glibc/stdlib/srand48_r.c

40 lines
1.3 KiB
C

/* Copyright (C) 1995-2017 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 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, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <limits.h>
int
__srand48_r (long int seedval, struct drand48_data *buffer)
{
/* The standards say we only have 32 bits. */
if (sizeof (long int) > 4)
seedval &= 0xffffffffl;
buffer->__x[2] = seedval >> 16;
buffer->__x[1] = seedval & 0xffffl;
buffer->__x[0] = 0x330e;
buffer->__a = 0x5deece66dull;
buffer->__c = 0xb;
buffer->__init = 1;
return 0;
}
weak_alias (__srand48_r, srand48_r)