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mbfilter_cp936.c
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Tue May 29 12:34:40 2012 UTC (12 years, 2 months ago) by
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CVS tags:
v5_4_3elwix,
v5_4_29p0,
v5_4_29,
v5_4_20p0,
v5_4_20,
v5_4_17p0,
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php 5.4.3+patches
/*
* "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_cp936.h"
#define UNICODE_TABLE_CP936_DEF
#include "unicode_table_cp936.h"
static int mbfl_filt_ident_cp936(int c, mbfl_identify_filter *filter);
static const unsigned char mblen_table_cp936[] = { /* 0x81-0xFE */
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, 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, 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_cp936_aliases[] = {"CP-936", "GBK", NULL};
const mbfl_encoding mbfl_encoding_cp936 = {
mbfl_no_encoding_cp936,
"CP936",
"CP936",
(const char *(*)[])&mbfl_encoding_cp936_aliases,
mblen_table_cp936,
MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
};
const struct mbfl_identify_vtbl vtbl_identify_cp936 = {
mbfl_no_encoding_cp936,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_cp936
};
const struct mbfl_convert_vtbl vtbl_cp936_wchar = {
mbfl_no_encoding_cp936,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_cp936_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_cp936 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_cp936,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_cp936,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
/*
* CP936 => wchar
*/
int
mbfl_filt_conv_cp936_wchar(int c, mbfl_convert_filter *filter)
{
int k;
int c1, c2, w = -1;
switch (filter->status) {
case 0:
if (c >= 0 && c < 0x80) { /* latin */
CK((*filter->output_function)(c, filter->data));
} else if (c == 0x80) { /* euro sign */
CK((*filter->output_function)(0x20ac, filter->data));
} else if (c < 0xff) { /* dbcs lead byte */
filter->status = 1;
filter->cache = c;
} else { /* 0xff */
CK((*filter->output_function)(0xf8f5, filter->data));
}
break;
case 1: /* dbcs second byte */
filter->status = 0;
c1 = filter->cache;
if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) &&
(c >= 0xa1 && c <= 0xfe)) {
/* UDA part1,2: U+E000-U+E4C5 */
w = 94*(c1 >= 0xf8 ? c1 - 0xf2 : c1 - 0xaa) + (c - 0xa1) + 0xe000;
CK((*filter->output_function)(w, filter->data));
} else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
/* UDA part3 : U+E4C6-U+E765*/
w = 96*(c1 - 0xa1) + c - (c >= 0x80 ? 0x41 : 0x40) + 0xe4c6;
CK((*filter->output_function)(w, filter->data));
}
c2 = (c1 << 8) | c;
if (w <= 0 &&
((c2 >= 0xa2ab && c2 <= 0xa9f0 + (0xe80f-0xe801)) ||
(c2 >= 0xd7fa && c2 <= 0xd7fa + (0xe814-0xe810)) ||
(c2 >= 0xfe50 && c2 <= 0xfe80 + (0xe864-0xe844)))) {
for (k = 0; k < mbfl_cp936_pua_tbl_max; k++) {
if (c2 >= mbfl_cp936_pua_tbl[k][2] &&
c2 <= mbfl_cp936_pua_tbl[k][2] +
mbfl_cp936_pua_tbl[k][1] - mbfl_cp936_pua_tbl[k][0]) {
w = c2 - mbfl_cp936_pua_tbl[k][2] + mbfl_cp936_pua_tbl[k][0];
CK((*filter->output_function)(w, filter->data));
break;
}
}
}
if (w <= 0) {
