freebsd-skq/lib/libc/gen/mrand48.c
ed fc072c0499 Properly sign extend the result of jrand48() and mrand48().
These functions are supposed to return a value between [_2^31, 2^31).
This doesn't seem to work on 64-bit systems, where we return a value
between [0, 3^32). Patch up the function to use proper casts to int32_t.
While there, fix some other style bugs.

MFC after:	2 weeks
2016-12-06 19:08:29 +00:00

31 lines
709 B
C

/*
* Copyright (c) 1993 Martin Birgmeier
* All rights reserved.
*
* You may redistribute unmodified or modified versions of this source
* code provided that the above copyright notice and this and the
* following conditions are retained.
*
* This software is provided ``as is'', and comes with no warranties
* of any kind. I shall in no event be liable for anything that happens
* to anyone/anything when using this software.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdint.h>
#include "rand48.h"
extern unsigned short _rand48_seed[3];
long
mrand48(void)
{
_dorand48(_rand48_seed);
return ((int32_t)(((uint32_t)_rand48_seed[2] << 16) |
(uint32_t)_rand48_seed[1]));
}