enc/iso_8859_2.c

   1 /**********************************************************************
   2   iso8859_2.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 #include "iso_8859.h"
  32
  33 #define ENC_ISO_8859_2_TO_LOWER_CASE(c) EncISO_8859_2_ToLowerCaseTable[c]
  34 #define ENC_IS_ISO_8859_2_CTYPE(code,ctype) \
  35   ((EncISO_8859_2_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  36
  37 static const UChar EncISO_8859_2_ToLowerCaseTable[256] = {
  38   '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
  39   '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
  40   '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
  41   '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
  42   '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
  43   '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
  44   '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
  45   '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
  46   '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  47   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  48   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  49   '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
  50   '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  51   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  52   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  53   '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
  54   '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
  55   '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
  56   '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
  57   '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
  58   '\240', '\261', '\242', '\263', '\244', '\265', '\266', '\247',
  59   '\250', '\271', '\272', '\273', '\274', '\255', '\276', '\277',
  60   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
  61   '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
  62   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  63   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  64   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\327',
  65   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\337',
  66   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  67   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  68   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
  69   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
  70 };
  71
  72 static const unsigned short EncISO_8859_2_CtypeTable[256] = {
  73   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  74   0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
  75   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  76   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  77   0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  78   0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  79   0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
  80   0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  81   0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
  82   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  83   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  84   0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
  85   0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
  86   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  87   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  88   0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
  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   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  93   0x0284, 0x34a2, 0x00a0, 0x34a2, 0x00a0, 0x34a2, 0x34a2, 0x00a0,
  94   0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x34a2,
  95   0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x30e2, 0x00a0,
  96   0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0, 0x30e2, 0x30e2,
  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, 0x00a0,
 100   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 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, 0x00a0,
 104   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0
 105 };
 106
 107 static int
 108 mbc_case_fold(OnigCaseFoldType flag,
 109               const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower,
 110               OnigEncoding enc ARG_UNUSED)
 111 {
 112   const UChar* p = *pp;
 113
 114   if (*p == SHARP_s && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
 115     *lower++ = 's';
 116     *lower   = 's';
 117     (*pp)++;
 118     return 2;
 119   }
 120
 121   *lower = ENC_ISO_8859_2_TO_LOWER_CASE(*p);
 122   (*pp)++;
 123   return 1; /* return byte length of converted char to lower */
 124 }
 125
 126 #if 0
 127 static int
 128 is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
