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/*
* "streamable kanji code filter and converter"
* Copyright (c) 1998-2002 HappySize, Inc. All rights reserved.
*
* LICENSE NOTICES
*
* This file is part of "streamable kanji code filter and converter",
* which is distributed under the terms of GNU Lesser General Public
* License (version 2) as published by the Free Software Foundation.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with "streamable kanji code filter and converter";
* if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* The author of this file:
*
*/
/*
* The source code included in this files was separated from mbfilter_ja.c
* by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_sjis.h"
#include "unicode_table_cp932_ext.h"
#include "unicode_table_jis.h"
static int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter);
static const unsigned char mblen_table_sjis[] = { /* 0x80-0x9f,0xE0-0xFF */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 2, 2, 2
};
static const char *mbfl_encoding_sjis_aliases[] = {"x-sjis", "SHIFT-JIS", NULL};
const mbfl_encoding mbfl_encoding_sjis = {
mbfl_no_encoding_sjis,
"SJIS",
"Shift_JIS",
(const char *(*)[])&mbfl_encoding_sjis_aliases,
mblen_table_sjis,
MBFL_ENCTYPE_MBCS
};
const struct mbfl_identify_vtbl vtbl_identify_sjis = {
mbfl_no_encoding_sjis,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_sjis
};
const struct mbfl_convert_vtbl vtbl_sjis_wchar = {
mbfl_no_encoding_sjis,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_sjis_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_sjis = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_sjis,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_sjis,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
#define SJIS_ENCODE(c1,c2,s1,s2) \
do { \
s1 = c1; \
s1--; \
s1 >>= 1; \
if ((c1) < 0x5f) { \
s1 += 0x71; \
} else { \
s1 += 0xb1; \
} \
s2 = c2; \
if ((c1) & 1) { \
if ((c2) < 0x60) { \
s2--; \
} \
s2 += 0x20; \
} else { \
s2 += 0x7e; \
} \
} while (0)
#define SJIS_DECODE(c1,c2,s1,s2) \
do { \
s1 = c1; \
if (s1 < 0xa0) { \
s1 -= 0x81; \
} else { \
s1 -= 0xc1; \
} \
s1 <<= 1; \
s1 += 0x21; \
s2 = c2; \
if (s2 < 0x9f) { \
if (s2 < 0x7f) { \
s2++; \
} \
s2 -= 0x20; \
} else { \
s1++; \
s2 -= 0x7e; \
} \
} while (0)
/*
* SJIS => wchar
*/
int
mbfl_filt_conv_sjis_wchar(int c, mbfl_convert_filter *filter)
{
int c1, s1, s2, w;
switch (filter->status) {
case 0:
if (c >= 0 && c < 0x80) { /* latin */
CK((*filter->output_function)(c, filter->data));
} else if (c > 0xa0 && c < 0xe0) { /* kana */
CK((*filter->output_function)(0xfec0 + c, filter->data));
} else if (c > 0x80 && c < 0xfd && c != 0xa0) { /* kanji first char */
filter->status = 1;
filter->cache = c;
} else {
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 1: /* kanji second char */
filter->status = 0;
c1 = filter->cache;
if (c > 0x39 && c < 0xfd && c != 0x7f) {
SJIS_DECODE(c1, c, s1, s2);
w = (s1 - 0x21)*94 + s2 - 0x21;
if (w >= 0 && w < jisx0208_ucs_table_size) {
w = jisx0208_ucs_table[w];
} else {
w = 0;
}
if (w <= 0) {
if (s1 < 0x7f && s2 < 0x7f) {
w = (s1 << 8) | s2;
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_JIS0208;
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
}
}
CK((*filter->output_function)(w, filter->data));
} else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
CK((*filter->output_function)(c, filter->data));
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
default:
filter->status = 0;
break;
}
return c;
}
/*
* wchar => SJIS
*/
int
mbfl_filt_conv_wchar_sjis(int c, mbfl_convert_filter *filter)
{
int c1, c2, s1, s2;
s1 = 0;
if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
s1 = ucs_a1_jis_table[c - ucs_a1_jis_table_min];
} else if (c >= ucs_a2_jis_table_min && c < ucs_a2_jis_table_max) {
s1 = ucs_a2_jis_table[c - ucs_a2_jis_table_min];
} else if (c >= ucs_i_jis_table_min && c < ucs_i_jis_table_max) {
s1 = ucs_i_jis_table[c - ucs_i_jis_table_min];
} else if (c >= ucs_r_jis_table_min && c < ucs_r_jis_table_max) {
s1 = ucs_r_jis_table[c - ucs_r_jis_table_min];
}
if (s1 <= 0) {
c1 = c & ~MBFL_WCSPLANE_MASK;
if (c1 == MBFL_WCSPLANE_JIS0208) {
s1 = c & MBFL_WCSPLANE_MASK;
} else if (c == 0xa5) { /* YEN SIGN */
s1 = 0x216f; /* FULLWIDTH YEN SIGN */
} else if (c == 0x203e) { /* OVER LINE */
s1 = 0x2131; /* FULLWIDTH MACRON */
} else if (c == 0xff3c) { /* FULLWIDTH REVERSE SOLIDUS */
s1 = 0x2140;
} else if (c == 0xff5e) { /* FULLWIDTH TILDE */
s1 = 0x2141;
} else if (c == 0x2225) { /* PARALLEL TO */
s1 = 0x2142;
} else if (c == 0xff0d) { /* FULLWIDTH HYPHEN-MINUS */
s1 = 0x215d;
} else if (c == 0xffe0) { /* FULLWIDTH CENT SIGN */
s1 = 0x2171;
} else if (c == 0xffe1) { /* FULLWIDTH POUND SIGN */
s1 = 0x2172;
} else if (c == 0xffe2) { /* FULLWIDTH NOT SIGN */
s1 = 0x224c;
}
if (c == 0) {
s1 = 0;
} else if (s1 <= 0) {
s1 = -1;
}
} else if (s1 >= 0x8080) {
s1 = -1;
}
if (s1 >= 0) {
if (s1 < 0x100) { /* latin or kana */
CK((*filter->output_function)(s1, filter->data));
} else { /* kanji */
c1 = (s1 >> 8) & 0xff;
c2 = s1 & 0xff;
SJIS_ENCODE(c1, c2, s1, s2);
CK((*filter->output_function)(s1, filter->data));
CK((*filter->output_function)(s2, filter->data));
}
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
static int mbfl_filt_ident_sjis(int c, mbfl_identify_filter *filter)
{
if (filter->status) { /* kanji second char */
if (c < 0x40 || c > 0xfc || c == 0x7f) { /* bad */
filter->flag = 1;
}
filter->status = 0;
} else if (c >= 0 && c < 0x80) { /* latin ok */
;
} else if (c > 0xa0 && c < 0xe0) { /* kana ok */
;
} else if (c > 0x80 && c < 0xf0 && c != 0xa0) { /* kanji first char */
filter->status = 1;
} else { /* bad */
filter->flag = 1;
}
return c;
}
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