enc/iso_8859_16.c

   1 /**********************************************************************
   2   iso8859_16.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_16_TO_LOWER_CASE(c) EncISO_8859_16_ToLowerCaseTable[c]
  34 #define ENC_IS_ISO_8859_16_CTYPE(code,ctype) \
  35   ((EncISO_8859_16_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  36
  37 static const UChar EncISO_8859_16_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', '\242', '\242', '\263', '\245', '\245', '\250', '\247',
  59   '\250', '\251', '\272', '\253', '\256', '\255', '\256', '\277',
  60   '\260', '\261', '\271', '\263', '\270', '\265', '\266', '\267',
  61   '\270', '\271', '\272', '\273', '\275', '\275', '\377', '\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', '\367',
  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_16_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, 0x01a0, 0x34a2, 0x00a0,
  94   0x30e2, 0x00a0, 0x34a2, 0x01a0, 0x34a2, 0x01a0, 0x30e2, 0x34a2,
  95   0x00a0, 0x00a0, 0x34a2, 0x30e2, 0x34a2, 0x01a0, 0x00a0, 0x01a0,
  96   0x30e2, 0x30e2, 0x30e2, 0x01a0, 0x34a2, 0x30e2, 0x34a2, 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, 0x34a2,
 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, 0x30e2,
 104   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2
 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_16_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_16_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 int
 149 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
 150 {
 151   if (code < 256)
 152     return ENC_IS_ISO_8859_16_CTYPE(code, ctype);
 153   else
 154     return FALSE;
 155 }
 156
 157 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 158  { 0xa1, 0xa2 },
 159  { 0xa3, 0xb3 },
 160  { 0xa6, 0xa8 },
 161  { 0xaa, 0xba },
 162  { 0xac, 0xae },
 163  { 0xaf, 0xbf },
 164
 165  { 0xb2, 0xb9 },
 166  { 0xb4, 0xb8 },
 167  { 0xbc, 0xbd },
 168  { 0xbe, 0xff },
 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  { 0xd7, 0xf7 },
 195  { 0xd8, 0xf8 },
 196  { 0xd9, 0xf9 },
 197  { 0xda, 0xfa },
 198  { 0xdb, 0xfb },
 199  { 0xdc, 0xfc },
 200  { 0xdd, 0xfd },
 201  { 0xde, 0xfe }
 202 };
 203
 204 static int
 205 apply_all_case_fold(OnigCaseFoldType flag,
 206                                 OnigApplyAllCaseFoldFunc f, void* arg,
 207                                 OnigEncoding enc ARG_UNUSED)
 208 {
 209   return onigenc_apply_all_case_fold_with_map(
 210              numberof(CaseFoldMap), CaseFoldMap, 1,
 211              flag, f, arg);
 212 }
 213
 214 static int
 215 get_case_fold_codes_by_str(OnigCaseFoldType flag,
 216                            const OnigUChar* p, const OnigUChar* end,
 217                            OnigCaseFoldCodeItem items[],
 218                            OnigEncoding enc ARG_UNUSED)
 219 {
 220   return onigenc_get_case_fold_codes_by_str_with_map(
 221              numberof(CaseFoldMap), CaseFoldMap, 1,
 222              flag, p, end, items);
 223 }
 224
 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 ((EncISO_8859_16_CtypeTable[code] & BIT_CTYPE_UPPER)
 249              && (flags & (ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_FOLD))) {
 250       flags |= ONIGENC_CASE_MODIFIED;
 251       code = ENC_ISO_8859_16_TO_LOWER_CASE(code);
 252     }
 253     else if ((EncISO_8859_16_CtypeTable[code] & BIT_CTYPE_LOWER)
 254              && (flags&ONIGENC_CASE_UPCASE)) {
 255       flags |= ONIGENC_CASE_MODIFIED;
 256       if (code == 0xA2 || code == 0xBD)
 257         code--;
 258       else if (code == 0xB3 || code == 0xBA || code == 0xBF)
 259         code -= 0x10;
 260       else if (code == 0xA8 || code == 0xAE)
 261         code -= 0x02;
 262       else if (code == 0xB9)
 263         code -= 0x07;
 264       else if (code == 0xB8)
 265         code -= 0x04;
 266       else if (code == 0xFF)
 267         code -= 0x41;
 268       else
 269         code -= 0x20;
 270     }
 271     *to++ = code;
 272     if (flags & ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
 273       flags ^= (ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_TITLECASE);
 274   }
 275   *flagP = flags;
 276   return (int )(to - to_start);
 277 }
 278
 279 OnigEncodingDefine(iso_8859_16, ISO_8859_16) = {
 280   onigenc_single_byte_mbc_enc_len,
 281   "ISO-8859-16",  /* name */
 282   1,             /* max enc length */
 283   1,             /* min enc length */
 284   onigenc_is_mbc_newline_0x0a,
 285   onigenc_single_byte_mbc_to_code,
 286   onigenc_single_byte_code_to_mbclen,
 287   onigenc_single_byte_code_to_mbc,
 288   mbc_case_fold,
 289   apply_all_case_fold,
 290   get_case_fold_codes_by_str,
 291   onigenc_minimum_property_name_to_ctype,
 292   is_code_ctype,
 293   onigenc_not_support_get_ctype_code_range,
 294   onigenc_single_byte_left_adjust_char_head,
 295   onigenc_always_true_is_allowed_reverse_match,
 296   case_map,
 297   0,
 298   ONIGENC_FLAG_NONE,
 299 };
 300 ENC_ALIAS("ISO8859-16", "ISO-8859-16")