[linux.git] / fs / cifs / cifs_unicode.h

/*
 * cifs_unicode:  Unicode kernel case support
 *
 * Function:
 *     Convert a unicode character to upper or lower case using
 *     compressed tables.
 *
 *   Copyright (c) International Business Machines  Corp., 2000,2009
 *
 *   This program is free software;  you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program;  if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 *
 * Notes:
 *     These APIs are based on the C library functions.  The semantics
 *     should match the C functions but with expanded size operands.
 *
 *     The upper/lower functions are based on a table created by mkupr.
 *     This is a compressed table of upper and lower case conversion.
 *
 */
#ifndef _CIFS_UNICODE_H
#define _CIFS_UNICODE_H

#include <asm/byteorder.h>
#include <linux/types.h>
#include <linux/nls.h>

#define  UNIUPR_NOLOWER		/* Example to not expand lower case tables */

/*
 * Windows maps these to the user defined 16 bit Unicode range since they are
 * reserved symbols (along with \ and /), otherwise illegal to store
 * in filenames in NTFS
 */
#define UNI_ASTERISK    (__u16) ('*' + 0xF000)
#define UNI_QUESTION    (__u16) ('?' + 0xF000)
#define UNI_COLON       (__u16) (':' + 0xF000)
#define UNI_GRTRTHAN    (__u16) ('>' + 0xF000)
#define UNI_LESSTHAN    (__u16) ('<' + 0xF000)
#define UNI_PIPE        (__u16) ('|' + 0xF000)
#define UNI_SLASH       (__u16) ('\\' + 0xF000)

/*
 * Macs use an older "SFM" mapping of the symbols above. Fortunately it does
 * not conflict (although almost does) with the mapping above.
 */

#define SFM_ASTERISK    ((__u16) 0xF021)
#define SFM_QUESTION    ((__u16) 0xF025)
#define SFM_COLON       ((__u16) 0xF022)
#define SFM_GRTRTHAN    ((__u16) 0xF024)
#define SFM_LESSTHAN    ((__u16) 0xF023)
#define SFM_PIPE        ((__u16) 0xF027)
#define SFM_SLASH       ((__u16) 0xF026)
#define SFM_PERIOD	((__u16) 0xF028)
#define SFM_SPACE	((__u16) 0xF029)

/*
 * Mapping mechanism to use when one of the seven reserved characters is
 * encountered.  We can only map using one of the mechanisms at a time
 * since otherwise readdir could return directory entries which we would
 * not be able to open
 *
 * NO_MAP_UNI_RSVD  = do not perform any remapping of the character
 * SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
 * SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
 *
 */
#define NO_MAP_UNI_RSVD		0
#define SFM_MAP_UNI_RSVD	1
#define SFU_MAP_UNI_RSVD	2

/* Just define what we want from uniupr.h.  We don't want to define the tables
 * in each source file.
 */
#ifndef	UNICASERANGE_DEFINED
struct UniCaseRange {
	wchar_t start;
	wchar_t end;
	signed char *table;
};
#endif				/* UNICASERANGE_DEFINED */

#ifndef UNIUPR_NOUPPER
extern signed char CifsUniUpperTable[512];
extern const struct UniCaseRange CifsUniUpperRange[];
#endif				/* UNIUPR_NOUPPER */

#ifndef UNIUPR_NOLOWER
extern signed char CifsUniLowerTable[512];
extern const struct UniCaseRange CifsUniLowerRange[];
#endif				/* UNIUPR_NOLOWER */

