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Code/chan_fat_fs/ff.c@0:085749c8446f, 2012-06-13 (annotated)

Committer:: emh203
Date:: Wed Jun 13 15:10:06 2012 +0000
Revision:: 0:085749c8446f

Who changed what in which revision?

User	Revision	Line number	New contents of line
emh203	0:085749c8446f	1	/*----------------------------------------------------------------------------/
emh203	0:085749c8446f	2	/ FatFs - FAT file system module R0.07e (C)ChaN, 2009
emh203	0:085749c8446f	3	/-----------------------------------------------------------------------------/
emh203	0:085749c8446f	4	/ FatFs module is a generic FAT file system module for small embedded systems.
emh203	0:085749c8446f	5	/ This is a free software that opened for education, research and commercial
emh203	0:085749c8446f	6	/ developments under license policy of following trems.
emh203	0:085749c8446f	7	/
emh203	0:085749c8446f	8	/ Copyright (C) 2009, ChaN, all right reserved.
emh203	0:085749c8446f	9	/
emh203	0:085749c8446f	10	/ * The FatFs module is a free software and there is NO WARRANTY.
emh203	0:085749c8446f	11	/ * No restriction on use. You can use, modify and redistribute it for
emh203	0:085749c8446f	12	/ personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
emh203	0:085749c8446f	13	/ * Redistributions of source code must retain the above copyright notice.
emh203	0:085749c8446f	14	/
emh203	0:085749c8446f	15	/-----------------------------------------------------------------------------/
emh203	0:085749c8446f	16	/ Feb 26,'06 R0.00 Prototype.
emh203	0:085749c8446f	17	/
emh203	0:085749c8446f	18	/ Apr 29,'06 R0.01 First stable version.
emh203	0:085749c8446f	19	/
emh203	0:085749c8446f	20	/ Jun 01,'06 R0.02 Added FAT12 support.
emh203	0:085749c8446f	21	/ Removed unbuffered mode.
emh203	0:085749c8446f	22	/ Fixed a problem on small (<32M) patition.
emh203	0:085749c8446f	23	/ Jun 10,'06 R0.02a Added a configuration option (_FS_MINIMUM).
emh203	0:085749c8446f	24	/
emh203	0:085749c8446f	25	/ Sep 22,'06 R0.03 Added f_rename().
emh203	0:085749c8446f	26	/ Changed option _FS_MINIMUM to _FS_MINIMIZE.
emh203	0:085749c8446f	27	/ Dec 11,'06 R0.03a Improved cluster scan algolithm to write files fast.
emh203	0:085749c8446f	28	/ Fixed f_mkdir() creates incorrect directory on FAT32.
emh203	0:085749c8446f	29	/
emh203	0:085749c8446f	30	/ Feb 04,'07 R0.04 Supported multiple drive system.
emh203	0:085749c8446f	31	/ Changed some interfaces for multiple drive system.
emh203	0:085749c8446f	32	/ Changed f_mountdrv() to f_mount().
emh203	0:085749c8446f	33	/ Added f_mkfs().
emh203	0:085749c8446f	34	/ Apr 01,'07 R0.04a Supported multiple partitions on a plysical drive.
emh203	0:085749c8446f	35	/ Added a capability of extending file size to f_lseek().
emh203	0:085749c8446f	36	/ Added minimization level 3.
emh203	0:085749c8446f	37	/ Fixed an endian sensitive code in f_mkfs().
emh203	0:085749c8446f	38	/ May 05,'07 R0.04b Added a configuration option _USE_NTFLAG.
emh203	0:085749c8446f	39	/ Added FSInfo support.
emh203	0:085749c8446f	40	/ Fixed DBCS name can result FR_INVALID_NAME.
emh203	0:085749c8446f	41	/ Fixed short seek (<= csize) collapses the file object.
emh203	0:085749c8446f	42	/
emh203	0:085749c8446f	43	/ Aug 25,'07 R0.05 Changed arguments of f_read(), f_write() and f_mkfs().
emh203	0:085749c8446f	44	/ Fixed f_mkfs() on FAT32 creates incorrect FSInfo.
emh203	0:085749c8446f	45	/ Fixed f_mkdir() on FAT32 creates incorrect directory.
emh203	0:085749c8446f	46	/ Feb 03,'08 R0.05a Added f_truncate() and f_utime().
emh203	0:085749c8446f	47	/ Fixed off by one error at FAT sub-type determination.
emh203	0:085749c8446f	48	/ Fixed btr in f_read() can be mistruncated.
emh203	0:085749c8446f	49	/ Fixed cached sector is not flushed when create and close
emh203	0:085749c8446f	50	/ without write.
emh203	0:085749c8446f	51	/
emh203	0:085749c8446f	52	/ Apr 01,'08 R0.06 Added fputc(), fputs(), fprintf() and fgets().
emh203	0:085749c8446f	53	/ Improved performance of f_lseek() on moving to the same
emh203	0:085749c8446f	54	/ or following cluster.
emh203	0:085749c8446f	55	/
emh203	0:085749c8446f	56	/ Apr 01,'09 R0.07 Merged Tiny-FatFs as a buffer configuration option.
emh203	0:085749c8446f	57	/ Added long file name support.
emh203	0:085749c8446f	58	/ Added multiple code page support.
emh203	0:085749c8446f	59	/ Added re-entrancy for multitask operation.
emh203	0:085749c8446f	60	/ Added auto cluster size selection to f_mkfs().
emh203	0:085749c8446f	61	/ Added rewind option to f_readdir().
emh203	0:085749c8446f	62	/ Changed result code of critical errors.
emh203	0:085749c8446f	63	/ Renamed string functions to avoid name collision.
emh203	0:085749c8446f	64	/ Apr 14,'09 R0.07a Separated out OS dependent code on reentrant cfg.
emh203	0:085749c8446f	65	/ Added multiple sector size support.
emh203	0:085749c8446f	66	/ Jun 21,'09 R0.07c Fixed f_unlink() can return FR_OK on error.
emh203	0:085749c8446f	67	/ Fixed wrong cache control in f_lseek().
emh203	0:085749c8446f	68	/ Added relative path feature.
emh203	0:085749c8446f	69	/ Added f_chdir() and f_chdrive().
emh203	0:085749c8446f	70	/ Added proper case conversion to extended char.
emh203	0:085749c8446f	71	/ Nov 03,'09 R0.07e Separated out configuration options from ff.h to ffconf.h.
emh203	0:085749c8446f	72	/ Fixed f_unlink() fails to remove a sub-dir on _FS_RPATH.
emh203	0:085749c8446f	73	/ Fixed name matching error on the 13 char boundary.
emh203	0:085749c8446f	74	/ Added a configuration option, _LFN_UNICODE.
emh203	0:085749c8446f	75	/ Changed f_readdir() to return the SFN with always upper
emh203	0:085749c8446f	76	/ case on non-LFN cfg.
emh203	0:085749c8446f	77	/---------------------------------------------------------------------------*/
emh203	0:085749c8446f	78
emh203	0:085749c8446f	79	#include "ff.h" /* FatFs configurations and declarations */
emh203	0:085749c8446f	80	#include "diskio.h" /* Declarations of low level disk I/O functions */
emh203	0:085749c8446f	81
emh203	0:085749c8446f	82	/*--------------------------------------------------------------------------
emh203	0:085749c8446f	83
emh203	0:085749c8446f	84	Module Private Definitions
emh203	0:085749c8446f	85
emh203	0:085749c8446f	86	---------------------------------------------------------------------------*/
emh203	0:085749c8446f	87
emh203	0:085749c8446f	88	#if _FATFS != 0x007E
emh203	0:085749c8446f	89	#error Wrong include file (ff.h).
emh203	0:085749c8446f	90	#endif
emh203	0:085749c8446f	91
emh203	0:085749c8446f	92	#if _FS_REENTRANT
emh203	0:085749c8446f	93	#if _USE_LFN == 1
emh203	0:085749c8446f	94	#error Static LFN work area must not be used in re-entrant configuration.
emh203	0:085749c8446f	95	#endif
emh203	0:085749c8446f	96	#define ENTER_FF(fs) { if (!lock_fs(fs)) return FR_TIMEOUT; }
emh203	0:085749c8446f	97	#define LEAVE_FF(fs, res) { unlock_fs(fs, res); return res; }
emh203	0:085749c8446f	98
emh203	0:085749c8446f	99	#else
emh203	0:085749c8446f	100	#define ENTER_FF(fs)
emh203	0:085749c8446f	101	#define LEAVE_FF(fs, res) return res
emh203	0:085749c8446f	102
emh203	0:085749c8446f	103	#endif
emh203	0:085749c8446f	104
emh203	0:085749c8446f	105	#define ABORT(fs, res) { fp->flag \|= FA__ERROR; LEAVE_FF(fs, res); }
emh203	0:085749c8446f	106
emh203	0:085749c8446f	107	#ifndef NULL
emh203	0:085749c8446f	108	#define NULL 0
emh203	0:085749c8446f	109	#endif
emh203	0:085749c8446f	110
emh203	0:085749c8446f	111	/* Name status flags */
emh203	0:085749c8446f	112	#define NS 11 /* Offset of name status byte */
emh203	0:085749c8446f	113	#define NS_LOSS 0x01 /* Out of 8.3 format */
emh203	0:085749c8446f	114	#define NS_LFN 0x02 /* Force to create LFN entry */
emh203	0:085749c8446f	115	#define NS_LAST 0x04 /* Last segment */
emh203	0:085749c8446f	116	#define NS_BODY 0x08 /* Lower case flag (body) */
emh203	0:085749c8446f	117	#define NS_EXT 0x10 /* Lower case flag (ext) */
emh203	0:085749c8446f	118	#define NS_DOT 0x20 /* Dot entry */
emh203	0:085749c8446f	119
emh203	0:085749c8446f	120
emh203	0:085749c8446f	121
emh203	0:085749c8446f	122
emh203	0:085749c8446f	123	/*--------------------------------------------------------------------------
emh203	0:085749c8446f	124
emh203	0:085749c8446f	125	Private Work Area
emh203	0:085749c8446f	126
emh203	0:085749c8446f	127	---------------------------------------------------------------------------*/
emh203	0:085749c8446f	128
emh203	0:085749c8446f	129	#if _DRIVES < 1 \|\| _DRIVES > 9
emh203	0:085749c8446f	130	#error Number of drives must be 1-9.
emh203	0:085749c8446f	131	#endif
emh203	0:085749c8446f	132	static
emh203	0:085749c8446f	133	FATFS FatFs[_DRIVES]; / Pointer to the file system objects (logical drives) */
emh203	0:085749c8446f	134
emh203	0:085749c8446f	135	static
emh203	0:085749c8446f	136	WORD Fsid; /* File system mount ID */
emh203	0:085749c8446f	137
emh203	0:085749c8446f	138	#if _FS_RPATH
emh203	0:085749c8446f	139	static
emh203	0:085749c8446f	140	BYTE Drive; /* Current drive */
emh203	0:085749c8446f	141	#endif
emh203	0:085749c8446f	142
emh203	0:085749c8446f	143
emh203	0:085749c8446f	144	#if _USE_LFN == 1 /* LFN with static LFN working buffer */
emh203	0:085749c8446f	145	static
emh203	0:085749c8446f	146	WCHAR LfnBuf[_MAX_LFN + 1];
emh203	0:085749c8446f	147	#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR *lp = LfnBuf
emh203	0:085749c8446f	148	#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
emh203	0:085749c8446f	149
emh203	0:085749c8446f	150	#elif _USE_LFN > 1 /* LFN with dynamic LFN working buffer */
emh203	0:085749c8446f	151	#define NAMEBUF(sp,lp) BYTE sp[12]; WCHAR lbuf[_MAX_LFN + 1], *lp = lbuf
emh203	0:085749c8446f	152	#define INITBUF(dj,sp,lp) dj.fn = sp; dj.lfn = lp
emh203	0:085749c8446f	153
emh203	0:085749c8446f	154	#else /* No LFN */
emh203	0:085749c8446f	155	#define NAMEBUF(sp,lp) BYTE sp[12]
emh203	0:085749c8446f	156	#define INITBUF(dj,sp,lp) dj.fn = sp
emh203	0:085749c8446f	157
emh203	0:085749c8446f	158	#endif
emh203	0:085749c8446f	159
emh203	0:085749c8446f	160
emh203	0:085749c8446f	161
emh203	0:085749c8446f	162
emh203	0:085749c8446f	163	/*--------------------------------------------------------------------------
emh203	0:085749c8446f	164
emh203	0:085749c8446f	165	Module Private Functions
emh203	0:085749c8446f	166
emh203	0:085749c8446f	167	---------------------------------------------------------------------------*/
emh203	0:085749c8446f	168
emh203	0:085749c8446f	169
emh203	0:085749c8446f	170	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	171	/* String functions */
emh203	0:085749c8446f	172	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	173
emh203	0:085749c8446f	174	/* Copy memory to memory */
emh203	0:085749c8446f	175	static
emh203	0:085749c8446f	176	void mem_cpy (void* dst, const void* src, int cnt) {
emh203	0:085749c8446f	177	char d = (char)dst;
emh203	0:085749c8446f	178	const char s = (const char )src;
emh203	0:085749c8446f	179	while (cnt--) d++ = s++;
emh203	0:085749c8446f	180	}
emh203	0:085749c8446f	181
emh203	0:085749c8446f	182	/* Fill memory */
emh203	0:085749c8446f	183	static
emh203	0:085749c8446f	184	void mem_set (void* dst, int val, int cnt) {
emh203	0:085749c8446f	185	char d = (char)dst;
emh203	0:085749c8446f	186	while (cnt--) *d++ = (char)val;
emh203	0:085749c8446f	187	}
emh203	0:085749c8446f	188
emh203	0:085749c8446f	189	/* Compare memory to memory */
emh203	0:085749c8446f	190	static
emh203	0:085749c8446f	191	int mem_cmp (const void* dst, const void* src, int cnt) {
emh203	0:085749c8446f	192	const char d = (const char )dst, s = (const char )src;
emh203	0:085749c8446f	193	int r = 0;
emh203	0:085749c8446f	194	while (cnt-- && (r = d++ - s++) == 0) ;
emh203	0:085749c8446f	195	return r;
emh203	0:085749c8446f	196	}
emh203	0:085749c8446f	197
emh203	0:085749c8446f	198	/* Check if chr is contained in the string */
emh203	0:085749c8446f	199	static
emh203	0:085749c8446f	200	int chk_chr (const char* str, int chr) {
emh203	0:085749c8446f	201	while (str && str != chr) str++;
emh203	0:085749c8446f	202	return *str;
emh203	0:085749c8446f	203	}
emh203	0:085749c8446f	204
emh203	0:085749c8446f	205
emh203	0:085749c8446f	206
emh203	0:085749c8446f	207	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	208	/* Request/Release grant to access the volume */
emh203	0:085749c8446f	209	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	210	#if _FS_REENTRANT
emh203	0:085749c8446f	211
emh203	0:085749c8446f	212	static
emh203	0:085749c8446f	213	BOOL lock_fs (
emh203	0:085749c8446f	214	FATFS fs / File system object */
emh203	0:085749c8446f	215	)
emh203	0:085749c8446f	216	{
emh203	0:085749c8446f	217	return ff_req_grant(fs->sobj);
emh203	0:085749c8446f	218	}
emh203	0:085749c8446f	219
emh203	0:085749c8446f	220
emh203	0:085749c8446f	221	static
emh203	0:085749c8446f	222	void unlock_fs (
emh203	0:085749c8446f	223	FATFS fs, / File system object */
emh203	0:085749c8446f	224	FRESULT res /* Result code to be returned */
emh203	0:085749c8446f	225	)
emh203	0:085749c8446f	226	{
emh203	0:085749c8446f	227	if (res != FR_NOT_ENABLED &&
emh203	0:085749c8446f	228	res != FR_INVALID_DRIVE &&
emh203	0:085749c8446f	229	res != FR_INVALID_OBJECT &&
emh203	0:085749c8446f	230	res != FR_TIMEOUT) {
emh203	0:085749c8446f	231	ff_rel_grant(fs->sobj);
emh203	0:085749c8446f	232	}
emh203	0:085749c8446f	233	}
emh203	0:085749c8446f	234	#endif
emh203	0:085749c8446f	235
emh203	0:085749c8446f	236
emh203	0:085749c8446f	237
emh203	0:085749c8446f	238	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	239	/* Change window offset */
emh203	0:085749c8446f	240	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	241
emh203	0:085749c8446f	242	static
emh203	0:085749c8446f	243	FRESULT move_window (
emh203	0:085749c8446f	244	FATFS fs, / File system object */
emh203	0:085749c8446f	245	DWORD sector /* Sector number to make apperance in the fs->win[] */
emh203	0:085749c8446f	246	) /* Move to zero only writes back dirty window */
emh203	0:085749c8446f	247	{
emh203	0:085749c8446f	248	DWORD wsect;
emh203	0:085749c8446f	249
emh203	0:085749c8446f	250
emh203	0:085749c8446f	251	wsect = fs->winsect;
emh203	0:085749c8446f	252	if (wsect != sector) { /* Changed current window */
emh203	0:085749c8446f	253	#if !_FS_READONLY
emh203	0:085749c8446f	254	if (fs->wflag) { /* Write back dirty window if needed */
emh203	0:085749c8446f	255	if (disk_write(fs->drive, fs->win, wsect, 1) != RES_OK)
emh203	0:085749c8446f	256	return FR_DISK_ERR;
emh203	0:085749c8446f	257	fs->wflag = 0;
emh203	0:085749c8446f	258	if (wsect < (fs->fatbase + fs->sects_fat)) { /* In FAT area */
emh203	0:085749c8446f	259	BYTE nf;
emh203	0:085749c8446f	260	for (nf = fs->n_fats; nf > 1; nf--) { /* Refrect the change to all FAT copies */
emh203	0:085749c8446f	261	wsect += fs->sects_fat;
emh203	0:085749c8446f	262	disk_write(fs->drive, fs->win, wsect, 1);
emh203	0:085749c8446f	263	}
emh203	0:085749c8446f	264	}
emh203	0:085749c8446f	265	}
emh203	0:085749c8446f	266	#endif
emh203	0:085749c8446f	267	if (sector) {
emh203	0:085749c8446f	268	if (disk_read(fs->drive, fs->win, sector, 1) != RES_OK)
emh203	0:085749c8446f	269	return FR_DISK_ERR;
emh203	0:085749c8446f	270	fs->winsect = sector;
emh203	0:085749c8446f	271	}
emh203	0:085749c8446f	272	}
emh203	0:085749c8446f	273
emh203	0:085749c8446f	274	return FR_OK;
emh203	0:085749c8446f	275	}
emh203	0:085749c8446f	276
emh203	0:085749c8446f	277
emh203	0:085749c8446f	278
emh203	0:085749c8446f	279
emh203	0:085749c8446f	280	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	281	/* Clean-up cached data */
emh203	0:085749c8446f	282	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	283	#if !_FS_READONLY
emh203	0:085749c8446f	284	static
emh203	0:085749c8446f	285	FRESULT sync ( /* FR_OK: successful, FR_DISK_ERR: failed */
emh203	0:085749c8446f	286	FATFS fs / File system object */
emh203	0:085749c8446f	287	)
emh203	0:085749c8446f	288	{
emh203	0:085749c8446f	289	FRESULT res;
emh203	0:085749c8446f	290
emh203	0:085749c8446f	291
emh203	0:085749c8446f	292	res = move_window(fs, 0);
emh203	0:085749c8446f	293	if (res == FR_OK) {
emh203	0:085749c8446f	294	/* Update FSInfo sector if needed */
emh203	0:085749c8446f	295	if (fs->fs_type == FS_FAT32 && fs->fsi_flag) {
emh203	0:085749c8446f	296	fs->winsect = 0;
emh203	0:085749c8446f	297	mem_set(fs->win, 0, 512);
emh203	0:085749c8446f	298	ST_WORD(fs->win+BS_55AA, 0xAA55);
emh203	0:085749c8446f	299	ST_DWORD(fs->win+FSI_LeadSig, 0x41615252);
emh203	0:085749c8446f	300	ST_DWORD(fs->win+FSI_StrucSig, 0x61417272);
emh203	0:085749c8446f	301	ST_DWORD(fs->win+FSI_Free_Count, fs->free_clust);
emh203	0:085749c8446f	302	ST_DWORD(fs->win+FSI_Nxt_Free, fs->last_clust);
emh203	0:085749c8446f	303	disk_write(fs->drive, fs->win, fs->fsi_sector, 1);
emh203	0:085749c8446f	304	fs->fsi_flag = 0;
emh203	0:085749c8446f	305	}
emh203	0:085749c8446f	306	/* Make sure that no pending write process in the physical drive */
emh203	0:085749c8446f	307	if (disk_ioctl(fs->drive, CTRL_SYNC, (void*)NULL) != RES_OK)
emh203	0:085749c8446f	308	res = FR_DISK_ERR;
emh203	0:085749c8446f	309	}
emh203	0:085749c8446f	310
emh203	0:085749c8446f	311	return res;
emh203	0:085749c8446f	312	}
emh203	0:085749c8446f	313	#endif
emh203	0:085749c8446f	314
emh203	0:085749c8446f	315
emh203	0:085749c8446f	316
emh203	0:085749c8446f	317
emh203	0:085749c8446f	318	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	319	/* FAT access - Read value of a FAT entry */
emh203	0:085749c8446f	320	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	321
emh203	0:085749c8446f	322
emh203	0:085749c8446f	323	DWORD get_fat ( /* 0xFFFFFFFF:Disk error, 1:Interal error, Else:Cluster status */
emh203	0:085749c8446f	324	FATFS fs, / File system object */
emh203	0:085749c8446f	325	DWORD clst /* Cluster# to get the link information */
emh203	0:085749c8446f	326	)
emh203	0:085749c8446f	327	{
emh203	0:085749c8446f	328	UINT wc, bc;
emh203	0:085749c8446f	329	DWORD fsect;
emh203	0:085749c8446f	330
emh203	0:085749c8446f	331
emh203	0:085749c8446f	332	if (clst < 2 \|\| clst >= fs->max_clust) /* Range check */
emh203	0:085749c8446f	333	return 1;
emh203	0:085749c8446f	334
emh203	0:085749c8446f	335	fsect = fs->fatbase;
emh203	0:085749c8446f	336	switch (fs->fs_type) {
emh203	0:085749c8446f	337	case FS_FAT12 :
emh203	0:085749c8446f	338	bc = clst; bc += bc / 2;
emh203	0:085749c8446f	339	if (move_window(fs, fsect + (bc / SS(fs)))) break;
emh203	0:085749c8446f	340	wc = fs->win[bc & (SS(fs) - 1)]; bc++;
emh203	0:085749c8446f	341	if (move_window(fs, fsect + (bc / SS(fs)))) break;
emh203	0:085749c8446f	342	wc \|= (WORD)fs->win[bc & (SS(fs) - 1)] << 8;
emh203	0:085749c8446f	343	return (clst & 1) ? (wc >> 4) : (wc & 0xFFF);
emh203	0:085749c8446f	344
emh203	0:085749c8446f	345	case FS_FAT16 :
emh203	0:085749c8446f	346	if (move_window(fs, fsect + (clst / (SS(fs) / 2)))) break;
emh203	0:085749c8446f	347	return LD_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)]);
emh203	0:085749c8446f	348
emh203	0:085749c8446f	349	case FS_FAT32 :
emh203	0:085749c8446f	350	if (move_window(fs, fsect + (clst / (SS(fs) / 4)))) break;
emh203	0:085749c8446f	351	return LD_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)]) & 0x0FFFFFFF;
emh203	0:085749c8446f	352	}
emh203	0:085749c8446f	353
emh203	0:085749c8446f	354	return 0xFFFFFFFF; /* An error occured at the disk I/O layer */
emh203	0:085749c8446f	355	}
emh203	0:085749c8446f	356
emh203	0:085749c8446f	357
emh203	0:085749c8446f	358
emh203	0:085749c8446f	359
emh203	0:085749c8446f	360	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	361	/* FAT access - Change value of a FAT entry */
emh203	0:085749c8446f	362	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	363	#if !_FS_READONLY
emh203	0:085749c8446f	364
emh203	0:085749c8446f	365	FRESULT put_fat (
emh203	0:085749c8446f	366	FATFS fs, / File system object */
emh203	0:085749c8446f	367	DWORD clst, /* Cluster# to be changed in range of 2 to fs->max_clust - 1 */
emh203	0:085749c8446f	368	DWORD val /* New value to mark the cluster */
emh203	0:085749c8446f	369	)
emh203	0:085749c8446f	370	{
emh203	0:085749c8446f	371	UINT bc;
emh203	0:085749c8446f	372	BYTE *p;
emh203	0:085749c8446f	373	DWORD fsect;
emh203	0:085749c8446f	374	FRESULT res;
emh203	0:085749c8446f	375
emh203	0:085749c8446f	376
emh203	0:085749c8446f	377	if (clst < 2 \|\| clst >= fs->max_clust) { /* Range check */
emh203	0:085749c8446f	378	res = FR_INT_ERR;
emh203	0:085749c8446f	379
emh203	0:085749c8446f	380	} else {
emh203	0:085749c8446f	381	fsect = fs->fatbase;
emh203	0:085749c8446f	382	switch (fs->fs_type) {
emh203	0:085749c8446f	383	case FS_FAT12 :
emh203	0:085749c8446f	384	bc = clst; bc += bc / 2;
emh203	0:085749c8446f	385	res = move_window(fs, fsect + (bc / SS(fs)));
emh203	0:085749c8446f	386	if (res != FR_OK) break;
emh203	0:085749c8446f	387	p = &fs->win[bc & (SS(fs) - 1)];
emh203	0:085749c8446f	388	p = (clst & 1) ? ((p & 0x0F) \| ((BYTE)val << 4)) : (BYTE)val;
emh203	0:085749c8446f	389	bc++;
emh203	0:085749c8446f	390	fs->wflag = 1;
emh203	0:085749c8446f	391	res = move_window(fs, fsect + (bc / SS(fs)));
emh203	0:085749c8446f	392	if (res != FR_OK) break;
emh203	0:085749c8446f	393	p = &fs->win[bc & (SS(fs) - 1)];
emh203	0:085749c8446f	394	p = (clst & 1) ? (BYTE)(val >> 4) : ((p & 0xF0) \| ((BYTE)(val >> 8) & 0x0F));
