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DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_utf8_wchar
- mbfl_filt_conv_wchar_utf8
- mbfl_filt_ident_utf8
/*
* "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.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_utf8.h"
static int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter);
static 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,
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, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 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",
(const char *(*)[])&mbfl_encoding_utf8_aliases,
mblen_table_utf8,
MBFL_ENCTYPE_MBCS
};
const struct mbfl_identify_vtbl vtbl_identify_utf8 = {
mbfl_no_encoding_utf8,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_utf8
};
const struct mbfl_convert_vtbl vtbl_utf8_wchar = {
mbfl_no_encoding_utf8,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_utf8_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_utf8 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_utf8,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_utf8,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* UTF-8 => wchar
*/
int mbfl_filt_conv_utf8_wchar(int c, mbfl_convert_filter *filter)
{
int s;
if (c < 0x80) {
if (c >= 0) {
CK((*filter->output_function)(c, filter->data));
}
filter->status = 0;
} else if (c < 0xc0) {
switch (filter->status & 0xff) {
case 0x10: /* 2byte code 2nd char */
case 0x21: /* 3byte code 3rd char */
case 0x32: /* 4byte code 4th char */
case 0x43: /* 5byte code 5th char */
case 0x54: /* 6byte code 6th char */
filter->status = 0;
s = filter->cache | (c & 0x3f);
if (s >= 0x80) {
CK((*filter->output_function)(s, filter->data));
}
break;
case 0x20: /* 3byte code 2nd char */
case 0x31: /* 4byte code 3rd char */
case 0x42: /* 5byte code 4th char */
case 0x53: /* 6byte code 5th char */
filter->cache |= ((c & 0x3f) << 6);
filter->status++;
break;
case 0x30: /* 4byte code 2nd char */
case 0x41: /* 5byte code 3rd char */
case 0x52: /* 6byte code 4th char */
filter->cache |= ((c & 0x3f) << 12);
filter->status++;
break;
case 0x40: /* 5byte code 2nd char */
case 0x51: /* 6byte code 3rd char */
filter->cache |= ((c & 0x3f) << 18);
filter->status++;
break;
case 0x50: /* 6byte code 2nd char */
filter->cache |= ((c & 0x3f) << 24);
filter->status++;
break;
default:
filter->status = 0;
break;
}
} else if (c < 0xe0) { /* 2byte code first char */
filter->status = 0x10;
filter->cache = (c & 0x1f) << 6;
} else if (c < 0xf0) { /* 3byte code first char */
filter->status = 0x20;
filter->cache = (c & 0xf) << 12;
} else if (c < 0xf8) { /* 4byte code first char */
filter->status = 0x30;
filter->cache = (c & 0x7) << 18;
} else if (c < 0xfc) { /* 5byte code first char */
filter->status = 0x40;
filter->cache = (c & 0x3) << 24;
} else if (c < 0xfe) { /* 6 byte code first char */
filter->status = 0x50;
filter->cache = (c & 0x1) << 30;
} else {
filter->status = 0;
filter->cache = 0;
}
return c;
}
/*
* wchar => UTF-8
*/
int mbfl_filt_conv_wchar_utf8(int c, mbfl_convert_filter *filter)
{
if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
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 if (c < 0x200000) {
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 if (c < 0x4000000) {
CK((*filter->output_function)(((c >> 24) & 0x03) | 0xf8, filter->data));
CK((*filter->output_function)(((c >> 18) & 0x3f) | 0x80, 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((*filter->output_function)(((c >> 30) & 0x01) | 0xfc, filter->data));
CK((*filter->output_function)(((c >> 24) & 0x3f) | 0x80, filter->data));
CK((*filter->output_function)(((c >> 18) & 0x3f) | 0x80, 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 {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
static int mbfl_filt_ident_utf8(int c, mbfl_identify_filter *filter)
{
if (c < 0x80) {
if (c < 0) {
filter->flag = 1; /* bad */
} else if (c != 0 && filter->status) {
filter->flag = 1; /* bad */
}
filter->status = 0;
} else if (c < 0xc0) {
switch (filter->status) {
case 0x20: /* 3 byte code 2nd char */
case 0x30: /* 4 byte code 2nd char */
case 0x31: /* 4 byte code 3rd char */
case 0x40: /* 5 byte code 2nd char */
case 0x41: /* 5 byte code 3rd char */
case 0x42: /* 5 byte code 4th char */
case 0x50: /* 6 byte code 2nd char */
case 0x51: /* 6 byte code 3rd char */
case 0x52: /* 6 byte code 4th char */
case 0x53: /* 6 byte code 5th char */
filter->status++;
break;
case 0x10: /* 2 byte code 2nd char */
case 0x21: /* 3 byte code 3rd char */
case 0x32: /* 4 byte code 4th char */
case 0x43: /* 5 byte code 5th char */
case 0x54: /* 6 byte code 6th char */
filter->status = 0;
break;
default:
filter->flag = 1; /* bad */
filter->status = 0;
break;
}
} else {
if (filter->status) {
filter->flag = 1; /* bad */
}
filter->status = 0;
if (c < 0xe0) { /* 2 byte code first char */
filter->status = 0x10;
} else if (c < 0xf0) { /* 3 byte code 1st char */
filter->status = 0x20;
} else if (c < 0xf8) { /* 4 byte code 1st char */
filter->status = 0x30;
} else if (c < 0xfc) { /* 5 byte code 1st char */
filter->status = 0x40;
} else if (c < 0xfe) { /* 6 byte code 1st char */
filter->status = 0x50;
} else {
filter->flag = 1; /* bad */
}
}
return c;
}