enc/iso_8859_3.c

   1 /**********************************************************************
   2   iso8859_3.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_3_TO_LOWER_CASE(c) EncISO_8859_3_ToLowerCaseTable[c]
  34 #define ENC_IS_ISO_8859_3_CTYPE(code,ctype) \
  35   ((EncISO_8859_3_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  36
  37 static const UChar EncISO_8859_3_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', '\243', '\244', '\245', '\266', '\247',
  59   '\250', '\151', '\272', '\273', '\274', '\255', '\256', '\277',
  60   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
  61   '\270', '\271', '\272', '\273', '\274', '\275', '\276', '\277',
  62   '\340', '\341', '\342', '\303', '\344', '\345', '\346', '\347',
  63   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  64   '\320', '\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_3_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, 0x00a0, 0x00a0, 0x0000, 0x34a2, 0x00a0,
  94   0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x0000, 0x34a2,
  95   0x00a0, 0x30e2, 0x10a0, 0x10a0, 0x00a0, 0x30e2, 0x30e2, 0x01a0,
  96   0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x11a0, 0x0000, 0x30e2,
  97   0x34a2, 0x34a2, 0x34a2, 0x0000, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  98   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  99   0x0000, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x00a0,
 100   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2,
 101   0x30e2, 0x30e2, 0x30e2, 0x0000, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
 102   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
 103   0x0000, 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_3_TO_LOWER_CASE(*p);
 122   (*pp)++;
 123   return 1;
 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_3_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
 140   if ((v | BIT_CTYPE_LOWER) != 0) {
 141     /* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
 142     if (*p == 0xb5)
 143       return FALSE;
 144     else
 145       return TRUE;
 146   }
 147
 148   return (v != 0 ? TRUE : FALSE);
 149 }
 150 #endif
 151
 152 static int
 153 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
 154 {
 155   if (code < 256)
 156     return ENC_IS_ISO_8859_3_CTYPE(code, ctype);
 157   else
 158     return FALSE;
 159 }
 160
 161 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 162  { 0xa1, 0xb1 },
 163  { 0xa6, 0xb6 },
 164  /*{ 0xa9, 0xb9 }, exclude dotless i/I with dot; not a case pair */
 165  { 0xaa, 0xba },
 166  { 0xab, 0xbb },
 167  { 0xac, 0xbc },
 168  { 0xaf, 0xbf },
 169
 170  { 0xc0, 0xe0 },
 171  { 0xc1, 0xe1 },
 172  { 0xc2, 0xe2 },
 173  { 0xc4, 0xe4 },
 174  { 0xc5, 0xe5 },
 175  { 0xc6, 0xe6 },
 176  { 0xc7, 0xe7 },
 177  { 0xc8, 0xe8 },
 178  { 0xc9, 0xe9 },
 179  { 0xca, 0xea },
 180  { 0xcb, 0xeb },
 181  { 0xcc, 0xec },
 182  { 0xcd, 0xed },
 183  { 0xce, 0xee },
 184  { 0xcf, 0xef },
 185
 186  { 0xd1, 0xf1 },
 187  { 0xd2, 0xf2 },
 188  { 0xd3, 0xf3 },
 189  { 0xd4, 0xf4 },
 190  { 0xd5, 0xf5 },
 191  { 0xd6, 0xf6 },
 192  { 0xd8, 0xf8 },
 193  { 0xd9, 0xf9 },
 194  { 0xda, 0xfa },
 195  { 0xdb, 0xfb },
 196  { 0xdc, 0xfc },
 197  { 0xdd, 0xfd },
 198  { 0xde, 0xfe }
 199 };
 200
 201
 202 static int
 203 apply_all_case_fold(OnigCaseFoldType flag,
 204                     OnigApplyAllCaseFoldFunc f, void* arg,
 205                     OnigEncoding enc ARG_UNUSED)