emh203	0:085749c8446f	395	break;
emh203	0:085749c8446f	396
emh203	0:085749c8446f	397	case FS_FAT16 :
emh203	0:085749c8446f	398	res = move_window(fs, fsect + (clst / (SS(fs) / 2)));
emh203	0:085749c8446f	399	if (res != FR_OK) break;
emh203	0:085749c8446f	400	ST_WORD(&fs->win[((WORD)clst * 2) & (SS(fs) - 1)], (WORD)val);
emh203	0:085749c8446f	401	break;
emh203	0:085749c8446f	402
emh203	0:085749c8446f	403	case FS_FAT32 :
emh203	0:085749c8446f	404	res = move_window(fs, fsect + (clst / (SS(fs) / 4)));
emh203	0:085749c8446f	405	if (res != FR_OK) break;
emh203	0:085749c8446f	406	ST_DWORD(&fs->win[((WORD)clst * 4) & (SS(fs) - 1)], val);
emh203	0:085749c8446f	407	break;
emh203	0:085749c8446f	408
emh203	0:085749c8446f	409	default :
emh203	0:085749c8446f	410	res = FR_INT_ERR;
emh203	0:085749c8446f	411	}
emh203	0:085749c8446f	412	fs->wflag = 1;
emh203	0:085749c8446f	413	}
emh203	0:085749c8446f	414
emh203	0:085749c8446f	415	return res;
emh203	0:085749c8446f	416	}
emh203	0:085749c8446f	417	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	418
emh203	0:085749c8446f	419
emh203	0:085749c8446f	420
emh203	0:085749c8446f	421
emh203	0:085749c8446f	422	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	423	/* FAT handling - Remove a cluster chain */
emh203	0:085749c8446f	424	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	425	#if !_FS_READONLY
emh203	0:085749c8446f	426	static
emh203	0:085749c8446f	427	FRESULT remove_chain (
emh203	0:085749c8446f	428	FATFS fs, / File system object */
emh203	0:085749c8446f	429	DWORD clst /* Cluster# to remove a chain from */
emh203	0:085749c8446f	430	)
emh203	0:085749c8446f	431	{
emh203	0:085749c8446f	432	FRESULT res;
emh203	0:085749c8446f	433	DWORD nxt;
emh203	0:085749c8446f	434
emh203	0:085749c8446f	435
emh203	0:085749c8446f	436	if (clst < 2 \|\| clst >= fs->max_clust) { /* Check the range of cluster# */
emh203	0:085749c8446f	437	res = FR_INT_ERR;
emh203	0:085749c8446f	438
emh203	0:085749c8446f	439	} else {
emh203	0:085749c8446f	440	res = FR_OK;
emh203	0:085749c8446f	441	while (clst < fs->max_clust) { /* Not a last link? */
emh203	0:085749c8446f	442	nxt = get_fat(fs, clst); /* Get cluster status */
emh203	0:085749c8446f	443	if (nxt == 0) break; /* Empty cluster? */
emh203	0:085749c8446f	444	if (nxt == 1) { res = FR_INT_ERR; break; } /* Internal error? */
emh203	0:085749c8446f	445	if (nxt == 0xFFFFFFFF) { res = FR_DISK_ERR; break; } /* Disk error? */
emh203	0:085749c8446f	446	res = put_fat(fs, clst, 0); /* Mark the cluster "empty" */
emh203	0:085749c8446f	447	if (res != FR_OK) break;
emh203	0:085749c8446f	448	if (fs->free_clust != 0xFFFFFFFF) { /* Update FSInfo */
emh203	0:085749c8446f	449	fs->free_clust++;
emh203	0:085749c8446f	450	fs->fsi_flag = 1;
emh203	0:085749c8446f	451	}
emh203	0:085749c8446f	452	clst = nxt; /* Next cluster */
emh203	0:085749c8446f	453	}
emh203	0:085749c8446f	454	}
emh203	0:085749c8446f	455
emh203	0:085749c8446f	456	return res;
emh203	0:085749c8446f	457	}
emh203	0:085749c8446f	458	#endif
emh203	0:085749c8446f	459
emh203	0:085749c8446f	460
emh203	0:085749c8446f	461
emh203	0:085749c8446f	462
emh203	0:085749c8446f	463	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	464	/* FAT handling - Stretch or Create a cluster chain */
emh203	0:085749c8446f	465	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	466	#if !_FS_READONLY
emh203	0:085749c8446f	467	static
emh203	0:085749c8446f	468	DWORD create_chain ( /* 0:No free cluster, 1:Internal error, 0xFFFFFFFF:Disk error, >=2:New cluster# */
emh203	0:085749c8446f	469	FATFS fs, / File system object */
emh203	0:085749c8446f	470	DWORD clst /* Cluster# to stretch. 0 means create a new chain. */
emh203	0:085749c8446f	471	)
emh203	0:085749c8446f	472	{
emh203	0:085749c8446f	473	DWORD cs, ncl, scl, mcl;
emh203	0:085749c8446f	474
emh203	0:085749c8446f	475
emh203	0:085749c8446f	476	mcl = fs->max_clust;
emh203	0:085749c8446f	477	if (clst == 0) { /* Create new chain */
emh203	0:085749c8446f	478	scl = fs->last_clust; /* Get suggested start point */
emh203	0:085749c8446f	479	if (scl == 0 \|\| scl >= mcl) scl = 1;
emh203	0:085749c8446f	480	}
emh203	0:085749c8446f	481	else { /* Stretch existing chain */
emh203	0:085749c8446f	482	cs = get_fat(fs, clst); /* Check the cluster status */
emh203	0:085749c8446f	483	if (cs < 2) return 1; /* It is an invalid cluster */
emh203	0:085749c8446f	484	if (cs < mcl) return cs; /* It is already followed by next cluster */
emh203	0:085749c8446f	485	scl = clst;
emh203	0:085749c8446f	486	}
emh203	0:085749c8446f	487
emh203	0:085749c8446f	488	ncl = scl; /* Start cluster */
emh203	0:085749c8446f	489	for (;;) {
emh203	0:085749c8446f	490	ncl++; /* Next cluster */
emh203	0:085749c8446f	491	if (ncl >= mcl) { /* Wrap around */
emh203	0:085749c8446f	492	ncl = 2;
emh203	0:085749c8446f	493	if (ncl > scl) return 0; /* No free custer */
emh203	0:085749c8446f	494	}
emh203	0:085749c8446f	495	cs = get_fat(fs, ncl); /* Get the cluster status */
emh203	0:085749c8446f	496	if (cs == 0) break; /* Found a free cluster */
emh203	0:085749c8446f	497	if (cs == 0xFFFFFFFF \|\| cs == 1)/* An error occured */
emh203	0:085749c8446f	498	return cs;
emh203	0:085749c8446f	499	if (ncl == scl) return 0; /* No free custer */
emh203	0:085749c8446f	500	}
emh203	0:085749c8446f	501
emh203	0:085749c8446f	502	if (put_fat(fs, ncl, 0x0FFFFFFF)) /* Mark the new cluster "in use" */
emh203	0:085749c8446f	503	return 0xFFFFFFFF;
emh203	0:085749c8446f	504	if (clst != 0) { /* Link it to the previous one if needed */
emh203	0:085749c8446f	505	if (put_fat(fs, clst, ncl))
emh203	0:085749c8446f	506	return 0xFFFFFFFF;
emh203	0:085749c8446f	507	}
emh203	0:085749c8446f	508
emh203	0:085749c8446f	509	fs->last_clust = ncl; /* Update FSINFO */
emh203	0:085749c8446f	510	if (fs->free_clust != 0xFFFFFFFF) {
emh203	0:085749c8446f	511	fs->free_clust--;
emh203	0:085749c8446f	512	fs->fsi_flag = 1;
emh203	0:085749c8446f	513	}
emh203	0:085749c8446f	514
emh203	0:085749c8446f	515	return ncl; /* Return new cluster number */
emh203	0:085749c8446f	516	}
emh203	0:085749c8446f	517	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	518
emh203	0:085749c8446f	519
emh203	0:085749c8446f	520
emh203	0:085749c8446f	521
emh203	0:085749c8446f	522	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	523	/* Get sector# from cluster# */
emh203	0:085749c8446f	524	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	525
emh203	0:085749c8446f	526
emh203	0:085749c8446f	527	DWORD clust2sect ( /* !=0: Sector number, 0: Failed - invalid cluster# */
emh203	0:085749c8446f	528	FATFS fs, / File system object */
emh203	0:085749c8446f	529	DWORD clst /* Cluster# to be converted */
emh203	0:085749c8446f	530	)
emh203	0:085749c8446f	531	{
emh203	0:085749c8446f	532	clst -= 2;
emh203	0:085749c8446f	533	if (clst >= (fs->max_clust - 2)) return 0; /* Invalid cluster# */
emh203	0:085749c8446f	534	return clst * fs->csize + fs->database;
emh203	0:085749c8446f	535	}
emh203	0:085749c8446f	536
emh203	0:085749c8446f	537
emh203	0:085749c8446f	538
emh203	0:085749c8446f	539
emh203	0:085749c8446f	540	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	541	/* Directory handling - Seek directory index */
emh203	0:085749c8446f	542	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	543
emh203	0:085749c8446f	544	static
emh203	0:085749c8446f	545	FRESULT dir_seek (
emh203	0:085749c8446f	546	eDIR dj, / Pointer to directory object */
emh203	0:085749c8446f	547	WORD idx /* Directory index number */
emh203	0:085749c8446f	548	)
emh203	0:085749c8446f	549	{
emh203	0:085749c8446f	550	DWORD clst;
emh203	0:085749c8446f	551	WORD ic;
emh203	0:085749c8446f	552
emh203	0:085749c8446f	553
emh203	0:085749c8446f	554	dj->index = idx;
emh203	0:085749c8446f	555	clst = dj->sclust;
emh203	0:085749c8446f	556	if (clst == 1 \|\| clst >= dj->fs->max_clust) /* Check start cluster range */
emh203	0:085749c8446f	557	return FR_INT_ERR;
emh203	0:085749c8446f	558	if (!clst && dj->fs->fs_type == FS_FAT32) /* Replace cluster# 0 with root cluster# if in FAT32 */
emh203	0:085749c8446f	559	clst = dj->fs->dirbase;
emh203	0:085749c8446f	560
emh203	0:085749c8446f	561	if (clst == 0) { /* Static table */
emh203	0:085749c8446f	562	dj->clust = clst;
emh203	0:085749c8446f	563	if (idx >= dj->fs->n_rootdir) /* Index is out of range */
emh203	0:085749c8446f	564	return FR_INT_ERR;
emh203	0:085749c8446f	565	dj->sect = dj->fs->dirbase + idx / (SS(dj->fs) / 32); /* Sector# */
emh203	0:085749c8446f	566	}
emh203	0:085749c8446f	567	else { /* Dynamic table */
emh203	0:085749c8446f	568	ic = SS(dj->fs) / 32 * dj->fs->csize; /* Entries per cluster */
emh203	0:085749c8446f	569	while (idx >= ic) { /* Follow cluster chain */
emh203	0:085749c8446f	570	clst = get_fat(dj->fs, clst); /* Get next cluster */
emh203	0:085749c8446f	571	if (clst == 0xFFFFFFFF) return FR_DISK_ERR; /* Disk error */
emh203	0:085749c8446f	572	if (clst < 2 \|\| clst >= dj->fs->max_clust) /* Reached to end of table or int error */
emh203	0:085749c8446f	573	return FR_INT_ERR;
emh203	0:085749c8446f	574	idx -= ic;
emh203	0:085749c8446f	575	}
emh203	0:085749c8446f	576	dj->clust = clst;
emh203	0:085749c8446f	577	dj->sect = clust2sect(dj->fs, clst) + idx / (SS(dj->fs) / 32); /* Sector# */
emh203	0:085749c8446f	578	}
emh203	0:085749c8446f	579
emh203	0:085749c8446f	580	dj->dir = dj->fs->win + (idx % (SS(dj->fs) / 32)) * 32; /* Ptr to the entry in the sector */
emh203	0:085749c8446f	581
emh203	0:085749c8446f	582	return FR_OK; /* Seek succeeded */
emh203	0:085749c8446f	583	}
emh203	0:085749c8446f	584
emh203	0:085749c8446f	585
emh203	0:085749c8446f	586
emh203	0:085749c8446f	587
emh203	0:085749c8446f	588	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	589	/* Directory handling - Move directory index next */
emh203	0:085749c8446f	590	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	591
emh203	0:085749c8446f	592	static
emh203	0:085749c8446f	593	FRESULT dir_next ( /* FR_OK:Succeeded, FR_NO_FILE:End of table, FR_DENIED:EOT and could not streach */
emh203	0:085749c8446f	594	eDIR dj, / Pointer to directory object */
emh203	0:085749c8446f	595	BOOL streach /* FALSE: Do not streach table, TRUE: Streach table if needed */
emh203	0:085749c8446f	596	)
emh203	0:085749c8446f	597	{
emh203	0:085749c8446f	598	DWORD clst;
emh203	0:085749c8446f	599	WORD i;
emh203	0:085749c8446f	600
emh203	0:085749c8446f	601
emh203	0:085749c8446f	602	i = dj->index + 1;
emh203	0:085749c8446f	603	if (!i \|\| !dj->sect) /* Report EOT when index has reached 65535 */
emh203	0:085749c8446f	604	return FR_NO_FILE;
emh203	0:085749c8446f	605
emh203	0:085749c8446f	606	if (!(i % (SS(dj->fs) / 32))) { /* Sector changed? */
emh203	0:085749c8446f	607	dj->sect++; /* Next sector */
emh203	0:085749c8446f	608
emh203	0:085749c8446f	609	if (dj->clust == 0) { /* Static table */
emh203	0:085749c8446f	610	if (i >= dj->fs->n_rootdir) /* Report EOT when end of table */
emh203	0:085749c8446f	611	return FR_NO_FILE;
emh203	0:085749c8446f	612	}
emh203	0:085749c8446f	613	else { /* Dynamic table */
emh203	0:085749c8446f	614	if (((i / (SS(dj->fs) / 32)) & (dj->fs->csize - 1)) == 0) { /* Cluster changed? */
emh203	0:085749c8446f	615	clst = get_fat(dj->fs, dj->clust); /* Get next cluster */
emh203	0:085749c8446f	616	if (clst <= 1) return FR_INT_ERR;
emh203	0:085749c8446f	617	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
emh203	0:085749c8446f	618	if (clst >= dj->fs->max_clust) { /* When it reached end of dynamic table */
emh203	0:085749c8446f	619	#if !_FS_READONLY
emh203	0:085749c8446f	620	BYTE c;
emh203	0:085749c8446f	621	if (!streach) return FR_NO_FILE; /* When do not streach, report EOT */
emh203	0:085749c8446f	622	clst = create_chain(dj->fs, dj->clust); /* Streach cluster chain */
emh203	0:085749c8446f	623	if (clst == 0) return FR_DENIED; /* No free cluster */
emh203	0:085749c8446f	624	if (clst == 1) return FR_INT_ERR;
emh203	0:085749c8446f	625	if (clst == 0xFFFFFFFF) return FR_DISK_ERR;
emh203	0:085749c8446f	626	/* Clean-up streached table */
emh203	0:085749c8446f	627	if (move_window(dj->fs, 0)) return FR_DISK_ERR; /* Flush active window */
emh203	0:085749c8446f	628	mem_set(dj->fs->win, 0, SS(dj->fs)); /* Clear window buffer */
emh203	0:085749c8446f	629	dj->fs->winsect = clust2sect(dj->fs, clst); /* Cluster start sector */
emh203	0:085749c8446f	630	for (c = 0; c < dj->fs->csize; c++) { /* Fill the new cluster with 0 */
emh203	0:085749c8446f	631	dj->fs->wflag = 1;
emh203	0:085749c8446f	632	if (move_window(dj->fs, 0)) return FR_DISK_ERR;
emh203	0:085749c8446f	633	dj->fs->winsect++;
emh203	0:085749c8446f	634	}
emh203	0:085749c8446f	635	dj->fs->winsect -= c; /* Rewind window address */
emh203	0:085749c8446f	636	#else
emh203	0:085749c8446f	637	return FR_NO_FILE; /* Report EOT */
emh203	0:085749c8446f	638	#endif
emh203	0:085749c8446f	639	}
emh203	0:085749c8446f	640	dj->clust = clst; /* Initialize data for new cluster */
emh203	0:085749c8446f	641	dj->sect = clust2sect(dj->fs, clst);
emh203	0:085749c8446f	642	}
emh203	0:085749c8446f	643	}
emh203	0:085749c8446f	644	}
emh203	0:085749c8446f	645
emh203	0:085749c8446f	646	dj->index = i;
emh203	0:085749c8446f	647	dj->dir = dj->fs->win + (i % (SS(dj->fs) / 32)) * 32;
emh203	0:085749c8446f	648
emh203	0:085749c8446f	649	return FR_OK;
emh203	0:085749c8446f	650	}
emh203	0:085749c8446f	651
emh203	0:085749c8446f	652
emh203	0:085749c8446f	653
emh203	0:085749c8446f	654
emh203	0:085749c8446f	655	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	656	/* LFN handling - Test/Pick/Fit an LFN segment from/to directory entry */
emh203	0:085749c8446f	657	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	658	#if _USE_LFN
emh203	0:085749c8446f	659	static
emh203	0:085749c8446f	660	const BYTE LfnOfs[] = {1,3,5,7,9,14,16,18,20,22,24,28,30}; /* Offset of LFN chars in the directory entry */
emh203	0:085749c8446f	661
emh203	0:085749c8446f	662
emh203	0:085749c8446f	663	static
emh203	0:085749c8446f	664	BOOL cmp_lfn ( /* TRUE:Matched, FALSE:Not matched */
emh203	0:085749c8446f	665	WCHAR lfnbuf, / Pointer to the LFN to be compared */
emh203	0:085749c8446f	666	BYTE dir / Pointer to the directory entry containing a part of LFN */
emh203	0:085749c8446f	667	)
emh203	0:085749c8446f	668	{
emh203	0:085749c8446f	669	int i, s;
emh203	0:085749c8446f	670	WCHAR wc, uc;
emh203	0:085749c8446f	671
emh203	0:085749c8446f	672
emh203	0:085749c8446f	673	i = ((dir[LDIR_Ord] & 0xBF) - 1) * 13; /* Get offset in the LFN buffer */
emh203	0:085749c8446f	674	s = 0; wc = 1;
emh203	0:085749c8446f	675	do {
emh203	0:085749c8446f	676	uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
emh203	0:085749c8446f	677	if (wc) { /* Last char has not been processed */
emh203	0:085749c8446f	678	wc = ff_wtoupper(uc); /* Convert it to upper case */
emh203	0:085749c8446f	679	if (i >= _MAX_LFN \|\| wc != ff_wtoupper(lfnbuf[i++])) /* Compare it */
emh203	0:085749c8446f	680	return FALSE; /* Not matched */
emh203	0:085749c8446f	681	} else {
emh203	0:085749c8446f	682	if (uc != 0xFFFF) return FALSE; /* Check filler */
emh203	0:085749c8446f	683	}
emh203	0:085749c8446f	684	} while (++s < 13); /* Repeat until all chars in the entry are checked */
emh203	0:085749c8446f	685
emh203	0:085749c8446f	686	if ((dir[LDIR_Ord] & 0x40) && wc && lfnbuf[i]) /* Last segment matched but different length */
emh203	0:085749c8446f	687	return FALSE;
emh203	0:085749c8446f	688
emh203	0:085749c8446f	689	return TRUE; /* The part of LFN matched */
emh203	0:085749c8446f	690	}
emh203	0:085749c8446f	691
emh203	0:085749c8446f	692
emh203	0:085749c8446f	693
emh203	0:085749c8446f	694	static
emh203	0:085749c8446f	695	BOOL pick_lfn ( /* TRUE:Succeeded, FALSE:Buffer overflow */
emh203	0:085749c8446f	696	WCHAR lfnbuf, / Pointer to the Unicode-LFN buffer */
emh203	0:085749c8446f	697	BYTE dir / Pointer to the directory entry */
emh203	0:085749c8446f	698	)
emh203	0:085749c8446f	699	{
emh203	0:085749c8446f	700	int i, s;
emh203	0:085749c8446f	701	WCHAR wc, uc;
emh203	0:085749c8446f	702
emh203	0:085749c8446f	703
emh203	0:085749c8446f	704	i = ((dir[LDIR_Ord] & 0x3F) - 1) * 13; /* Offset in the LFN buffer */
emh203	0:085749c8446f	705
emh203	0:085749c8446f	706	s = 0; wc = 1;
emh203	0:085749c8446f	707	do {
emh203	0:085749c8446f	708	uc = LD_WORD(dir+LfnOfs[s]); /* Pick an LFN character from the entry */
emh203	0:085749c8446f	709	if (wc) { /* Last char has not been processed */
emh203	0:085749c8446f	710	if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
emh203	0:085749c8446f	711	lfnbuf[i++] = wc = uc; /* Store it */
emh203	0:085749c8446f	712	} else {
emh203	0:085749c8446f	713	if (uc != 0xFFFF) return FALSE; /* Check filler */
emh203	0:085749c8446f	714	}
emh203	0:085749c8446f	715	} while (++s < 13); /* Read all character in the entry */
emh203	0:085749c8446f	716
emh203	0:085749c8446f	717	if (dir[LDIR_Ord] & 0x40) { /* Put terminator if it is the last LFN part */
emh203	0:085749c8446f	718	if (i >= _MAX_LFN) return FALSE; /* Buffer overflow? */
emh203	0:085749c8446f	719	lfnbuf[i] = 0;
emh203	0:085749c8446f	720	}
emh203	0:085749c8446f	721
emh203	0:085749c8446f	722	return TRUE;
emh203	0:085749c8446f	723	}
emh203	0:085749c8446f	724
emh203	0:085749c8446f	725
emh203	0:085749c8446f	726	#if !_FS_READONLY
emh203	0:085749c8446f	727	static
emh203	0:085749c8446f	728	void fit_lfn (
emh203	0:085749c8446f	729	const WCHAR lfnbuf, / Pointer to the LFN buffer */
emh203	0:085749c8446f	730	BYTE dir, / Pointer to the directory entry */
emh203	0:085749c8446f	731	BYTE ord, /* LFN order (1-20) */
emh203	0:085749c8446f	732	BYTE sum /* SFN sum */
emh203	0:085749c8446f	733	)
emh203	0:085749c8446f	734	{
emh203	0:085749c8446f	735	int i, s;
emh203	0:085749c8446f	736	WCHAR wc;
emh203	0:085749c8446f	737
emh203	0:085749c8446f	738
emh203	0:085749c8446f	739	dir[LDIR_Chksum] = sum; /* Set check sum */
emh203	0:085749c8446f	740	dir[LDIR_Attr] = AM_LFN; /* Set attribute. LFN entry */
emh203	0:085749c8446f	741	dir[LDIR_Type] = 0;
emh203	0:085749c8446f	742	ST_WORD(dir+LDIR_FstClusLO, 0);
emh203	0:085749c8446f	743
emh203	0:085749c8446f	744	i = (ord - 1) * 13; /* Get offset in the LFN buffer */
emh203	0:085749c8446f	745	s = wc = 0;
emh203	0:085749c8446f	746	do {
emh203	0:085749c8446f	747	if (wc != 0xFFFF) wc = lfnbuf[i++]; /* Get an effective char */
emh203	0:085749c8446f	748	ST_WORD(dir+LfnOfs[s], wc); /* Put it */
emh203	0:085749c8446f	749	if (!wc) wc = 0xFFFF; /* Padding chars following last char */
emh203	0:085749c8446f	750	} while (++s < 13);
emh203	0:085749c8446f	751	if (wc == 0xFFFF \|\| !lfnbuf[i]) ord \|= 0x40; /* Bottom LFN part is the start of LFN sequence */
emh203	0:085749c8446f	752	dir[LDIR_Ord] = ord; /* Set the LFN order */
emh203	0:085749c8446f	753	}
emh203	0:085749c8446f	754
emh203	0:085749c8446f	755	#endif
emh203	0:085749c8446f	756	#endif
emh203	0:085749c8446f	757
emh203	0:085749c8446f	758
emh203	0:085749c8446f	759
emh203	0:085749c8446f	760	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	761	/* Create numbered name */
emh203	0:085749c8446f	762	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	763	#if _USE_LFN
emh203	0:085749c8446f	764	void gen_numname (
emh203	0:085749c8446f	765	BYTE dst, / Pointer to genartated SFN */
emh203	0:085749c8446f	766	const BYTE src, / Pointer to source SFN to be modified */
emh203	0:085749c8446f	767	const WCHAR lfn, / Pointer to LFN */
emh203	0:085749c8446f	768	WORD num /* Sequense number */
emh203	0:085749c8446f	769	)
emh203	0:085749c8446f	770	{
emh203	0:085749c8446f	771	char ns[8];
emh203	0:085749c8446f	772	int i, j;
emh203	0:085749c8446f	773
emh203	0:085749c8446f	774
emh203	0:085749c8446f	775	mem_cpy(dst, src, 11);
emh203	0:085749c8446f	776
emh203	0:085749c8446f	777	if (num > 5) { /* On many collisions, generate a hash number instead of sequencial number */
emh203	0:085749c8446f	778	do num = (num >> 1) + (num << 15) + (WORD)lfn++; while (lfn);
emh203	0:085749c8446f	779	}
emh203	0:085749c8446f	780
emh203	0:085749c8446f	781	/* itoa */
emh203	0:085749c8446f	782	i = 7;
emh203	0:085749c8446f	783	do {
emh203	0:085749c8446f	784	ns[i--] = (num % 10) + '0';
emh203	0:085749c8446f	785	num /= 10;
emh203	0:085749c8446f	786	} while (num);
emh203	0:085749c8446f	787	ns[i] = '~';
emh203	0:085749c8446f	788
emh203	0:085749c8446f	789	/* Append the number */
emh203	0:085749c8446f	790	for (j = 0; j < i && dst[j] != ' '; j++) {
emh203	0:085749c8446f	791	if (IsDBCS1(dst[j])) {
emh203	0:085749c8446f	792	if (j == i - 1) break;
emh203	0:085749c8446f	793	j++;
emh203	0:085749c8446f	794	}
emh203	0:085749c8446f	795	}
emh203	0:085749c8446f	796	do {
emh203	0:085749c8446f	797	dst[j++] = (i < 8) ? ns[i++] : ' ';
emh203	0:085749c8446f	798	} while (j < 8);
emh203	0:085749c8446f	799	}
emh203	0:085749c8446f	800	#endif
emh203	0:085749c8446f	801
emh203	0:085749c8446f	802
emh203	0:085749c8446f	803
emh203	0:085749c8446f	804
emh203	0:085749c8446f	805	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	806	/* Calculate sum of an SFN */
emh203	0:085749c8446f	807	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	808	#if _USE_LFN
emh203	0:085749c8446f	809	static
emh203	0:085749c8446f	810	BYTE sum_sfn (
emh203	0:085749c8446f	811	const BYTE dir / Ptr to directory entry */
emh203	0:085749c8446f	812	)
emh203	0:085749c8446f	813	{
emh203	0:085749c8446f	814	BYTE sum = 0;
