170 lines
4.6 KiB
C
Executable File
170 lines
4.6 KiB
C
Executable File
/*
|
|
* Copyright (C) 1999-2001, 2005, 2008 Free Software Foundation, Inc.
|
|
* This file is part of the GNU LIBICONV Library.
|
|
*
|
|
* The GNU LIBICONV Library is free software; you can redistribute it
|
|
* and/or modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* The GNU LIBICONV Library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with the GNU LIBICONV Library; see the file COPYING.LIB.
|
|
* If not, write to the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
/*
|
|
* GBK
|
|
*/
|
|
|
|
/*
|
|
* GBK, as described in Ken Lunde's book, is an extension of GB 2312-1980
|
|
* (shifted by adding 0x8080 to the range 0xA1A1..0xFEFE, as used in EUC-CN).
|
|
* It adds the following ranges:
|
|
*
|
|
* (part of GBK/1) 0xA2A1-0xA2AA Small Roman numerals
|
|
* GBK/3 0x{81-A0}{40-7E,80-FE} 6080 new characters, all in Unicode
|
|
* GBK/4 0x{AA-FE}{40-7E,80-A0} 8160 new characters, 8080 in Unicode
|
|
* GBK/5 0x{A8-A9}{40-7E,80-A0} 166 new characters, 153 in Unicode
|
|
*
|
|
* Furthermore, all four tables I have looked at
|
|
* - the CP936 table by Microsoft, found on ftp.unicode.org in 1999,
|
|
* - the GBK table by Sun, investigated on a Solaris 2.7 machine,
|
|
* - the GBK tables by CWEX, found in the Big5+ package,
|
|
* - the GB18030 standard (second printing),
|
|
* agree in the following extensions. (Ken Lunde must have overlooked these
|
|
* differences between GB2312 and GBK. Also, the CWEX tables have additional
|
|
* differences.)
|
|
*
|
|
* 1. Some characters in the GB2312 range are defined differently:
|
|
*
|
|
* code GB2312 GBK
|
|
* 0xA1A4 0x30FB # KATAKANA MIDDLE DOT 0x00B7 # MIDDLE DOT
|
|
* 0xA1AA 0x2015 # HORIZONTAL BAR 0x2014 # EM DASH
|
|
*
|
|
* 2. 19 characters added in the range 0xA6E0-0xA6F5.
|
|
*
|
|
* 3. 4 characters added in the range 0xA8BB-0xA8C0.
|
|
*
|
|
* CP936 as of 1999 was identical to GBK. However, since 1999, Microsoft has
|
|
* added new mappings to CP936...
|
|
*/
|
|
|
|
#include "gbkext1.h"
|
|
#include "gbkext2.h"
|
|
#include "gbkext_inv.h"
|
|
#include "cp936ext.h"
|
|
|
|
static int
|
|
gbk_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
|
|
{
|
|
unsigned char c = *s;
|
|
|
|
if (c >= 0x81 && c < 0xff) {
|
|
if (n < 2)
|
|
return RET_TOOFEW(0);
|
|
if (c >= 0xa1 && c <= 0xf7) {
|
|
unsigned char c2 = s[1];
|
|
if (c == 0xa1) {
|
|
if (c2 == 0xa4) {
|
|
*pwc = 0x00b7;
|
|
return 2;
|
|
}
|
|
if (c2 == 0xaa) {
|
|
*pwc = 0x2014;
|
|
return 2;
|
|
}
|
|
}
|
|
if (c2 >= 0xa1 && c2 < 0xff) {
|
|
unsigned char buf[2];
|
|
int ret;
|
|
buf[0] = c-0x80; buf[1] = c2-0x80;
|
|
ret = gb2312_mbtowc(conv,pwc,buf,2);
|
|
if (ret != RET_ILSEQ)
|
|
return ret;
|
|
buf[0] = c; buf[1] = c2;
|
|
ret = cp936ext_mbtowc(conv,pwc,buf,2);
|
|
if (ret != RET_ILSEQ)
|
|
return ret;
|
|
}
|
|
}
|
|
if (c >= 0x81 && c <= 0xa0)
|
|
return gbkext1_mbtowc(conv,pwc,s,2);
|
|
if (c >= 0xa8 && c <= 0xfe)
|
|
return gbkext2_mbtowc(conv,pwc,s,2);
|
|
if (c == 0xa2) {
|
|
unsigned char c2 = s[1];
|
|
if (c2 >= 0xa1 && c2 <= 0xaa) {
|
|
*pwc = 0x2170+(c2-0xa1);
|
|
return 2;
|
|
}
|
|
}
|
|
}
|
|
return RET_ILSEQ;
|
|
}
|
|
|
|
static int
|
|
gbk_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
|
|
{
|
|
unsigned char buf[2];
|
|
int ret;
|
|
|
|
if (wc != 0x30fb && wc != 0x2015) {
|
|
ret = gb2312_wctomb(conv,buf,wc,2);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 2) abort();
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = buf[0]+0x80;
|
|
r[1] = buf[1]+0x80;
|
|
return 2;
|
|
}
|
|
}
|
|
ret = gbkext_inv_wctomb(conv,buf,wc,2);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 2) abort();
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = buf[0];
|
|
r[1] = buf[1];
|
|
return 2;
|
|
}
|
|
if (wc >= 0x2170 && wc <= 0x2179) {
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = 0xa2;
|
|
r[1] = 0xa1 + (wc-0x2170);
|
|
return 2;
|
|
}
|
|
ret = cp936ext_wctomb(conv,buf,wc,2);
|
|
if (ret != RET_ILUNI) {
|
|
if (ret != 2) abort();
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = buf[0];
|
|
r[1] = buf[1];
|
|
return 2;
|
|
}
|
|
if (wc == 0x00b7) {
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = 0xa1;
|
|
r[1] = 0xa4;
|
|
return 2;
|
|
}
|
|
if (wc == 0x2014) {
|
|
if (n < 2)
|
|
return RET_TOOSMALL;
|
|
r[0] = 0xa1;
|
|
r[1] = 0xaa;
|
|
return 2;
|
|
}
|
|
|
|
return RET_ILUNI;
|
|
}
|