uclibc-ng/libc/stdlib/drand48.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 <mailto: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 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.

   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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#define erand48_r __erand48_r

#include <stdlib.h>

/* Global state for non-reentrant functions.  Defined in drand48-iter.c.  */
extern struct drand48_data __libc_drand48_data;

double drand48 (void)
{
    double result;

    erand48_r (__libc_drand48_data.__x, &__libc_drand48_data, &result);

    return result;
}