1 /**********************************************************************
2 euc_jp.c - Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5 * Copyright (c) 2002-2020 K.Kosako
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 int
is_valid_mbc_string(const UChar * p,const UChar * end)60 is_valid_mbc_string(const UChar* p, const UChar* end)
61 {
62 while (p < end) {
63 if (*p < 0x80) {
64 p++;
65 }
66 else if (*p > 0xa0) {
67 if (*p == 0xff) return FALSE;
68 p++;
69 if (p >= end) return FALSE;
70 if (*p < 0xa1 || *p == 0xff) return FALSE;
71 p++;
72 }
73 else if (*p == 0x8e) {
74 p++;
75 if (p >= end) return FALSE;
76 if (*p < 0xa1 || *p > 0xdf) return FALSE;
77 p++;
78 }
79 else if (*p == 0x8f) {
80 p++;
81 if (p >= end) return FALSE;
82 if (*p < 0xa1 || *p == 0xff) return FALSE;
83 p++;
84 if (p >= end) return FALSE;
85 if (*p < 0xa1 || *p == 0xff) return FALSE;
86 p++;
87 }
88 else
89 return FALSE;
90 }
91
92 return TRUE;
93 }
94
95 static OnigCodePoint
mbc_to_code(const UChar * p,const UChar * end)96 mbc_to_code(const UChar* p, const UChar* end)
97 {
98 int c, i, len;
99 OnigCodePoint n;
100
101 len = enclen(ONIG_ENCODING_EUC_JP, p);
102 n = (OnigCodePoint )*p++;
103 if (len == 1) return n;
104
105 for (i = 1; i < len; i++) {
106 if (p >= end) break;
107 c = *p++;
108 n <<= 8; n += c;
109 }
110 return n;
111 }
112
113 static int
code_to_mbclen(OnigCodePoint code)114 code_to_mbclen(OnigCodePoint code)
115 {
116 if (ONIGENC_IS_CODE_ASCII(code)) return 1;
117 else if ((code & 0xff0000) != 0) {
118 if (EncLen_EUCJP[(int )(code >> 16) & 0xff] == 3)
119 return 3;
120 }
121 else if ((code & 0xff00) != 0) {
122 if (EncLen_EUCJP[(int )(code >> 8) & 0xff] == 2)
123 return 2;
124 }
125 else if (code < 256) {
126 if (EncLen_EUCJP[(int )(code & 0xff)] == 1)
127 return 1;
128 }
129
130 return ONIGERR_INVALID_CODE_POINT_VALUE;
131 }
132
133 static int
code_to_mbc(OnigCodePoint code,UChar * buf)134 code_to_mbc(OnigCodePoint code, UChar *buf)
135 {
136 UChar *p = buf;
137
138 if ((code & 0xff0000) != 0) {
139 *p++ = (UChar )(((code >> 16) & 0xff));
140 *p++ = (UChar )(((code >> 8) & 0xff));
141 }
142 else if ((code & 0xff00) != 0)
143 *p++ = (UChar )(((code >> 8) & 0xff));
144
145 *p++ = (UChar )(code & 0xff);
146
147 #if 1
148 if (enclen(ONIG_ENCODING_EUC_JP, buf) != (p - buf))
149 return ONIGERR_INVALID_CODE_POINT_VALUE;
150 #endif
151 return (int )(p - buf);
152 }
153
154 static int
mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,const UChar ** pp,const UChar * end ARG_UNUSED,UChar * lower)155 mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,
156 const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower)
157 {
158 int len;
159 const UChar* p = *pp;
160
161 if (ONIGENC_IS_MBC_ASCII(p)) {
162 *lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
163 (*pp)++;
164 return 1;
165 }
166 else {
167 int i;
168
169 len = enclen(ONIG_ENCODING_EUC_JP, p);
170 for (i = 0; i < len; i++) {
171 *lower++ = *p++;
172 }
173 (*pp) += len;
174 return len; /* return byte length of converted char to lower */
175 }
176 }
177
178 static UChar*
left_adjust_char_head(const UChar * start,const UChar * s)179 left_adjust_char_head(const UChar* start, const UChar* s)
180 {
181 /* In this encoding
182 mb-trail bytes doesn't mix with single bytes.
