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267 lines
6.8 KiB
C
267 lines
6.8 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_kr.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_uhc.h"
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#include "unicode_table_uhc.h"
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static int mbfl_filt_ident_uhc(int c, mbfl_identify_filter *filter);
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static const unsigned char mblen_table_uhc[] = { /* 0x81-0xFE */
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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, 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, 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_uhc_aliases[] = {"CP949", NULL};
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const mbfl_encoding mbfl_encoding_uhc = {
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mbfl_no_encoding_uhc,
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"UHC",
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"UHC",
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(const char *(*)[])&mbfl_encoding_uhc_aliases,
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mblen_table_uhc,
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MBFL_ENCTYPE_MBCS
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};
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const struct mbfl_identify_vtbl vtbl_identify_uhc = {
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mbfl_no_encoding_uhc,
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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_uhc
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};
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const struct mbfl_convert_vtbl vtbl_uhc_wchar = {
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mbfl_no_encoding_uhc,
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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_uhc_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_uhc = {
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mbfl_no_encoding_wchar,
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mbfl_no_encoding_uhc,
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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_uhc,
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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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* UHC => wchar
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*/
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int
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mbfl_filt_conv_uhc_wchar(int c, mbfl_convert_filter *filter)
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{
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int c1, w = 0, flag = 0;
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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 > 0x80 && c < 0xff && c != 0xc9) { /* dbcs lead byte */
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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: /* dbcs second byte */
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filter->status = 0;
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c1 = filter->cache;
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if ( c1 >= 0x81 && c1 <= 0xa0){
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w = (c1 - 0x81)*190 + (c - 0x41);
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if (w >= 0 && w < uhc1_ucs_table_size) {
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flag = 1;
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w = uhc1_ucs_table[w];
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} else {
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w = 0;
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}
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} else if ( c1 >= 0xa1 && c1 <= 0xc6){
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w = (c1 - 0xa1)*190 + (c - 0x41);
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if (w >= 0 && w < uhc2_ucs_table_size) {
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flag = 2;
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w = uhc2_ucs_table[w];
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} else {
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w = 0;
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}
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} else if ( c1 >= 0xc7 && c1 <= 0xfe){
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w = (c1 - 0xc7)*94 + (c - 0xa1);
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if (w >= 0 && w < uhc3_ucs_table_size) {
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flag = 3;
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w = uhc3_ucs_table[w];
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} else {
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w = 0;
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}
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}
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if (flag > 0){
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if (w <= 0) {
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w = (c1 << 8) | c;
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w &= MBFL_WCSPLANE_MASK;
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w |= MBFL_WCSPLANE_UHC;
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}
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CK((*filter->output_function)(w, filter->data));
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} else {
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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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} 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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}
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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 => UHC
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*/
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int
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mbfl_filt_conv_wchar_uhc(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_uhc_table_min && c < ucs_a1_uhc_table_max) {
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s = ucs_a1_uhc_table[c - ucs_a1_uhc_table_min];
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} else if (c >= ucs_a2_uhc_table_min && c < ucs_a2_uhc_table_max) {
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s = ucs_a2_uhc_table[c - ucs_a2_uhc_table_min];
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} else if (c >= ucs_a3_uhc_table_min && c < ucs_a3_uhc_table_max) {
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s = ucs_a3_uhc_table[c - ucs_a3_uhc_table_min];
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} else if (c >= ucs_i_uhc_table_min && c < ucs_i_uhc_table_max) {
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s = ucs_i_uhc_table[c - ucs_i_uhc_table_min];
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} else if (c >= ucs_s_uhc_table_min && c < ucs_s_uhc_table_max) {
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s = ucs_s_uhc_table[c - ucs_s_uhc_table_min];
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} else if (c >= ucs_r1_uhc_table_min && c < ucs_r1_uhc_table_max) {
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s = ucs_r1_uhc_table[c - ucs_r1_uhc_table_min];
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} else if (c >= ucs_r2_uhc_table_min && c < ucs_r2_uhc_table_max) {
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s = ucs_r2_uhc_table[c - ucs_r2_uhc_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_UHC) {
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s = c & MBFL_WCSPLANE_MASK;
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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 {
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CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
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CK((*filter->output_function)(s & 0xff, 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_uhc(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 >= 0x81 && c <= 0xa0) { /* dbcs first char */
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filter->status= 1;
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} else if (c >= 0xa1 && c <= 0xc6) { /* dbcs first char */
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filter->status= 2;
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} else if (c >= 0xc7 && c <= 0xfe) { /* dbcs 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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case 1:
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case 2:
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if (c < 0x41 || (c > 0x5a && c < 0x61)
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|| (c > 0x7a && c < 0x81) || 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 3:
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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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