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DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_hz_wchar
- mbfl_filt_conv_wchar_hz
- mbfl_filt_conv_any_hz_flush
- mbfl_filt_ident_hz
/*
* "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_cn.c
* by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_hz.h"
#include "unicode_table_cp936.h"
static int mbfl_filt_ident_hz(int c, mbfl_identify_filter *filter);
const mbfl_encoding mbfl_encoding_hz = {
mbfl_no_encoding_hz,
"HZ",
"HZ-GB-2312",
NULL,
NULL,
MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_SHFTCODE
};
const struct mbfl_identify_vtbl vtbl_identify_hz = {
mbfl_no_encoding_hz,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_hz
};
const struct mbfl_convert_vtbl vtbl_hz_wchar = {
mbfl_no_encoding_hz,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_hz_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_hz = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_hz,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_hz,
mbfl_filt_conv_any_hz_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* HZ => wchar
*/
int
mbfl_filt_conv_hz_wchar(int c, mbfl_convert_filter *filter)
{
int c1, s, w;
switch (filter->status & 0xf) {
/* case 0x00: ASCII */
/* case 0x10: GB2312 */
case 0:
if (c == 0x7e) {
filter->status += 2;
} else if (filter->status == 0x10 && c > 0x20 && c < 0x7f) { /* DBCS first char */
filter->cache = c;
filter->status += 1;
} else if (c >= 0 && c < 0x80) { /* latin, CTLs */
CK((*filter->output_function)(c, filter->data));
} else {
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
/* case 0x11: GB2312 second char */
case 1:
filter->status &= ~0xf;
c1 = filter->cache;
if (c1 > 0x20 && c1 < 0x7f && c > 0x20 && c < 0x7f) {
s = (c1 - 1)*192 + c + 0x40; /* GB2312 */
if (s >= 0 && s < cp936_ucs_table_size) {
w = cp936_ucs_table[s];
} else {
w = 0;
}
if (w <= 0) {
w = (c1 << 8) | c;
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_GB2312;
}
CK((*filter->output_function)(w, filter->data));
} else if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
CK((*filter->output_function)(c, filter->data));
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
/* '~' */
case 2:
if (c == 0x7d) { /* '}' */
filter->status = 0x0;
} else if (c == 0x7b) { /* '{' */
filter->status = 0x10;
} else if (c == 0x7e) { /* '~' */
filter->status = 0x0;
CK((*filter->output_function)(0x007e, filter->data));
}
break;
default:
filter->status = 0;
break;
}
return c;
}
/*
* wchar => HZ
*/
int
mbfl_filt_conv_wchar_hz(int c, mbfl_convert_filter *filter)
{
int s;
s = 0;
if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
s = ucs_a1_cp936_table[c - ucs_a1_cp936_table_min];
} else if (c >= ucs_a2_cp936_table_min && c < ucs_a2_cp936_table_max) {
s = ucs_a2_cp936_table[c - ucs_a2_cp936_table_min];
} else if (c >= ucs_a3_cp936_table_min && c < ucs_a3_cp936_table_max) {
s = ucs_a3_cp936_table[c - ucs_a3_cp936_table_min];
} else if (c >= ucs_i_cp936_table_min && c < ucs_i_cp936_table_max) {
s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
} else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
s = ucs_hff_cp936_table[c - ucs_hff_cp936_table_min];
}
if (s & 0x8000) {
s -= 0x8080;
}
if (s <= 0) {
if (c == 0) {
s = 0;
} else if (s <= 0) {
s = -1;
}
} else if ((s >= 0x80 && s < 0x2121) || (s > 0x8080)) {
s = -1;
}
if (s >= 0) {
if (s < 0x80) { /* ASCII */
if ((filter->status & 0xff00) != 0) {
CK((*filter->output_function)(0x7e, filter->data)); /* '~' */
CK((*filter->output_function)(0x7d, filter->data)); /* '}' */
}
filter->status = 0;
if (s == 0x7e){
CK((*filter->output_function)(0x7e, filter->data));
}
CK((*filter->output_function)(s, filter->data));
} else { /* GB 2312-80 */
if ((filter->status & 0xff00) != 0x200) {
CK((*filter->output_function)(0x7e, filter->data)); /* '~' */
CK((*filter->output_function)(0x7b, filter->data)); /* '{' */
}
filter->status = 0x200;
CK((*filter->output_function)((s >> 8) & 0x7f, filter->data));
CK((*filter->output_function)(s & 0x7f, filter->data));
}
} else {
if (filter->illegal_mode != MBFL_OUTPUTFILTER_ILLEGAL_MODE_NONE) {
CK(mbfl_filt_conv_illegal_output(c, filter));
}
}
return c;
}
int
mbfl_filt_conv_any_hz_flush(mbfl_convert_filter *filter)
{
/* back to latin */
if ((filter->status & 0xff00) != 0) {
CK((*filter->output_function)(0x7e, filter->data)); /* ~ */
CK((*filter->output_function)(0x7d, filter->data)); /* '{' */
}
filter->status &= 0xff;
return 0;
}
static int mbfl_filt_ident_hz(int c, mbfl_identify_filter *filter)
{
switch (filter->status & 0xf) {
/* case 0x00: ASCII */
/* case 0x10: GB2312 */
case 0:
if (c == 0x7e) {
filter->status += 2;
} else if (filter->status == 0x10 && c > 0x20 && c < 0x7f) { /* DBCS first char */
filter->status += 1;
} else if (c >= 0 && c < 0x80) { /* latin, CTLs */
;
} else {
filter->flag = 1; /* bad */
}
break;
/* case 0x11: GB2312 second char */
case 1:
filter->status &= ~0xf;
if (c < 0x21 || c > 0x7e) { /* bad */
filter->flag = 1;
}
break;
case 2:
if (c == 0x7d) { /* '}' */
filter->status = 0;
} else if (c == 0x7b) { /* '{' */
filter->status = 0x10;
} else if (c == 0x7e) { /* '~' */
filter->status = 0;
} else {
filter->flag = 1; /* bad */
filter->status &= ~0xf;
}
break;
default:
filter->status = 0;
break;
}
return c;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
*/