1 /**********************************************************************
2 euc_jp.c - Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5 * Copyright (c) 2002-2008 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 "regint.h"
31
32 #define eucjp_islead(c) ((UChar )((c) - 0xa1) > 0xfe - 0xa1)
33
34 static const int EncLen_EUCJP[] = {
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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3,
44 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
45 1, 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, 2,
49 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
50 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
51 };
52
53 static int
mbc_enc_len(const UChar * p)54 mbc_enc_len(const UChar* p)
55 {
56 return EncLen_EUCJP[*p];
57 }
58
59 static OnigCodePoint
mbc_to_code(const UChar * p,const UChar * end)60 mbc_to_code(const UChar* p, const UChar* end)
61 {
62 int c, i, len;
63 OnigCodePoint n;
64
65 len = enclen(ONIG_ENCODING_EUC_JP, p);
66 n = (OnigCodePoint )*p++;
67 if (len == 1) return n;
68
69 for (i = 1; i < len; i++) {
70 if (p >= end) break;
71 c = *p++;
72 n <<= 8; n += c;
73 }
74 return n;
75 }
76
77 static int
code_to_mbclen(OnigCodePoint code)78 code_to_mbclen(OnigCodePoint code)
79 {
80 if (ONIGENC_IS_CODE_ASCII(code)) return 1;
81 else if ((code & 0xff0000) != 0) return 3;
82 else if ((code & 0xff00) != 0) return 2;
83 else
84 return ONIGERR_INVALID_CODE_POINT_VALUE;
85 }
86
87 #if 0
88 static int
89 code_to_mbc_first(OnigCodePoint code)
90 {
91 int first;
92
93 if ((code & 0xff0000) != 0) {
94 first = (code >> 16) & 0xff;
95 }
96 else if ((code & 0xff00) != 0) {
97 first = (code >> 8) & 0xff;
98 }
99 else {
100 return (int )code;
101 }
102 return first;
103 }
104 #endif
105
106 static int
code_to_mbc(OnigCodePoint code,UChar * buf)107 code_to_mbc(OnigCodePoint code, UChar *buf)
108 {
109 UChar *p = buf;
110
111 if ((code & 0xff0000) != 0) *p++ = (UChar )(((code >> 16) & 0xff));
112 if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
113 *p++ = (UChar )(code & 0xff);
114
115 #if 1
116 if (enclen(ONIG_ENCODING_EUC_JP, buf) != (p - buf))
117 return ONIGERR_INVALID_CODE_POINT_VALUE;
118 #endif
119 return p - buf;
120 }
121
122 static int
mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,const UChar ** pp,const UChar * end ARG_UNUSED,UChar * lower)123 mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,
124 const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower)
125 {
126 int len;
127 const UChar* p = *pp;
128
129 if (ONIGENC_IS_MBC_ASCII(p)) {
130 *lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
131 (*pp)++;
132 return 1;
133 }
134 else {
135 int i;
136
137 len = enclen(ONIG_ENCODING_EUC_JP, p);
138 for (i = 0; i < len; i++) {
139 *lower++ = *p++;
140 }
141 (*pp) += len;
142 return len; /* return byte length of converted char to lower */
143 }
144 }
145
146 static UChar*
left_adjust_char_head(const UChar * start,const UChar * s)147 left_adjust_char_head(const UChar* start, const UChar* s)
148 {
149 /* In this encoding
150 mb-trail bytes doesn't mix with single bytes.
