1/**********************************************************************
2  iso8859_4.c -  Oniguruma (regular expression library)
3**********************************************************************/
4/*-
5 * Copyright (c) 2002-2007  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_ISO_8859_4_TO_LOWER_CASE(c) EncISO_8859_4_ToLowerCaseTable[c]
33#define ENC_IS_ISO_8859_4_CTYPE(code,ctype) \
34  ((EncISO_8859_4_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
35
36static const UChar EncISO_8859_4_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', '\261', '\242', '\263', '\244', '\265', '\266', '\247',
58  '\250', '\271', '\272', '\273', '\274', '\255', '\276', '\257',
59  '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
60  '\270', '\271', '\272', '\273', '\274', '\277', '\276', '\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', '\327',
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
71static const unsigned short EncISO_8859_4_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, 0x34a2, 0x34a2, 0x00a0,
93  0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x00a0,
94  0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x30e2, 0x00a0,
95  0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x34a2, 0x30e2, 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, 0x00a0,
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, 0x00a0,
103  0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0
104};
105
106static int
107mbc_case_fold(OnigCaseFoldType flag,
108	      const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower,
109	      OnigEncoding enc ARG_UNUSED)
110{
111  const UChar* p = *pp;
112
113  if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
114    *lower++ = 's';
115    *lower   = 's';
116    (*pp)++;
117    return 2;
118  }
119
120  *lower = ENC_ISO_8859_4_TO_LOWER_CASE(*p);
121  (*pp)++;
122  return 1; /* return byte length of converted char to lower */
123}
124
125#if 0
126static int
127is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
128{
129  int v;
130  const UChar* p = *pp;
131
132  if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
133    (*pp)++;
134    return TRUE;
135  }
136
137  (*pp)++;
138  v = (EncISO_8859_4_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
139  if ((v | BIT_CTYPE_LOWER) != 0) {
140    if (*p == 0xa2)
141      return FALSE;
142    else
143      return TRUE;
144  }
145
146  return (v != 0 ? TRUE : FALSE);
147}
148#endif
149
150static int
151is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
152{
153  if (code < 256)
154    return ENC_IS_ISO_8859_4_CTYPE(code, ctype);
155  else
156    return FALSE;
157}
158
159static const OnigPairCaseFoldCodes CaseFoldMap[] = {
160 { 0xa1, 0xb1 },
161 { 0xa3, 0xb3 },
162 { 0xa5, 0xb5 },
163 { 0xa6, 0xb6 },
164 { 0xa9, 0xb9 },
165 { 0xaa, 0xba },
166 { 0xab, 0xbb },
167 { 0xac, 0xbc },
168 { 0xae, 0xbe },
169
170 { 0xc0, 0xe0 },
171 { 0xc1, 0xe1 },
172 { 0xc2, 0xe2 },
173 { 0xc3, 0xe3 },
174 { 0xc4, 0xe4 },
175 { 0xc5, 0xe5 },
176 { 0xc6, 0xe6 },
177 { 0xc7, 0xe7 },
178 { 0xc8, 0xe8 },
179 { 0xc9, 0xe9 },
180 { 0xca, 0xea },
181 { 0xcb, 0xeb },
182 { 0xcc, 0xec },
183 { 0xcd, 0xed },
184 { 0xce, 0xee },
185 { 0xcf, 0xef },
186
187 { 0xd0, 0xf0 },
188 { 0xd1, 0xf1 },
189 { 0xd2, 0xf2 },
190 { 0xd3, 0xf3 },
191 { 0xd4, 0xf4 },
192 { 0xd5, 0xf5 },
193 { 0xd6, 0xf6 },
194 { 0xd8, 0xf8 },
195 { 0xd9, 0xf9 },
196 { 0xda, 0xfa },
197 { 0xdb, 0xfb },
198 { 0xdc, 0xfc },
199 { 0xdd, 0xfd },
200 { 0xde, 0xfe }
201};
202
203static int
204apply_all_case_fold(OnigCaseFoldType flag,
205		    OnigApplyAllCaseFoldFunc f, void* arg,
206		    OnigEncoding enc ARG_UNUSED)
207{
208  return onigenc_apply_all_case_fold_with_map(
209             sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
210             flag, f, arg);
211}
212
213static int
214get_case_fold_codes_by_str(OnigCaseFoldType flag,
215			   const OnigUChar* p, const OnigUChar* end,
216			   OnigCaseFoldCodeItem items[],
217			   OnigEncoding enc ARG_UNUSED)
218{
219  return onigenc_get_case_fold_codes_by_str_with_map(
220	     sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
221	     flag, p, end, items);
222}
223
224OnigEncodingDefine(iso_8859_4, ISO_8859_4) = {
225  onigenc_single_byte_mbc_enc_len,
226  "ISO-8859-4",  /* name */
227  1,             /* max enc length */
228  1,             /* min enc length */
229  onigenc_is_mbc_newline_0x0a,
230  onigenc_single_byte_mbc_to_code,
231  onigenc_single_byte_code_to_mbclen,
232  onigenc_single_byte_code_to_mbc,
233  mbc_case_fold,
234  apply_all_case_fold,
235  get_case_fold_codes_by_str,
236  onigenc_minimum_property_name_to_ctype,
237  is_code_ctype,
238  onigenc_not_support_get_ctype_code_range,
239  onigenc_single_byte_left_adjust_char_head,
240  onigenc_always_true_is_allowed_reverse_match,
241  0,
242  ONIGENC_FLAG_NONE,
243};
244ENC_ALIAS("ISO8859-4", "ISO-8859-4")
245