBCS) */
shimniok	0:826c6171fc1b	1434	#else
shimniok	0:826c6171fc1b	1435	b \|= 3; /* Eliminate NT flag if extended char is exist */
shimniok	0:826c6171fc1b	1436	#if !_DF1S /* ASCII only cfg */
shimniok	0:826c6171fc1b	1437	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1438	#endif
shimniok	0:826c6171fc1b	1439	#endif
shimniok	0:826c6171fc1b	1440	}
shimniok	0:826c6171fc1b	1441	if (IsDBCS1(c)) { /* DBC 1st byte? */
shimniok	0:826c6171fc1b	1442	d = (BYTE)p[si++]; /* Get 2nd byte */
shimniok	0:826c6171fc1b	1443	if (!IsDBCS2(d) \|\| i >= ni - 1) /* Reject invalid DBC */
shimniok	0:826c6171fc1b	1444	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1445	sfn[i++] = c;
shimniok	0:826c6171fc1b	1446	sfn[i++] = d;
shimniok	0:826c6171fc1b	1447	} else { /* Single byte code */
shimniok	0:826c6171fc1b	1448	if (chk_chr("\"+,:<=>\?[]\|\x7F", c)) / Reject illegal chrs for SFN */
shimniok	0:826c6171fc1b	1449	return FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1450	if (IsUpper(c)) { /* ASCII large capital? */
shimniok	0:826c6171fc1b	1451	b \|= 2;
shimniok	0:826c6171fc1b	1452	} else {
shimniok	0:826c6171fc1b	1453	if (IsLower(c)) { /* ASCII small capital? */
shimniok	0:826c6171fc1b	1454	b \|= 1; c -= 0x20;
shimniok	0:826c6171fc1b	1455	}
shimniok	0:826c6171fc1b	1456	}
shimniok	0:826c6171fc1b	1457	sfn[i++] = c;
shimniok	0:826c6171fc1b	1458	}
shimniok	0:826c6171fc1b	1459	}
shimniok	0:826c6171fc1b	1460	path = &p[si]; / Return pointer to the next segment */
shimniok	0:826c6171fc1b	1461	c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
shimniok	0:826c6171fc1b	1462
shimniok	0:826c6171fc1b	1463	if (!i) return FR_INVALID_NAME; /* Reject nul string */
shimniok	0:826c6171fc1b	1464	if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
shimniok	0:826c6171fc1b	1465
shimniok	0:826c6171fc1b	1466	if (ni == 8) b <<= 2;
shimniok	0:826c6171fc1b	1467	if ((b & 0x03) == 0x01) c \|= NS_EXT; /* NT flag (Name extension has only small capital) */
shimniok	0:826c6171fc1b	1468	if ((b & 0x0C) == 0x04) c \|= NS_BODY; /* NT flag (Name body has only small capital) */
shimniok	0:826c6171fc1b	1469
shimniok	0:826c6171fc1b	1470	sfn[NS] = c; /* Store NT flag, File name is created */
shimniok	0:826c6171fc1b	1471
shimniok	0:826c6171fc1b	1472	return FR_OK;
shimniok	0:826c6171fc1b	1473	#endif
shimniok	0:826c6171fc1b	1474	}
shimniok	0:826c6171fc1b	1475
shimniok	0:826c6171fc1b	1476
shimniok	0:826c6171fc1b	1477
shimniok	0:826c6171fc1b	1478
shimniok	0:826c6171fc1b	1479	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1480	/* Get file information from directory entry */
shimniok	0:826c6171fc1b	1481	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1482	#if _FS_MINIMIZE <= 1
shimniok	0:826c6171fc1b	1483	static
shimniok	0:826c6171fc1b	1484	void get_fileinfo ( /* No return code */
shimniok	0:826c6171fc1b	1485	FAT_DIR dj, / Pointer to the directory object */
shimniok	0:826c6171fc1b	1486	FILINFO fno / Pointer to the file information to be filled */
shimniok	0:826c6171fc1b	1487	)
shimniok	0:826c6171fc1b	1488	{
shimniok	0:826c6171fc1b	1489	int i;
shimniok	0:826c6171fc1b	1490	BYTE nt, *dir;
shimniok	0:826c6171fc1b	1491	TCHAR *p, c;
shimniok	0:826c6171fc1b	1492
shimniok	0:826c6171fc1b	1493
shimniok	0:826c6171fc1b	1494	p = fno->fname;
shimniok	0:826c6171fc1b	1495	if (dj->sect) {
shimniok	0:826c6171fc1b	1496	dir = dj->dir;
shimniok	0:826c6171fc1b	1497	nt = dir[DIR_NTres]; /* NT flag */
shimniok	0:826c6171fc1b	1498	for (i = 0; i < 8; i++) { /* Copy name body */
shimniok	0:826c6171fc1b	1499	c = dir[i];
shimniok	0:826c6171fc1b	1500	if (c == ' ') break;
shimniok	0:826c6171fc1b	1501	if (c == 0x05) c = (TCHAR)0xE5;
shimniok	0:826c6171fc1b	1502	if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
shimniok	0:826c6171fc1b	1503	#if _LFN_UNICODE
shimniok	0:826c6171fc1b	1504	if (IsDBCS1(c) && i < 7 && IsDBCS2(dir[i + 1]))
shimniok	0:826c6171fc1b	1505	c = (c << 8) \| dir[++i];
shimniok	0:826c6171fc1b	1506	c = ff_convert(c, 1);
shimniok	0:826c6171fc1b	1507	if (!c) c = '?';
shimniok	0:826c6171fc1b	1508	#endif
shimniok	0:826c6171fc1b	1509	*p++ = c;
shimniok	0:826c6171fc1b	1510	}
shimniok	0:826c6171fc1b	1511	if (dir[8] != ' ') { /* Copy name extension */
shimniok	0:826c6171fc1b	1512	*p++ = '.';
shimniok	0:826c6171fc1b	1513	for (i = 8; i < 11; i++) {
shimniok	0:826c6171fc1b	1514	c = dir[i];
shimniok	0:826c6171fc1b	1515	if (c == ' ') break;
shimniok	0:826c6171fc1b	1516	if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
shimniok	0:826c6171fc1b	1517	#if _LFN_UNICODE
shimniok	0:826c6171fc1b	1518	if (IsDBCS1(c) && i < 10 && IsDBCS2(dir[i + 1]))
shimniok	0:826c6171fc1b	1519	c = (c << 8) \| dir[++i];
shimniok	0:826c6171fc1b	1520	c = ff_convert(c, 1);
shimniok	0:826c6171fc1b	1521	if (!c) c = '?';
shimniok	0:826c6171fc1b	1522	#endif
shimniok	0:826c6171fc1b	1523	*p++ = c;
shimniok	0:826c6171fc1b	1524	}
shimniok	0:826c6171fc1b	1525	}
shimniok	0:826c6171fc1b	1526	fno->fattrib = dir[DIR_Attr]; /* Attribute */
shimniok	0:826c6171fc1b	1527	fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
shimniok	0:826c6171fc1b	1528	fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
shimniok	0:826c6171fc1b	1529	fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
shimniok	0:826c6171fc1b	1530	}
shimniok	0:826c6171fc1b	1531	*p = 0;
shimniok	0:826c6171fc1b	1532
shimniok	0:826c6171fc1b	1533	#if _USE_LFN
shimniok	0:826c6171fc1b	1534	if (fno->lfname) {
shimniok	0:826c6171fc1b	1535	TCHAR *tp = fno->lfname;
shimniok	0:826c6171fc1b	1536	WCHAR w, *lfn;
shimniok	0:826c6171fc1b	1537
shimniok	0:826c6171fc1b	1538	i = 0;
shimniok	0:826c6171fc1b	1539	if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
shimniok	0:826c6171fc1b	1540	lfn = dj->lfn;
shimniok	0:826c6171fc1b	1541	while ((w = lfn++) != 0) { / Get an LFN char */
shimniok	0:826c6171fc1b	1542	#if !_LFN_UNICODE
shimniok	0:826c6171fc1b	1543	w = ff_convert(w, 0); /* Unicode -> OEM conversion */
shimniok	0:826c6171fc1b	1544	if (!w) { i = 0; break; } /* Could not convert, no LFN */
shimniok	0:826c6171fc1b	1545	if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
shimniok	0:826c6171fc1b	1546	tp[i++] = (TCHAR)(w >> 8);
shimniok	0:826c6171fc1b	1547	#endif
shimniok	0:826c6171fc1b	1548	if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
shimniok	0:826c6171fc1b	1549	tp[i++] = (TCHAR)w;
shimniok	0:826c6171fc1b	1550	}
shimniok	0:826c6171fc1b	1551	}
shimniok	0:826c6171fc1b	1552	tp[i] = 0; /* Terminator */
shimniok	0:826c6171fc1b	1553	}
shimniok	0:826c6171fc1b	1554	#endif
shimniok	0:826c6171fc1b	1555	}
shimniok	0:826c6171fc1b	1556	#endif /* _FS_MINIMIZE <= 1 */
shimniok	0:826c6171fc1b	1557
shimniok	0:826c6171fc1b	1558
shimniok	0:826c6171fc1b	1559
shimniok	0:826c6171fc1b	1560
shimniok	0:826c6171fc1b	1561	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1562	/* Follow a file path */
shimniok	0:826c6171fc1b	1563	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1564
shimniok	0:826c6171fc1b	1565	static
shimniok	0:826c6171fc1b	1566	FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
shimniok	0:826c6171fc1b	1567	FAT_DIR dj, / Directory object to return last directory and found object */
shimniok	0:826c6171fc1b	1568	const TCHAR path / Full-path string to find a file or directory */
shimniok	0:826c6171fc1b	1569	)
shimniok	0:826c6171fc1b	1570	{
shimniok	0:826c6171fc1b	1571	FRESULT res;
shimniok	0:826c6171fc1b	1572	BYTE *dir, ns;
shimniok	0:826c6171fc1b	1573
shimniok	0:826c6171fc1b	1574
shimniok	0:826c6171fc1b	1575	#if _FS_RPATH
shimniok	0:826c6171fc1b	1576	if (path == '/' \|\| path == '\\') { /* There is a heading separator */
shimniok	0:826c6171fc1b	1577	path++; dj->sclust = 0; /* Strip it and start from the root dir */
shimniok	0:826c6171fc1b	1578	} else { /* No heading separator */
shimniok	0:826c6171fc1b	1579	dj->sclust = dj->fs->cdir; /* Start from the current dir */
shimniok	0:826c6171fc1b	1580	}
shimniok	0:826c6171fc1b	1581	#else
shimniok	0:826c6171fc1b	1582	if (path == '/' \|\| path == '\\') /* Strip heading separator if exist */
shimniok	0:826c6171fc1b	1583	path++;
shimniok	0:826c6171fc1b	1584	dj->sclust = 0; /* Start from the root dir */
shimniok	0:826c6171fc1b	1585	#endif
shimniok	0:826c6171fc1b	1586
shimniok	0:826c6171fc1b	1587	if ((UINT)path < ' ') { / Nul path means the start directory itself */
shimniok	0:826c6171fc1b	1588	res = dir_sdi(dj, 0);
shimniok	0:826c6171fc1b	1589	dj->dir = 0;
shimniok	0:826c6171fc1b	1590
shimniok	0:826c6171fc1b	1591	} else { /* Follow path */
shimniok	0:826c6171fc1b	1592	for (;;) {
shimniok	0:826c6171fc1b	1593	res = create_name(dj, &path); /* Get a segment */
shimniok	0:826c6171fc1b	1594	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	1595	res = dir_find(dj); /* Find it */
shimniok	0:826c6171fc1b	1596	ns = *(dj->fn+NS);
shimniok	0:826c6171fc1b	1597	if (res != FR_OK) { /* Failed to find the object */
shimniok	0:826c6171fc1b	1598	if (res != FR_NO_FILE) break; /* Abort if any hard error occured */
shimniok	0:826c6171fc1b	1599	/* Object not found */
shimniok	0:826c6171fc1b	1600	if (_FS_RPATH && (ns & NS_DOT)) { /* If dot entry is not exit */
shimniok	0:826c6171fc1b	1601	dj->sclust = 0; dj->dir = 0; /* It is the root dir */
shimniok	0:826c6171fc1b	1602	res = FR_OK;
shimniok	0:826c6171fc1b	1603	if (!(ns & NS_LAST)) continue;
shimniok	0:826c6171fc1b	1604	} else { /* Could not find the object */
shimniok	0:826c6171fc1b	1605	if (!(ns & NS_LAST)) res = FR_NO_PATH;
shimniok	0:826c6171fc1b	1606	}
shimniok	0:826c6171fc1b	1607	break;
shimniok	0:826c6171fc1b	1608	}
shimniok	0:826c6171fc1b	1609	if (ns & NS_LAST) break; /* Last segment match. Function completed. */
shimniok	0:826c6171fc1b	1610	dir = dj->dir; /* There is next segment. Follow the sub directory */
shimniok	0:826c6171fc1b	1611	if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
shimniok	0:826c6171fc1b	1612	res = FR_NO_PATH; break;
shimniok	0:826c6171fc1b	1613	}
shimniok	0:826c6171fc1b	1614	dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
shimniok	0:826c6171fc1b	1615	}
shimniok	0:826c6171fc1b	1616	}
shimniok	0:826c6171fc1b	1617
shimniok	0:826c6171fc1b	1618	return res;
shimniok	0:826c6171fc1b	1619	}
shimniok	0:826c6171fc1b	1620
shimniok	0:826c6171fc1b	1621
shimniok	0:826c6171fc1b	1622
shimniok	0:826c6171fc1b	1623
shimniok	0:826c6171fc1b	1624	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1625	/* Load boot record and check if it is an FAT boot record */
shimniok	0:826c6171fc1b	1626	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1627
shimniok	0:826c6171fc1b	1628	static
shimniok	0:826c6171fc1b	1629	BYTE check_fs ( /* 0:The FAT BR, 1:Valid BR but not an FAT, 2:Not a BR, 3:Disk error */
shimniok	0:826c6171fc1b	1630	FATFS fs, / File system object */
shimniok	0:826c6171fc1b	1631	DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
shimniok	0:826c6171fc1b	1632	)
shimniok	0:826c6171fc1b	1633	{
shimniok	0:826c6171fc1b	1634	if (disk_read(fs->drv, fs->win, sect, 1) != RES_OK) /* Load boot record */
shimniok	0:826c6171fc1b	1635	return 3;
shimniok	0:826c6171fc1b	1636	if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
shimniok	0:826c6171fc1b	1637	return 2;
shimniok	0:826c6171fc1b	1638
shimniok	0:826c6171fc1b	1639	if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
shimniok	0:826c6171fc1b	1640	return 0;
shimniok	0:826c6171fc1b	1641	if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
shimniok	0:826c6171fc1b	1642	return 0;
shimniok	0:826c6171fc1b	1643
shimniok	0:826c6171fc1b	1644	return 1;
shimniok	0:826c6171fc1b	1645	}
shimniok	0:826c6171fc1b	1646
shimniok	0:826c6171fc1b	1647
shimniok	0:826c6171fc1b	1648
shimniok	0:826c6171fc1b	1649
shimniok	0:826c6171fc1b	1650	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1651	/* Make sure that the file system is valid */
shimniok	0:826c6171fc1b	1652	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1653
shimniok	0:826c6171fc1b	1654	static
shimniok	0:826c6171fc1b	1655	FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occurred */
shimniok	0:826c6171fc1b	1656	const TCHAR *path, / Pointer to pointer to the path name (drive number) */
shimniok	0:826c6171fc1b	1657	FATFS *rfs, / Pointer to pointer to the found file system object */
shimniok	0:826c6171fc1b	1658	BYTE chk_wp /* !=0: Check media write protection for write access */
shimniok	0:826c6171fc1b	1659	)
shimniok	0:826c6171fc1b	1660	{
shimniok	0:826c6171fc1b	1661	BYTE fmt, b, *tbl;
shimniok	0:826c6171fc1b	1662	UINT vol;
shimniok	0:826c6171fc1b	1663	DSTATUS stat;
shimniok	0:826c6171fc1b	1664	DWORD bsect, fasize, tsect, sysect, nclst, szbfat;
shimniok	0:826c6171fc1b	1665	WORD nrsv;
shimniok	0:826c6171fc1b	1666	const TCHAR p = path;
shimniok	0:826c6171fc1b	1667	FATFS *fs;
shimniok	0:826c6171fc1b	1668
shimniok	0:826c6171fc1b	1669	/* Get logical drive number from the path name */
shimniok	0:826c6171fc1b	1670	vol = p[0] - '0'; /* Is there a drive number? */
shimniok	0:826c6171fc1b	1671	if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
shimniok	0:826c6171fc1b	1672	p += 2; path = p; / Return pointer to the path name */
shimniok	0:826c6171fc1b	1673	} else { /* No drive number is given */
shimniok	0:826c6171fc1b	1674	#if _FS_RPATH
shimniok	0:826c6171fc1b	1675	vol = Drive; /* Use current drive */
shimniok	0:826c6171fc1b	1676	#else
shimniok	0:826c6171fc1b	1677	vol = 0; /* Use drive 0 */
shimniok	0:826c6171fc1b	1678	#endif
shimniok	0:826c6171fc1b	1679	}
shimniok	0:826c6171fc1b	1680
shimniok	0:826c6171fc1b	1681	/* Check if the logical drive is valid or not */
shimniok	0:826c6171fc1b	1682	if (vol >= _DRIVES) /* Is the drive number valid? */
shimniok	0:826c6171fc1b	1683	return FR_INVALID_DRIVE;
shimniok	0:826c6171fc1b	1684	rfs = fs = FatFs[vol]; / Return pointer to the corresponding file system object */
shimniok	0:826c6171fc1b	1685	if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
shimniok	0:826c6171fc1b	1686
shimniok	0:826c6171fc1b	1687	ENTER_FF(fs); /* Lock file system */
shimniok	0:826c6171fc1b	1688
shimniok	0:826c6171fc1b	1689	if (fs->fs_type) { /* If the logical drive has been mounted */
shimniok	0:826c6171fc1b	1690	stat = disk_status(fs->drv);
shimniok	0:826c6171fc1b	1691	if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
shimniok	0:826c6171fc1b	1692	#if !_FS_READONLY
shimniok	0:826c6171fc1b	1693	if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
shimniok	0:826c6171fc1b	1694	return FR_WRITE_PROTECTED;
shimniok	0:826c6171fc1b	1695	#endif
shimniok	0:826c6171fc1b	1696	return FR_OK; /* The file system object is valid */
shimniok	0:826c6171fc1b	1697	}
shimniok	0:826c6171fc1b	1698	}
shimniok	0:826c6171fc1b	1699
shimniok	0:826c6171fc1b	1700	/* The logical drive must be mounted. Following code attempts to mount the volume (initialize the file system object) */