emh203	0:085749c8446f	815	int n = 11;
emh203	0:085749c8446f	816
emh203	0:085749c8446f	817	do sum = (sum >> 1) + (sum << 7) + *dir++; while (--n);
emh203	0:085749c8446f	818	return sum;
emh203	0:085749c8446f	819	}
emh203	0:085749c8446f	820	#endif
emh203	0:085749c8446f	821
emh203	0:085749c8446f	822
emh203	0:085749c8446f	823
emh203	0:085749c8446f	824
emh203	0:085749c8446f	825	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	826	/* Directory handling - Find an object in the directory */
emh203	0:085749c8446f	827	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	828
emh203	0:085749c8446f	829	static
emh203	0:085749c8446f	830	FRESULT dir_find (
emh203	0:085749c8446f	831	eDIR dj / Pointer to the directory object linked to the file name */
emh203	0:085749c8446f	832	)
emh203	0:085749c8446f	833	{
emh203	0:085749c8446f	834	FRESULT res;
emh203	0:085749c8446f	835	BYTE c, *dir;
emh203	0:085749c8446f	836	#if _USE_LFN
emh203	0:085749c8446f	837	BYTE a, ord, sum;
emh203	0:085749c8446f	838	#endif
emh203	0:085749c8446f	839
emh203	0:085749c8446f	840	res = dir_seek(dj, 0); /* Rewind directory object */
emh203	0:085749c8446f	841	if (res != FR_OK) return res;
emh203	0:085749c8446f	842
emh203	0:085749c8446f	843	#if _USE_LFN
emh203	0:085749c8446f	844	ord = sum = 0xFF;
emh203	0:085749c8446f	845	#endif
emh203	0:085749c8446f	846	do {
emh203	0:085749c8446f	847	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	848	if (res != FR_OK) break;
emh203	0:085749c8446f	849	dir = dj->dir; /* Ptr to the directory entry of current index */
emh203	0:085749c8446f	850	c = dir[DIR_Name];
emh203	0:085749c8446f	851	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
emh203	0:085749c8446f	852	#if _USE_LFN /* LFN configuration */
emh203	0:085749c8446f	853	a = dir[DIR_Attr] & AM_MASK;
emh203	0:085749c8446f	854	if (c == 0xE5 \|\| ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
emh203	0:085749c8446f	855	ord = 0xFF;
emh203	0:085749c8446f	856	} else {
emh203	0:085749c8446f	857	if (a == AM_LFN) { /* An LFN entry is found */
emh203	0:085749c8446f	858	if (dj->lfn) {
emh203	0:085749c8446f	859	if (c & 0x40) { /* Is it start of LFN sequence? */
emh203	0:085749c8446f	860	sum = dir[LDIR_Chksum];
emh203	0:085749c8446f	861	c &= 0xBF; ord = c; /* LFN start order */
emh203	0:085749c8446f	862	dj->lfn_idx = dj->index;
emh203	0:085749c8446f	863	}
emh203	0:085749c8446f	864	/* Check validity of the LFN entry and compare it with given name */
emh203	0:085749c8446f	865	ord = (c == ord && sum == dir[LDIR_Chksum] && cmp_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
emh203	0:085749c8446f	866	}
emh203	0:085749c8446f	867	} else { /* An SFN entry is found */
emh203	0:085749c8446f	868	if (!ord && sum == sum_sfn(dir)) break; /* LFN matched? */
emh203	0:085749c8446f	869	ord = 0xFF; dj->lfn_idx = 0xFFFF; /* Reset LFN sequence */
emh203	0:085749c8446f	870	if (!(dj->fn[NS] & NS_LOSS) && !mem_cmp(dir, dj->fn, 11)) break; /* SFN matched? */
emh203	0:085749c8446f	871	}
emh203	0:085749c8446f	872	}
emh203	0:085749c8446f	873	#else /* Non LFN configuration */
emh203	0:085749c8446f	874	if (!(dir[DIR_Attr] & AM_VOL) && !mem_cmp(dir, dj->fn, 11)) /* Is it a valid entry? */
emh203	0:085749c8446f	875	break;
emh203	0:085749c8446f	876	#endif
emh203	0:085749c8446f	877	res = dir_next(dj, FALSE); /* Next entry */
emh203	0:085749c8446f	878	} while (res == FR_OK);
emh203	0:085749c8446f	879
emh203	0:085749c8446f	880	return res;
emh203	0:085749c8446f	881	}
emh203	0:085749c8446f	882
emh203	0:085749c8446f	883
emh203	0:085749c8446f	884
emh203	0:085749c8446f	885
emh203	0:085749c8446f	886	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	887	/* Read an object from the directory */
emh203	0:085749c8446f	888	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	889	#if _FS_MINIMIZE <= 1
emh203	0:085749c8446f	890	static
emh203	0:085749c8446f	891	FRESULT dir_read (
emh203	0:085749c8446f	892	eDIR dj / Pointer to the directory object that pointing the entry to be read */
emh203	0:085749c8446f	893	)
emh203	0:085749c8446f	894	{
emh203	0:085749c8446f	895	FRESULT res;
emh203	0:085749c8446f	896	BYTE c, *dir;
emh203	0:085749c8446f	897	#if _USE_LFN
emh203	0:085749c8446f	898	BYTE a, ord = 0xFF, sum = 0xFF;
emh203	0:085749c8446f	899	#endif
emh203	0:085749c8446f	900
emh203	0:085749c8446f	901	res = FR_NO_FILE;
emh203	0:085749c8446f	902	while (dj->sect) {
emh203	0:085749c8446f	903	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	904	if (res != FR_OK) break;
emh203	0:085749c8446f	905	dir = dj->dir; /* Ptr to the directory entry of current index */
emh203	0:085749c8446f	906	c = dir[DIR_Name];
emh203	0:085749c8446f	907	if (c == 0) { res = FR_NO_FILE; break; } /* Reached to end of table */
emh203	0:085749c8446f	908	#if _USE_LFN /* LFN configuration */
emh203	0:085749c8446f	909	a = dir[DIR_Attr] & AM_MASK;
emh203	0:085749c8446f	910	if (c == 0xE5 \|\| (!_FS_RPATH && c == '.') \|\| ((a & AM_VOL) && a != AM_LFN)) { /* An entry without valid data */
emh203	0:085749c8446f	911	ord = 0xFF;
emh203	0:085749c8446f	912	} else {
emh203	0:085749c8446f	913	if (a == AM_LFN) { /* An LFN entry is found */
emh203	0:085749c8446f	914	if (c & 0x40) { /* Is it start of LFN sequence? */
emh203	0:085749c8446f	915	sum = dir[LDIR_Chksum];
emh203	0:085749c8446f	916	c &= 0xBF; ord = c;
emh203	0:085749c8446f	917	dj->lfn_idx = dj->index;
emh203	0:085749c8446f	918	}
emh203	0:085749c8446f	919	/* Check LFN validity and capture it */
emh203	0:085749c8446f	920	ord = (c == ord && sum == dir[LDIR_Chksum] && pick_lfn(dj->lfn, dir)) ? ord - 1 : 0xFF;
emh203	0:085749c8446f	921	} else { /* An SFN entry is found */
emh203	0:085749c8446f	922	if (ord \|\| sum != sum_sfn(dir)) /* Is there a valid LFN? */
emh203	0:085749c8446f	923	dj->lfn_idx = 0xFFFF; /* It has no LFN. */
emh203	0:085749c8446f	924	break;
emh203	0:085749c8446f	925	}
emh203	0:085749c8446f	926	}
emh203	0:085749c8446f	927	#else /* Non LFN configuration */
emh203	0:085749c8446f	928	if (c != 0xE5 && (_FS_RPATH \|\| c != '.') && !(dir[DIR_Attr] & AM_VOL)) /* Is it a valid entry? */
emh203	0:085749c8446f	929	break;
emh203	0:085749c8446f	930	#endif
emh203	0:085749c8446f	931	res = dir_next(dj, FALSE); /* Next entry */
emh203	0:085749c8446f	932	if (res != FR_OK) break;
emh203	0:085749c8446f	933	}
emh203	0:085749c8446f	934
emh203	0:085749c8446f	935	if (res != FR_OK) dj->sect = 0;
emh203	0:085749c8446f	936
emh203	0:085749c8446f	937	return res;
emh203	0:085749c8446f	938	}
emh203	0:085749c8446f	939	#endif
emh203	0:085749c8446f	940
emh203	0:085749c8446f	941
emh203	0:085749c8446f	942
emh203	0:085749c8446f	943	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	944	/* Register an object to the directory */
emh203	0:085749c8446f	945	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	946	#if !_FS_READONLY
emh203	0:085749c8446f	947	static
emh203	0:085749c8446f	948	FRESULT dir_register ( /* FR_OK:Successful, FR_DENIED:No free entry or too many SFN collision, FR_DISK_ERR:Disk error */
emh203	0:085749c8446f	949	eDIR dj / Target directory with object name to be created */
emh203	0:085749c8446f	950	)
emh203	0:085749c8446f	951	{
emh203	0:085749c8446f	952	FRESULT res;
emh203	0:085749c8446f	953	BYTE c, *dir;
emh203	0:085749c8446f	954	#if _USE_LFN /* LFN configuration */
emh203	0:085749c8446f	955	WORD n, ne, is;
emh203	0:085749c8446f	956	BYTE sn[12], *fn, sum;
emh203	0:085749c8446f	957	WCHAR *lfn;
emh203	0:085749c8446f	958
emh203	0:085749c8446f	959
emh203	0:085749c8446f	960	fn = dj->fn; lfn = dj->lfn;
emh203	0:085749c8446f	961	mem_cpy(sn, fn, 12);
emh203	0:085749c8446f	962
emh203	0:085749c8446f	963	if (_FS_RPATH && (sn[NS] & NS_DOT)) return FR_INVALID_NAME; /* Cannot create dot entry */
emh203	0:085749c8446f	964
emh203	0:085749c8446f	965	if (sn[NS] & NS_LOSS) { /* When LFN is out of 8.3 format, generate a numbered name */
emh203	0:085749c8446f	966	fn[NS] = 0; dj->lfn = NULL; /* Find only SFN */
emh203	0:085749c8446f	967	for (n = 1; n < 100; n++) {
emh203	0:085749c8446f	968	gen_numname(fn, sn, lfn, n); /* Generate a numbered name */
emh203	0:085749c8446f	969	res = dir_find(dj); /* Check if the name collides with existing SFN */
emh203	0:085749c8446f	970	if (res != FR_OK) break;
emh203	0:085749c8446f	971	}
emh203	0:085749c8446f	972	if (n == 100) return FR_DENIED; /* Abort if too many collisions */
emh203	0:085749c8446f	973	if (res != FR_NO_FILE) return res; /* Abort if the result is other than 'not collided' */
emh203	0:085749c8446f	974	fn[NS] = sn[NS]; dj->lfn = lfn;
emh203	0:085749c8446f	975	}
emh203	0:085749c8446f	976
emh203	0:085749c8446f	977	if (sn[NS] & NS_LFN) { /* When LFN is to be created, reserve reserve an SFN + LFN entries. */
emh203	0:085749c8446f	978	for (ne = 0; lfn[ne]; ne++) ;
emh203	0:085749c8446f	979	ne = (ne + 25) / 13;
emh203	0:085749c8446f	980	} else { /* Otherwise reserve only an SFN entry. */
emh203	0:085749c8446f	981	ne = 1;
emh203	0:085749c8446f	982	}
emh203	0:085749c8446f	983
emh203	0:085749c8446f	984	/* Reserve contiguous entries */
emh203	0:085749c8446f	985	res = dir_seek(dj, 0);
emh203	0:085749c8446f	986	if (res != FR_OK) return res;
emh203	0:085749c8446f	987	n = is = 0;
emh203	0:085749c8446f	988	do {
emh203	0:085749c8446f	989	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	990	if (res != FR_OK) break;
emh203	0:085749c8446f	991	c = dj->dir; / Check the entry status */
emh203	0:085749c8446f	992	if (c == 0xE5 \|\| c == 0) { /* Is it a blank entry? */
emh203	0:085749c8446f	993	if (n == 0) is = dj->index; /* First index of the contigulus entry */
emh203	0:085749c8446f	994	if (++n == ne) break; /* A contiguous entry that requiered count is found */
emh203	0:085749c8446f	995	} else {
emh203	0:085749c8446f	996	n = 0; /* Not a blank entry. Restart to search */
emh203	0:085749c8446f	997	}
emh203	0:085749c8446f	998	res = dir_next(dj, TRUE); /* Next entry with table streach */
emh203	0:085749c8446f	999	} while (res == FR_OK);
emh203	0:085749c8446f	1000
emh203	0:085749c8446f	1001	if (res == FR_OK && ne > 1) { /* Initialize LFN entry if needed */
emh203	0:085749c8446f	1002	res = dir_seek(dj, is);
emh203	0:085749c8446f	1003	if (res == FR_OK) {
emh203	0:085749c8446f	1004	sum = sum_sfn(dj->fn); /* Sum of the SFN tied to the LFN */
emh203	0:085749c8446f	1005	ne--;
emh203	0:085749c8446f	1006	do { /* Store LFN entries in bottom first */
emh203	0:085749c8446f	1007	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	1008	if (res != FR_OK) break;
emh203	0:085749c8446f	1009	fit_lfn(dj->lfn, dj->dir, (BYTE)ne, sum);
emh203	0:085749c8446f	1010	dj->fs->wflag = 1;
emh203	0:085749c8446f	1011	res = dir_next(dj, FALSE); /* Next entry */
emh203	0:085749c8446f	1012	} while (res == FR_OK && --ne);
emh203	0:085749c8446f	1013	}
emh203	0:085749c8446f	1014	}
emh203	0:085749c8446f	1015
emh203	0:085749c8446f	1016	#else /* Non LFN configuration */
emh203	0:085749c8446f	1017	res = dir_seek(dj, 0);
emh203	0:085749c8446f	1018	if (res == FR_OK) {
emh203	0:085749c8446f	1019	do { /* Find a blank entry for the SFN */
emh203	0:085749c8446f	1020	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	1021	if (res != FR_OK) break;
emh203	0:085749c8446f	1022	c = *dj->dir;
emh203	0:085749c8446f	1023	if (c == 0xE5 \|\| c == 0) break; /* Is it a blank entry? */
emh203	0:085749c8446f	1024	res = dir_next(dj, TRUE); /* Next entry with table streach */
emh203	0:085749c8446f	1025	} while (res == FR_OK);
emh203	0:085749c8446f	1026	}
emh203	0:085749c8446f	1027	#endif
emh203	0:085749c8446f	1028
emh203	0:085749c8446f	1029	if (res == FR_OK) { /* Initialize the SFN entry */
emh203	0:085749c8446f	1030	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	1031	if (res == FR_OK) {
emh203	0:085749c8446f	1032	dir = dj->dir;
emh203	0:085749c8446f	1033	mem_set(dir, 0, 32); /* Clean the entry */
emh203	0:085749c8446f	1034	mem_cpy(dir, dj->fn, 11); /* Put SFN */
emh203	0:085749c8446f	1035	dir[DIR_NTres] = (dj->fn+NS) & (NS_BODY \| NS_EXT); / Put NT flag */
emh203	0:085749c8446f	1036	dj->fs->wflag = 1;
emh203	0:085749c8446f	1037	}
emh203	0:085749c8446f	1038	}
emh203	0:085749c8446f	1039
emh203	0:085749c8446f	1040	return res;
emh203	0:085749c8446f	1041	}
emh203	0:085749c8446f	1042	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	1043
emh203	0:085749c8446f	1044
emh203	0:085749c8446f	1045
emh203	0:085749c8446f	1046
emh203	0:085749c8446f	1047	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1048	/* Remove an object from the directory */
emh203	0:085749c8446f	1049	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1050	#if !_FS_READONLY && !_FS_MINIMIZE
emh203	0:085749c8446f	1051	static
emh203	0:085749c8446f	1052	FRESULT dir_remove ( /* FR_OK: Successful, FR_DISK_ERR: A disk error */
emh203	0:085749c8446f	1053	eDIR dj / Directory object pointing the entry to be removed */
emh203	0:085749c8446f	1054	)
emh203	0:085749c8446f	1055	{
emh203	0:085749c8446f	1056	FRESULT res;
emh203	0:085749c8446f	1057	#if _USE_LFN /* LFN configuration */
emh203	0:085749c8446f	1058	WORD i;
emh203	0:085749c8446f	1059
emh203	0:085749c8446f	1060	i = dj->index; /* SFN index */
emh203	0:085749c8446f	1061	res = dir_seek(dj, (WORD)((dj->lfn_idx == 0xFFFF) ? i : dj->lfn_idx)); /* Goto the SFN or top of the LFN entries */
emh203	0:085749c8446f	1062	if (res == FR_OK) {
emh203	0:085749c8446f	1063	do {
emh203	0:085749c8446f	1064	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	1065	if (res != FR_OK) break;
emh203	0:085749c8446f	1066	dj->dir = 0xE5; / Mark the entry "deleted" */
emh203	0:085749c8446f	1067	dj->fs->wflag = 1;
emh203	0:085749c8446f	1068	if (dj->index >= i) break; /* When reached SFN, all entries of the object has been deleted. */
emh203	0:085749c8446f	1069	res = dir_next(dj, FALSE); /* Next entry */
emh203	0:085749c8446f	1070	} while (res == FR_OK);
emh203	0:085749c8446f	1071	if (res == FR_NO_FILE) res = FR_INT_ERR;
emh203	0:085749c8446f	1072	}
emh203	0:085749c8446f	1073
emh203	0:085749c8446f	1074	#else /* Non LFN configuration */
emh203	0:085749c8446f	1075	res = dir_seek(dj, dj->index);
emh203	0:085749c8446f	1076	if (res == FR_OK) {
emh203	0:085749c8446f	1077	res = move_window(dj->fs, dj->sect);
emh203	0:085749c8446f	1078	if (res == FR_OK) {
emh203	0:085749c8446f	1079	dj->dir = 0xE5; / Mark the entry "deleted" */
emh203	0:085749c8446f	1080	dj->fs->wflag = 1;
emh203	0:085749c8446f	1081	}
emh203	0:085749c8446f	1082	}
emh203	0:085749c8446f	1083	#endif
emh203	0:085749c8446f	1084
emh203	0:085749c8446f	1085	return res;
emh203	0:085749c8446f	1086	}
emh203	0:085749c8446f	1087	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	1088
emh203	0:085749c8446f	1089
emh203	0:085749c8446f	1090
emh203	0:085749c8446f	1091
emh203	0:085749c8446f	1092	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1093	/* Pick a segment and create the object name in directory form */
emh203	0:085749c8446f	1094	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1095
emh203	0:085749c8446f	1096	static
emh203	0:085749c8446f	1097	FRESULT create_name (
emh203	0:085749c8446f	1098	eDIR dj, / Pointer to the directory object */
emh203	0:085749c8446f	1099	const XCHAR *path / Pointer to pointer to the segment in the path string */
emh203	0:085749c8446f	1100	)
emh203	0:085749c8446f	1101	{
emh203	0:085749c8446f	1102	#ifdef _EXCVT
emh203	0:085749c8446f	1103	static const BYTE cvt[] = _EXCVT;
emh203	0:085749c8446f	1104	#endif
emh203	0:085749c8446f	1105
emh203	0:085749c8446f	1106	#if _USE_LFN /* LFN configuration */
emh203	0:085749c8446f	1107	BYTE b, cf;
emh203	0:085749c8446f	1108	WCHAR w, *lfn;
emh203	0:085749c8446f	1109	int i, ni, si, di;
emh203	0:085749c8446f	1110	const XCHAR *p;
emh203	0:085749c8446f	1111
emh203	0:085749c8446f	1112	/* Create LFN in Unicode */
emh203	0:085749c8446f	1113	si = di = 0;
emh203	0:085749c8446f	1114	p = *path;
emh203	0:085749c8446f	1115	lfn = dj->lfn;
emh203	0:085749c8446f	1116	for (;;) {
emh203	0:085749c8446f	1117	w = p[si++]; /* Get a character */
emh203	0:085749c8446f	1118	if (w < ' ' \|\| w == '/' \|\| w == '\\') break; /* Break on end of segment */
emh203	0:085749c8446f	1119	if (di >= _MAX_LFN) /* Reject too long name */
emh203	0:085749c8446f	1120	return FR_INVALID_NAME;
emh203	0:085749c8446f	1121	#if !_LFN_UNICODE
emh203	0:085749c8446f	1122	w &= 0xFF;
emh203	0:085749c8446f	1123	if (IsDBCS1(w)) { /* If it is a DBC 1st byte */
emh203	0:085749c8446f	1124	b = p[si++]; /* Get 2nd byte */
emh203	0:085749c8446f	1125	if (!IsDBCS2(b)) /* Reject invalid code for DBC */
emh203	0:085749c8446f	1126	return FR_INVALID_NAME;
emh203	0:085749c8446f	1127	w = (w << 8) + b;
emh203	0:085749c8446f	1128	}
emh203	0:085749c8446f	1129	w = ff_convert(w, 1); /* Convert OEM to Unicode */
emh203	0:085749c8446f	1130	if (!w) return FR_INVALID_NAME; /* Reject invalid code */
emh203	0:085749c8446f	1131	#endif
emh203	0:085749c8446f	1132	if (w < 0x80 && chk_chr("\":<>\?\|\x7F", w)) / Reject illegal chars for LFN */
emh203	0:085749c8446f	1133	return FR_INVALID_NAME;
emh203	0:085749c8446f	1134	lfn[di++] = w; /* Store the Unicode char */
emh203	0:085749c8446f	1135	}
emh203	0:085749c8446f	1136	path = &p[si]; / Rerurn pointer to the next segment */
emh203	0:085749c8446f	1137	cf = (w < ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
emh203	0:085749c8446f	1138	#if _FS_RPATH
emh203	0:085749c8446f	1139	if ((di == 1 && lfn[di - 1] == '.') \|\| /* Is this a dot entry? */
emh203	0:085749c8446f	1140	(di == 2 && lfn[di - 1] == '.' && lfn[di - 2] == '.')) {
emh203	0:085749c8446f	1141	lfn[di] = 0;
emh203	0:085749c8446f	1142	for (i = 0; i < 11; i++)
emh203	0:085749c8446f	1143	dj->fn[i] = (i < di) ? '.' : ' ';
emh203	0:085749c8446f	1144	dj->fn[i] = cf \| NS_DOT; /* This is a dot entry */
emh203	0:085749c8446f	1145	return FR_OK;
emh203	0:085749c8446f	1146	}
emh203	0:085749c8446f	1147	#endif
emh203	0:085749c8446f	1148	while (di) { /* Strip trailing spaces and dots */
emh203	0:085749c8446f	1149	w = lfn[di - 1];
emh203	0:085749c8446f	1150	if (w != ' ' && w != '.') break;
emh203	0:085749c8446f	1151	di--;
emh203	0:085749c8446f	1152	}
emh203	0:085749c8446f	1153	if (!di) return FR_INVALID_NAME; /* Reject null string */
emh203	0:085749c8446f	1154
emh203	0:085749c8446f	1155	lfn[di] = 0; /* LFN is created */
emh203	0:085749c8446f	1156
emh203	0:085749c8446f	1157	/* Create SFN in directory form */
emh203	0:085749c8446f	1158	mem_set(dj->fn, ' ', 11);
emh203	0:085749c8446f	1159	for (si = 0; lfn[si] == ' ' \|\| lfn[si] == '.'; si++) ; /* Strip leading spaces and dots */
emh203	0:085749c8446f	1160	if (si) cf \|= NS_LOSS \| NS_LFN;
emh203	0:085749c8446f	1161	while (di && lfn[di - 1] != '.') di--; /* Find extension (di<=si: no extension) */
emh203	0:085749c8446f	1162
emh203	0:085749c8446f	1163	b = i = 0; ni = 8;
emh203	0:085749c8446f	1164	for (;;) {
emh203	0:085749c8446f	1165	w = lfn[si++]; /* Get an LFN char */
emh203	0:085749c8446f	1166	if (!w) break; /* Break on enf of the LFN */
emh203	0:085749c8446f	1167	if (w == ' ' \|\| (w == '.' && si != di)) { /* Remove spaces and dots */
emh203	0:085749c8446f	1168	cf \|= NS_LOSS \| NS_LFN; continue;
emh203	0:085749c8446f	1169	}
emh203	0:085749c8446f	1170
emh203	0:085749c8446f	1171	if (i >= ni \|\| si == di) { /* Extension or end of SFN */
emh203	0:085749c8446f	1172	if (ni == 11) { /* Long extension */
emh203	0:085749c8446f	1173	cf \|= NS_LOSS \| NS_LFN; break;
emh203	0:085749c8446f	1174	}
emh203	0:085749c8446f	1175	if (si != di) cf \|= NS_LOSS \| NS_LFN; /* Out of 8.3 format */
emh203	0:085749c8446f	1176	if (si > di) break; /* No extension */
emh203	0:085749c8446f	1177	si = di; i = 8; ni = 11; /* Enter extension section */
emh203	0:085749c8446f	1178	b <<= 2; continue;
emh203	0:085749c8446f	1179	}
emh203	0:085749c8446f	1180
emh203	0:085749c8446f	1181	if (w >= 0x80) { /* Non ASCII char */
emh203	0:085749c8446f	1182	#ifdef _EXCVT
emh203	0:085749c8446f	1183	w = ff_convert(w, 0); /* Unicode -> OEM code */
emh203	0:085749c8446f	1184	if (w) w = cvt[w - 0x80]; /* Convert extended char to upper (SBCS) */
emh203	0:085749c8446f	1185	#else
emh203	0:085749c8446f	1186	w = ff_convert(ff_wtoupper(w), 0); /* Upper converted Unicode -> OEM code */
emh203	0:085749c8446f	1187	#endif
emh203	0:085749c8446f	1188	cf \|= NS_LFN; /* Force create LFN entry */
emh203	0:085749c8446f	1189	}
emh203	0:085749c8446f	1190
emh203	0:085749c8446f	1191	if (_DF1S && w >= 0x100) { /* Double byte char */
emh203	0:085749c8446f	1192	if (i >= ni - 1) {
emh203	0:085749c8446f	1193	cf \|= NS_LOSS \| NS_LFN; i = ni; continue;
emh203	0:085749c8446f	1194	}
emh203	0:085749c8446f	1195	dj->fn[i++] = (BYTE)(w >> 8);
emh203	0:085749c8446f	1196	} else { /* Single byte char */
emh203	0:085749c8446f	1197	if (!w \|\| chk_chr("+,;[=]", w)) { /* Replace illegal chars for SFN */
emh203	0:085749c8446f	1198	w = '_'; cf \|= NS_LOSS \| NS_LFN; /* Lossy conversion */
emh203	0:085749c8446f	1199	} else {
emh203	0:085749c8446f	1200	if (IsUpper(w)) { /* ASCII large capital */
emh203	0:085749c8446f	1201	b \|= 2;
emh203	0:085749c8446f	1202	} else {
emh203	0:085749c8446f	1203	if (IsLower(w)) { /* ASCII small capital */
emh203	0:085749c8446f	1204	b \|= 1; w -= 0x20;
emh203	0:085749c8446f	1205	}
emh203	0:085749c8446f	1206	}
emh203	0:085749c8446f	1207	}
emh203	0:085749c8446f	1208	}
emh203	0:085749c8446f	1209	dj->fn[i++] = (BYTE)w;
emh203	0:085749c8446f	1210	}