if (c1 < 0xff && c1 > 0x80 && c > 0x39 && c < 0xff && c != 0x7f) {
w = (c1 - 0x81)*192 + (c - 0x40);
if (w >= 0 && w < cp936_ucs_table_size) {
w = cp936_ucs_table[w];
} else {
w = 0;
}
if (w <= 0) {
w = (c1 << 8) | c;
w &= MBFL_WCSPLANE_MASK;
w |= MBFL_WCSPLANE_WINCP936;
}
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;
default:
filter->status = 0;
break;
}
return c;
}
/*
* wchar => CP936
*/
int
mbfl_filt_conv_wchar_cp936(int c, mbfl_convert_filter *filter)
{
int k, k1, k2;
int c1, s = 0;
if (c >= ucs_a1_cp936_table_min && c < ucs_a1_cp936_table_max) {
/* U+0000 - U+0451 */
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) {
/* U+2000 - U+26FF */
if (c == 0x203e) {
s = 0xa3fe;
} else if (c == 0x2218) {
s = 0xa1e3;
} else if (c == 0x223c) {
s = 0xa1ab;
} else {
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) {
/* U+2F00 - U+33FF */
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) {
/* U+4D00-9FFF CJK Unified Ideographs (+ Extension A) */
s = ucs_i_cp936_table[c - ucs_i_cp936_table_min];
} else if (c >= 0xe000 && c <= 0xe864) { /* PUA */
if (c < 0xe766) {
if (c < 0xe4c6) {
c1 = c - 0xe000;
s = (c1 % 94) + 0xa1; c1 /= 94;
s |= (c1 < 0x06 ? c1 + 0xaa : c1 + 0xf2) << 8;
} else {
c1 = c - 0xe4c6;
s = ((c1 / 96) + 0xa1) << 8; c1 %= 96;
s |= c1 + (c1 >= 0x3f ? 0x41 : 0x40);
}
} else {
/* U+E766..U+E864 */
k1 = 0; k2 = mbfl_cp936_pua_tbl_max;
while (k1 < k2) {
k = (k1 + k2) >> 1;
if (c < mbfl_cp936_pua_tbl[k][0]) {
k2 = k;
} else if (c > mbfl_cp936_pua_tbl[k][1]) {
k1 = k + 1;
} else {
s = c - mbfl_cp936_pua_tbl[k][0] + mbfl_cp936_pua_tbl[k][2];
break;
}
}
}
} else if (c == 0xf8f5) {
s = 0xff;
} else if (c >= ucs_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
/* U+F900-FA2F CJK Compatibility Ideographs */
s = ucs_ci_cp936_table[c - ucs_ci_cp936_table_min];
} else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
s = ucs_cf_cp936_table[c - ucs_cf_cp936_table_min];
} else if (c >= ucs_sfv_cp936_table_min && c < ucs_sfv_cp936_table_max) {
s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min]; /* U+FE50-FE6F Small Form Variants */
} else if (c >= ucs_hff_cp936_table_min && c < ucs_hff_cp936_table_max) {
/* U+FF00-FFFF HW/FW Forms */
if (c == 0xff04) {
s = 0xa1e7;
} else if (c == 0xff5e) {
s = 0xa1ab;
} else if (c >= 0xff01 && c <= 0xff5d) {
s = c - 0xff01 + 0xa3a1;
} else if (c >= 0xffe0 && c <= 0xffe5) {
s = ucs_hff_s_cp936_table[c-0xffe0];
}
}
if (s <= 0) {
c1 = c & ~MBFL_WCSPLANE_MASK;
if (c1 == MBFL_WCSPLANE_WINCP936) {
s = c & MBFL_WCSPLANE_MASK;
}
if (c == 0) {
s = 0;
} else if (s <= 0) {
s = -1;
}
}
if (s >= 0) {
if (s <= 0x80 || s == 0xff) { /* latin */
CK((*filter->output_function)(s, filter->data));
} else {
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_cp936(int c, mbfl_identify_filter *filter)
{
if (filter->status) { /* kanji second char */
if (c < 0x40 || c > 0xfe || c == 0x7f) { /* bad */
filter->flag = 1;
}
filter->status = 0;
} else if (c >= 0 && c < 0x80) { /* latin ok */
;
} else if (c > 0x80 && c < 0xff) { /* DBCS lead byte */
filter->status = 1;
} else { /* bad */
filter->flag = 1;
}
return c;
}
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