enc/iso_8859_15.c

   1 /**********************************************************************
   2   iso8859_15.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_15_TO_LOWER_CASE(c) EncISO_8859_15_ToLowerCaseTable[c]
  34 #define ENC_IS_ISO_8859_15_CTYPE(code,ctype) \
  35   ((EncISO_8859_15_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  36
  37 static const UChar EncISO_8859_15_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', '\241', '\242', '\243', '\244', '\245', '\250', '\247',
  59   '\250', '\251', '\252', '\253', '\254', '\255', '\256', '\257',
  60   '\260', '\261', '\262', '\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', '\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_15_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, 0x01a0, 0x00a0, 0x00a0, 0x00a0, 0x00a0, 0x34a2, 0x00a0,
  94   0x30e2, 0x00a0, 0x30e2, 0x01a0, 0x00a0, 0x01a0, 0x00a0, 0x00a0,
  95   0x00a0, 0x00a0, 0x10a0, 0x10a0, 0x34a2, 0x30e2, 0x00a0, 0x01a0,
  96   0x30e2, 0x10a0, 0x30e2, 0x01a0, 0x34a2, 0x30e2, 0x34a2, 0x01a0,
  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, 0x30e2
 105 };
 106
 107 static int
 108 mbc_case_fold(OnigCaseFoldType flag,
 109                           const UChar** pp, const UChar* end ARG_UNUSED,
 110                           UChar* lower, 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_15_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,
 129                  const UChar** pp, const UChar* end)
 130 {
 131   int v;
 132   const UChar* p = *pp;
 133
 134   if (*p == SHARP_s && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
 135     (*pp)++;
 136     return TRUE;
 137   }
 138
 139   (*pp)++;
 140   v = (EncISO_8859_15_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
 141   if ((v | BIT_CTYPE_LOWER) != 0) {
 142     /* 0xdf etc.. are lower case letter, but can't convert. */
 143     if (*p == 0xaa || *p == 0xb5 || *p == 0xba)
 144       return FALSE;
 145     else
 146       return TRUE;
 147   }
 148
 149   return (v != 0 ? TRUE : FALSE);
 150 }
 151 #endif
 152
 153 static int
 154 is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc ARG_UNUSED)
 155 {
 156   if (code < 256)
 157     return ENC_IS_ISO_8859_15_CTYPE(code, ctype);
 158   else
 159     return FALSE;
 160 }
 161
 162 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 163  { 0xa6, 0xa8 },
 164
 165  { 0xb4, 0xb8 },
 166  { 0xbc, 0xbd },
 167  { 0xbe, 0xff },
 168
 169  { 0xc0, 0xe0 },
 170  { 0xc1, 0xe1 },
 171  { 0xc2, 0xe2 },
 172  { 0xc3, 0xe3 },
 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  { 0xd0, 0xf0 },
 187  { 0xd1, 0xf1 },
 188  { 0xd2, 0xf2 },
 189  { 0xd3, 0xf3 },
 190  { 0xd4, 0xf4 },
 191  { 0xd5, 0xf5 },
 192  { 0xd6, 0xf6 },
 193  { 0xd8, 0xf8 },
 194  { 0xd9, 0xf9 },
 195  { 0xda, 0xfa },
 196  { 0xdb, 0xfb },
 197  { 0xdc, 0xfc },
 198  { 0xdd, 0xfd },
 199  { 0xde, 0xfe }
 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 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 (code == 0xAA || code == 0xBA || code == 0xB5)
 247       ;
 248     else if ((EncISO_8859_15_CtypeTable[code] & BIT_CTYPE_UPPER)
 249              && (flags & (ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_FOLD))) {
 250       flags |= ONIGENC_CASE_MODIFIED;
 251       code = ENC_ISO_8859_15_TO_LOWER_CASE(code);
 252     }
 253     else if ((EncISO_8859_15_CtypeTable[code] & BIT_CTYPE_LOWER)
 254              && (flags & ONIGENC_CASE_UPCASE)) {
 255       flags |= ONIGENC_CASE_MODIFIED;
 256       if (code == 0xA8)
 257         code -= 2;
 258       else if (code == 0xB8)
 259         code -= 4;
 260       else if (code == 0xBD)
 261         code -= 1;
 262       else if (code == 0xFF)
 263         code -= 0x41;
 264       else
 265         code -= 0x20;
 266     }
 267     *to++ = code;
 268     if (flags & ONIGENC_CASE_TITLECASE)  /* switch from titlecase to lowercase for capitalize */
 269       flags ^= (ONIGENC_CASE_UPCASE | ONIGENC_CASE_DOWNCASE | ONIGENC_CASE_TITLECASE);
 270   }
 271   *flagP = flags;
 272   return (int )(to - to_start);
 273 }
 274
 275 OnigEncodingDefine(iso_8859_15, ISO_8859_15) = {
 276   onigenc_single_byte_mbc_enc_len,
 277   "ISO-8859-15",  /* name */
 278   1,             /* max enc length */
 279   1,             /* min enc length */
 280   onigenc_is_mbc_newline_0x0a,
 281   onigenc_single_byte_mbc_to_code,
 282   onigenc_single_byte_code_to_mbclen,
 283   onigenc_single_byte_code_to_mbc,
 284   mbc_case_fold,
 285   apply_all_case_fold,
 286   get_case_fold_codes_by_str,
 287   onigenc_minimum_property_name_to_ctype,
 288   is_code_ctype,
 289   onigenc_not_support_get_ctype_code_range,
 290   onigenc_single_byte_left_adjust_char_head,
 291   onigenc_always_true_is_allowed_reverse_match,
 292   case_map,
 293   0,
 294   ONIGENC_FLAG_NONE,
 295 };
 296 ENC_ALIAS("ISO8859-15", "ISO-8859-15")