Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tree: 38d3b013b7
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 249 lines (223 sloc) 7.088 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248
/**********************************************************************
utf_16le.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2008 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#include "regenc.h"

#define UTF16_IS_SURROGATE_FIRST(c) (((c) & 0xfc) == 0xd8)
#define UTF16_IS_SURROGATE_SECOND(c) (((c) & 0xfc) == 0xdc)
#define UTF16_IS_SURROGATE(c) (((c) & 0xf8) == 0xd8)

static const int EncLen_UTF16[] = {
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2
};

static int
utf16le_mbc_enc_len(const UChar* p, const OnigUChar* e,
OnigEncoding enc ARG_UNUSED)
{
  int len = (int)(e - p);
  UChar byte;
  if (len < 2)
    return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(1);
  byte = p[1];
  if (!UTF16_IS_SURROGATE(byte)) {
    return ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(2);
  }
  if (UTF16_IS_SURROGATE_FIRST(byte)) {
    if (len < 4)
      return ONIGENC_CONSTRUCT_MBCLEN_NEEDMORE(4-len);
    if (UTF16_IS_SURROGATE_SECOND(p[3]))
      return ONIGENC_CONSTRUCT_MBCLEN_CHARFOUND(4);
  }
  return ONIGENC_CONSTRUCT_MBCLEN_INVALID();
}

static int
utf16le_is_mbc_newline(const UChar* p, const UChar* end,
OnigEncoding enc ARG_UNUSED)
{
  if (p + 1 < end) {
    if (*p == 0x0a && *(p+1) == 0x00)
      return 1;
#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
    if ((*p == 0x0b || *p == 0x0c || *p == 0x0d || *p == 0x85)
&& *(p+1) == 0x00)
      return 1;
    if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28))
      return 1;
#endif
  }
  return 0;
}

static OnigCodePoint
utf16le_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED,
OnigEncoding enc ARG_UNUSED)
{
  OnigCodePoint code;
  UChar c0 = *p;
  UChar c1 = *(p+1);

  if (UTF16_IS_SURROGATE_FIRST(c1)) {
    code = ((((c1 << 8) + c0) & 0x03ff) << 10)
         + (((p[3] << 8) + p[2]) & 0x03ff) + 0x10000;
  }
  else {
    code = c1 * 256 + p[0];
  }
  return code;
}

static int
utf16le_code_to_mbclen(OnigCodePoint code,
OnigEncoding enc ARG_UNUSED)
{
  return (code > 0xffff ? 4 : 2);
}

static int
utf16le_code_to_mbc(OnigCodePoint code, UChar *buf,
OnigEncoding enc ARG_UNUSED)
{
  UChar* p = buf;

  if (code > 0xffff) {
    unsigned int high = (code >> 10) + 0xD7C0;
    unsigned int low = (code & 0x3FF) + 0xDC00;
    *p++ = high & 0xFF;
    *p++ = (high >> 8) & 0xFF;
    *p++ = low & 0xFF;
    *p++ = (low >> 8) & 0xFF;
    return 4;
  }
  else {
    *p++ = (UChar )(code & 0xff);
    *p++ = (UChar )((code & 0xff00) >> 8);
    return 2;
  }
}

static int
utf16le_mbc_case_fold(OnigCaseFoldType flag,
const UChar** pp, const UChar* end, UChar* fold,
OnigEncoding enc)
{
  const UChar* p = *pp;

  if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0) {
#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
    if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
      if (*p == 0x49) {
*fold++ = 0x31;
*fold = 0x01;
(*pp) += 2;
return 2;
      }
    }
#endif

    *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
    *fold = 0;
    *pp += 2;
    return 2;
  }
  else
    return onigenc_unicode_mbc_case_fold(enc, flag, pp,
end, fold);
}

#if 0
static int
utf16le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp,
const UChar* end)
{
  const UChar* p = *pp;

  (*pp) += EncLen_UTF16[*(p+1)];

  if (*(p+1) == 0) {
    int c, v;

    if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) {
      return TRUE;
    }

    c = *p;
    v = ONIGENC_IS_UNICODE_ISO_8859_1_BIT_CTYPE(c,
                       (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER));
    if ((v | BIT_CTYPE_LOWER) != 0) {
      /* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */
      if (c >= 0xaa && c <= 0xba)
return FALSE;
      else
return TRUE;
    }
    return (v != 0 ? TRUE : FALSE);
  }

  return FALSE;
}
#endif

static UChar*
utf16le_left_adjust_char_head(const UChar* start, const UChar* s, const UChar* end,
OnigEncoding enc ARG_UNUSED)
{
  if (s <= start) return (UChar* )s;

  if ((s - start) % 2 == 1) {
    s--;
  }

  if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1)
    s -= 2;

  return (UChar* )s;
}

static int
utf16le_get_case_fold_codes_by_str(OnigCaseFoldType flag,
const OnigUChar* p, const OnigUChar* end,
OnigCaseFoldCodeItem items[],
OnigEncoding enc)
{
  return onigenc_unicode_get_case_fold_codes_by_str(enc,
flag, p, end, items);
}

OnigEncodingDefine(utf_16le, UTF_16LE) = {
  utf16le_mbc_enc_len,
  "UTF-16LE", /* name */
  4, /* max byte length */
  2, /* min byte length */
  utf16le_is_mbc_newline,
  utf16le_mbc_to_code,
  utf16le_code_to_mbclen,
  utf16le_code_to_mbc,
  utf16le_mbc_case_fold,
  onigenc_unicode_apply_all_case_fold,
  utf16le_get_case_fold_codes_by_str,
  onigenc_unicode_property_name_to_ctype,
  onigenc_unicode_is_code_ctype,
  onigenc_utf16_32_get_ctype_code_range,
  utf16le_left_adjust_char_head,
  onigenc_always_false_is_allowed_reverse_match,
  0,
  ONIGENC_FLAG_UNICODE,
};
Something went wrong with that request. Please try again.