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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.c
* by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
*
*/
#include "mbfilter.h"
#include "mbfilter_utf8.h"
const unsigned char mblen_table_utf8[] = {
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,
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,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
};
static const char *mbfl_encoding_utf8_aliases[] = {"utf8", NULL};
const mbfl_encoding mbfl_encoding_utf8 = {
mbfl_no_encoding_utf8,
"UTF-8",
"UTF-8",
mbfl_encoding_utf8_aliases,
mblen_table_utf8,
0,
&vtbl_utf8_wchar,
&vtbl_wchar_utf8
};
const struct mbfl_convert_vtbl vtbl_utf8_wchar = {
mbfl_no_encoding_utf8,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
NULL,
mbfl_filt_conv_utf8_wchar,
mbfl_filt_conv_utf8_wchar_flush,
NULL,
};
const struct mbfl_convert_vtbl vtbl_wchar_utf8 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_utf8,
mbfl_filt_conv_common_ctor,
NULL,
mbfl_filt_conv_wchar_utf8,
mbfl_filt_conv_common_flush,
NULL,
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
int mbfl_filt_put_invalid_char(int c, mbfl_convert_filter *filter)
{
int w;
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
filter->status = 0;
filter->cache = 0;
CK((*filter->output_function)(w, filter->data));
return 0;
}
/*
* UTF-8 => wchar
*/
int mbfl_filt_conv_utf8_wchar(int c, mbfl_convert_filter *filter)
{
int s, c1;
retry:
switch (filter->status & 0xff) {
case 0x00:
if (c < 0x80) {
CK((*filter->output_function)(c, filter->data));
} else if (c >= 0xc2 && c <= 0xdf) { /* 2byte code first char: 0xc2-0xdf */
filter->status = 0x10;
filter->cache = c & 0x1f;
} else if (c >= 0xe0 && c <= 0xef) { /* 3byte code first char: 0xe0-0xef */
filter->status = 0x20;
filter->cache = c & 0xf;
} else if (c >= 0xf0 && c <= 0xf4) { /* 3byte code first char: 0xf0-0xf4 */
filter->status = 0x30;
filter->cache = c & 0x7;
} else {
CK(mbfl_filt_put_invalid_char(c, filter));
}
break;
case 0x10: /* 2byte code 2nd char: 0x80-0xbf */
case 0x21: /* 3byte code 3rd char: 0x80-0xbf */
case 0x32: /* 4byte code 4th char: 0x80-0xbf */
filter->status = 0;
if (c >= 0x80 && c <= 0xbf) {
s = (filter->cache<<6) | (c & 0x3f);
filter->cache = 0;
CK((*filter->output_function)(s, filter->data));
} else {
CK(mbfl_filt_put_invalid_char(filter->cache, filter));
goto retry;
}
break;
case 0x20: /* 3byte code 2nd char: 0:0xa0-0xbf,D:0x80-9F,1-C,E-F:0x80-0x9f */
s = (filter->cache<<6) | (c & 0x3f);
c1 = filter->cache & 0xf;
if ((c >= 0x80 && c <= 0xbf) &&
((c1 == 0x0 && c >= 0xa0) ||
(c1 == 0xd && c < 0xa0) ||
(c1 > 0x0 && c1 != 0xd))) {
filter->cache = s;
filter->status++;
} else {
CK(mbfl_filt_put_invalid_char(filter->cache, filter));
goto retry;
}
break;
case 0x30: /* 4byte code 2nd char: 0:0x90-0xbf,1-3:0x80-0xbf,4:0x80-0x8f */
s = (filter->cache<<6) | (c & 0x3f);
c1 = filter->cache & 0x7;
if ((c >= 0x80 && c <= 0xbf) &&
((c1 == 0x0 && c >= 0x90) ||
(c1 == 0x4 && c < 0x90) ||
(c1 > 0x0 && c1 != 0x4))) {
filter->cache = s;
filter->status++;
} else {
CK(mbfl_filt_put_invalid_char(filter->cache, filter));
goto retry;
}
break;
case 0x31: /* 4byte code 3rd char: 0x80-0xbf */
if (c >= 0x80 && c <= 0xbf) {
filter->cache = (filter->cache<<6) | (c & 0x3f);
filter->status++;
} else {
CK(mbfl_filt_put_invalid_char(filter->cache, filter));
goto retry;
}
break;
default:
filter->status = 0;
break;
}
return c;
}
int mbfl_filt_conv_utf8_wchar_flush(mbfl_convert_filter *filter)
{
int status, cache;
status = filter->status;
cache = filter->cache;
filter->status = 0;
filter->cache = 0;
if (status != 0) {
CK(mbfl_filt_put_invalid_char(cache, filter));
}
if (filter->flush_function != NULL) {
(*filter->flush_function)(filter->data);
}
return 0;
}
/*
* wchar => UTF-8
*/
int mbfl_filt_conv_wchar_utf8(int c, mbfl_convert_filter *filter)
{
if (c >= 0 && c < 0x110000) {
if (c < 0x80) {
CK((*filter->output_function)(c, filter->data));
} else if (c < 0x800) {
CK((*filter->output_function)(((c >> 6) & 0x1f) | 0xc0, filter->data));
CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
} else if (c < 0x10000) {
CK((*filter->output_function)(((c >> 12) & 0x0f) | 0xe0, filter->data));
CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
} else {
CK((*filter->output_function)(((c >> 18) & 0x07) | 0xf0, filter->data));
CK((*filter->output_function)(((c >> 12) & 0x3f) | 0x80, filter->data));
CK((*filter->output_function)(((c >> 6) & 0x3f) | 0x80, filter->data));
CK((*filter->output_function)((c & 0x3f) | 0x80, filter->data));
}
} else {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
return c;
}
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