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/**********************************************************************
sjis.c - Oniguruma (regular expression library)
Copyright (C) 2003-2004 K.Kosako (kosako@sofnec.co.jp)
**********************************************************************/
#include "regenc.h"
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) (OnigEncodingSJIS.len_table[byte] > 1)
#define SJIS_ISMB_TRAIL(byte) SJIS_CAN_BE_TRAIL_TABLE[(byte)]
static OnigCodePoint
sjis_mbc_to_code(UChar* p, UChar* end)
{
int c, i, len;
OnigCodePoint n;
c = *p++;
len = enc_len(ONIG_ENCODING_SJIS, c);
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[0]) != (p - buf))
return REGERR_INVALID_WIDE_CHAR_VALUE;
#endif
return p - buf;
}
static int
sjis_mbc_to_lower(UChar* p, UChar* lower)
{
int len;
if (ONIGENC_IS_MBC_ASCII(p)) {
*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
return 1;
}
else {
len = enc_len(ONIG_ENCODING_SJIS, *p);
if (lower != p) {
/* memcpy(lower, p, len); */
int i;
for (i = 0; i < len; i++) {
*lower++ = *p++;
}
}
return len; /* return byte length of converted char to lower */
}
}
static int
sjis_code_is_ctype(OnigCodePoint code, unsigned int ctype)
{
if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
if (code < 128)
return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
else {
int first = onigenc_mb2_code_to_mbc_first(code);
return (enc_len(ONIG_ENCODING_SJIS, first) > 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 = {
{
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 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
},
"Shift_JIS", /* name */
2, /* max byte length */
FALSE, /* is_fold_match */
ONIGENC_CTYPE_SUPPORT_LEVEL_SB, /* ctype_support_level */
FALSE, /* is continuous sb mb codepoint */
sjis_mbc_to_code,
onigenc_mb2_code_to_mbclen,
sjis_code_to_mbc,
sjis_mbc_to_lower,
onigenc_mbn_mbc_is_case_ambig,
sjis_code_is_ctype,
onigenc_nothing_get_ctype_code_range,
sjis_left_adjust_char_head,
sjis_is_allowed_reverse_match,
onigenc_nothing_get_all_fold_match_code,
onigenc_nothing_get_fold_match_info
};
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