mirror of https://gitee.com/openkylin/wget.git
76 lines
1.9 KiB
C
76 lines
1.9 KiB
C
|
/* Store a character in UTF-8 string.
|
||
|
|
Copyright (C) 2002, 2005-2006, 2009-2019 Free Software Foundation, Inc.
|
||
|
|
Written by Bruno Haible <bruno@clisp.org>, 2002.
|
||
|
|
|
||
|
|
This program is free software: you can redistribute it and/or modify it
|
||
|
|
under the terms of the GNU General Public License as published
|
||
|
|
by the Free Software Foundation; either version 3 of the License, or
|
||
|
|
(at your option) any later version.
|
||
|
|
|
||
|
|
This program 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
|
||
|
|
General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU General Public License
|
||
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
||
|
|
|
||
|
|
#include <config.h>
|
||
|
|
|
||
|
|
#if defined IN_LIBUNISTRING
|
||
|
|
/* Tell unistr.h to declare u8_uctomb as 'extern', not 'static inline'. */
|
||
|
|
# include "unistring-notinline.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Specification. */
|
||
|
|
#include "unistr.h"
|
||
|
|
|
||
|
|
#if !HAVE_INLINE
|
||
|
|
|
||
|
|
int
|
||
|
|
u8_uctomb (uint8_t *s, ucs4_t uc, int n)
|
||
|
|
{
|
||
|
|
if (uc < 0x80)
|
||
|
|
{
|
||
|
|
if (n > 0)
|
||
|
|
{
|
||
|
|
s[0] = uc;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
/* else return -2, below. */
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
int count;
|
||
|
|
|
||
|
|
if (uc < 0x800)
|
||
|
|
count = 2;
|
||
|
|
else if (uc < 0x10000)
|
||
|
|
{
|
||
|
|
if (uc < 0xd800 || uc >= 0xe000)
|
||
|
|
count = 3;
|
||
|
|
else
|
||
|
|
return -1;
|
||
|
|
}
|
||
|
|
else if (uc < 0x110000)
|
||
|
|
count = 4;
|
||
|
|
else
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
if (n >= count)
|
||
|
|
{
|
||
|
|
switch (count) /* note: code falls through cases! */
|
||
|
|
{
|
||
|
|
case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
|
||
|
|
case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
|
||
|
|
case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
|
||
|
|
/*case 1:*/ s[0] = uc;
|
||
|
|
}
|
||
|
|
return count;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -2;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|