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 <asm/byteorder.h>
23#include "jfs_types.h"
24
25typedef struct {
26	wchar_t start;
27	wchar_t end;
28	signed char *table;
29} UNICASERANGE;
30
31extern signed char UniUpperTable[512];
32extern UNICASERANGE UniUpperRange[];
33extern int get_UCSname(struct component_name *, struct dentry *);
34extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *);
35
36#define free_UCSname(COMP) kfree((COMP)->name)
37
38/*
39 * UniStrcpy:  Copy a string
40 */
41static inline wchar_t *UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2)
42{
43	wchar_t *anchor = ucs1;	/* save the start of result string */
44
45	while ((*ucs1++ = *ucs2++));
46	return anchor;
47}
48
49
50
51/*
52 * UniStrncpy:  Copy length limited string with pad
53 */
54static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2,
55				  size_t n)
56{
57	__le16 *anchor = ucs1;
58
59	while (n-- && *ucs2)	/* Copy the strings */
60		*ucs1++ = *ucs2++;
61
62	n++;
63	while (n--)		/* Pad with nulls */
64		*ucs1++ = 0;
65	return anchor;
66}
67
68/*
69 * UniStrncmp_le:  Compare length limited string - native to little-endian
70 */
71static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2,
72				size_t n)
73{
74	if (!n)
75		return 0;	/* Null strings are equal */
76	while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) {
77		ucs1++;
78		ucs2++;
79	}
80	return (int) *ucs1 - (int) __le16_to_cpu(*ucs2);
81}
82
83/*
84 * UniStrncpy_to_le:  Copy length limited string with pad to little-endian
85 */
86static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2,
87				       size_t n)
88{
89	__le16 *anchor = ucs1;
90
91	while (n-- && *ucs2)	/* Copy the strings */
92		*ucs1++ = cpu_to_le16(*ucs2++);
93
94	n++;
95	while (n--)		/* Pad with nulls */
96		*ucs1++ = 0;
97	return anchor;
98}
99
100/*
101 * UniStrncpy_from_le:  Copy length limited string with pad from little-endian
102 */
103static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * ucs2,
104					  size_t n)
105{
106	wchar_t *anchor = ucs1;
107
108	while (n-- && *ucs2)	/* Copy the strings */
109		*ucs1++ = __le16_to_cpu(*ucs2++);
110
111	n++;
112	while (n--)		/* Pad with nulls */
113		*ucs1++ = 0;
114	return anchor;
115}
116
117/*
118 * UniToupper:  Convert a unicode character to upper case
119 */
120static inline wchar_t UniToupper(wchar_t uc)
121{
122	UNICASERANGE *rp;
123
124	if (uc < sizeof(UniUpperTable)) {	/* Latin characters */
125		return uc + UniUpperTable[uc];	/* Use base tables */
126	} else {
127		rp = UniUpperRange;	/* Use range tables */
128		while (rp->start) {
129			if (uc < rp->start)	/* Before start of range */
130				return uc;	/* Uppercase = input */
131			if (uc <= rp->end)	/* In range */
132				return uc + rp->table[uc - rp->start];
133			rp++;	/* Try next range */
134		}
135	}
136	return uc;		/* Past last range */
137}
138
139
140/*
141 * UniStrupr:  Upper case a unicode string
142 */
143static inline wchar_t *UniStrupr(wchar_t * upin)
144{
145	wchar_t *up;
146
147	up = upin;
148	while (*up) {		/* For all characters */
149		*up = UniToupper(*up);
150		up++;
151	}
152	return upin;		/* Return input pointer */
153}
154
155#endif				/* !_H_JFS_UNICODE */
156