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145 lines
4.9 KiB
C
145 lines
4.9 KiB
C
/**********************************************************************
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euc_tw.c - Oniguruma (regular expression library)
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**********************************************************************/
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/*-
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* Copyright (c) 2002-2005 K.Kosako <sndgk393 AT ybb DOT ne DOT jp>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "regenc.h"
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static int EncLen_EUCTW[] = {
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1
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};
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static int
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euctw_mbc_enc_len(const UChar* p)
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{
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return EncLen_EUCTW[*p];
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}
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static OnigCodePoint
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euctw_mbc_to_code(const UChar* p, const UChar* end)
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{
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return onigenc_mbn_mbc_to_code(ONIG_ENCODING_EUC_TW, p, end);
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}
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static int
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euctw_code_to_mbc(OnigCodePoint code, UChar *buf)
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{
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return onigenc_mb4_code_to_mbc(ONIG_ENCODING_EUC_TW, code, buf);
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}
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static int
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euctw_mbc_to_normalize(OnigAmbigType flag, const UChar** pp, const UChar* end,
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UChar* lower)
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{
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return onigenc_mbn_mbc_to_normalize(ONIG_ENCODING_EUC_TW, flag,
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pp, end, lower);
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}
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static int
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euctw_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
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{
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return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_EUC_TW, flag, pp, end);
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}
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static int
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euctw_is_code_ctype(OnigCodePoint code, unsigned int ctype)
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{
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return onigenc_mb4_is_code_ctype(ONIG_ENCODING_EUC_TW, code, ctype);
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}
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#define euctw_islead(c) (((c) < 0xa1 && (c) != 0x8e) || (c) == 0xff)
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static UChar*
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euctw_left_adjust_char_head(const UChar* start, const UChar* s)
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{
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/* Assumed in this encoding,
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mb-trail bytes don't mix with single bytes.
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*/
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const UChar *p;
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int len;
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if (s <= start) return (UChar* )s;
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p = s;
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while (!euctw_islead(*p) && p > start) p--;
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len = enc_len(ONIG_ENCODING_EUC_TW, p);
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if (p + len > s) return (UChar* )p;
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p += len;
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return (UChar* )(p + ((s - p) & ~1));
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}
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static int
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euctw_is_allowed_reverse_match(const UChar* s, const UChar* end)
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{
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const UChar c = *s;
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if (c <= 0x7e) return TRUE;
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else return FALSE;
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}
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OnigEncodingType OnigEncodingEUC_TW = {
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euctw_mbc_enc_len,
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"EUC-TW", /* name */
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4, /* max enc length */
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1, /* min enc length */
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ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
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{
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(OnigCodePoint )'\\' /* esc */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
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, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
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},
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onigenc_is_mbc_newline_0x0a,
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euctw_mbc_to_code,
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onigenc_mb4_code_to_mbclen,
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euctw_code_to_mbc,
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euctw_mbc_to_normalize,
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euctw_is_mbc_ambiguous,
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onigenc_ascii_get_all_pair_ambig_codes,
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onigenc_nothing_get_all_comp_ambig_codes,
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euctw_is_code_ctype,
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onigenc_not_support_get_ctype_code_range,
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euctw_left_adjust_char_head,
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euctw_is_allowed_reverse_match
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};
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