/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- mbfl_filt_conv_euctw_wchar
- mbfl_filt_conv_wchar_euctw
- mbfl_filt_ident_euctw
/*
* "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: Rui Hirokawa <hirokawa@php.net>
*
*/
/*
* The source code included in this files was separated from mbfilter_tw.c
* by moriyoshi koizumi <moriyoshi@php.net> on 4 dec 2002.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_euc_tw.h"
#include "unicode_table_cns11643.h"
static int mbfl_filt_ident_euctw(int c, mbfl_identify_filter *filter);
static const unsigned char mblen_table_euctw[] = { /* 0xA1-0xFE */
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 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, 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, 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, 1
};
static const char *mbfl_encoding_euc_tw_aliases[] = {"EUC_TW", "eucTW", "x-euc-tw", NULL};
const mbfl_encoding mbfl_encoding_euc_tw = {
mbfl_no_encoding_euc_tw,
"EUC-TW",
"EUC-TW",
(const char *(*)[])&mbfl_encoding_euc_tw_aliases,
mblen_table_euctw,
MBFL_ENCTYPE_MBCS
};
const struct mbfl_identify_vtbl vtbl_identify_euctw = {
mbfl_no_encoding_euc_tw,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_euctw
};
const struct mbfl_convert_vtbl vtbl_euctw_wchar = {
mbfl_no_encoding_euc_tw,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_euctw_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_euctw = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_euc_tw,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_euctw,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* EUC-TW => wchar
*/
int
mbfl_filt_conv_euctw_wchar(int c, mbfl_convert_filter *filter)
{
int c1, s, w, plane;
switch (filter->status) {
case 0:
if (c >= 0 && c < 0x80) { /* latin */
CK((*filter->output_function)(c, filter->data));
} else if (c > 0xa0 && c < 0xff) { /* dbcs first byte */
filter->status = 1;
filter->cache = c;
} else if (c == 0x8e) { /* mbcs first byte */
filter->status = 2;
filter->cache = c;
} else {
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 1: /* mbcs second byte */
filter->status = 0;
c1 = filter->cache;
if (c > 0xa0 && c < 0xff) {
w = (c1 - 0xa1)*94 + (c - 0xa1);
if (w >= 0 && w < cns11643_1_ucs_table_size) {
w = cns11643_1_ucs_table[w];
} else {
w = 0;
}
if (w <= 0) {
w = (c1 << 8) | c;
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_CNS11643;
}
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: /* got 0x8e, first char */
c1 = filter->cache;
if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
CK((*filter->output_function)(c, filter->data));
filter->status = 0;
} else if (c > 0xa0 && c < 0xaf) {
filter->status = 3;
filter->cache = c - 0xa1;
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 3: /* got 0x8e, third char */
filter->status = 0;
c1 = filter->cache;
if ((c >= 0 && c < 0x21) || c == 0x7f) { /* CTLs */
CK((*filter->output_function)(c, filter->data));
filter->status = 0;
} else if (c > 0xa0 && c < 0xff) {
filter->status = 4;
filter->cache = (c1 << 8) + c - 0xa1;
} else {
w = (c1 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 4: /* mbcs fourth char */
filter->status = 0;
c1 = filter->cache;
if (c1 >= 0x100 && c1 <= 0xdff && c > 0xa0 && c < 0xff) {
plane = (c1 & 0xf00) >> 8;
s = (c1 & 0xff)*94 + c - 0xa1;
w = 0;
if (s >= 0) {
if (plane == 1 && s < cns11643_2_ucs_table_size) {
w = cns11643_2_ucs_table[s];
}
if (plane == 13 && s < cns11643_14_ucs_table_size) {
w = cns11643_14_ucs_table[s];
}
}
if (w <= 0) {
w = ((c1 & 0x7f) << 8) | (c & 0x7f);
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_CNS11643;
}
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 | 0x8e0000;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
default:
filter->status = 0;
break;
}
return c;
}
/*
* wchar => EUC-TW
*/
int
mbfl_filt_conv_wchar_euctw(int c, mbfl_convert_filter *filter)
{
int c1, s, plane;
s = 0;
if (c >= ucs_a1_cns11643_table_min && c < ucs_a1_cns11643_table_max) {
s = ucs_a1_cns11643_table[c - ucs_a1_cns11643_table_min];
} else if (c >= ucs_a2_cns11643_table_min && c < ucs_a2_cns11643_table_max) {
s = ucs_a2_cns11643_table[c - ucs_a2_cns11643_table_min];
} else if (c >= ucs_a3_cns11643_table_min && c < ucs_a3_cns11643_table_max) {
s = ucs_a3_cns11643_table[c - ucs_a3_cns11643_table_min];
} else if (c >= ucs_i_cns11643_table_min && c < ucs_i_cns11643_table_max) {
s = ucs_i_cns11643_table[c - ucs_i_cns11643_table_min];
} else if (c >= ucs_r_cns11643_table_min && c < ucs_r_cns11643_table_max) {
s = ucs_r_cns11643_table[c - ucs_r_cns11643_table_min];
}
if (s <= 0) {
c1 = c & ~MBFL_WCSPLANE_MASK;
if (c1 == MBFL_WCSPLANE_CNS11643) {
s = c & MBFL_WCSPLANE_MASK;
}
if (c == 0) {
s = 0;
} else if (s <= 0) {
s = -1;
}
}
if (s >= 0) {
plane = (s & 0x1f0000) >> 16;
if (plane <= 1){
if (s < 0x80) { /* latin */
CK((*filter->output_function)(s, filter->data));
} else {
s = (s & 0xffff) | 0x8080;
CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
CK((*filter->output_function)(s & 0xff, filter->data));
}
} else {
s = (0x8ea00000 + (plane << 16)) | ((s & 0xffff) | 0x8080);
CK((*filter->output_function)(0x8e , filter->data));
CK((*filter->output_function)((s >> 16) & 0xff, filter->data));
CK((*filter->output_function)((s >> 8) & 0xff, filter->data));
CK((*filter->output_function)(s & 0xff, 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_euctw(int c, mbfl_identify_filter *filter)
{
switch (filter->status) {
case 0: /* latin */
if (c >= 0 && c < 0x80) { /* ok */
;
} else if (c > 0xa0 && c < 0xff) { /* DBCS lead byte */
filter->status = 1;
} else if (c == 0x8e) { /* DBCS lead byte */
filter->status = 2;
} else { /* bad */
filter->flag = 1;
}
break;
case 1: /* got lead byte */
if (c < 0xa1 || c > 0xfe) { /* bad */
filter->flag = 1;
}
filter->status = 0;
break;
case 2: /* got lead byte */
if (c >= 0xa1 && c < 0xaf) { /* ok */
filter->status = 3;
} else {
filter->flag = 1; /* bad */
}
break;
case 3: /* got lead byte */
if (c < 0xa1 || c > 0xfe) { /* bad */
filter->flag = 1;
}
filter->status = 4;
break;
case 4: /* got lead byte */
if (c < 0xa1 || c > 0xfe) { /* bad */
filter->flag = 1;
}
filter->status = 0;
break;
default:
filter->status = 0;
break;
}
return c;
}