1/**********************************************************************
2  koi8_r.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 "regenc.h"
31
32#define ENC_KOI8_R_TO_LOWER_CASE(c) EncKOI8_R_ToLowerCaseTable[c]
33#define ENC_IS_KOI8_R_CTYPE(code,ctype) \
34  ((EncKOI8_R_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
35
36static const UChar EncKOI8_R_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', '\243', '\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
71static const unsigned short EncKOI8_R_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  0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
89  0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
90  0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
91  0x00a0, 0x00a0, 0x0284, 0x00a0, 0x00a0, 0x10a0, 0x01a0, 0x00a0,
92  0x00a0, 0x00a0, 0x00a0, 0x30e2, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
93  0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
94  0x00a0, 0x00a0, 0x00a0, 0x34a2, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
95  0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0,
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
106static int
107koi8_r_mbc_case_fold(OnigCaseFoldType flag ARG_UNUSED,
108		     const UChar** pp, const UChar* end ARG_UNUSED,
109		     UChar* lower, OnigEncoding enc ARG_UNUSED)
110{
111  const UChar* p = *pp;
112
113  *lower = ENC_KOI8_R_TO_LOWER_CASE(*p);
114  (*pp)++;
115  return 1;
116}
117
118#if 0
119static int
120koi8_r_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp,
121			const UChar* end, OnigEncoding enc ARG_UNUSED)
122{
123  int v;
124  const UChar* p = *pp;
125
126  (*pp)++;
127  v = (EncKOI8_R_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
128  return (v != 0 ? TRUE : FALSE);
129}
130#endif
131
132static int
133koi8_r_is_code_ctype(OnigCodePoint code, unsigned int ctype,
134		     OnigEncoding enc ARG_UNUSED)
135{
136  if (code < 256)
137    return ENC_IS_KOI8_R_CTYPE(code, ctype);
138  else
139    return FALSE;
140}
141
142static const OnigPairCaseFoldCodes CaseFoldMap[] = {
143  { 0xa3, 0xb3 },
144
145  { 0xc0, 0xe0 },
146  { 0xc1, 0xe1 },
147  { 0xc2, 0xe2 },
148  { 0xc3, 0xe3 },
149  { 0xc4, 0xe4 },
150  { 0xc5, 0xe5 },
151  { 0xc6, 0xe6 },
152  { 0xc7, 0xe7 },
153  { 0xc8, 0xe8 },
154  { 0xc9, 0xe9 },
155  { 0xca, 0xea },
156  { 0xcb, 0xeb },
157  { 0xcc, 0xec },
158  { 0xcd, 0xed },
159  { 0xce, 0xee },
160  { 0xcf, 0xef },
161
162  { 0xd0, 0xf0 },
163  { 0xd1, 0xf1 },
164  { 0xd2, 0xf2 },
165  { 0xd3, 0xf3 },
166  { 0xd4, 0xf4 },
167  { 0xd5, 0xf5 },
168  { 0xd6, 0xf6 },
169  { 0xd7, 0xf7 },
170  { 0xd8, 0xf8 },
171  { 0xd9, 0xf9 },
172  { 0xda, 0xfa },
173  { 0xdb, 0xfb },
174  { 0xdc, 0xfc },
175  { 0xdd, 0xfd },
176  { 0xde, 0xfe },
177  { 0xdf, 0xff }
178};
179
180static int
181koi8_r_apply_all_case_fold(OnigCaseFoldType flag,
182			   OnigApplyAllCaseFoldFunc f,
183			   void* arg, OnigEncoding enc ARG_UNUSED)
184{
185  return onigenc_apply_all_case_fold_with_map(
186             sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 0,
187             flag, f, arg);
188}
189
190static int
191koi8_r_get_case_fold_codes_by_str(OnigCaseFoldType flag,
192		  const OnigUChar* p, const OnigUChar* end,
193		  OnigCaseFoldCodeItem items[], OnigEncoding enc ARG_UNUSED)
194{
195  return onigenc_get_case_fold_codes_by_str_with_map(
196	     sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 0,
197	     flag, p, end, items);
198}
199
200OnigEncodingDefine(koi8_r, KOI8_R) = {
201  onigenc_single_byte_mbc_enc_len,
202  "KOI8-R",       /* name */
203  1,             /* max enc length */
204  1,             /* min enc length */
205  onigenc_is_mbc_newline_0x0a,
206  onigenc_single_byte_mbc_to_code,
207  onigenc_single_byte_code_to_mbclen,
208  onigenc_single_byte_code_to_mbc,
209  koi8_r_mbc_case_fold,
210  koi8_r_apply_all_case_fold,
211  koi8_r_get_case_fold_codes_by_str,
212  onigenc_minimum_property_name_to_ctype,
213  koi8_r_is_code_ctype,
214  onigenc_not_support_get_ctype_code_range,
215  onigenc_single_byte_left_adjust_char_head,
216  onigenc_always_true_is_allowed_reverse_match,
217  0,
218  ONIGENC_FLAG_NONE,
219};
220ENC_ALIAS("CP878", "KOI8-R")
221
222