#ifdef __KERNEL__
int cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
		    const struct nls_table *cp, int map_type);
int cifs_utf16_bytes(const __le16 *from, int maxbytes,
		     const struct nls_table *codepage);
int cifs_strtoUTF16(__le16 *, const char *, int, const struct nls_table *);
char *cifs_strndup_from_utf16(const char *src, const int maxlen,
			      const bool is_unicode,
			      const struct nls_table *codepage);
extern int cifsConvertToUTF16(__le16 *target, const char *source, int maxlen,
			      const struct nls_table *cp, int mapChars);
extern int cifs_remap(struct cifs_sb_info *cifs_sb);
#ifdef CONFIG_CIFS_SMB2
extern __le16 *cifs_strndup_to_utf16(const char *src, const int maxlen,
				     int *utf16_len, const struct nls_table *cp,
				     int remap);
#endif /* CONFIG_CIFS_SMB2 */
#endif

wchar_t cifs_toupper(wchar_t in);

/*
 * UniStrcat:  Concatenate the second string to the first
 *
 * Returns:
 *     Address of the first string
 */
static inline wchar_t *
UniStrcat(wchar_t *ucs1, const wchar_t *ucs2)
{
	wchar_t *anchor = ucs1;	/* save a pointer to start of ucs1 */

	while (*ucs1++) ;	/* To end of first string */
	ucs1--;			/* Return to the null */
	while ((*ucs1++ = *ucs2++)) ;	/* copy string 2 over */
	return anchor;
}

/*
 * UniStrchr:  Find a character in a string
 *
 * Returns:
 *     Address of first occurrence of character in string
 *     or NULL if the character is not in the string
 */
static inline wchar_t *
UniStrchr(const wchar_t *ucs, wchar_t uc)
{
	while ((*ucs != uc) && *ucs)
		ucs++;

	if (*ucs == uc)
		return (wchar_t *) ucs;
	return NULL;
}

/*
 * UniStrcmp:  Compare two strings
 *
 * Returns:
 *     < 0:  First string is less than second
 *     = 0:  Strings are equal
 *     > 0:  First string is greater than second
 */
static inline int
UniStrcmp(const wchar_t *ucs1, const wchar_t *ucs2)
{
	while ((*ucs1 == *ucs2) && *ucs1) {
		ucs1++;
		ucs2++;
	}
	return (int) *ucs1 - (int) *ucs2;
}

/*
 * UniStrcpy:  Copy a string
 */
static inline wchar_t *
UniStrcpy(wchar_t *ucs1, const wchar_t *ucs2)
{
	wchar_t *anchor = ucs1;	/* save the start of result string */

	while ((*ucs1++ = *ucs2++)) ;
	return anchor;
}

/*
 * UniStrlen:  Return the length of a string (in 16 bit Unicode chars not bytes)
 */
static inline size_t
UniStrlen(const wchar_t *ucs1)
{
	int i = 0;

	while (*ucs1++)
		i++;
	return i;
}

/*
 * UniStrnlen:  Return the length (in 16 bit Unicode chars not bytes) of a
 *		string (length limited)
 */
static inline size_t
UniStrnlen(const wchar_t *ucs1, int maxlen)
{
	int i = 0;

	while (*ucs1++) {
		i++;
		if (i >= maxlen)
			break;
	}
	return i;
}

/*
 * UniStrncat:  Concatenate length limited string
 */
static inline wchar_t *
UniStrncat(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
{
	wchar_t *anchor = ucs1;	/* save pointer to string 1 */

	while (*ucs1++) ;
	ucs1--;			/* point to null terminator of s1 */
	while (n-- && (*ucs1 = *ucs2)) {	/* copy s2 after s1 */
		ucs1++;
		ucs2++;
	}
	*ucs1 = 0;		/* Null terminate the result */
	return (anchor);
}

/*
 * UniStrncmp:  Compare length limited string
 */
static inline int
UniStrncmp(const wchar_t *ucs1, const wchar_t *ucs2, size_t n)
{
	if (!n)
		return 0;	/* Null strings are equal */
	while ((*ucs1 == *ucs2) && *ucs1 && --n) {
		ucs1++;
		ucs2++;
	}
	return (int) *ucs1 - (int) *ucs2;
}

/*
 * UniStrncmp_le:  Compare length limited string - native to little-endian
 */
static inline int
UniStrncmp_le(const wchar_t *ucs1, const wchar_t *ucs2, size_t n)
{
	if (!n)
		return 0;	/* Null strings are equal */
	while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
		ucs1++;
		ucs2++;
	}
	return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
}

