Root/fs/jfs/jfs_unicode.h

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

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