зеркало из https://github.com/github/ruby.git
233 строки
6.4 KiB
C
233 строки
6.4 KiB
C
/**********************************************************************
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euc_jp.c - Oniguruma (regular expression library)
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**********************************************************************/
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/*-
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* Copyright (c) 2002-2004 K.Kosako <kosako AT sofnec DOT co 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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#define eucjp_islead(c) ((UChar )((c) - 0xa1) > 0xfe - 0xa1)
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static int EncLen_EUCJP[] = {
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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, 2, 3,
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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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eucjp_mbc_enc_len(UChar* p)
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{
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return EncLen_EUCJP[*p];
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}
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static OnigCodePoint
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eucjp_mbc_to_code(UChar* p, UChar* end)
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{
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int c, i, len;
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OnigCodePoint n;
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len = enc_len(ONIG_ENCODING_EUC_JP, p);
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n = (OnigCodePoint )*p++;
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if (len == 1) return n;
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for (i = 1; i < len; i++) {
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if (p >= end) break;
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c = *p++;
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n <<= 8; n += c;
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}
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return n;
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}
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static int
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eucjp_code_to_mbclen(OnigCodePoint code)
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{
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if (ONIGENC_IS_CODE_ASCII(code)) return 1;
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else if ((code & 0xff0000) != 0) return 3;
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else if ((code & 0xff00) != 0) return 2;
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else return 0;
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}
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#if 0
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static int
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eucjp_code_to_mbc_first(OnigCodePoint code)
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{
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int first;
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if ((code & 0xff0000) != 0) {
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first = (code >> 16) & 0xff;
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}
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else if ((code & 0xff00) != 0) {
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first = (code >> 8) & 0xff;
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}
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else {
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return (int )code;
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}
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return first;
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}
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#endif
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static int
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eucjp_code_to_mbc(OnigCodePoint code, UChar *buf)
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{
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UChar *p = buf;
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if ((code & 0xff0000) != 0) *p++ = (UChar )(((code >> 16) & 0xff));
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if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
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*p++ = (UChar )(code & 0xff);
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#if 1
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if (enc_len(ONIG_ENCODING_EUC_JP, buf) != (p - buf))
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return ONIGENCERR_INVALID_WIDE_CHAR_VALUE;
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#endif
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return p - buf;
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}
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static int
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eucjp_mbc_to_normalize(OnigAmbigType flag, UChar** pp, UChar* end,
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UChar* lower)
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{
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int len;
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UChar* p = *pp;
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if (ONIGENC_IS_MBC_ASCII(p)) {
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if ((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0) {
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*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
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}
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else {
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*lower = *p;
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}
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(*pp)++;
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return 1;
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}
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else {
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len = enc_len(ONIG_ENCODING_EUC_JP, p);
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if (lower != p) {
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int i;
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for (i = 0; i < len; i++) {
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*lower++ = *p++;
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}
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}
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(*pp) += len;
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return len; /* return byte length of converted char to lower */
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}
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}
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static int
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eucjp_is_mbc_ambiguous(OnigAmbigType flag, UChar** pp, UChar* end)
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{
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return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_EUC_JP, flag, pp, end);
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}
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static int
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eucjp_is_code_ctype(OnigCodePoint code, unsigned int ctype)
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{
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if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
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if (code < 128)
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return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
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else
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return (eucjp_code_to_mbclen(code) > 1 ? TRUE : FALSE);
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ctype &= ~ONIGENC_CTYPE_WORD;
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if (ctype == 0) return FALSE;
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}
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if (code < 128)
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return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
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else
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return FALSE;
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}
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static UChar*
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eucjp_left_adjust_char_head(UChar* start, UChar* s)
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{
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/* In this encoding
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mb-trail bytes doesn't mix with single bytes.
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*/
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UChar *p;
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int len;
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if (s <= start) return s;
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p = s;
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while (!eucjp_islead(*p) && p > start) p--;
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len = enc_len(ONIG_ENCODING_EUC_JP, p);
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if (p + len > s) return p;
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p += len;
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return p + ((s - p) & ~1);
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}
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static int
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eucjp_is_allowed_reverse_match(UChar* s, UChar* end)
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{
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UChar c = *s;
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if (c <= 0x7e || c == 0x8e || c == 0x8f)
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return TRUE;
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else
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return FALSE;
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}
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OnigEncodingType OnigEncodingEUC_JP = {
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eucjp_mbc_enc_len,
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"EUC-JP", /* name */
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3, /* 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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eucjp_mbc_to_code,
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eucjp_code_to_mbclen,
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eucjp_code_to_mbc,
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eucjp_mbc_to_normalize,
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eucjp_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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eucjp_is_code_ctype,
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onigenc_not_support_get_ctype_code_range,
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eucjp_left_adjust_char_head,
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eucjp_is_allowed_reverse_match
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};
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