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