[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)

/* 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 *codepage, bool mapchar);
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);
#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
1da177e4 LT	55	/* Just define what we want from uniupr.h. We don't want to define the tables
	56	* in each source file.
	57	*/
	58	#ifndef UNICASERANGE_DEFINED
	59	struct UniCaseRange {
	60	wchar_t start;
	61	wchar_t end;
	62	signed char *table;
	63	};
	64	#endif /* UNICASERANGE_DEFINED */
	65
	66	#ifndef UNIUPR_NOUPPER
	67	extern signed char CifsUniUpperTable[512];
	68	extern const struct UniCaseRange CifsUniUpperRange[];
	69	#endif /* UNIUPR_NOUPPER */
	70
	71	#ifndef UNIUPR_NOLOWER
bf4f1211 ID	72	extern signed char CifsUniLowerTable[512];
bf4f1211 ID	73	extern const struct UniCaseRange CifsUniLowerRange[];
1da177e4 LT	74	#endif /* UNIUPR_NOLOWER */
	75
	76	#ifdef __KERNEL__
acbbb76a SF	77	int cifs_from_utf16(char to, const __le16 from, int tolen, int fromlen,
	78	const struct nls_table *codepage, bool mapchar);
	79	int cifs_utf16_bytes(const __le16 *from, int maxbytes,
	80	const struct nls_table *codepage);
	81	int cifs_strtoUTF16(__le16 , const char , int, const struct nls_table *);
	82	char cifs_strndup_from_utf16(const char src, const int maxlen,
	83	const bool is_unicode,
	84	const struct nls_table *codepage);
	85	extern int cifsConvertToUTF16(__le16 target, const char source, int maxlen,
	86	const struct nls_table *cp, int mapChars);
2503a0db PS	87	#ifdef CONFIG_CIFS_SMB2
	88	extern __le16 cifs_strndup_to_utf16(const char src, const int maxlen,
	89	int utf16_len, const struct nls_table cp,
	90	int remap);
	91	#endif /* CONFIG_CIFS_SMB2 */
1da177e4 LT	92	#endif
1da177e4 LT	93
c2ccf53d JL	94	wchar_t cifs_toupper(wchar_t in);
c2ccf53d JL	95
1da177e4 LT	96	/*
	97	* UniStrcat: Concatenate the second string to the first
	98	*
	99	* Returns:
	100	* Address of the first string
	101	*/
	102	static inline wchar_t *
50c2f753	103	UniStrcat(wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	104	{
	105	wchar_t anchor = ucs1; / save a pointer to start of ucs1 */
	106
	107	while (ucs1++) ; / To end of first string */
	108	ucs1--; /* Return to the null */
	109	while ((ucs1++ = ucs2++)) ; /* copy string 2 over */
	110	return anchor;
	111	}
	112
	113	/*
	114	* UniStrchr: Find a character in a string
	115	*
	116	* Returns:
	117	* Address of first occurrence of character in string
	118	* or NULL if the character is not in the string
	119	*/
	120	static inline wchar_t *
50c2f753	121	UniStrchr(const wchar_t *ucs, wchar_t uc)
1da177e4 LT	122	{
	123	while ((ucs != uc) && ucs)
	124	ucs++;
	125
	126	if (*ucs == uc)
	127	return (wchar_t *) ucs;
	128	return NULL;
	129	}
	130
	131	/*
	132	* UniStrcmp: Compare two strings
	133	*
	134	* Returns:
	135	* < 0: First string is less than second
	136	* = 0: Strings are equal
	137	* > 0: First string is greater than second
	138	*/
	139	static inline int
50c2f753	140	UniStrcmp(const wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	141	{
	142	while ((ucs1 == ucs2) && *ucs1) {
	143	ucs1++;
	144	ucs2++;
	145	}
