1 /**********************************************************************
2 euc_kr.c - Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5 * Copyright (c) 2002-2018 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 int
is_valid_mbc_string(const UChar * p,const UChar * end)58 is_valid_mbc_string(const UChar* p, const UChar* end)
59 {
60 while (p < end) {
61 if (*p < 0x80) {
62 p++;
63 }
64 else if (*p < 0xa1) {
65 return FALSE;
66 }
67 else if (*p < 0xff) {
68 p++;
69 if (p >= end) return FALSE;
70 if (*p < 0xa1 || *p == 0xff)
71 return FALSE;
72 p++;
73 }
74 else
75 return FALSE;
76 }
77
78 return TRUE;
79 }
80
81 static OnigCodePoint
euckr_mbc_to_code(const UChar * p,const UChar * end)82 euckr_mbc_to_code(const UChar* p, const UChar* end)
83 {
84 return onigenc_mbn_mbc_to_code(ONIG_ENCODING_EUC_KR, p, end);
85 }
86
87 static int
euckr_code_to_mbc(OnigCodePoint code,UChar * buf)88 euckr_code_to_mbc(OnigCodePoint code, UChar *buf)
89 {
90 return onigenc_mb2_code_to_mbc(ONIG_ENCODING_EUC_KR, code, buf);
91 }
92
93 static int
euckr_mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end,UChar * lower)94 euckr_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
95 UChar* lower)
96 {
97 return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_EUC_KR, flag,
98 pp, end, lower);
99 }
100
101 #if 0
102 static int
103 euckr_is_mbc_ambiguous(OnigCaseFoldType flag,
104 const UChar** pp, const UChar* end)
105 {
106 return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_EUC_KR, flag, pp, end);
107 }
108 #endif
109
110 static int
euckr_is_code_ctype(OnigCodePoint code,unsigned int ctype)111 euckr_is_code_ctype(OnigCodePoint code, unsigned int ctype)
112 {
113 return onigenc_mb2_is_code_ctype(ONIG_ENCODING_EUC_KR, code, ctype);
114 }
115
116 #define euckr_islead(c) ((c) < 0xa1 || (c) == 0xff)
117
118 static UChar*
euckr_left_adjust_char_head(const UChar * start,const UChar * s)119 euckr_left_adjust_char_head(const UChar* start, const UChar* s)
120 {
121 /* Assumed in this encoding,
122 mb-trail bytes don't mix with single bytes.
123 */
124 const UChar *p;
125 int len;
126
127 if (s <= start) return (UChar* )s;
128 p = s;
129
130 while (!euckr_islead(*p) && p > start) p--;
131 len = enclen(ONIG_ENCODING_EUC_KR, p);
132 if (p + len > s) return (UChar* )p;
133 p += len;
134 return (UChar* )(p + ((s - p) & ~1));
135 }
136
137 static int
euckr_is_allowed_reverse_match(const UChar * s,const UChar * end ARG_UNUSED)138 euckr_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
139 {
140 const UChar c = *s;
141 if (c <= 0x7e) return TRUE;
142 else return FALSE;
143 }
144
145 OnigEncodingType OnigEncodingEUC_KR = {
146 euckr_mbc_enc_len,
147 "EUC-KR", /* name */
148 2, /* max enc length */
149 1, /* min enc length */
150 onigenc_is_mbc_newline_0x0a,
151 euckr_mbc_to_code,
152 onigenc_mb2_code_to_mbclen,
153 euckr_code_to_mbc,
154 euckr_mbc_case_fold,
155 onigenc_ascii_apply_all_case_fold,
156 onigenc_ascii_get_case_fold_codes_by_str,
157 onigenc_minimum_property_name_to_ctype,
158 euckr_is_code_ctype,
159 onigenc_not_support_get_ctype_code_range,
160 euckr_left_adjust_char_head,
161 euckr_is_allowed_reverse_match,
162 NULL, /* init */
163 NULL, /* is_initialized */
164 is_valid_mbc_string,
165 ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1_OR_0,
166 0, 0
167 };
168
169 /* Same with OnigEncodingEUC_KR except the name */
170 OnigEncodingType OnigEncodingEUC_CN = {
171 euckr_mbc_enc_len,
172 "EUC-CN", /* name */
173 2, /* max enc length */
174 1, /* min enc length */
175 onigenc_is_mbc_newline_0x0a,
176 euckr_mbc_to_code,
177 onigenc_mb2_code_to_mbclen,
178 euckr_code_to_mbc,
179 euckr_mbc_case_fold,
180 onigenc_ascii_apply_all_case_fold,
181 onigenc_ascii_get_case_fold_codes_by_str,
182 onigenc_minimum_property_name_to_ctype,
183 euckr_is_code_ctype,
184 onigenc_not_support_get_ctype_code_range,
185 euckr_left_adjust_char_head,
186 euckr_is_allowed_reverse_match,
187 NULL, /* init */
188 NULL, /* is_initialized */
189 is_valid_mbc_string,
190 ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1_OR_0,
191 0, 0
192 };
193