emh203	0:085749c8446f	1211
emh203	0:085749c8446f	1212	if (dj->fn[0] == 0xE5) dj->fn[0] = 0x05; /* If the first char collides with deleted mark, replace it with 0x05 */
emh203	0:085749c8446f	1213
emh203	0:085749c8446f	1214	if (ni == 8) b <<= 2;
emh203	0:085749c8446f	1215	if ((b & 0x0C) == 0x0C \|\| (b & 0x03) == 0x03) /* Create LFN entry when there are composite capitals */
emh203	0:085749c8446f	1216	cf \|= NS_LFN;
emh203	0:085749c8446f	1217	if (!(cf & NS_LFN)) { /* When LFN is in 8.3 format without extended char, NT flags are created */
emh203	0:085749c8446f	1218	if ((b & 0x03) == 0x01) cf \|= NS_EXT; /* NT flag (Extension has only small capital) */
emh203	0:085749c8446f	1219	if ((b & 0x0C) == 0x04) cf \|= NS_BODY; /* NT flag (Filename has only small capital) */
emh203	0:085749c8446f	1220	}
emh203	0:085749c8446f	1221
emh203	0:085749c8446f	1222	dj->fn[NS] = cf; /* SFN is created */
emh203	0:085749c8446f	1223
emh203	0:085749c8446f	1224	return FR_OK;
emh203	0:085749c8446f	1225
emh203	0:085749c8446f	1226
emh203	0:085749c8446f	1227	#else /* Non-LFN configuration */
emh203	0:085749c8446f	1228	BYTE b, c, d, *sfn;
emh203	0:085749c8446f	1229	int ni, si, i;
emh203	0:085749c8446f	1230	const char *p;
emh203	0:085749c8446f	1231
emh203	0:085749c8446f	1232	/* Create file name in directory form */
emh203	0:085749c8446f	1233	sfn = dj->fn;
emh203	0:085749c8446f	1234	mem_set(sfn, ' ', 11);
emh203	0:085749c8446f	1235	si = i = b = 0; ni = 8;
emh203	0:085749c8446f	1236	p = *path;
emh203	0:085749c8446f	1237	#if _FS_RPATH
emh203	0:085749c8446f	1238	if (p[si] == '.') { /* Is this a dot entry? */
emh203	0:085749c8446f	1239	for (;;) {
emh203	0:085749c8446f	1240	c = p[si++];
emh203	0:085749c8446f	1241	if (c != '.' \|\| si >= 3) break;
emh203	0:085749c8446f	1242	sfn[i++] = c;
emh203	0:085749c8446f	1243	}
emh203	0:085749c8446f	1244	if (c != '/' && c != '\\' && c > ' ') return FR_INVALID_NAME;
emh203	0:085749c8446f	1245	path = &p[si]; / Rerurn pointer to the next segment */
emh203	0:085749c8446f	1246	sfn[NS] = (c <= ' ') ? NS_LAST \| NS_DOT : NS_DOT; /* Set last segment flag if end of path */
emh203	0:085749c8446f	1247	return FR_OK;
emh203	0:085749c8446f	1248	}
emh203	0:085749c8446f	1249	#endif
emh203	0:085749c8446f	1250	for (;;) {
emh203	0:085749c8446f	1251	c = p[si++];
emh203	0:085749c8446f	1252	if (c <= ' ' \|\| c == '/' \|\| c == '\\') break; /* Break on end of segment */
emh203	0:085749c8446f	1253	if (c == '.' \|\| i >= ni) {
emh203	0:085749c8446f	1254	if (ni != 8 \|\| c != '.') return FR_INVALID_NAME;
emh203	0:085749c8446f	1255	i = 8; ni = 11;
emh203	0:085749c8446f	1256	b <<= 2; continue;
emh203	0:085749c8446f	1257	}
emh203	0:085749c8446f	1258	if (c >= 0x80) { /* Extended char */
emh203	0:085749c8446f	1259	#ifdef _EXCVT
emh203	0:085749c8446f	1260	c = cvt[c - 0x80]; /* Convert extend char (SBCS) */
emh203	0:085749c8446f	1261	#else
emh203	0:085749c8446f	1262	b \|= 3; /* Eliminate NT flag if ext char is exist */
emh203	0:085749c8446f	1263	#if !_DF1S /* ASCII only cfg */
emh203	0:085749c8446f	1264	return FR_INVALID_NAME;
emh203	0:085749c8446f	1265	#endif
emh203	0:085749c8446f	1266	#endif
emh203	0:085749c8446f	1267	}
emh203	0:085749c8446f	1268	if (IsDBCS1(c)) { /* DBC 1st byte? */
emh203	0:085749c8446f	1269	d = p[si++]; /* Get 2nd byte */
emh203	0:085749c8446f	1270	if (!IsDBCS2(d) \|\| i >= ni - 1) /* Reject invalid DBC */
emh203	0:085749c8446f	1271	return FR_INVALID_NAME;
emh203	0:085749c8446f	1272	sfn[i++] = c;
emh203	0:085749c8446f	1273	sfn[i++] = d;
emh203	0:085749c8446f	1274	} else { /* Single byte code */
emh203	0:085749c8446f	1275	if (chk_chr(" \"+,[=]\|\x7F", c)) / Reject illegal chrs for SFN */
emh203	0:085749c8446f	1276	return FR_INVALID_NAME;
emh203	0:085749c8446f	1277	if (IsUpper(c)) { /* ASCII large capital? */
emh203	0:085749c8446f	1278	b \|= 2;
emh203	0:085749c8446f	1279	} else {
emh203	0:085749c8446f	1280	if (IsLower(c)) { /* ASCII small capital? */
emh203	0:085749c8446f	1281	b \|= 1; c -= 0x20;
emh203	0:085749c8446f	1282	}
emh203	0:085749c8446f	1283	}
emh203	0:085749c8446f	1284	sfn[i++] = c;
emh203	0:085749c8446f	1285	}
emh203	0:085749c8446f	1286	}
emh203	0:085749c8446f	1287	path = &p[si]; / Rerurn pointer to the next segment */
emh203	0:085749c8446f	1288	c = (c <= ' ') ? NS_LAST : 0; /* Set last segment flag if end of path */
emh203	0:085749c8446f	1289
emh203	0:085749c8446f	1290	if (!i) return FR_INVALID_NAME; /* Reject null string */
emh203	0:085749c8446f	1291	if (sfn[0] == 0xE5) sfn[0] = 0x05; /* When first char collides with 0xE5, replace it with 0x05 */
emh203	0:085749c8446f	1292
emh203	0:085749c8446f	1293	if (ni == 8) b <<= 2;
emh203	0:085749c8446f	1294	if ((b & 0x03) == 0x01) c \|= NS_EXT; /* NT flag (Extension has only small capital) */
emh203	0:085749c8446f	1295	if ((b & 0x0C) == 0x04) c \|= NS_BODY; /* NT flag (Filename has only small capital) */
emh203	0:085749c8446f	1296
emh203	0:085749c8446f	1297	sfn[NS] = c; /* Store NT flag, File name is created */
emh203	0:085749c8446f	1298
emh203	0:085749c8446f	1299	return FR_OK;
emh203	0:085749c8446f	1300	#endif
emh203	0:085749c8446f	1301	}
emh203	0:085749c8446f	1302
emh203	0:085749c8446f	1303
emh203	0:085749c8446f	1304
emh203	0:085749c8446f	1305
emh203	0:085749c8446f	1306	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1307	/* Get file information from directory entry */
emh203	0:085749c8446f	1308	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1309	#if _FS_MINIMIZE <= 1
emh203	0:085749c8446f	1310	static
emh203	0:085749c8446f	1311	void get_fileinfo ( /* No return code */
emh203	0:085749c8446f	1312	eDIR dj, / Pointer to the directory object */
emh203	0:085749c8446f	1313	FILINFO fno / Pointer to the file information to be filled */
emh203	0:085749c8446f	1314	)
emh203	0:085749c8446f	1315	{
emh203	0:085749c8446f	1316	int i;
emh203	0:085749c8446f	1317	BYTE c, nt, *dir;
emh203	0:085749c8446f	1318	char *p;
emh203	0:085749c8446f	1319
emh203	0:085749c8446f	1320
emh203	0:085749c8446f	1321	p = fno->fname;
emh203	0:085749c8446f	1322	if (dj->sect) {
emh203	0:085749c8446f	1323	dir = dj->dir;
emh203	0:085749c8446f	1324	nt = dir[DIR_NTres]; /* NT flag */
emh203	0:085749c8446f	1325	for (i = 0; i < 8; i++) { /* Copy name body */
emh203	0:085749c8446f	1326	c = dir[i];
emh203	0:085749c8446f	1327	if (c == ' ') break;
emh203	0:085749c8446f	1328	if (c == 0x05) c = 0xE5;
emh203	0:085749c8446f	1329	if (_USE_LFN && (nt & NS_BODY) && IsUpper(c)) c += 0x20;
emh203	0:085749c8446f	1330	*p++ = c;
emh203	0:085749c8446f	1331	}
emh203	0:085749c8446f	1332	if (dir[8] != ' ') { /* Copy name extension */
emh203	0:085749c8446f	1333	*p++ = '.';
emh203	0:085749c8446f	1334	for (i = 8; i < 11; i++) {
emh203	0:085749c8446f	1335	c = dir[i];
emh203	0:085749c8446f	1336	if (c == ' ') break;
emh203	0:085749c8446f	1337	if (_USE_LFN && (nt & NS_EXT) && IsUpper(c)) c += 0x20;
emh203	0:085749c8446f	1338	*p++ = c;
emh203	0:085749c8446f	1339	}
emh203	0:085749c8446f	1340	}
emh203	0:085749c8446f	1341	fno->fattrib = dir[DIR_Attr]; /* Attribute */
emh203	0:085749c8446f	1342	fno->fsize = LD_DWORD(dir+DIR_FileSize); /* Size */
emh203	0:085749c8446f	1343	fno->fdate = LD_WORD(dir+DIR_WrtDate); /* Date */
emh203	0:085749c8446f	1344	fno->ftime = LD_WORD(dir+DIR_WrtTime); /* Time */
emh203	0:085749c8446f	1345	}
emh203	0:085749c8446f	1346	*p = 0;
emh203	0:085749c8446f	1347
emh203	0:085749c8446f	1348	#if _USE_LFN
emh203	0:085749c8446f	1349	if (fno->lfname) {
emh203	0:085749c8446f	1350	XCHAR *tp = fno->lfname;
emh203	0:085749c8446f	1351	WCHAR w, *lfn;
emh203	0:085749c8446f	1352
emh203	0:085749c8446f	1353	i = 0;
emh203	0:085749c8446f	1354	if (dj->sect && dj->lfn_idx != 0xFFFF) {/* Get LFN if available */
emh203	0:085749c8446f	1355	lfn = dj->lfn;
emh203	0:085749c8446f	1356	while ((w = lfn++) != 0) { / Get an LFN char */
emh203	0:085749c8446f	1357	#if !_LFN_UNICODE
emh203	0:085749c8446f	1358	w = ff_convert(w, 0); /* Unicode -> OEM conversion */
emh203	0:085749c8446f	1359	if (!w) { i = 0; break; } /* Could not convert, no LFN */
emh203	0:085749c8446f	1360	if (_DF1S && w >= 0x100) /* Put 1st byte if it is a DBC */
emh203	0:085749c8446f	1361	tp[i++] = (XCHAR)(w >> 8);
emh203	0:085749c8446f	1362	#endif
emh203	0:085749c8446f	1363	if (i >= fno->lfsize - 1) { i = 0; break; } /* Buffer overrun, no LFN */
emh203	0:085749c8446f	1364	tp[i++] = (XCHAR)w;
emh203	0:085749c8446f	1365	}
emh203	0:085749c8446f	1366	}
emh203	0:085749c8446f	1367	tp[i] = 0; /* Terminator */
emh203	0:085749c8446f	1368	}
emh203	0:085749c8446f	1369	#endif
emh203	0:085749c8446f	1370	}
emh203	0:085749c8446f	1371	#endif /* _FS_MINIMIZE <= 1 */
emh203	0:085749c8446f	1372
emh203	0:085749c8446f	1373
emh203	0:085749c8446f	1374
emh203	0:085749c8446f	1375
emh203	0:085749c8446f	1376	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1377	/* Follow a file path */
emh203	0:085749c8446f	1378	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1379
emh203	0:085749c8446f	1380	static
emh203	0:085749c8446f	1381	FRESULT follow_path ( /* FR_OK(0): successful, !=0: error code */
emh203	0:085749c8446f	1382	eDIR dj, / Directory object to return last directory and found object */
emh203	0:085749c8446f	1383	const XCHAR path / Full-path string to find a file or directory */
emh203	0:085749c8446f	1384	)
emh203	0:085749c8446f	1385	{
emh203	0:085749c8446f	1386	FRESULT res;
emh203	0:085749c8446f	1387	BYTE *dir, last;
emh203	0:085749c8446f	1388
emh203	0:085749c8446f	1389
emh203	0:085749c8446f	1390	while (!_USE_LFN && path == ' ') path++; / Skip leading spaces */
emh203	0:085749c8446f	1391	#if _FS_RPATH
emh203	0:085749c8446f	1392	if (path == '/' \|\| path == '\\') { /* There is a heading separator */
emh203	0:085749c8446f	1393	path++; dj->sclust = 0; /* Strip it and start from the root dir */
emh203	0:085749c8446f	1394	} else { /* No heading saparator */
emh203	0:085749c8446f	1395	dj->sclust = dj->fs->cdir; /* Start from the current dir */
emh203	0:085749c8446f	1396	}
emh203	0:085749c8446f	1397	#else
emh203	0:085749c8446f	1398	if (path == '/' \|\| path == '\\') /* Strip heading separator if exist */
emh203	0:085749c8446f	1399	path++;
emh203	0:085749c8446f	1400	dj->sclust = 0; /* Start from the root dir */
emh203	0:085749c8446f	1401	#endif
emh203	0:085749c8446f	1402
emh203	0:085749c8446f	1403	if ((UINT)path < ' ') { / Null path means the start directory itself */
emh203	0:085749c8446f	1404	res = dir_seek(dj, 0);
emh203	0:085749c8446f	1405	dj->dir = NULL;
emh203	0:085749c8446f	1406
emh203	0:085749c8446f	1407	} else { /* Follow path */
emh203	0:085749c8446f	1408	for (;;) {
emh203	0:085749c8446f	1409	res = create_name(dj, &path); /* Get a segment */
emh203	0:085749c8446f	1410	if (res != FR_OK) break;
emh203	0:085749c8446f	1411	res = dir_find(dj); /* Find it */
emh203	0:085749c8446f	1412	last = *(dj->fn+NS) & NS_LAST;
emh203	0:085749c8446f	1413	if (res != FR_OK) { /* Could not find the object */
emh203	0:085749c8446f	1414	if (res == FR_NO_FILE && !last)
emh203	0:085749c8446f	1415	res = FR_NO_PATH;
emh203	0:085749c8446f	1416	break;
emh203	0:085749c8446f	1417	}
emh203	0:085749c8446f	1418	if (last) break; /* Last segment match. Function completed. */
emh203	0:085749c8446f	1419	dir = dj->dir; /* There is next segment. Follow the sub directory */
emh203	0:085749c8446f	1420	if (!(dir[DIR_Attr] & AM_DIR)) { /* Cannot follow because it is a file */
emh203	0:085749c8446f	1421	res = FR_NO_PATH; break;
emh203	0:085749c8446f	1422	}
emh203	0:085749c8446f	1423	dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
emh203	0:085749c8446f	1424	}
emh203	0:085749c8446f	1425	}
emh203	0:085749c8446f	1426
emh203	0:085749c8446f	1427	return res;
emh203	0:085749c8446f	1428	}
emh203	0:085749c8446f	1429
emh203	0:085749c8446f	1430
emh203	0:085749c8446f	1431
emh203	0:085749c8446f	1432
emh203	0:085749c8446f	1433	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1434	/* Load boot record and check if it is an FAT boot record */
emh203	0:085749c8446f	1435	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1436
emh203	0:085749c8446f	1437	static
emh203	0:085749c8446f	1438	BYTE check_fs ( /* 0:The FAT boot record, 1:Valid boot record but not an FAT, 2:Not a boot record, 3:Error */
emh203	0:085749c8446f	1439	FATFS fs, / File system object */
emh203	0:085749c8446f	1440	DWORD sect /* Sector# (lba) to check if it is an FAT boot record or not */
emh203	0:085749c8446f	1441	)
emh203	0:085749c8446f	1442	{
emh203	0:085749c8446f	1443	if (disk_read(fs->drive, fs->win, sect, 1) != RES_OK) /* Load boot record */
emh203	0:085749c8446f	1444	return 3;
emh203	0:085749c8446f	1445	if (LD_WORD(&fs->win[BS_55AA]) != 0xAA55) /* Check record signature (always placed at offset 510 even if the sector size is >512) */
emh203	0:085749c8446f	1446	return 2;
emh203	0:085749c8446f	1447
emh203	0:085749c8446f	1448	if ((LD_DWORD(&fs->win[BS_FilSysType]) & 0xFFFFFF) == 0x544146) /* Check "FAT" string */
emh203	0:085749c8446f	1449	return 0;
emh203	0:085749c8446f	1450	if ((LD_DWORD(&fs->win[BS_FilSysType32]) & 0xFFFFFF) == 0x544146)
emh203	0:085749c8446f	1451	return 0;
emh203	0:085749c8446f	1452
emh203	0:085749c8446f	1453	return 1;
emh203	0:085749c8446f	1454	}
emh203	0:085749c8446f	1455
emh203	0:085749c8446f	1456
emh203	0:085749c8446f	1457
emh203	0:085749c8446f	1458
emh203	0:085749c8446f	1459	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1460	/* Make sure that the file system is valid */
emh203	0:085749c8446f	1461	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1462
emh203	0:085749c8446f	1463
emh203	0:085749c8446f	1464	FRESULT chk_mounted ( /* FR_OK(0): successful, !=0: any error occured */
emh203	0:085749c8446f	1465	const XCHAR *path, / Pointer to pointer to the path name (drive number) */
emh203	0:085749c8446f	1466	FATFS *rfs, / Pointer to pointer to the found file system object */
emh203	0:085749c8446f	1467	BYTE chk_wp /* !=0: Check media write protection for write access */
emh203	0:085749c8446f	1468	)
emh203	0:085749c8446f	1469	{
emh203	0:085749c8446f	1470	BYTE fmt, *tbl;
emh203	0:085749c8446f	1471	UINT vol;
emh203	0:085749c8446f	1472	DSTATUS stat;
emh203	0:085749c8446f	1473	DWORD bsect, fsize, tsect, mclst;
emh203	0:085749c8446f	1474	const XCHAR p = path;
emh203	0:085749c8446f	1475	FATFS *fs;
emh203	0:085749c8446f	1476
emh203	0:085749c8446f	1477	/* Get logical drive number from the path name */
emh203	0:085749c8446f	1478	vol = p[0] - '0'; /* Is there a drive number? */
emh203	0:085749c8446f	1479	if (vol <= 9 && p[1] == ':') { /* Found a drive number, get and strip it */
emh203	0:085749c8446f	1480	p += 2; path = p; / Return pointer to the path name */
emh203	0:085749c8446f	1481	} else { /* No drive number is given */
emh203	0:085749c8446f	1482	#if _FS_RPATH
emh203	0:085749c8446f	1483	vol = Drive; /* Use current drive */
emh203	0:085749c8446f	1484	#else
emh203	0:085749c8446f	1485	vol = 0; /* Use drive 0 */
emh203	0:085749c8446f	1486	#endif
emh203	0:085749c8446f	1487	}
emh203	0:085749c8446f	1488
emh203	0:085749c8446f	1489	/* Check if the logical drive is valid or not */
emh203	0:085749c8446f	1490	if (vol >= _DRIVES) /* Is the drive number valid? */
emh203	0:085749c8446f	1491	return FR_INVALID_DRIVE;
emh203	0:085749c8446f	1492	rfs = fs = FatFs[vol]; / Returen pointer to the corresponding file system object */
emh203	0:085749c8446f	1493	if (!fs) return FR_NOT_ENABLED; /* Is the file system object available? */
emh203	0:085749c8446f	1494
emh203	0:085749c8446f	1495	ENTER_FF(fs); /* Lock file system */
emh203	0:085749c8446f	1496
emh203	0:085749c8446f	1497	if (fs->fs_type) { /* If the logical drive has been mounted */
emh203	0:085749c8446f	1498	stat = disk_status(fs->drive);
emh203	0:085749c8446f	1499	if (!(stat & STA_NOINIT)) { /* and the physical drive is kept initialized (has not been changed), */
emh203	0:085749c8446f	1500	#if !_FS_READONLY
emh203	0:085749c8446f	1501	if (chk_wp && (stat & STA_PROTECT)) /* Check write protection if needed */
emh203	0:085749c8446f	1502	return FR_WRITE_PROTECTED;
emh203	0:085749c8446f	1503	#endif
emh203	0:085749c8446f	1504	return FR_OK; /* The file system object is valid */
emh203	0:085749c8446f	1505	}
emh203	0:085749c8446f	1506	}
emh203	0:085749c8446f	1507
emh203	0:085749c8446f	1508	/* The logical drive must be mounted. Following code attempts to mount the volume */
emh203	0:085749c8446f	1509
emh203	0:085749c8446f	1510	fs->fs_type = 0; /* Clear the file system object */
emh203	0:085749c8446f	1511	fs->drive = (BYTE)LD2PD(vol); /* Bind the logical drive and a physical drive */
emh203	0:085749c8446f	1512	stat = disk_initialize(fs->drive); /* Initialize low level disk I/O layer */
emh203	0:085749c8446f	1513	if (stat & STA_NOINIT) /* Check if the drive is ready */
emh203	0:085749c8446f	1514	return FR_NOT_READY;
emh203	0:085749c8446f	1515	#if _MAX_SS != 512 /* Get disk sector size if needed */
emh203	0:085749c8446f	1516	if (disk_ioctl(fs->drive, GET_SECTOR_SIZE, &SS(fs)) != RES_OK \|\| SS(fs) > _MAX_SS)
emh203	0:085749c8446f	1517	return FR_NO_FILESYSTEM;
emh203	0:085749c8446f	1518	#endif
emh203	0:085749c8446f	1519	#if !_FS_READONLY
emh203	0:085749c8446f	1520	if (chk_wp && (stat & STA_PROTECT)) /* Check disk write protection if needed */
emh203	0:085749c8446f	1521	return FR_WRITE_PROTECTED;
emh203	0:085749c8446f	1522	#endif
emh203	0:085749c8446f	1523	/* Search FAT partition on the drive */
emh203	0:085749c8446f	1524	fmt = check_fs(fs, bsect = 0); /* Check sector 0 as an SFD format */
emh203	0:085749c8446f	1525	if (fmt == 1) { /* Not an FAT boot record, it may be patitioned */
emh203	0:085749c8446f	1526	/* Check a partition listed in top of the partition table */
emh203	0:085749c8446f	1527	tbl = &fs->win[MBR_Table + LD2PT(vol) * 16]; /* Partition table */
emh203	0:085749c8446f	1528	if (tbl[4]) { /* Is the partition existing? */
emh203	0:085749c8446f	1529	bsect = LD_DWORD(&tbl[8]); /* Partition offset in LBA */
emh203	0:085749c8446f	1530	fmt = check_fs(fs, bsect); /* Check the partition */
emh203	0:085749c8446f	1531	}
emh203	0:085749c8446f	1532	}
emh203	0:085749c8446f	1533	if (fmt == 3) return FR_DISK_ERR;
emh203	0:085749c8446f	1534	if (fmt \|\| LD_WORD(fs->win+BPB_BytsPerSec) != SS(fs)) /* No valid FAT patition is found */
emh203	0:085749c8446f	1535	return FR_NO_FILESYSTEM;
emh203	0:085749c8446f	1536
emh203	0:085749c8446f	1537	/* Initialize the file system object */
emh203	0:085749c8446f	1538	fsize = LD_WORD(fs->win+BPB_FATSz16); /* Number of sectors per FAT */
emh203	0:085749c8446f	1539	if (!fsize) fsize = LD_DWORD(fs->win+BPB_FATSz32);
emh203	0:085749c8446f	1540	fs->sects_fat = fsize;
emh203	0:085749c8446f	1541	fs->n_fats = fs->win[BPB_NumFATs]; /* Number of FAT copies */
emh203	0:085749c8446f	1542	fsize = fs->n_fats; / (Number of sectors in FAT area) */
emh203	0:085749c8446f	1543	fs->fatbase = bsect + LD_WORD(fs->win+BPB_RsvdSecCnt); /* FAT start sector (lba) */
emh203	0:085749c8446f	1544	fs->csize = fs->win[BPB_SecPerClus]; /* Number of sectors per cluster */
emh203	0:085749c8446f	1545	fs->n_rootdir = LD_WORD(fs->win+BPB_RootEntCnt); /* Nmuber of root directory entries */
emh203	0:085749c8446f	1546	tsect = LD_WORD(fs->win+BPB_TotSec16); /* Number of sectors on the volume */
emh203	0:085749c8446f	1547	if (!tsect) tsect = LD_DWORD(fs->win+BPB_TotSec32);
emh203	0:085749c8446f	1548	fs->max_clust = mclst = (tsect /* Last cluster# + 1 (Number of clusters + 2) */
emh203	0:085749c8446f	1549	- LD_WORD(fs->win+BPB_RsvdSecCnt) - fsize - fs->n_rootdir / (SS(fs)/32)
emh203	0:085749c8446f	1550	) / fs->csize + 2;
emh203	0:085749c8446f	1551
emh203	0:085749c8446f	1552	fmt = FS_FAT12; /* Determine the FAT sub type */
emh203	0:085749c8446f	1553	if (mclst >= 0xFF7) fmt = FS_FAT16; /* Number of clusters >= 0xFF5 */
emh203	0:085749c8446f	1554	if (mclst >= 0xFFF7) fmt = FS_FAT32; /* Number of clusters >= 0xFFF5 */
emh203	0:085749c8446f	1555
emh203	0:085749c8446f	1556	if (fmt == FS_FAT32)
emh203	0:085749c8446f	1557	fs->dirbase = LD_DWORD(fs->win+BPB_RootClus); /* Root directory start cluster */
emh203	0:085749c8446f	1558	else
emh203	0:085749c8446f	1559	fs->dirbase = fs->fatbase + fsize; /* Root directory start sector (lba) */
emh203	0:085749c8446f	1560	fs->database = fs->fatbase + fsize + fs->n_rootdir / (SS(fs)/32); /* Data start sector (lba) */
emh203	0:085749c8446f	1561
emh203	0:085749c8446f	1562	#if !_FS_READONLY
emh203	0:085749c8446f	1563	/* Initialize allocation information */
emh203	0:085749c8446f	1564	fs->free_clust = 0xFFFFFFFF;
emh203	0:085749c8446f	1565	fs->wflag = 0;
emh203	0:085749c8446f	1566	/* Get fsinfo if needed */
emh203	0:085749c8446f	1567	if (fmt == FS_FAT32) {
emh203	0:085749c8446f	1568	fs->fsi_flag = 0;
emh203	0:085749c8446f	1569	fs->fsi_sector = bsect + LD_WORD(fs->win+BPB_FSInfo);
emh203	0:085749c8446f	1570	if (disk_read(fs->drive, fs->win, fs->fsi_sector, 1) == RES_OK &&
emh203	0:085749c8446f	1571	LD_WORD(fs->win+BS_55AA) == 0xAA55 &&
emh203	0:085749c8446f	1572	LD_DWORD(fs->win+FSI_LeadSig) == 0x41615252 &&
emh203	0:085749c8446f	1573	LD_DWORD(fs->win+FSI_StrucSig) == 0x61417272) {
emh203	0:085749c8446f	1574	fs->last_clust = LD_DWORD(fs->win+FSI_Nxt_Free);
emh203	0:085749c8446f	1575	fs->free_clust = LD_DWORD(fs->win+FSI_Free_Count);
emh203	0:085749c8446f	1576	}
emh203	0:085749c8446f	1577	}