	146	return (int) ucs1 - (int) ucs2;
	147	}
	148
	149	/*
	150	* UniStrcpy: Copy a string
	151	*/
	152	static inline wchar_t *
50c2f753	153	UniStrcpy(wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	154	{
	155	wchar_t anchor = ucs1; / save the start of result string */
	156
	157	while ((ucs1++ = ucs2++)) ;
	158	return anchor;
	159	}
	160
	161	/*
	162	* UniStrlen: Return the length of a string (in 16 bit Unicode chars not bytes)
	163	*/
	164	static inline size_t
50c2f753	165	UniStrlen(const wchar_t *ucs1)
1da177e4 LT	166	{
	167	int i = 0;
	168
	169	while (*ucs1++)
	170	i++;
	171	return i;
	172	}
	173
	174	/*
d38d8c74 SF	175	* UniStrnlen: Return the length (in 16 bit Unicode chars not bytes) of a
d38d8c74 SF	176	* string (length limited)
1da177e4 LT	177	*/
1da177e4 LT	178	static inline size_t
50c2f753	179	UniStrnlen(const wchar_t *ucs1, int maxlen)
1da177e4 LT	180	{
	181	int i = 0;
	182
	183	while (*ucs1++) {
	184	i++;
	185	if (i >= maxlen)
	186	break;
	187	}
	188	return i;
	189	}
	190
	191	/*
	192	* UniStrncat: Concatenate length limited string
	193	*/
	194	static inline wchar_t *
50c2f753	195	UniStrncat(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	196	{
	197	wchar_t anchor = ucs1; / save pointer to string 1 */
	198
	199	while (*ucs1++) ;
	200	ucs1--; /* point to null terminator of s1 */
	201	while (n-- && (ucs1 = ucs2)) { /* copy s2 after s1 */
	202	ucs1++;
	203	ucs2++;
	204	}
	205	ucs1 = 0; / Null terminate the result */
	206	return (anchor);
	207	}
	208
	209	/*
	210	* UniStrncmp: Compare length limited string
	211	*/
	212	static inline int
50c2f753	213	UniStrncmp(const wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	214	{
	215	if (!n)
	216	return 0; /* Null strings are equal */
	217	while ((ucs1 == ucs2) && *ucs1 && --n) {
	218	ucs1++;
	219	ucs2++;
	220	}
	221	return (int) ucs1 - (int) ucs2;
	222	}
	223
	224	/*
	225	* UniStrncmp_le: Compare length limited string - native to little-endian
	226	*/
	227	static inline int
50c2f753	228	UniStrncmp_le(const wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	229	{
	230	if (!n)
	231	return 0; /* Null strings are equal */
	232	while ((ucs1 == __le16_to_cpu(ucs2)) && *ucs1 && --n) {
	233	ucs1++;
	234	ucs2++;
	235	}
	236	return (int) ucs1 - (int) __le16_to_cpu(ucs2);
	237	}
	238
	239	/*
	240	* UniStrncpy: Copy length limited string with pad
	241	*/
	242	static inline wchar_t *
50c2f753	243	UniStrncpy(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	244	{
	245	wchar_t *anchor = ucs1;
	246
	247	while (n-- && ucs2) / Copy the strings */
	248	ucs1++ = ucs2++;
	249
	250	n++;
	251	while (n--) /* Pad with nulls */
	252	*ucs1++ = 0;
	253	return anchor;
	254	}
	255
	256	/*
	257	* UniStrncpy_le: Copy length limited string with pad to little-endian
	258	*/
	259	static inline wchar_t *
50c2f753	260	UniStrncpy_le(wchar_t ucs1, const wchar_t ucs2, size_t n)
1da177e4 LT	261	{
	262	wchar_t *anchor = ucs1;
	263
	264	while (n-- && ucs2) / Copy the strings */
	265	ucs1++ = __le16_to_cpu(ucs2++);
	266
	267	n++;
	268	while (n--) /* Pad with nulls */
	269	*ucs1++ = 0;
	270	return anchor;
	271	}
	272
	273	/*
	274	* UniStrstr: Find a string in a string
	275	*