/*
 * UniStrncpy:  Copy length limited string with pad
 */
static inline wchar_t *
UniStrncpy(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
{
	wchar_t *anchor = ucs1;

	while (n-- && *ucs2)	/* Copy the strings */
		*ucs1++ = *ucs2++;

	n++;
	while (n--)		/* Pad with nulls */
		*ucs1++ = 0;
	return anchor;
}

/*
 * UniStrncpy_le:  Copy length limited string with pad to little-endian
 */
static inline wchar_t *
UniStrncpy_le(wchar_t *ucs1, const wchar_t *ucs2, size_t n)
{
	wchar_t *anchor = ucs1;

	while (n-- && *ucs2)	/* Copy the strings */
		*ucs1++ = __le16_to_cpu(*ucs2++);

	n++;
	while (n--)		/* Pad with nulls */
		*ucs1++ = 0;
	return anchor;
}

/*
 * UniStrstr:  Find a string in a string
 *
 * Returns:
 *     Address of first match found
 *     NULL if no matching string is found
 */
static inline wchar_t *
UniStrstr(const wchar_t *ucs1, const wchar_t *ucs2)
{
	const wchar_t *anchor1 = ucs1;
	const wchar_t *anchor2 = ucs2;

	while (*ucs1) {
		if (*ucs1 == *ucs2) {
			/* Partial match found */
			ucs1++;
			ucs2++;
		} else {
			if (!*ucs2)	/* Match found */
				return (wchar_t *) anchor1;
			ucs1 = ++anchor1;	/* No match */
			ucs2 = anchor2;
		}
	}

	if (!*ucs2)		/* Both end together */
		return (wchar_t *) anchor1;	/* Match found */
	return NULL;		/* No match */
}

#ifndef UNIUPR_NOUPPER
/*
 * UniToupper:  Convert a unicode character to upper case
 */
static inline wchar_t
UniToupper(register wchar_t uc)
{
	register const struct UniCaseRange *rp;

	if (uc < sizeof(CifsUniUpperTable)) {
		/* Latin characters */
		return uc + CifsUniUpperTable[uc];	/* Use base tables */
	} else {
		rp = CifsUniUpperRange;	/* Use range tables */
		while (rp->start) {
			if (uc < rp->start)	/* Before start of range */
				return uc;	/* Uppercase = input */
			if (uc <= rp->end)	/* In range */
				return uc + rp->table[uc - rp->start];
			rp++;	/* Try next range */
		}
	}
	return uc;		/* Past last range */
}

/*
 * UniStrupr:  Upper case a unicode string
 */
static inline __le16 *
UniStrupr(register __le16 *upin)
{
	register __le16 *up;

	up = upin;
	while (*up) {		/* For all characters */
		*up = cpu_to_le16(UniToupper(le16_to_cpu(*up)));
		up++;
	}
	return upin;		/* Return input pointer */
}
#endif				/* UNIUPR_NOUPPER */

#ifndef UNIUPR_NOLOWER
/*
 * UniTolower:  Convert a unicode character to lower case
 */
static inline wchar_t
UniTolower(register wchar_t uc)
{
	register const struct UniCaseRange *rp;

	if (uc < sizeof(CifsUniLowerTable)) {
		/* Latin characters */
		return uc + CifsUniLowerTable[uc];	/* Use base tables */
	} else {
		rp = CifsUniLowerRange;	/* Use range tables */
		while (rp->start) {
			if (uc < rp->start)	/* Before start of range */
				return uc;	/* Uppercase = input */
			if (uc <= rp->end)	/* In range */
				return uc + rp->table[uc - rp->start];
			rp++;	/* Try next range */
		}
	}
	return uc;		/* Past last range */
}

