xref: /PHP-7.2/ext/mbstring/oniguruma/src/iso8859_1.c (revision 0ae2f95b)
1 /**********************************************************************
2   iso8859_1.c -  Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5  * Copyright (c) 2002-2016  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 #define ENC_IS_ISO_8859_1_CTYPE(code,ctype) \
33   ((EncISO_8859_1_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
34 
35 static const unsigned short EncISO_8859_1_CtypeTable[256] = {
36   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
37   0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
38   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
39   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
40   0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
41   0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
42   0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
43   0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
44   0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
45   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
46   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
47   0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
48   0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
49   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
50   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
51   0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
52   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
53   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
54   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
55   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
56   0x0284, 0x01a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
57   0x00a0, 0x00a0, 0x30e2, 0x01a0, 0x00a0, 0x01a0, 0x00a0, 0x00a0,
58   0x00a0, 0x00a0, 0x10a0, 0x10a0, 0x00a0, 0x30e2, 0x00a0, 0x01a0,
59   0x00a0, 0x10a0, 0x30e2, 0x01a0, 0x10a0, 0x10a0, 0x10a0, 0x01a0,
60   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
61   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
62   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x00a0,
63   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2,
64   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
65   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
66   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0,
67   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2
68 };
69 
70 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
71   { 0xc0, 0xe0 },
72   { 0xc1, 0xe1 },
73   { 0xc2, 0xe2 },
74   { 0xc3, 0xe3 },
75   { 0xc4, 0xe4 },
76   { 0xc5, 0xe5 },
77   { 0xc6, 0xe6 },
78   { 0xc7, 0xe7 },
79   { 0xc8, 0xe8 },
80   { 0xc9, 0xe9 },
81   { 0xca, 0xea },
82   { 0xcb, 0xeb },
83   { 0xcc, 0xec },
84   { 0xcd, 0xed },
85   { 0xce, 0xee },
86   { 0xcf, 0xef },
87 
88   { 0xd0, 0xf0 },
89   { 0xd1, 0xf1 },
90   { 0xd2, 0xf2 },
91   { 0xd3, 0xf3 },
92   { 0xd4, 0xf4 },
93   { 0xd5, 0xf5 },
94   { 0xd6, 0xf6 },
95   { 0xd8, 0xf8 },
96   { 0xd9, 0xf9 },
97   { 0xda, 0xfa },
98   { 0xdb, 0xfb },
99   { 0xdc, 0xfc },
100   { 0xdd, 0xfd },
101   { 0xde, 0xfe }
102 };
103 
104 static int
apply_all_case_fold(OnigCaseFoldType flag,OnigApplyAllCaseFoldFunc f,void * arg)105 apply_all_case_fold(OnigCaseFoldType flag,
106 		    OnigApplyAllCaseFoldFunc f, void* arg)
107 {
108   return onigenc_apply_all_case_fold_with_map(
109             sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
110             flag, f, arg);
111 }
112 
113 static int
get_case_fold_codes_by_str(OnigCaseFoldType flag ARG_UNUSED,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])114 get_case_fold_codes_by_str(OnigCaseFoldType flag ARG_UNUSED,
115 			   const OnigUChar* p, const OnigUChar* end,
116 			   OnigCaseFoldCodeItem items[])
117 {
118   if (0x41 <= *p && *p <= 0x5a) {
119     items[0].byte_len = 1;
120     items[0].code_len = 1;
121     items[0].code[0] = (OnigCodePoint )(*p + 0x20);
122     if (*p == 0x53 && end > p + 1
123 	&& (*(p+1) == 0x53 || *(p+1) == 0x73)) { /* SS */
124       items[1].byte_len = 2;
125       items[1].code_len = 1;
126       items[1].code[0] = (OnigCodePoint )0xdf;
127       return 2;
128     }
129     else
130       return 1;
