1 /* $OpenBSD: seed48.c,v 1.4 2014/12/08 21:45:20 deraadt Exp $ */ 2 /* 3 * Copyright (c) 1993 Martin Birgmeier 4 * All rights reserved. 5 * 6 * You may redistribute unmodified or modified versions of this source 7 * code provided that the above copyright notice and this and the 8 * following conditions are retained. 9 * 10 * This software is provided ``as is'', and comes with no warranties 11 * of any kind. I shall in no event be liable for anything that happens 12 * to anyone/anything when using this software. 13 */ 14 15 #include "rand48.h" 16 17 extern unsigned short __rand48_seed[3]; 18 extern unsigned short __rand48_mult[3]; 19 extern unsigned short __rand48_add; 20 21 unsigned short * 22 seed48(unsigned short xseed[3]) 23 { 24 unsigned short *res; 25 26 res = seed48_deterministic(xseed); 27 __rand48_deterministic = 0; 28 return res; 29 } 30 31 unsigned short * 32 seed48_deterministic(unsigned short xseed[3]) 33 { 34 static unsigned short sseed[3]; 35 36 __rand48_deterministic = 1; 37 sseed[0] = __rand48_seed[0]; 38 sseed[1] = __rand48_seed[1]; 39 sseed[2] = __rand48_seed[2]; 40 __rand48_seed[0] = xseed[0]; 41 __rand48_seed[1] = xseed[1]; 42 __rand48_seed[2] = xseed[2]; 43 __rand48_mult[0] = RAND48_MULT_0; 44 __rand48_mult[1] = RAND48_MULT_1; 45 __rand48_mult[2] = RAND48_MULT_2; 46 __rand48_add = RAND48_ADD; 47 return sseed; 48 } 49