1 /**********************************************************************
2   koi8.c -  Oniguruma (regular expression library)
3 **********************************************************************/
4 /*-
5  * Copyright (c) 2002-2019  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_KOI8_TO_LOWER_CASE(c) EncKOI8_ToLowerCaseTable[c]
33 #define ENC_IS_KOI8_CTYPE(code,ctype) \
34   ((EncKOI8_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
35 
36 static const UChar EncKOI8_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', '\241', '\242', '\243', '\244', '\245', '\246', '\247',
58   '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
59   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
60   '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
61   '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
62   '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
63   '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
64   '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337',
65   '\300', '\301', '\302', '\303', '\304', '\305', '\306', '\307',
66   '\310', '\311', '\312', '\313', '\314', '\315', '\316', '\317',
67   '\320', '\321', '\322', '\323', '\324', '\325', '\326', '\327',
68   '\330', '\331', '\332', '\333', '\334', '\335', '\336', '\337'
69 };
70 
71 static const unsigned short EncKOI8_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, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
93   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
94   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
95   0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
96   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
97   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
98   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
99   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
100   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
101   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
102   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
103   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2
104 };
105 
106 
107 static int
koi8_mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,const UChar ** pp,const UChar * end ARG_UNUSED,UChar * lower)108 koi8_mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,
109                    const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower)
110 {
111   const UChar* p = *pp;
112 
113   *lower = ENC_KOI8_TO_LOWER_CASE(*p);
114   (*pp)++;
115   return 1;
116 }
117 
118 static int
koi8_is_code_ctype(OnigCodePoint code,unsigned int ctype)119 koi8_is_code_ctype(OnigCodePoint code, unsigned int ctype)
120 {
121   if (code < 256)
122     return ENC_IS_KOI8_CTYPE(code, ctype);
123   else
124     return FALSE;
125 }
126 
127 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
128  { 0xc0, 0xe0 },
129  { 0xc1, 0xe1 },
130  { 0xc2, 0xe2 },
131  { 0xc3, 0xe3 },
132  { 0xc4, 0xe4 },
133  { 0xc5, 0xe5 },
134  { 0xc6, 0xe6 },
135  { 0xc7, 0xe7 },
136  { 0xc8, 0xe8 },
137  { 0xc9, 0xe9 },
138  { 0xca, 0xea },
139  { 0xcb, 0xeb },
140  { 0xcc, 0xec },
141  { 0xcd, 0xed },
142  { 0xce, 0xee },
143  { 0xcf, 0xef },
144 
145  { 0xd0, 0xf0 },
146  { 0xd1, 0xf1 },
147  { 0xd2, 0xf2 },
148  { 0xd3, 0xf3 },
149  { 0xd4, 0xf4 },
150  { 0xd5, 0xf5 },
151  { 0xd6, 0xf6 },
152  { 0xd7, 0xf7 },
153  { 0xd8, 0xf8 },
154  { 0xd9, 0xf9 },
155  { 0xda, 0xfa },
156  { 0xdb, 0xfb },
157  { 0xdc, 0xfc },
158  { 0xdd, 0xfd },
159  { 0xde, 0xfe },
160  { 0xdf, 0xff },
161 
162  { 0xe0, 0xc0 },
163  { 0xe1, 0xc1 },
164  { 0xe2, 0xc2 },
165  { 0xe3, 0xc3 },
166  { 0xe4, 0xc4 },
167  { 0xe5, 0xc5 },
168  { 0xe6, 0xc6 },
169  { 0xe7, 0xc7 },
170  { 0xe8, 0xc8 },
171  { 0xe9, 0xc9 },
172  { 0xea, 0xca },
173  { 0xeb, 0xcb },
174  { 0xec, 0xcc },
175  { 0xed, 0xcd },
176  { 0xee, 0xce },
177  { 0xef, 0xcf },
178 
179  { 0xf0, 0xd0 },
180  { 0xf1, 0xd1 },
181  { 0xf2, 0xd2 },
182  { 0xf3, 0xd3 },
183  { 0xf4, 0xd4 },
184  { 0xf5, 0xd5 },
185  { 0xf6, 0xd6 },
186  { 0xf7, 0xd7 },
187  { 0xf8, 0xd8 },
188  { 0xf9, 0xd9 },
189  { 0xfa, 0xda },
190  { 0xfb, 0xdb },
191  { 0xfc, 0xdc },
192  { 0xfe, 0xde },
193  { 0xff, 0xdf }
194 };
195 
196 static int
koi8_apply_all_case_fold(OnigCaseFoldType flag,OnigApplyAllCaseFoldFunc f,void * arg)197 koi8_apply_all_case_fold(OnigCaseFoldType flag,
198                          OnigApplyAllCaseFoldFunc f, void* arg)
199 {
200   return onigenc_apply_all_case_fold_with_map(
201              sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 0,
202              flag, f, arg);
203 }
204 
205 static int
koi8_get_case_fold_codes_by_str(OnigCaseFoldType flag,const OnigUChar * p,const OnigUChar * end,OnigCaseFoldCodeItem items[])206 koi8_get_case_fold_codes_by_str(OnigCaseFoldType flag,
207     const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
208 {
209   return onigenc_get_case_fold_codes_by_str_with_map(
210                  sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 0,
211                  flag, p, end, items);
212 }
213 
214 OnigEncodingType OnigEncodingKOI8 = {
215   onigenc_single_byte_mbc_enc_len,
216   "KOI8",        /* name */
217   1,             /* max enc length */
218   1,             /* min enc length */
219   onigenc_is_mbc_newline_0x0a,
220   onigenc_single_byte_mbc_to_code,
221   onigenc_single_byte_code_to_mbclen,
222   onigenc_single_byte_code_to_mbc,
223   koi8_mbc_case_fold,
224   koi8_apply_all_case_fold,
225   koi8_get_case_fold_codes_by_str,
226   onigenc_minimum_property_name_to_ctype,
227   koi8_is_code_ctype,
228   onigenc_not_support_get_ctype_code_range,
229   onigenc_single_byte_left_adjust_char_head,
230   onigenc_always_true_is_allowed_reverse_match,
231   NULL, /* init */
232   NULL, /* is_initialized */
233   onigenc_always_true_is_valid_mbc_string,
234   ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1,
235   0, 0
236 };
237