1 /*********************************************************************************** 2 random_number.cpp 3 4 * Copyright (c) 1997 5 * Mark of the Unicorn, Inc. 6 * 7 * Permission to use, copy, modify, distribute and sell this software 8 * and its documentation for any purpose is hereby granted without fee, 9 * provided that the above copyright notice appear in all copies and 10 * that both that copyright notice and this permission notice appear 11 * in supporting documentation. Mark of the Unicorn makes no 12 * representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied warranty. 14 15 ***********************************************************************************/ 16 #include "random_number.h" 17 #include "Prefix.h" 18 #if defined (EH_NEW_HEADERS) 19 # include <functional> 20 # include <cstdlib> 21 #else 22 # include <function.h> 23 # include <stdlib.h> 24 #endif 25 random_number(size_t range)26unsigned random_number( size_t range ) 27 { 28 #if !defined( __SGI_STL ) 29 if (range == 0) return 0; 30 return (unsigned)(EH_STD::rand() + EH_STD::rand()) % range; 31 #else 32 static EH_STD::subtractive_rng rnd; 33 if (range==0) return 0; 34 return rnd(range); 35 #endif 36 } 37 38 // default base for random container sizes 39 unsigned random_base = 1000; 40