/*
 * UniStrlwr:  Lower case a unicode string
 */
static inline wchar_t *
UniStrlwr(register wchar_t *upin)
{
	register wchar_t *up;

	up = upin;
	while (*up) {		/* For all characters */
		*up = UniTolower(*up);
		up++;
	}
	return upin;		/* Return input pointer */
}

#endif

#endif /* _CIFS_UNICODE_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* cifs_unicode: Unicode kernel case support
	3	*
	4	* Function:
	5	* Convert a unicode character to upper or lower case using
	6	* compressed tables.
	7	*
d185cda7	8	* Copyright (c) International Business Machines Corp., 2000,2009
1da177e4 LT	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License as published by
d38d8c74	12	* the Free Software Foundation; either version 2 of the License, or
1da177e4	13	* (at your option) any later version.
d38d8c74	14	*
1da177e4 LT	15	* This program is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	18	* the GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
d38d8c74	21	* along with this program; if not, write to the Free Software
1da177e4 LT	22	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	23	*
	24	*
	25	* Notes:
	26	* These APIs are based on the C library functions. The semantics
	27	* should match the C functions but with expanded size operands.
	28	*
	29	* The upper/lower functions are based on a table created by mkupr.
	30	* This is a compressed table of upper and lower case conversion.
	31	*
	32	*/
bf4f1211 ID	33	#ifndef _CIFS_UNICODE_H
bf4f1211 ID	34	#define _CIFS_UNICODE_H
1da177e4 LT	35
	36	#include <asm/byteorder.h>
	37	#include <linux/types.h>
	38	#include <linux/nls.h>
	39
	40	#define UNIUPR_NOLOWER /* Example to not expand lower case tables */
	41
66345f50 JL	42	/*
	43	* Windows maps these to the user defined 16 bit Unicode range since they are
	44	* reserved symbols (along with \ and /), otherwise illegal to store
	45	* in filenames in NTFS
	46	*/
581ade4d	47	#define UNI_ASTERISK (__u16) ('*' + 0xF000)
66345f50 JL	48	#define UNI_QUESTION (__u16) ('?' + 0xF000)
	49	#define UNI_COLON (__u16) (':' + 0xF000)
	50	#define UNI_GRTRTHAN (__u16) ('>' + 0xF000)
	51	#define UNI_LESSTHAN (__u16) ('<' + 0xF000)
	52	#define UNI_PIPE (__u16) ('\|' + 0xF000)
	53	#define UNI_SLASH (__u16) ('\\' + 0xF000)
	54
b693855f SF	55	/*
	56	* Macs use an older "SFM" mapping of the symbols above. Fortunately it does
	57	* not conflict (although almost does) with the mapping above.
	58	*/
	59
	60	#define SFM_ASTERISK ((__u16) 0xF021)
	61	#define SFM_QUESTION ((__u16) 0xF025)
	62	#define SFM_COLON ((__u16) 0xF022)
	63	#define SFM_GRTRTHAN ((__u16) 0xF024)
	64	#define SFM_LESSTHAN ((__u16) 0xF023)
	65	#define SFM_PIPE ((__u16) 0xF027)
	66	#define SFM_SLASH ((__u16) 0xF026)
45e8a258 SF	67	#define SFM_PERIOD ((__u16) 0xF028)
45e8a258 SF	68	#define SFM_SPACE ((__u16) 0xF029)
b693855f SF	69
	70	/*
	71	* Mapping mechanism to use when one of the seven reserved characters is
	72	* encountered. We can only map using one of the mechanisms at a time
	73	* since otherwise readdir could return directory entries which we would
	74	* not be able to open
	75	*
	76	* NO_MAP_UNI_RSVD = do not perform any remapping of the character