emh203	0:085749c8446f	1578	#endif
emh203	0:085749c8446f	1579	fs->fs_type = fmt; /* FAT sub-type */
emh203	0:085749c8446f	1580	fs->winsect = 0; /* Invalidate sector cache */
emh203	0:085749c8446f	1581	#if _FS_RPATH
emh203	0:085749c8446f	1582	fs->cdir = 0; /* Current directory (root dir) */
emh203	0:085749c8446f	1583	#endif
emh203	0:085749c8446f	1584	fs->id = ++Fsid; /* File system mount ID */
emh203	0:085749c8446f	1585
emh203	0:085749c8446f	1586	return FR_OK;
emh203	0:085749c8446f	1587	}
emh203	0:085749c8446f	1588
emh203	0:085749c8446f	1589
emh203	0:085749c8446f	1590
emh203	0:085749c8446f	1591
emh203	0:085749c8446f	1592	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1593	/* Check if the file/dir object is valid or not */
emh203	0:085749c8446f	1594	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1595
emh203	0:085749c8446f	1596	static
emh203	0:085749c8446f	1597	FRESULT validate ( /* FR_OK(0): The object is valid, !=0: Invalid */
emh203	0:085749c8446f	1598	FATFS fs, / Pointer to the file system object */
emh203	0:085749c8446f	1599	WORD id /* Member id of the target object to be checked */
emh203	0:085749c8446f	1600	)
emh203	0:085749c8446f	1601	{
emh203	0:085749c8446f	1602	if (!fs \|\| !fs->fs_type \|\| fs->id != id)
emh203	0:085749c8446f	1603	return FR_INVALID_OBJECT;
emh203	0:085749c8446f	1604
emh203	0:085749c8446f	1605	ENTER_FF(fs); /* Lock file system */
emh203	0:085749c8446f	1606
emh203	0:085749c8446f	1607	if (disk_status(fs->drive) & STA_NOINIT)
emh203	0:085749c8446f	1608	return FR_NOT_READY;
emh203	0:085749c8446f	1609
emh203	0:085749c8446f	1610	return FR_OK;
emh203	0:085749c8446f	1611	}
emh203	0:085749c8446f	1612
emh203	0:085749c8446f	1613
emh203	0:085749c8446f	1614
emh203	0:085749c8446f	1615
emh203	0:085749c8446f	1616	/*--------------------------------------------------------------------------
emh203	0:085749c8446f	1617
emh203	0:085749c8446f	1618	Public Functions
emh203	0:085749c8446f	1619
emh203	0:085749c8446f	1620	--------------------------------------------------------------------------*/
emh203	0:085749c8446f	1621
emh203	0:085749c8446f	1622
emh203	0:085749c8446f	1623
emh203	0:085749c8446f	1624	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1625	/* Mount/Unmount a Locical Drive */
emh203	0:085749c8446f	1626	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1627
emh203	0:085749c8446f	1628	FRESULT f_mount (
emh203	0:085749c8446f	1629	BYTE vol, /* Logical drive number to be mounted/unmounted */
emh203	0:085749c8446f	1630	FATFS fs / Pointer to new file system object (NULL for unmount)*/
emh203	0:085749c8446f	1631	)
emh203	0:085749c8446f	1632	{
emh203	0:085749c8446f	1633	FATFS *rfs;
emh203	0:085749c8446f	1634
emh203	0:085749c8446f	1635
emh203	0:085749c8446f	1636	if (vol >= _DRIVES) /* Check if the drive number is valid */
emh203	0:085749c8446f	1637	return FR_INVALID_DRIVE;
emh203	0:085749c8446f	1638	rfs = FatFs[vol]; /* Get current fs object */
emh203	0:085749c8446f	1639
emh203	0:085749c8446f	1640	if (rfs) {
emh203	0:085749c8446f	1641	#if _FS_REENTRANT /* Discard sync object of the current volume */
emh203	0:085749c8446f	1642	if (!ff_del_syncobj(rfs->sobj)) return FR_INT_ERR;
emh203	0:085749c8446f	1643	#endif
emh203	0:085749c8446f	1644	rfs->fs_type = 0; /* Clear old fs object */
emh203	0:085749c8446f	1645	}
emh203	0:085749c8446f	1646
emh203	0:085749c8446f	1647	if (fs) {
emh203	0:085749c8446f	1648	fs->fs_type = 0; /* Clear new fs object */
emh203	0:085749c8446f	1649	#if _FS_REENTRANT /* Create sync object for the new volume */
emh203	0:085749c8446f	1650	if (!ff_cre_syncobj(vol, &fs->sobj)) return FR_INT_ERR;
emh203	0:085749c8446f	1651	#endif
emh203	0:085749c8446f	1652	}
emh203	0:085749c8446f	1653	FatFs[vol] = fs; /* Register new fs object */
emh203	0:085749c8446f	1654
emh203	0:085749c8446f	1655	return FR_OK;
emh203	0:085749c8446f	1656	}
emh203	0:085749c8446f	1657
emh203	0:085749c8446f	1658
emh203	0:085749c8446f	1659
emh203	0:085749c8446f	1660
emh203	0:085749c8446f	1661	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1662	/* Open or Create a File */
emh203	0:085749c8446f	1663	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1664
emh203	0:085749c8446f	1665	FRESULT f_open (
emh203	0:085749c8446f	1666	FIL fp, / Pointer to the blank file object */
emh203	0:085749c8446f	1667	const XCHAR path, / Pointer to the file name */
emh203	0:085749c8446f	1668	BYTE mode /* Access mode and file open mode flags */
emh203	0:085749c8446f	1669	)
emh203	0:085749c8446f	1670	{
emh203	0:085749c8446f	1671	FRESULT res;
emh203	0:085749c8446f	1672	eDIR dj;
emh203	0:085749c8446f	1673	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	1674	BYTE *dir;
emh203	0:085749c8446f	1675
emh203	0:085749c8446f	1676
emh203	0:085749c8446f	1677	fp->fs = NULL; /* Clear file object */
emh203	0:085749c8446f	1678	#if !_FS_READONLY
emh203	0:085749c8446f	1679	mode &= (FA_READ \| FA_WRITE \| FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW);
emh203	0:085749c8446f	1680	res = chk_mounted(&path, &dj.fs, (BYTE)(mode & (FA_WRITE \| FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW)));
emh203	0:085749c8446f	1681	#else
emh203	0:085749c8446f	1682	mode &= FA_READ;
emh203	0:085749c8446f	1683	res = chk_mounted(&path, &dj.fs, 0);
emh203	0:085749c8446f	1684	#endif
emh203	0:085749c8446f	1685	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	1686	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	1687	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	1688
emh203	0:085749c8446f	1689	#if !_FS_READONLY
emh203	0:085749c8446f	1690	/* Create or Open a file */
emh203	0:085749c8446f	1691	if (mode & (FA_CREATE_ALWAYS \| FA_OPEN_ALWAYS \| FA_CREATE_NEW)) {
emh203	0:085749c8446f	1692	DWORD ps, cl;
emh203	0:085749c8446f	1693
emh203	0:085749c8446f	1694	if (res != FR_OK) { /* No file, create new */
emh203	0:085749c8446f	1695	if (res == FR_NO_FILE) /* There is no file to open, create a new entry */
emh203	0:085749c8446f	1696	res = dir_register(&dj);
emh203	0:085749c8446f	1697	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	1698	mode \|= FA_CREATE_ALWAYS;
emh203	0:085749c8446f	1699	dir = dj.dir; /* Created entry (SFN entry) */
emh203	0:085749c8446f	1700	}
emh203	0:085749c8446f	1701	else { /* Any object is already existing */
emh203	0:085749c8446f	1702	if (mode & FA_CREATE_NEW) /* Cannot create new */
emh203	0:085749c8446f	1703	LEAVE_FF(dj.fs, FR_EXIST);
emh203	0:085749c8446f	1704	dir = dj.dir;
emh203	0:085749c8446f	1705	if (!dir \|\| (dir[DIR_Attr] & (AM_RDO \| AM_DIR))) /* Cannot overwrite it (R/O or DIR) */
emh203	0:085749c8446f	1706	LEAVE_FF(dj.fs, FR_DENIED);
emh203	0:085749c8446f	1707	if (mode & FA_CREATE_ALWAYS) { /* Resize it to zero on over write mode */
emh203	0:085749c8446f	1708	cl = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO); /* Get start cluster */
emh203	0:085749c8446f	1709	ST_WORD(dir+DIR_FstClusHI, 0); /* cluster = 0 */
emh203	0:085749c8446f	1710	ST_WORD(dir+DIR_FstClusLO, 0);
emh203	0:085749c8446f	1711	ST_DWORD(dir+DIR_FileSize, 0); /* size = 0 */
emh203	0:085749c8446f	1712	dj.fs->wflag = 1;
emh203	0:085749c8446f	1713	ps = dj.fs->winsect; /* Remove the cluster chain */
emh203	0:085749c8446f	1714	if (cl) {
emh203	0:085749c8446f	1715	res = remove_chain(dj.fs, cl);
emh203	0:085749c8446f	1716	if (res) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	1717	dj.fs->last_clust = cl - 1; /* Reuse the cluster hole */
emh203	0:085749c8446f	1718	}
emh203	0:085749c8446f	1719	res = move_window(dj.fs, ps);
emh203	0:085749c8446f	1720	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	1721	}
emh203	0:085749c8446f	1722	}
emh203	0:085749c8446f	1723	if (mode & FA_CREATE_ALWAYS) {
emh203	0:085749c8446f	1724	dir[DIR_Attr] = 0; /* Reset attribute */
emh203	0:085749c8446f	1725	ps = get_fattime();
emh203	0:085749c8446f	1726	ST_DWORD(dir+DIR_CrtTime, ps); /* Created time */
emh203	0:085749c8446f	1727	dj.fs->wflag = 1;
emh203	0:085749c8446f	1728	mode \|= FA__WRITTEN; /* Set file changed flag */
emh203	0:085749c8446f	1729	}
emh203	0:085749c8446f	1730	}
emh203	0:085749c8446f	1731	/* Open an existing file */
emh203	0:085749c8446f	1732	else {
emh203	0:085749c8446f	1733	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	1734	if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
emh203	0:085749c8446f	1735	dir = dj.dir;
emh203	0:085749c8446f	1736	if (!dir \|\| (dir[DIR_Attr] & AM_DIR)) /* It is a directory */
emh203	0:085749c8446f	1737	LEAVE_FF(dj.fs, FR_NO_FILE);
emh203	0:085749c8446f	1738	#if !_FS_READONLY
emh203	0:085749c8446f	1739	if ((mode & FA_WRITE) && (dir[DIR_Attr] & AM_RDO)) /* R/O violation */
emh203	0:085749c8446f	1740	LEAVE_FF(dj.fs, FR_DENIED);
emh203	0:085749c8446f	1741	}
emh203	0:085749c8446f	1742	fp->dir_sect = dj.fs->winsect; /* Pointer to the directory entry */
emh203	0:085749c8446f	1743	fp->dir_ptr = dj.dir;
emh203	0:085749c8446f	1744	#endif
emh203	0:085749c8446f	1745	fp->flag = mode; /* File access mode */
emh203	0:085749c8446f	1746	fp->org_clust = /* File start cluster */
emh203	0:085749c8446f	1747	((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
emh203	0:085749c8446f	1748	fp->fsize = LD_DWORD(dir+DIR_FileSize); /* File size */
emh203	0:085749c8446f	1749	fp->fptr = 0; fp->csect = 255; /* File pointer */
emh203	0:085749c8446f	1750	fp->dsect = 0;
emh203	0:085749c8446f	1751	fp->fs = dj.fs; fp->id = dj.fs->id; /* Owner file system object of the file */
emh203	0:085749c8446f	1752
emh203	0:085749c8446f	1753	LEAVE_FF(dj.fs, FR_OK);
emh203	0:085749c8446f	1754	}
emh203	0:085749c8446f	1755
emh203	0:085749c8446f	1756
emh203	0:085749c8446f	1757
emh203	0:085749c8446f	1758
emh203	0:085749c8446f	1759	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1760	/* Read File */
emh203	0:085749c8446f	1761	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1762
emh203	0:085749c8446f	1763	FRESULT f_read (
emh203	0:085749c8446f	1764	FIL fp, / Pointer to the file object */
emh203	0:085749c8446f	1765	void buff, / Pointer to data buffer */
emh203	0:085749c8446f	1766	UINT btr, /* Number of bytes to read */
emh203	0:085749c8446f	1767	UINT br / Pointer to number of bytes read */
emh203	0:085749c8446f	1768	)
emh203	0:085749c8446f	1769	{
emh203	0:085749c8446f	1770	FRESULT res;
emh203	0:085749c8446f	1771	DWORD clst, sect, remain;
emh203	0:085749c8446f	1772	UINT rcnt, cc;
emh203	0:085749c8446f	1773	BYTE rbuff = (BYTE )buff;
emh203	0:085749c8446f	1774
emh203	0:085749c8446f	1775
emh203	0:085749c8446f	1776	br = 0; / Initialize bytes read */
emh203	0:085749c8446f	1777
emh203	0:085749c8446f	1778	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	1779	if (res != FR_OK) LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	1780	if (fp->flag & FA__ERROR) /* Check abort flag */
emh203	0:085749c8446f	1781	LEAVE_FF(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1782	if (!(fp->flag & FA_READ)) /* Check access mode */
emh203	0:085749c8446f	1783	LEAVE_FF(fp->fs, FR_DENIED);
emh203	0:085749c8446f	1784	remain = fp->fsize - fp->fptr;
emh203	0:085749c8446f	1785	if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
emh203	0:085749c8446f	1786
emh203	0:085749c8446f	1787	for ( ; btr; /* Repeat until all data transferred */
emh203	0:085749c8446f	1788	rbuff += rcnt, fp->fptr += rcnt, *br += rcnt, btr -= rcnt) {
emh203	0:085749c8446f	1789	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
emh203	0:085749c8446f	1790	if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
emh203	0:085749c8446f	1791	clst = (fp->fptr == 0) ? /* On the top of the file? */
emh203	0:085749c8446f	1792	fp->org_clust : get_fat(fp->fs, fp->curr_clust);
emh203	0:085749c8446f	1793	if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1794	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1795	fp->curr_clust = clst; /* Update current cluster */
emh203	0:085749c8446f	1796	fp->csect = 0; /* Reset sector offset in the cluster */
emh203	0:085749c8446f	1797	}
emh203	0:085749c8446f	1798	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
emh203	0:085749c8446f	1799	if (!sect) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1800	sect += fp->csect;
emh203	0:085749c8446f	1801	cc = btr / SS(fp->fs); /* When remaining bytes >= sector size, */
emh203	0:085749c8446f	1802	if (cc) { /* Read maximum contiguous sectors directly */
emh203	0:085749c8446f	1803	if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
emh203	0:085749c8446f	1804	cc = fp->fs->csize - fp->csect;
emh203	0:085749c8446f	1805	if (disk_read(fp->fs->drive, rbuff, sect, (BYTE)cc) != RES_OK)
emh203	0:085749c8446f	1806	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1807	#if !_FS_READONLY && _FS_MINIMIZE <= 2
emh203	0:085749c8446f	1808	#if _FS_TINY
emh203	0:085749c8446f	1809	if (fp->fs->wflag && fp->fs->winsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
emh203	0:085749c8446f	1810	mem_cpy(rbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), fp->fs->win, SS(fp->fs));
emh203	0:085749c8446f	1811	#else
emh203	0:085749c8446f	1812	if ((fp->flag & FA__DIRTY) && fp->dsect - sect < cc) /* Replace one of the read sectors with cached data if it contains a dirty sector */
emh203	0:085749c8446f	1813	mem_cpy(rbuff + ((fp->dsect - sect) * SS(fp->fs)), fp->buf, SS(fp->fs));
emh203	0:085749c8446f	1814	#endif
emh203	0:085749c8446f	1815	#endif
emh203	0:085749c8446f	1816	fp->csect += (BYTE)cc; /* Next sector address in the cluster */
emh203	0:085749c8446f	1817	rcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
emh203	0:085749c8446f	1818	continue;
emh203	0:085749c8446f	1819	}
emh203	0:085749c8446f	1820	#if !_FS_TINY
emh203	0:085749c8446f	1821	#if !_FS_READONLY
emh203	0:085749c8446f	1822	if (fp->flag & FA__DIRTY) { /* Write sector I/O buffer if needed */
emh203	0:085749c8446f	1823	if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
emh203	0:085749c8446f	1824	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1825	fp->flag &= ~FA__DIRTY;
emh203	0:085749c8446f	1826	}
emh203	0:085749c8446f	1827	#endif
emh203	0:085749c8446f	1828	if (fp->dsect != sect) { /* Fill sector buffer with file data */
emh203	0:085749c8446f	1829	if (disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
emh203	0:085749c8446f	1830	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1831	}
emh203	0:085749c8446f	1832	#endif
emh203	0:085749c8446f	1833	fp->dsect = sect;
emh203	0:085749c8446f	1834	fp->csect++; /* Next sector address in the cluster */
emh203	0:085749c8446f	1835	}
emh203	0:085749c8446f	1836	rcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Get partial sector data from sector buffer */
emh203	0:085749c8446f	1837	if (rcnt > btr) rcnt = btr;
emh203	0:085749c8446f	1838	#if _FS_TINY
emh203	0:085749c8446f	1839	if (move_window(fp->fs, fp->dsect)) /* Move sector window */
emh203	0:085749c8446f	1840	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1841	mem_cpy(rbuff, &fp->fs->win[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
emh203	0:085749c8446f	1842	#else
emh203	0:085749c8446f	1843	mem_cpy(rbuff, &fp->buf[fp->fptr % SS(fp->fs)], rcnt); /* Pick partial sector */
emh203	0:085749c8446f	1844	#endif
emh203	0:085749c8446f	1845	}
emh203	0:085749c8446f	1846
emh203	0:085749c8446f	1847	LEAVE_FF(fp->fs, FR_OK);
emh203	0:085749c8446f	1848	}
emh203	0:085749c8446f	1849
emh203	0:085749c8446f	1850
emh203	0:085749c8446f	1851
emh203	0:085749c8446f	1852
emh203	0:085749c8446f	1853	#if !_FS_READONLY
emh203	0:085749c8446f	1854	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1855	/* Write File */
emh203	0:085749c8446f	1856	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1857
emh203	0:085749c8446f	1858	FRESULT f_write (
emh203	0:085749c8446f	1859	FIL fp, / Pointer to the file object */
emh203	0:085749c8446f	1860	const void buff, / Pointer to the data to be written */
emh203	0:085749c8446f	1861	UINT btw, /* Number of bytes to write */
emh203	0:085749c8446f	1862	UINT bw / Pointer to number of bytes written */
emh203	0:085749c8446f	1863	)
emh203	0:085749c8446f	1864	{
emh203	0:085749c8446f	1865	FRESULT res;
emh203	0:085749c8446f	1866	DWORD clst, sect;
emh203	0:085749c8446f	1867	UINT wcnt, cc;
emh203	0:085749c8446f	1868	const BYTE wbuff = (const BYTE )buff;
emh203	0:085749c8446f	1869
emh203	0:085749c8446f	1870
emh203	0:085749c8446f	1871	bw = 0; / Initialize bytes written */
emh203	0:085749c8446f	1872
emh203	0:085749c8446f	1873	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	1874	if (res != FR_OK) LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	1875	if (fp->flag & FA__ERROR) /* Check abort flag */
emh203	0:085749c8446f	1876	LEAVE_FF(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1877	if (!(fp->flag & FA_WRITE)) /* Check access mode */
emh203	0:085749c8446f	1878	LEAVE_FF(fp->fs, FR_DENIED);
emh203	0:085749c8446f	1879	if (fp->fsize + btw < fp->fsize) btw = 0; /* File size cannot reach 4GB */
emh203	0:085749c8446f	1880
emh203	0:085749c8446f	1881	for ( ; btw; /* Repeat until all data transferred */
emh203	0:085749c8446f	1882	wbuff += wcnt, fp->fptr += wcnt, *bw += wcnt, btw -= wcnt) {
emh203	0:085749c8446f	1883	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
emh203	0:085749c8446f	1884	if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
emh203	0:085749c8446f	1885	if (fp->fptr == 0) { /* On the top of the file? */
emh203	0:085749c8446f	1886	clst = fp->org_clust; /* Follow from the origin */
emh203	0:085749c8446f	1887	if (clst == 0) /* When there is no cluster chain, */
emh203	0:085749c8446f	1888	fp->org_clust = clst = create_chain(fp->fs, 0); /* Create a new cluster chain */
emh203	0:085749c8446f	1889	} else { /* Middle or end of the file */
emh203	0:085749c8446f	1890	clst = create_chain(fp->fs, fp->curr_clust); /* Follow or streach cluster chain */
emh203	0:085749c8446f	1891	}
emh203	0:085749c8446f	1892	if (clst == 0) break; /* Could not allocate a new cluster (disk full) */
emh203	0:085749c8446f	1893	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1894	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1895	fp->curr_clust = clst; /* Update current cluster */
emh203	0:085749c8446f	1896	fp->csect = 0; /* Reset sector address in the cluster */
emh203	0:085749c8446f	1897	}
emh203	0:085749c8446f	1898	#if _FS_TINY
emh203	0:085749c8446f	1899	if (fp->fs->winsect == fp->dsect && move_window(fp->fs, 0)) /* Write back data buffer prior to following direct transfer */
emh203	0:085749c8446f	1900	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1901	#else
emh203	0:085749c8446f	1902	if (fp->flag & FA__DIRTY) { /* Write back data buffer prior to following direct transfer */
emh203	0:085749c8446f	1903	if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
emh203	0:085749c8446f	1904	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1905	fp->flag &= ~FA__DIRTY;
emh203	0:085749c8446f	1906	}
emh203	0:085749c8446f	1907	#endif
emh203	0:085749c8446f	1908	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current sector */
emh203	0:085749c8446f	1909	if (!sect) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	1910	sect += fp->csect;
emh203	0:085749c8446f	1911	cc = btw / SS(fp->fs); /* When remaining bytes >= sector size, */
emh203	0:085749c8446f	1912	if (cc) { /* Write maximum contiguous sectors directly */
emh203	0:085749c8446f	1913	if (fp->csect + cc > fp->fs->csize) /* Clip at cluster boundary */
emh203	0:085749c8446f	1914	cc = fp->fs->csize - fp->csect;
emh203	0:085749c8446f	1915	if (disk_write(fp->fs->drive, wbuff, sect, (BYTE)cc) != RES_OK)
emh203	0:085749c8446f	1916	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1917	#if _FS_TINY
emh203	0:085749c8446f	1918	if (fp->fs->winsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
emh203	0:085749c8446f	1919	mem_cpy(fp->fs->win, wbuff + ((fp->fs->winsect - sect) * SS(fp->fs)), SS(fp->fs));
emh203	0:085749c8446f	1920	fp->fs->wflag = 0;
emh203	0:085749c8446f	1921	}
emh203	0:085749c8446f	1922	#else
emh203	0:085749c8446f	1923	if (fp->dsect - sect < cc) { /* Refill sector cache if it gets dirty by the direct write */
emh203	0:085749c8446f	1924	mem_cpy(fp->buf, wbuff + ((fp->dsect - sect) * SS(fp->fs)), SS(fp->fs));
emh203	0:085749c8446f	1925	fp->flag &= ~FA__DIRTY;
emh203	0:085749c8446f	1926	}
emh203	0:085749c8446f	1927	#endif
emh203	0:085749c8446f	1928	fp->csect += (BYTE)cc; /* Next sector address in the cluster */
emh203	0:085749c8446f	1929	wcnt = SS(fp->fs) * cc; /* Number of bytes transferred */
emh203	0:085749c8446f	1930	continue;
emh203	0:085749c8446f	1931	}
emh203	0:085749c8446f	1932	#if _FS_TINY
emh203	0:085749c8446f	1933	if (fp->fptr >= fp->fsize) { /* Avoid silly buffer filling at growing edge */
emh203	0:085749c8446f	1934	if (move_window(fp->fs, 0)) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1935	fp->fs->winsect = sect;
emh203	0:085749c8446f	1936	}
emh203	0:085749c8446f	1937	#else
emh203	0:085749c8446f	1938	if (fp->dsect != sect) { /* Fill sector buffer with file data */
emh203	0:085749c8446f	1939	if (fp->fptr < fp->fsize &&
emh203	0:085749c8446f	1940	disk_read(fp->fs->drive, fp->buf, sect, 1) != RES_OK)
emh203	0:085749c8446f	1941	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1942	}
emh203	0:085749c8446f	1943	#endif
emh203	0:085749c8446f	1944	fp->dsect = sect;
emh203	0:085749c8446f	1945	fp->csect++; /* Next sector address in the cluster */
