1/*
2 *   Copyright (C) International Business Machines Corp., 2000-2002
3 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
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
7 *   the Free Software Foundation; either version 2 of the License, or
8 *   (at your option) any later version.
9 *
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
16 *   along with this program;  if not, write to the Free Software
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
22#include <linux/slab.h>
23#include <asm/byteorder.h>
24#include "jfs_types.h"
25
26typedef struct {
27	wchar_t start;
28	wchar_t end;
29	signed char *table;
30} UNICASERANGE;
31
32extern signed char UniUpperTable[512];
33extern UNICASERANGE UniUpperRange[];
34extern int get_UCSname(struct component_name *, struct dentry *);
35extern 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 */
42static 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 */
55static 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 */
72static 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 */
87static 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 */
104static 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 */
121static 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 */
144static 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 */
157