зеркало из https://github.com/github/ruby.git
288 строки
7.2 KiB
C
288 строки
7.2 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) 2002-2007 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 "regint.h"
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#define eucjp_islead(c) ((UChar )((c) - 0xa1) > 0xfe - 0xa1)
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static const 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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mbc_enc_len(const UChar* p, const UChar* e, OnigEncoding enc)
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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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mbc_to_code(const UChar* p, const UChar* end, OnigEncoding enc)
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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, end);
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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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code_to_mbclen(OnigCodePoint code, OnigEncoding enc)
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{
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if (ONIGENC_IS_CODE_ASCII(code)) return 1;
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else if (code > 0xffffff) return 0;
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else if ((code & 0xff0000) >= 0x800000) return 3;
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else if ((code & 0xff00) >= 0x8000) 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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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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code_to_mbc(OnigCodePoint code, UChar *buf, OnigEncoding enc)
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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) != (p - buf))
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return ONIGENC_ERR_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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mbc_case_fold(OnigCaseFoldType flag,
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const UChar** pp, const UChar* end, UChar* lower,
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OnigEncoding enc)
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{
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int len;
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const UChar* p = *pp;
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if (ONIGENC_IS_MBC_ASCII(p)) {
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*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
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(*pp)++;
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return 1;
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}
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else {
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int i;
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len = enc_len(ONIG_ENCODING_EUC_JP, p, end);
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for (i = 0; i < len; i++) {
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*lower++ = *p++;
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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 UChar*
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left_adjust_char_head(const UChar* start, const UChar* s, OnigEncoding enc)
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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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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 (!eucjp_islead(*p) && p > start) p--;
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len = enc_len(ONIG_ENCODING_EUC_JP, p, s);
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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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is_allowed_reverse_match(const UChar* s, const UChar* end, OnigEncoding enc)
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{
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const 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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static int PropertyInited = 0;
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static const OnigCodePoint** PropertyList;
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static int PropertyListNum;
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static int PropertyListSize;
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static hash_table_type* PropertyNameTable;
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static const OnigCodePoint CR_Hiragana[] = {
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1,
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0xa4a1, 0xa4f3
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}; /* CR_Hiragana */
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static const OnigCodePoint CR_Katakana[] = {
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3,
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0xa5a1, 0xa5f6,
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0xaaa6, 0xaaaf,
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0xaab1, 0xaadd
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}; /* CR_Katakana */
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static int
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init_property_list(void)
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{
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int r;
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PROPERTY_LIST_ADD_PROP("Hiragana", CR_Hiragana);
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PROPERTY_LIST_ADD_PROP("Katakana", CR_Katakana);
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PropertyInited = 1;
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end:
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return r;
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}
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static int
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property_name_to_ctype(OnigEncoding enc, UChar* p, UChar* end)
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{
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int ctype;
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PROPERTY_LIST_INIT_CHECK;
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if (onig_st_lookup_strend(PropertyNameTable, p, end, (void*)&ctype) == 0) {
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return onigenc_minimum_property_name_to_ctype(enc, p, end);
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}
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return ctype;
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}
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static int
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is_code_ctype(OnigCodePoint code, unsigned int ctype, OnigEncoding enc)
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{
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if (ctype <= ONIGENC_MAX_STD_CTYPE) {
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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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if (CTYPE_IS_WORD_GRAPH_PRINT(ctype)) {
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return (code_to_mbclen(code, enc) > 1 ? TRUE : FALSE);
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}
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}
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}
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else {
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PROPERTY_LIST_INIT_CHECK;
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ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
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if (ctype >= (unsigned int )PropertyListNum)
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return ONIGENC_ERR_TYPE_BUG;
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return onig_is_in_code_range((UChar* )PropertyList[ctype], code);
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}
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return FALSE;
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}
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static int
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get_ctype_code_range(int ctype, OnigCodePoint* sb_out,
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const OnigCodePoint* ranges[], OnigEncoding enc)
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{
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if (ctype <= ONIGENC_MAX_STD_CTYPE) {
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return ONIG_NO_SUPPORT_CONFIG;
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}
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else {
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*sb_out = 0x80;
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PROPERTY_LIST_INIT_CHECK;
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ctype -= (ONIGENC_MAX_STD_CTYPE + 1);
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if (ctype >= PropertyListNum)
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return ONIGENC_ERR_TYPE_BUG;
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*ranges = PropertyList[ctype];
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return 0;
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}
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}
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OnigEncodingType OnigEncodingEUC_JP = {
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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_is_mbc_newline_0x0a,
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mbc_to_code,
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code_to_mbclen,
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code_to_mbc,
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mbc_case_fold,
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onigenc_ascii_apply_all_case_fold,
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onigenc_ascii_get_case_fold_codes_by_str,
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property_name_to_ctype,
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is_code_ctype,
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get_ctype_code_range,
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left_adjust_char_head,
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is_allowed_reverse_match,
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0
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};
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