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/**********************************************************************
sjis.c - Oniguruma (regular expression library)
**********************************************************************/
/*-
* Copyright (c) 2002-2004 K.Kosako <kosako AT sofnec DOT co 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 int EncLen_SJIS[] = {
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, 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, 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, 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, 1, 1
};
static const char SJIS_CAN_BE_TRAIL_TABLE[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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, 0,
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, 0, 0, 0
};
#define SJIS_ISMB_FIRST(byte) (EncLen_SJIS[byte] > 1)
#define SJIS_ISMB_TRAIL(byte) SJIS_CAN_BE_TRAIL_TABLE[(byte)]
static int
sjis_mbc_enc_len(UChar* p)
{
return EncLen_SJIS[*p];
}
extern int
sjis_code_to_mbclen(OnigCodePoint code)
{
if (code < 256) {
if (EncLen_SJIS[(int )code] == 1)
return 1;
else
return 0;
}
else if (code <= 0xffff) {
return 2;
}
else
return 0;
}
static OnigCodePoint
sjis_mbc_to_code(UChar* p, UChar* end)
{
int c, i, len;
OnigCodePoint n;
len = enc_len(ONIG_ENCODING_SJIS, p);
c = *p++;
n = c;
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
sjis_code_to_mbc(OnigCodePoint code, UChar *buf)
{
UChar *p = buf;
if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
*p++ = (UChar )(code & 0xff);
#if 0
if (enc_len(ONIG_ENCODING_SJIS, buf) != (p - buf))
return REGERR_INVALID_WIDE_CHAR_VALUE;
#endif
return p - buf;
}
static int
sjis_mbc_to_normalize(OnigAmbigType flag, UChar** pp, UChar* end, UChar* lower)
{
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 {
int len = enc_len(ONIG_ENCODING_SJIS, 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
sjis_is_mbc_ambiguous(OnigAmbigType flag, UChar** pp, UChar* end)
{
return onigenc_mbn_is_mbc_ambiguous(ONIG_ENCODING_SJIS, flag, pp, end);
}
static int
sjis_is_code_ctype(OnigCodePoint code, unsigned int ctype)
{
if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else {
return (sjis_code_to_mbclen(code) > 1 ? TRUE : FALSE);
}
ctype &= ~ONIGENC_CTYPE_WORD;
if (ctype == 0) return FALSE;
}
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else
return FALSE;
}
static UChar*
sjis_left_adjust_char_head(UChar* start, UChar* s)
{
UChar *p;
int len;
if (s <= start) return s;
p = s;
if (SJIS_ISMB_TRAIL(*p)) {
while (p > start) {
if (! SJIS_ISMB_FIRST(*--p)) {
p++;
break;
}
}
}
len = enc_len(ONIG_ENCODING_SJIS, p);
if (p + len > s) return p;
p += len;
return p + ((s - p) & ~1);
}
static int
sjis_is_allowed_reverse_match(UChar* s, UChar* end)
{
UChar c = *s;
return (SJIS_ISMB_TRAIL(c) ? FALSE : TRUE);
}
OnigEncodingType OnigEncodingSJIS = {
sjis_mbc_enc_len,
"Shift_JIS", /* name */
2, /* max byte length */
1, /* min byte 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,
sjis_mbc_to_code,
sjis_code_to_mbclen,
sjis_code_to_mbc,
sjis_mbc_to_normalize,
sjis_is_mbc_ambiguous,
onigenc_ascii_get_all_pair_ambig_codes,
onigenc_nothing_get_all_comp_ambig_codes,
sjis_is_code_ctype,
onigenc_not_support_get_ctype_code_range,
sjis_left_adjust_char_head,
sjis_is_allowed_reverse_match
};
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