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DEFINITIONS
This source file includes following definitions.
- utf16le_code_to_mbclen
- utf16le_mbc_enc_len
- utf16le_is_mbc_newline
- utf16le_mbc_to_code
- utf16le_code_to_mbc
- utf16le_mbc_case_fold
- utf16le_is_mbc_ambiguous
- utf16le_left_adjust_char_head
- utf16le_get_case_fold_codes_by_str
/**********************************************************************
utf16_le.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
utf16le_code_to_mbclen(OnigCodePoint code)
{
return (code > 0xffff ? 4 : 2);
}
static int
utf16le_mbc_enc_len(const UChar* p)
{
return EncLen_UTF16[*(p+1)];
}
static int
utf16le_is_mbc_newline(const UChar* p, const UChar* end)
{
if (p + 1 < end) {
if (*p == 0x0a && *(p+1) == 0x00)
return 1;
#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
if ((
#ifndef USE_CRNL_AS_LINE_TERMINATOR
*p == 0x0d ||
#endif
*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)
{
OnigCodePoint code;
UChar c0 = *p;
UChar c1 = *(p+1);
if (UTF16_IS_SURROGATE_FIRST(c1)) {
code = ((((c1 - 0xd8) << 2) + ((c0 & 0xc0) >> 6) + 1) << 16)
+ ((((c0 & 0x3f) << 2) + (p[3] - 0xdc)) << 8)
+ p[2];
}
else {
code = c1 * 256 + p[0];
}
return code;
}
static int
utf16le_code_to_mbc(OnigCodePoint code, UChar *buf)
{
UChar* p = buf;
if (code > 0xffff) {
unsigned int plane, high;
plane = (code >> 16) - 1;
high = (code & 0xff00) >> 8;
*p++ = ((plane & 0x03) << 6) + (high >> 2);
*p++ = (plane >> 2) + 0xd8;
*p++ = (UChar )(code & 0xff);
*p = (high & 0x03) + 0xdc;
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)
{
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(ONIG_ENCODING_UTF16_LE, 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)
{
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[])
{
return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF16_LE,
flag, p, end, items);
}
OnigEncodingType OnigEncodingUTF16_LE = {
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
};