glibc/stdlib/drand48.c

34 lines
1.2 KiB
C

/* Copyright (C) 1995, 1996, 1997, 1998, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
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 <stdlib.h>
/* Global state for non-reentrant functions. Defined in drand48-iter.c. */
extern struct drand48_data __libc_drand48_data;
double
drand48 ()
{
double result;
(void) __erand48_r (__libc_drand48_data.__x, &__libc_drand48_data, &result);
return result;
}