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.
79 lines
2.2 KiB
79 lines
2.2 KiB
/* |
|
* Copyright (C) 1999-2001, 2008, 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/>. |
|
*/ |
|
|
|
/* |
|
* UTF-16BE |
|
*/ |
|
|
|
/* Specification: RFC 2781 */ |
|
|
|
static int |
|
utf16be_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, size_t n) |
|
{ |
|
int count = 0; |
|
if (n >= 2) { |
|
ucs4_t wc = (s[0] << 8) + s[1]; |
|
if (wc >= 0xd800 && wc < 0xdc00) { |
|
if (n >= 4) { |
|
ucs4_t wc2 = (s[2] << 8) + s[3]; |
|
if (!(wc2 >= 0xdc00 && wc2 < 0xe000)) |
|
goto ilseq; |
|
*pwc = 0x10000 + ((wc - 0xd800) << 10) + (wc2 - 0xdc00); |
|
return count+4; |
|
} |
|
} else if (wc >= 0xdc00 && wc < 0xe000) { |
|
goto ilseq; |
|
} else { |
|
*pwc = wc; |
|
return count+2; |
|
} |
|
} |
|
return RET_TOOFEW(count); |
|
|
|
ilseq: |
|
return RET_SHIFT_ILSEQ(count); |
|
} |
|
|
|
static int |
|
utf16be_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, size_t n) |
|
{ |
|
if (!(wc >= 0xd800 && wc < 0xe000)) { |
|
if (wc < 0x10000) { |
|
if (n >= 2) { |
|
r[0] = (unsigned char) (wc >> 8); |
|
r[1] = (unsigned char) wc; |
|
return 2; |
|
} else |
|
return RET_TOOSMALL; |
|
} |
|
else if (wc < 0x110000) { |
|
if (n >= 4) { |
|
ucs4_t wc1 = 0xd800 + ((wc - 0x10000) >> 10); |
|
ucs4_t wc2 = 0xdc00 + ((wc - 0x10000) & 0x3ff); |
|
r[0] = (unsigned char) (wc1 >> 8); |
|
r[1] = (unsigned char) wc1; |
|
r[2] = (unsigned char) (wc2 >> 8); |
|
r[3] = (unsigned char) wc2; |
|
return 4; |
|
} else |
|
return RET_TOOSMALL; |
|
} |
|
} |
|
return RET_ILUNI; |
|
}
|
|
|