root/ext/mbstring/oniguruma/enc/iso8859_4.c

DEFINITIONS

1. mbc_case_fold
2. is_mbc_ambiguous
3. is_code_ctype
4. apply_all_case_fold
5. get_case_fold_codes_by_str

   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 
  32 #define ENC_ISO_8859_4_TO_LOWER_CASE(c) EncISO_8859_4_ToLowerCaseTable[c]
  33 #define ENC_IS_ISO_8859_4_CTYPE(code,ctype) \
  34   ((EncISO_8859_4_CtypeTable[code] & CTYPE_TO_BIT(ctype)) != 0)
  35 
  36 static const UChar EncISO_8859_4_ToLowerCaseTable[256] = {
  37   '\000', '\001', '\002', '\003', '\004', '\005', '\006', '\007',
  38   '\010', '\011', '\012', '\013', '\014', '\015', '\016', '\017',
  39   '\020', '\021', '\022', '\023', '\024', '\025', '\026', '\027',
  40   '\030', '\031', '\032', '\033', '\034', '\035', '\036', '\037',
  41   '\040', '\041', '\042', '\043', '\044', '\045', '\046', '\047',
  42   '\050', '\051', '\052', '\053', '\054', '\055', '\056', '\057',
  43   '\060', '\061', '\062', '\063', '\064', '\065', '\066', '\067',
  44   '\070', '\071', '\072', '\073', '\074', '\075', '\076', '\077',
  45   '\100', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  46   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  47   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  48   '\170', '\171', '\172', '\133', '\134', '\135', '\136', '\137',
  49   '\140', '\141', '\142', '\143', '\144', '\145', '\146', '\147',
  50   '\150', '\151', '\152', '\153', '\154', '\155', '\156', '\157',
  51   '\160', '\161', '\162', '\163', '\164', '\165', '\166', '\167',
  52   '\170', '\171', '\172', '\173', '\174', '\175', '\176', '\177',
  53   '\200', '\201', '\202', '\203', '\204', '\205', '\206', '\207',
  54   '\210', '\211', '\212', '\213', '\214', '\215', '\216', '\217',
  55   '\220', '\221', '\222', '\223', '\224', '\225', '\226', '\227',
  56   '\230', '\231', '\232', '\233', '\234', '\235', '\236', '\237',
  57   '\240', '\261', '\242', '\263', '\244', '\265', '\266', '\247',
  58   '\250', '\271', '\272', '\273', '\274', '\255', '\276', '\257',
  59   '\260', '\261', '\262', '\263', '\264', '\265', '\266', '\267',
  60   '\270', '\271', '\272', '\273', '\274', '\277', '\276', '\277',
  61   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  62   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  63   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\327',
  64   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\337',
  65   '\340', '\341', '\342', '\343', '\344', '\345', '\346', '\347',
  66   '\350', '\351', '\352', '\353', '\354', '\355', '\356', '\357',
  67   '\360', '\361', '\362', '\363', '\364', '\365', '\366', '\367',
  68   '\370', '\371', '\372', '\373', '\374', '\375', '\376', '\377'
  69 };
  70 
  71 static const unsigned short EncISO_8859_4_CtypeTable[256] = {
  72   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  73   0x4008, 0x420c, 0x4209, 0x4208, 0x4208, 0x4208, 0x4008, 0x4008,
  74   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  75   0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008, 0x4008,
  76   0x4284, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  77   0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  78   0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0, 0x78b0,
  79   0x78b0, 0x78b0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x41a0,
  80   0x41a0, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x7ca2, 0x74a2,
  81   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  82   0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2, 0x74a2,
  83   0x74a2, 0x74a2, 0x74a2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x51a0,
  84   0x41a0, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x78e2, 0x70e2,
  85   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  86   0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2, 0x70e2,
