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DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_utf16_wchar
- mbfl_filt_conv_utf16be_wchar
- mbfl_filt_conv_wchar_utf16be
- mbfl_filt_conv_utf16le_wchar
- mbfl_filt_conv_wchar_utf16le
/*
* "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_utf16.h"
static const char *mbfl_encoding_utf16_aliases[] = {"utf16", NULL};
const mbfl_encoding mbfl_encoding_utf16 = {
mbfl_no_encoding_utf16,
"UTF-16",
"UTF-16",
(const char *(*)[])&mbfl_encoding_utf16_aliases,
NULL,
MBFL_ENCTYPE_MWC2BE
};
const mbfl_encoding mbfl_encoding_utf16be = {
mbfl_no_encoding_utf16be,
"UTF-16BE",
"UTF-16BE",
NULL,
NULL,
MBFL_ENCTYPE_MWC2BE
};
const mbfl_encoding mbfl_encoding_utf16le = {
mbfl_no_encoding_utf16le,
"UTF-16LE",
"UTF-16LE",
NULL,
NULL,
MBFL_ENCTYPE_MWC2LE
};
const struct mbfl_convert_vtbl vtbl_utf16_wchar = {
mbfl_no_encoding_utf16,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_utf16_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_utf16 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_utf16,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_utf16be,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_utf16be_wchar = {
mbfl_no_encoding_utf16be,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_utf16be_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_utf16be = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_utf16be,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_utf16be,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_utf16le_wchar = {
mbfl_no_encoding_utf16le,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_utf16le_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_utf16le = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_utf16le,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_utf16le,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* UTF-16 => wchar
*/
int mbfl_filt_conv_utf16_wchar(int c, mbfl_convert_filter *filter)
{
int n, endian;
endian = filter->status & 0xff00;
switch (filter->status & 0x0f) {
case 0:
if (endian) {
n = c & 0xff;
} else {
n = (c & 0xff) << 8;
}
filter->cache |= n;
filter->status++;
break;
default:
if (endian) {
n = (c & 0xff) << 8;
} else {
n = c & 0xff;
}
n |= filter->cache & 0xffff;
filter->status &= ~0x0f;
if (n >= 0xd800 && n < 0xdc00) {
filter->cache = ((n & 0x3ff) << 16) + 0x400000;
} else if (n >= 0xdc00 && n < 0xe000) {
n &= 0x3ff;
n |= (filter->cache & 0xfff0000) >> 6;
filter->cache = 0;
if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
CK((*filter->output_function)(n, filter->data));
} else { /* illegal character */
n &= MBFL_WCSGROUP_MASK;
n |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(n, filter->data));
}
} else {
int is_first = filter->status & 0x10;
filter->cache = 0;
filter->status |= 0x10;
if (!is_first) {
if (n == 0xfffe) {
if (endian) {
filter->status &= ~0x100; /* big-endian */
} else {
filter->status |= 0x100; /* little-endian */
}
break;
} else if (n == 0xfeff) {
break;
}
}
CK((*filter->output_function)(n, filter->data));
}
break;
}
return c;
}
/*
* UTF-16BE => wchar
*/
int mbfl_filt_conv_utf16be_wchar(int c, mbfl_convert_filter *filter)
{
int n;
switch (filter->status) {
case 0:
filter->status = 1;
n = (c & 0xff) << 8;
filter->cache |= n;
break;
default:
filter->status = 0;
n = (filter->cache & 0xff00) | (c & 0xff);
if (n >= 0xd800 && n < 0xdc00) {
filter->cache = ((n & 0x3ff) << 16) + 0x400000;
} else if (n >= 0xdc00 && n < 0xe000) {
n &= 0x3ff;
n |= (filter->cache & 0xfff0000) >> 6;
filter->cache = 0;
if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
CK((*filter->output_function)(n, filter->data));
} else { /* illegal character */
n &= MBFL_WCSGROUP_MASK;
n |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(n, filter->data));
}
} else {
filter->cache = 0;
CK((*filter->output_function)(n, filter->data));
}
break;
}
return c;
}
/*
* wchar => UTF-16BE
*/
int mbfl_filt_conv_wchar_utf16be(int c, mbfl_convert_filter *filter)
{
int n;
if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
CK((*filter->output_function)(c & 0xff, filter->data));
} else if (c >= MBFL_WCSPLANE_SUPMIN && c < MBFL_WCSPLANE_SUPMAX) {
n = ((c >> 10) - 0x40) | 0xd800;
CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
CK((*filter->output_function)(n & 0xff, filter->data));
n = (c & 0x3ff) | 0xdc00;
CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
CK((*filter->output_function)(n & 0xff, filter->data));
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
/*
* UTF-16LE => wchar
*/
int mbfl_filt_conv_utf16le_wchar(int c, mbfl_convert_filter *filter)
{
int n;
switch (filter->status) {
case 0:
filter->status = 1;
n = c & 0xff;
filter->cache |= n;
break;
default:
filter->status = 0;
n = (filter->cache & 0xff) | ((c & 0xff) << 8);
if (n >= 0xd800 && n < 0xdc00) {
filter->cache = ((n & 0x3ff) << 16) + 0x400000;
} else if (n >= 0xdc00 && n < 0xe000) {
n &= 0x3ff;
n |= (filter->cache & 0xfff0000) >> 6;
filter->cache = 0;
if (n >= MBFL_WCSPLANE_SUPMIN && n < MBFL_WCSPLANE_SUPMAX) {
CK((*filter->output_function)(n, filter->data));
} else { /* illegal character */
n &= MBFL_WCSGROUP_MASK;
n |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(n, filter->data));
}
} else {
filter->cache = 0;
CK((*filter->output_function)(n, filter->data));
}
break;
}
return c;
}
/*
* wchar => UTF-16LE
*/
int mbfl_filt_conv_wchar_utf16le(int c, mbfl_convert_filter *filter)
{
int n;
if (c >= 0 && c < MBFL_WCSPLANE_UCS2MAX) {
CK((*filter->output_function)(c & 0xff, filter->data));
CK((*filter->output_function)((c >> 8) & 0xff, filter->data));
} else if (c >= MBFL_WCSPLANE_SUPMIN && c < MBFL_WCSPLANE_SUPMAX) {
n = ((c >> 10) - 0x40) | 0xd800;
CK((*filter->output_function)(n & 0xff, filter->data));
CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
n = (c & 0x3ff) | 0xdc00;
CK((*filter->output_function)(n & 0xff, filter->data));
CK((*filter->output_function)((n >> 8) & 0xff, filter->data));
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}