emh203	0:085749c8446f	1946	}
emh203	0:085749c8446f	1947	wcnt = SS(fp->fs) - (fp->fptr % SS(fp->fs)); /* Put partial sector into file I/O buffer */
emh203	0:085749c8446f	1948	if (wcnt > btw) wcnt = btw;
emh203	0:085749c8446f	1949	#if _FS_TINY
emh203	0:085749c8446f	1950	if (move_window(fp->fs, fp->dsect)) /* Move sector window */
emh203	0:085749c8446f	1951	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1952	mem_cpy(&fp->fs->win[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
emh203	0:085749c8446f	1953	fp->fs->wflag = 1;
emh203	0:085749c8446f	1954	#else
emh203	0:085749c8446f	1955	mem_cpy(&fp->buf[fp->fptr % SS(fp->fs)], wbuff, wcnt); /* Fit partial sector */
emh203	0:085749c8446f	1956	fp->flag \|= FA__DIRTY;
emh203	0:085749c8446f	1957	#endif
emh203	0:085749c8446f	1958	}
emh203	0:085749c8446f	1959
emh203	0:085749c8446f	1960	if (fp->fptr > fp->fsize) fp->fsize = fp->fptr; /* Update file size if needed */
emh203	0:085749c8446f	1961	fp->flag \|= FA__WRITTEN; /* Set file changed flag */
emh203	0:085749c8446f	1962
emh203	0:085749c8446f	1963	LEAVE_FF(fp->fs, FR_OK);
emh203	0:085749c8446f	1964	}
emh203	0:085749c8446f	1965
emh203	0:085749c8446f	1966
emh203	0:085749c8446f	1967
emh203	0:085749c8446f	1968
emh203	0:085749c8446f	1969	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1970	/* Synchronize the File Object */
emh203	0:085749c8446f	1971	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	1972
emh203	0:085749c8446f	1973	FRESULT f_sync (
emh203	0:085749c8446f	1974	FIL fp / Pointer to the file object */
emh203	0:085749c8446f	1975	)
emh203	0:085749c8446f	1976	{
emh203	0:085749c8446f	1977	FRESULT res;
emh203	0:085749c8446f	1978	DWORD tim;
emh203	0:085749c8446f	1979	BYTE *dir;
emh203	0:085749c8446f	1980
emh203	0:085749c8446f	1981
emh203	0:085749c8446f	1982	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	1983	if (res == FR_OK) {
emh203	0:085749c8446f	1984	if (fp->flag & FA__WRITTEN) { /* Has the file been written? */
emh203	0:085749c8446f	1985	#if !_FS_TINY /* Write-back dirty buffer */
emh203	0:085749c8446f	1986	if (fp->flag & FA__DIRTY) {
emh203	0:085749c8446f	1987	if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
emh203	0:085749c8446f	1988	LEAVE_FF(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	1989	fp->flag &= ~FA__DIRTY;
emh203	0:085749c8446f	1990	}
emh203	0:085749c8446f	1991	#endif
emh203	0:085749c8446f	1992	/* Update the directory entry */
emh203	0:085749c8446f	1993	res = move_window(fp->fs, fp->dir_sect);
emh203	0:085749c8446f	1994	if (res == FR_OK) {
emh203	0:085749c8446f	1995	dir = fp->dir_ptr;
emh203	0:085749c8446f	1996	dir[DIR_Attr] \|= AM_ARC; /* Set archive bit */
emh203	0:085749c8446f	1997	ST_DWORD(dir+DIR_FileSize, fp->fsize); /* Update file size */
emh203	0:085749c8446f	1998	ST_WORD(dir+DIR_FstClusLO, fp->org_clust); /* Update start cluster */
emh203	0:085749c8446f	1999	ST_WORD(dir+DIR_FstClusHI, fp->org_clust >> 16);
emh203	0:085749c8446f	2000	tim = get_fattime(); /* Updated time */
emh203	0:085749c8446f	2001	ST_DWORD(dir+DIR_WrtTime, tim);
emh203	0:085749c8446f	2002	fp->flag &= ~FA__WRITTEN;
emh203	0:085749c8446f	2003	fp->fs->wflag = 1;
emh203	0:085749c8446f	2004	res = sync(fp->fs);
emh203	0:085749c8446f	2005	}
emh203	0:085749c8446f	2006	}
emh203	0:085749c8446f	2007	}
emh203	0:085749c8446f	2008
emh203	0:085749c8446f	2009	LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2010	}
emh203	0:085749c8446f	2011
emh203	0:085749c8446f	2012	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	2013
emh203	0:085749c8446f	2014
emh203	0:085749c8446f	2015
emh203	0:085749c8446f	2016
emh203	0:085749c8446f	2017	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2018	/* Close File */
emh203	0:085749c8446f	2019	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2020
emh203	0:085749c8446f	2021	FRESULT f_close (
emh203	0:085749c8446f	2022	FIL fp / Pointer to the file object to be closed */
emh203	0:085749c8446f	2023	)
emh203	0:085749c8446f	2024	{
emh203	0:085749c8446f	2025	FRESULT res;
emh203	0:085749c8446f	2026
emh203	0:085749c8446f	2027
emh203	0:085749c8446f	2028	#if _FS_READONLY
emh203	0:085749c8446f	2029	res = validate(fp->fs, fp->id);
emh203	0:085749c8446f	2030	if (res == FR_OK) fp->fs = NULL;
emh203	0:085749c8446f	2031	LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2032	#else
emh203	0:085749c8446f	2033	res = f_sync(fp);
emh203	0:085749c8446f	2034	if (res == FR_OK) fp->fs = NULL;
emh203	0:085749c8446f	2035	return res;
emh203	0:085749c8446f	2036	#endif
emh203	0:085749c8446f	2037	}
emh203	0:085749c8446f	2038
emh203	0:085749c8446f	2039
emh203	0:085749c8446f	2040
emh203	0:085749c8446f	2041
emh203	0:085749c8446f	2042	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2043	/* Change Current Drive/Directory */
emh203	0:085749c8446f	2044	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2045
emh203	0:085749c8446f	2046	#if _FS_RPATH
emh203	0:085749c8446f	2047
emh203	0:085749c8446f	2048	FRESULT f_chdrive (
emh203	0:085749c8446f	2049	BYTE drv /* Drive number */
emh203	0:085749c8446f	2050	)
emh203	0:085749c8446f	2051	{
emh203	0:085749c8446f	2052	if (drv >= _DRIVES) return FR_INVALID_DRIVE;
emh203	0:085749c8446f	2053
emh203	0:085749c8446f	2054	Drive = drv;
emh203	0:085749c8446f	2055
emh203	0:085749c8446f	2056	return FR_OK;
emh203	0:085749c8446f	2057	}
emh203	0:085749c8446f	2058
emh203	0:085749c8446f	2059
emh203	0:085749c8446f	2060
emh203	0:085749c8446f	2061
emh203	0:085749c8446f	2062	FRESULT f_chdir (
emh203	0:085749c8446f	2063	const XCHAR path / Pointer to the directory path */
emh203	0:085749c8446f	2064	)
emh203	0:085749c8446f	2065	{
emh203	0:085749c8446f	2066	FRESULT res;
emh203	0:085749c8446f	2067	DIR dj;
emh203	0:085749c8446f	2068	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2069	BYTE *dir;
emh203	0:085749c8446f	2070
emh203	0:085749c8446f	2071
emh203	0:085749c8446f	2072	res = chk_mounted(&path, &dj.fs, 0);
emh203	0:085749c8446f	2073	if (res == FR_OK) {
emh203	0:085749c8446f	2074	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2075	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2076	if (res == FR_OK) { /* Follow completed */
emh203	0:085749c8446f	2077	dir = dj.dir; /* Pointer to the entry */
emh203	0:085749c8446f	2078	if (!dir) {
emh203	0:085749c8446f	2079	dj.fs->cdir = 0; /* No entry (root dir) */
emh203	0:085749c8446f	2080	} else {
emh203	0:085749c8446f	2081	if (dir[DIR_Attr] & AM_DIR) /* Reached to the dir */
emh203	0:085749c8446f	2082	dj.fs->cdir = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
emh203	0:085749c8446f	2083	else
emh203	0:085749c8446f	2084	res = FR_NO_PATH; /* Could not reach the dir (it is a file) */
emh203	0:085749c8446f	2085	}
emh203	0:085749c8446f	2086	}
emh203	0:085749c8446f	2087	if (res == FR_NO_FILE) res = FR_NO_PATH;
emh203	0:085749c8446f	2088	}
emh203	0:085749c8446f	2089
emh203	0:085749c8446f	2090	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2091	}
emh203	0:085749c8446f	2092
emh203	0:085749c8446f	2093	#endif
emh203	0:085749c8446f	2094
emh203	0:085749c8446f	2095
emh203	0:085749c8446f	2096
emh203	0:085749c8446f	2097	#if _FS_MINIMIZE <= 2
emh203	0:085749c8446f	2098	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2099	/* Seek File R/W Pointer */
emh203	0:085749c8446f	2100	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2101
emh203	0:085749c8446f	2102	FRESULT f_lseek (
emh203	0:085749c8446f	2103	FIL fp, / Pointer to the file object */
emh203	0:085749c8446f	2104	DWORD ofs /* File pointer from top of file */
emh203	0:085749c8446f	2105	)
emh203	0:085749c8446f	2106	{
emh203	0:085749c8446f	2107	FRESULT res;
emh203	0:085749c8446f	2108	DWORD clst, bcs, nsect, ifptr;
emh203	0:085749c8446f	2109
emh203	0:085749c8446f	2110
emh203	0:085749c8446f	2111	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	2112	if (res != FR_OK) LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2113	if (fp->flag & FA__ERROR) /* Check abort flag */
emh203	0:085749c8446f	2114	LEAVE_FF(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2115	if (ofs > fp->fsize /* In read-only mode, clip offset with the file size */
emh203	0:085749c8446f	2116	#if !_FS_READONLY
emh203	0:085749c8446f	2117	&& !(fp->flag & FA_WRITE)
emh203	0:085749c8446f	2118	#endif
emh203	0:085749c8446f	2119	) ofs = fp->fsize;
emh203	0:085749c8446f	2120
emh203	0:085749c8446f	2121	ifptr = fp->fptr;
emh203	0:085749c8446f	2122	fp->fptr = nsect = 0; fp->csect = 255;
emh203	0:085749c8446f	2123	if (ofs > 0) {
emh203	0:085749c8446f	2124	bcs = (DWORD)fp->fs->csize * SS(fp->fs); /* Cluster size (byte) */
emh203	0:085749c8446f	2125	if (ifptr > 0 &&
emh203	0:085749c8446f	2126	(ofs - 1) / bcs >= (ifptr - 1) / bcs) { /* When seek to same or following cluster, */
emh203	0:085749c8446f	2127	fp->fptr = (ifptr - 1) & ~(bcs - 1); /* start from the current cluster */
emh203	0:085749c8446f	2128	ofs -= fp->fptr;
emh203	0:085749c8446f	2129	clst = fp->curr_clust;
emh203	0:085749c8446f	2130	} else { /* When seek to back cluster, */
emh203	0:085749c8446f	2131	clst = fp->org_clust; /* start from the first cluster */
emh203	0:085749c8446f	2132	#if !_FS_READONLY
emh203	0:085749c8446f	2133	if (clst == 0) { /* If no cluster chain, create a new chain */
emh203	0:085749c8446f	2134	clst = create_chain(fp->fs, 0);
emh203	0:085749c8446f	2135	if (clst == 1) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2136	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2137	fp->org_clust = clst;
emh203	0:085749c8446f	2138	}
emh203	0:085749c8446f	2139	#endif
emh203	0:085749c8446f	2140	fp->curr_clust = clst;
emh203	0:085749c8446f	2141	}
emh203	0:085749c8446f	2142	if (clst != 0) {
emh203	0:085749c8446f	2143	while (ofs > bcs) { /* Cluster following loop */
emh203	0:085749c8446f	2144	#if !_FS_READONLY
emh203	0:085749c8446f	2145	if (fp->flag & FA_WRITE) { /* Check if in write mode or not */
emh203	0:085749c8446f	2146	clst = create_chain(fp->fs, clst); /* Force streached if in write mode */
emh203	0:085749c8446f	2147	if (clst == 0) { /* When disk gets full, clip file size */
emh203	0:085749c8446f	2148	ofs = bcs; break;
emh203	0:085749c8446f	2149	}
emh203	0:085749c8446f	2150	} else
emh203	0:085749c8446f	2151	#endif
emh203	0:085749c8446f	2152	clst = get_fat(fp->fs, clst); /* Follow cluster chain if not in write mode */
emh203	0:085749c8446f	2153	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2154	if (clst <= 1 \|\| clst >= fp->fs->max_clust) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2155	fp->curr_clust = clst;
emh203	0:085749c8446f	2156	fp->fptr += bcs;
emh203	0:085749c8446f	2157	ofs -= bcs;
emh203	0:085749c8446f	2158	}
emh203	0:085749c8446f	2159	fp->fptr += ofs;
emh203	0:085749c8446f	2160	fp->csect = (BYTE)(ofs / SS(fp->fs)); /* Sector offset in the cluster */
emh203	0:085749c8446f	2161	if (ofs % SS(fp->fs)) {
emh203	0:085749c8446f	2162	nsect = clust2sect(fp->fs, clst); /* Current sector */
emh203	0:085749c8446f	2163	if (!nsect) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2164	nsect += fp->csect;
emh203	0:085749c8446f	2165	fp->csect++;
emh203	0:085749c8446f	2166	}
emh203	0:085749c8446f	2167	}
emh203	0:085749c8446f	2168	}
emh203	0:085749c8446f	2169	if (fp->fptr % SS(fp->fs) && nsect != fp->dsect) {
emh203	0:085749c8446f	2170	#if !_FS_TINY
emh203	0:085749c8446f	2171	#if !_FS_READONLY
emh203	0:085749c8446f	2172	if (fp->flag & FA__DIRTY) { /* Write-back dirty buffer if needed */
emh203	0:085749c8446f	2173	if (disk_write(fp->fs->drive, fp->buf, fp->dsect, 1) != RES_OK)
emh203	0:085749c8446f	2174	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2175	fp->flag &= ~FA__DIRTY;
emh203	0:085749c8446f	2176	}
emh203	0:085749c8446f	2177	#endif
emh203	0:085749c8446f	2178	if (disk_read(fp->fs->drive, fp->buf, nsect, 1) != RES_OK)
emh203	0:085749c8446f	2179	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2180	#endif
emh203	0:085749c8446f	2181	fp->dsect = nsect;
emh203	0:085749c8446f	2182	}
emh203	0:085749c8446f	2183	#if !_FS_READONLY
emh203	0:085749c8446f	2184	if (fp->fptr > fp->fsize) { /* Set changed flag if the file size is extended */
emh203	0:085749c8446f	2185	fp->fsize = fp->fptr;
emh203	0:085749c8446f	2186	fp->flag \|= FA__WRITTEN;
emh203	0:085749c8446f	2187	}
emh203	0:085749c8446f	2188	#endif
emh203	0:085749c8446f	2189
emh203	0:085749c8446f	2190	LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2191	}
emh203	0:085749c8446f	2192
emh203	0:085749c8446f	2193
emh203	0:085749c8446f	2194
emh203	0:085749c8446f	2195
emh203	0:085749c8446f	2196	#if _FS_MINIMIZE <= 1
emh203	0:085749c8446f	2197	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2198	/* Create a Directroy Object */
emh203	0:085749c8446f	2199	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2200
emh203	0:085749c8446f	2201	FRESULT f_opendir (
emh203	0:085749c8446f	2202	eDIR dj, / Pointer to directory object to create */
emh203	0:085749c8446f	2203	const XCHAR path / Pointer to the directory path */
emh203	0:085749c8446f	2204	)
emh203	0:085749c8446f	2205	{
emh203	0:085749c8446f	2206	FRESULT res;
emh203	0:085749c8446f	2207	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2208	BYTE *dir;
emh203	0:085749c8446f	2209
emh203	0:085749c8446f	2210
emh203	0:085749c8446f	2211	res = chk_mounted(&path, &dj->fs, 0);
emh203	0:085749c8446f	2212	if (res == FR_OK) {
emh203	0:085749c8446f	2213	INITBUF((*dj), sfn, lfn);
emh203	0:085749c8446f	2214	res = follow_path(dj, path); /* Follow the path to the directory */
emh203	0:085749c8446f	2215	if (res == FR_OK) { /* Follow completed */
emh203	0:085749c8446f	2216	dir = dj->dir;
emh203	0:085749c8446f	2217	if (dir) { /* It is not the root dir */
emh203	0:085749c8446f	2218	if (dir[DIR_Attr] & AM_DIR) { /* The object is a directory */
emh203	0:085749c8446f	2219	dj->sclust = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
emh203	0:085749c8446f	2220	} else { /* The object is not a directory */
emh203	0:085749c8446f	2221	res = FR_NO_PATH;
emh203	0:085749c8446f	2222	}
emh203	0:085749c8446f	2223	}
emh203	0:085749c8446f	2224	if (res == FR_OK) {
emh203	0:085749c8446f	2225	dj->id = dj->fs->id;
emh203	0:085749c8446f	2226	res = dir_seek(dj, 0); /* Rewind dir */
emh203	0:085749c8446f	2227	}
emh203	0:085749c8446f	2228	}
emh203	0:085749c8446f	2229	if (res == FR_NO_FILE) res = FR_NO_PATH;
emh203	0:085749c8446f	2230	}
emh203	0:085749c8446f	2231
emh203	0:085749c8446f	2232	LEAVE_FF(dj->fs, res);
emh203	0:085749c8446f	2233	}
emh203	0:085749c8446f	2234
emh203	0:085749c8446f	2235
emh203	0:085749c8446f	2236
emh203	0:085749c8446f	2237
emh203	0:085749c8446f	2238	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2239	/* Read Directory Entry in Sequense */
emh203	0:085749c8446f	2240	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2241
emh203	0:085749c8446f	2242	FRESULT f_readdir (
emh203	0:085749c8446f	2243	eDIR dj, / Pointer to the open directory object */
emh203	0:085749c8446f	2244	FILINFO fno / Pointer to file information to return */
emh203	0:085749c8446f	2245	)
emh203	0:085749c8446f	2246	{
emh203	0:085749c8446f	2247	FRESULT res;
emh203	0:085749c8446f	2248	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2249
emh203	0:085749c8446f	2250
emh203	0:085749c8446f	2251	res = validate(dj->fs, dj->id); /* Check validity of the object */
emh203	0:085749c8446f	2252	if (res == FR_OK) {
emh203	0:085749c8446f	2253	INITBUF((*dj), sfn, lfn);
emh203	0:085749c8446f	2254	if (!fno) {
emh203	0:085749c8446f	2255	res = dir_seek(dj, 0);
emh203	0:085749c8446f	2256	} else {
emh203	0:085749c8446f	2257	res = dir_read(dj);
emh203	0:085749c8446f	2258	if (res == FR_NO_FILE) {
emh203	0:085749c8446f	2259	dj->sect = 0;
emh203	0:085749c8446f	2260	res = FR_OK;
emh203	0:085749c8446f	2261	}
emh203	0:085749c8446f	2262	if (res == FR_OK) { /* A valid entry is found */
emh203	0:085749c8446f	2263	get_fileinfo(dj, fno); /* Get the object information */
emh203	0:085749c8446f	2264	res = dir_next(dj, FALSE); /* Increment index for next */
emh203	0:085749c8446f	2265	if (res == FR_NO_FILE) {
emh203	0:085749c8446f	2266	dj->sect = 0;
emh203	0:085749c8446f	2267	res = FR_OK;
emh203	0:085749c8446f	2268	}
emh203	0:085749c8446f	2269	}
emh203	0:085749c8446f	2270	}
emh203	0:085749c8446f	2271	}
emh203	0:085749c8446f	2272
emh203	0:085749c8446f	2273	LEAVE_FF(dj->fs, res);
emh203	0:085749c8446f	2274	}
emh203	0:085749c8446f	2275
emh203	0:085749c8446f	2276
emh203	0:085749c8446f	2277
emh203	0:085749c8446f	2278	#if _FS_MINIMIZE == 0
emh203	0:085749c8446f	2279	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2280	/* Get File Status */
emh203	0:085749c8446f	2281	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2282
emh203	0:085749c8446f	2283	FRESULT f_stat (
emh203	0:085749c8446f	2284	const XCHAR path, / Pointer to the file path */
emh203	0:085749c8446f	2285	FILINFO fno / Pointer to file information to return */
emh203	0:085749c8446f	2286	)
emh203	0:085749c8446f	2287	{
emh203	0:085749c8446f	2288	FRESULT res;
emh203	0:085749c8446f	2289	eDIR dj;
emh203	0:085749c8446f	2290	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2291
emh203	0:085749c8446f	2292
emh203	0:085749c8446f	2293	res = chk_mounted(&path, &dj.fs, 0);
emh203	0:085749c8446f	2294	if (res == FR_OK) {
emh203	0:085749c8446f	2295	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2296	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2297	if (res == FR_OK) { /* Follwo completed */
emh203	0:085749c8446f	2298	if (dj.dir) /* Found an object */
emh203	0:085749c8446f	2299	get_fileinfo(&dj, fno);
emh203	0:085749c8446f	2300	else /* It is root dir */
emh203	0:085749c8446f	2301	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2302	}
emh203	0:085749c8446f	2303	}
emh203	0:085749c8446f	2304
emh203	0:085749c8446f	2305	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2306	}
emh203	0:085749c8446f	2307
emh203	0:085749c8446f	2308
emh203	0:085749c8446f	2309
emh203	0:085749c8446f	2310	#if !_FS_READONLY
emh203	0:085749c8446f	2311	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2312	/* Get Number of Free Clusters */
emh203	0:085749c8446f	2313	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2314
emh203	0:085749c8446f	2315	FRESULT f_getfree (
emh203	0:085749c8446f	2316	const XCHAR path, / Pointer to the logical drive number (root dir) */
emh203	0:085749c8446f	2317	DWORD nclst, / Pointer to the variable to return number of free clusters */
emh203	0:085749c8446f	2318	FATFS *fatfs / Pointer to pointer to corresponding file system object to return */
emh203	0:085749c8446f	2319	)
emh203	0:085749c8446f	2320	{
emh203	0:085749c8446f	2321	FRESULT res;
emh203	0:085749c8446f	2322	DWORD n, clst, sect, stat;
emh203	0:085749c8446f	2323	UINT i;
emh203	0:085749c8446f	2324	BYTE fat, *p;
emh203	0:085749c8446f	2325
emh203	0:085749c8446f	2326
emh203	0:085749c8446f	2327	/* Get drive number */
emh203	0:085749c8446f	2328	res = chk_mounted(&path, fatfs, 0);
emh203	0:085749c8446f	2329	if (res != FR_OK) LEAVE_FF(*fatfs, res);
emh203	0:085749c8446f	2330
emh203	0:085749c8446f	2331	/* If number of free cluster is valid, return it without cluster scan. */
emh203	0:085749c8446f	2332	if ((fatfs)->free_clust <= (fatfs)->max_clust - 2) {
emh203	0:085749c8446f	2333	nclst = (fatfs)->free_clust;
emh203	0:085749c8446f	2334	LEAVE_FF(*fatfs, FR_OK);
emh203	0:085749c8446f	2335	}
emh203	0:085749c8446f	2336
emh203	0:085749c8446f	2337	/* Get number of free clusters */
emh203	0:085749c8446f	2338	fat = (*fatfs)->fs_type;
emh203	0:085749c8446f	2339	n = 0;
emh203	0:085749c8446f	2340	if (fat == FS_FAT12) {
emh203	0:085749c8446f	2341	clst = 2;
emh203	0:085749c8446f	2342	do {
emh203	0:085749c8446f	2343	stat = get_fat(*fatfs, clst);
emh203	0:085749c8446f	2344	if (stat == 0xFFFFFFFF) LEAVE_FF(*fatfs, FR_DISK_ERR);
emh203	0:085749c8446f	2345	if (stat == 1) LEAVE_FF(*fatfs, FR_INT_ERR);
emh203	0:085749c8446f	2346	if (stat == 0) n++;
emh203	0:085749c8446f	2347	} while (++clst < (*fatfs)->max_clust);
emh203	0:085749c8446f	2348	} else {
emh203	0:085749c8446f	2349	clst = (*fatfs)->max_clust;
emh203	0:085749c8446f	2350	sect = (*fatfs)->fatbase;
emh203	0:085749c8446f	2351	i = 0; p = 0;
emh203	0:085749c8446f	2352	do {
emh203	0:085749c8446f	2353	if (!i) {
emh203	0:085749c8446f	2354	res = move_window(*fatfs, sect++);
emh203	0:085749c8446f	2355	if (res != FR_OK)
emh203	0:085749c8446f	2356	LEAVE_FF(*fatfs, res);
emh203	0:085749c8446f	2357	p = (*fatfs)->win;
emh203	0:085749c8446f	2358	i = SS(*fatfs);
emh203	0:085749c8446f	2359	}
emh203	0:085749c8446f	2360	if (fat == FS_FAT16) {
emh203	0:085749c8446f	2361	if (LD_WORD(p) == 0) n++;
emh203	0:085749c8446f	2362	p += 2; i -= 2;
emh203	0:085749c8446f	2363	} else {
emh203	0:085749c8446f	2364	if ((LD_DWORD(p) & 0x0FFFFFFF) == 0) n++;
emh203	0:085749c8446f	2365	p += 4; i -= 4;
emh203	0:085749c8446f	2366	}
emh203	0:085749c8446f	2367	} while (--clst);
emh203	0:085749c8446f	2368	}
emh203	0:085749c8446f	2369	(*fatfs)->free_clust = n;
emh203	0:085749c8446f	2370	if (fat == FS_FAT32) (*fatfs)->fsi_flag = 1;
emh203	0:085749c8446f	2371	*nclst = n;
emh203	0:085749c8446f	2372
emh203	0:085749c8446f	2373	LEAVE_FF(*fatfs, FR_OK);
emh203	0:085749c8446f	2374	}
emh203	0:085749c8446f	2375
emh203	0:085749c8446f	2376
emh203	0:085749c8446f	2377
emh203	0:085749c8446f	2378
emh203	0:085749c8446f	2379	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2380	/* Truncate File */
