mirror of
https://git.zap.org.au/git/trader.git
synced 2024-10-13 18:03:39 -04:00
d07dc71f1b
These files have been created by running ./build-aux/bootstrap with Gnulib as at commit f9b39c4e337f1dc0dd07c4f3985c476fb875d799 (with a date stamp of Sun Jul 31 23:28:18 2022 +0200), Autoconf 2.71, Automake 1.16.5, Gettext 0.21 and pkgconf 1.8.0.
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* Conversion UCS-4 to UTF-8.
|
|
Copyright (C) 2002, 2006-2007, 2009-2022 Free Software Foundation, Inc.
|
|
Written by Bruno Haible <bruno@clisp.org>, 2002.
|
|
|
|
This file is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU Lesser General Public License as
|
|
published by the Free Software Foundation; either version 2.1 of the
|
|
License, or (at your option) any later version.
|
|
|
|
This file 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 this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#include <config.h>
|
|
|
|
/* Specification. */
|
|
#include "unistr.h"
|
|
|
|
#include "attribute.h"
|
|
|
|
int
|
|
u8_uctomb_aux (uint8_t *s, ucs4_t uc, ptrdiff_t n)
|
|
{
|
|
int count;
|
|
|
|
if (uc < 0x80)
|
|
/* The case n >= 1 is already handled by the caller. */
|
|
return -2;
|
|
else 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)
|
|
return -2;
|
|
|
|
switch (count) /* note: code falls through cases! */
|
|
{
|
|
case 4: s[3] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x10000;
|
|
FALLTHROUGH;
|
|
case 3: s[2] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0x800;
|
|
FALLTHROUGH;
|
|
case 2: s[1] = 0x80 | (uc & 0x3f); uc = uc >> 6; uc |= 0xc0;
|
|
/*case 1:*/ s[0] = uc;
|
|
}
|
|
return count;
|
|
}
|