Annotation of embedaddon/php/ext/mbstring/oniguruma/enc/big5.c, revision 1.1.1.1
1.1 misho 1: /**********************************************************************
2: big5.c - Oniguruma (regular expression library)
3: **********************************************************************/
4: /*-
5: * Copyright (c) 2002-2005 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27: * SUCH DAMAGE.
28: */
29:
30: #include "regenc.h"
31:
32: static const int EncLen_BIG5[] = {
33: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
34: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
35: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
36: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
37: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
38: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
39: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
40: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
41: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
42: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
43: 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
44: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
45: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
46: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
47: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
48: 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
49: };
50:
51: static int
52: big5_mbc_enc_len(const UChar* p)
53: {
54: return EncLen_BIG5[*p];
55: }
56:
57: static OnigCodePoint
58: big5_mbc_to_code(const UChar* p, const UChar* end)
59: {
60: return onigenc_mbn_mbc_to_code(ONIG_ENCODING_BIG5, p, end);
61: }
62:
63: static int
64: big5_code_to_mbc(OnigCodePoint code, UChar *buf)
65: {
66: return onigenc_mb2_code_to_mbc(ONIG_ENCODING_BIG5, code, buf);
67: }
68:
69: static int
70: big5_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
71: UChar* lower)
72: {
73: return onigenc_mbn_mbc_to_normalize(ONIG_ENCODING_BIG5, flag,
74: pp, end, lower);
75: }
76:
77: static int
78: big5_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
79: {
80: return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_BIG5, flag, pp, end);
81: }
82:
83: static int
84: big5_is_code_ctype(OnigCodePoint code, unsigned int ctype)
85: {
86: return onigenc_mb2_is_code_ctype(ONIG_ENCODING_BIG5, code, ctype);
87: }
88:
89: static const char BIG5_CAN_BE_TRAIL_TABLE[256] = {
90: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
91: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
92: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
93: 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
94: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
95: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
96: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
97: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
98: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
99: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
100: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
101: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
102: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
103: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
104: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
105: 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
106: };
107:
108: #define BIG5_ISMB_FIRST(byte) (EncLen_BIG5[byte] > 1)
109: #define BIG5_ISMB_TRAIL(byte) BIG5_CAN_BE_TRAIL_TABLE[(byte)]
110:
111: static UChar*
112: big5_left_adjust_char_head(const UChar* start, const UChar* s)
113: {
114: const UChar *p;
115: int len;
116:
117: if (s <= start) return (UChar* )s;
118: p = s;
119:
120: if (BIG5_ISMB_TRAIL(*p)) {
121: while (p > start) {
122: if (! BIG5_ISMB_FIRST(*--p)) {
123: p++;
124: break;
125: }
126: }
127: }
128: len = enc_len(ONIG_ENCODING_BIG5, p);
129: if (p + len > s) return (UChar* )p;
130: p += len;
131: return (UChar* )(p + ((s - p) & ~1));
132: }
133:
134: static int
135: big5_is_allowed_reverse_match(const UChar* s, const UChar* end)
136: {
137: const UChar c = *s;
138:
139: return (BIG5_ISMB_TRAIL(c) ? FALSE : TRUE);
140: }
141:
142: OnigEncodingType OnigEncodingBIG5 = {
143: big5_mbc_enc_len,
144: "Big5", /* name */
145: 2, /* max enc length */
146: 1, /* min enc length */
147: ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
148: {
149: (OnigCodePoint )'\\' /* esc */
150: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
151: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
152: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
153: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
154: , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
155: },
156: onigenc_is_mbc_newline_0x0a,
157: big5_mbc_to_code,
158: onigenc_mb2_code_to_mbclen,
159: big5_code_to_mbc,
160: big5_mbc_to_normalize,
161: big5_is_mbc_ambiguous,
162: onigenc_ascii_get_all_pair_ambig_codes,
163: onigenc_nothing_get_all_comp_ambig_codes,
164: big5_is_code_ctype,
165: onigenc_not_support_get_ctype_code_range,
166: big5_left_adjust_char_head,
167: big5_is_allowed_reverse_match
168: };
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