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File Name : utf16_be.c

/**********************************************************************
  utf16_be.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"

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
utf16be_mbc_enc_len(const UChar* p)
{
  return EncLen_UTF16[*p];
}

static int
utf16be_is_mbc_newline(const UChar* p, const UChar* end)
{
  if (p + 1 < end) {
    if (*(p+1) == 0x0a && *p == 0x00)
      return 1;
#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
    if ((
#ifndef USE_CRNL_AS_LINE_TERMINATOR
	 *(p+1) == 0x0d ||
#endif
	 *(p+1) == 0x85) && *p == 0x00)
      return 1;
    if (*p == 0x20 && (*(p+1) == 0x29 || *(p+1) == 0x28))
      return 1;
#endif
  }
  return 0;
}

static OnigCodePoint
utf16be_mbc_to_code(const UChar* p, const UChar* end)
{
  OnigCodePoint code;

if (UTF16_IS_SURROGATE_FIRST(*p)) {
    if (end - p < 4) return 0;
    code = ((((p[0] - 0xd8) << 2) + ((p[1] & 0xc0) >> 6) + 1) << 16)
         + ((((p[1] & 0x3f) << 2) + (p[2] - 0xdc)) << 8)
         + p[3];
  }
  else {
    if (end - p < 2) return 0;
    code = p[0] * 256 + p[1];
  }
  return code;
}

static int
utf16be_code_to_mbclen(OnigCodePoint code)
{
  return (code > 0xffff ? 4 : 2);
}

static int
utf16be_code_to_mbc(OnigCodePoint code, UChar *buf)
{
  UChar* p = buf;

if (code > 0xffff) {
    unsigned int plane, high;

plane = (code >> 16) - 1;
    *p++ = (plane >> 2) + 0xd8;
    high = (code & 0xff00) >> 8;
    *p++ = ((plane & 0x03) << 6) + (high >> 2);
    *p++ = (high & 0x03) + 0xdc;
    *p   = (UChar )(code & 0xff);
    return 4;
  }
  else {
    *p++ = (UChar )((code & 0xff00) >> 8);
    *p++ = (UChar )(code & 0xff);
    return 2;
  }
}

static int
utf16be_mbc_case_fold(OnigCaseFoldType flag,
		      const UChar** pp, const UChar* end, UChar* fold)
{
  const UChar* p = *pp;

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

*fold++ = 0;
    *fold   = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
    *pp += 2;
    return 2;
  }
  else
    return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF16_BE, flag,
					 pp, end, fold);
}

#if 0
static int
utf16be_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
{
  const UChar* p = *pp;

(*pp) += EncLen_UTF16[*p];

if (*p == 0) {
    int c, v;

p++;
    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*
utf16be_left_adjust_char_head(const UChar* start, const UChar* s)
{
  if (s <= start) return (UChar* )s;

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

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

return (UChar* )s;
}

static int
utf16be_get_case_fold_codes_by_str(OnigCaseFoldType flag,
    const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[])
{
  return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF16_BE,
						    flag, p, end, items);
}

OnigEncodingType OnigEncodingUTF16_BE = {
  utf16be_mbc_enc_len,
  "UTF-16BE",   /* name */
  4,            /* max byte length */
  2,            /* min byte length */
  utf16be_is_mbc_newline,
  utf16be_mbc_to_code,
  utf16be_code_to_mbclen,
  utf16be_code_to_mbc,
  utf16be_mbc_case_fold,
  onigenc_unicode_apply_all_case_fold,
  utf16be_get_case_fold_codes_by_str,
  onigenc_unicode_property_name_to_ctype,
  onigenc_unicode_is_code_ctype,
  onigenc_utf16_32_get_ctype_code_range,
  utf16be_left_adjust_char_head,
  onigenc_always_false_is_allowed_reverse_match
};

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	0755	2023-12-06 01:08:28
..	dir	-	root/root	0755	2023-12-06 01:08:28
ascii.c	text/x-c	2.35 KB	root/root	0644	2019-01-09 09:54:13
big5.c	text/x-c	5.31 KB	root/root	0644	2019-01-09 09:54:13
euc_jp.c	text/x-c	7.04 KB	root/root	0644	2019-01-09 09:54:13
euc_kr.c	text/x-c	5.05 KB	root/root	0644	2019-01-09 09:54:13
euc_tw.c	text/x-c	4.29 KB	root/root	0644	2019-01-09 09:54:13
iso8859_1.c	text/x-c	8.55 KB	root/root	0644	2019-01-09 09:54:13
iso8859_10.c	text/x-c	8.85 KB	root/root	0644	2019-01-09 09:54:13
iso8859_11.c	text/x-c	4.59 KB	root/root	0644	2019-01-09 09:54:13
iso8859_13.c	text/x-c	8.73 KB	root/root	0644	2019-01-09 09:54:13
iso8859_14.c	text/x-c	8.9 KB	root/root	0644	2019-01-09 09:54:13
iso8859_15.c	text/x-c	8.88 KB	root/root	0644	2019-01-09 09:54:13
iso8859_16.c	text/x-c	8.85 KB	root/root	0644	2019-01-09 09:54:13
iso8859_2.c	text/x-c	8.82 KB	root/root	0644	2019-01-09 09:54:13
iso8859_3.c	text/x-c	8.81 KB	root/root	0644	2019-01-09 09:54:13
iso8859_4.c	text/x-c	8.86 KB	root/root	0644	2019-01-09 09:54:13
iso8859_5.c	text/x-c	8.58 KB	root/root	0644	2019-01-09 09:54:13
iso8859_6.c	text/x-c	4.58 KB	root/root	0644	2019-01-09 09:54:13
iso8859_7.c	text/x-c	8.5 KB	root/root	0644	2019-01-09 09:54:13
iso8859_8.c	text/x-c	4.58 KB	root/root	0644	2019-01-09 09:54:13
iso8859_9.c	text/x-c	8.76 KB	root/root	0644	2019-01-09 09:54:13
koi8.c	text/x-c	9.05 KB	root/root	0644	2019-01-09 09:54:13
koi8_r.c	text/x-c	8.42 KB	root/root	0644	2019-01-09 09:54:13
sjis.c	text/x-c	8.07 KB	root/root	0644	2019-01-09 09:54:13
unicode.c	text/x-c	232.57 KB	root/root	0644	2019-01-09 09:54:13
utf16_be.c	text/x-c	6.11 KB	root/root	0644	2019-01-09 09:54:13
utf16_le.c	text/x-c	6.13 KB	root/root	0644	2019-01-09 09:54:13
utf32_be.c	text/x-c	4.99 KB	root/root	0644	2019-01-09 09:54:13
utf32_le.c	text/x-c	5.02 KB	root/root	0644	2019-01-09 09:54:13
utf8.c	text/x-c	8.1 KB	root/root	0644	2019-01-09 09:54:13

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