enc/iso_8859_4.c

   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 #include "iso_8859.h"
  32
  33 #define ENC_ISO_8859_4_TO_LOWER_CASE(c) EncISO_8859_4_ToLowerCaseTable[c]
  34 #define ENC_IS_ISO_8859_4_CTYPE(code,ctype) \
  35   ((EncISO_8859_4_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  36
  37 static const UChar EncISO_8859_4_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', '\257',
  60   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
  61   '\270', '\271', '\272', '\273', '\274', '\277', '\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_4_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, 0x30e2, 0x34a2, 0x00a0, 0x34a2, 0x34a2, 0x00a0,
  94   0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x00a0,
  95   0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x30e2, 0x00a0,
  96   0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x34a2, 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_4_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_4_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
 140   if ((v | BIT_CTYPE_LOWER) != 0) {
 141     if (*p == 0xa2)
 142       return FALSE;
 143     else
 144       return TRUE;
 145   }
 146
 147   return (v != 0 ? TRUE : FALSE);
 148 }
 149 #endif
 150
 151 static int
 152 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
 153 {
 154   if (code < 256)
 155     return ENC_IS_ISO_8859_4_CTYPE(code, ctype);
 156   else
 157     return FALSE;
 158 }
 159
 160 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 161  { 0xa1, 0xb1 },
 162  { 0xa3, 0xb3 },
 163  { 0xa5, 0xb5 },
 164  { 0xa6, 0xb6 },
 165  { 0xa9, 0xb9 },
 166  { 0xaa, 0xba },
 167  { 0xab, 0xbb },
 168  { 0xac, 0xbc },
 169  { 0xae, 0xbe },
 170  { 0xbd, 0xbf },
 171
 172  { 0xc0, 0xe0 },
 173  { 0xc1, 0xe1 },
 174  { 0xc2, 0xe2 },
 175  { 0xc3, 0xe3 },
 176  { 0xc4, 0xe4 },
 177  { 0xc5, 0xe5 },
 178  { 0xc6, 0xe6 },
 179  { 0xc7, 0xe7 },
 180  { 0xc8, 0xe8 },
 181  { 0xc9, 0xe9 },
 182  { 0xca, 0xea },
 183  { 0xcb, 0xeb },
 184  { 0xcc, 0xec },
 185  { 0xcd, 0xed },
 186  { 0xce, 0xee },
 187  { 0xcf, 0xef },
 188
 189  { 0xd0, 0xf0 },
 190  { 0xd1, 0xf1 },
 191  { 0xd2, 0xf2 },
 192  { 0xd3, 0xf3 },
 193  { 0xd4, 0xf4 },
 194  { 0xd5, 0xf5 },
 195  { 0xd6, 0xf6 },
 196  { 0xd8, 0xf8 },
 197  { 0xd9, 0xf9 },
 198  { 0xda, 0xfa },
 199  { 0xdb, 0xfb },
 200  { 0xdc, 0xfc },
 201  { 0xdd, 0xfd },
 202  { 0xde, 0xfe }
 203 };
 204
 205 static int
 206 apply_all_case_fold(OnigCaseFoldType flag,
 207                     OnigApplyAllCaseFoldFunc f, void* arg,
 208                     OnigEncoding enc ARG_UNUSED)
 209 {
 210   return onigenc_apply_all_case_fold_with_map(
 211              numberof(CaseFoldMap), CaseFoldMap, 1,
 212              flag, f, arg);
 213 }
 214
 215 static int
 216 get_case_fold_codes_by_str(OnigCaseFoldType flag,
 217                            const OnigUChar* p, const OnigUChar* end,
 218                            OnigCaseFoldCodeItem items[],
 219                            OnigEncoding enc ARG_UNUSED)
 220 {
 221   return onigenc_get_case_fold_codes_by_str_with_map(
 222              numberof(CaseFoldMap), CaseFoldMap, 1,
 223              flag, p, end, items);
 224 }
 225
 226 static int
 227 case_map(OnigCaseFoldType* flagP, const OnigUChar** pp,
 228          const OnigUChar* end, OnigUChar* to, OnigUChar* to_end,
 229          const struct OnigEncodingTypeST* enc)
 230 {
 231   OnigCodePoint code;
 232   OnigUChar *to_start = to;
 233   OnigCaseFoldType flags = *flagP;
 234
 235   while (*pp < end && to < to_end) {
 236     code = *(*pp)++;
 237     if (code == SHARP_s) {
 238       if (flags & ONIGENC_CASE_UPCASE) {
 239         flags |= ONIGENC_CASE_MODIFIED;
 240         *to++ = 'S';
 241         code = (flags & ONIGENC_CASE_TITLECASE) ? 's' : 'S';
 242       }
 243       else if (flags & ONIGENC_CASE_FOLD) {
 244         flags |= ONIGENC_CASE_MODIFIED;
 245         *to++ = 's';
 246         code = 's';
 247       }
 248     }
 249     else if ((EncISO_8859_4_CtypeTable[code] & BIT_CTYPE_UPPER)
 250              && (flags & (ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_FOLD))) {
 251       flags |= ONIGENC_CASE_MODIFIED;
 252       code = ENC_ISO_8859_4_TO_LOWER_CASE(code);
 253     }
 254     else if (code == 0xA2)
 255       ;
 256     else if ((EncISO_8859_4_CtypeTable[code]&BIT_CTYPE_LOWER)
 257              && (flags & ONIGENC_CASE_UPCASE)) {
 258       flags |= ONIGENC_CASE_MODIFIED;
 259       if (code >= 0xA0 && code <= 0xBF) {
 260         if (code == 0xBF)
 261           code -= 0x02;
 262         else
 263           code -= 0x10;
 264       }
 265       else
 266         code -= 0x20;
 267     }
 268     *to++ = code;
 269     if (flags & ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
 270       flags ^= (ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_TITLECASE);
 271   }
 272   *flagP = flags;
 273   return (int )(to - to_start);
 274 }
 275
 276 OnigEncodingDefine(iso_8859_4, ISO_8859_4) = {
 277   onigenc_single_byte_mbc_enc_len,
 278   "ISO-8859-4",  /* name */
 279   1,             /* max enc length */
 280   1,             /* min enc length */
 281   onigenc_is_mbc_newline_0x0a,
 282   onigenc_single_byte_mbc_to_code,
 283   onigenc_single_byte_code_to_mbclen,
 284   onigenc_single_byte_code_to_mbc,
 285   mbc_case_fold,
 286   apply_all_case_fold,
 287   get_case_fold_codes_by_str,
 288   onigenc_minimum_property_name_to_ctype,
 289   is_code_ctype,
 290   onigenc_not_support_get_ctype_code_range,
 291   onigenc_single_byte_left_adjust_char_head,
 292   onigenc_always_true_is_allowed_reverse_match,
 293   case_map,
 294   0,
 295   ONIGENC_FLAG_NONE,
 296 };
 297 ENC_ALIAS("ISO8859-4", "ISO-8859-4")