shimniok	0:826c6171fc1b	1701
shimniok	0:826c6171fc1b	1702	fs->fs_type = 0; /* Clear the file system object */
shimniok	0:826c6171fc1b	1703	fs->drv = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
shimniok	0:826c6171fc1b	1704	stat = disk_initialize(fs->drv); /* Initialize low level disk I/O layer */
shimniok	0:826c6171fc1b	1705	if (stat & STA_NOINIT) /* Check if the drive is ready */
shimniok	0:826c6171fc1b	1706	return FR_NOT_READY;
shimniok	0:826c6171fc1b	1707	#if _MAX_SS != 512 /* Get disk sector size if needed */
shimniok	0:826c6171fc1b	1708	if (disk_ioctl(fs->drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK \|\| SS(fs) > _MAX_SS)
shimniok	0:826c6171fc1b	1709	return FR_NO_FILESYSTEM;
shimniok	0:826c6171fc1b	1710	#endif
shimniok	0:826c6171fc1b	1711	#if !_FS_READONLY
shimniok	0:826c6171fc1b	1712	if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
shimniok	0:826c6171fc1b	1713	return FR_WRITE_PROTECTED;
shimniok	0:826c6171fc1b	1714	#endif
shimniok	0:826c6171fc1b	1715	/* Search FAT partition on the drive (Supports only generic partitionings, FDISK and SFD) */
shimniok	0:826c6171fc1b	1716	fmt = check_fs(fs, bsect = 0); /* Check sector 0 if it is a VBR */
shimniok	0:826c6171fc1b	1717	if (fmt == 1) { /* Not an FAT-VBR, the disk may be partitioned */
shimniok	0:826c6171fc1b	1718	/* Check the partition listed in top of the partition table */
shimniok	0:826c6171fc1b	1719	tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */
shimniok	0:826c6171fc1b	1720	if (tbl[4]) { /* Is the partition existing? */
shimniok	0:826c6171fc1b	1721	bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
shimniok	0:826c6171fc1b	1722	fmt = check_fs(fs, bsect); /* Check the partition */
shimniok	0:826c6171fc1b	1723	}
shimniok	0:826c6171fc1b	1724	}
shimniok	0:826c6171fc1b	1725	if (fmt == 3) return FR_DISK_ERR;
shimniok	0:826c6171fc1b	1726	if (fmt) return FR_NO_FILESYSTEM; /* No FAT volume is found */
shimniok	0:826c6171fc1b	1727
shimniok	0:826c6171fc1b	1728	/* Following code initializes the file system object */
shimniok	0:826c6171fc1b	1729
shimniok	0:826c6171fc1b	1730	if (LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* (BPB_BytsPerSec must be equal to the physical sector size) */
shimniok	0:826c6171fc1b	1731	return FR_NO_FILESYSTEM;
shimniok	0:826c6171fc1b	1732
shimniok	0:826c6171fc1b	1733	fasize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
shimniok	0:826c6171fc1b	1734	if (!fasize) fasize = LD_DWORD(fs->win+BPB_FATSz32);
shimniok	0:826c6171fc1b	1735	fs->fsize = fasize;
shimniok	0:826c6171fc1b	1736
shimniok	0:826c6171fc1b	1737	fs->n_fats = b = fs->win[BPB_NumFATs]; /* Number of FAT copies */
shimniok	0:826c6171fc1b	1738	if (b != 1 && b != 2) return FR_NO_FILESYSTEM; /* (Must be 1 or 2) */
shimniok	0:826c6171fc1b	1739	fasize = b; / Number of sectors for FAT area */
shimniok	0:826c6171fc1b	1740
shimniok	0:826c6171fc1b	1741	fs->csize = b = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
shimniok	0:826c6171fc1b	1742	if (!b \|\| (b & (b - 1))) return FR_NO_FILESYSTEM; /* (Must be 1,2,4...128) */
shimniok	0:826c6171fc1b	1743
shimniok	0:826c6171fc1b	1744	fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Number of root directory entries */
shimniok	0:826c6171fc1b	1745	if (fs->n_rootdir % (SS(fs) / 32)) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be sector aligned) */
shimniok	0:826c6171fc1b	1746
shimniok	0:826c6171fc1b	1747	tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
shimniok	0:826c6171fc1b	1748	if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
shimniok	0:826c6171fc1b	1749
shimniok	0:826c6171fc1b	1750	nrsv = LD_WORD(fs->win+BPB_RsvdSecCnt); /* Number of reserved sectors */
shimniok	0:826c6171fc1b	1751	if (!nrsv) return FR_NO_FILESYSTEM; /* (BPB_RsvdSecCnt must not be 0) */
shimniok	0:826c6171fc1b	1752
shimniok	0:826c6171fc1b	1753	/* Determine the FAT sub type */
shimniok	0:826c6171fc1b	1754	sysect = nrsv + fasize + fs->n_rootdir / (SS(fs) / 32); /* RSV+FAT+DIR */
shimniok	0:826c6171fc1b	1755	if (tsect < sysect) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
shimniok	0:826c6171fc1b	1756	nclst = (tsect - sysect) / fs->csize; /* Number of clusters */
shimniok	0:826c6171fc1b	1757	if (!nclst) return FR_NO_FILESYSTEM; /* (Invalid volume size) */
shimniok	0:826c6171fc1b	1758	fmt = FS_FAT12;
shimniok	0:826c6171fc1b	1759	if (nclst >= MIN_FAT16) fmt = FS_FAT16;
shimniok	0:826c6171fc1b	1760	if (nclst >= MIN_FAT32) fmt = FS_FAT32;
shimniok	0:826c6171fc1b	1761
shimniok	0:826c6171fc1b	1762	/* Boundaries and Limits */
shimniok	0:826c6171fc1b	1763	fs->n_fatent = nclst + 2; /* Number of FAT entries */
shimniok	0:826c6171fc1b	1764	fs->database = bsect + sysect; /* Data start sector */
shimniok	0:826c6171fc1b	1765	fs->fatbase = bsect + nrsv; /* FAT start sector */
shimniok	0:826c6171fc1b	1766	if (fmt == FS_FAT32) {
shimniok	0:826c6171fc1b	1767	if (fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must be 0) */
shimniok	0:826c6171fc1b	1768	fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
shimniok	0:826c6171fc1b	1769	szbfat = fs->n_fatent * 4; /* (Required FAT size) */
shimniok	0:826c6171fc1b	1770	} else {
shimniok	0:826c6171fc1b	1771	if (!fs->n_rootdir) return FR_NO_FILESYSTEM; /* (BPB_RootEntCnt must not be 0) */
shimniok	0:826c6171fc1b	1772	fs->dirbase = fs->fatbase + fasize; /* Root directory start sector */
shimniok	0:826c6171fc1b	1773	szbfat = (fmt == FS_FAT16) ? /* (Required FAT size) */
shimniok	0:826c6171fc1b	1774	fs->n_fatent * 2 : fs->n_fatent * 3 / 2 + (fs->n_fatent & 1);
shimniok	0:826c6171fc1b	1775	}
shimniok	0:826c6171fc1b	1776	if (fs->fsize < (szbfat + (SS(fs) - 1)) / SS(fs)) /* (FAT size must not be less than FAT sectors */
shimniok	0:826c6171fc1b	1777	return FR_NO_FILESYSTEM;
shimniok	0:826c6171fc1b	1778
shimniok	0:826c6171fc1b	1779	#if !_FS_READONLY
shimniok	0:826c6171fc1b	1780	/* Initialize cluster allocation information */
shimniok	0:826c6171fc1b	1781	fs->free_clust = 0xFFFFFFFF;
shimniok	0:826c6171fc1b	1782	fs->last_clust = 0;
shimniok	0:826c6171fc1b	1783
shimniok	0:826c6171fc1b	1784	/* Get fsinfo if available */
shimniok	0:826c6171fc1b	1785	if (fmt == FS_FAT32) {
shimniok	0:826c6171fc1b	1786	fs->fsi_flag = 0;
shimniok	0:826c6171fc1b	1787	fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
shimniok	0:826c6171fc1b	1788	if (disk_read(fs->drv, fs->win, fs->fsi_sector, 1) == RES_OK &&
shimniok	0:826c6171fc1b	1789	LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
shimniok	0:826c6171fc1b	1790	LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
shimniok	0:826c6171fc1b	1791	LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
shimniok	0:826c6171fc1b	1792	fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
shimniok	0:826c6171fc1b	1793	fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
shimniok	0:826c6171fc1b	1794	}
shimniok	0:826c6171fc1b	1795	}
shimniok	0:826c6171fc1b	1796	#endif
shimniok	0:826c6171fc1b	1797	fs->fs_type = fmt; /* FAT sub-type */
shimniok	0:826c6171fc1b	1798	fs->id = ++Fsid; /* File system mount ID */
shimniok	0:826c6171fc1b	1799	fs->winsect = 0; /* Invalidate sector cache */
shimniok	0:826c6171fc1b	1800	fs->wflag = 0;
shimniok	0:826c6171fc1b	1801	#if _FS_RPATH
shimniok	0:826c6171fc1b	1802	fs->cdir = 0; /* Current directory (root dir) */
shimniok	0:826c6171fc1b	1803	#endif
shimniok	0:826c6171fc1b	1804	#if _FS_SHARE /* Clear file lock semaphores */
shimniok	0:826c6171fc1b	1805	for (vol = 0; vol < _FS_SHARE; vol++)
shimniok	0:826c6171fc1b	1806	fs->flsem[vol].ctr = 0;
shimniok	0:826c6171fc1b	1807	#endif
shimniok	0:826c6171fc1b	1808
shimniok	0:826c6171fc1b	1809	return FR_OK;
shimniok	0:826c6171fc1b	1810	}
shimniok	0:826c6171fc1b	1811
shimniok	0:826c6171fc1b	1812
shimniok	0:826c6171fc1b	1813
shimniok	0:826c6171fc1b	1814
shimniok	0:826c6171fc1b	1815	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1816	/* Check if the file/dir object is valid or not */
shimniok	0:826c6171fc1b	1817	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1818
shimniok	0:826c6171fc1b	1819	static
shimniok	0:826c6171fc1b	1820	FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
shimniok	0:826c6171fc1b	1821	FATFS fs, / Pointer to the file system object */
shimniok	0:826c6171fc1b	1822	WORD id /* Member id of the target object to be checked */
shimniok	0:826c6171fc1b	1823	)
shimniok	0:826c6171fc1b	1824	{
shimniok	0:826c6171fc1b	1825	if (!fs \|\| !fs->fs_type \|\| fs->id != id)
shimniok	0:826c6171fc1b	1826	return FR_INVALID_OBJECT;
shimniok	0:826c6171fc1b	1827
shimniok	0:826c6171fc1b	1828	ENTER_FF(fs); /* Lock file system */
shimniok	0:826c6171fc1b	1829
shimniok	0:826c6171fc1b	1830	if (disk_status(fs->drv) & STA_NOINIT)
shimniok	0:826c6171fc1b	1831	return FR_NOT_READY;
shimniok	0:826c6171fc1b	1832
shimniok	0:826c6171fc1b	1833	return FR_OK;
shimniok	0:826c6171fc1b	1834	}
shimniok	0:826c6171fc1b	1835
shimniok	0:826c6171fc1b	1836
shimniok	0:826c6171fc1b	1837
shimniok	0:826c6171fc1b	1838
shimniok	0:826c6171fc1b	1839	/*--------------------------------------------------------------------------
shimniok	0:826c6171fc1b	1840
shimniok	0:826c6171fc1b	1841	Public Functions
shimniok	0:826c6171fc1b	1842
shimniok	0:826c6171fc1b	1843	--------------------------------------------------------------------------*/
shimniok	0:826c6171fc1b	1844
shimniok	0:826c6171fc1b	1845
shimniok	0:826c6171fc1b	1846
shimniok	0:826c6171fc1b	1847	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1848	/* Mount/Unmount a Logical Drive */
shimniok	0:826c6171fc1b	1849	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1850
shimniok	0:826c6171fc1b	1851	FRESULT f_mount (
shimniok	0:826c6171fc1b	1852	BYTE vol, /* Logical drive number to be mounted/unmounted */
shimniok	0:826c6171fc1b	1853	FATFS fs / Pointer to new file system object (NULL for unmount)*/
shimniok	0:826c6171fc1b	1854	)
shimniok	0:826c6171fc1b	1855	{
shimniok	0:826c6171fc1b	1856	FATFS *rfs;
shimniok	0:826c6171fc1b	1857
shimniok	0:826c6171fc1b	1858
shimniok	0:826c6171fc1b	1859	if (vol >= _DRIVES) /* Check if the drive number is valid */
shimniok	0:826c6171fc1b	1860	return FR_INVALID_DRIVE;
shimniok	0:826c6171fc1b	1861	rfs = FatFs[vol]; /* Get current fs object */
shimniok	0:826c6171fc1b	1862
shimniok	0:826c6171fc1b	1863	if (rfs) {
shimniok	0:826c6171fc1b	1864	#if _FS_REENTRANT /* Discard sync object of the current volume */
shimniok	0:826c6171fc1b	1865	if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
shimniok	0:826c6171fc1b	1866	#endif
shimniok	0:826c6171fc1b	1867	rfs->fs_type = 0; /* Clear old fs object */
shimniok	0:826c6171fc1b	1868	}
shimniok	0:826c6171fc1b	1869
shimniok	0:826c6171fc1b	1870	if (fs) {
shimniok	0:826c6171fc1b	1871	fs->fs_type = 0; /* Clear new fs object */
shimniok	0:826c6171fc1b	1872	#if _FS_REENTRANT /* Create sync object for the new volume */
shimniok	0:826c6171fc1b	1873	if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
shimniok	0:826c6171fc1b	1874	#endif
shimniok	0:826c6171fc1b	1875	}
shimniok	0:826c6171fc1b	1876	FatFs[vol] = fs; /* Register new fs object */
shimniok	0:826c6171fc1b	1877
shimniok	0:826c6171fc1b	1878	return FR_OK;
shimniok	0:826c6171fc1b	1879	}
shimniok	0:826c6171fc1b	1880
shimniok	0:826c6171fc1b	1881
shimniok	0:826c6171fc1b	1882
shimniok	0:826c6171fc1b	1883
shimniok	0:826c6171fc1b	1884	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1885	/* Open or Create a File */
shimniok	0:826c6171fc1b	1886	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	1887
shimniok	0:826c6171fc1b	1888	FRESULT f_open (
shimniok	0:826c6171fc1b	1889	FAT_FIL fp, / Pointer to the blank file object */
shimniok	0:826c6171fc1b	1890	const TCHAR path, / Pointer to the file name */
shimniok	0:826c6171fc1b	1891	BYTE mode /* Access mode and file open mode flags */
shimniok	0:826c6171fc1b	1892	)
shimniok	0:826c6171fc1b	1893	{
shimniok	0:826c6171fc1b	1894	FRESULT res;
shimniok	0:826c6171fc1b	1895	FAT_DIR dj;
shimniok	0:826c6171fc1b	1896	BYTE *dir;
shimniok	0:826c6171fc1b	1897	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	1898
shimniok	0:826c6171fc1b	1899
shimniok	0:826c6171fc1b	1900	fp->fs = 0; /* Clear file object */
shimniok	0:826c6171fc1b	1901
shimniok	0:826c6171fc1b	1902	#if !_FS_READONLY
shimniok	0:826c6171fc1b	1903	mode &= FA_READ \| FA_WRITE \| FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW;
shimniok	0:826c6171fc1b	1904	res = chk_mounted(&path, &dj.fs, (BYTE)(mode & ~FA_READ));
shimniok	0:826c6171fc1b	1905	#else
shimniok	0:826c6171fc1b	1906	mode &= FA_READ;
shimniok	0:826c6171fc1b	1907	res = chk_mounted(&path, &dj.fs, 0);
shimniok	0:826c6171fc1b	1908	#endif
shimniok	0:826c6171fc1b	1909	INIT_BUF(dj);
shimniok	0:826c6171fc1b	1910	if (res == FR_OK)
shimniok	0:826c6171fc1b	1911	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	1912	dir = dj.dir;
shimniok	0:826c6171fc1b	1913
shimniok	0:826c6171fc1b	1914	#if !_FS_READONLY /* R/W configuration */
shimniok	0:826c6171fc1b	1915	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1916	if (!dir) /* Current dir itself */
shimniok	0:826c6171fc1b	1917	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1918	#if _FS_SHARE
shimniok	0:826c6171fc1b	1919	else
shimniok	0:826c6171fc1b	1920	res = chk_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
shimniok	0:826c6171fc1b	1921	#endif
shimniok	0:826c6171fc1b	1922	}
shimniok	0:826c6171fc1b	1923	/* Create or Open a file */
shimniok	0:826c6171fc1b	1924	if (mode & (FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW)) {
shimniok	0:826c6171fc1b	1925	DWORD dw, cl;
shimniok	0:826c6171fc1b	1926
shimniok	0:826c6171fc1b	1927	if (res != FR_OK) { /* No file, create new */
shimniok	0:826c6171fc1b	1928	if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
shimniok	0:826c6171fc1b	1929	#if _FS_SHARE
shimniok	0:826c6171fc1b	1930	res = enq_lock(dj.fs) ? dir_register(&dj) : FR_TOO_MANY_OPEN_FILES;
shimniok	0:826c6171fc1b	1931	#else
shimniok	0:826c6171fc1b	1932	res = dir_register(&dj);
shimniok	0:826c6171fc1b	1933	#endif
shimniok	0:826c6171fc1b	1934	mode \|= FA_CREATE_ALWAYS;
shimniok	0:826c6171fc1b	1935	dir = dj.dir; /* New entry */
shimniok	0:826c6171fc1b	1936	}
shimniok	0:826c6171fc1b	1937	else { /* Any object is already existing */
shimniok	0:826c6171fc1b	1938	if (mode & FA_CREATE_NEW) { /* Cannot create new */
shimniok	0:826c6171fc1b	1939	res = FR_EXIST;
shimniok	0:826c6171fc1b	1940	} else {
shimniok	0:826c6171fc1b	1941	if (dir[DIR_Attr] & (AM_RDO \| AM_DIR)) /* Cannot overwrite it (R/O or DIR) */
shimniok	0:826c6171fc1b	1942	res = FR_DENIED;
shimniok	0:826c6171fc1b	1943	}
shimniok	0:826c6171fc1b	1944	}
shimniok	0:826c6171fc1b	1945	if (res == FR_OK && (mode & FA_CREATE_ALWAYS)) { /* Truncate it if overwrite mode */
