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/**********************************************************************
euc_tw.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2018 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_EUCTW[] = {
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
};
static int
euctw_mbc_enc_len(const UChar* p)
{
return EncLen_EUCTW[*p];
}
static int
is_valid_mbc_string(const UChar* p, const UChar* end)
{
while (p < end) {
if (*p < 0x80) {
p++;
}
else if (*p < 0xa1) {
if (*p == 0x8e) {
p++;
if (p >= end) return FALSE;
if (*p < 0xa1 || *p > 0xb0) return FALSE;
p++;
if (p >= end) return FALSE;
if (*p < 0xa1 || *p == 0xff)
return FALSE;
p++;
if (p >= end) return FALSE;
if (*p < 0xa1 || *p == 0xff)
return FALSE;
p++;
}
else
return FALSE;
}
else if (*p < 0xff) {
p++;
if (p >= end) return FALSE;
if (*p < 0xa1 || *p == 0xff)
return FALSE;
p++;
}
else
return FALSE;
}
return TRUE;
}
static OnigCodePoint
euctw_mbc_to_code(const UChar* p, const UChar* end)
{
return onigenc_mbn_mbc_to_code(ONIG_ENCODING_EUC_TW, p, end);
}
static int
euctw_code_to_mbc(OnigCodePoint code, UChar *buf)
{
return onigenc_mb4_code_to_mbc(ONIG_ENCODING_EUC_TW, code, buf);
}
static int
euctw_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end,
UChar* lower)
{
return onigenc_mbn_mbc_case_fold(ONIG_ENCODING_EUC_TW, flag,
pp, end, lower);
}
static int
euctw_is_code_ctype(OnigCodePoint code, unsigned int ctype)
{
return onigenc_mb4_is_code_ctype(ONIG_ENCODING_EUC_TW, code, ctype);
}
#define euctw_islead(c) ((UChar )((c) - 0xa1) > 0xfe - 0xa1)
static UChar*
euctw_left_adjust_char_head(const UChar* start, const UChar* s)
{
/* Assumed in this encoding,
mb-trail bytes don't mix with single bytes.
*/
const UChar *p;
int len;
if (s <= start) return (UChar* )s;
p = s;
while (!euctw_islead(*p) && p > start) p--;
len = enclen(ONIG_ENCODING_EUC_TW, p);
if (p + len > s) return (UChar* )p;
p += len;
return (UChar* )(p + ((s - p) & ~1));
}
static int
euctw_is_allowed_reverse_match(const UChar* s, const UChar* end ARG_UNUSED)
{
const UChar c = *s;
if (c <= 0x7e) return TRUE;
else return FALSE;
}
OnigEncodingType OnigEncodingEUC_TW = {
euctw_mbc_enc_len,
"EUC-TW", /* name */
4, /* max enc length */
1, /* min enc length */
onigenc_is_mbc_newline_0x0a,
euctw_mbc_to_code,
onigenc_mb4_code_to_mbclen,
euctw_code_to_mbc,
euctw_mbc_case_fold,
onigenc_ascii_apply_all_case_fold,
onigenc_ascii_get_case_fold_codes_by_str,
onigenc_minimum_property_name_to_ctype,
euctw_is_code_ctype,
onigenc_not_support_get_ctype_code_range,
euctw_left_adjust_char_head,
euctw_is_allowed_reverse_match,
NULL, /* init */
NULL, /* is_initialized */
is_valid_mbc_string,
ENC_FLAG_ASCII_COMPATIBLE|ENC_FLAG_SKIP_OFFSET_1,
0, 0
};
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