183 */
184 const UChar *p;
185 int len;
186
187 if (s <= start) return (UChar* )s;
188 p = s;
189
190 while (!eucjp_islead(*p) && p > start) p--;
191 len = enclen(ONIG_ENCODING_EUC_JP, p);
192 if (p + len > s) return (UChar* )p;
193 p += len;
194 return (UChar* )(p + ((s - p) & ~1));
195 }
196
197 static int
is_allowed_reverse_match(const UChar * s,const UChar * end ARG_UNUSED)198 is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
199 {
200 const UChar c = *s;
201 if (c <= 0x7e || c == 0x8e || c == 0x8f)
202 return TRUE;
203 else
204 return FALSE;
205 }
206
207
208 static const OnigCodePoint CR_Hiragana[] = {
209 1,
210 0xa4a1, 0xa4f3
211 }; /* CR_Hiragana */
212
213 static const OnigCodePoint CR_Katakana[] = {
214 3,
215 0xa5a1, 0xa5f6,
216 0xaaa6, 0xaaaf,
217 0xaab1, 0xaadd
218 }; /* CR_Katakana */
219
220 static const OnigCodePoint* PropertyList[] = {
221 CR_Hiragana,
222 CR_Katakana
223 };
224
225 static int
property_name_to_ctype(OnigEncoding enc,UChar * p,UChar * end)226 property_name_to_ctype(OnigEncoding enc, UChar* p, UChar* end)
227 {
228 struct PropertyNameCtype* pc;
229 int len = (int )(end - p);
230 char q[32];
231
232 if (len < sizeof(q) - 1) {
233 xmemcpy(q, p, (size_t )len);
234 q[len] = '\0';
235 pc = onigenc_euc_jp_lookup_property_name(q, len);
236 if (pc != 0)
237 return pc->ctype;
238 }
239
240 return ONIGERR_INVALID_CHAR_PROPERTY_NAME;
241 }
242
243 static int
is_code_ctype(OnigCodePoint code,unsigned int ctype)244 is_code_ctype(OnigCodePoint code, unsigned int ctype)
245 {
246 if (ctype <= ONIGENC_MAX_STD_CTYPE) {
247 if (code < 128)
248 return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
249 else {
250 if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
251 return (code_to_mbclen(code) > 1 ? TRUE : FALSE);
252 }
253 }
254 }
255 else {
256 ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
257 if (ctype >= (unsigned int )(sizeof(PropertyList)/sizeof(PropertyList[0])))
258 return ONIGERR_TYPE_BUG;
259
260 return onig_is_in_code_range((UChar* )PropertyList[ctype], code);
261 }
262
263 return FALSE;
264 }
265
266 static int
get_ctype_code_range(OnigCtype ctype,OnigCodePoint * sb_out,const OnigCodePoint * ranges[])267 get_ctype_code_range(OnigCtype ctype, OnigCodePoint* sb_out,
268 const OnigCodePoint* ranges[])
269 {
270 if (ctype <= ONIGENC_MAX_STD_CTYPE) {
271 return ONIG_NO_SUPPORT_CONFIG;
272 }
273 else {
274 *sb_out = 0x80;
275
276 ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
277 if (ctype >= (OnigCtype )sizeof(PropertyList)/sizeof(PropertyList[0]))
278 return ONIGERR_TYPE_BUG;
279
280 *ranges = PropertyList[ctype];
281 return 0;
282 }
283 }
284
285
286 OnigEncodingType OnigEncodingEUC_JP = {
287 mbc_enc_len,
288 "EUC-JP", /* name */
289 3, /* max enc length */
290 1, /* min enc length */
291 onigenc_is_mbc_newline_0x0a,
292 mbc_to_code,
293 code_to_mbclen,
294 code_to_mbc,
295 mbc_case_fold,
296 onigenc_ascii_apply_all_case_fold,
297 onigenc_ascii_get_case_fold_codes_by_str,
298 property_name_to_ctype,
299 is_code_ctype,
300 get_ctype_code_range,
301 left_adjust_char_head,
302 is_allowed_reverse_match,
303 NULL, /* init */
304 NULL, /* is_initialized */
305 is_valid_mbc_string,
306 ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1_OR_0,
307 0, 0
308 };
309