shimniok	0:826c6171fc1b	1946	dw = get_fattime(); /* Created time */
shimniok	0:826c6171fc1b	1947	ST_DWORD(dir+DIR_CrtTime, dw);
shimniok	0:826c6171fc1b	1948	dir[DIR_Attr] = 0; /* Reset attribute */
shimniok	0:826c6171fc1b	1949	ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
shimniok	0:826c6171fc1b	1950	cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */
shimniok	0:826c6171fc1b	1951	ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */
shimniok	0:826c6171fc1b	1952	ST_WORD(dir+DIR_FstClusLO, 0);
shimniok	0:826c6171fc1b	1953	dj.fs->wflag = 1;
shimniok	0:826c6171fc1b	1954	if (cl) { /* Remove the cluster chain if exist */
shimniok	0:826c6171fc1b	1955	dw = dj.fs->winsect;
shimniok	0:826c6171fc1b	1956	res = remove_chain(dj.fs, cl);
shimniok	0:826c6171fc1b	1957	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1958	dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
shimniok	0:826c6171fc1b	1959	res = move_window(dj.fs, dw);
shimniok	0:826c6171fc1b	1960	}
shimniok	0:826c6171fc1b	1961	}
shimniok	0:826c6171fc1b	1962	}
shimniok	0:826c6171fc1b	1963	}
shimniok	0:826c6171fc1b	1964	else { /* Open an existing file */
shimniok	0:826c6171fc1b	1965	if (res == FR_OK) { /* Follow succeeded */
shimniok	0:826c6171fc1b	1966	if (dir[DIR_Attr] & AM_DIR) { /* It is a directory */
shimniok	0:826c6171fc1b	1967	res = FR_NO_FILE;
shimniok	0:826c6171fc1b	1968	} else {
shimniok	0:826c6171fc1b	1969	if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
shimniok	0:826c6171fc1b	1970	res = FR_DENIED;
shimniok	0:826c6171fc1b	1971	}
shimniok	0:826c6171fc1b	1972	}
shimniok	0:826c6171fc1b	1973	}
shimniok	0:826c6171fc1b	1974	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1975	if (mode & (FA_WRITE \| FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW))
shimniok	0:826c6171fc1b	1976	mode \|= FA__WRITTEN; /* Set file changed flag */
shimniok	0:826c6171fc1b	1977	fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
shimniok	0:826c6171fc1b	1978	fp->dir_ptr = dir;
shimniok	0:826c6171fc1b	1979	#if _FS_SHARE
shimniok	0:826c6171fc1b	1980	fp->lockid = inc_lock(&dj, (mode & ~FA_READ) ? 1 : 0);
shimniok	0:826c6171fc1b	1981	if (!fp->lockid) res = FR_INT_ERR;
shimniok	0:826c6171fc1b	1982	#endif
shimniok	0:826c6171fc1b	1983	}
shimniok	0:826c6171fc1b	1984
shimniok	0:826c6171fc1b	1985	#else /* R/O configuration */
shimniok	0:826c6171fc1b	1986	if (res == FR_OK) { /* Follow succeeded */
shimniok	0:826c6171fc1b	1987	if (!dir) { /* Current dir itself */
shimniok	0:826c6171fc1b	1988	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	1989	} else {
shimniok	0:826c6171fc1b	1990	if (dir[DIR_Attr] & AM_DIR) /* It is a directory */
shimniok	0:826c6171fc1b	1991	res = FR_NO_FILE;
shimniok	0:826c6171fc1b	1992	}
shimniok	0:826c6171fc1b	1993	}
shimniok	0:826c6171fc1b	1994	#endif
shimniok	0:826c6171fc1b	1995	FREE_BUF();
shimniok	0:826c6171fc1b	1996
shimniok	0:826c6171fc1b	1997	if (res == FR_OK) {
shimniok	0:826c6171fc1b	1998	fp->flag = mode; /* File access mode */
shimniok	0:826c6171fc1b	1999	fp->org_clust = /* File start cluster */
shimniok	0:826c6171fc1b	2000	((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
shimniok	0:826c6171fc1b	2001	fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
shimniok	0:826c6171fc1b	2002	fp->fptr = 0; /* File pointer */
shimniok	0:826c6171fc1b	2003	fp->dsect = 0;
shimniok	0:826c6171fc1b	2004	#if _USE_FASTSEEK
shimniok	0:826c6171fc1b	2005	fp->cltbl = 0; /* No cluster link map table */
shimniok	0:826c6171fc1b	2006	#endif
shimniok	0:826c6171fc1b	2007	fp->fs = dj.fs; fp->id = dj.fs->id; /* Validate file object */
shimniok	0:826c6171fc1b	2008	}
shimniok	0:826c6171fc1b	2009
shimniok	0:826c6171fc1b	2010	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2011	}
shimniok	0:826c6171fc1b	2012
shimniok	0:826c6171fc1b	2013
shimniok	0:826c6171fc1b	2014
shimniok	0:826c6171fc1b	2015
shimniok	0:826c6171fc1b	2016	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2017	/* Read File */
shimniok	0:826c6171fc1b	2018	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2019
shimniok	0:826c6171fc1b	2020	FRESULT f_read (
shimniok	0:826c6171fc1b	2021	FAT_FIL fp, / Pointer to the file object */
shimniok	0:826c6171fc1b	2022	void buff, / Pointer to data buffer */
shimniok	0:826c6171fc1b	2023	UINT btr, /* Number of bytes to read */
shimniok	0:826c6171fc1b	2024	UINT br / Pointer to number of bytes read */
shimniok	0:826c6171fc1b	2025	)
shimniok	0:826c6171fc1b	2026	{
shimniok	0:826c6171fc1b	2027	FRESULT res;
shimniok	0:826c6171fc1b	2028	DWORD clst, sect, remain;
shimniok	0:826c6171fc1b	2029	UINT rcnt, cc;
shimniok	0:826c6171fc1b	2030	BYTE csect, rbuff = (BYTE)buff;
shimniok	0:826c6171fc1b	2031
shimniok	0:826c6171fc1b	2032
shimniok	0:826c6171fc1b	2033	br = 0; / Initialize byte counter */
shimniok	0:826c6171fc1b	2034
shimniok	0:826c6171fc1b	2035	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2036	if (res != FR_OK) LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2037	if (fp->flag & FA__ERROR) /* Check abort flag */
shimniok	0:826c6171fc1b	2038	LEAVE_FF(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2039	if (!(fp->flag & FA_READ)) /* Check access mode */
shimniok	0:826c6171fc1b	2040	LEAVE_FF(fp->fs, FR_DENIED);
shimniok	0:826c6171fc1b	2041	remain = fp->fsize - fp->fptr;
shimniok	0:826c6171fc1b	2042	if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
shimniok	0:826c6171fc1b	2043
shimniok	0:826c6171fc1b	2044	for ( ; btr; /* Repeat until all data transferred */
shimniok	0:826c6171fc1b	2045	rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
shimniok	0:826c6171fc1b	2046	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
shimniok	0:826c6171fc1b	2047	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
shimniok	0:826c6171fc1b	2048	if (!csect) { /* On the cluster boundary? */
shimniok	0:826c6171fc1b	2049	clst = (fp->fptr == 0) ? /* On the top of the file? */
shimniok	0:826c6171fc1b	2050	fp->org_clust : get_fat(fp->fs, fp->curr_clust);
shimniok	0:826c6171fc1b	2051	if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2052	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2053	fp->curr_clust = clst; /* Update current cluster */
shimniok	0:826c6171fc1b	2054	}
shimniok	0:826c6171fc1b	2055	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
shimniok	0:826c6171fc1b	2056	if (!sect) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2057	sect += csect;
shimniok	0:826c6171fc1b	2058	cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
shimniok	0:826c6171fc1b	2059	if (cc) { /* Read maximum contiguous sectors directly */
shimniok	0:826c6171fc1b	2060	if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
shimniok	0:826c6171fc1b	2061	cc = fp->fs->csize - csect;
shimniok	0:826c6171fc1b	2062	if (disk_read(fp->fs->drv, rbuff, sect, (BYTE)cc) != RES_OK)
shimniok	0:826c6171fc1b	2063	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2064	#if !_FS_READONLY && _FS_MINIMIZE <= 2 /* Replace one of the read sectors with cached data if it contains a dirty sector */
shimniok	0:826c6171fc1b	2065	#if _FS_TINY
shimniok	0:826c6171fc1b	2066	if (fp->fs->wflag && fp->fs->winsect - sect < cc)
shimniok	0:826c6171fc1b	2067	mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
shimniok	0:826c6171fc1b	2068	#else
shimniok	0:826c6171fc1b	2069	if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc)
shimniok	0:826c6171fc1b	2070	mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
shimniok	0:826c6171fc1b	2071	#endif
shimniok	0:826c6171fc1b	2072	#endif
shimniok	0:826c6171fc1b	2073	rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
shimniok	0:826c6171fc1b	2074	continue;
shimniok	0:826c6171fc1b	2075	}
shimniok	0:826c6171fc1b	2076	#if !_FS_TINY
shimniok	0:826c6171fc1b	2077	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2078	if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
shimniok	0:826c6171fc1b	2079	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2080	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2081	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2082	}
shimniok	0:826c6171fc1b	2083	#endif
shimniok	0:826c6171fc1b	2084	if (fp->dsect != sect) { /* Fill sector buffer with file data */
shimniok	0:826c6171fc1b	2085	if (disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2086	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2087	}
shimniok	0:826c6171fc1b	2088	#endif
shimniok	0:826c6171fc1b	2089	fp->dsect = sect;
shimniok	0:826c6171fc1b	2090	}
shimniok	0:826c6171fc1b	2091	rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
shimniok	0:826c6171fc1b	2092	if (rcnt > btr) rcnt = btr;
shimniok	0:826c6171fc1b	2093	#if _FS_TINY
shimniok	0:826c6171fc1b	2094	if (move_window(fp->fs, fp->dsect)) /* Move sector window */
shimniok	0:826c6171fc1b	2095	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2096	mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
shimniok	0:826c6171fc1b	2097	#else
shimniok	0:826c6171fc1b	2098	mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
shimniok	0:826c6171fc1b	2099	#endif
shimniok	0:826c6171fc1b	2100	}
shimniok	0:826c6171fc1b	2101
shimniok	0:826c6171fc1b	2102	LEAVE_FF(fp->fs, FR_OK);
shimniok	0:826c6171fc1b	2103	}
shimniok	0:826c6171fc1b	2104
shimniok	0:826c6171fc1b	2105
shimniok	0:826c6171fc1b	2106
shimniok	0:826c6171fc1b	2107
shimniok	0:826c6171fc1b	2108	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2109	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2110	/* Write File */
shimniok	0:826c6171fc1b	2111	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2112
shimniok	0:826c6171fc1b	2113	FRESULT f_write (
shimniok	0:826c6171fc1b	2114	FAT_FIL fp, / Pointer to the file object */
shimniok	0:826c6171fc1b	2115	const void buff, / Pointer to the data to be written */
shimniok	0:826c6171fc1b	2116	UINT btw, /* Number of bytes to write */
shimniok	0:826c6171fc1b	2117	UINT bw / Pointer to number of bytes written */
shimniok	0:826c6171fc1b	2118	)
shimniok	0:826c6171fc1b	2119	{
shimniok	0:826c6171fc1b	2120	FRESULT res;
shimniok	0:826c6171fc1b	2121	DWORD clst, sect;
shimniok	0:826c6171fc1b	2122	UINT wcnt, cc;
shimniok	0:826c6171fc1b	2123	const BYTE wbuff = (const BYTE)buff;
shimniok	0:826c6171fc1b	2124	BYTE csect;
shimniok	0:826c6171fc1b	2125
shimniok	0:826c6171fc1b	2126
shimniok	0:826c6171fc1b	2127	bw = 0; / Initialize byte counter */
shimniok	0:826c6171fc1b	2128
shimniok	0:826c6171fc1b	2129	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2130	if (res != FR_OK) LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2131	if (fp->flag & FA__ERROR) /* Check abort flag */
shimniok	0:826c6171fc1b	2132	LEAVE_FF(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2133	if (!(fp->flag & FA_WRITE)) /* Check access mode */
shimniok	0:826c6171fc1b	2134	LEAVE_FF(fp->fs, FR_DENIED);
shimniok	0:826c6171fc1b	2135	if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */
shimniok	0:826c6171fc1b	2136
shimniok	0:826c6171fc1b	2137	for ( ; btw; /* Repeat until all data transferred */
shimniok	0:826c6171fc1b	2138	wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
shimniok	0:826c6171fc1b	2139	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
shimniok	0:826c6171fc1b	2140	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
shimniok	0:826c6171fc1b	2141	if (!csect) { /* On the cluster boundary? */
shimniok	0:826c6171fc1b	2142	if (fp->fptr == 0) { /* On the top of the file? */
shimniok	0:826c6171fc1b	2143	clst = fp->org_clust; /* Follow from the origin */
shimniok	0:826c6171fc1b	2144	if (clst == 0) /* When there is no cluster chain, */
shimniok	0:826c6171fc1b	2145	fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
shimniok	0:826c6171fc1b	2146	} else { /* Middle or end of the file */
shimniok	0:826c6171fc1b	2147	clst = create_chain(fp->fs, fp->curr_clust); /* Follow or stretch cluster chain */
shimniok	0:826c6171fc1b	2148	}
shimniok	0:826c6171fc1b	2149	if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
shimniok	0:826c6171fc1b	2150	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2151	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2152	fp->curr_clust = clst; /* Update current cluster */
shimniok	0:826c6171fc1b	2153	}
shimniok	0:826c6171fc1b	2154	#if _FS_TINY
shimniok	0:826c6171fc1b	2155	if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
shimniok	0:826c6171fc1b	2156	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2157	#else
shimniok	0:826c6171fc1b	2158	if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
shimniok	0:826c6171fc1b	2159	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2160	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2161	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2162	}
shimniok	0:826c6171fc1b	2163	#endif
shimniok	0:826c6171fc1b	2164	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
shimniok	0:826c6171fc1b	2165	if (!sect) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2166	sect += csect;
shimniok	0:826c6171fc1b	2167	cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
shimniok	0:826c6171fc1b	2168	if (cc) { /* Write maximum contiguous sectors directly */
shimniok	0:826c6171fc1b	2169	if (csect + cc > fp->fs->csize) /* Clip at cluster boundary */
shimniok	0:826c6171fc1b	2170	cc = fp->fs->csize - csect;
shimniok	0:826c6171fc1b	2171	if (disk_write(fp->fs->drv, wbuff, sect, (BYTE)cc) != RES_OK)
shimniok	0:826c6171fc1b	2172	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2173	#if _FS_TINY
shimniok	0:826c6171fc1b	2174	if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
shimniok	0:826c6171fc1b	2175	mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
shimniok	0:826c6171fc1b	2176	fp->fs->wflag = 0;
shimniok	0:826c6171fc1b	2177	}
shimniok	0:826c6171fc1b	2178	#else
shimniok	0:826c6171fc1b	2179	if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
shimniok	0:826c6171fc1b	2180	mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
shimniok	0:826c6171fc1b	2181	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2182	}
shimniok	0:826c6171fc1b	2183	#endif
shimniok	0:826c6171fc1b	2184	wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
shimniok	0:826c6171fc1b	2185	continue;
shimniok	0:826c6171fc1b	2186	}
shimniok	0:826c6171fc1b	2187	#if _FS_TINY
shimniok	0:826c6171fc1b	2188	if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
shimniok	0:826c6171fc1b	2189	if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2190	fp->fs->winsect = sect;
shimniok	0:826c6171fc1b	2191	}
shimniok	0:826c6171fc1b	2192	#else
shimniok	0:826c6171fc1b	2193	if (fp->dsect != sect) { /* Fill sector buffer with file data */
shimniok	0:826c6171fc1b	2194	if (fp->fptr < fp->fsize &&
shimniok	0:826c6171fc1b	2195	disk_read(fp->fs->drv, fp->buf, sect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2196	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2197	}
