[linux.git] / fs / jfs / jfs_unicode.h

/*
 *   Copyright (C) International Business Machines Corp., 2000-2002
 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
 *
 *   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
 */
#ifndef _H_JFS_UNICODE
#define _H_JFS_UNICODE

#include <linux/slab.h>
#include <asm/byteorder.h>
#include "jfs_types.h"

typedef struct {
	wchar_t start;
	wchar_t end;
	signed char *table;
} UNICASERANGE;

extern signed char UniUpperTable[512];
extern UNICASERANGE UniUpperRange[];
extern int get_UCSname(struct component_name *, struct dentry *);
extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *);

#define free_UCSname(COMP) kfree((COMP)->name)

/*
 * 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;
}


/*
 * UniStrncpy:  Copy length limited string with pad
 */
static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2,
				  size_t n)
{
	__le16 *anchor = ucs1;

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

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

/*
 * UniStrncmp_le:  Compare length limited string - native to little-endian
 */
static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * 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_to_le:  Copy length limited string with pad to little-endian
 */
static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2,
				       size_t n)
{
	__le16 *anchor = ucs1;

	while (n-- && *ucs2)	/* Copy the strings */
		*ucs1++ = cpu_to_le16(*ucs2++);

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

/*
 * UniStrncpy_from_le:  Copy length limited string with pad from little-endian
 */
static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * 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;
}

/*
 * UniToupper:  Convert a unicode character to upper case
 */
static inline wchar_t UniToupper(wchar_t uc)
{
	UNICASERANGE *rp;

	if (uc < sizeof(UniUpperTable)) {	/* Latin characters */
		return uc + UniUpperTable[uc];	/* Use base tables */
	} else {
		rp = UniUpperRange;	/* 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 wchar_t *UniStrupr(wchar_t * upin)
{
	wchar_t *up;

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

#endif				/* !_H_JFS_UNICODE */
Commit	Line	Data
1da177e4	1	/*
63f83c9f DK	2	* Copyright (C) International Business Machines Corp., 2000-2002
63f83c9f DK	3	* Portions Copyright (C) Christoph Hellwig, 2001-2002
1da177e4 LT	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
63f83c9f	7	* the Free Software Foundation; either version 2 of the License, or
1da177e4	8	* (at your option) any later version.
63f83c9f	9	*
1da177e4 LT	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
	13	* the GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
63f83c9f	16	* along with this program; if not, write to the Free Software
1da177e4 LT	17	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18	*/
	19	#ifndef _H_JFS_UNICODE
	20	#define _H_JFS_UNICODE
	21
5a0e3ad6	22	#include <linux/slab.h>
1da177e4 LT	23	#include <asm/byteorder.h>
	24	#include "jfs_types.h"
	25
	26	typedef struct {
	27	wchar_t start;
	28	wchar_t end;
	29	signed char *table;
	30	} UNICASERANGE;
	31
	32	extern signed char UniUpperTable[512];
	33	extern UNICASERANGE UniUpperRange[];
	34	extern int get_UCSname(struct component_name , struct dentry );
	35	extern int jfs_strfromUCS_le(char , const __le16 , int, struct nls_table *);
	36
	37	#define free_UCSname(COMP) kfree((COMP)->name)
	38
	39	/*
	40	* UniStrcpy: Copy a string
	41	*/
	42	static inline wchar_t UniStrcpy(wchar_t ucs1, const wchar_t * ucs2)
	43	{
	44	wchar_t anchor = ucs1; / save the start of result string */
	45
	46	while ((ucs1++ = ucs2++));
	47	return anchor;
	48	}
	49
	50
	51
	52	/*
	53	* UniStrncpy: Copy length limited string with pad
	54	*/
	55	static inline __le16 UniStrncpy_le(__le16 ucs1, const __le16 * ucs2,
	56	size_t n)
	57	{
	58	__le16 *anchor = ucs1;
	59
	60	while (n-- && ucs2) / Copy the strings */
	61	ucs1++ = ucs2++;
	62
	63	n++;
	64	while (n--) /* Pad with nulls */
	65	*ucs1++ = 0;
	66	return anchor;
	67	}
	68
	69	/*
	70	* UniStrncmp_le: Compare length limited string - native to little-endian
	71	*/
	72	static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2,
	73	size_t n)
	74	{
	75	if (!n)
	76	return 0; /* Null strings are equal */
	77	while ((ucs1 == __le16_to_cpu(ucs2)) && *ucs1 && --n) {
	78	ucs1++;
	79	ucs2++;
	80	}
	81	return (int) ucs1 - (int) __le16_to_cpu(ucs2);
	82	}
	83
	84	/*
	85	* UniStrncpy_to_le: Copy length limited string with pad to little-endian
	86	*/
87	static inline __le16 UniStrncpy_to_le(__le16 ucs1, const wchar_t * ucs2,
88	size_t n)
89	{
90	__le16 *anchor = ucs1;
91
92	while (n-- && ucs2) / Copy the strings */
93	ucs1++ = cpu_to_le16(ucs2++);
94
95	n++;
96	while (n--) /* Pad with nulls */
97	*ucs1++ = 0;
98	return anchor;
99	}
100
101	/*
102	* UniStrncpy_from_le: Copy length limited string with pad from little-endian
103	*/
104	static inline wchar_t UniStrncpy_from_le(wchar_t ucs1, const __le16 * ucs2,
105	size_t n)
106	{
107	wchar_t *anchor = ucs1;
108
109	while (n-- && ucs2) / Copy the strings */
110	ucs1++ = __le16_to_cpu(ucs2++);
111
112	n++;
113	while (n--) /* Pad with nulls */
114	*ucs1++ = 0;
115	return anchor;
116	}
117
118	/*
119	* UniToupper: Convert a unicode character to upper case
120	*/
121	static inline wchar_t UniToupper(wchar_t uc)
122	{
123	UNICASERANGE *rp;
124
125	if (uc < sizeof(UniUpperTable)) { /* Latin characters */
126	return uc + UniUpperTable[uc]; /* Use base tables */
127	} else {
128	rp = UniUpperRange; /* Use range tables */
129	while (rp->start) {
130	if (uc < rp->start) /* Before start of range */
131	return uc; /* Uppercase = input */
132	if (uc <= rp->end) /* In range */
133	return uc + rp->table[uc - rp->start];
134	rp++; /* Try next range */
135	}
136	}
137	return uc; /* Past last range */
138	}
139
140
141	/*
142	* UniStrupr: Upper case a unicode string
143	*/
144	static inline wchar_t UniStrupr(wchar_t upin)
145	{
146	wchar_t *up;
147
148	up = upin;
149	while (up) { / For all characters */
150	up = UniToupper(up);
151	up++;
152	}
153	return upin; /* Return input pointer */
154	}
155
156	#endif /* !_H_JFS_UNICODE */