xref: /PHP-5.3/ext/mbstring/oniguruma/enc/euc_kr.c (revision e95f9a0e)
1 /**********************************************************************
2   euc_kr.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_EUCKR[] = {
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
euckr_mbc_enc_len(const UChar * p)52 euckr_mbc_enc_len(const UChar* p)
53 {
54   return EncLen_EUCKR[*p];
55 }
56 
57 static OnigCodePoint
euckr_mbc_to_code(const UChar * p,const UChar * end)58 euckr_mbc_to_code(const UChar* p, const UChar* end)
59 {
60   return onigenc_mbn_mbc_to_code(ONIG_ENCODING_EUC_KR, p, end);
61 }
62 
63 static int
euckr_code_to_mbc(OnigCodePoint code,UChar * buf)64 euckr_code_to_mbc(OnigCodePoint code, UChar *buf)
65 {
66   return onigenc_mb2_code_to_mbc(ONIG_ENCODING_EUC_KR, code, buf);
67 }
68 
69 static int
euckr_mbc_to_normalize(OnigAmbigType flag,const UChar ** pp,const UChar * end,UChar * lower)70 euckr_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
71                        UChar* lower)
72 {
73   return onigenc_mbn_mbc_to_normalize(ONIG_ENCODING_EUC_KR, flag,
74                                       pp, end, lower);
75 }
76 
77 static int
euckr_is_mbc_ambiguous(OnigAmbigType flag,const UChar ** pp,const UChar * end)78 euckr_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
79 {
80   return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_EUC_KR, flag, pp, end);
81 }
82 
83 static int
euckr_is_code_ctype(OnigCodePoint code,unsigned int ctype)84 euckr_is_code_ctype(OnigCodePoint code, unsigned int ctype)
85 {
86   return onigenc_mb2_is_code_ctype(ONIG_ENCODING_EUC_KR, code, ctype);
87 }
88 
89 #define euckr_islead(c)    ((c) < 0xa1 || (c) == 0xff)
90 
91 static UChar*
euckr_left_adjust_char_head(const UChar * start,const UChar * s)92 euckr_left_adjust_char_head(const UChar* start, const UChar* s)
93 {
94   /* Assumed in this encoding,
95      mb-trail bytes don't mix with single bytes.
96   */
97   const UChar *p;
98   int len;
99 
100   if (s <= start) return (UChar* )s;
101   p = s;
102 
103   while (!euckr_islead(*p) && p > start) p--;
104   len = enc_len(ONIG_ENCODING_EUC_KR, p);
105   if (p + len > s) return (UChar* )p;
106   p += len;
107   return (UChar* )(p + ((s - p) & ~1));
108 }
109 
110 static int
euckr_is_allowed_reverse_match(const UChar * s,const UChar * end)111 euckr_is_allowed_reverse_match(const UChar* s, const UChar* end)
112 {
113   const UChar c = *s;
114   if (c <= 0x7e) return TRUE;
115   else           return FALSE;
116 }
117 
118 OnigEncodingType OnigEncodingEUC_KR = {
119   euckr_mbc_enc_len,
120   "EUC-KR",   /* name */
121   2,          /* max enc length */
122   1,          /* min enc length */
123   ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
124   {
125       (OnigCodePoint )'\\'                       /* esc */
126     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.'  */
127     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*'  */
128     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
129     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
130     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
131   },
132   onigenc_is_mbc_newline_0x0a,
133   euckr_mbc_to_code,
134   onigenc_mb2_code_to_mbclen,
135   euckr_code_to_mbc,
136   euckr_mbc_to_normalize,
137   euckr_is_mbc_ambiguous,
138   onigenc_ascii_get_all_pair_ambig_codes,
139   onigenc_nothing_get_all_comp_ambig_codes,
140   euckr_is_code_ctype,
141   onigenc_not_support_get_ctype_code_range,
142   euckr_left_adjust_char_head,
143   euckr_is_allowed_reverse_match
144 };
145 
146 /* Same with OnigEncodingEUC_KR except the name */
147 OnigEncodingType OnigEncodingEUC_CN = {
148   euckr_mbc_enc_len,
149   "EUC-CN",   /* name */
150   2,          /* max enc length */
151   1,          /* min enc length */
152   ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
153   {
154       (OnigCodePoint )'\\'                       /* esc */
155     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.'  */
156     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*'  */
157     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
158     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
159     , (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
160   },
161   onigenc_is_mbc_newline_0x0a,
162   euckr_mbc_to_code,
163   onigenc_mb2_code_to_mbclen,
164   euckr_code_to_mbc,
165   euckr_mbc_to_normalize,
166   euckr_is_mbc_ambiguous,
167   onigenc_ascii_get_all_pair_ambig_codes,
168   onigenc_nothing_get_all_comp_ambig_codes,
169   euckr_is_code_ctype,
170   onigenc_not_support_get_ctype_code_range,
171   euckr_left_adjust_char_head,
172   euckr_is_allowed_reverse_match
173 };
174