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332 lines
8.9 KiB
C
332 lines
8.9 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_euc_jp.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_eucjp(int c, mbfl_identify_filter *filter);
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static const unsigned char mblen_table_eucjp[] = { /* 0xA1-0xFE */
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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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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 3,
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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, 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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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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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, 1
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};
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static const char *mbfl_encoding_euc_jp_aliases[] = {"EUC", "EUC_JP", "eucJP", "x-euc-jp", NULL};
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const mbfl_encoding mbfl_encoding_euc_jp = {
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mbfl_no_encoding_euc_jp,
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"EUC-JP",
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"EUC-JP",
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(const char *(*)[])&mbfl_encoding_euc_jp_aliases,
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mblen_table_eucjp,
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MBFL_ENCTYPE_MBCS
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};
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const struct mbfl_identify_vtbl vtbl_identify_eucjp = {
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mbfl_no_encoding_euc_jp,
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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_eucjp
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};
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const struct mbfl_convert_vtbl vtbl_eucjp_wchar = {
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mbfl_no_encoding_euc_jp,
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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_eucjp_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_eucjp = {
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mbfl_no_encoding_wchar,
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mbfl_no_encoding_euc_jp,
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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_eucjp,
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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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/*
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* EUC-JP => wchar
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*/
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int
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mbfl_filt_conv_eucjp_wchar(int c, mbfl_convert_filter *filter)
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{
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int c1, s, 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 < 0xff) { /* X 0208 first char */
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filter->status = 1;
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filter->cache = c;
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} else if (c == 0x8e) { /* kana first char */
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filter->status = 2;
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} else if (c == 0x8f) { /* X 0212 first char */
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filter->status = 3;
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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: /* got first half */
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filter->status = 0;
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c1 = filter->cache;
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if (c > 0xa0 && c < 0xff) {
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s = (c1 - 0xa1)*94 + c - 0xa1;
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if (s >= 0 && s < jisx0208_ucs_table_size) {
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w = jisx0208_ucs_table[s];
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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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w = ((c1 & 0x7f) << 8) | (c & 0x7f);
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w &= MBFL_WCSPLANE_MASK;
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w |= MBFL_WCSPLANE_JIS0208;
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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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case 2: /* got 0x8e */
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filter->status = 0;
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if (c > 0xa0 && c < 0xe0) {
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w = 0xfec0 + c;
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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 = 0x8e00 | 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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case 3: /* got 0x8f, X 0212 first char */
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if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
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CK((*filter->output_function)(c, filter->data));
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filter->status = 0;
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} else {
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filter->status++;
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filter->cache = c;
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}
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break;
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case 4: /* got 0x8f, X 0212 second char */
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filter->status = 0;
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c1 = filter->cache;
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if (c1 > 0xa0 && c1 < 0xff && c > 0xa0 && c < 0xff) {
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s = (c1 - 0xa1)*94 + c - 0xa1;
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if (s >= 0 && s < jisx0212_ucs_table_size) {
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w = jisx0212_ucs_table[s];
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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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w = ((c1 & 0x7f) << 8) | (c & 0x7f);
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w &= MBFL_WCSPLANE_MASK;
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w |= MBFL_WCSPLANE_JIS0212;
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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 | 0x8f0000;
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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 => EUC-JP
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*/
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int
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mbfl_filt_conv_wchar_eucjp(int c, mbfl_convert_filter *filter)
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{
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int c1, s;
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s = 0;
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if (c >= ucs_a1_jis_table_min && c < ucs_a1_jis_table_max) {
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s = 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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s = 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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s = 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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s = ucs_r_jis_table[c - ucs_r_jis_table_min];
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}
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if (s <= 0) {
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c1 = c & ~MBFL_WCSPLANE_MASK;
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if (c1 == MBFL_WCSPLANE_JIS0208) {
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s = c & MBFL_WCSPLANE_MASK;
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} else if (c1 == MBFL_WCSPLANE_JIS0212) {
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s = c & MBFL_WCSPLANE_MASK;
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s |= 0x8080;
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} else if (c == 0xff3c) { /* FULLWIDTH REVERSE SOLIDUS */
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s = 0x2140;
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} else if (c == 0xff5e) { /* FULLWIDTH TILDE */
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s = 0x2141;
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} else if (c == 0x2225) { /* PARALLEL TO */
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s = 0x2142;
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} else if (c == 0xff0d) { /* FULLWIDTH HYPHEN-MINUS */
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s = 0x215d;
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} else if (c == 0xffe0) { /* FULLWIDTH CENT SIGN */
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s = 0x2171;
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} else if (c == 0xffe1) { /* FULLWIDTH POUND SIGN */
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s = 0x2172;
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} else if (c == 0xffe2) { /* FULLWIDTH NOT SIGN */
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s = 0x224c;
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}
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if (c == 0) {
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s = 0;
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} else if (s <= 0) {
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s = -1;
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}
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}
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if (s >= 0) {
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if (s < 0x80) { /* latin */
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CK((*filter->output_function)(s, filter->data));
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} else if (s < 0x100) { /* kana */
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CK((*filter->output_function)(0x8e, filter->data));
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CK((*filter->output_function)(s, filter->data));
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} else if (s < 0x8080) { /* X 0208 */
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CK((*filter->output_function)(((s >> 8) & 0xff) | 0x80, filter->data));
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CK((*filter->output_function)((s & 0xff) | 0x80, filter->data));
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} else { /* X 0212 */
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CK((*filter->output_function)(0x8f, filter->data));
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CK((*filter->output_function)(((s >> 8) & 0xff) | 0x80, filter->data));
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CK((*filter->output_function)((s & 0xff) | 0x80, 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_eucjp(int c, mbfl_identify_filter *filter)
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{
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switch (filter->status) {
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case 0: /* latin */
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if (c >= 0 && c < 0x80) { /* ok */
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;
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} else if (c > 0xa0 && c < 0xff) { /* kanji first char */
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filter->status = 1;
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} else if (c == 0x8e) { /* kana first char */
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filter->status = 2;
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} else if (c == 0x8f) { /* X 0212 first char */
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filter->status = 3;
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} else { /* bad */
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filter->flag = 1;
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}
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break;
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case 1: /* got first half */
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if (c < 0xa1 || c > 0xfe) { /* bad */
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filter->flag = 1;
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}
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filter->status = 0;
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break;
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case 2: /* got 0x8e */
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if (c < 0xa1 || c > 0xdf) { /* bad */
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filter->flag = 1;
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}
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filter->status = 0;
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break;
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case 3: /* got 0x8f */
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if (c < 0xa1 || c > 0xfe) { /* bad */
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filter->flag = 1;
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}
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filter->status++;
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break;
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case 4: /* got 0x8f */
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if (c < 0xa1 || c > 0xfe) { /* bad */
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filter->flag = 1;
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}
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filter->status = 0;
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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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