	77	* SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
	78	* SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
	79	*
	80	*/
	81	#define NO_MAP_UNI_RSVD 0
	82	#define SFM_MAP_UNI_RSVD 1
	83	#define SFU_MAP_UNI_RSVD 2
	84
1da177e4 LT	85	/* Just define what we want from uniupr.h. We don't want to define the tables
	86	* in each source file.
	87	*/
	88	#ifndef UNICASERANGE_DEFINED
	89	struct UniCaseRange {
	90	wchar_t start;
	91	wchar_t end;
	92	signed char *table;
	93	};
	94	#endif /* UNICASERANGE_DEFINED */
	95
	96	#ifndef UNIUPR_NOUPPER
	97	extern signed char CifsUniUpperTable[512];
	98	extern const struct UniCaseRange CifsUniUpperRange[];
	99	#endif /* UNIUPR_NOUPPER */
	100
	101	#ifndef UNIUPR_NOLOWER
bf4f1211 ID	102	extern signed char CifsUniLowerTable[512];
bf4f1211 ID	103	extern const struct UniCaseRange CifsUniLowerRange[];
1da177e4 LT	104	#endif /* UNIUPR_NOLOWER */
	105
	106	#ifdef __KERNEL__
acbbb76a	107	int cifs_from_utf16(char to, const __le16 from, int tolen, int fromlen,
b693855f	108	const struct nls_table *cp, int map_type);
acbbb76a SF	109	int cifs_utf16_bytes(const __le16 *from, int maxbytes,
	110	const struct nls_table *codepage);
	111	int cifs_strtoUTF16(__le16 , const char , int, const struct nls_table *);
	112	char cifs_strndup_from_utf16(const char src, const int maxlen,
	113	const bool is_unicode,
	114	const struct nls_table *codepage);
	115	extern int cifsConvertToUTF16(__le16 target, const char source, int maxlen,
	116	const struct nls_table *cp, int mapChars);
2baa2682	117	extern int cifs_remap(struct cifs_sb_info *cifs_sb);
2503a0db PS	118	#ifdef CONFIG_CIFS_SMB2
	119	extern __le16 cifs_strndup_to_utf16(const char src, const int maxlen,
	120	int utf16_len, const struct nls_table cp,
	121	int remap);
	122	#endif /* CONFIG_CIFS_SMB2 */
1da177e4 LT	123	#endif
1da177e4 LT	124
c2ccf53d JL	125	wchar_t cifs_toupper(wchar_t in);
c2ccf53d JL	126
1da177e4 LT	127	/*
	128	* UniStrcat: Concatenate the second string to the first
	129	*
	130	* Returns:
	131	* Address of the first string
	132	*/
	133	static inline wchar_t *
50c2f753	134	UniStrcat(wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	135	{
	136	wchar_t anchor = ucs1; / save a pointer to start of ucs1 */
	137
	138	while (ucs1++) ; / To end of first string */
	139	ucs1--; /* Return to the null */
	140	while ((ucs1++ = ucs2++)) ; /* copy string 2 over */
	141	return anchor;
	142	}
	143
	144	/*
	145	* UniStrchr: Find a character in a string
	146	*
	147	* Returns:
	148	* Address of first occurrence of character in string
	149	* or NULL if the character is not in the string
	150	*/
	151	static inline wchar_t *
50c2f753	152	UniStrchr(const wchar_t *ucs, wchar_t uc)
1da177e4 LT	153	{
	154	while ((ucs != uc) && ucs)
	155	ucs++;
	156
	157	if (*ucs == uc)
	158	return (wchar_t *) ucs;
	159	return NULL;
	160	}
	161
	162	/*
	163	* UniStrcmp: Compare two strings
	164	*
	165	* Returns:
	166	* < 0: First string is less than second
	167	* = 0: Strings are equal
	168	* > 0: First string is greater than second
	169	*/
	170	static inline int
50c2f753	171	UniStrcmp(const wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	172	{
	173	while ((ucs1 == ucs2) && *ucs1) {
