xref: /PHP-5.6/ext/mbstring/oniguruma/enc/euc_jp.c (revision fe92d64a)
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