151 */
152 const UChar *p;
153 int len;
154
155 if (s <= start) return (UChar* )s;
156 p = s;
157
158 while (!eucjp_islead(*p) && p > start) p--;
159 len = enclen(ONIG_ENCODING_EUC_JP, p);
160 if (p + len > s) return (UChar* )p;
161 p += len;
162 return (UChar* )(p + ((s - p) & ~1));
163 }
164
165 static int
is_allowed_reverse_match(const UChar * s,const UChar * end ARG_UNUSED)166 is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
167 {
168 const UChar c = *s;
169 if (c <= 0x7e || c == 0x8e || c == 0x8f)
170 return TRUE;
171 else
172 return FALSE;
173 }
174
175
176 static int PropertyInited = 0;
177 static const OnigCodePoint** PropertyList;
178 static int PropertyListNum;
179 static int PropertyListSize;
180 static hash_table_type* PropertyNameTable;
181
182 static const OnigCodePoint CR_Hiragana[] = {
183 1,
184 0xa4a1, 0xa4f3
185 }; /* CR_Hiragana */
186
187 static const OnigCodePoint CR_Katakana[] = {
188 3,
189 0xa5a1, 0xa5f6,
190 0xaaa6, 0xaaaf,
191 0xaab1, 0xaadd
192 }; /* CR_Katakana */
193
194 static int
init_property_list(void)195 init_property_list(void)
196 {
197 int r;
198
199 PROPERTY_LIST_ADD_PROP("Hiragana", CR_Hiragana);
200 PROPERTY_LIST_ADD_PROP("Katakana", CR_Katakana);
201 PropertyInited = 1;
202
203 end:
204 return r;
205 }
206
207 static int
property_name_to_ctype(OnigEncoding enc,UChar * p,UChar * end)208 property_name_to_ctype(OnigEncoding enc, UChar* p, UChar* end)
209 {
210 hash_data_type ctype;
211
212 PROPERTY_LIST_INIT_CHECK;
213
214 if (onig_st_lookup_strend(PropertyNameTable, p, end, &ctype) == 0) {
215 return onigenc_minimum_property_name_to_ctype(enc, p, end);
216 }
217
218 return (int )ctype;
219 }
220
221 static int
is_code_ctype(OnigCodePoint code,unsigned int ctype)222 is_code_ctype(OnigCodePoint code, unsigned int ctype)
223 {
224 if (ctype <= ONIGENC_MAX_STD_CTYPE) {
225 if (code < 128)
226 return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
227 else {
228 if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
229 return (code_to_mbclen(code) > 1 ? TRUE : FALSE);
230 }
231 }
232 }
233 else {
234 PROPERTY_LIST_INIT_CHECK;
235
236 ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
237 if (ctype >= (unsigned int )PropertyListNum)
238 return ONIGERR_TYPE_BUG;
239
240 return onig_is_in_code_range((UChar* )PropertyList[ctype], code);
241 }
242
243 return FALSE;
244 }
245
246 static int
get_ctype_code_range(OnigCtype ctype,OnigCodePoint * sb_out,const OnigCodePoint * ranges[])247 get_ctype_code_range(OnigCtype ctype, OnigCodePoint* sb_out,
248 const OnigCodePoint* ranges[])
249 {
250 if (ctype <= ONIGENC_MAX_STD_CTYPE) {
251 return ONIG_NO_SUPPORT_CONFIG;
252 }
253 else {
254 *sb_out = 0x80;
255
256 PROPERTY_LIST_INIT_CHECK;
257
258 ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
259 if (ctype >= (OnigCtype )PropertyListNum)
260 return ONIGERR_TYPE_BUG;
261
262 *ranges = PropertyList[ctype];
263 return 0;
264 }
265 }
266
267
268 OnigEncodingType OnigEncodingEUC_JP = {
269 mbc_enc_len,
270 "EUC-JP", /* name */
271 3, /* max enc length */
272 1, /* min enc length */
273 onigenc_is_mbc_newline_0x0a,
274 mbc_to_code,
275 code_to_mbclen,
276 code_to_mbc,
277 mbc_case_fold,
278 onigenc_ascii_apply_all_case_fold,
279 onigenc_ascii_get_case_fold_codes_by_str,
280 property_name_to_ctype,
281 is_code_ctype,
282 get_ctype_code_range,
283 left_adjust_char_head,
284 is_allowed_reverse_match
285 };
286