shimniok	0:826c6171fc1b	2198	#endif
shimniok	0:826c6171fc1b	2199	fp->dsect = sect;
shimniok	0:826c6171fc1b	2200	}
shimniok	0:826c6171fc1b	2201	wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
shimniok	0:826c6171fc1b	2202	if (wcnt > btw) wcnt = btw;
shimniok	0:826c6171fc1b	2203	#if _FS_TINY
shimniok	0:826c6171fc1b	2204	if (move_window(fp->fs, fp->dsect)) /* Move sector window */
shimniok	0:826c6171fc1b	2205	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2206	mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
shimniok	0:826c6171fc1b	2207	fp->fs->wflag = 1;
shimniok	0:826c6171fc1b	2208	#else
shimniok	0:826c6171fc1b	2209	mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
shimniok	0:826c6171fc1b	2210	fp->flag \|= FA__DIRTY;
shimniok	0:826c6171fc1b	2211	#endif
shimniok	0:826c6171fc1b	2212	}
shimniok	0:826c6171fc1b	2213
shimniok	0:826c6171fc1b	2214	if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
shimniok	0:826c6171fc1b	2215	fp->flag \|= FA__WRITTEN; /* Set file changed flag */
shimniok	0:826c6171fc1b	2216
shimniok	0:826c6171fc1b	2217	LEAVE_FF(fp->fs, FR_OK);
shimniok	0:826c6171fc1b	2218	}
shimniok	0:826c6171fc1b	2219
shimniok	0:826c6171fc1b	2220
shimniok	0:826c6171fc1b	2221
shimniok	0:826c6171fc1b	2222
shimniok	0:826c6171fc1b	2223	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2224	/* Synchronize the File Object */
shimniok	0:826c6171fc1b	2225	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2226
shimniok	0:826c6171fc1b	2227	FRESULT f_sync (
shimniok	0:826c6171fc1b	2228	FAT_FIL fp / Pointer to the file object */
shimniok	0:826c6171fc1b	2229	)
shimniok	0:826c6171fc1b	2230	{
shimniok	0:826c6171fc1b	2231	FRESULT res;
shimniok	0:826c6171fc1b	2232	DWORD tim;
shimniok	0:826c6171fc1b	2233	BYTE *dir;
shimniok	0:826c6171fc1b	2234
shimniok	0:826c6171fc1b	2235
shimniok	0:826c6171fc1b	2236	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2237	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2238	if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
shimniok	0:826c6171fc1b	2239	#if !_FS_TINY /* Write-back dirty buffer */
shimniok	0:826c6171fc1b	2240	if (fp->flag & FA__DIRTY) {
shimniok	0:826c6171fc1b	2241	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2242	LEAVE_FF(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2243	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2244	}
shimniok	0:826c6171fc1b	2245	#endif
shimniok	0:826c6171fc1b	2246	/* Update the directory entry */
shimniok	0:826c6171fc1b	2247	res = move_window(fp->fs, fp->dir_sect);
shimniok	0:826c6171fc1b	2248	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2249	dir = fp->dir_ptr;
shimniok	0:826c6171fc1b	2250	dir[DIR_Attr] \|= AM_ARC; /* Set archive bit */
shimniok	0:826c6171fc1b	2251	ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
shimniok	0:826c6171fc1b	2252	ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */
shimniok	0:826c6171fc1b	2253	ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
shimniok	0:826c6171fc1b	2254	tim = get_fattime(); /* Update updated time */
shimniok	0:826c6171fc1b	2255	ST_DWORD(dir+DIR_WrtTime, tim);
shimniok	0:826c6171fc1b	2256	fp->flag &= ~FA__WRITTEN;
shimniok	0:826c6171fc1b	2257	fp->fs->wflag = 1;
shimniok	0:826c6171fc1b	2258	res = sync(fp->fs);
shimniok	0:826c6171fc1b	2259	}
shimniok	0:826c6171fc1b	2260	}
shimniok	0:826c6171fc1b	2261	}
shimniok	0:826c6171fc1b	2262
shimniok	0:826c6171fc1b	2263	LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2264	}
shimniok	0:826c6171fc1b	2265
shimniok	0:826c6171fc1b	2266	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	2267
shimniok	0:826c6171fc1b	2268
shimniok	0:826c6171fc1b	2269
shimniok	0:826c6171fc1b	2270
shimniok	0:826c6171fc1b	2271	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2272	/* Close File */
shimniok	0:826c6171fc1b	2273	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2274
shimniok	0:826c6171fc1b	2275	FRESULT f_close (
shimniok	0:826c6171fc1b	2276	FAT_FIL fp / Pointer to the file object to be closed */
shimniok	0:826c6171fc1b	2277	)
shimniok	0:826c6171fc1b	2278	{
shimniok	0:826c6171fc1b	2279	FRESULT res;
shimniok	0:826c6171fc1b	2280
shimniok	0:826c6171fc1b	2281	#if _FS_READONLY
shimniok	0:826c6171fc1b	2282	FATFS *fs = fp->fs;
shimniok	0:826c6171fc1b	2283	res = validate(fs, fp->id);
shimniok	0:826c6171fc1b	2284	if (res == FR_OK) fp->fs = 0; /* Discard file object */
shimniok	0:826c6171fc1b	2285	LEAVE_FF(fs, res);
shimniok	0:826c6171fc1b	2286
shimniok	0:826c6171fc1b	2287	#else
shimniok	0:826c6171fc1b	2288	res = f_sync(fp); /* Flush cached data */
shimniok	0:826c6171fc1b	2289	#if _FS_SHARE
shimniok	0:826c6171fc1b	2290	if (res == FR_OK) { /* Decrement open counter */
shimniok	0:826c6171fc1b	2291	#if _FS_REENTRANT
shimniok	0:826c6171fc1b	2292	res = validate(fp->fs, fp->id);
shimniok	0:826c6171fc1b	2293	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2294	res = dec_lock(fp->fs, fp->lockid);
shimniok	0:826c6171fc1b	2295	unlock_fs(fp->fs, FR_OK);
shimniok	0:826c6171fc1b	2296	}
shimniok	0:826c6171fc1b	2297	#else
shimniok	0:826c6171fc1b	2298	res = dec_lock(fp->fs, fp->lockid);
shimniok	0:826c6171fc1b	2299	#endif
shimniok	0:826c6171fc1b	2300	}
shimniok	0:826c6171fc1b	2301	#endif
shimniok	0:826c6171fc1b	2302	if (res == FR_OK) fp->fs = 0; /* Discard file object */
shimniok	0:826c6171fc1b	2303	return res;
shimniok	0:826c6171fc1b	2304	#endif
shimniok	0:826c6171fc1b	2305	}
shimniok	0:826c6171fc1b	2306
shimniok	0:826c6171fc1b	2307
shimniok	0:826c6171fc1b	2308
shimniok	0:826c6171fc1b	2309
shimniok	0:826c6171fc1b	2310	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2311	/* Change Current Drive/Directory */
shimniok	0:826c6171fc1b	2312	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2313
shimniok	0:826c6171fc1b	2314	#if _FS_RPATH
shimniok	0:826c6171fc1b	2315
shimniok	0:826c6171fc1b	2316	FRESULT f_chdrive (
shimniok	0:826c6171fc1b	2317	BYTE drv /* Drive number */
shimniok	0:826c6171fc1b	2318	)
shimniok	0:826c6171fc1b	2319	{
shimniok	0:826c6171fc1b	2320	if (drv >= _DRIVES) return FR_INVALID_DRIVE;
shimniok	0:826c6171fc1b	2321
shimniok	0:826c6171fc1b	2322	Drive = drv;
shimniok	0:826c6171fc1b	2323
shimniok	0:826c6171fc1b	2324	return FR_OK;
shimniok	0:826c6171fc1b	2325	}
shimniok	0:826c6171fc1b	2326
shimniok	0:826c6171fc1b	2327
shimniok	0:826c6171fc1b	2328
shimniok	0:826c6171fc1b	2329
shimniok	0:826c6171fc1b	2330	FRESULT f_chdir (
shimniok	0:826c6171fc1b	2331	const TCHAR path / Pointer to the directory path */
shimniok	0:826c6171fc1b	2332	)
shimniok	0:826c6171fc1b	2333	{
shimniok	0:826c6171fc1b	2334	FRESULT res;
shimniok	0:826c6171fc1b	2335	FAT_DIR dj;
shimniok	0:826c6171fc1b	2336	BYTE *dir;
shimniok	0:826c6171fc1b	2337	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2338
shimniok	0:826c6171fc1b	2339
shimniok	0:826c6171fc1b	2340	res = chk_mounted(&path, &dj.fs, 0);
shimniok	0:826c6171fc1b	2341	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2342	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2343	res = follow_path(&dj, path); /* Follow the path */
shimniok	0:826c6171fc1b	2344	FREE_BUF();
shimniok	0:826c6171fc1b	2345	if (res == FR_OK) { /* Follow completed */
shimniok	0:826c6171fc1b	2346	dir = dj.dir; /* Pointer to the entry */
shimniok	0:826c6171fc1b	2347	if (!dir) {
shimniok	0:826c6171fc1b	2348	dj.fs->cdir = dj.sclust; /* Start directory itself */
shimniok	0:826c6171fc1b	2349	} else {
shimniok	0:826c6171fc1b	2350	if (dir[DIR_Attr] & AM_DIR) /* Reached to the directory */
shimniok	0:826c6171fc1b	2351	dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
shimniok	0:826c6171fc1b	2352	else
shimniok	0:826c6171fc1b	2353	res = FR_NO_PATH; /* Reached but a file */
shimniok	0:826c6171fc1b	2354	}
shimniok	0:826c6171fc1b	2355	}
shimniok	0:826c6171fc1b	2356	if (res == FR_NO_FILE) res = FR_NO_PATH;
shimniok	0:826c6171fc1b	2357	}
shimniok	0:826c6171fc1b	2358
shimniok	0:826c6171fc1b	2359	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2360	}
shimniok	0:826c6171fc1b	2361
shimniok	0:826c6171fc1b	2362	#endif
shimniok	0:826c6171fc1b	2363
shimniok	0:826c6171fc1b	2364
shimniok	0:826c6171fc1b	2365
shimniok	0:826c6171fc1b	2366	#if _FS_MINIMIZE <= 2
shimniok	0:826c6171fc1b	2367	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2368	/* Seek File R/W Pointer */
shimniok	0:826c6171fc1b	2369	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2370
shimniok	0:826c6171fc1b	2371	FRESULT f_lseek (
shimniok	0:826c6171fc1b	2372	FAT_FIL fp, / Pointer to the file object */
shimniok	0:826c6171fc1b	2373	DWORD ofs /* File pointer from top of file */
shimniok	0:826c6171fc1b	2374	)
shimniok	0:826c6171fc1b	2375	{
shimniok	0:826c6171fc1b	2376	FRESULT res;
shimniok	0:826c6171fc1b	2377
shimniok	0:826c6171fc1b	2378
shimniok	0:826c6171fc1b	2379	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2380	if (res != FR_OK) LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2381	if (fp->flag & FA__ERROR) /* Check abort flag */
shimniok	0:826c6171fc1b	2382	LEAVE_FF(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2383
shimniok	0:826c6171fc1b	2384	#if _USE_FASTSEEK
shimniok	0:826c6171fc1b	2385	if (fp->cltbl) { /* Fast seek */
shimniok	0:826c6171fc1b	2386	DWORD cl, pcl, ncl, tcl, dsc, tlen, *tbl = fp->cltbl;
shimniok	0:826c6171fc1b	2387	BYTE csc;
shimniok	0:826c6171fc1b	2388
shimniok	0:826c6171fc1b	2389	tlen = *tbl++;
shimniok	0:826c6171fc1b	2390	if (ofs == CREATE_LINKMAP) { /* Create link map table */
shimniok	0:826c6171fc1b	2391	cl = fp->org_clust;
shimniok	0:826c6171fc1b	2392	if (cl) {
shimniok	0:826c6171fc1b	2393	do {
shimniok	0:826c6171fc1b	2394	if (tlen < 4) { /* Not enough table items */
shimniok	0:826c6171fc1b	2395	res = FR_NOT_ENOUGH_CORE; break;
shimniok	0:826c6171fc1b	2396	}
shimniok	0:826c6171fc1b	2397	tcl = cl; ncl = 0;
shimniok	0:826c6171fc1b	2398	do { /* Get a fragment and store the top and length */
shimniok	0:826c6171fc1b	2399	pcl = cl; ncl++;
shimniok	0:826c6171fc1b	2400	cl = get_fat(fp->fs, cl);
shimniok	0:826c6171fc1b	2401	if (cl <= 1) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2402	if (cl == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2403	} while (cl == pcl + 1);
shimniok	0:826c6171fc1b	2404	tbl++ = ncl; tbl++ = tcl;
shimniok	0:826c6171fc1b	2405	tlen -= 2;
shimniok	0:826c6171fc1b	2406	} while (cl < fp->fs->n_fatent);
shimniok	0:826c6171fc1b	2407	}
shimniok	0:826c6171fc1b	2408	tbl = 0; / Terminate table */
shimniok	0:826c6171fc1b	2409
shimniok	0:826c6171fc1b	2410	} else { /* Fast seek */
shimniok	0:826c6171fc1b	2411	if (ofs > fp->fsize) /* Clip offset at the file size */
shimniok	0:826c6171fc1b	2412	ofs = fp->fsize;
shimniok	0:826c6171fc1b	2413	fp->fptr = ofs; /* Set file pointer */
shimniok	0:826c6171fc1b	2414	if (ofs) {
shimniok	0:826c6171fc1b	2415	dsc = (ofs - 1) / SS(fp->fs);
shimniok	0:826c6171fc1b	2416	cl = dsc / fp->fs->csize;
shimniok	0:826c6171fc1b	2417	for (;;) {
shimniok	0:826c6171fc1b	2418	ncl = *tbl++;
shimniok	0:826c6171fc1b	2419	if (!ncl) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2420	if (cl < ncl) break;
shimniok	0:826c6171fc1b	2421	cl -= ncl; tbl++;
shimniok	0:826c6171fc1b	2422	}
shimniok	0:826c6171fc1b	2423	fp->curr_clust = cl + *tbl;
shimniok	0:826c6171fc1b	2424	csc = (BYTE)(dsc & (fp->fs->csize - 1));
shimniok	0:826c6171fc1b	2425	dsc = clust2sect(fp->fs, fp->curr_clust);
shimniok	0:826c6171fc1b	2426	if (!dsc) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2427	dsc += csc;
shimniok	0:826c6171fc1b	2428	if (fp->fptr % SS(fp->fs) && dsc != fp->dsect) {
shimniok	0:826c6171fc1b	2429	#if !_FS_TINY
shimniok	0:826c6171fc1b	2430	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2431	if (fp->flag & FA__DIRTY) { /* Flush dirty buffer if needed */
shimniok	0:826c6171fc1b	2432	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2433	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2434	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2435	}
shimniok	0:826c6171fc1b	2436	#endif
shimniok	0:826c6171fc1b	2437	if (disk_read(fp->fs->drv, fp->buf, dsc, 1) != RES_OK)
shimniok	0:826c6171fc1b	2438	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2439	#endif
shimniok	0:826c6171fc1b	2440	fp->dsect = dsc;
shimniok	0:826c6171fc1b	2441	}
shimniok	0:826c6171fc1b	2442	}
shimniok	0:826c6171fc1b	2443	}
shimniok	0:826c6171fc1b	2444	} else
shimniok	0:826c6171fc1b	2445	#endif
shimniok	0:826c6171fc1b	2446
shimniok	0:826c6171fc1b	2447	/* Normal Seek */
shimniok	0:826c6171fc1b	2448	{
shimniok	0:826c6171fc1b	2449	DWORD clst, bcs, nsect, ifptr;
shimniok	0:826c6171fc1b	2450
shimniok	0:826c6171fc1b	2451	if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
shimniok	0:826c6171fc1b	2452	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2453	&& !(fp->flag & FA_WRITE)
shimniok	0:826c6171fc1b	2454	#endif
shimniok	0:826c6171fc1b	2455	) ofs = fp->fsize;
shimniok	0:826c6171fc1b	2456
shimniok	0:826c6171fc1b	2457	ifptr = fp->fptr;
shimniok	0:826c6171fc1b	2458	fp->fptr = nsect = 0;
shimniok	0:826c6171fc1b	2459	if (ofs) {
shimniok	0:826c6171fc1b	2460	bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
shimniok	0:826c6171fc1b	2461	if (ifptr > 0 &&
shimniok	0:826c6171fc1b	2462	(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
shimniok	0:826c6171fc1b	2463	fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
shimniok	0:826c6171fc1b	2464	ofs -= fp->fptr;
shimniok	0:826c6171fc1b	2465	clst = fp->curr_clust;
shimniok	0:826c6171fc1b	2466	} else { /* When seek to back cluster, */
shimniok	0:826c6171fc1b	2467	clst = fp->org_clust; /* start from the first cluster */
shimniok	0:826c6171fc1b	2468	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2469	if (clst == 0) { /* If no cluster chain, create a new chain */
shimniok	0:826c6171fc1b	2470	clst = create_chain(fp->fs, 0);
shimniok	0:826c6171fc1b	2471	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2472	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2473	fp->org_clust = clst;
shimniok	0:826c6171fc1b	2474	}
shimniok	0:826c6171fc1b	2475	#endif
shimniok	0:826c6171fc1b	2476	fp->curr_clust = clst;
shimniok	0:826c6171fc1b	2477	}
shimniok	0:826c6171fc1b	2478	if (clst != 0) {
shimniok	0:826c6171fc1b	2479	while (ofs > bcs) { /* Cluster following loop */
shimniok	0:826c6171fc1b	2480	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2481	if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
shimniok	0:826c6171fc1b	2482	clst = create_chain(fp->fs, clst); /* Force stretch if in write mode */
shimniok	0:826c6171fc1b	2483	if (clst == 0) { /* When disk gets full, clip file size */
shimniok	0:826c6171fc1b	2484	ofs = bcs; break;
shimniok	0:826c6171fc1b	2485	}
