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DEFINITIONS
This source file includes following definitions.
- mbfl_bisec_srch
- mbfl_bisec_srch2
- mbfl_filt_conv_gb18030_wchar
- mbfl_filt_conv_wchar_gb18030
- mbfl_filt_ident_gb18030
/*
* "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_cp936.c
* by rui hirokawa <hirokawa@php.net> on 11 Aug 2011.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mbfilter.h"
#include "mbfilter_gb18030.h"
#include "unicode_table_cp936.h"
#include "unicode_table_gb18030.h"
static int mbfl_filt_ident_gb18030(int c, mbfl_identify_filter *filter);
static const char *mbfl_encoding_gb18030_aliases[] = {"gb-18030", "gb-18030-2000", NULL};
const mbfl_encoding mbfl_encoding_gb18030 = {
mbfl_no_encoding_gb18030,
"GB18030",
"GB18030",
(const char *(*)[])&mbfl_encoding_gb18030_aliases,
NULL,
MBFL_ENCTYPE_MBCS | MBFL_ENCTYPE_GL_UNSAFE
};
const struct mbfl_identify_vtbl vtbl_identify_gb18030 = {
mbfl_no_encoding_gb18030,
mbfl_filt_ident_common_ctor,
mbfl_filt_ident_common_dtor,
mbfl_filt_ident_gb18030
};
const struct mbfl_convert_vtbl vtbl_gb18030_wchar = {
mbfl_no_encoding_gb18030,
mbfl_no_encoding_wchar,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_gb18030_wchar,
mbfl_filt_conv_common_flush
};
const struct mbfl_convert_vtbl vtbl_wchar_gb18030 = {
mbfl_no_encoding_wchar,
mbfl_no_encoding_gb18030,
mbfl_filt_conv_common_ctor,
mbfl_filt_conv_common_dtor,
mbfl_filt_conv_wchar_gb18030,
mbfl_filt_conv_common_flush
};
#define CK(statement) do { if ((statement) < 0) return (-1); } while (0)
int
mbfl_bisec_srch(int w, const unsigned short *tbl, int n)
{
int k, k1 = 0, k2 = n-1;
while (k1 < k2) {
k = (k1+k2) >> 1;
if (w <= tbl[2*k+1]) {
k2 = k;
} else if (w >= tbl[2*k+2]) {
k1 = k + 1;
} else {
return -1;
}
}
return k1;
}
int
mbfl_bisec_srch2(int w, const unsigned short tbl[], int n)
{
int k, k1 = 0, k2 = n;
if (w == tbl[0]) {
return 0;
}
while (k2 - k1 > 1) {
k = (k1 + k2) >> 1;
if (w < tbl[k]) {
k2 = k;
} else if (w > tbl[k]) {
k1 = k;
} else {
return k;
}
}
return -1;
}
/*
* GB18030 => wchar
*/
int
mbfl_filt_conv_gb18030_wchar(int c, mbfl_convert_filter *filter)
{
int k;
int c1, c2, c3, 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) {
CK((*filter->output_function)(0x00ff, filter->data));
} else if (c > 0x80 && c < 0xff) { /* dbcs/qbcs lead byte */
filter->status = 1;
filter->cache = c;
} else {
w = c & MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 1: /* dbcs/qbcs second byte */
c1 = filter->cache;
filter->status = 0;
if (c1 >= 0x81 && c1 <= 0x84 && c >= 0x30 && c <= 0x39) { /* 4 byte range: Unicode BMP */
filter->status = 2;
filter->cache = (c1 << 8) | c;
return c;
} else if (c1 >= 0x90 && c1 <= 0xe3 && c >= 0x30 && c <= 0x39) {
/* 4 byte range: Unicode 16 planes */
filter->status = 2;
filter->cache = (c1 << 8) | c;
return c;
} else 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_gb18030_pua_tbl_max; k++) {