131   }
132   else if (0x61 <= *p && *p <= 0x7a) {
133     items[0].byte_len = 1;
134     items[0].code_len = 1;
135     items[0].code[0] = (OnigCodePoint )(*p - 0x20);
136     if (*p == 0x73 && end > p + 1
137 	&& (*(p+1) == 0x73 || *(p+1) == 0x53)) { /* ss */
138       items[1].byte_len = 2;
139       items[1].code_len = 1;
140       items[1].code[0] = (OnigCodePoint )0xdf;
141       return 2;
142     }
143     else
144       return 1;
145   }
146   else if (0xc0 <= *p && *p <= 0xcf) {
147     items[0].byte_len = 1;
148     items[0].code_len = 1;
149     items[0].code[0] = (OnigCodePoint )(*p + 0x20);
150     return 1;
151   }
152   else if (0xd0 <= *p && *p <= 0xdf) {
153     if (*p == 0xdf) {
154       items[0].byte_len = 1;
155       items[0].code_len = 2;
156       items[0].code[0] = (OnigCodePoint )'s';
157       items[0].code[1] = (OnigCodePoint )'s';
158 
159       items[1].byte_len = 1;
160       items[1].code_len = 2;
161       items[1].code[0] = (OnigCodePoint )'S';
162       items[1].code[1] = (OnigCodePoint )'S';
163 
164       items[2].byte_len = 1;
165       items[2].code_len = 2;
166       items[2].code[0] = (OnigCodePoint )'s';
167       items[2].code[1] = (OnigCodePoint )'S';
168 
169       items[3].byte_len = 1;
170       items[3].code_len = 2;
171       items[3].code[0] = (OnigCodePoint )'S';
172       items[3].code[1] = (OnigCodePoint )'s';
173 
174       return 4;
175     }
176     else if (*p != 0xd7) {
177       items[0].byte_len = 1;
178       items[0].code_len = 1;
179       items[0].code[0] = (OnigCodePoint )(*p + 0x20);
180       return 1;
181     }
182   }
183   else if (0xe0 <= *p && *p <= 0xef) {
184     items[0].byte_len = 1;
185     items[0].code_len = 1;
186     items[0].code[0] = (OnigCodePoint )(*p - 0x20);
187     return 1;
188   }
189   else if (0xf0 <= *p && *p <= 0xfe) {
190     if (*p != 0xf7) {
191       items[0].byte_len = 1;
192       items[0].code_len = 1;
193       items[0].code[0] = (OnigCodePoint )(*p - 0x20);
194       return 1;
195     }
196   }
197 
198   return 0;
199 }
200 
201 static int
mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end ARG_UNUSED,UChar * lower)202 mbc_case_fold(OnigCaseFoldType flag, const UChar** pp,
203 	      const UChar* end ARG_UNUSED, UChar* lower)
204 {
205   const UChar* p = *pp;
206 
207   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
208     *lower++ = 's';
209     *lower   = 's';
210     (*pp)++;
211     return 2;
212   }
213 
214   *lower = ONIGENC_ISO_8859_1_TO_LOWER_CASE(*p);
215   (*pp)++;
216   return 1;
217 }
218 
219 #if 0
220 static int
221 is_mbc_ambiguous(OnigCaseFoldType flag,
222 		 const UChar** pp, const UChar* end)
223 {
224   int v;
225   const UChar* p = *pp;
226 
227   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
228     (*pp)++;
229     return TRUE;
230   }
231 
232   (*pp)++;
233   v = (EncISO_8859_1_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
234   if ((v | BIT_CTYPE_LOWER) != 0) {
235     /* 0xdf, 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
236     if (*p >= 0xaa && *p <= 0xba)
237       return FALSE;
238     else
239       return TRUE;
240   }
241 
242   return (v != 0 ? TRUE : FALSE);
243 }
244 #endif
245 
246 static int
is_code_ctype(OnigCodePoint code,unsigned int ctype)247 is_code_ctype(OnigCodePoint code, unsigned int ctype)
248 {
249   if (code < 256)
250     return ENC_IS_ISO_8859_1_CTYPE(code, ctype);
251   else
252     return FALSE;
253 }
254 
255 OnigEncodingType OnigEncodingISO_8859_1 = {
256   onigenc_single_byte_mbc_enc_len,
257   "ISO-8859-1",  /* name */
258   1,             /* max enc length */
259   1,             /* min enc length */
260   onigenc_is_mbc_newline_0x0a,
261   onigenc_single_byte_mbc_to_code,
262   onigenc_single_byte_code_to_mbclen,
263   onigenc_single_byte_code_to_mbc,
264   mbc_case_fold,
265   apply_all_case_fold,
266   get_case_fold_codes_by_str,
267   onigenc_minimum_property_name_to_ctype,
268   is_code_ctype,
269   onigenc_not_support_get_ctype_code_range,
270   onigenc_single_byte_left_adjust_char_head,
271   onigenc_always_true_is_allowed_reverse_match,
272   NULL, /* init */
273   NULL, /* is_initialized */
274   onigenc_always_true_is_valid_mbc_string
275 };
276