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1a59d1b8 | 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
1da177e4 | 2 | /* |
63f83c9f DK |
3 | * Copyright (C) International Business Machines Corp., 2000-2002 |
4 | * Portions Copyright (C) Christoph Hellwig, 2001-2002 | |
1da177e4 LT |
5 | */ |
6 | #ifndef _H_JFS_UNICODE | |
7 | #define _H_JFS_UNICODE | |
8 | ||
5a0e3ad6 | 9 | #include <linux/slab.h> |
1da177e4 | 10 | #include <asm/byteorder.h> |
f3a9b375 | 11 | #include "../nls/nls_ucs2_data.h" |
1da177e4 LT |
12 | #include "jfs_types.h" |
13 | ||
1da177e4 LT |
14 | extern int get_UCSname(struct component_name *, struct dentry *); |
15 | extern int jfs_strfromUCS_le(char *, const __le16 *, int, struct nls_table *); | |
16 | ||
17 | #define free_UCSname(COMP) kfree((COMP)->name) | |
18 | ||
19 | /* | |
20 | * UniStrcpy: Copy a string | |
21 | */ | |
22 | static inline wchar_t *UniStrcpy(wchar_t * ucs1, const wchar_t * ucs2) | |
23 | { | |
24 | wchar_t *anchor = ucs1; /* save the start of result string */ | |
25 | ||
26 | while ((*ucs1++ = *ucs2++)); | |
27 | return anchor; | |
28 | } | |
29 | ||
30 | ||
31 | ||
32 | /* | |
33 | * UniStrncpy: Copy length limited string with pad | |
34 | */ | |
35 | static inline __le16 *UniStrncpy_le(__le16 * ucs1, const __le16 * ucs2, | |
36 | size_t n) | |
37 | { | |
38 | __le16 *anchor = ucs1; | |
39 | ||
40 | while (n-- && *ucs2) /* Copy the strings */ | |
41 | *ucs1++ = *ucs2++; | |
42 | ||
43 | n++; | |
44 | while (n--) /* Pad with nulls */ | |
45 | *ucs1++ = 0; | |
46 | return anchor; | |
47 | } | |
48 | ||
49 | /* | |
50 | * UniStrncmp_le: Compare length limited string - native to little-endian | |
51 | */ | |
52 | static inline int UniStrncmp_le(const wchar_t * ucs1, const __le16 * ucs2, | |
53 | size_t n) | |
54 | { | |
55 | if (!n) | |
56 | return 0; /* Null strings are equal */ | |
57 | while ((*ucs1 == __le16_to_cpu(*ucs2)) && *ucs1 && --n) { | |
58 | ucs1++; | |
59 | ucs2++; | |
60 | } | |
61 | return (int) *ucs1 - (int) __le16_to_cpu(*ucs2); | |
62 | } | |
63 | ||
64 | /* | |
65 | * UniStrncpy_to_le: Copy length limited string with pad to little-endian | |
66 | */ | |
67 | static inline __le16 *UniStrncpy_to_le(__le16 * ucs1, const wchar_t * ucs2, | |
68 | size_t n) | |
69 | { | |
70 | __le16 *anchor = ucs1; | |
71 | ||
72 | while (n-- && *ucs2) /* Copy the strings */ | |
73 | *ucs1++ = cpu_to_le16(*ucs2++); | |
74 | ||
75 | n++; | |
76 | while (n--) /* Pad with nulls */ | |
77 | *ucs1++ = 0; | |
78 | return anchor; | |
79 | } | |
80 | ||
81 | /* | |
82 | * UniStrncpy_from_le: Copy length limited string with pad from little-endian | |
83 | */ | |
84 | static inline wchar_t *UniStrncpy_from_le(wchar_t * ucs1, const __le16 * ucs2, | |
85 | size_t n) | |
86 | { | |
87 | wchar_t *anchor = ucs1; | |
88 | ||
89 | while (n-- && *ucs2) /* Copy the strings */ | |
90 | *ucs1++ = __le16_to_cpu(*ucs2++); | |
91 | ||
92 | n++; | |
93 | while (n--) /* Pad with nulls */ | |
94 | *ucs1++ = 0; | |
95 | return anchor; | |
96 | } | |
97 | ||
98 | /* | |
99 | * UniToupper: Convert a unicode character to upper case | |
100 | */ | |
101 | static inline wchar_t UniToupper(wchar_t uc) | |
102 | { | |
f3a9b375 | 103 | const struct UniCaseRange *rp; |
1da177e4 | 104 | |
f3a9b375 DDAG |
105 | if (uc < sizeof(NlsUniUpperTable)) { /* Latin characters */ |
106 | return uc + NlsUniUpperTable[uc]; /* Use base tables */ | |
1da177e4 | 107 | } else { |
f3a9b375 | 108 | rp = NlsUniUpperRange; /* Use range tables */ |
1da177e4 LT |
109 | while (rp->start) { |
110 | if (uc < rp->start) /* Before start of range */ | |
111 | return uc; /* Uppercase = input */ | |
112 | if (uc <= rp->end) /* In range */ | |
113 | return uc + rp->table[uc - rp->start]; | |
114 | rp++; /* Try next range */ | |
115 | } | |
116 | } | |
117 | return uc; /* Past last range */ | |
118 | } | |
119 | ||
120 | ||
121 | /* | |
122 | * UniStrupr: Upper case a unicode string | |
123 | */ | |
124 | static inline wchar_t *UniStrupr(wchar_t * upin) | |
125 | { | |
126 | wchar_t *up; | |
127 | ||
128 | up = upin; | |
129 | while (*up) { /* For all characters */ | |
130 | *up = UniToupper(*up); | |
131 | up++; | |
132 | } | |
133 | return upin; /* Return input pointer */ | |
134 | } | |
135 | ||
136 | #endif /* !_H_JFS_UNICODE */ |