if (c2 >= mbfl_gb18030_pua_tbl[k][2] &&
c2 <= mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][1]
- mbfl_gb18030_pua_tbl[k][0]) {
w = c2 - mbfl_gb18030_pua_tbl[k][2] + mbfl_gb18030_pua_tbl[k][0];
CK((*filter->output_function)(w, filter->data));
break;
}
}
}
if (w <= 0) {
if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
(c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
(c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
(c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
(c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && 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_GB18030;
}
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: /* qbcs third byte */
c1 = (filter->cache >> 8) & 0xff;
c2 = filter->cache & 0xff;
filter->status = 0;
filter->cache = 0;
if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
c2 >= 0x30 && c2 <= 0x39 && c >= 0x81 && c <= 0xfe) {
filter->cache = (c1 << 16) | (c2 << 8) | c;
filter->status = 3;
} else {
w = (c1 << 16) | (c2 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
}
break;
case 3: /* qbcs fourth byte */
c1 = (filter->cache >> 16) & 0xff;
c2 = (filter->cache >> 8) & 0xff;
c3 = filter->cache & 0xff;
filter->status = 0;
filter->cache = 0;
if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) &&
c2 >= 0x30 && c2 <= 0x39 && c3 >= 0x81 && c3 <= 0xfe && c >= 0x30 && c <= 0x39) {
if (c1 >= 0x90 && c1 <= 0xe3) {
w = ((((c1 - 0x90)*10 + (c2 - 0x30))*126 + (c3 - 0x81)))*10 + (c - 0x30) + 0x10000;
} else { /* Unicode BMP */
w = (((c1 - 0x81)*10 + (c2 - 0x30))*126 + (c3 - 0x81))*10 + (c - 0x30);
if (w >= 0 && w <= 39419) {
k = mbfl_bisec_srch(w, mbfl_gb2uni_tbl, mbfl_gb_uni_max);
if (k<0) {
/* error */
w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
return c;
}
w += mbfl_gb_uni_ofst[k];
} else {
w = (c1 << 24) | (c2 << 16) | (c3 << 8) | c;
w &= MBFL_WCSGROUP_MASK;
w |= MBFL_WCSGROUP_THROUGH;
CK((*filter->output_function)(w, filter->data));
return c;
}
}
CK((*filter->output_function)(w, filter->data));
} else {
w = (c1 << 24) | (c2 << 16) | (c3 << 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 => GB18030
*/
int
mbfl_filt_conv_wchar_gb18030(int c, mbfl_convert_filter *filter)
{
int k, k1, k2;
int c1, s = 0, s1 = 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_ci_cp936_table_min && c < ucs_ci_cp936_table_max) {
/* U+F900-FA2F CJK Compatibility Ideographs */
if (c == 0xf92c) {
s = 0xfd9c;
} else if (c == 0xf979) {
s = 0xfd9d;
} else if (c == 0xf995) {
s = 0xfd9e;
} else if (c == 0xf9e7) {
s = 0xfd9f;
} else if (c == 0xf9f1) {
s = 0xfda0;
} else if (c >= 0xfa0c && c <= 0xfa29) {
s = ucs_ci_s_cp936_table[c - 0xfa0c];
}
} else if (c >= ucs_cf_cp936_table_min && c < ucs_cf_cp936_table_max) {
/* FE30h CJK Compatibility Forms */
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) {
/* U+FE50-FE6F Small Form Variants */
s = ucs_sfv_cp936_table[c - ucs_sfv_cp936_table_min];
