mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-10 15:20:10 +00:00
45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
/* Return quiet nan.
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
|
|
|
The GNU C 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 C 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 C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <math.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <ieee754.h>
|
|
|
|
|
|
double
|
|
__nan (const char *tagp)
|
|
{
|
|
if (tagp[0] != '\0')
|
|
{
|
|
char buf[6 + strlen (tagp)];
|
|
sprintf (buf, "NAN(%s)", tagp);
|
|
return strtod (buf, NULL);
|
|
}
|
|
|
|
return NAN;
|
|
}
|
|
weak_alias (__nan, nan)
|
|
#ifdef NO_LONG_DOUBLE
|
|
strong_alias (__nan, __nanl)
|
|
weak_alias (__nan, nanl)
|
|
#endif
|