emh203	0:085749c8446f	2381	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2382
emh203	0:085749c8446f	2383	FRESULT f_truncate (
emh203	0:085749c8446f	2384	FIL fp / Pointer to the file object */
emh203	0:085749c8446f	2385	)
emh203	0:085749c8446f	2386	{
emh203	0:085749c8446f	2387	FRESULT res;
emh203	0:085749c8446f	2388	DWORD ncl;
emh203	0:085749c8446f	2389
emh203	0:085749c8446f	2390
emh203	0:085749c8446f	2391	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	2392	if (res != FR_OK) LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2393	if (fp->flag & FA__ERROR) /* Check abort flag */
emh203	0:085749c8446f	2394	LEAVE_FF(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2395	if (!(fp->flag & FA_WRITE)) /* Check access mode */
emh203	0:085749c8446f	2396	LEAVE_FF(fp->fs, FR_DENIED);
emh203	0:085749c8446f	2397
emh203	0:085749c8446f	2398	if (fp->fsize > fp->fptr) {
emh203	0:085749c8446f	2399	fp->fsize = fp->fptr; /* Set file size to current R/W point */
emh203	0:085749c8446f	2400	fp->flag \|= FA__WRITTEN;
emh203	0:085749c8446f	2401	if (fp->fptr == 0) { /* When set file size to zero, remove entire cluster chain */
emh203	0:085749c8446f	2402	res = remove_chain(fp->fs, fp->org_clust);
emh203	0:085749c8446f	2403	fp->org_clust = 0;
emh203	0:085749c8446f	2404	} else { /* When truncate a part of the file, remove remaining clusters */
emh203	0:085749c8446f	2405	ncl = get_fat(fp->fs, fp->curr_clust);
emh203	0:085749c8446f	2406	res = FR_OK;
emh203	0:085749c8446f	2407	if (ncl == 0xFFFFFFFF) res = FR_DISK_ERR;
emh203	0:085749c8446f	2408	if (ncl == 1) res = FR_INT_ERR;
emh203	0:085749c8446f	2409	if (res == FR_OK && ncl < fp->fs->max_clust) {
emh203	0:085749c8446f	2410	res = put_fat(fp->fs, fp->curr_clust, 0x0FFFFFFF);
emh203	0:085749c8446f	2411	if (res == FR_OK) res = remove_chain(fp->fs, ncl);
emh203	0:085749c8446f	2412	}
emh203	0:085749c8446f	2413	}
emh203	0:085749c8446f	2414	}
emh203	0:085749c8446f	2415	if (res != FR_OK) fp->flag \|= FA__ERROR;
emh203	0:085749c8446f	2416
emh203	0:085749c8446f	2417	LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2418	}
emh203	0:085749c8446f	2419
emh203	0:085749c8446f	2420
emh203	0:085749c8446f	2421
emh203	0:085749c8446f	2422
emh203	0:085749c8446f	2423	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2424	/* Delete a File or Directory */
emh203	0:085749c8446f	2425	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2426
emh203	0:085749c8446f	2427	FRESULT f_unlink (
emh203	0:085749c8446f	2428	const XCHAR path / Pointer to the file or directory path */
emh203	0:085749c8446f	2429	)
emh203	0:085749c8446f	2430	{
emh203	0:085749c8446f	2431	FRESULT res;
emh203	0:085749c8446f	2432	eDIR dj, sdj;
emh203	0:085749c8446f	2433	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2434	BYTE *dir;
emh203	0:085749c8446f	2435	DWORD dclst;
emh203	0:085749c8446f	2436
emh203	0:085749c8446f	2437
emh203	0:085749c8446f	2438	res = chk_mounted(&path, &dj.fs, 1);
emh203	0:085749c8446f	2439	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2440
emh203	0:085749c8446f	2441	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2442	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2443	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
emh203	0:085749c8446f	2444	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2445	if (res != FR_OK) LEAVE_FF(dj.fs, res); /* Follow failed */
emh203	0:085749c8446f	2446
emh203	0:085749c8446f	2447	dir = dj.dir;
emh203	0:085749c8446f	2448	if (!dir) /* Is it the root directory? */
emh203	0:085749c8446f	2449	LEAVE_FF(dj.fs, FR_INVALID_NAME);
emh203	0:085749c8446f	2450	if (dir[DIR_Attr] & AM_RDO) /* Is it a R/O object? */
emh203	0:085749c8446f	2451	LEAVE_FF(dj.fs, FR_DENIED);
emh203	0:085749c8446f	2452	dclst = ((DWORD)LD_WORD(dir+DIR_FstClusHI) << 16) \| LD_WORD(dir+DIR_FstClusLO);
emh203	0:085749c8446f	2453
emh203	0:085749c8446f	2454	if (dir[DIR_Attr] & AM_DIR) { /* It is a sub-directory */
emh203	0:085749c8446f	2455	if (dclst < 2) LEAVE_FF(dj.fs, FR_INT_ERR);
emh203	0:085749c8446f	2456	mem_cpy(&sdj, &dj, sizeof(eDIR)); /* Check if the sub-dir is empty or not */
emh203	0:085749c8446f	2457	sdj.sclust = dclst;
emh203	0:085749c8446f	2458	res = dir_seek(&sdj, 2);
emh203	0:085749c8446f	2459	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2460	res = dir_read(&sdj);
emh203	0:085749c8446f	2461	if (res == FR_OK) res = FR_DENIED; /* Not empty sub-dir */
emh203	0:085749c8446f	2462	if (res != FR_NO_FILE) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2463	}
emh203	0:085749c8446f	2464
emh203	0:085749c8446f	2465	res = dir_remove(&dj); /* Remove directory entry */
emh203	0:085749c8446f	2466	if (res == FR_OK) {
emh203	0:085749c8446f	2467	if (dclst)
emh203	0:085749c8446f	2468	res = remove_chain(dj.fs, dclst); /* Remove the cluster chain */
emh203	0:085749c8446f	2469	if (res == FR_OK) res = sync(dj.fs);
emh203	0:085749c8446f	2470	}
emh203	0:085749c8446f	2471
emh203	0:085749c8446f	2472	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2473	}
emh203	0:085749c8446f	2474
emh203	0:085749c8446f	2475
emh203	0:085749c8446f	2476
emh203	0:085749c8446f	2477
emh203	0:085749c8446f	2478	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2479	/* Create a Directory */
emh203	0:085749c8446f	2480	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2481
emh203	0:085749c8446f	2482	FRESULT f_mkdir (
emh203	0:085749c8446f	2483	const XCHAR path / Pointer to the directory path */
emh203	0:085749c8446f	2484	)
emh203	0:085749c8446f	2485	{
emh203	0:085749c8446f	2486	FRESULT res;
emh203	0:085749c8446f	2487	eDIR dj;
emh203	0:085749c8446f	2488	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2489	BYTE *dir, n;
emh203	0:085749c8446f	2490	DWORD dsect, dclst, pclst, tim;
emh203	0:085749c8446f	2491
emh203	0:085749c8446f	2492
emh203	0:085749c8446f	2493	res = chk_mounted(&path, &dj.fs, 1);
emh203	0:085749c8446f	2494	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2495
emh203	0:085749c8446f	2496	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2497	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2498	if (res == FR_OK) res = FR_EXIST; /* Any file or directory is already existing */
emh203	0:085749c8446f	2499	if (_FS_RPATH && res == FR_NO_FILE && (dj.fn[NS] & NS_DOT))
emh203	0:085749c8446f	2500	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2501	if (res != FR_NO_FILE) /* Any error occured */
emh203	0:085749c8446f	2502	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2503
emh203	0:085749c8446f	2504	dclst = create_chain(dj.fs, 0); /* Allocate a new cluster for new directory table */
emh203	0:085749c8446f	2505	res = FR_OK;
emh203	0:085749c8446f	2506	if (dclst == 0) res = FR_DENIED;
emh203	0:085749c8446f	2507	if (dclst == 1) res = FR_INT_ERR;
emh203	0:085749c8446f	2508	if (dclst == 0xFFFFFFFF) res = FR_DISK_ERR;
emh203	0:085749c8446f	2509	if (res == FR_OK)
emh203	0:085749c8446f	2510	res = move_window(dj.fs, 0);
emh203	0:085749c8446f	2511	if (res != FR_OK) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2512	dsect = clust2sect(dj.fs, dclst);
emh203	0:085749c8446f	2513
emh203	0:085749c8446f	2514	dir = dj.fs->win; /* Initialize the new directory table */
emh203	0:085749c8446f	2515	mem_set(dir, 0, SS(dj.fs));
emh203	0:085749c8446f	2516	mem_set(dir+DIR_Name, ' ', 8+3); /* Create "." entry */
emh203	0:085749c8446f	2517	dir[DIR_Name] = '.';
emh203	0:085749c8446f	2518	dir[DIR_Attr] = AM_DIR;
emh203	0:085749c8446f	2519	tim = get_fattime();
emh203	0:085749c8446f	2520	ST_DWORD(dir+DIR_WrtTime, tim);
emh203	0:085749c8446f	2521	ST_WORD(dir+DIR_FstClusLO, dclst);
emh203	0:085749c8446f	2522	ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
emh203	0:085749c8446f	2523	mem_cpy(dir+32, dir, 32); /* Create ".." entry */
emh203	0:085749c8446f	2524	dir[33] = '.';
emh203	0:085749c8446f	2525	pclst = dj.sclust;
emh203	0:085749c8446f	2526	if (dj.fs->fs_type == FS_FAT32 && pclst == dj.fs->dirbase)
emh203	0:085749c8446f	2527	pclst = 0;
emh203	0:085749c8446f	2528	ST_WORD(dir+32+DIR_FstClusLO, pclst);
emh203	0:085749c8446f	2529	ST_WORD(dir+32+DIR_FstClusHI, pclst >> 16);
emh203	0:085749c8446f	2530	for (n = 0; n < dj.fs->csize; n++) { /* Write dot entries and clear left sectors */
emh203	0:085749c8446f	2531	dj.fs->winsect = dsect++;
emh203	0:085749c8446f	2532	dj.fs->wflag = 1;
emh203	0:085749c8446f	2533	res = move_window(dj.fs, 0);
emh203	0:085749c8446f	2534	if (res) LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2535	mem_set(dir, 0, SS(dj.fs));
emh203	0:085749c8446f	2536	}
emh203	0:085749c8446f	2537
emh203	0:085749c8446f	2538	res = dir_register(&dj);
emh203	0:085749c8446f	2539	if (res != FR_OK) {
emh203	0:085749c8446f	2540	remove_chain(dj.fs, dclst);
emh203	0:085749c8446f	2541	} else {
emh203	0:085749c8446f	2542	dir = dj.dir;
emh203	0:085749c8446f	2543	dir[DIR_Attr] = AM_DIR; /* Attribute */
emh203	0:085749c8446f	2544	ST_DWORD(dir+DIR_WrtTime, tim); /* Crated time */
emh203	0:085749c8446f	2545	ST_WORD(dir+DIR_FstClusLO, dclst); /* Table start cluster */
emh203	0:085749c8446f	2546	ST_WORD(dir+DIR_FstClusHI, dclst >> 16);
emh203	0:085749c8446f	2547	dj.fs->wflag = 1;
emh203	0:085749c8446f	2548	res = sync(dj.fs);
emh203	0:085749c8446f	2549	}
emh203	0:085749c8446f	2550
emh203	0:085749c8446f	2551	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2552	}
emh203	0:085749c8446f	2553
emh203	0:085749c8446f	2554
emh203	0:085749c8446f	2555
emh203	0:085749c8446f	2556
emh203	0:085749c8446f	2557	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2558	/* Change File Attribute */
emh203	0:085749c8446f	2559	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2560
emh203	0:085749c8446f	2561	FRESULT f_chmod (
emh203	0:085749c8446f	2562	const XCHAR path, / Pointer to the file path */
emh203	0:085749c8446f	2563	BYTE value, /* Attribute bits */
emh203	0:085749c8446f	2564	BYTE mask /* Attribute mask to change */
emh203	0:085749c8446f	2565	)
emh203	0:085749c8446f	2566	{
emh203	0:085749c8446f	2567	FRESULT res;
emh203	0:085749c8446f	2568	eDIR dj;
emh203	0:085749c8446f	2569	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2570	BYTE *dir;
emh203	0:085749c8446f	2571
emh203	0:085749c8446f	2572
emh203	0:085749c8446f	2573	res = chk_mounted(&path, &dj.fs, 1);
emh203	0:085749c8446f	2574	if (res == FR_OK) {
emh203	0:085749c8446f	2575	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2576	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2577	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
emh203	0:085749c8446f	2578	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2579	if (res == FR_OK) {
emh203	0:085749c8446f	2580	dir = dj.dir;
emh203	0:085749c8446f	2581	if (!dir) { /* Is it a root directory? */
emh203	0:085749c8446f	2582	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2583	} else { /* File or sub directory */
emh203	0:085749c8446f	2584	mask &= AM_RDO\|AM_HID\|AM_SYS\|AM_ARC; /* Valid attribute mask */
emh203	0:085749c8446f	2585	dir[DIR_Attr] = (value & mask) \| (dir[DIR_Attr] & (BYTE)~mask); /* Apply attribute change */
emh203	0:085749c8446f	2586	dj.fs->wflag = 1;
emh203	0:085749c8446f	2587	res = sync(dj.fs);
emh203	0:085749c8446f	2588	}
emh203	0:085749c8446f	2589	}
emh203	0:085749c8446f	2590	}
emh203	0:085749c8446f	2591
emh203	0:085749c8446f	2592	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2593	}
emh203	0:085749c8446f	2594
emh203	0:085749c8446f	2595
emh203	0:085749c8446f	2596
emh203	0:085749c8446f	2597
emh203	0:085749c8446f	2598	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2599	/* Change Timestamp */
emh203	0:085749c8446f	2600	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2601
emh203	0:085749c8446f	2602	FRESULT f_utime (
emh203	0:085749c8446f	2603	const XCHAR path, / Pointer to the file/directory name */
emh203	0:085749c8446f	2604	const FILINFO fno / Pointer to the timestamp to be set */
emh203	0:085749c8446f	2605	)
emh203	0:085749c8446f	2606	{
emh203	0:085749c8446f	2607	FRESULT res;
emh203	0:085749c8446f	2608	eDIR dj;
emh203	0:085749c8446f	2609	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2610	BYTE *dir;
emh203	0:085749c8446f	2611
emh203	0:085749c8446f	2612
emh203	0:085749c8446f	2613	res = chk_mounted(&path, &dj.fs, 1);
emh203	0:085749c8446f	2614	if (res == FR_OK) {
emh203	0:085749c8446f	2615	INITBUF(dj, sfn, lfn);
emh203	0:085749c8446f	2616	res = follow_path(&dj, path); /* Follow the file path */
emh203	0:085749c8446f	2617	if (_FS_RPATH && res == FR_OK && (dj.fn[NS] & NS_DOT))
emh203	0:085749c8446f	2618	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2619	if (res == FR_OK) {
emh203	0:085749c8446f	2620	dir = dj.dir;
emh203	0:085749c8446f	2621	if (!dir) { /* Root directory */
emh203	0:085749c8446f	2622	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2623	} else { /* File or sub-directory */
emh203	0:085749c8446f	2624	ST_WORD(dir+DIR_WrtTime, fno->ftime);
emh203	0:085749c8446f	2625	ST_WORD(dir+DIR_WrtDate, fno->fdate);
emh203	0:085749c8446f	2626	dj.fs->wflag = 1;
emh203	0:085749c8446f	2627	res = sync(dj.fs);
emh203	0:085749c8446f	2628	}
emh203	0:085749c8446f	2629	}
emh203	0:085749c8446f	2630	}
emh203	0:085749c8446f	2631
emh203	0:085749c8446f	2632	LEAVE_FF(dj.fs, res);
emh203	0:085749c8446f	2633	}
emh203	0:085749c8446f	2634
emh203	0:085749c8446f	2635
emh203	0:085749c8446f	2636
emh203	0:085749c8446f	2637
emh203	0:085749c8446f	2638	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2639	/* Rename File/Directory */
emh203	0:085749c8446f	2640	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2641
emh203	0:085749c8446f	2642	FRESULT f_rename (
emh203	0:085749c8446f	2643	const XCHAR path_old, / Pointer to the old name */
emh203	0:085749c8446f	2644	const XCHAR path_new / Pointer to the new name */
emh203	0:085749c8446f	2645	)
emh203	0:085749c8446f	2646	{
emh203	0:085749c8446f	2647	FRESULT res;
emh203	0:085749c8446f	2648	eDIR dj_old, dj_new;
emh203	0:085749c8446f	2649	NAMEBUF(sfn, lfn);
emh203	0:085749c8446f	2650	BYTE buf[21], *dir;
emh203	0:085749c8446f	2651	DWORD dw;
emh203	0:085749c8446f	2652
emh203	0:085749c8446f	2653
emh203	0:085749c8446f	2654	INITBUF(dj_old, sfn, lfn);
emh203	0:085749c8446f	2655	res = chk_mounted(&path_old, &dj_old.fs, 1);
emh203	0:085749c8446f	2656	if (res == FR_OK) {
emh203	0:085749c8446f	2657	dj_new.fs = dj_old.fs;
emh203	0:085749c8446f	2658	res = follow_path(&dj_old, path_old); /* Check old object */
emh203	0:085749c8446f	2659	if (_FS_RPATH && res == FR_OK && (dj_old.fn[NS] & NS_DOT))
emh203	0:085749c8446f	2660	res = FR_INVALID_NAME;
emh203	0:085749c8446f	2661	}
emh203	0:085749c8446f	2662	if (res != FR_OK) LEAVE_FF(dj_old.fs, res); /* The old object is not found */
emh203	0:085749c8446f	2663
emh203	0:085749c8446f	2664	if (!dj_old.dir) LEAVE_FF(dj_old.fs, FR_NO_FILE); /* Is root dir? */
emh203	0:085749c8446f	2665	mem_cpy(buf, dj_old.dir+DIR_Attr, 21); /* Save the object information */
emh203	0:085749c8446f	2666
emh203	0:085749c8446f	2667	mem_cpy(&dj_new, &dj_old, sizeof(eDIR));
emh203	0:085749c8446f	2668	res = follow_path(&dj_new, path_new); /* Check new object */
emh203	0:085749c8446f	2669	if (res == FR_OK) res = FR_EXIST; /* The new object name is already existing */
emh203	0:085749c8446f	2670	if (res == FR_NO_FILE) { /* Is it a valid path and no name collision? */
emh203	0:085749c8446f	2671	res = dir_register(&dj_new); /* Register the new object */
emh203	0:085749c8446f	2672	if (res == FR_OK) {
emh203	0:085749c8446f	2673	dir = dj_new.dir; /* Copy object information into new entry */
emh203	0:085749c8446f	2674	mem_cpy(dir+13, buf+2, 19);
emh203	0:085749c8446f	2675	dir[DIR_Attr] = buf[0] \| AM_ARC;
emh203	0:085749c8446f	2676	dj_old.fs->wflag = 1;
emh203	0:085749c8446f	2677	if (dir[DIR_Attr] & AM_DIR) { /* Update .. entry in the directory if needed */
emh203	0:085749c8446f	2678	dw = clust2sect(dj_new.fs, (DWORD)LD_WORD(dir+DIR_FstClusHI) \| LD_WORD(dir+DIR_FstClusLO));
emh203	0:085749c8446f	2679	if (!dw) {
emh203	0:085749c8446f	2680	res = FR_INT_ERR;
emh203	0:085749c8446f	2681	} else {
emh203	0:085749c8446f	2682	res = move_window(dj_new.fs, dw);
emh203	0:085749c8446f	2683	dir = dj_new.fs->win+32;
emh203	0:085749c8446f	2684	if (res == FR_OK && dir[1] == '.') {
emh203	0:085749c8446f	2685	dw = (dj_new.fs->fs_type == FS_FAT32 && dj_new.sclust == dj_new.fs->dirbase) ? 0 : dj_new.sclust;
emh203	0:085749c8446f	2686	ST_WORD(dir+DIR_FstClusLO, dw);
emh203	0:085749c8446f	2687	ST_WORD(dir+DIR_FstClusHI, dw >> 16);
emh203	0:085749c8446f	2688	dj_new.fs->wflag = 1;
emh203	0:085749c8446f	2689	}
emh203	0:085749c8446f	2690	}
emh203	0:085749c8446f	2691	}
emh203	0:085749c8446f	2692	if (res == FR_OK) {
emh203	0:085749c8446f	2693	res = dir_remove(&dj_old); /* Remove old entry */
emh203	0:085749c8446f	2694	if (res == FR_OK)
emh203	0:085749c8446f	2695	res = sync(dj_old.fs);
emh203	0:085749c8446f	2696	}
emh203	0:085749c8446f	2697	}
emh203	0:085749c8446f	2698	}
emh203	0:085749c8446f	2699
emh203	0:085749c8446f	2700	LEAVE_FF(dj_old.fs, res);
emh203	0:085749c8446f	2701	}
emh203	0:085749c8446f	2702
emh203	0:085749c8446f	2703	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	2704	#endif /* _FS_MINIMIZE == 0 */
emh203	0:085749c8446f	2705	#endif /* _FS_MINIMIZE <= 1 */
emh203	0:085749c8446f	2706	#endif /* _FS_MINIMIZE <= 2 */
emh203	0:085749c8446f	2707
emh203	0:085749c8446f	2708
emh203	0:085749c8446f	2709
emh203	0:085749c8446f	2710	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2711	/* Forward data to the stream directly (Available on only _FS_TINY cfg) */
emh203	0:085749c8446f	2712	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2713	#if _USE_FORWARD && _FS_TINY
emh203	0:085749c8446f	2714
emh203	0:085749c8446f	2715	FRESULT f_forward (
emh203	0:085749c8446f	2716	FIL fp, / Pointer to the file object */
emh203	0:085749c8446f	2717	UINT (func)(const BYTE,UINT), /* Pointer to the streaming function */
emh203	0:085749c8446f	2718	UINT btr, /* Number of bytes to forward */
emh203	0:085749c8446f	2719	UINT bf / Pointer to number of bytes forwarded */
emh203	0:085749c8446f	2720	)
emh203	0:085749c8446f	2721	{
emh203	0:085749c8446f	2722	FRESULT res;
emh203	0:085749c8446f	2723	DWORD remain, clst, sect;
emh203	0:085749c8446f	2724	UINT rcnt;
emh203	0:085749c8446f	2725
emh203	0:085749c8446f	2726
emh203	0:085749c8446f	2727	*bf = 0;
emh203	0:085749c8446f	2728
emh203	0:085749c8446f	2729	res = validate(fp->fs, fp->id); /* Check validity of the object */
emh203	0:085749c8446f	2730	if (res != FR_OK) LEAVE_FF(fp->fs, res);
emh203	0:085749c8446f	2731	if (fp->flag & FA__ERROR) /* Check error flag */
emh203	0:085749c8446f	2732	LEAVE_FF(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2733	if (!(fp->flag & FA_READ)) /* Check access mode */
emh203	0:085749c8446f	2734	LEAVE_FF(fp->fs, FR_DENIED);
emh203	0:085749c8446f	2735
emh203	0:085749c8446f	2736	remain = fp->fsize - fp->fptr;
emh203	0:085749c8446f	2737	if (btr > remain) btr = (UINT)remain; /* Truncate btr by remaining bytes */
emh203	0:085749c8446f	2738
emh203	0:085749c8446f	2739	for ( ; btr && (func)(NULL, 0); / Repeat until all data transferred or stream becomes busy */
emh203	0:085749c8446f	2740	fp->fptr += rcnt, *bf += rcnt, btr -= rcnt) {
emh203	0:085749c8446f	2741	if ((fp->fptr % SS(fp->fs)) == 0) { /* On the sector boundary? */
emh203	0:085749c8446f	2742	if (fp->csect >= fp->fs->csize) { /* On the cluster boundary? */
emh203	0:085749c8446f	2743	clst = (fp->fptr == 0) ? /* On the top of the file? */
emh203	0:085749c8446f	2744	fp->org_clust : get_fat(fp->fs, fp->curr_clust);
emh203	0:085749c8446f	2745	if (clst <= 1) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2746	if (clst == 0xFFFFFFFF) ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2747	fp->curr_clust = clst; /* Update current cluster */
emh203	0:085749c8446f	2748	fp->csect = 0; /* Reset sector address in the cluster */
emh203	0:085749c8446f	2749	}
emh203	0:085749c8446f	2750	fp->csect++; /* Next sector address in the cluster */
emh203	0:085749c8446f	2751	}
emh203	0:085749c8446f	2752	sect = clust2sect(fp->fs, fp->curr_clust); /* Get current data sector */
emh203	0:085749c8446f	2753	if (!sect) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2754	sect += fp->csect - 1;
emh203	0:085749c8446f	2755	if (move_window(fp->fs, sect)) /* Move sector window */
emh203	0:085749c8446f	2756	ABORT(fp->fs, FR_DISK_ERR);
emh203	0:085749c8446f	2757	fp->dsect = sect;
emh203	0:085749c8446f	2758	rcnt = SS(fp->fs) - (WORD)(fp->fptr % SS(fp->fs)); /* Forward data from sector window */
emh203	0:085749c8446f	2759	if (rcnt > btr) rcnt = btr;
emh203	0:085749c8446f	2760	rcnt = (*func)(&fp->fs->win[(WORD)fp->fptr % SS(fp->fs)], rcnt);
emh203	0:085749c8446f	2761	if (!rcnt) ABORT(fp->fs, FR_INT_ERR);
emh203	0:085749c8446f	2762	}
emh203	0:085749c8446f	2763
emh203	0:085749c8446f	2764	LEAVE_FF(fp->fs, FR_OK);
emh203	0:085749c8446f	2765	}
emh203	0:085749c8446f	2766	#endif /* _USE_FORWARD */
emh203	0:085749c8446f	2767
emh203	0:085749c8446f	2768
emh203	0:085749c8446f	2769
emh203	0:085749c8446f	2770	#if _USE_MKFS && !_FS_READONLY
emh203	0:085749c8446f	2771	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2772	/* Create File System on the Drive */
emh203	0:085749c8446f	2773	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2774	#define N_ROOTDIR 512 /* Multiple of 32 and <= 2048 */
