glibc/stdlib/nrand48_r.c

37 lines
1.2 KiB
C

/* Copyright (C) 1995-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
int
__nrand48_r (unsigned short int xsubi[3], struct drand48_data *buffer,
long int *result)
{
/* Compute next state. */
if (__drand48_iterate (xsubi, buffer) < 0)
return -1;
/* Store the result. */
if (sizeof (unsigned short int) == 2)
*result = xsubi[2] << 15 | xsubi[1] >> 1;
else
*result = xsubi[2] >> 1;
return 0;
}
weak_alias (__nrand48_r, nrand48_r)