shimniok	0:826c6171fc1b	2486	} else
shimniok	0:826c6171fc1b	2487	#endif
shimniok	0:826c6171fc1b	2488	clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
shimniok	0:826c6171fc1b	2489	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2490	if (clst <= 1 \|\| clst >= fp->fs->n_fatent) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2491	fp->curr_clust = clst;
shimniok	0:826c6171fc1b	2492	fp->fptr += bcs;
shimniok	0:826c6171fc1b	2493	ofs -= bcs;
shimniok	0:826c6171fc1b	2494	}
shimniok	0:826c6171fc1b	2495	fp->fptr += ofs;
shimniok	0:826c6171fc1b	2496	if (ofs % SS(fp->fs)) {
shimniok	0:826c6171fc1b	2497	nsect = clust2sect(fp->fs, clst); /* Current sector */
shimniok	0:826c6171fc1b	2498	if (!nsect) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	2499	nsect += ofs / SS(fp->fs);
shimniok	0:826c6171fc1b	2500	}
shimniok	0:826c6171fc1b	2501	}
shimniok	0:826c6171fc1b	2502	}
shimniok	0:826c6171fc1b	2503	if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
shimniok	0:826c6171fc1b	2504	#if !_FS_TINY
shimniok	0:826c6171fc1b	2505	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2506	if (fp->flag & FA__DIRTY) { /* Flush dirty buffer if needed */
shimniok	0:826c6171fc1b	2507	if (disk_write(fp->fs->drv, fp->buf, fp->dsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2508	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2509	fp->flag &= ~FA__DIRTY;
shimniok	0:826c6171fc1b	2510	}
shimniok	0:826c6171fc1b	2511	#endif
shimniok	0:826c6171fc1b	2512	if (disk_read(fp->fs->drv, fp->buf, nsect, 1) != RES_OK)
shimniok	0:826c6171fc1b	2513	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	2514	#endif
shimniok	0:826c6171fc1b	2515	fp->dsect = nsect;
shimniok	0:826c6171fc1b	2516	}
shimniok	0:826c6171fc1b	2517	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2518	if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
shimniok	0:826c6171fc1b	2519	fp->fsize = fp->fptr;
shimniok	0:826c6171fc1b	2520	fp->flag \|= FA__WRITTEN;
shimniok	0:826c6171fc1b	2521	}
shimniok	0:826c6171fc1b	2522	#endif
shimniok	0:826c6171fc1b	2523	}
shimniok	0:826c6171fc1b	2524
shimniok	0:826c6171fc1b	2525	LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2526	}
shimniok	0:826c6171fc1b	2527
shimniok	0:826c6171fc1b	2528
shimniok	0:826c6171fc1b	2529
shimniok	0:826c6171fc1b	2530	#if _FS_MINIMIZE <= 1
shimniok	0:826c6171fc1b	2531	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2532	/* Create a Directroy Object */
shimniok	0:826c6171fc1b	2533	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2534
shimniok	0:826c6171fc1b	2535	FRESULT f_opendir (
shimniok	0:826c6171fc1b	2536	FAT_DIR dj, / Pointer to directory object to create */
shimniok	0:826c6171fc1b	2537	const TCHAR path / Pointer to the directory path */
shimniok	0:826c6171fc1b	2538	)
shimniok	0:826c6171fc1b	2539	{
shimniok	0:826c6171fc1b	2540	FRESULT res;
shimniok	0:826c6171fc1b	2541	BYTE *dir;
shimniok	0:826c6171fc1b	2542	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2543
shimniok	0:826c6171fc1b	2544
shimniok	0:826c6171fc1b	2545	res = chk_mounted(&path, &dj->fs, 0);
shimniok	0:826c6171fc1b	2546	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2547	INIT_BUF(*dj);
shimniok	0:826c6171fc1b	2548	res = follow_path(dj, path); /* Follow the path to the directory */
shimniok	0:826c6171fc1b	2549	FREE_BUF();
shimniok	0:826c6171fc1b	2550	if (res == FR_OK) { /* Follow completed */
shimniok	0:826c6171fc1b	2551	dir = dj->dir;
shimniok	0:826c6171fc1b	2552	if (dir) { /* It is not the current dir */
shimniok	0:826c6171fc1b	2553	if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
shimniok	0:826c6171fc1b	2554	dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
shimniok	0:826c6171fc1b	2555	} else { /* The object is not a directory */
shimniok	0:826c6171fc1b	2556	res = FR_NO_PATH;
shimniok	0:826c6171fc1b	2557	}
shimniok	0:826c6171fc1b	2558	}
shimniok	0:826c6171fc1b	2559	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2560	dj->id = dj->fs->id;
shimniok	0:826c6171fc1b	2561	res = dir_sdi(dj, 0); /* Rewind dir */
shimniok	0:826c6171fc1b	2562	}
shimniok	0:826c6171fc1b	2563	}
shimniok	0:826c6171fc1b	2564	if (res == FR_NO_FILE) res = FR_NO_PATH;
shimniok	0:826c6171fc1b	2565	}
shimniok	0:826c6171fc1b	2566
shimniok	0:826c6171fc1b	2567	LEAVE_FF(dj->fs, res);
shimniok	0:826c6171fc1b	2568	}
shimniok	0:826c6171fc1b	2569
shimniok	0:826c6171fc1b	2570
shimniok	0:826c6171fc1b	2571
shimniok	0:826c6171fc1b	2572
shimniok	0:826c6171fc1b	2573	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2574	/* Read Directory Entry in Sequense */
shimniok	0:826c6171fc1b	2575	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2576
shimniok	0:826c6171fc1b	2577	FRESULT f_readdir (
shimniok	0:826c6171fc1b	2578	FAT_DIR dj, / Pointer to the open directory object */
shimniok	0:826c6171fc1b	2579	FILINFO fno / Pointer to file information to return */
shimniok	0:826c6171fc1b	2580	)
shimniok	0:826c6171fc1b	2581	{
shimniok	0:826c6171fc1b	2582	FRESULT res;
shimniok	0:826c6171fc1b	2583	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2584
shimniok	0:826c6171fc1b	2585
shimniok	0:826c6171fc1b	2586	res = validate(dj->fs, dj->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2587	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2588	if (!fno) {
shimniok	0:826c6171fc1b	2589	res = dir_sdi(dj, 0);
shimniok	0:826c6171fc1b	2590	} else {
shimniok	0:826c6171fc1b	2591	INIT_BUF(*dj);
shimniok	0:826c6171fc1b	2592	res = dir_read(dj);
shimniok	0:826c6171fc1b	2593	if (res == FR_NO_FILE) {
shimniok	0:826c6171fc1b	2594	dj->sect = 0;
shimniok	0:826c6171fc1b	2595	res = FR_OK;
shimniok	0:826c6171fc1b	2596	}
shimniok	0:826c6171fc1b	2597	if (res == FR_OK) { /* A valid entry is found */
shimniok	0:826c6171fc1b	2598	get_fileinfo(dj, fno); /* Get the object information */
shimniok	0:826c6171fc1b	2599	res = dir_next(dj, 0); /* Increment index for next */
shimniok	0:826c6171fc1b	2600	if (res == FR_NO_FILE) {
shimniok	0:826c6171fc1b	2601	dj->sect = 0;
shimniok	0:826c6171fc1b	2602	res = FR_OK;
shimniok	0:826c6171fc1b	2603	}
shimniok	0:826c6171fc1b	2604	}
shimniok	0:826c6171fc1b	2605	FREE_BUF();
shimniok	0:826c6171fc1b	2606	}
shimniok	0:826c6171fc1b	2607	}
shimniok	0:826c6171fc1b	2608
shimniok	0:826c6171fc1b	2609	LEAVE_FF(dj->fs, res);
shimniok	0:826c6171fc1b	2610	}
shimniok	0:826c6171fc1b	2611
shimniok	0:826c6171fc1b	2612
shimniok	0:826c6171fc1b	2613
shimniok	0:826c6171fc1b	2614	#if _FS_MINIMIZE == 0
shimniok	0:826c6171fc1b	2615	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2616	/* Get File Status */
shimniok	0:826c6171fc1b	2617	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2618
shimniok	0:826c6171fc1b	2619	FRESULT f_stat (
shimniok	0:826c6171fc1b	2620	const TCHAR path, / Pointer to the file path */
shimniok	0:826c6171fc1b	2621	FILINFO fno / Pointer to file information to return */
shimniok	0:826c6171fc1b	2622	)
shimniok	0:826c6171fc1b	2623	{
shimniok	0:826c6171fc1b	2624	FRESULT res;
shimniok	0:826c6171fc1b	2625	FAT_DIR dj;
shimniok	0:826c6171fc1b	2626	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2627
shimniok	0:826c6171fc1b	2628
shimniok	0:826c6171fc1b	2629	res = chk_mounted(&path, &dj.fs, 0);
shimniok	0:826c6171fc1b	2630	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2631	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2632	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	2633	if (res == FR_OK) { /* Follow completed */
shimniok	0:826c6171fc1b	2634	if (dj.dir) /* Found an object */
shimniok	0:826c6171fc1b	2635	get_fileinfo(&dj, fno);
shimniok	0:826c6171fc1b	2636	else /* It is root dir */
shimniok	0:826c6171fc1b	2637	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2638	}
shimniok	0:826c6171fc1b	2639	FREE_BUF();
shimniok	0:826c6171fc1b	2640	}
shimniok	0:826c6171fc1b	2641
shimniok	0:826c6171fc1b	2642	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2643	}
shimniok	0:826c6171fc1b	2644
shimniok	0:826c6171fc1b	2645
shimniok	0:826c6171fc1b	2646
shimniok	0:826c6171fc1b	2647	#if !_FS_READONLY
shimniok	0:826c6171fc1b	2648	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2649	/* Get Number of Free Clusters */
shimniok	0:826c6171fc1b	2650	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2651
shimniok	0:826c6171fc1b	2652	FRESULT f_getfree (
shimniok	0:826c6171fc1b	2653	const TCHAR path, / Pointer to the logical drive number (root dir) */
shimniok	0:826c6171fc1b	2654	DWORD nclst, / Pointer to the variable to return number of free clusters */
shimniok	0:826c6171fc1b	2655	FATFS *fatfs / Pointer to pointer to corresponding file system object to return */
shimniok	0:826c6171fc1b	2656	)
shimniok	0:826c6171fc1b	2657	{
shimniok	0:826c6171fc1b	2658	FRESULT res;
shimniok	0:826c6171fc1b	2659	DWORD n, clst, sect, stat;
shimniok	0:826c6171fc1b	2660	UINT i;
shimniok	0:826c6171fc1b	2661	BYTE fat, *p;
shimniok	0:826c6171fc1b	2662
shimniok	0:826c6171fc1b	2663
shimniok	0:826c6171fc1b	2664	/* Get drive number */
shimniok	0:826c6171fc1b	2665	res = chk_mounted(&path, fatfs, 0);
shimniok	0:826c6171fc1b	2666	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2667	/* If free_clust is valid, return it without full cluster scan */
shimniok	0:826c6171fc1b	2668	if ((fatfs)->free_clust <= (fatfs)->n_fatent - 2) {
shimniok	0:826c6171fc1b	2669	nclst = (fatfs)->free_clust;
shimniok	0:826c6171fc1b	2670	} else {
shimniok	0:826c6171fc1b	2671	/* Get number of free clusters */
shimniok	0:826c6171fc1b	2672	fat = (*fatfs)->fs_type;
shimniok	0:826c6171fc1b	2673	n = 0;
shimniok	0:826c6171fc1b	2674	if (fat == FS_FAT12) {
shimniok	0:826c6171fc1b	2675	clst = 2;
shimniok	0:826c6171fc1b	2676	do {
shimniok	0:826c6171fc1b	2677	stat = get_fat(*fatfs, clst);
shimniok	0:826c6171fc1b	2678	if (stat == 0xFFFFFFFF) { res = FR_DISK_ERR; break; }
shimniok	0:826c6171fc1b	2679	if (stat == 1) { res = FR_INT_ERR; break; }
shimniok	0:826c6171fc1b	2680	if (stat == 0) n++;
shimniok	0:826c6171fc1b	2681	} while (++clst < (*fatfs)->n_fatent);
shimniok	0:826c6171fc1b	2682	} else {
shimniok	0:826c6171fc1b	2683	clst = (*fatfs)->n_fatent;
shimniok	0:826c6171fc1b	2684	sect = (*fatfs)->fatbase;
shimniok	0:826c6171fc1b	2685	i = 0; p = 0;
shimniok	0:826c6171fc1b	2686	do {
shimniok	0:826c6171fc1b	2687	if (!i) {
shimniok	0:826c6171fc1b	2688	res = move_window(*fatfs, sect++);
shimniok	0:826c6171fc1b	2689	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	2690	p = (*fatfs)->win;
shimniok	0:826c6171fc1b	2691	i = SS(*fatfs);
shimniok	0:826c6171fc1b	2692	}
shimniok	0:826c6171fc1b	2693	if (fat == FS_FAT16) {
shimniok	0:826c6171fc1b	2694	if (LD_WORD(p) == 0) n++;
shimniok	0:826c6171fc1b	2695	p += 2; i -= 2;
shimniok	0:826c6171fc1b	2696	} else {
shimniok	0:826c6171fc1b	2697	if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
shimniok	0:826c6171fc1b	2698	p += 4; i -= 4;
shimniok	0:826c6171fc1b	2699	}
shimniok	0:826c6171fc1b	2700	} while (--clst);
shimniok	0:826c6171fc1b	2701	}
shimniok	0:826c6171fc1b	2702	(*fatfs)->free_clust = n;
shimniok	0:826c6171fc1b	2703	if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
shimniok	0:826c6171fc1b	2704	*nclst = n;
shimniok	0:826c6171fc1b	2705	}
shimniok	0:826c6171fc1b	2706	}
shimniok	0:826c6171fc1b	2707	LEAVE_FF(*fatfs, res);
shimniok	0:826c6171fc1b	2708	}
shimniok	0:826c6171fc1b	2709
shimniok	0:826c6171fc1b	2710
shimniok	0:826c6171fc1b	2711
shimniok	0:826c6171fc1b	2712
shimniok	0:826c6171fc1b	2713	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2714	/* Truncate File */
shimniok	0:826c6171fc1b	2715	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2716
shimniok	0:826c6171fc1b	2717	FRESULT f_truncate (
shimniok	0:826c6171fc1b	2718	FAT_FIL fp / Pointer to the file object */
shimniok	0:826c6171fc1b	2719	)
shimniok	0:826c6171fc1b	2720	{
shimniok	0:826c6171fc1b	2721	FRESULT res;
shimniok	0:826c6171fc1b	2722	DWORD ncl;
shimniok	0:826c6171fc1b	2723
shimniok	0:826c6171fc1b	2724
shimniok	0:826c6171fc1b	2725	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	2726	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2727	if (fp->flag & FA__ERROR) { /* Check abort flag */
shimniok	0:826c6171fc1b	2728	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	2729	} else {
shimniok	0:826c6171fc1b	2730	if (!(fp->flag & FA_WRITE)) /* Check access mode */
shimniok	0:826c6171fc1b	2731	res = FR_DENIED;
shimniok	0:826c6171fc1b	2732	}
shimniok	0:826c6171fc1b	2733	}
shimniok	0:826c6171fc1b	2734	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2735	if (fp->fsize > fp->fptr) {
shimniok	0:826c6171fc1b	2736	fp->fsize = fp->fptr; /* Set file size to current R/W point */
shimniok	0:826c6171fc1b	2737	fp->flag \|= FA__WRITTEN;
shimniok	0:826c6171fc1b	2738	if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
shimniok	0:826c6171fc1b	2739	res = remove_chain(fp->fs, fp->org_clust);
shimniok	0:826c6171fc1b	2740	fp->org_clust = 0;
shimniok	0:826c6171fc1b	2741	} else { /* When truncate a part of the file, remove remaining clusters */
shimniok	0:826c6171fc1b	2742	ncl = get_fat(fp->fs, fp->curr_clust);
shimniok	0:826c6171fc1b	2743	res = FR_OK;
shimniok	0:826c6171fc1b	2744	if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
shimniok	0:826c6171fc1b	2745	if (ncl == 1) res = FR_INT_ERR;
shimniok	0:826c6171fc1b	2746	if (res == FR_OK && ncl < fp->fs->n_fatent) {
shimniok	0:826c6171fc1b	2747	res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
shimniok	0:826c6171fc1b	2748	if (res == FR_OK) res = remove_chain(fp->fs, ncl);
shimniok	0:826c6171fc1b	2749	}
shimniok	0:826c6171fc1b	2750	}
shimniok	0:826c6171fc1b	2751	}
shimniok	0:826c6171fc1b	2752	if (res != FR_OK) fp->flag \|= FA__ERROR;
shimniok	0:826c6171fc1b	2753	}
shimniok	0:826c6171fc1b	2754
shimniok	0:826c6171fc1b	2755	LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	2756	}
shimniok	0:826c6171fc1b	2757
shimniok	0:826c6171fc1b	2758
shimniok	0:826c6171fc1b	2759
shimniok	0:826c6171fc1b	2760
shimniok	0:826c6171fc1b	2761	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2762	/* Delete a File or Directory */
shimniok	0:826c6171fc1b	2763	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2764
shimniok	0:826c6171fc1b	2765	FRESULT f_unlink (
shimniok	0:826c6171fc1b	2766	const TCHAR path / Pointer to the file or directory path */
shimniok	0:826c6171fc1b	2767	)
shimniok	0:826c6171fc1b	2768	{
shimniok	0:826c6171fc1b	2769	FRESULT res;
shimniok	0:826c6171fc1b	2770	FAT_DIR dj, sdj;
shimniok	0:826c6171fc1b	2771	BYTE *dir;
shimniok	0:826c6171fc1b	2772	DWORD dclst;
shimniok	0:826c6171fc1b	2773	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2774
shimniok	0:826c6171fc1b	2775
shimniok	0:826c6171fc1b	2776	res = chk_mounted(&path, &dj.fs, 1);