  87   0x70e2, 0x70e2, 0x70e2, 0x41a0, 0x41a0, 0x41a0, 0x41a0, 0x4008,
  88   0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008,
  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   0x0284, 0x34a2, 0x30e2, 0x34a2, 0x00a0, 0x34a2, 0x34a2, 0x00a0,
  93   0x00a0, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x01a0, 0x34a2, 0x00a0,
  94   0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x00a0, 0x30e2, 0x30e2, 0x00a0,
  95   0x00a0, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x34a2, 0x30e2, 0x30e2,
  96   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  97   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2,
  98   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x00a0,
  99   0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x34a2, 0x30e2,
 100   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
 101   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2,
 102   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0,
 103   0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x30e2, 0x00a0
 104 };
 105 
 106 static int
 107 mbc_case_fold(OnigCaseFoldType flag,
 108               const UChar** pp, const UChar* end ARG_UNUSED, UChar* lower)
 109 {
 110   const UChar* p = *pp;
 111 
 112   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
 113     *lower++ = 's';
 114     *lower   = 's';
 115     (*pp)++;
 116     return 2;
 117   }
 118 
 119   *lower = ENC_ISO_8859_4_TO_LOWER_CASE(*p);
 120   (*pp)++;
 121   return 1; /* return byte length of converted char to lower */
 122 }
 123 
 124 #if 0
 125 static int
 126 is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
 127 {
 128   int v;
 129   const UChar* p = *pp;
 130 
 131   if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
 132     (*pp)++;
 133     return TRUE;
 134   }
 135 
 136   (*pp)++;
 137   v = (EncISO_8859_4_CtypeTable[*p] & (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
 138   if ((v | BIT_CTYPE_LOWER) != 0) {
 139     if (*p == 0xa2)
 140       return FALSE;
 141     else
 142       return TRUE;
 143   }
 144 
 145   return (v != 0 ? TRUE : FALSE);
 146 }
 147 #endif
 148 
 149 static int
 150 is_code_ctype(OnigCodePoint code, unsigned int ctype)
 151 {
 152   if (code < 256)
 153     return ENC_IS_ISO_8859_4_CTYPE(code, ctype);
 154   else
 155     return FALSE;
 156 }
 157 
 158 static const OnigPairCaseFoldCodes CaseFoldMap[] = {
 159  { 0xa1, 0xb1 },
 160  { 0xa3, 0xb3 },
 161  { 0xa5, 0xb5 },
 162  { 0xa6, 0xb6 },
 163  { 0xa9, 0xb9 },
 164  { 0xaa, 0xba },
 165  { 0xab, 0xbb },
 166  { 0xac, 0xbc },
 167  { 0xae, 0xbe },
 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 {
 206   return onigenc_apply_all_case_fold_with_map(
 207              sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
 208              flag, f, arg);
 209 }
 210 
 211 static int
 212 get_case_fold_codes_by_str(OnigCaseFoldType flag,
 213     const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
 214 {
 215   return onigenc_get_case_fold_codes_by_str_with_map(
 216              sizeof(CaseFoldMap)/sizeof(OnigPairCaseFoldCodes), CaseFoldMap, 1,
 217              flag, p, end, items);
 218 }
 219 
 220 OnigEncodingType OnigEncodingISO_8859_4 = {
 221   onigenc_single_byte_mbc_enc_len,
 222   "ISO-8859-4",  /* name */
 223   1,             /* max enc length */
 224   1,             /* min enc length */
 225   onigenc_is_mbc_newline_0x0a,
 226   onigenc_single_byte_mbc_to_code,
 227   onigenc_single_byte_code_to_mbclen,
 228   onigenc_single_byte_code_to_mbc,
 229   mbc_case_fold,
 230   apply_all_case_fold,
 231   get_case_fold_codes_by_str,
 232   onigenc_minimum_property_name_to_ctype,
 233   is_code_ctype,
 234   onigenc_not_support_get_ctype_code_range,
 235   onigenc_single_byte_left_adjust_char_head,
 236   onigenc_always_true_is_allowed_reverse_match
 237 };