ext/mbstring/oniguruma/enc/big5.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
big5_mbc_enc_len
big5_mbc_to_code
big5_code_to_mbc
big5_mbc_case_fold
big5_is_mbc_ambiguous
big5_is_code_ctype
big5_left_adjust_char_head
big5_is_allowed_reverse_match
   1 /**********************************************************************
   2   big5.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 static const int EncLen_BIG5[] = {
  33   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  34   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  35   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  36   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  37   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  38   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  39   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  40   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  41   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  42   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  43   1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  44   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  45   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  46   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  47   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  48   2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
  49 };
  50 
  51 static int
  52 big5_mbc_enc_len(const UChar* p)
  53 {
  54   return EncLen_BIG5[*p];
  55 }
  56 
  57 static OnigCodePoint
  58 big5_mbc_to_code(const UChar* p, const UChar* end)
  59 {
  60   return onigenc_mbn_mbc_to_code(ONIG_ENCODING_BIG5, p, end);
  61 }
  62 
  63 static int
  64 big5_code_to_mbc(OnigCodePoint code, UChar *buf)
  65 {
  66   return onigenc_mb2_code_to_mbc(ONIG_ENCODING_BIG5, code, buf);
  67 }
  68 
  69 static int
  70 big5_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
  71                    UChar* lower)
  72 {
  73   return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_BIG5, flag,
  74                                    pp, end, lower);
  75 }
  76 
  77 #if 0
  78 static int
  79 big5_is_mbc_ambiguous(OnigCaseFoldType flag,
  80                       const UChar** pp, const UChar* end)
  81 {
  82   return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_BIG5, flag, pp, end);
  83 }
  84 #endif
  85 
  86 static int
  87 big5_is_code_ctype(OnigCodePoint code, unsigned int ctype)
  88 {
  89   return onigenc_mb2_is_code_ctype(ONIG_ENCODING_BIG5, code, ctype);
  90 }
  91 
  92 static const char BIG5_CAN_BE_TRAIL_TABLE[256] = {
  93   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  94   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  95   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  96   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  97   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  98   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  99   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 100   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
 101   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 102   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 103   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 104   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 105   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 106   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 107   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
 108   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0
 109 };
 110 
 111 #define BIG5_ISMB_FIRST(byte)  (EncLen_BIG5[byte] > 1)
 112 #define BIG5_ISMB_TRAIL(byte)  BIG5_CAN_BE_TRAIL_TABLE[(byte)]
 113 
 114 static UChar*
 115 big5_left_adjust_char_head(const UChar* start, const UChar* s)
 116 {
 117   const UChar *p;
 118   int len;
 119 
 120   if (s <= start) return (UChar* )s;
 121   p = s;
 122 
 123   if (BIG5_ISMB_TRAIL(*p)) {
 124     while (p > start) {
 125       if (! BIG5_ISMB_FIRST(*--p)) {
 126         p++;
 127         break;
 128       }
 129     } 
 130   }
 131   len = enclen(ONIG_ENCODING_BIG5, p);
 132   if (p + len > s) return (UChar* )p;
 133   p += len;
 134   return (UChar* )(p + ((s - p) & ~1));
 135 }
 136 
 137 static int
 138 big5_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
 139 {
 140   const UChar c = *s;
 141 
 142   return (BIG5_ISMB_TRAIL(c) ? FALSE : TRUE);
 143 }
 144 
 145 OnigEncodingType OnigEncodingBIG5 = {
 146   big5_mbc_enc_len,
 147   "Big5",     /* name */
 148   2,          /* max enc length */
 149   1,          /* min enc length */
 150   onigenc_is_mbc_newline_0x0a,
 151   big5_mbc_to_code,
 152   onigenc_mb2_code_to_mbclen,
 153   big5_code_to_mbc,
 154   big5_mbc_case_fold,
 155   onigenc_ascii_apply_all_case_fold,
 156   onigenc_ascii_get_case_fold_codes_by_str,
 157   onigenc_minimum_property_name_to_ctype,
 158   big5_is_code_ctype,
 159   onigenc_not_support_get_ctype_code_range,
 160   big5_left_adjust_char_head,
 161   big5_is_allowed_reverse_match
 162 };
/* [<][>][^][v][top][bottom][index][help] */
root/ext/mbstring/oniguruma/enc/big5.c

DEFINITIONS