 129 {
 130   int v;
 131   const UChar* p = *pp;
 132
 133   if (*p == SHARP_s && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
 134     (*pp)++;
 135     return TRUE;
 136   }
 137
 138   (*pp)++;
 139   v = (EncISO_8859_2_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
 140   if ((v | BIT_CTYPE_LOWER) != 0) {
 141     return TRUE;
 142   }
 143
 144   return (v != 0 ? TRUE : FALSE);
 145 }
 146 #endif
 147
 148 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 149  { 0xa1, 0xb1 },
 150  { 0xa3, 0xb3 },
 151  { 0xa5, 0xb5 },
 152  { 0xa6, 0xb6 },
 153  { 0xa9, 0xb9 },
 154  { 0xaa, 0xba },
 155  { 0xab, 0xbb },
 156  { 0xac, 0xbc },
 157  { 0xae, 0xbe },
 158  { 0xaf, 0xbf },
 159
 160  { 0xc0, 0xe0 },
 161  { 0xc1, 0xe1 },
 162  { 0xc2, 0xe2 },
 163  { 0xc3, 0xe3 },
 164  { 0xc4, 0xe4 },
 165  { 0xc5, 0xe5 },
 166  { 0xc6, 0xe6 },
 167  { 0xc7, 0xe7 },
 168  { 0xc8, 0xe8 },
 169  { 0xc9, 0xe9 },
 170  { 0xca, 0xea },
 171  { 0xcb, 0xeb },
 172  { 0xcc, 0xec },
 173  { 0xcd, 0xed },
 174  { 0xce, 0xee },
 175  { 0xcf, 0xef },
 176
 177  { 0xd0, 0xf0 },
 178  { 0xd1, 0xf1 },
 179  { 0xd2, 0xf2 },
 180  { 0xd3, 0xf3 },
 181  { 0xd4, 0xf4 },
 182  { 0xd5, 0xf5 },
 183  { 0xd6, 0xf6 },
 184  { 0xd8, 0xf8 },
 185  { 0xd9, 0xf9 },
 186  { 0xda, 0xfa },
 187  { 0xdb, 0xfb },
 188  { 0xdc, 0xfc },
 189  { 0xdd, 0xfd },
 190  { 0xde, 0xfe }
 191 };
 192
 193 static int
 194 apply_all_case_fold(OnigCaseFoldType flag,
 195                     OnigApplyAllCaseFoldFunc f, void* arg,
 196                     OnigEncoding enc ARG_UNUSED)
 197 {
 198   return onigenc_apply_all_case_fold_with_map(
 199             numberof(CaseFoldMap), CaseFoldMap, 1,
 200             flag, f, arg);
 201 }
 202
 203 static int
 204 get_case_fold_codes_by_str(OnigCaseFoldType flag,
 205                            const OnigUChar* p, const OnigUChar* end,
 206                            OnigCaseFoldCodeItem items[],
 207                            OnigEncoding enc ARG_UNUSED)
 208 {
 209   return onigenc_get_case_fold_codes_by_str_with_map(
 210              numberof(CaseFoldMap), CaseFoldMap, 1,
 211              flag, p, end, items);
 212 }
 213
 214 static int
 215 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
 216 {
 217   if (code < 256)
 218     return ENC_IS_ISO_8859_2_CTYPE(code, ctype);
 219   else
 220     return FALSE;
 221 }
 222
 223 static int
 224 case_map(OnigCaseFoldType* flagP, const OnigUChar** pp,
 225          const OnigUChar* end, OnigUChar* to, OnigUChar* to_end,
 226          const struct OnigEncodingTypeST* enc)
 227 {
 228   OnigCodePoint code;
 229   OnigUChar *to_start = to;
 230   OnigCaseFoldType flags = *flagP;
 231
 232   while (*pp < end && to < to_end) {
 233     code = *(*pp)++;
 234     if (code == SHARP_s) {
 235       if (flags & ONIGENC_CASE_UPCASE) {
 236         flags |= ONIGENC_CASE_MODIFIED;
 237         *to++ = 'S';
 238         code = (flags & ONIGENC_CASE_TITLECASE) ? 's' : 'S';
 239       }
 240       else if (flags & ONIGENC_CASE_FOLD) {
 241         flags |= ONIGENC_CASE_MODIFIED;
 242         *to++ = 's';
 243         code = 's';
 244       }
 245     }
 246     else if ((EncISO_8859_2_CtypeTable[code] & BIT_CTYPE_UPPER)
 247              && (flags & (ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_FOLD))) {
 248       flags |= ONIGENC_CASE_MODIFIED;
 249       code = ENC_ISO_8859_2_TO_LOWER_CASE(code);
 250     }
 251     else if ((EncISO_8859_2_CtypeTable[code] & BIT_CTYPE_LOWER)
 252        && (flags & ONIGENC_CASE_UPCASE)) {
 253       if (code >= 0xB1 && code <= 0xBF) {
 254         flags |= ONIGENC_CASE_MODIFIED;
 255         code -= 0x10;
 256       }
 257       else {
 258         flags |= ONIGENC_CASE_MODIFIED;
 259         code -= 0x20;
 260       }
 261     }
 262     *to++ = code;
 263     if (flags & ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
 264       flags ^= (ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_TITLECASE);
 265   }
 266   *flagP = flags;
 267   return (int )(to - to_start);
 268 }
 269
 270 OnigEncodingDefine(iso_8859_2, ISO_8859_2) = {
 271   onigenc_single_byte_mbc_enc_len,
 272   "ISO-8859-2",  /* name */
 273   1,             /* max enc length */
 274   1,             /* min enc length */
 275   onigenc_is_mbc_newline_0x0a,
 276   onigenc_single_byte_mbc_to_code,
 277   onigenc_single_byte_code_to_mbclen,
 278   onigenc_single_byte_code_to_mbc,
 279   mbc_case_fold,
 280   apply_all_case_fold,
 281   get_case_fold_codes_by_str,
 282   onigenc_minimum_property_name_to_ctype,
 283   is_code_ctype,
 284   onigenc_not_support_get_ctype_code_range,
 285   onigenc_single_byte_left_adjust_char_head,
 286   onigenc_always_true_is_allowed_reverse_match,
 287   case_map,
 288   0,
 289   ONIGENC_FLAG_NONE,
 290 };
 291 ENC_ALIAS("ISO8859-2", "ISO-8859-2")