1 /* Test the Mersenne Twister random number generator. 2 3 Copyright 2002 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library test suite. 6 7 The GNU MP Library test suite is free software; you can redistribute it 8 and/or modify it under the terms of the GNU General Public License as 9 published by the Free Software Foundation; either version 3 of the License, 10 or (at your option) any later version. 11 12 The GNU MP Library test suite is distributed in the hope that it will be 13 useful, but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 15 Public License for more details. 16 17 You should have received a copy of the GNU General Public License along with 18 the GNU MP Library test suite. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include "gmp.h" 22 #include "gmp-impl.h" 23 #include "tests.h" 24 25 #ifndef TRUE 26 #define TRUE (1) 27 #endif 28 #ifndef FALSE 29 #define FALSE (0) 30 #endif 31 32 /* Test that the sequence without seeding equals the sequence with the 33 default seed. */ 34 int 35 chk_default_seed (void) 36 { 37 gmp_randstate_t r1, r2; 38 mpz_t a, b; 39 int i; 40 int ok = TRUE; 41 42 mpz_init2 (a, 19936L); 43 mpz_init2 (b, 19936L); 44 45 gmp_randinit_mt (r1); 46 gmp_randinit_mt (r2); 47 gmp_randseed_ui (r2, 5489L); /* Must match DEFAULT_SEED in randmt.c */ 48 for (i = 0; i < 3; i++) 49 { 50 /* Extract one whole buffer per iteration. */ 51 mpz_urandomb (a, r1, 19936L); 52 mpz_urandomb (b, r2, 19936L); 53 if (mpz_cmp (a, b) != 0) 54 { 55 ok = FALSE; 56 printf ("Default seed fails in iteration %d\n", i); 57 break; 58 } 59 } 60 gmp_randclear (r1); 61 gmp_randclear (r2); 62 63 mpz_clear (a); 64 mpz_clear (b); 65 return ok; 66 } 67 68 int 69 main (int argc, char *argv[]) 70 { 71 int ok; 72 73 tests_start (); 74 75 ok = chk_default_seed (); 76 77 tests_end (); 78 79 if (ok) 80 return 0; /* pass */ 81 else 82 return 1; /* fail */ 83 } 84