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DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_ucs4_wchar
- mbfl_filt_conv_ucs4be_wchar
- mbfl_filt_conv_wchar_ucs4be
- mbfl_filt_conv_ucs4le_wchar
- mbfl_filt_conv_wchar_ucs4le
/*
* "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_ucs4.h"
static const char *mbfl_encoding_ucs4_aliases[] = {"ISO-10646-UCS-4", "UCS4", NULL};
const mbfl_encoding mbfl_encoding_ucs4 = {
mbfl_no_encoding_ucs4,
"UCS-4",
"UCS-4",
(const char *(*)[])&mbfl_encoding_ucs4_aliases,
NULL,
MBFL_ENCTYPE_WCS4BE
};
const mbfl_encoding mbfl_encoding_ucs4be = {
mbfl_no_encoding_ucs4be,
"UCS-4BE",
"UCS-4BE",
NULL,
NULL,
MBFL_ENCTYPE_WCS4BE
};
const mbfl_encoding mbfl_encoding_ucs4le = {
mbfl_no_encoding_ucs4le,
"UCS-4LE",
"UCS-4LE",
NULL,
NULL,
MBFL_ENCTYPE_WCS4LE
};
const struct mbfl_convert_vtbl vtbl_ucs4_wchar = {
mbfl_no_encoding_ucs4,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_ucs4_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_ucs4 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_ucs4,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_ucs4be,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_ucs4be_wchar = {
mbfl_no_encoding_ucs4be,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_ucs4be_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_ucs4be = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_ucs4be,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_ucs4be,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_ucs4le_wchar = {
mbfl_no_encoding_ucs4le,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_ucs4le_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_ucs4le = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_ucs4le,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_ucs4le,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* UCS-4 => wchar
*/
int mbfl_filt_conv_ucs4_wchar(int c, mbfl_convert_filter *filter)
{
int n, endian;
endian = filter->status & 0xff00;
switch (filter->status & 0xff) {
case 0:
if (endian) {
n = c & 0xff;
} else {
n = (c & 0xff) << 24;
}
filter->cache = n;
filter->status++;
break;
case 1:
if (endian) {
n = (c & 0xff) << 8;
} else {
n = (c & 0xff) << 16;
}
filter->cache |= n;
filter->status++;
break;
case 2:
if (endian) {
n = (c & 0xff) << 16;
} else {
n = (c & 0xff) << 8;
}
filter->cache |= n;
filter->status++;
break;
default:
if (endian) {
n = (c & 0xff) << 24;
} else {
n = c & 0xff;
}
n |= filter->cache;
if ((n & 0xffff) == 0 && ((n >> 16) & 0xffff) == 0xfffe) {
if (endian) {
filter->status = 0; /* big-endian */
} else {
filter->status = 0x100; /* little-endian */
}
CK((*filter->output_function)(0xfeff, filter->data));
} else {
filter->status &= ~0xff;
CK((*filter->output_function)(n, filter->data));
}
break;
}
return c;
}
/*
* UCS-4BE => wchar
*/
int mbfl_filt_conv_ucs4be_wchar(int c, mbfl_convert_filter *filter)
{
int n;
if (filter->status == 0) {
filter->status = 1;
n = (c & 0xff) << 24;
filter->cache = n;
} else if (filter->status == 1) {
filter->status = 2;
n = (c & 0xff) << 16;
filter->cache |= n;
} else if (filter->status == 2) {
filter->status = 3;
n = (c & 0xff) << 8;
filter->cache |= n;
} else {
filter->status = 0;
n = (c & 0xff) | filter->cache;
CK((*filter->output_function)(n, filter->data));
}
return c;
}
/*
* wchar => UCS-4BE
*/
int mbfl_filt_conv_wchar_ucs4be(int c, mbfl_convert_filter *filter)
{
if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
CK((*filter->output_function)((c >> 24) & 0xff, filter->data));
CK((*filter->output_function)((c >> 16) & 0xff, filter->data));
CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
CK((*filter->output_function)(c & 0xff, filter->data));
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
/*
* UCS-4LE => wchar
*/
int mbfl_filt_conv_ucs4le_wchar(int c, mbfl_convert_filter *filter)
{
int n;
if (filter->status == 0) {
filter->status = 1;
n = (c & 0xff);
filter->cache = n;
} else if (filter->status == 1) {
filter->status = 2;
n = (c & 0xff) << 8;
filter->cache |= n;
} else if (filter->status == 2) {
filter->status = 3;
n = (c & 0xff) << 16;
filter->cache |= n;
} else {
filter->status = 0;
n = ((c & 0xff) << 24) | filter->cache;
CK((*filter->output_function)(n, filter->data));
}
return c;
}
/*
* wchar => UCS-4LE
*/
int mbfl_filt_conv_wchar_ucs4le(int c, mbfl_convert_filter *filter)
{
if (c >= 0 && c < MBFL_WCSGROUP_UCS4MAX) {
CK((*filter->output_function)(c & 0xff, filter->data));
CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
CK((*filter->output_function)((c >> 16) & 0xff, filter->data));
CK((*filter->output_function)((c >> 24) & 0xff, filter->data));
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}