shimniok	0:826c6171fc1b	2777	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2778	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2779	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	2780	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
shimniok	0:826c6171fc1b	2781	res = FR_INVALID_NAME; /* Cannot remove dot entry */
shimniok	0:826c6171fc1b	2782	#if _FS_SHARE
shimniok	0:826c6171fc1b	2783	if (res == FR_OK) res = chk_lock(&dj, 2); /* Cannot remove open file */
shimniok	0:826c6171fc1b	2784	#endif
shimniok	0:826c6171fc1b	2785	if (res == FR_OK) { /* The object is accessible */
shimniok	0:826c6171fc1b	2786	dir = dj.dir;
shimniok	0:826c6171fc1b	2787	if (!dir) {
shimniok	0:826c6171fc1b	2788	res = FR_INVALID_NAME; /* Cannot remove the start directory */
shimniok	0:826c6171fc1b	2789	} else {
shimniok	0:826c6171fc1b	2790	if (dir[DIR_Attr] & AM_RDO)
shimniok	0:826c6171fc1b	2791	res = FR_DENIED; /* Cannot remove R/O object */
shimniok	0:826c6171fc1b	2792	}
shimniok	0:826c6171fc1b	2793	dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
shimniok	0:826c6171fc1b	2794	if (res == FR_OK && (dir[DIR_Attr] & AM_DIR)) { /* Is it a sub-dir? */
shimniok	0:826c6171fc1b	2795	if (dclst < 2) {
shimniok	0:826c6171fc1b	2796	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	2797	} else {
shimniok	0:826c6171fc1b	2798	mem_cpy(&sdj, &dj, sizeof(FAT_DIR)); /* Check if the sub-dir is empty or not */
shimniok	0:826c6171fc1b	2799	sdj.sclust = dclst;
shimniok	0:826c6171fc1b	2800	res = dir_sdi(&sdj, 2); /* Exclude dot entries */
shimniok	0:826c6171fc1b	2801	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2802	res = dir_read(&sdj);
shimniok	0:826c6171fc1b	2803	if (res == FR_OK /* Not empty dir */
shimniok	0:826c6171fc1b	2804	#if _FS_RPATH
shimniok	0:826c6171fc1b	2805	\|\| dclst == sdj.fs->cdir /* Current dir */
shimniok	0:826c6171fc1b	2806	#endif
shimniok	0:826c6171fc1b	2807	) res = FR_DENIED;
shimniok	0:826c6171fc1b	2808	if (res == FR_NO_FILE) res = FR_OK; /* Empty */
shimniok	0:826c6171fc1b	2809	}
shimniok	0:826c6171fc1b	2810	}
shimniok	0:826c6171fc1b	2811	}
shimniok	0:826c6171fc1b	2812	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2813	res = dir_remove(&dj); /* Remove the directory entry */
shimniok	0:826c6171fc1b	2814	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2815	if (dclst) /* Remove the cluster chain if exist */
shimniok	0:826c6171fc1b	2816	res = remove_chain(dj.fs, dclst);
shimniok	0:826c6171fc1b	2817	if (res == FR_OK) res = sync(dj.fs);
shimniok	0:826c6171fc1b	2818	}
shimniok	0:826c6171fc1b	2819	}
shimniok	0:826c6171fc1b	2820	}
shimniok	0:826c6171fc1b	2821	FREE_BUF();
shimniok	0:826c6171fc1b	2822	}
shimniok	0:826c6171fc1b	2823	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2824	}
shimniok	0:826c6171fc1b	2825
shimniok	0:826c6171fc1b	2826
shimniok	0:826c6171fc1b	2827
shimniok	0:826c6171fc1b	2828
shimniok	0:826c6171fc1b	2829	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2830	/* Create a Directory */
shimniok	0:826c6171fc1b	2831	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2832
shimniok	0:826c6171fc1b	2833	FRESULT f_mkdir (
shimniok	0:826c6171fc1b	2834	const TCHAR path / Pointer to the directory path */
shimniok	0:826c6171fc1b	2835	)
shimniok	0:826c6171fc1b	2836	{
shimniok	0:826c6171fc1b	2837	FRESULT res;
shimniok	0:826c6171fc1b	2838	FAT_DIR dj;
shimniok	0:826c6171fc1b	2839	BYTE *dir, n;
shimniok	0:826c6171fc1b	2840	DWORD dsc, dcl, pcl, tim = get_fattime();
shimniok	0:826c6171fc1b	2841	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2842
shimniok	0:826c6171fc1b	2843
shimniok	0:826c6171fc1b	2844	res = chk_mounted(&path, &dj.fs, 1);
shimniok	0:826c6171fc1b	2845	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2846	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2847	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	2848	if (res == FR_OK) res = FR_EXIST; /* Any object with same name is already existing */
shimniok	0:826c6171fc1b	2849	if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
shimniok	0:826c6171fc1b	2850	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2851	if (res == FR_NO_FILE) { /* Can create a new directory */
shimniok	0:826c6171fc1b	2852	dcl = create_chain(dj.fs, 0); /* Allocate a cluster for the new directory table */
shimniok	0:826c6171fc1b	2853	res = FR_OK;
shimniok	0:826c6171fc1b	2854	if (dcl == 0) res = FR_DENIED; /* No space to allocate a new cluster */
shimniok	0:826c6171fc1b	2855	if (dcl == 1) res = FR_INT_ERR;
shimniok	0:826c6171fc1b	2856	if (dcl == 0xFFFFFFFF) res = FR_DISK_ERR;
shimniok	0:826c6171fc1b	2857	if (res == FR_OK) /* Flush FAT */
shimniok	0:826c6171fc1b	2858	res = move_window(dj.fs, 0);
shimniok	0:826c6171fc1b	2859	if (res == FR_OK) { /* Initialize the new directory table */
shimniok	0:826c6171fc1b	2860	dsc = clust2sect(dj.fs, dcl);
shimniok	0:826c6171fc1b	2861	dir = dj.fs->win;
shimniok	0:826c6171fc1b	2862	mem_set(dir, 0, SS(dj.fs));
shimniok	0:826c6171fc1b	2863	mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
shimniok	0:826c6171fc1b	2864	dir[DIR_Name] = '.';
shimniok	0:826c6171fc1b	2865	dir[DIR_Attr] = AM_DIR;
shimniok	0:826c6171fc1b	2866	ST_DWORD(dir+DIR_WrtTime, tim);
shimniok	0:826c6171fc1b	2867	ST_WORD(dir+DIR_FstClusLO, dcl);
shimniok	0:826c6171fc1b	2868	ST_WORD(dir+DIR_FstClusHI, dcl >> 16);
shimniok	0:826c6171fc1b	2869	mem_cpy(dir+32, dir, 32); /* Create ".." entry */
shimniok	0:826c6171fc1b	2870	dir[33] = '.'; pcl = dj.sclust;
shimniok	0:826c6171fc1b	2871	if (dj.fs->fs_type == FS_FAT32 && pcl == dj.fs->dirbase)
shimniok	0:826c6171fc1b	2872	pcl = 0;
shimniok	0:826c6171fc1b	2873	ST_WORD(dir+32+DIR_FstClusLO, pcl);
shimniok	0:826c6171fc1b	2874	ST_WORD(dir+32+DIR_FstClusHI, pcl >> 16);
shimniok	0:826c6171fc1b	2875	for (n = dj.fs->csize; n; n--) { /* Write dot entries and clear following sectors */
shimniok	0:826c6171fc1b	2876	dj.fs->winsect = dsc++;
shimniok	0:826c6171fc1b	2877	dj.fs->wflag = 1;
shimniok	0:826c6171fc1b	2878	res = move_window(dj.fs, 0);
shimniok	0:826c6171fc1b	2879	if (res != FR_OK) break;
shimniok	0:826c6171fc1b	2880	mem_set(dir, 0, SS(dj.fs));
shimniok	0:826c6171fc1b	2881	}
shimniok	0:826c6171fc1b	2882	}
shimniok	0:826c6171fc1b	2883	if (res == FR_OK) res = dir_register(&dj); /* Register the object to the directoy */
shimniok	0:826c6171fc1b	2884	if (res != FR_OK) {
shimniok	0:826c6171fc1b	2885	remove_chain(dj.fs, dcl); /* Could not register, remove cluster chain */
shimniok	0:826c6171fc1b	2886	} else {
shimniok	0:826c6171fc1b	2887	dir = dj.dir;
shimniok	0:826c6171fc1b	2888	dir[DIR_Attr] = AM_DIR; /* Attribute */
shimniok	0:826c6171fc1b	2889	ST_DWORD(dir+DIR_WrtTime, tim); /* Created time */
shimniok	0:826c6171fc1b	2890	ST_WORD(dir+DIR_FstClusLO, dcl); /* Table start cluster */
shimniok	0:826c6171fc1b	2891	ST_WORD(dir+DIR_FstClusHI, dcl >> 16);
shimniok	0:826c6171fc1b	2892	dj.fs->wflag = 1;
shimniok	0:826c6171fc1b	2893	res = sync(dj.fs);
shimniok	0:826c6171fc1b	2894	}
shimniok	0:826c6171fc1b	2895	}
shimniok	0:826c6171fc1b	2896	FREE_BUF();
shimniok	0:826c6171fc1b	2897	}
shimniok	0:826c6171fc1b	2898
shimniok	0:826c6171fc1b	2899	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2900	}
shimniok	0:826c6171fc1b	2901
shimniok	0:826c6171fc1b	2902
shimniok	0:826c6171fc1b	2903
shimniok	0:826c6171fc1b	2904
shimniok	0:826c6171fc1b	2905	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2906	/* Change Attribute */
shimniok	0:826c6171fc1b	2907	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2908
shimniok	0:826c6171fc1b	2909	FRESULT f_chmod (
shimniok	0:826c6171fc1b	2910	const TCHAR path, / Pointer to the file path */
shimniok	0:826c6171fc1b	2911	BYTE value, /* Attribute bits */
shimniok	0:826c6171fc1b	2912	BYTE mask /* Attribute mask to change */
shimniok	0:826c6171fc1b	2913	)
shimniok	0:826c6171fc1b	2914	{
shimniok	0:826c6171fc1b	2915	FRESULT res;
shimniok	0:826c6171fc1b	2916	FAT_DIR dj;
shimniok	0:826c6171fc1b	2917	BYTE *dir;
shimniok	0:826c6171fc1b	2918	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2919
shimniok	0:826c6171fc1b	2920
shimniok	0:826c6171fc1b	2921	res = chk_mounted(&path, &dj.fs, 1);
shimniok	0:826c6171fc1b	2922	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2923	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2924	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	2925	FREE_BUF();
shimniok	0:826c6171fc1b	2926	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
shimniok	0:826c6171fc1b	2927	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2928	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2929	dir = dj.dir;
shimniok	0:826c6171fc1b	2930	if (!dir) { /* Is it a root directory? */
shimniok	0:826c6171fc1b	2931	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2932	} else { /* File or sub directory */
shimniok	0:826c6171fc1b	2933	mask &= AM_RDO\|AM_HID\|AM_SYS\|AM_ARC; /* Valid attribute mask */
shimniok	0:826c6171fc1b	2934	dir[DIR_Attr] = (value & mask) \| (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
shimniok	0:826c6171fc1b	2935	dj.fs->wflag = 1;
shimniok	0:826c6171fc1b	2936	res = sync(dj.fs);
shimniok	0:826c6171fc1b	2937	}
shimniok	0:826c6171fc1b	2938	}
shimniok	0:826c6171fc1b	2939	}
shimniok	0:826c6171fc1b	2940
shimniok	0:826c6171fc1b	2941	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2942	}
shimniok	0:826c6171fc1b	2943
shimniok	0:826c6171fc1b	2944
shimniok	0:826c6171fc1b	2945
shimniok	0:826c6171fc1b	2946
shimniok	0:826c6171fc1b	2947	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2948	/* Change Timestamp */
shimniok	0:826c6171fc1b	2949	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2950
shimniok	0:826c6171fc1b	2951	FRESULT f_utime (
shimniok	0:826c6171fc1b	2952	const TCHAR path, / Pointer to the file/directory name */
shimniok	0:826c6171fc1b	2953	const FILINFO fno / Pointer to the time stamp to be set */
shimniok	0:826c6171fc1b	2954	)
shimniok	0:826c6171fc1b	2955	{
shimniok	0:826c6171fc1b	2956	FRESULT res;
shimniok	0:826c6171fc1b	2957	FAT_DIR dj;
shimniok	0:826c6171fc1b	2958	BYTE *dir;
shimniok	0:826c6171fc1b	2959	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	2960
shimniok	0:826c6171fc1b	2961
shimniok	0:826c6171fc1b	2962	res = chk_mounted(&path, &dj.fs, 1);
shimniok	0:826c6171fc1b	2963	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2964	INIT_BUF(dj);
shimniok	0:826c6171fc1b	2965	res = follow_path(&dj, path); /* Follow the file path */
shimniok	0:826c6171fc1b	2966	FREE_BUF();
shimniok	0:826c6171fc1b	2967	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
shimniok	0:826c6171fc1b	2968	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2969	if (res == FR_OK) {
shimniok	0:826c6171fc1b	2970	dir = dj.dir;
shimniok	0:826c6171fc1b	2971	if (!dir) { /* Root directory */
shimniok	0:826c6171fc1b	2972	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	2973	} else { /* File or sub-directory */
shimniok	0:826c6171fc1b	2974	ST_WORD(dir+DIR_WrtTime, fno->ftime);
shimniok	0:826c6171fc1b	2975	ST_WORD(dir+DIR_WrtDate, fno->fdate);
shimniok	0:826c6171fc1b	2976	dj.fs->wflag = 1;
shimniok	0:826c6171fc1b	2977	res = sync(dj.fs);
shimniok	0:826c6171fc1b	2978	}
shimniok	0:826c6171fc1b	2979	}
shimniok	0:826c6171fc1b	2980	}
shimniok	0:826c6171fc1b	2981
shimniok	0:826c6171fc1b	2982	LEAVE_FF(dj.fs, res);
shimniok	0:826c6171fc1b	2983	}
shimniok	0:826c6171fc1b	2984
shimniok	0:826c6171fc1b	2985
shimniok	0:826c6171fc1b	2986
shimniok	0:826c6171fc1b	2987
shimniok	0:826c6171fc1b	2988	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2989	/* Rename File/Directory */
shimniok	0:826c6171fc1b	2990	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	2991
shimniok	0:826c6171fc1b	2992	FRESULT f_rename (
shimniok	0:826c6171fc1b	2993	const TCHAR path_old, / Pointer to the old name */
shimniok	0:826c6171fc1b	2994	const TCHAR path_new / Pointer to the new name */
shimniok	0:826c6171fc1b	2995	)
shimniok	0:826c6171fc1b	2996	{
shimniok	0:826c6171fc1b	2997	FRESULT res;
shimniok	0:826c6171fc1b	2998	FAT_DIR djo, djn;
shimniok	0:826c6171fc1b	2999	BYTE buf[21], *dir;
shimniok	0:826c6171fc1b	3000	DWORD dw;
shimniok	0:826c6171fc1b	3001	DEF_NAMEBUF;
shimniok	0:826c6171fc1b	3002
shimniok	0:826c6171fc1b	3003
shimniok	0:826c6171fc1b	3004	res = chk_mounted(&path_old, &djo.fs, 1);
shimniok	0:826c6171fc1b	3005	if (res == FR_OK) {
shimniok	0:826c6171fc1b	3006	djn.fs = djo.fs;
shimniok	0:826c6171fc1b	3007	INIT_BUF(djo);
shimniok	0:826c6171fc1b	3008	res = follow_path(&djo, path_old); /* Check old object */
shimniok	0:826c6171fc1b	3009	if (_FS_RPATH && res == FR_OK && (djo.fn[NS] & NS_DOT))
shimniok	0:826c6171fc1b	3010	res = FR_INVALID_NAME;
shimniok	0:826c6171fc1b	3011	#if _FS_SHARE
shimniok	0:826c6171fc1b	3012	if (res == FR_OK) res = chk_lock(&djo, 2);
shimniok	0:826c6171fc1b	3013	#endif
shimniok	0:826c6171fc1b	3014	if (res == FR_OK) { /* Old object is found */
shimniok	0:826c6171fc1b	3015	if (!djo.dir) { /* Is root dir? */
shimniok	0:826c6171fc1b	3016	res = FR_NO_FILE;
shimniok	0:826c6171fc1b	3017	} else {
shimniok	0:826c6171fc1b	3018	mem_cpy(buf, djo.dir+DIR_Attr, 21); /* Save the object information except for name */
shimniok	0:826c6171fc1b	3019	mem_cpy(&djn, &djo, sizeof(FAT_DIR)); /* Check new object */
shimniok	0:826c6171fc1b	3020	res = follow_path(&djn, path_new);
shimniok	0:826c6171fc1b	3021	if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
shimniok	0:826c6171fc1b	3022	if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
shimniok	0:826c6171fc1b	3023	/* Start critical section that any interruption or error can cause cross-link */
shimniok	0:826c6171fc1b	3024	res = dir_register(&djn); /* Register the new entry */
shimniok	0:826c6171fc1b	3025	if (res == FR_OK) {
shimniok	0:826c6171fc1b	3026	dir = djn.dir; /* Copy object information except for name */
shimniok	0:826c6171fc1b	3027	mem_cpy(dir+13, buf+2, 19);
shimniok	0:826c6171fc1b	3028	dir[DIR_Attr] = buf[0] \| AM_ARC;
shimniok	0:826c6171fc1b	3029	djo.fs->wflag = 1;
shimniok	0:826c6171fc1b	3030	if (djo.sclust != djn.sclust && (dir[DIR_Attr] & AM_DIR)) { /* Update .. entry in the directory if needed */
shimniok	0:826c6171fc1b	3031	dw = clust2sect(djn.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) \| LD_WORD(dir+DIR_FstClusLO));
shimniok	0:826c6171fc1b	3032	if (!dw) {
shimniok	0:826c6171fc1b	3033	res = FR_INT_ERR;
shimniok	0:826c6171fc1b	3034	} else {
shimniok	0:826c6171fc1b	3035	res = move_window(djn.fs, dw);
shimniok	0:826c6171fc1b	3036	dir = djn.fs->win+32; /* .. entry */
shimniok	0:826c6171fc1b	3037	if (res == FR_OK && dir[1] == '.') {
shimniok	0:826c6171fc1b	3038	dw = (djn.fs->fs_type == FS_FAT32 && djn.sclust == djn.fs->dirbase) ? 0 : djn.sclust;
shimniok	0:826c6171fc1b	3039	ST_WORD(dir+DIR_FstClusLO, dw);
shimniok	0:826c6171fc1b	3040	ST_WORD(dir+DIR_FstClusHI, dw >> 16);