 206 {
 207   return onigenc_apply_all_case_fold_with_map(
 208              numberof(CaseFoldMap), CaseFoldMap, 1,
 209              flag, f, arg);
 210 }
 211
 212 static int
 213 get_case_fold_codes_by_str(OnigCaseFoldType flag,
 214                            const OnigUChar* p, const OnigUChar* end,
 215                            OnigCaseFoldCodeItem items[],
 216                            OnigEncoding enc ARG_UNUSED)
 217 {
 218   return onigenc_get_case_fold_codes_by_str_with_map(
 219              numberof(CaseFoldMap), CaseFoldMap, 1,
 220              flag, p, end, items);
 221 }
 222
 223 #define DOTLESS_i        (0xB9)
 224 #define I_WITH_DOT_ABOVE (0xA9)
 225 static int
 226 case_map(OnigCaseFoldType* flagP, const OnigUChar** pp,
 227          const OnigUChar* end, OnigUChar* to, OnigUChar* to_end,
 228          const struct OnigEncodingTypeST* enc)
 229 {
 230   OnigCodePoint code;
 231   OnigUChar *to_start = to;
 232   OnigCaseFoldType flags = *flagP;
 233
 234   while (*pp < end && to < to_end) {
 235     code = *(*pp)++;
 236     if (code == SHARP_s) {
 237       if (flags & ONIGENC_CASE_UPCASE) {
 238         flags |= ONIGENC_CASE_MODIFIED;
 239         *to++ = 'S';
 240         code = (flags & ONIGENC_CASE_TITLECASE) ? 's' : 'S';
 241       }
 242       else if (flags & ONIGENC_CASE_FOLD) {
 243         flags |= ONIGENC_CASE_MODIFIED;
 244         *to++ = 's';
 245         code = 's';
 246       }
 247     }
 248     else if (code == 0xB5)
 249       ;
 250     else if ((EncISO_8859_3_CtypeTable[code] & BIT_CTYPE_UPPER)
 251              && (flags & (ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_FOLD))) {
 252       flags |= ONIGENC_CASE_MODIFIED;
 253       if (code == 'I')
 254         code = flags & ONIGENC_CASE_FOLD_TURKISH_AZERI ? DOTLESS_i : 'i';
 255       else
 256         code = ENC_ISO_8859_3_TO_LOWER_CASE(code);
 257     }
 258     else if ((EncISO_8859_3_CtypeTable[code]&BIT_CTYPE_LOWER)
 259              && (flags & ONIGENC_CASE_UPCASE)) {
 260       flags |= ONIGENC_CASE_MODIFIED;
 261       if (code == 'i')
 262         code = flags & ONIGENC_CASE_FOLD_TURKISH_AZERI ? I_WITH_DOT_ABOVE : 'I';
 263       else if (code == DOTLESS_i)
 264         code = 'I';
 265       else if (code >= 0xB0 && code <= 0xBF) {
 266         code -= 0x10;
 267       }
 268       else {
 269         code -= 0x20;
 270       }
 271     }
 272     *to++ = code;
 273     if (flags & ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
 274       flags ^= (ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_TITLECASE);
 275   }
 276   *flagP = flags;
 277   return (int )(to - to_start);
 278 }
 279
 280 OnigEncodingDefine(iso_8859_3, ISO_8859_3) = {
 281   onigenc_single_byte_mbc_enc_len,
 282   "ISO-8859-3",  /* name */
 283   1,             /* max enc length */
 284   1,             /* min enc length */
 285   onigenc_is_mbc_newline_0x0a,
 286   onigenc_single_byte_mbc_to_code,
 287   onigenc_single_byte_code_to_mbclen,
 288   onigenc_single_byte_code_to_mbc,
 289   mbc_case_fold,
 290   apply_all_case_fold,
 291   get_case_fold_codes_by_str,
 292   onigenc_minimum_property_name_to_ctype,
 293   is_code_ctype,
 294   onigenc_not_support_get_ctype_code_range,
 295   onigenc_single_byte_left_adjust_char_head,
 296   onigenc_always_true_is_allowed_reverse_match,
 297   case_map,
 298   0,
 299   ONIGENC_FLAG_NONE,
 300 };
 301 ENC_ALIAS("ISO8859-3", "ISO-8859-3")