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
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 */
UniStrcpy(wchar_t * ucs1,const wchar_t * ucs2)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 */
UniStrncpy_le(__le16 * ucs1,const __le16 * ucs2,size_t n)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 */
UniStrncmp_le(const wchar_t * ucs1,const __le16 * ucs2,size_t n)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 */
UniStrncpy_to_le(__le16 * ucs1,const wchar_t * ucs2,size_t n)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 */
UniStrncpy_from_le(wchar_t * ucs1,const __le16 * ucs2,size_t n)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 */
UniToupper(wchar_t uc)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 */
UniStrupr(wchar_t * upin)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 */
157