shimniok	0:826c6171fc1b	3041	djn.fs->wflag = 1;
shimniok	0:826c6171fc1b	3042	}
shimniok	0:826c6171fc1b	3043	}
shimniok	0:826c6171fc1b	3044	}
shimniok	0:826c6171fc1b	3045	if (res == FR_OK) {
shimniok	0:826c6171fc1b	3046	res = dir_remove(&djo); /* Remove old entry */
shimniok	0:826c6171fc1b	3047	if (res == FR_OK)
shimniok	0:826c6171fc1b	3048	res = sync(djo.fs);
shimniok	0:826c6171fc1b	3049	}
shimniok	0:826c6171fc1b	3050	}
shimniok	0:826c6171fc1b	3051	/* End critical section */
shimniok	0:826c6171fc1b	3052	}
shimniok	0:826c6171fc1b	3053	}
shimniok	0:826c6171fc1b	3054	}
shimniok	0:826c6171fc1b	3055	FREE_BUF();
shimniok	0:826c6171fc1b	3056	}
shimniok	0:826c6171fc1b	3057	LEAVE_FF(djo.fs, res);
shimniok	0:826c6171fc1b	3058	}
shimniok	0:826c6171fc1b	3059
shimniok	0:826c6171fc1b	3060	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	3061	#endif /* _FS_MINIMIZE == 0 */
shimniok	0:826c6171fc1b	3062	#endif /* _FS_MINIMIZE <= 1 */
shimniok	0:826c6171fc1b	3063	#endif /* _FS_MINIMIZE <= 2 */
shimniok	0:826c6171fc1b	3064
shimniok	0:826c6171fc1b	3065
shimniok	0:826c6171fc1b	3066
shimniok	0:826c6171fc1b	3067	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3068	/* Forward data to the stream directly (available on only tiny cfg) */
shimniok	0:826c6171fc1b	3069	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3070	#if _USE_FORWARD && _FS_TINY
shimniok	0:826c6171fc1b	3071
shimniok	0:826c6171fc1b	3072	FRESULT f_forward (
shimniok	0:826c6171fc1b	3073	FAT_FIL fp, / Pointer to the file object */
shimniok	0:826c6171fc1b	3074	UINT (func)(const BYTE,UINT), /* Pointer to the streaming function */
shimniok	0:826c6171fc1b	3075	UINT btr, /* Number of bytes to forward */
shimniok	0:826c6171fc1b	3076	UINT bf / Pointer to number of bytes forwarded */
shimniok	0:826c6171fc1b	3077	)
shimniok	0:826c6171fc1b	3078	{
shimniok	0:826c6171fc1b	3079	FRESULT res;
shimniok	0:826c6171fc1b	3080	DWORD remain, clst, sect;
shimniok	0:826c6171fc1b	3081	UINT rcnt;
shimniok	0:826c6171fc1b	3082	BYTE csect;
shimniok	0:826c6171fc1b	3083
shimniok	0:826c6171fc1b	3084
shimniok	0:826c6171fc1b	3085	bf = 0; / Initialize byte counter */
shimniok	0:826c6171fc1b	3086
shimniok	0:826c6171fc1b	3087	res = validate(fp->fs, fp->id); /* Check validity of the object */
shimniok	0:826c6171fc1b	3088	if (res != FR_OK) LEAVE_FF(fp->fs, res);
shimniok	0:826c6171fc1b	3089	if (fp->flag & FA__ERROR) /* Check error flag */
shimniok	0:826c6171fc1b	3090	LEAVE_FF(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	3091	if (!(fp->flag & FA_READ)) /* Check access mode */
shimniok	0:826c6171fc1b	3092	LEAVE_FF(fp->fs, FR_DENIED);
shimniok	0:826c6171fc1b	3093
shimniok	0:826c6171fc1b	3094	remain = fp->fsize - fp->fptr;
shimniok	0:826c6171fc1b	3095	if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
shimniok	0:826c6171fc1b	3096
shimniok	0:826c6171fc1b	3097	for ( ; btr && (func)(0, 0); / Repeat until all data transferred or stream becomes busy */
shimniok	0:826c6171fc1b	3098	fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
shimniok	0:826c6171fc1b	3099	csect = (BYTE)(fp->fptr / SS(fp->fs) & (fp->fs->csize - 1)); /* Sector offset in the cluster */
shimniok	0:826c6171fc1b	3100	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
shimniok	0:826c6171fc1b	3101	if (!csect) { /* On the cluster boundary? */
shimniok	0:826c6171fc1b	3102	clst = (fp->fptr == 0) ? /* On the top of the file? */
shimniok	0:826c6171fc1b	3103	fp->org_clust : get_fat(fp->fs, fp->curr_clust);
shimniok	0:826c6171fc1b	3104	if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	3105	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	3106	fp->curr_clust = clst; /* Update current cluster */
shimniok	0:826c6171fc1b	3107	}
shimniok	0:826c6171fc1b	3108	}
shimniok	0:826c6171fc1b	3109	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
shimniok	0:826c6171fc1b	3110	if (!sect) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	3111	sect += csect;
shimniok	0:826c6171fc1b	3112	if (move_window(fp->fs, sect)) /* Move sector window */
shimniok	0:826c6171fc1b	3113	ABORT(fp->fs, FR_DISK_ERR);
shimniok	0:826c6171fc1b	3114	fp->dsect = sect;
shimniok	0:826c6171fc1b	3115	rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
shimniok	0:826c6171fc1b	3116	if (rcnt > btr) rcnt = btr;
shimniok	0:826c6171fc1b	3117	rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
shimniok	0:826c6171fc1b	3118	if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
shimniok	0:826c6171fc1b	3119	}
shimniok	0:826c6171fc1b	3120
shimniok	0:826c6171fc1b	3121	LEAVE_FF(fp->fs, FR_OK);
shimniok	0:826c6171fc1b	3122	}
shimniok	0:826c6171fc1b	3123	#endif /* _USE_FORWARD */
shimniok	0:826c6171fc1b	3124
shimniok	0:826c6171fc1b	3125
shimniok	0:826c6171fc1b	3126
shimniok	0:826c6171fc1b	3127	#if _USE_MKFS && !_FS_READONLY
shimniok	0:826c6171fc1b	3128	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3129	/* Create File System on the Drive */
shimniok	0:826c6171fc1b	3130	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3131	#define N_ROOTDIR 512 /* Multiple of 32 */
shimniok	0:826c6171fc1b	3132	#define N_FATS 1 /* 1 or 2 */
shimniok	0:826c6171fc1b	3133
shimniok	0:826c6171fc1b	3134
shimniok	0:826c6171fc1b	3135	FRESULT f_mkfs (
shimniok	0:826c6171fc1b	3136	BYTE drv, /* Logical drive number */
shimniok	0:826c6171fc1b	3137	BYTE sfd, /* Partitioning rule 0:FDISK, 1:SFD */
shimniok	0:826c6171fc1b	3138	UINT au /* Allocation unit size [bytes] */
shimniok	0:826c6171fc1b	3139	)
shimniok	0:826c6171fc1b	3140	{
shimniok	0:826c6171fc1b	3141	static const WORD vst[] = { 1024, 512, 256, 128, 64, 32, 16, 8, 4, 2, 0};
shimniok	0:826c6171fc1b	3142	static const WORD cst[] = {32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512};
shimniok	0:826c6171fc1b	3143	BYTE fmt, md, *tbl;
shimniok	0:826c6171fc1b	3144	DWORD n_clst, vs, n;
shimniok	0:826c6171fc1b	3145	UINT as, i;
shimniok	0:826c6171fc1b	3146	DWORD b_vol, b_fat, b_dir, b_data; /* Area offset (LBA) */
shimniok	0:826c6171fc1b	3147	DWORD n_vol, n_rsv, n_fat, n_dir; /* Area size */
shimniok	0:826c6171fc1b	3148	FATFS *fs;
shimniok	0:826c6171fc1b	3149	DSTATUS stat;
shimniok	0:826c6171fc1b	3150
shimniok	0:826c6171fc1b	3151
shimniok	0:826c6171fc1b	3152	/* Check mounted drive and clear work area */
shimniok	0:826c6171fc1b	3153	if (drv >= _DRIVES) return FR_INVALID_DRIVE;
shimniok	0:826c6171fc1b	3154	fs = FatFs[drv];
shimniok	0:826c6171fc1b	3155	if (!fs) return FR_NOT_ENABLED;
shimniok	0:826c6171fc1b	3156	fs->fs_type = 0;
shimniok	0:826c6171fc1b	3157	drv = LD2PD(drv);
shimniok	0:826c6171fc1b	3158
shimniok	0:826c6171fc1b	3159	/* Get disk statics */
shimniok	0:826c6171fc1b	3160	stat = disk_initialize(drv);
shimniok	0:826c6171fc1b	3161	if (stat & STA_NOINIT) return FR_NOT_READY;
shimniok	0:826c6171fc1b	3162	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
shimniok	0:826c6171fc1b	3163	#if _MAX_SS != 512 /* Get disk sector size */
shimniok	0:826c6171fc1b	3164	if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK \|\| SS(fs) > _MAX_SS)
shimniok	0:826c6171fc1b	3165	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3166	#endif
shimniok	0:826c6171fc1b	3167	if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_vol) != RES_OK \|\| n_vol < 128)
shimniok	0:826c6171fc1b	3168	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3169	b_vol = (sfd == 1) ? 0 : 63; /* Volume start sector */
shimniok	0:826c6171fc1b	3170	n_vol -= b_vol;
shimniok	0:826c6171fc1b	3171	if (au & (au - 1)) au = 0; /* Check validity of the allocation unit size */
shimniok	0:826c6171fc1b	3172	if (!au) { /* AU auto selection */
shimniok	0:826c6171fc1b	3173	vs = n_vol / (2000 / (SS(fs) / 512));
shimniok	0:826c6171fc1b	3174	for (i = 0; vs < vst[i]; i++) ;
shimniok	0:826c6171fc1b	3175	au = cst[i];
shimniok	0:826c6171fc1b	3176	}
shimniok	0:826c6171fc1b	3177	if (_MAX_SS != 512 && au < SS(fs)) au = SS(fs);
shimniok	0:826c6171fc1b	3178	au /= SS(fs); /* Number of sectors per cluster */
shimniok	0:826c6171fc1b	3179	if (au == 0) au = 1;
shimniok	0:826c6171fc1b	3180	if (au > 128) au = 128;
shimniok	0:826c6171fc1b	3181
shimniok	0:826c6171fc1b	3182	/* Pre-compute number of clusters and FAT syb-type */
shimniok	0:826c6171fc1b	3183	n_clst = n_vol / au;
shimniok	0:826c6171fc1b	3184	fmt = FS_FAT12;
shimniok	0:826c6171fc1b	3185	if (n_clst >= MIN_FAT16) fmt = FS_FAT16;
shimniok	0:826c6171fc1b	3186	if (n_clst >= MIN_FAT32) fmt = FS_FAT32;
shimniok	0:826c6171fc1b	3187
shimniok	0:826c6171fc1b	3188	/* Determine offset and size of FAT structure */
shimniok	0:826c6171fc1b	3189	if (fmt == FS_FAT32) {
shimniok	0:826c6171fc1b	3190	n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
shimniok	0:826c6171fc1b	3191	n_rsv = 32;
shimniok	0:826c6171fc1b	3192	n_dir = 0;
shimniok	0:826c6171fc1b	3193	} else {
shimniok	0:826c6171fc1b	3194	n_fat = (fmt == FS_FAT12) ? (n_clst * 3 + 1) / 2 + 3 : (n_clst * 2) + 4;
shimniok	0:826c6171fc1b	3195	n_fat = (n_fat + SS(fs) - 1) / SS(fs);
shimniok	0:826c6171fc1b	3196	n_rsv = 1;
shimniok	0:826c6171fc1b	3197	n_dir = N_ROOTDIR * 32UL / SS(fs);
shimniok	0:826c6171fc1b	3198	}
shimniok	0:826c6171fc1b	3199	b_fat = b_vol + n_rsv; /* FAT area start sector */
shimniok	0:826c6171fc1b	3200	b_dir = b_fat + n_fat * N_FATS; /* Directory area start sector */
shimniok	0:826c6171fc1b	3201	b_data = b_dir + n_dir; /* Data area start sector */
shimniok	0:826c6171fc1b	3202	if (n_vol < b_data + au) return FR_MKFS_ABORTED; /* Too small volume */
shimniok	0:826c6171fc1b	3203
shimniok	0:826c6171fc1b	3204	/* Align data start sector to erase block boundary (for flash memory media) */
shimniok	0:826c6171fc1b	3205	if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3206	if (!n \|\| n > 32768) return FR_MKFS_ABORTED;
shimniok	0:826c6171fc1b	3207	n = (b_data + n - 1) & ~(n - 1); /* Next nearest boundary from current data start */
shimniok	0:826c6171fc1b	3208	n = (n - b_data) / N_FATS;
shimniok	0:826c6171fc1b	3209	if (fmt == FS_FAT32) { /* FAT32: Move FAT start */
shimniok	0:826c6171fc1b	3210	n_rsv += n;
shimniok	0:826c6171fc1b	3211	b_fat += n;
shimniok	0:826c6171fc1b	3212	} else { /* FAT12/16: Expand FAT size */
shimniok	0:826c6171fc1b	3213	n_fat += n;
shimniok	0:826c6171fc1b	3214	}
shimniok	0:826c6171fc1b	3215	/* b_dir and b_data are no longer used below */
shimniok	0:826c6171fc1b	3216
shimniok	0:826c6171fc1b	3217	/* Determine number of cluster and final check of validity of the FAT sub-type */
shimniok	0:826c6171fc1b	3218	n_clst = (n_vol - n_rsv - n_fat * N_FATS - n_dir) / au;
shimniok	0:826c6171fc1b	3219	if ( (fmt == FS_FAT16 && n_clst < MIN_FAT16)
shimniok	0:826c6171fc1b	3220	\|\| (fmt == FS_FAT32 && n_clst < MIN_FAT32))
shimniok	0:826c6171fc1b	3221	return FR_MKFS_ABORTED;
shimniok	0:826c6171fc1b	3222
shimniok	0:826c6171fc1b	3223	/* Create partition table if required */
shimniok	0:826c6171fc1b	3224	if (sfd == 1) {
shimniok	0:826c6171fc1b	3225	md = 0xF0;
shimniok	0:826c6171fc1b	3226	} else {
shimniok	0:826c6171fc1b	3227	DWORD n_disk = b_vol + n_vol;
shimniok	0:826c6171fc1b	3228
shimniok	0:826c6171fc1b	3229	mem_set(fs->win, 0, SS(fs));
shimniok	0:826c6171fc1b	3230	tbl = fs->win+MBR_Table;
shimniok	0:826c6171fc1b	3231	ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
shimniok	0:826c6171fc1b	3232	if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
shimniok	0:826c6171fc1b	3233	n_disk = n_disk / 63 / 255;
shimniok	0:826c6171fc1b	3234	tbl[7] = (BYTE)n_disk;
shimniok	0:826c6171fc1b	3235	tbl[6] = (BYTE)((n_disk >> 2) \| 63);
shimniok	0:826c6171fc1b	3236	} else {
shimniok	0:826c6171fc1b	3237	ST_WORD(&tbl[6], 0xFFFF);
shimniok	0:826c6171fc1b	3238	}
shimniok	0:826c6171fc1b	3239	tbl[5] = 254;
shimniok	0:826c6171fc1b	3240	if (fmt != FS_FAT32) /* System ID */
shimniok	0:826c6171fc1b	3241	tbl[4] = (n_vol < 0x10000) ? 0x04 : 0x06;
shimniok	0:826c6171fc1b	3242	else
shimniok	0:826c6171fc1b	3243	tbl[4] = 0x0c;
shimniok	0:826c6171fc1b	3244	ST_DWORD(tbl+8, 63); /* Partition start in LBA */
shimniok	0:826c6171fc1b	3245	ST_DWORD(tbl+12, n_vol); /* Partition size in LBA */
shimniok	0:826c6171fc1b	3246	ST_WORD(tbl+64, 0xAA55); /* Signature */
shimniok	0:826c6171fc1b	3247	if (disk_write(drv, fs->win, 0, 1) != RES_OK)
shimniok	0:826c6171fc1b	3248	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3249	md = 0xF8;
shimniok	0:826c6171fc1b	3250	}
shimniok	0:826c6171fc1b	3251
shimniok	0:826c6171fc1b	3252	/* Create VBR */
shimniok	0:826c6171fc1b	3253	tbl = fs->win; /* Clear buffer */
shimniok	0:826c6171fc1b	3254	mem_set(tbl, 0, SS(fs));
shimniok	0:826c6171fc1b	3255	ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */
shimniok	0:826c6171fc1b	3256	as = SS(fs); /* Sector size */
shimniok	0:826c6171fc1b	3257	ST_WORD(tbl+BPB_BytsPerSec, as);
shimniok	0:826c6171fc1b	3258	tbl[BPB_SecPerClus] = (BYTE)au; /* Sectors per cluster */
shimniok	0:826c6171fc1b	3259	ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
shimniok	0:826c6171fc1b	3260	tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
shimniok	0:826c6171fc1b	3261	as = (fmt == FS_FAT32) ? 0 : N_ROOTDIR; /* Number of rootdir entries */
shimniok	0:826c6171fc1b	3262	ST_WORD(tbl+BPB_RootEntCnt, as);
shimniok	0:826c6171fc1b	3263	if (n_vol < 0x10000) { /* Number of total sectors */
shimniok	0:826c6171fc1b	3264	ST_WORD(tbl+BPB_TotSec16, n_vol);
shimniok	0:826c6171fc1b	3265	} else {
shimniok	0:826c6171fc1b	3266	ST_DWORD(tbl+BPB_TotSec32, n_vol);
shimniok	0:826c6171fc1b	3267	}
shimniok	0:826c6171fc1b	3268	tbl[BPB_Media] = md; /* Media descriptor */
shimniok	0:826c6171fc1b	3269	ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
shimniok	0:826c6171fc1b	3270	ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
shimniok	0:826c6171fc1b	3271	ST_DWORD(tbl+BPB_HiddSec, b_vol); /* Hidden sectors */
shimniok	0:826c6171fc1b	3272	n = get_fattime(); /* Use current time as VSN */
shimniok	0:826c6171fc1b	3273	if (fmt == FS_FAT32) {
shimniok	0:826c6171fc1b	3274	ST_DWORD(tbl+BS_VolID32, n); /* VSN */
shimniok	0:826c6171fc1b	3275	ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of sectors per FAT */
shimniok	0:826c6171fc1b	3276	ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory start cluster (2) */
shimniok	0:826c6171fc1b	3277	ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (VBR+1) */
shimniok	0:826c6171fc1b	3278	ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (VBR+6) */
shimniok	0:826c6171fc1b	3279	tbl[BS_DrvNum32] = 0x80; /* Drive number */
shimniok	0:826c6171fc1b	3280	tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
shimniok	0:826c6171fc1b	3281	mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume label, FAT signature */
shimniok	0:826c6171fc1b	3282	} else {
shimniok	0:826c6171fc1b	3283	ST_DWORD(tbl+BS_VolID, n); /* VSN */