	174	ucs1++;
	175	ucs2++;
	176	}
	177	return (int) ucs1 - (int) ucs2;
	178	}
	179
	180	/*
	181	* UniStrcpy: Copy a string
	182	*/
	183	static inline wchar_t *
50c2f753	184	UniStrcpy(wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	185	{
	186	wchar_t anchor = ucs1; / save the start of result string */
	187
	188	while ((ucs1++ = ucs2++)) ;
	189	return anchor;
	190	}
	191
	192	/*
	193	* UniStrlen: Return the length of a string (in 16 bit Unicode chars not bytes)
	194	*/
	195	static inline size_t
50c2f753	196	UniStrlen(const wchar_t *ucs1)
1da177e4 LT	197	{
	198	int i = 0;
	199
	200	while (*ucs1++)
	201	i++;
	202	return i;
	203	}
	204
	205	/*
d38d8c74 SF	206	* UniStrnlen: Return the length (in 16 bit Unicode chars not bytes) of a
d38d8c74 SF	207	* string (length limited)
1da177e4 LT	208	*/
1da177e4 LT	209	static inline size_t
50c2f753	210	UniStrnlen(const wchar_t *ucs1, int maxlen)
1da177e4 LT	211	{
	212	int i = 0;
	213
	214	while (*ucs1++) {
	215	i++;
	216	if (i >= maxlen)
	217	break;
	218	}
	219	return i;
	220	}
	221
	222	/*
	223	* UniStrncat: Concatenate length limited string
	224	*/
	225	static inline wchar_t *
50c2f753	226	UniStrncat(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	227	{
	228	wchar_t anchor = ucs1; / save pointer to string 1 */
	229
	230	while (*ucs1++) ;
	231	ucs1--; /* point to null terminator of s1 */
	232	while (n-- && (ucs1 = ucs2)) { /* copy s2 after s1 */
	233	ucs1++;
	234	ucs2++;
	235	}
	236	ucs1 = 0; / Null terminate the result */
	237	return (anchor);
	238	}
	239
	240	/*
	241	* UniStrncmp: Compare length limited string
	242	*/
	243	static inline int
50c2f753	244	UniStrncmp(const wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	245	{
	246	if (!n)
	247	return 0; /* Null strings are equal */
	248	while ((ucs1 == ucs2) && *ucs1 && --n) {
	249	ucs1++;
	250	ucs2++;
	251	}
	252	return (int) ucs1 - (int) ucs2;
	253	}
	254
	255	/*
	256	* UniStrncmp_le: Compare length limited string - native to little-endian
	257	*/
	258	static inline int
50c2f753	259	UniStrncmp_le(const wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	260	{
	261	if (!n)
	262	return 0; /* Null strings are equal */
	263	while ((ucs1 == __le16_to_cpu(ucs2)) && *ucs1 && --n) {
	264	ucs1++;
	265	ucs2++;
	266	}
	267	return (int) ucs1 - (int) __le16_to_cpu(ucs2);
	268	}
	269
	270	/*
	271	* UniStrncpy: Copy length limited string with pad
	272	*/
	273	static inline wchar_t *
50c2f753	274	UniStrncpy(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	275	{
	276	wchar_t *anchor = ucs1;
	277
	278	while (n-- && ucs2) / Copy the strings */
	279	ucs1++ = ucs2++;
	280
	281	n++;
	282	while (n--) /* Pad with nulls */
	283	*ucs1++ = 0;
	284	return anchor;
	285	}
	286
	287	/*
	288	* UniStrncpy_le: Copy length limited string with pad to little-endian
	289	*/
	290	static inline wchar_t *
50c2f753	291	UniStrncpy_le(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	292	{
	293	wchar_t *anchor = ucs1;
	294
	295	while (n-- && ucs2) / Copy the strings */
	296	ucs1++ = __le16_to_cpu(ucs2++);
	297
	298	n++;
	299	while (n--) /* Pad with nulls */
	300	*ucs1++ = 0;
	301	return anchor;
	302	}
	303
	304	/*
	305	* UniStrstr: Find a string in a string
