utf_32le.c
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/**********************************************************************
utf_32le.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2007 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 int
utf32le_mbc_enc_len(const UChar* p ARG_UNUSED, const OnigUChar* e ARG_UNUSED,
OnigEncoding enc ARG_UNUSED)
{
return 4;
}
static int
utf32le_is_mbc_newline(const UChar* p, const UChar* end,
OnigEncoding enc ARG_UNUSED)
{
if (p + 3 < end) {
if (*p == 0x0a && *(p+1) == 0 && *(p+2) == 0 && *(p+3) == 0)
return 1;
#ifdef USE_UNICODE_ALL_LINE_TERMINATORS
if ((
#ifndef USE_CRNL_AS_LINE_TERMINATOR
*p == 0x0d ||
#endif
*p == 0x85)
&& *(p+1) == 0x00 && (p+2) == 0x00 && *(p+3) == 0x00)
return 1;
if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28)
&& *(p+2) == 0x00 && *(p+3) == 0x00)
return 1;
#endif
}
return 0;
}
static OnigCodePoint
utf32le_mbc_to_code(const UChar* p, const UChar* end ARG_UNUSED,
OnigEncoding enc ARG_UNUSED)
{
return (OnigCodePoint )(((p[3] * 256 + p[2]) * 256 + p[1]) * 256 + p[0]);
}
static int
utf32le_code_to_mbclen(OnigCodePoint code ARG_UNUSED,
OnigEncoding enc ARG_UNUSED)
{
return 4;
}
static int
utf32le_code_to_mbc(OnigCodePoint code, UChar *buf,
OnigEncoding enc ARG_UNUSED)
{
UChar* p = buf;
*p++ = (UChar ) (code & 0xff);
*p++ = (UChar )((code & 0xff00) >> 8);
*p++ = (UChar )((code & 0xff0000) >>16);
*p++ = (UChar )((code & 0xff000000) >>24);
return 4;
}
static int
utf32le_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 && *(p+2) == 0 && *(p+3) == 0) {
#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) {
if (*p == 0x49) {
*fold++ = 0x31;
*fold++ = 0x01;
}
}
else {
#endif
*fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
*fold++ = 0;
#ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI
}
#endif
*fold++ = 0;
*fold = 0;
*pp += 4;
return 4;
}
else
return onigenc_unicode_mbc_case_fold(enc, flag, pp,
end, fold);
}
#if 0
static int
utf32le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end)
{
const UChar* p = *pp;
(*pp) += 4;
if (*(p+1) == 0 && *(p+2) == 0 && *(p+3) == 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*
utf32le_left_adjust_char_head(const UChar* start, const UChar* s, const UChar* end,
OnigEncoding enc ARG_UNUSED)
{
ptrdiff_t rem;
if (s <= start) return (UChar* )s;
rem = (s - start) % 4;
return (UChar* )(s - rem);
}
static int
utf32le_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_32le, UTF_32LE) = {
utf32le_mbc_enc_len,
"UTF-32LE", /* name */
4, /* max byte length */
4, /* min byte length */
utf32le_is_mbc_newline,
utf32le_mbc_to_code,
utf32le_code_to_mbclen,
utf32le_code_to_mbc,
utf32le_mbc_case_fold,
onigenc_unicode_apply_all_case_fold,
utf32le_get_case_fold_codes_by_str,
onigenc_unicode_property_name_to_ctype,
onigenc_unicode_is_code_ctype,
onigenc_utf16_32_get_ctype_code_range,
utf32le_left_adjust_char_head,
onigenc_always_false_is_allowed_reverse_match
};
ENC_ALIAS("UCS-4LE", "UTF-32LE")