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oniguruma /
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euc_jp.c
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Tue Feb 21 23:47:57 2012 UTC (12 years, 6 months ago) by
misho
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CVS tags:
v5_4_3elwix,
v5_4_29p0,
v5_4_29,
v5_4_20p0,
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v5_4_17p0,
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/**********************************************************************
euc_jp.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2005 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"
#define eucjp_islead(c) ((UChar )((c) - 0xa1) > 0xfe - 0xa1)
static const int EncLen_EUCJP[] = {
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, 2, 3,
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
eucjp_mbc_enc_len(const UChar* p)
{
return EncLen_EUCJP[*p];
}
static OnigCodePoint
eucjp_mbc_to_code(const UChar* p, const UChar* end)
{
int c, i, len;
OnigCodePoint n;
len = enc_len(ONIG_ENCODING_EUC_JP, p);
n = (OnigCodePoint )*p++;
if (len == 1) return n;
for (i = 1; i < len; i++) {
if (p >= end) break;
c = *p++;
n <<= 8; n += c;
}
return n;
}
static int
eucjp_code_to_mbclen(OnigCodePoint code)
{
if (ONIGENC_IS_CODE_ASCII(code)) return 1;
else if ((code & 0xff0000) != 0) return 3;
else if ((code & 0xff00) != 0) return 2;
else return 0;
}
#if 0
static int
eucjp_code_to_mbc_first(OnigCodePoint code)
{
int first;
if ((code & 0xff0000) != 0) {
first = (code >> 16) & 0xff;
}
else if ((code & 0xff00) != 0) {
first = (code >> 8) & 0xff;
}
else {
return (int )code;
}
return first;
}
#endif
static int
eucjp_code_to_mbc(OnigCodePoint code, UChar *buf)
{
UChar *p = buf;
if ((code & 0xff0000) != 0) *p++ = (UChar )(((code >> 16) & 0xff));
if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
*p++ = (UChar )(code & 0xff);
#if 1
if (enc_len(ONIG_ENCODING_EUC_JP, buf) != (p - buf))
return ONIGENCERR_INVALID_WIDE_CHAR_VALUE;
#endif
return p - buf;
}
static int
eucjp_mbc_to_normalize(OnigAmbigType flag,
const UChar** pp, const UChar* end, UChar* lower)
{
int len;
const UChar* p = *pp;
if (ONIGENC_IS_MBC_ASCII(p)) {
if ((flag & ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE) != 0) {
*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
}
else {
*lower = *p;
}
(*pp)++;
return 1;
}
else {
len = enc_len(ONIG_ENCODING_EUC_JP, p);
if (lower != p) {
int i;
for (i = 0; i < len; i++) {
*lower++ = *p++;
}
}
(*pp) += len;
return len; /* return byte length of converted char to lower */
}
}
static int
eucjp_is_mbc_ambiguous(OnigAmbigType flag, const UChar** pp, const UChar* end)
{
return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_EUC_JP, flag, pp, end);
}
static int
eucjp_is_code_ctype(OnigCodePoint code, unsigned int ctype)
{
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else {
if ((ctype & (ONIGENC_CTYPE_WORD |
ONIGENC_CTYPE_GRAPH | ONIGENC_CTYPE_PRINT)) != 0) {
return (eucjp_code_to_mbclen(code) > 1 ? TRUE : FALSE);
}
}
return FALSE;
}
static UChar*
eucjp_left_adjust_char_head(const UChar* start, const UChar* s)
{
/* In this encoding
mb-trail bytes doesn't mix with single bytes.
*/
const UChar *p;
int len;
if (s <= start) return (UChar* )s;
p = s;
while (!eucjp_islead(*p) && p > start) p--;
len = enc_len(ONIG_ENCODING_EUC_JP, p);
if (p + len > s) return (UChar* )p;
p += len;
return (UChar* )(p + ((s - p) & ~1));
}
static int
eucjp_is_allowed_reverse_match(const UChar* s, const UChar* end)
{
const UChar c = *s;
if (c <= 0x7e || c == 0x8e || c == 0x8f)
return TRUE;
else
return FALSE;
}
OnigEncodingType OnigEncodingEUC_JP = {
eucjp_mbc_enc_len,
"EUC-JP", /* name */
3, /* max enc length */
1, /* min enc length */
ONIGENC_AMBIGUOUS_MATCH_ASCII_CASE,
{
(OnigCodePoint )'\\' /* esc */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar '.' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anytime '*' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* zero or one time '?' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* one or more time '+' */
, (OnigCodePoint )ONIG_INEFFECTIVE_META_CHAR /* anychar anytime */
},
onigenc_is_mbc_newline_0x0a,
eucjp_mbc_to_code,
eucjp_code_to_mbclen,
eucjp_code_to_mbc,
eucjp_mbc_to_normalize,
eucjp_is_mbc_ambiguous,
onigenc_ascii_get_all_pair_ambig_codes,
onigenc_nothing_get_all_comp_ambig_codes,
eucjp_is_code_ctype,
onigenc_not_support_get_ctype_code_range,
eucjp_left_adjust_char_head,
eucjp_is_allowed_reverse_match
};
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