	276	* Returns:
	277	* Address of first match found
	278	* NULL if no matching string is found
	279	*/
	280	static inline wchar_t *
50c2f753	281	UniStrstr(const wchar_t ucs1, const wchar_t ucs2)
1da177e4 LT	282	{
	283	const wchar_t *anchor1 = ucs1;
	284	const wchar_t *anchor2 = ucs2;
	285
	286	while (*ucs1) {
ad7a2926 SF	287	if (ucs1 == ucs2) {
ad7a2926 SF	288	/* Partial match found */
1da177e4 LT	289	ucs1++;
	290	ucs2++;
	291	} else {
	292	if (!ucs2) / Match found */
	293	return (wchar_t *) anchor1;
	294	ucs1 = ++anchor1; /* No match */
	295	ucs2 = anchor2;
	296	}
	297	}
	298
	299	if (!ucs2) / Both end together */
	300	return (wchar_t ) anchor1; / Match found */
	301	return NULL; /* No match */
	302	}
	303
	304	#ifndef UNIUPR_NOUPPER
	305	/*
	306	* UniToupper: Convert a unicode character to upper case
	307	*/
	308	static inline wchar_t
	309	UniToupper(register wchar_t uc)
	310	{
	311	register const struct UniCaseRange *rp;
	312
ad7a2926 SF	313	if (uc < sizeof(CifsUniUpperTable)) {
ad7a2926 SF	314	/* Latin characters */
1da177e4 LT	315	return uc + CifsUniUpperTable[uc]; /* Use base tables */
	316	} else {
	317	rp = CifsUniUpperRange; /* Use range tables */
	318	while (rp->start) {
	319	if (uc < rp->start) /* Before start of range */
	320	return uc; /* Uppercase = input */
	321	if (uc <= rp->end) /* In range */
	322	return uc + rp->table[uc - rp->start];
	323	rp++; /* Try next range */
	324	}
	325	}
	326	return uc; /* Past last range */
	327	}
	328
	329	/*
	330	* UniStrupr: Upper case a unicode string
	331	*/
fdf96a90 SF	332	static inline __le16 *
fdf96a90 SF	333	UniStrupr(register __le16 *upin)
1da177e4	334	{
fdf96a90	335	register __le16 *up;
1da177e4 LT	336
	337	up = upin;
	338	while (up) { / For all characters */
fdf96a90	339	up = cpu_to_le16(UniToupper(le16_to_cpu(up)));
1da177e4 LT	340	up++;
	341	}
	342	return upin; /* Return input pointer */
	343	}
	344	#endif /* UNIUPR_NOUPPER */
	345
	346	#ifndef UNIUPR_NOLOWER
	347	/*
	348	* UniTolower: Convert a unicode character to lower case
	349	*/
	350	static inline wchar_t
bf4f1211	351	UniTolower(register wchar_t uc)
1da177e4	352	{
bf4f1211	353	register const struct UniCaseRange *rp;
1da177e4	354
bf4f1211	355	if (uc < sizeof(CifsUniLowerTable)) {
ad7a2926	356	/* Latin characters */
bf4f1211	357	return uc + CifsUniLowerTable[uc]; /* Use base tables */
1da177e4	358	} else {
bf4f1211	359	rp = CifsUniLowerRange; /* Use range tables */
1da177e4 LT	360	while (rp->start) {
	361	if (uc < rp->start) /* Before start of range */
	362	return uc; /* Uppercase = input */
	363	if (uc <= rp->end) /* In range */
	364	return uc + rp->table[uc - rp->start];
	365	rp++; /* Try next range */
	366	}
	367	}
	368	return uc; /* Past last range */
	369	}
	370
	371	/*
	372	* UniStrlwr: Lower case a unicode string
	373	*/
	374	static inline wchar_t *
50c2f753	375	UniStrlwr(register wchar_t *upin)
1da177e4 LT	376	{
	377	register wchar_t *up;
	378
	379	up = upin;
	380	while (up) { / For all characters */
	381	up = UniTolower(up);
	382	up++;
	383	}
	384	return upin; /* Return input pointer */
	385	}
	386
	387	#endif
bf4f1211 ID	388
bf4f1211 ID	389	#endif /* _CIFS_UNICODE_H */