shimniok	0:826c6171fc1b	3284	ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of sectors per FAT */
shimniok	0:826c6171fc1b	3285	tbl[BS_DrvNum] = 0x80; /* Drive number */
shimniok	0:826c6171fc1b	3286	tbl[BS_BootSig] = 0x29; /* Extended boot signature */
shimniok	0:826c6171fc1b	3287	mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume label, FAT signature */
shimniok	0:826c6171fc1b	3288	}
shimniok	0:826c6171fc1b	3289	ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature (Offset is fixed here regardless of sector size) */
shimniok	0:826c6171fc1b	3290	if (disk_write(drv, tbl, b_vol, 1) != RES_OK) /* Original (VBR) */
shimniok	0:826c6171fc1b	3291	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3292	if (fmt == FS_FAT32) /* Backup (VBR+6) */
shimniok	0:826c6171fc1b	3293	disk_write(drv, tbl, b_vol + 6, 1);
shimniok	0:826c6171fc1b	3294
shimniok	0:826c6171fc1b	3295	/* Initialize FAT area */
shimniok	0:826c6171fc1b	3296	for (i = 0; i < N_FATS; i++) {
shimniok	0:826c6171fc1b	3297	mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
shimniok	0:826c6171fc1b	3298	n = md; /* Media descriptor byte */
shimniok	0:826c6171fc1b	3299	if (fmt != FS_FAT32) {
shimniok	0:826c6171fc1b	3300	n \|= (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
shimniok	0:826c6171fc1b	3301	ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT12/16) */
shimniok	0:826c6171fc1b	3302	} else {
shimniok	0:826c6171fc1b	3303	n \|= 0x0FFFFF00;
shimniok	0:826c6171fc1b	3304	ST_DWORD(tbl+0, n); /* Reserve cluster #0-1 (FAT32) */
shimniok	0:826c6171fc1b	3305	ST_DWORD(tbl+4, 0x0FFFFFFF);
shimniok	0:826c6171fc1b	3306	ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
shimniok	0:826c6171fc1b	3307	}
shimniok	0:826c6171fc1b	3308	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
shimniok	0:826c6171fc1b	3309	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3310	mem_set(tbl, 0, SS(fs)); /* Fill following FAT entries with zero */
shimniok	0:826c6171fc1b	3311	for (n = 1; n < n_fat; n++) { /* This loop may take a time on FAT32 volume due to many single sector write */
shimniok	0:826c6171fc1b	3312	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
shimniok	0:826c6171fc1b	3313	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3314	}
shimniok	0:826c6171fc1b	3315	}
shimniok	0:826c6171fc1b	3316
shimniok	0:826c6171fc1b	3317	/* Initialize root directory */
shimniok	0:826c6171fc1b	3318	n = (fmt == FS_FAT32) ? as : n_dir;
shimniok	0:826c6171fc1b	3319	while (n--) {
shimniok	0:826c6171fc1b	3320	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
shimniok	0:826c6171fc1b	3321	return FR_DISK_ERR;
shimniok	0:826c6171fc1b	3322	}
shimniok	0:826c6171fc1b	3323
shimniok	0:826c6171fc1b	3324	/* Create FSInfo record if needed */
shimniok	0:826c6171fc1b	3325	if (fmt == FS_FAT32) {
shimniok	0:826c6171fc1b	3326	ST_WORD(tbl+BS_55AA, 0xAA55);
shimniok	0:826c6171fc1b	3327	ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
shimniok	0:826c6171fc1b	3328	ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
shimniok	0:826c6171fc1b	3329	ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
shimniok	0:826c6171fc1b	3330	ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
shimniok	0:826c6171fc1b	3331	disk_write(drv, tbl, b_vol + 1, 1); /* Original (VBR+1) */
shimniok	0:826c6171fc1b	3332	disk_write(drv, tbl, b_vol + 7, 1); /* Backup (VBR+7) */
shimniok	0:826c6171fc1b	3333	}
shimniok	0:826c6171fc1b	3334
shimniok	0:826c6171fc1b	3335	return (disk_ioctl(drv, CTRL_SYNC, (void*)0) == RES_OK) ? FR_OK : FR_DISK_ERR;
shimniok	0:826c6171fc1b	3336	}
shimniok	0:826c6171fc1b	3337
shimniok	0:826c6171fc1b	3338	#endif /* _USE_MKFS && !_FS_READONLY */
shimniok	0:826c6171fc1b	3339
shimniok	0:826c6171fc1b	3340
shimniok	0:826c6171fc1b	3341
shimniok	0:826c6171fc1b	3342
shimniok	0:826c6171fc1b	3343	#if _USE_STRFUNC
shimniok	0:826c6171fc1b	3344	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3345	/* Get a string from the file */
shimniok	0:826c6171fc1b	3346	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3347	TCHAR* f_gets (
shimniok	0:826c6171fc1b	3348	TCHAR* buff, /* Pointer to the string buffer to read */
shimniok	0:826c6171fc1b	3349	int len, /* Size of string buffer (characters) */
shimniok	0:826c6171fc1b	3350	FAT_FIL* fil /* Pointer to the file object */
shimniok	0:826c6171fc1b	3351	)
shimniok	0:826c6171fc1b	3352	{
shimniok	0:826c6171fc1b	3353	int n = 0;
shimniok	0:826c6171fc1b	3354	TCHAR c, *p = buff;
shimniok	0:826c6171fc1b	3355	BYTE s[2];
shimniok	0:826c6171fc1b	3356	UINT rc;
shimniok	0:826c6171fc1b	3357
shimniok	0:826c6171fc1b	3358
shimniok	0:826c6171fc1b	3359	while (n < len - 1) { /* Read bytes until buffer gets filled */
shimniok	0:826c6171fc1b	3360	f_read(fil, s, 1, &rc);
shimniok	0:826c6171fc1b	3361	if (rc != 1) break; /* Break on EOF or error */
shimniok	0:826c6171fc1b	3362	c = s[0];
shimniok	0:826c6171fc1b	3363	#if _LFN_UNICODE /* Read a character in UTF-8 encoding */
shimniok	0:826c6171fc1b	3364	if (c >= 0x80) {
shimniok	0:826c6171fc1b	3365	if (c < 0xC0) continue; /* Skip stray trailer */
shimniok	0:826c6171fc1b	3366	if (c < 0xE0) { /* Two-byte sequense */
shimniok	0:826c6171fc1b	3367	f_read(fil, s, 1, &rc);
shimniok	0:826c6171fc1b	3368	if (rc != 1) break;
shimniok	0:826c6171fc1b	3369	c = ((c & 0x1F) << 6) \| (s[0] & 0x3F);
shimniok	0:826c6171fc1b	3370	if (c < 0x80) c = '?';
shimniok	0:826c6171fc1b	3371	} else {
shimniok	0:826c6171fc1b	3372	if (c < 0xF0) { /* Three-byte sequense */
shimniok	0:826c6171fc1b	3373	f_read(fil, s, 2, &rc);
shimniok	0:826c6171fc1b	3374	if (rc != 2) break;
shimniok	0:826c6171fc1b	3375	c = (c << 12) \| ((s[0] & 0x3F) << 6) \| (s[1] & 0x3F);
shimniok	0:826c6171fc1b	3376	if (c < 0x800) c = '?';
shimniok	0:826c6171fc1b	3377	} else { /* Reject four-byte sequense */
shimniok	0:826c6171fc1b	3378	c = '?';
shimniok	0:826c6171fc1b	3379	}
shimniok	0:826c6171fc1b	3380	}
shimniok	0:826c6171fc1b	3381	}
shimniok	0:826c6171fc1b	3382	#endif
shimniok	0:826c6171fc1b	3383	#if _USE_STRFUNC >= 2
shimniok	0:826c6171fc1b	3384	if (c == '\r') continue; /* Strip '\r' */
shimniok	0:826c6171fc1b	3385	#endif
shimniok	0:826c6171fc1b	3386	*p++ = c;
shimniok	0:826c6171fc1b	3387	n++;
shimniok	0:826c6171fc1b	3388	if (c == '\n') break; /* Break on EOL */
shimniok	0:826c6171fc1b	3389	}
shimniok	0:826c6171fc1b	3390	*p = 0;
shimniok	0:826c6171fc1b	3391	return n ? buff : 0; /* When no data read (eof or error), return with error. */
shimniok	0:826c6171fc1b	3392	}
shimniok	0:826c6171fc1b	3393
shimniok	0:826c6171fc1b	3394
shimniok	0:826c6171fc1b	3395
shimniok	0:826c6171fc1b	3396	#if !_FS_READONLY
shimniok	0:826c6171fc1b	3397	#include <stdarg.h>
shimniok	0:826c6171fc1b	3398	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3399	/* Put a character to the file */
shimniok	0:826c6171fc1b	3400	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3401	int f_putc (
shimniok	0:826c6171fc1b	3402	TCHAR c, /* A character to be output */
shimniok	0:826c6171fc1b	3403	FAT_FIL* fil /* Pointer to the file object */
shimniok	0:826c6171fc1b	3404	)
shimniok	0:826c6171fc1b	3405	{
shimniok	0:826c6171fc1b	3406	UINT bw, btw;
shimniok	0:826c6171fc1b	3407	BYTE s[3];
shimniok	0:826c6171fc1b	3408
shimniok	0:826c6171fc1b	3409
shimniok	0:826c6171fc1b	3410	#if _USE_STRFUNC >= 2
shimniok	0:826c6171fc1b	3411	if (c == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
shimniok	0:826c6171fc1b	3412	#endif
shimniok	0:826c6171fc1b	3413
shimniok	0:826c6171fc1b	3414	#if _LFN_UNICODE /* Write the character in UTF-8 encoding */
shimniok	0:826c6171fc1b	3415	if (c < 0x80) { /* 7-bit */
shimniok	0:826c6171fc1b	3416	s[0] = (BYTE)c;
shimniok	0:826c6171fc1b	3417	btw = 1;
shimniok	0:826c6171fc1b	3418	} else {
shimniok	0:826c6171fc1b	3419	if (c < 0x800) { /* 11-bit */
shimniok	0:826c6171fc1b	3420	s[0] = (BYTE)(0xC0 \| (c >> 6));
shimniok	0:826c6171fc1b	3421	s[1] = (BYTE)(0x80 \| (c & 0x3F));
shimniok	0:826c6171fc1b	3422	btw = 2;
shimniok	0:826c6171fc1b	3423	} else { /* 16-bit */
shimniok	0:826c6171fc1b	3424	s[0] = (BYTE)(0xE0 \| (c >> 12));
shimniok	0:826c6171fc1b	3425	s[1] = (BYTE)(0x80 \| ((c >> 6) & 0x3F));
shimniok	0:826c6171fc1b	3426	s[2] = (BYTE)(0x80 \| (c & 0x3F));
shimniok	0:826c6171fc1b	3427	btw = 3;
shimniok	0:826c6171fc1b	3428	}
shimniok	0:826c6171fc1b	3429	}
shimniok	0:826c6171fc1b	3430	#else /* Write the character without conversion */
shimniok	0:826c6171fc1b	3431	s[0] = (BYTE)c;
shimniok	0:826c6171fc1b	3432	btw = 1;
shimniok	0:826c6171fc1b	3433	#endif
shimniok	0:826c6171fc1b	3434	f_write(fil, s, btw, &bw); /* Write the char to the file */
shimniok	0:826c6171fc1b	3435	return (bw == btw) ? 1 : EOF; /* Return the result */
shimniok	0:826c6171fc1b	3436	}
shimniok	0:826c6171fc1b	3437
shimniok	0:826c6171fc1b	3438
shimniok	0:826c6171fc1b	3439
shimniok	0:826c6171fc1b	3440
shimniok	0:826c6171fc1b	3441	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3442	/* Put a string to the file */
shimniok	0:826c6171fc1b	3443	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3444	int f_puts (
shimniok	0:826c6171fc1b	3445	const TCHAR* str, /* Pointer to the string to be output */
shimniok	0:826c6171fc1b	3446	FAT_FIL* fil /* Pointer to the file object */
shimniok	0:826c6171fc1b	3447	)
shimniok	0:826c6171fc1b	3448	{
shimniok	0:826c6171fc1b	3449	int n;
shimniok	0:826c6171fc1b	3450
shimniok	0:826c6171fc1b	3451
shimniok	0:826c6171fc1b	3452	for (n = 0; *str; str++, n++) {
shimniok	0:826c6171fc1b	3453	if (f_putc(*str, fil) == EOF) return EOF;
shimniok	0:826c6171fc1b	3454	}
shimniok	0:826c6171fc1b	3455	return n;
shimniok	0:826c6171fc1b	3456	}
shimniok	0:826c6171fc1b	3457
shimniok	0:826c6171fc1b	3458
shimniok	0:826c6171fc1b	3459
shimniok	0:826c6171fc1b	3460
shimniok	0:826c6171fc1b	3461	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3462	/* Put a formatted string to the file */
shimniok	0:826c6171fc1b	3463	/-----------------------------------------------------------------------/
shimniok	0:826c6171fc1b	3464	int f_printf (
shimniok	0:826c6171fc1b	3465	FAT_FIL* fil, /* Pointer to the file object */
shimniok	0:826c6171fc1b	3466	const TCHAR* str, /* Pointer to the format string */
shimniok	0:826c6171fc1b	3467	... /* Optional arguments... */
shimniok	0:826c6171fc1b	3468	)
shimniok	0:826c6171fc1b	3469	{
shimniok	0:826c6171fc1b	3470	va_list arp;
shimniok	0:826c6171fc1b	3471	BYTE f, r;
shimniok	0:826c6171fc1b	3472	UINT i, w;
shimniok	0:826c6171fc1b	3473	ULONG val;
shimniok	0:826c6171fc1b	3474	TCHAR c, d, s[16];
shimniok	0:826c6171fc1b	3475	int res, cc;
shimniok	0:826c6171fc1b	3476
shimniok	0:826c6171fc1b	3477
shimniok	0:826c6171fc1b	3478	va_start(arp, str);
shimniok	0:826c6171fc1b	3479
shimniok	0:826c6171fc1b	3480	for (cc = res = 0; cc != EOF; res += cc) {
shimniok	0:826c6171fc1b	3481	c = *str++;
shimniok	0:826c6171fc1b	3482	if (c == 0) break; /* End of string */
shimniok	0:826c6171fc1b	3483	if (c != '%') { /* Non escape character */
shimniok	0:826c6171fc1b	3484	cc = f_putc(c, fil);
shimniok	0:826c6171fc1b	3485	if (cc != EOF) cc = 1;
shimniok	0:826c6171fc1b	3486	continue;
shimniok	0:826c6171fc1b	3487	}
shimniok	0:826c6171fc1b	3488	w = f = 0;
shimniok	0:826c6171fc1b	3489	c = *str++;
shimniok	0:826c6171fc1b	3490	if (c == '0') { /* Flag: '0' padding */
shimniok	0:826c6171fc1b	3491	f = 1; c = *str++;
shimniok	0:826c6171fc1b	3492	}
shimniok	0:826c6171fc1b	3493	while (IsDigit(c)) { /* Precision */
shimniok	0:826c6171fc1b	3494	w = w * 10 + c - '0';
shimniok	0:826c6171fc1b	3495	c = *str++;
shimniok	0:826c6171fc1b	3496	}
shimniok	0:826c6171fc1b	3497	if (c == 'l' \|\| c == 'L') { /* Prefix: Size is long int */
shimniok	0:826c6171fc1b	3498	f \|= 2; c = *str++;
shimniok	0:826c6171fc1b	3499	}
shimniok	0:826c6171fc1b	3500	if (!c) break;
shimniok	0:826c6171fc1b	3501	d = c;
shimniok	0:826c6171fc1b	3502	if (IsLower(d)) d -= 0x20;
shimniok	0:826c6171fc1b	3503	switch (d) { /* Type is... */
shimniok	0:826c6171fc1b	3504	case 'S' : /* String */
shimniok	0:826c6171fc1b	3505	cc = f_puts(va_arg(arp, TCHAR*), fil); continue;
shimniok	0:826c6171fc1b	3506	case 'C' : /* Character */
shimniok	0:826c6171fc1b	3507	cc = f_putc((TCHAR)va_arg(arp, int), fil); continue;
shimniok	0:826c6171fc1b	3508	case 'B' : /* Binary */
shimniok	0:826c6171fc1b	3509	r = 2; break;
shimniok	0:826c6171fc1b	3510	case 'O' : /* Octal */
shimniok	0:826c6171fc1b	3511	r = 8; break;
shimniok	0:826c6171fc1b	3512	case 'D' : /* Signed decimal */
shimniok	0:826c6171fc1b	3513	case 'U' : /* Unsigned decimal */
shimniok	0:826c6171fc1b	3514	r = 10; break;
shimniok	0:826c6171fc1b	3515	case 'X' : /* Hexdecimal */
shimniok	0:826c6171fc1b	3516	r = 16; break;
shimniok	0:826c6171fc1b	3517	default: /* Unknown */
shimniok	0:826c6171fc1b	3518	cc = f_putc(c, fil); continue;
shimniok	0:826c6171fc1b	3519	}
shimniok	0:826c6171fc1b	3520
shimniok	0:826c6171fc1b	3521	/* Get an argument */
shimniok	0:826c6171fc1b	3522	val = (f & 2) ? va_arg(arp, long) : ((d == 'D') ? (long)va_arg(arp, int) : va_arg(arp, unsigned int));
shimniok	0:826c6171fc1b	3523	if (d == 'D' && (val & 0x80000000)) {
shimniok	0:826c6171fc1b	3524	val = 0 - val;
shimniok	0:826c6171fc1b	3525	f \|= 4;
shimniok	0:826c6171fc1b	3526	}
shimniok	0:826c6171fc1b	3527	/* Put it in numeral string */
shimniok	0:826c6171fc1b	3528	i = 0;
shimniok	0:826c6171fc1b	3529	do {
shimniok	0:826c6171fc1b	3530	d = (TCHAR)(val % r); val /= r;
shimniok	0:826c6171fc1b	3531	if (d > 9) {
shimniok	0:826c6171fc1b	3532	d += 7;
shimniok	0:826c6171fc1b	3533	if (c == 'x') d += 0x20;
shimniok	0:826c6171fc1b	3534	}
shimniok	0:826c6171fc1b	3535	s[i++] = d + '0';
shimniok	0:826c6171fc1b	3536	} while (val && i < sizeof(s) / sizeof(s[0]));
shimniok	0:826c6171fc1b	3537	if (f & 4) s[i++] = '-';
shimniok	0:826c6171fc1b	3538	cc = 0;
shimniok	0:826c6171fc1b	3539	while (i < w-- && cc != EOF) {
shimniok	0:826c6171fc1b	3540	cc = f_putc((TCHAR)((f & 1) ? '0' : ' '), fil);
shimniok	0:826c6171fc1b	3541	res++;
shimniok	0:826c6171fc1b	3542	}
shimniok	0:826c6171fc1b	3543	do {
shimniok	0:826c6171fc1b	3544	cc = f_putc(s[--i], fil);
shimniok	0:826c6171fc1b	3545	res++;
shimniok	0:826c6171fc1b	3546	} while (i && cc != EOF);
shimniok	0:826c6171fc1b	3547	if (cc != EOF) cc = 0;
shimniok	0:826c6171fc1b	3548	}
shimniok	0:826c6171fc1b	3549
shimniok	0:826c6171fc1b	3550	va_end(arp);
shimniok	0:826c6171fc1b	3551	return (cc == EOF) ? cc : res;
shimniok	0:826c6171fc1b	3552	}
shimniok	0:826c6171fc1b	3553
shimniok	0:826c6171fc1b	3554	#endif /* !_FS_READONLY */
shimniok	0:826c6171fc1b	3555	#endif /* _USE_STRFUNC */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	17 Jun 2012
Imports:	80
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	8
Followers:	6

SDFileSystem/FATFileSystem/Core/ff.c@0:826c6171fc1b, 2012-06-20 (annotated)

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