} 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 (c == 0x20ac) { /* euro-sign */
s = 0xa2e3;
}
if (s <= 0 && c >= mbfl_gb18030_c_tbl_key[0] &&
c <= mbfl_gb18030_c_tbl_key[mbfl_gb18030_c_tbl_max-1]) {
k1 = mbfl_bisec_srch2(c, mbfl_gb18030_c_tbl_key, mbfl_gb18030_c_tbl_max);
if (k1 >= 0) {
s = mbfl_gb18030_c_tbl_val[k1];
}
}
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_gb18030_pua_tbl_max;
while (k1 < k2) {
k = (k1 + k2) >> 1;
if (c < mbfl_gb18030_pua_tbl[k][0]) {
k2 = k;
} else if (c > mbfl_gb18030_pua_tbl[k][1]) {
k1 = k + 1;
} else {
s = c - mbfl_gb18030_pua_tbl[k][0] + mbfl_gb18030_pua_tbl[k][2];
break;
}
}
}
}
if (s <= 0 && c >= 0x0080 && c <= 0xffff) { /* BMP */
s = mbfl_bisec_srch(c, mbfl_uni2gb_tbl, mbfl_gb_uni_max);
if (s >= 0) {
c1 = c - mbfl_gb_uni_ofst[s];
s = (c1 % 10) + 0x30; c1 /= 10;
s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
s1 = c1 + 0x81;
}
} else if (c >= 0x10000 && c <= 0x10ffff) { /* Code set 3: Unicode U+10000..U+10FFFF */
c1 = c - 0x10000;
s = (c1 % 10) + 0x30; c1 /= 10;
s |= ((c1 % 126) + 0x81) << 8; c1 /= 126;
s |= ((c1 % 10) + 0x30) << 16; c1 /= 10;
s1 = c1 + 0x90;
}
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) { /* latin */
CK((*filter->output_function)(s, filter->data));
} else if (s1 > 0) { /* qbcs */
CK((*filter->output_function)(s1 & 0xff, 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 { /* dbcs */
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_gb18030(int c, mbfl_identify_filter *filter)
{
int c1;
c1 = (filter->status >> 8) & 0xff;
filter->status &= 0xff;
if (filter->status == 0) {
if (c <= 0x80 || c == 0xff) {
filter->status = 0;
} else {
filter->status = 1;
filter->status |= (c << 8);
}
} else if (filter->status == 1) { /* dbcs/qbcs 2nd byte */
if (((c1 >= 0x81 && c1 <= 0x84) || (c1 >= 0x90 && c1 <= 0xe3)) && c >= 0x30 && c <= 0x39) { /* qbcs */
filter->status = 2;
} else if (((c1 >= 0xaa && c1 <= 0xaf) || (c1 >= 0xf8 && c1 <= 0xfe)) && (c >= 0xa1 && c <= 0xfe)) {
filter->status = 0; /* UDA part 1,2 */
} else if (c1 >= 0xa1 && c1 <= 0xa7 && c >= 0x40 && c < 0xa1 && c != 0x7f) {
filter->status = 0; /* UDA part 3 */
} else if ((c1 >= 0xa1 && c1 <= 0xa9 && c >= 0xa1 && c <= 0xfe) ||
(c1 >= 0xb0 && c1 <= 0xf7 && c >= 0xa1 && c <= 0xfe) ||
(c1 >= 0x81 && c1 <= 0xa0 && c >= 0x40 && c <= 0xfe && c != 0x7f) ||
(c1 >= 0xaa && c1 <= 0xfe && c >= 0x40 && c <= 0xa0 && c != 0x7f) ||
(c1 >= 0xa8 && c1 <= 0xa9 && c >= 0x40 && c <= 0xa0 && c != 0x7f)) {
filter->status = 0; /* DBCS */
} else {
filter->flag = 1; /* bad */
filter->status = 0;
}
} else if (filter->status == 2) { /* qbcs 3rd byte */
if (c > 0x80 && c < 0xff) {
filter->status = 3;
} else {
filter->flag = 1; /* bad */
filter->status = 0;
}
} else if (filter->status == 3) { /* qbcs 4th byte */
if (c >= 0x30 && c < 0x40) {
filter->status = 0;
} else {
filter->flag = 1; /* bad */
filter->status = 0;
}
} else { /* bad */
filter->flag = 1;
}
return c;
}