emh203	0:085749c8446f	2775	#define N_FATS 1 /* 1 or 2 */
emh203	0:085749c8446f	2776	#define MAX_SECTOR 131072000UL /* Maximum partition size */
emh203	0:085749c8446f	2777	#define MIN_SECTOR 2000UL /* Minimum partition size */
emh203	0:085749c8446f	2778
emh203	0:085749c8446f	2779
emh203	0:085749c8446f	2780	FRESULT f_mkfs (
emh203	0:085749c8446f	2781	BYTE drv, /* Logical drive number */
emh203	0:085749c8446f	2782	BYTE partition, /* Partitioning rule 0:FDISK, 1:SFD */
emh203	0:085749c8446f	2783	WORD allocsize /* Allocation unit size [bytes] */
emh203	0:085749c8446f	2784	)
emh203	0:085749c8446f	2785	{
emh203	0:085749c8446f	2786	static const DWORD sstbl[] = { 2048000, 1024000, 512000, 256000, 128000, 64000, 32000, 16000, 8000, 4000, 0 };
emh203	0:085749c8446f	2787	static const WORD cstbl[] = { 32768, 16384, 8192, 4096, 2048, 16384, 8192, 4096, 2048, 1024, 512 };
emh203	0:085749c8446f	2788	BYTE fmt, m, *tbl;
emh203	0:085749c8446f	2789	DWORD b_part, b_fat, b_dir, b_data; /* Area offset (LBA) */
emh203	0:085749c8446f	2790	DWORD n_part, n_rsv, n_fat, n_dir; /* Area size */
emh203	0:085749c8446f	2791	DWORD n_clst, d, n;
emh203	0:085749c8446f	2792	WORD as;
emh203	0:085749c8446f	2793	FATFS *fs;
emh203	0:085749c8446f	2794	DSTATUS stat;
emh203	0:085749c8446f	2795
emh203	0:085749c8446f	2796
emh203	0:085749c8446f	2797	/* Check validity of the parameters */
emh203	0:085749c8446f	2798	if (drv >= _DRIVES) return FR_INVALID_DRIVE;
emh203	0:085749c8446f	2799	if (partition >= 2) return FR_MKFS_ABORTED;
emh203	0:085749c8446f	2800
emh203	0:085749c8446f	2801	/* Check mounted drive and clear work area */
emh203	0:085749c8446f	2802	fs = FatFs[drv];
emh203	0:085749c8446f	2803	if (!fs) return FR_NOT_ENABLED;
emh203	0:085749c8446f	2804	fs->fs_type = 0;
emh203	0:085749c8446f	2805	drv = LD2PD(drv);
emh203	0:085749c8446f	2806
emh203	0:085749c8446f	2807	/* Get disk statics */
emh203	0:085749c8446f	2808	stat = disk_initialize(drv);
emh203	0:085749c8446f	2809	if (stat & STA_NOINIT) return FR_NOT_READY;
emh203	0:085749c8446f	2810	if (stat & STA_PROTECT) return FR_WRITE_PROTECTED;
emh203	0:085749c8446f	2811	#if _MAX_SS != 512 /* Get disk sector size */
emh203	0:085749c8446f	2812	if (disk_ioctl(drv, GET_SECTOR_SIZE, &SS(fs)) != RES_OK
emh203	0:085749c8446f	2813	\|\| SS(fs) > _MAX_SS)
emh203	0:085749c8446f	2814	return FR_MKFS_ABORTED;
emh203	0:085749c8446f	2815	#endif
emh203	0:085749c8446f	2816	if (disk_ioctl(drv, GET_SECTOR_COUNT, &n_part) != RES_OK \|\| n_part < MIN_SECTOR)
emh203	0:085749c8446f	2817	return FR_MKFS_ABORTED;
emh203	0:085749c8446f	2818	if (n_part > MAX_SECTOR) n_part = MAX_SECTOR;
emh203	0:085749c8446f	2819	b_part = (!partition) ? 63 : 0; /* Boot sector */
emh203	0:085749c8446f	2820	n_part -= b_part;
emh203	0:085749c8446f	2821	for (d = 512; d <= 32768U && d != allocsize; d <<= 1) ; /* Check validity of the allocation unit size */
emh203	0:085749c8446f	2822	if (d != allocsize) allocsize = 0;
emh203	0:085749c8446f	2823	if (!allocsize) { /* Auto selection of cluster size */
emh203	0:085749c8446f	2824	d = n_part;
emh203	0:085749c8446f	2825	for (as = SS(fs); as > 512U; as >>= 1) d >>= 1;
emh203	0:085749c8446f	2826	for (n = 0; d < sstbl[n]; n++) ;
emh203	0:085749c8446f	2827	allocsize = cstbl[n];
emh203	0:085749c8446f	2828	}
emh203	0:085749c8446f	2829	if (allocsize < SS(fs)) allocsize = SS(fs);
emh203	0:085749c8446f	2830
emh203	0:085749c8446f	2831	allocsize /= SS(fs); /* Number of sectors per cluster */
emh203	0:085749c8446f	2832
emh203	0:085749c8446f	2833	/* Pre-compute number of clusters and FAT type */
emh203	0:085749c8446f	2834	n_clst = n_part / allocsize;
emh203	0:085749c8446f	2835	fmt = FS_FAT12;
emh203	0:085749c8446f	2836	if (n_clst >= 0xFF5) fmt = FS_FAT16;
emh203	0:085749c8446f	2837	if (n_clst >= 0xFFF5) fmt = FS_FAT32;
emh203	0:085749c8446f	2838
emh203	0:085749c8446f	2839	/* Determine offset and size of FAT structure */
emh203	0:085749c8446f	2840	switch (fmt) {
emh203	0:085749c8446f	2841	case FS_FAT12:
emh203	0:085749c8446f	2842	n_fat = ((n_clst * 3 + 1) / 2 + 3 + SS(fs) - 1) / SS(fs);
emh203	0:085749c8446f	2843	n_rsv = 1 + partition;
emh203	0:085749c8446f	2844	n_dir = N_ROOTDIR * 32 / SS(fs);
emh203	0:085749c8446f	2845	break;
emh203	0:085749c8446f	2846	case FS_FAT16:
emh203	0:085749c8446f	2847	n_fat = ((n_clst * 2) + 4 + SS(fs) - 1) / SS(fs);
emh203	0:085749c8446f	2848	n_rsv = 1 + partition;
emh203	0:085749c8446f	2849	n_dir = N_ROOTDIR * 32 / SS(fs);
emh203	0:085749c8446f	2850	break;
emh203	0:085749c8446f	2851	default:
emh203	0:085749c8446f	2852	n_fat = ((n_clst * 4) + 8 + SS(fs) - 1) / SS(fs);
emh203	0:085749c8446f	2853	n_rsv = 33 - partition;
emh203	0:085749c8446f	2854	n_dir = 0;
emh203	0:085749c8446f	2855	}
emh203	0:085749c8446f	2856	b_fat = b_part + n_rsv; /* FATs start sector */
emh203	0:085749c8446f	2857	b_dir = b_fat + n_fat * N_FATS; /* Directory start sector */
emh203	0:085749c8446f	2858	b_data = b_dir + n_dir; /* Data start sector */
emh203	0:085749c8446f	2859
emh203	0:085749c8446f	2860	/* Align data start sector to erase block boundary (for flash memory media) */
emh203	0:085749c8446f	2861	if (disk_ioctl(drv, GET_BLOCK_SIZE, &n) != RES_OK) return FR_MKFS_ABORTED;
emh203	0:085749c8446f	2862	n = (b_data + n - 1) & ~(n - 1);
emh203	0:085749c8446f	2863	n_fat += (n - b_data) / N_FATS;
emh203	0:085749c8446f	2864	/* b_dir and b_data are no longer used below */
emh203	0:085749c8446f	2865
emh203	0:085749c8446f	2866	/* Determine number of cluster and final check of validity of the FAT type */
emh203	0:085749c8446f	2867	n_clst = (n_part - n_rsv - n_fat * N_FATS - n_dir) / allocsize;
emh203	0:085749c8446f	2868	if ( (fmt == FS_FAT16 && n_clst < 0xFF5)
emh203	0:085749c8446f	2869	\|\| (fmt == FS_FAT32 && n_clst < 0xFFF5))
emh203	0:085749c8446f	2870	return FR_MKFS_ABORTED;
emh203	0:085749c8446f	2871
emh203	0:085749c8446f	2872	/* Create partition table if needed */
emh203	0:085749c8446f	2873	if (!partition) {
emh203	0:085749c8446f	2874	DWORD n_disk = b_part + n_part;
emh203	0:085749c8446f	2875
emh203	0:085749c8446f	2876	mem_set(fs->win, 0, SS(fs));
emh203	0:085749c8446f	2877	tbl = fs->win+MBR_Table;
emh203	0:085749c8446f	2878	ST_DWORD(tbl, 0x00010180); /* Partition start in CHS */
emh203	0:085749c8446f	2879	if (n_disk < 63UL * 255 * 1024) { /* Partition end in CHS */
emh203	0:085749c8446f	2880	n_disk = n_disk / 63 / 255;
emh203	0:085749c8446f	2881	tbl[7] = (BYTE)n_disk;
emh203	0:085749c8446f	2882	tbl[6] = (BYTE)((n_disk >> 2) \| 63);
emh203	0:085749c8446f	2883	} else {
emh203	0:085749c8446f	2884	ST_WORD(&tbl[6], 0xFFFF);
emh203	0:085749c8446f	2885	}
emh203	0:085749c8446f	2886	tbl[5] = 254;
emh203	0:085749c8446f	2887	if (fmt != FS_FAT32) /* System ID */
emh203	0:085749c8446f	2888	tbl[4] = (n_part < 0x10000) ? 0x04 : 0x06;
emh203	0:085749c8446f	2889	else
emh203	0:085749c8446f	2890	tbl[4] = 0x0c;
emh203	0:085749c8446f	2891	ST_DWORD(tbl+8, 63); /* Partition start in LBA */
emh203	0:085749c8446f	2892	ST_DWORD(tbl+12, n_part); /* Partition size in LBA */
emh203	0:085749c8446f	2893	ST_WORD(tbl+64, 0xAA55); /* Signature */
emh203	0:085749c8446f	2894	if (disk_write(drv, fs->win, 0, 1) != RES_OK)
emh203	0:085749c8446f	2895	return FR_DISK_ERR;
emh203	0:085749c8446f	2896	partition = 0xF8;
emh203	0:085749c8446f	2897	} else {
emh203	0:085749c8446f	2898	partition = 0xF0;
emh203	0:085749c8446f	2899	}
emh203	0:085749c8446f	2900
emh203	0:085749c8446f	2901	/* Create boot record */
emh203	0:085749c8446f	2902	tbl = fs->win; /* Clear buffer */
emh203	0:085749c8446f	2903	mem_set(tbl, 0, SS(fs));
emh203	0:085749c8446f	2904	ST_DWORD(tbl+BS_jmpBoot, 0x90FEEB); /* Boot code (jmp $, nop) */
emh203	0:085749c8446f	2905	ST_WORD(tbl+BPB_BytsPerSec, SS(fs)); /* Sector size */
emh203	0:085749c8446f	2906	tbl[BPB_SecPerClus] = (BYTE)allocsize; /* Sectors per cluster */
emh203	0:085749c8446f	2907	ST_WORD(tbl+BPB_RsvdSecCnt, n_rsv); /* Reserved sectors */
emh203	0:085749c8446f	2908	tbl[BPB_NumFATs] = N_FATS; /* Number of FATs */
emh203	0:085749c8446f	2909	ST_WORD(tbl+BPB_RootEntCnt, SS(fs) / 32 * n_dir); /* Number of rootdir entries */
emh203	0:085749c8446f	2910	if (n_part < 0x10000) { /* Number of total sectors */
emh203	0:085749c8446f	2911	ST_WORD(tbl+BPB_TotSec16, n_part);
emh203	0:085749c8446f	2912	} else {
emh203	0:085749c8446f	2913	ST_DWORD(tbl+BPB_TotSec32, n_part);
emh203	0:085749c8446f	2914	}
emh203	0:085749c8446f	2915	tbl[BPB_Media] = partition; /* Media descripter */
emh203	0:085749c8446f	2916	ST_WORD(tbl+BPB_SecPerTrk, 63); /* Number of sectors per track */
emh203	0:085749c8446f	2917	ST_WORD(tbl+BPB_NumHeads, 255); /* Number of heads */
emh203	0:085749c8446f	2918	ST_DWORD(tbl+BPB_HiddSec, b_part); /* Hidden sectors */
emh203	0:085749c8446f	2919	n = get_fattime(); /* Use current time as a VSN */
emh203	0:085749c8446f	2920	if (fmt != FS_FAT32) {
emh203	0:085749c8446f	2921	ST_DWORD(tbl+BS_VolID, n); /* Volume serial number */
emh203	0:085749c8446f	2922	ST_WORD(tbl+BPB_FATSz16, n_fat); /* Number of secters per FAT */
emh203	0:085749c8446f	2923	tbl[BS_DrvNum] = 0x80; /* Drive number */
emh203	0:085749c8446f	2924	tbl[BS_BootSig] = 0x29; /* Extended boot signature */
emh203	0:085749c8446f	2925	mem_cpy(tbl+BS_VolLab, "NO NAME FAT ", 19); /* Volume lavel, FAT signature */
emh203	0:085749c8446f	2926	} else {
emh203	0:085749c8446f	2927	ST_DWORD(tbl+BS_VolID32, n); /* Volume serial number */
emh203	0:085749c8446f	2928	ST_DWORD(tbl+BPB_FATSz32, n_fat); /* Number of secters per FAT */
emh203	0:085749c8446f	2929	ST_DWORD(tbl+BPB_RootClus, 2); /* Root directory cluster (2) */
emh203	0:085749c8446f	2930	ST_WORD(tbl+BPB_FSInfo, 1); /* FSInfo record offset (bs+1) */
emh203	0:085749c8446f	2931	ST_WORD(tbl+BPB_BkBootSec, 6); /* Backup boot record offset (bs+6) */
emh203	0:085749c8446f	2932	tbl[BS_DrvNum32] = 0x80; /* Drive number */
emh203	0:085749c8446f	2933	tbl[BS_BootSig32] = 0x29; /* Extended boot signature */
emh203	0:085749c8446f	2934	mem_cpy(tbl+BS_VolLab32, "NO NAME FAT32 ", 19); /* Volume lavel, FAT signature */
emh203	0:085749c8446f	2935	}
emh203	0:085749c8446f	2936	ST_WORD(tbl+BS_55AA, 0xAA55); /* Signature */
emh203	0:085749c8446f	2937	if (SS(fs) > 512U) {
emh203	0:085749c8446f	2938	ST_WORD(tbl+SS(fs)-2, 0xAA55);
emh203	0:085749c8446f	2939	}
emh203	0:085749c8446f	2940	if (disk_write(drv, tbl, b_part+0, 1) != RES_OK)
emh203	0:085749c8446f	2941	return FR_DISK_ERR;
emh203	0:085749c8446f	2942	if (fmt == FS_FAT32)
emh203	0:085749c8446f	2943	disk_write(drv, tbl, b_part+6, 1);
emh203	0:085749c8446f	2944
emh203	0:085749c8446f	2945	/* Initialize FAT area */
emh203	0:085749c8446f	2946	for (m = 0; m < N_FATS; m++) {
emh203	0:085749c8446f	2947	mem_set(tbl, 0, SS(fs)); /* 1st sector of the FAT */
emh203	0:085749c8446f	2948	if (fmt != FS_FAT32) {
emh203	0:085749c8446f	2949	n = (fmt == FS_FAT12) ? 0x00FFFF00 : 0xFFFFFF00;
emh203	0:085749c8446f	2950	n \|= partition;
emh203	0:085749c8446f	2951	ST_DWORD(tbl, n); /* Reserve cluster #0-1 (FAT12/16) */
emh203	0:085749c8446f	2952	} else {
emh203	0:085749c8446f	2953	ST_DWORD(tbl+0, 0xFFFFFFF8); /* Reserve cluster #0-1 (FAT32) */
emh203	0:085749c8446f	2954	ST_DWORD(tbl+4, 0xFFFFFFFF);
emh203	0:085749c8446f	2955	ST_DWORD(tbl+8, 0x0FFFFFFF); /* Reserve cluster #2 for root dir */
emh203	0:085749c8446f	2956	}
emh203	0:085749c8446f	2957	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
emh203	0:085749c8446f	2958	return FR_DISK_ERR;
emh203	0:085749c8446f	2959	mem_set(tbl, 0, SS(fs)); /* Following FAT entries are filled by zero */
emh203	0:085749c8446f	2960	for (n = 1; n < n_fat; n++) {
emh203	0:085749c8446f	2961	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
emh203	0:085749c8446f	2962	return FR_DISK_ERR;
emh203	0:085749c8446f	2963	}
emh203	0:085749c8446f	2964	}
emh203	0:085749c8446f	2965
emh203	0:085749c8446f	2966	/* Initialize Root directory */
emh203	0:085749c8446f	2967	m = (BYTE)((fmt == FS_FAT32) ? allocsize : n_dir);
emh203	0:085749c8446f	2968	do {
emh203	0:085749c8446f	2969	if (disk_write(drv, tbl, b_fat++, 1) != RES_OK)
emh203	0:085749c8446f	2970	return FR_DISK_ERR;
emh203	0:085749c8446f	2971	} while (--m);
emh203	0:085749c8446f	2972
emh203	0:085749c8446f	2973	/* Create FSInfo record if needed */
emh203	0:085749c8446f	2974	if (fmt == FS_FAT32) {
emh203	0:085749c8446f	2975	ST_WORD(tbl+BS_55AA, 0xAA55);
emh203	0:085749c8446f	2976	ST_DWORD(tbl+FSI_LeadSig, 0x41615252);
emh203	0:085749c8446f	2977	ST_DWORD(tbl+FSI_StrucSig, 0x61417272);
emh203	0:085749c8446f	2978	ST_DWORD(tbl+FSI_Free_Count, n_clst - 1);
emh203	0:085749c8446f	2979	ST_DWORD(tbl+FSI_Nxt_Free, 0xFFFFFFFF);
emh203	0:085749c8446f	2980	disk_write(drv, tbl, b_part+1, 1);
emh203	0:085749c8446f	2981	disk_write(drv, tbl, b_part+7, 1);
emh203	0:085749c8446f	2982	}
emh203	0:085749c8446f	2983
emh203	0:085749c8446f	2984	return (disk_ioctl(drv, CTRL_SYNC, (void*)NULL) == RES_OK) ? FR_OK : FR_DISK_ERR;
emh203	0:085749c8446f	2985	}
emh203	0:085749c8446f	2986
emh203	0:085749c8446f	2987	#endif /* _USE_MKFS && !_FS_READONLY */
emh203	0:085749c8446f	2988
emh203	0:085749c8446f	2989
emh203	0:085749c8446f	2990
emh203	0:085749c8446f	2991
emh203	0:085749c8446f	2992	#if _USE_STRFUNC
emh203	0:085749c8446f	2993	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2994	/* Get a string from the file */
emh203	0:085749c8446f	2995	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	2996	char* f_gets (
emh203	0:085749c8446f	2997	char* buff, /* Pointer to the string buffer to read */
emh203	0:085749c8446f	2998	int len, /* Size of string buffer */
emh203	0:085749c8446f	2999	FIL* fil /* Pointer to the file object */
emh203	0:085749c8446f	3000	)
emh203	0:085749c8446f	3001	{
emh203	0:085749c8446f	3002	int i = 0;
emh203	0:085749c8446f	3003	char *p = buff;
emh203	0:085749c8446f	3004	UINT rc;
emh203	0:085749c8446f	3005
emh203	0:085749c8446f	3006
emh203	0:085749c8446f	3007	while (i < len - 1) { /* Read bytes until buffer gets filled */
emh203	0:085749c8446f	3008	f_read(fil, p, 1, &rc);
emh203	0:085749c8446f	3009	if (rc != 1) break; /* Break when no data to read */
emh203	0:085749c8446f	3010	#if _USE_STRFUNC >= 2
emh203	0:085749c8446f	3011	if (p == '\r') continue; / Strip '\r' */
emh203	0:085749c8446f	3012	#endif
emh203	0:085749c8446f	3013	i++;
emh203	0:085749c8446f	3014	if (p++ == '\n') break; / Break when reached end of line */
emh203	0:085749c8446f	3015	}
emh203	0:085749c8446f	3016	*p = 0;
emh203	0:085749c8446f	3017	return i ? buff : NULL; /* When no data read (eof or error), return with error. */
emh203	0:085749c8446f	3018	}
emh203	0:085749c8446f	3019
emh203	0:085749c8446f	3020
emh203	0:085749c8446f	3021
emh203	0:085749c8446f	3022	#if !_FS_READONLY
emh203	0:085749c8446f	3023	#include <stdarg.h>
emh203	0:085749c8446f	3024	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3025	/* Put a character to the file */
emh203	0:085749c8446f	3026	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3027	int f_putc (
emh203	0:085749c8446f	3028	int chr, /* A character to be output */
emh203	0:085749c8446f	3029	FIL* fil /* Ponter to the file object */
emh203	0:085749c8446f	3030	)
emh203	0:085749c8446f	3031	{
emh203	0:085749c8446f	3032	UINT bw;
emh203	0:085749c8446f	3033	char c;
emh203	0:085749c8446f	3034
emh203	0:085749c8446f	3035
emh203	0:085749c8446f	3036	#if _USE_STRFUNC >= 2
emh203	0:085749c8446f	3037	if (chr == '\n') f_putc ('\r', fil); /* LF -> CRLF conversion */
emh203	0:085749c8446f	3038	#endif
emh203	0:085749c8446f	3039	if (!fil) { /* Special value may be used to switch the destination to any other device */
emh203	0:085749c8446f	3040	/* put_console(chr); */
emh203	0:085749c8446f	3041	return chr;
emh203	0:085749c8446f	3042	}
emh203	0:085749c8446f	3043	c = (char)chr;
emh203	0:085749c8446f	3044	f_write(fil, &c, 1, &bw); /* Write a byte to the file */
emh203	0:085749c8446f	3045	return bw ? chr : EOF; /* Return the result */
emh203	0:085749c8446f	3046	}
emh203	0:085749c8446f	3047
emh203	0:085749c8446f	3048
emh203	0:085749c8446f	3049
emh203	0:085749c8446f	3050
emh203	0:085749c8446f	3051	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3052	/* Put a string to the file */
emh203	0:085749c8446f	3053	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3054	int f_puts (
emh203	0:085749c8446f	3055	const char* str, /* Pointer to the string to be output */
emh203	0:085749c8446f	3056	FIL* fil /* Pointer to the file object */
emh203	0:085749c8446f	3057	)
emh203	0:085749c8446f	3058	{
emh203	0:085749c8446f	3059	int n;
emh203	0:085749c8446f	3060
emh203	0:085749c8446f	3061
emh203	0:085749c8446f	3062	for (n = 0; *str; str++, n++) {
emh203	0:085749c8446f	3063	if (f_putc(*str, fil) == EOF) return EOF;
emh203	0:085749c8446f	3064	}
emh203	0:085749c8446f	3065	return n;
emh203	0:085749c8446f	3066	}
emh203	0:085749c8446f	3067
emh203	0:085749c8446f	3068
emh203	0:085749c8446f	3069
emh203	0:085749c8446f	3070
emh203	0:085749c8446f	3071	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3072	/* Put a formatted string to the file */
emh203	0:085749c8446f	3073	/-----------------------------------------------------------------------/
emh203	0:085749c8446f	3074	int f_printf (
emh203	0:085749c8446f	3075	FIL* fil, /* Pointer to the file object */
emh203	0:085749c8446f	3076	const char* str, /* Pointer to the format string */
emh203	0:085749c8446f	3077	... /* Optional arguments... */
emh203	0:085749c8446f	3078	)
emh203	0:085749c8446f	3079	{
emh203	0:085749c8446f	3080	va_list arp;
emh203	0:085749c8446f	3081	UCHAR c, f, r;
emh203	0:085749c8446f	3082	ULONG val;
emh203	0:085749c8446f	3083	char s[16];
emh203	0:085749c8446f	3084	int i, w, res, cc;
emh203	0:085749c8446f	3085
emh203	0:085749c8446f	3086
emh203	0:085749c8446f	3087	va_start(arp, str);
emh203	0:085749c8446f	3088
emh203	0:085749c8446f	3089	for (cc = res = 0; cc != EOF; res += cc) {
emh203	0:085749c8446f	3090	c = *str++;
emh203	0:085749c8446f	3091	if (c == 0) break; /* End of string */
emh203	0:085749c8446f	3092	if (c != '%') { /* Non escape cahracter */
emh203	0:085749c8446f	3093	cc = f_putc(c, fil);
emh203	0:085749c8446f	3094	if (cc != EOF) cc = 1;
emh203	0:085749c8446f	3095	continue;
emh203	0:085749c8446f	3096	}
emh203	0:085749c8446f	3097	w = f = 0;
emh203	0:085749c8446f	3098	c = *str++;
emh203	0:085749c8446f	3099	if (c == '0') { /* Flag: '0' padding */
emh203	0:085749c8446f	3100	f = 1; c = *str++;
emh203	0:085749c8446f	3101	}
emh203	0:085749c8446f	3102	while (c >= '0' && c <= '9') { /* Precision */
emh203	0:085749c8446f	3103	w = w * 10 + (c - '0');
emh203	0:085749c8446f	3104	c = *str++;
emh203	0:085749c8446f	3105	}
emh203	0:085749c8446f	3106	if (c == 'l') { /* Prefix: Size is long int */
emh203	0:085749c8446f	3107	f \|= 2; c = *str++;
emh203	0:085749c8446f	3108	}
emh203	0:085749c8446f	3109	if (c == 's') { /* Type is string */
emh203	0:085749c8446f	3110	cc = f_puts(va_arg(arp, char*), fil);
emh203	0:085749c8446f	3111	continue;
emh203	0:085749c8446f	3112	}
emh203	0:085749c8446f	3113	if (c == 'c') { /* Type is character */
emh203	0:085749c8446f	3114	cc = f_putc(va_arg(arp, int), fil);
emh203	0:085749c8446f	3115	if (cc != EOF) cc = 1;
emh203	0:085749c8446f	3116	continue;
emh203	0:085749c8446f	3117	}
emh203	0:085749c8446f	3118	r = 0;
emh203	0:085749c8446f	3119	if (c == 'd') r = 10; /* Type is signed decimal */
emh203	0:085749c8446f	3120	if (c == 'u') r = 10; /* Type is unsigned decimal */
emh203	0:085749c8446f	3121	if (c == 'X') r = 16; /* Type is unsigned hexdecimal */
emh203	0:085749c8446f	3122	if (r == 0) break; /* Unknown type */
emh203	0:085749c8446f	3123	if (f & 2) { /* Get the value */
emh203	0:085749c8446f	3124	val = (ULONG)va_arg(arp, long);
emh203	0:085749c8446f	3125	} else {
emh203	0:085749c8446f	3126	val = (c == 'd') ? (ULONG)(long)va_arg(arp, int) : (ULONG)va_arg(arp, unsigned int);
emh203	0:085749c8446f	3127	}
emh203	0:085749c8446f	3128	/* Put numeral string */
emh203	0:085749c8446f	3129	if (c == 'd') {
emh203	0:085749c8446f	3130	if (val & 0x80000000) {
emh203	0:085749c8446f	3131	val = 0 - val;
emh203	0:085749c8446f	3132	f \|= 4;
emh203	0:085749c8446f	3133	}
emh203	0:085749c8446f	3134	}
emh203	0:085749c8446f	3135	i = sizeof(s) - 1; s[i] = 0;
emh203	0:085749c8446f	3136	do {
emh203	0:085749c8446f	3137	c = (UCHAR)(val % r + '0');
emh203	0:085749c8446f	3138	if (c > '9') c += 7;
emh203	0:085749c8446f	3139	s[--i] = c;
emh203	0:085749c8446f	3140	val /= r;
emh203	0:085749c8446f	3141	} while (i && val);
emh203	0:085749c8446f	3142	if (i && (f & 4)) s[--i] = '-';
emh203	0:085749c8446f	3143	w = sizeof(s) - 1 - w;
emh203	0:085749c8446f	3144	while (i && i > w) s[--i] = (f & 1) ? '0' : ' ';
emh203	0:085749c8446f	3145	cc = f_puts(&s[i], fil);
emh203	0:085749c8446f	3146	}
emh203	0:085749c8446f	3147
emh203	0:085749c8446f	3148	va_end(arp);
emh203	0:085749c8446f	3149	return (cc == EOF) ? cc : res;
emh203	0:085749c8446f	3150	}
emh203	0:085749c8446f	3151
emh203	0:085749c8446f	3152	#endif /* !_FS_READONLY */
emh203	0:085749c8446f	3153	#endif /* _USE_STRFUNC */

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	13 Jun 2012
Imports:	3
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	1
Followers:	2

Code/chan_fat_fs/ff.c@0:085749c8446f, 2012-06-13 (annotated)

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