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270 lines
8.3 KiB
C
270 lines
8.3 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.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_utf8.h"
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static int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter);
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static const unsigned char mblen_table_utf8[] = {
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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, 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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3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
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4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 1, 1
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};
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static const char *mbfl_encoding_utf8_aliases[] = {"utf8", NULL};
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const mbfl_encoding mbfl_encoding_utf8 = {
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mbfl_no_encoding_utf8,
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"UTF-8",
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"UTF-8",
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(const char *(*)[])&mbfl_encoding_utf8_aliases,
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mblen_table_utf8,
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MBFL_ENCTYPE_MBCS
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};
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const struct mbfl_identify_vtbl vtbl_identify_utf8 = {
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mbfl_no_encoding_utf8,
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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_utf8
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};
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const struct mbfl_convert_vtbl vtbl_utf8_wchar = {
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mbfl_no_encoding_utf8,
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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_utf8_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_utf8 = {
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mbfl_no_encoding_wchar,
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mbfl_no_encoding_utf8,
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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_utf8,
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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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* UTF-8 => wchar
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*/
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int mbfl_filt_conv_utf8_wchar(int c, mbfl_convert_filter *filter)
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{
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int s;
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if (c < 0x80) {
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if (c >= 0) {
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CK((*filter->output_function)(c, filter->data));
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}
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filter->status = 0;
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} else if (c < 0xc0) {
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switch (filter->status & 0xff) {
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case 0x10: /* 2byte code 2nd char */
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case 0x21: /* 3byte code 3rd char */
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case 0x32: /* 4byte code 4th char */
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case 0x43: /* 5byte code 5th char */
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case 0x54: /* 6byte code 6th char */
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filter->status = 0;
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s = filter->cache | (c & 0x3f);
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if (s >= 0x80) {
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CK((*filter->output_function)(s, filter->data));
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}
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break;
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case 0x20: /* 3byte code 2nd char */
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case 0x31: /* 4byte code 3rd char */
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case 0x42: /* 5byte code 4th char */
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case 0x53: /* 6byte code 5th char */
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filter->cache |= ((c & 0x3f) << 6);
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filter->status++;
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break;
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case 0x30: /* 4byte code 2nd char */
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case 0x41: /* 5byte code 3rd char */
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case 0x52: /* 6byte code 4th char */
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filter->cache |= ((c & 0x3f) << 12);
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filter->status++;
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break;
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case 0x40: /* 5byte code 2nd char */
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case 0x51: /* 6byte code 3rd char */
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filter->cache |= ((c & 0x3f) << 18);
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filter->status++;
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break;
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case 0x50: /* 6byte code 2nd char */
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filter->cache |= ((c & 0x3f) << 24);
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filter->status++;
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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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} else if (c < 0xe0) { /* 2byte code first char */
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filter->status = 0x10;
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filter->cache = (c & 0x1f) << 6;
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} else if (c < 0xf0) { /* 3byte code first char */
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filter->status = 0x20;
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filter->cache = (c & 0xf) << 12;
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} else if (c < 0xf8) { /* 4byte code first char */
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filter->status = 0x30;
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filter->cache = (c & 0x7) << 18;
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} else if (c < 0xfc) { /* 5byte code first char */
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filter->status = 0x40;
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filter->cache = (c & 0x3) << 24;
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} else if (c < 0xfe) { /* 6 byte code first char */
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filter->status = 0x50;
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filter->cache = (c & 0x1) << 30;
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} else {
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filter->status = 0;
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filter->cache = 0;
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}
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return c;
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}
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/*
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* wchar => UTF-8
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*/
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int mbfl_filt_conv_wchar_utf8(int c, mbfl_convert_filter *filter)
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{
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if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
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if (c < 0x80) {
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CK((*filter->output_function)(c, filter->data));
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} else if (c < 0x800) {
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CK((*filter->output_function)(((c >> 6) & 0x1f) | 0xc0, filter->data));
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CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
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} else if (c < 0x10000) {
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CK((*filter->output_function)(((c >> 12) & 0x0f) | 0xe0, filter->data));
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CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
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} else if (c < 0x200000) {
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CK((*filter->output_function)(((c >> 18) & 0x07) | 0xf0, filter->data));
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CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
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} else if (c < 0x4000000) {
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CK((*filter->output_function)(((c >> 24) & 0x03) | 0xf8, filter->data));
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CK((*filter->output_function)(((c >> 18) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
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} else {
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CK((*filter->output_function)(((c >> 30) & 0x01) | 0xfc, filter->data));
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CK((*filter->output_function)(((c >> 24) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 18) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
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CK((*filter->output_function)((c & 0x3f) | 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_utf8(int c, mbfl_identify_filter *filter)
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{
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if (c < 0x80) {
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if (c < 0) {
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filter->flag = 1; /* bad */
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} else if (c != 0 && filter->status) {
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filter->flag = 1; /* bad */
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}
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filter->status = 0;
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} else if (c < 0xc0) {
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switch (filter->status) {
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case 0x20: /* 3 byte code 2nd char */
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case 0x30: /* 4 byte code 2nd char */
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case 0x31: /* 4 byte code 3rd char */
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case 0x40: /* 5 byte code 2nd char */
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case 0x41: /* 5 byte code 3rd char */
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case 0x42: /* 5 byte code 4th char */
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case 0x50: /* 6 byte code 2nd char */
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case 0x51: /* 6 byte code 3rd char */
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case 0x52: /* 6 byte code 4th char */
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case 0x53: /* 6 byte code 5th char */
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filter->status++;
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break;
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case 0x10: /* 2 byte code 2nd char */
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case 0x21: /* 3 byte code 3rd char */
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case 0x32: /* 4 byte code 4th char */
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case 0x43: /* 5 byte code 5th char */
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case 0x54: /* 6 byte code 6th char */
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filter->status = 0;
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break;
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default:
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filter->flag = 1; /* bad */
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filter->status = 0;
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break;
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}
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} else {
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if (filter->status) {
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filter->flag = 1; /* bad */
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}
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filter->status = 0;
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if (c < 0xe0) { /* 2 byte code first char */
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filter->status = 0x10;
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} else if (c < 0xf0) { /* 3 byte code 1st char */
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filter->status = 0x20;
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} else if (c < 0xf8) { /* 4 byte code 1st char */
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filter->status = 0x30;
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} else if (c < 0xfc) { /* 5 byte code 1st char */
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filter->status = 0x40;
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} else if (c < 0xfe) { /* 6 byte code 1st char */
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filter->status = 0x50;
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} else {
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filter->flag = 1; /* bad */
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}
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}
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return c;
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}
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