	306	*
	307	* Returns:
	308	* Address of first match found
	309	* NULL if no matching string is found
	310	*/
	311	static inline wchar_t *
50c2f753	312	UniStrstr(const wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	313	{
	314	const wchar_t *anchor1 = ucs1;
	315	const wchar_t *anchor2 = ucs2;
	316
	317	while (*ucs1) {
ad7a2926 SF	318	if (ucs1 == ucs2) {
ad7a2926 SF	319	/* Partial match found */
1da177e4 LT	320	ucs1++;
	321	ucs2++;
	322	} else {
	323	if (!ucs2) / Match found */
	324	return (wchar_t *) anchor1;
	325	ucs1 = ++anchor1; /* No match */
	326	ucs2 = anchor2;
	327	}
	328	}
	329
	330	if (!ucs2) / Both end together */
	331	return (wchar_t ) anchor1; / Match found */
	332	return NULL; /* No match */
	333	}
	334
	335	#ifndef UNIUPR_NOUPPER
	336	/*
	337	* UniToupper: Convert a unicode character to upper case
	338	*/
	339	static inline wchar_t
	340	UniToupper(register wchar_t uc)
	341	{
	342	register const struct UniCaseRange *rp;
	343
ad7a2926 SF	344	if (uc < sizeof(CifsUniUpperTable)) {
ad7a2926 SF	345	/* Latin characters */
1da177e4 LT	346	return uc + CifsUniUpperTable[uc]; /* Use base tables */
	347	} else {
	348	rp = CifsUniUpperRange; /* Use range tables */
	349	while (rp->start) {
	350	if (uc < rp->start) /* Before start of range */
	351	return uc; /* Uppercase = input */
	352	if (uc <= rp->end) /* In range */
	353	return uc + rp->table[uc - rp->start];
	354	rp++; /* Try next range */
	355	}
	356	}
	357	return uc; /* Past last range */
	358	}
	359
	360	/*
	361	* UniStrupr: Upper case a unicode string
	362	*/
fdf96a90 SF	363	static inline __le16 *
fdf96a90 SF	364	UniStrupr(register __le16 *upin)
1da177e4	365	{
fdf96a90	366	register __le16 *up;
1da177e4 LT	367
	368	up = upin;
	369	while (up) { / For all characters */
fdf96a90	370	up = cpu_to_le16(UniToupper(le16_to_cpu(up)));
1da177e4 LT	371	up++;
	372	}
	373	return upin; /* Return input pointer */
	374	}
	375	#endif /* UNIUPR_NOUPPER */
	376
	377	#ifndef UNIUPR_NOLOWER
	378	/*
	379	* UniTolower: Convert a unicode character to lower case
	380	*/
	381	static inline wchar_t
bf4f1211	382	UniTolower(register wchar_t uc)
1da177e4	383	{
bf4f1211	384	register const struct UniCaseRange *rp;
1da177e4	385
bf4f1211	386	if (uc < sizeof(CifsUniLowerTable)) {
ad7a2926	387	/* Latin characters */
bf4f1211	388	return uc + CifsUniLowerTable[uc]; /* Use base tables */
1da177e4	389	} else {
bf4f1211	390	rp = CifsUniLowerRange; /* Use range tables */
1da177e4 LT	391	while (rp->start) {
	392	if (uc < rp->start) /* Before start of range */
	393	return uc; /* Uppercase = input */
	394	if (uc <= rp->end) /* In range */
	395	return uc + rp->table[uc - rp->start];
	396	rp++; /* Try next range */
	397	}
	398	}
	399	return uc; /* Past last range */
	400	}
	401
	402	/*
	403	* UniStrlwr: Lower case a unicode string
	404	*/
	405	static inline wchar_t *
50c2f753	406	UniStrlwr(register wchar_t *upin)
1da177e4 LT	407	{
	408	register wchar_t *up;
	409
	410	up = upin;
	411	while (up) { / For all characters */
	412	up = UniTolower(up);
	413	up++;
	414	}
	415	return upin; /* Return input pointer */
	416	}
	417
	418	#endif
bf4f1211 ID	419
bf4f1211 ID	420	#endif /* _CIFS_UNICODE_H */