1 /**********************************************************************
2   iso8859_16.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 "regenc.h"
31 
32 #define ENC_ISO_8859_16_TO_LOWER_CASE(c) EncISO_8859_16_ToLowerCaseTable[c]
33 #define ENC_IS_ISO_8859_16_CTYPE(code,ctype) \
34   ((EncISO_8859_16_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
35 
36 static const UChar EncISO_8859_16_ToLowerCaseTable[256] = {
37   '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
38   '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
39   '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
40   '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
41   '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
42   '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
43   '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
44   '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
45   '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
46   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
47   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
48   '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
49   '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
50   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
51   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
52   '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
53   '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
54   '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
55   '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
56   '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
57   '\240', '\242', '\242', '\263', '\245', '\245', '\250', '\247',
58   '\250', '\251', '\272', '\253', '\256', '\255', '\256', '\277',
59   '\260', '\261', '\271', '\263', '\270', '\265', '\266', '\267',
60   '\270', '\271', '\272', '\273', '\275', '\275', '\377', '\277',
61   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
62   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
63   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
64   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\337',
65   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
66   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
67   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
68   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
69 };
70 
71 static const unsigned short EncISO_8859_16_CtypeTable[256] = {
72   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
73   0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
74   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
75   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
76   0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
77   0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
78   0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
79   0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
80   0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
81   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
82   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
83   0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
84   0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
85   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
86   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
87   0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
88   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
89   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
90   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
91   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
92   0x0284, 0x34a2, 0x30e2, 0x34a2, 0x00a0, 0x01a0, 0x34a2, 0x00a0,
93   0x30e2, 0x00a0, 0x34a2, 0x01a0, 0x34a2, 0x01a0, 0x30e2, 0x34a2,
94   0x00a0, 0x00a0, 0x34a2, 0x30e2, 0x34a2, 0x01a0, 0x00a0, 0x01a0,
95   0x30e2, 0x30e2, 0x30e2, 0x01a0, 0x34a2, 0x30e2, 0x34a2, 0x30e2,
96   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
97   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
98   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
99   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2,
100   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
101   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
102   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
103   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2
104 };
105 
106 static int
mbc_case_fold(OnigCaseFoldType flag,const UChar ** pp,const UChar * end ARG_UNUSED,UChar * lower)107 mbc_case_fold(OnigCaseFoldType flag,
108               const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower)
109 {
110   const UChar* p = *pp;
111 
112   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
113     *lower++ = 's';
114     *lower   = 's';
115     (*pp)++;
116     return 2;
117   }
118 
119   if (CASE_FOLD_IS_NOT_ASCII_ONLY(flag) || ONIGENC_IS_ASCII_CODE(*p))
120     *lower = ENC_ISO_8859_16_TO_LOWER_CASE(*p);
121   else
122     *lower = *p;
123 
124   (*pp)++;
125   return 1; /* return byte length of converted char to lower */
126 }
127 
128 static int
is_code_ctype(OnigCodePoint code,unsigned int ctype)129 is_code_ctype(OnigCodePoint code, unsigned int ctype)
130 {
131   if (code < 256)
132     return ENC_IS_ISO_8859_16_CTYPE(code, ctype);
133   else
134     return FALSE;
135 }
136 
137 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
138  { 0xa1, 0xa2 },
139  { 0xa3, 0xb3 },
140  { 0xa6, 0xa8 },
141  { 0xaa, 0xba },
142  { 0xac, 0xae },
143  { 0xaf, 0xbf },
144 
145  { 0xb2, 0xb9 },
146  { 0xb4, 0xb8 },
147  { 0xbc, 0xbd },
148  { 0xbe, 0xff },
149 
150  { 0xc0, 0xe0 },
151  { 0xc1, 0xe1 },
152  { 0xc2, 0xe2 },
153  { 0xc3, 0xe3 },
154  { 0xc4, 0xe4 },
155  { 0xc5, 0xe5 },
156  { 0xc6, 0xe6 },
157  { 0xc7, 0xe7 },
158  { 0xc8, 0xe8 },
159  { 0xc9, 0xe9 },
160  { 0xca, 0xea },
161  { 0xcb, 0xeb },
162  { 0xcc, 0xec },
163  { 0xcd, 0xed },
164  { 0xce, 0xee },
165  { 0xcf, 0xef },
166 
167  { 0xd0, 0xf0 },
168  { 0xd1, 0xf1 },
169  { 0xd2, 0xf2 },
170  { 0xd3, 0xf3 },
171  { 0xd4, 0xf4 },
172  { 0xd5, 0xf5 },
173  { 0xd6, 0xf6 },
174  { 0xd7, 0xf7 },
175  { 0xd8, 0xf8 },
176  { 0xd9, 0xf9 },
177  { 0xda, 0xfa },
178  { 0xdb, 0xfb },
179  { 0xdc, 0xfc },
180  { 0xdd, 0xfd },
181  { 0xde, 0xfe }
182 };
183 
184 static int
apply_all_case_fold(OnigCaseFoldType flag,OnigApplyAllCaseFoldFunc f,void * arg)185 apply_all_case_fold(OnigCaseFoldType flag,
186                     OnigApplyAllCaseFoldFunc f, void* arg)
187 {
188   return onigenc_apply_all_case_fold_with_map(
189              sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
190              flag, f, arg);
191 }
192 
193 static int
get_case_fold_codes_by_str(OnigCaseFoldType flag,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])194 get_case_fold_codes_by_str(OnigCaseFoldType flag,
195     const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
196 {
197   return onigenc_get_case_fold_codes_by_str_with_map(
198                  sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
199                  flag, p, end, items);
200 }
201 
202 OnigEncodingType OnigEncodingISO_8859_16 = {
203   onigenc_single_byte_mbc_enc_len,
204   "ISO-8859-16",  /* name */
205   1,             /* max enc length */
206   1,             /* min enc length */
207   onigenc_is_mbc_newline_0x0a,
208   onigenc_single_byte_mbc_to_code,
209   onigenc_single_byte_code_to_mbclen,
210   onigenc_single_byte_code_to_mbc,
211   mbc_case_fold,
212   apply_all_case_fold,
213   get_case_fold_codes_by_str,
214   onigenc_minimum_property_name_to_ctype,
215   is_code_ctype,
216   onigenc_not_support_get_ctype_code_range,
217   onigenc_single_byte_left_adjust_char_head,
218   onigenc_always_true_is_allowed_reverse_match,
219   NULL, /* init */
220   NULL, /* is_initialized */
221   onigenc_always_true_is_valid_mbc_string,
222   ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1,
223   0, 0
224 };
225