You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
3.5 KiB
125 lines
3.5 KiB
/* |
|
* Copyright (C) 2005, 2016 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, see <http://www.gnu.org/licenses/>. |
|
*/ |
|
|
|
/* |
|
* CP936 |
|
*/ |
|
|
|
/* |
|
* The IANA has CP936 as an alias of GBK. But GBK is an official Chinese |
|
* specification, whereas CP936 is de-facto maintained by Microsoft. And, |
|
* of course, Microsoft modified CP936 since 1999. |
|
* |
|
* The differences from GBK are: |
|
* |
|
* 1. A single character: |
|
* |
|
* code CP936.TXT |
|
* 0x80 0x20AC # EURO SIGN |
|
* |
|
* Some variants of CP936 (in JDK, Windows-2000, ICU) also add: |
|
* |
|
* 2. Private area mappings: |
|
* |
|
* code Unicode |
|
* 0x{A1..A2}{40..7E,80..A0} U+E4C6..U+E585 |
|
* 0x{AA..AF,F8..FE}{A1..FE} U+E000..U+E4C5 |
|
* |
|
* We add them too because, although there are backward compatibility problems |
|
* when a character from a private area is moved to an official Unicode code |
|
* point, they are useful for some people in practice. |
|
*/ |
|
|
|
static int |
|
cp936_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
|
{ |
|
/* Try GBK first. */ |
|
{ |
|
int ret = ces_gbk_mbtowc(conv,pwc,s,n); |
|
if (ret != RET_ILSEQ) |
|
return ret; |
|
} |
|
/* Then handle the additional mappings. */ |
|
{ |
|
unsigned char c = *s; |
|
if (c == 0x80) { |
|
*pwc = 0x20ac; |
|
return 1; |
|
} |
|
/* User-defined characters */ |
|
if (c >= 0xa1 && c <= 0xa2) { |
|
if (n < 2) |
|
return RET_TOOFEW(0); |
|
{ |
|
unsigned char c2 = s[1]; |
|
if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0x80 && c2 < 0xa1)) { |
|
*pwc = 0xe4c6 + 96 * (c - 0xa1) + (c2 - (c2 >= 0x80 ? 0x41 : 0x40)); |
|
return 2; |
|
} |
|
} |
|
} else if ((c >= 0xaa && c < 0xb0) || (c >= 0xf8 && c < 0xff)) { |
|
if (n < 2) |
|
return RET_TOOFEW(0); |
|
{ |
|
unsigned char c2 = s[1]; |
|
if (c2 >= 0xa1 && c2 < 0xff) { |
|
*pwc = 0xe000 + 94 * (c - (c >= 0xf8 ? 0xf2 : 0xaa)) + (c2 - 0xa1); |
|
return 2; |
|
} |
|
} |
|
} |
|
} |
|
return RET_ILSEQ; |
|
} |
|
|
|
static int |
|
cp936_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
|
{ |
|
/* Try GBK first. */ |
|
{ |
|
int ret = ces_gbk_wctomb(conv,r,wc,n); |
|
if (ret != RET_ILUNI) |
|
return ret; |
|
} |
|
/* Then handle the additional mappings. */ |
|
if (wc >= 0xe000 && wc < 0xe586) { |
|
/* User-defined characters */ |
|
if (n < 2) |
|
return RET_TOOFEW(0); |
|
if (wc < 0xe4c6) { |
|
unsigned int i = wc - 0xe000; |
|
unsigned int c1 = i / 94; |
|
unsigned int c2 = i % 94; |
|
r[0] = c1 + (c1 < 6 ? 0xaa : 0xf2); |
|
r[1] = c2 + 0xa1; |
|
return 2; |
|
} else { |
|
unsigned int i = wc - 0xe4c6; |
|
unsigned int c1 = i / 96; |
|
unsigned int c2 = i % 96; |
|
r[0] = c1 + 0xa1; |
|
r[1] = c2 + (c2 < 0x3f ? 0x40 : 0x41); |
|
return 2; |
|
} |
|
} else if (wc == 0x20ac) { |
|
r[0] = 0x80; |
|
return 1; |
|
} |
|
return RET_ILUNI; |
|
}
|
|
|