1 /* Test mpq_cmp. 2 3 Copyright 1996, 2001 Free Software Foundation, Inc. 4 5 This file is part of the GNU MP Library. 6 7 The GNU MP Library is free software; you can redistribute it and/or modify 8 it under the terms of the GNU Lesser General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or (at your 10 option) any later version. 11 12 The GNU MP Library is distributed in the hope that it will be useful, but 13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 15 License for more details. 16 17 You should have received a copy of the GNU Lesser General Public License 18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 23 #include "gmp.h" 24 #include "gmp-impl.h" 25 #include "tests.h" 26 27 #define NUM(x) (&((x)->_mp_num)) 28 #define DEN(x) (&((x)->_mp_den)) 29 30 #define SGN(x) ((x) < 0 ? -1 : (x) > 0 ? 1 : 0) 31 32 int 33 ref_mpq_cmp (mpq_t a, mpq_t b) 34 { 35 mpz_t ai, bi; 36 int cc; 37 38 mpz_init (ai); 39 mpz_init (bi); 40 41 mpz_mul (ai, NUM (a), DEN (b)); 42 mpz_mul (bi, NUM (b), DEN (a)); 43 cc = mpz_cmp (ai, bi); 44 mpz_clear (ai); 45 mpz_clear (bi); 46 return cc; 47 } 48 49 #ifndef SIZE 50 #define SIZE 8 /* increasing this lowers the probabilty of finding an error */ 51 #endif 52 53 int 54 main (int argc, char **argv) 55 { 56 mpq_t a, b; 57 mp_size_t size; 58 int reps = 10000; 59 int i; 60 int cc, ccref; 61 62 tests_start (); 63 64 if (argc == 2) 65 reps = atoi (argv[1]); 66 67 mpq_init (a); 68 mpq_init (b); 69 70 for (i = 0; i < reps; i++) 71 { 72 size = urandom () % SIZE - SIZE/2; 73 mpz_random2 (NUM (a), size); 74 do 75 { 76 size = urandom () % SIZE - SIZE/2; 77 mpz_random2 (DEN (a), size); 78 } 79 while (mpz_cmp_ui (DEN (a), 0) == 0); 80 81 size = urandom () % SIZE - SIZE/2; 82 mpz_random2 (NUM (b), size); 83 do 84 { 85 size = urandom () % SIZE - SIZE/2; 86 mpz_random2 (DEN (b), size); 87 } 88 while (mpz_cmp_ui (DEN (b), 0) == 0); 89 90 mpq_canonicalize (a); 91 mpq_canonicalize (b); 92 93 ccref = ref_mpq_cmp (a, b); 94 cc = mpq_cmp (a, b); 95 96 if (SGN (ccref) != SGN (cc)) 97 abort (); 98 } 99 100 mpq_clear (a); 101 mpq_clear (b); 102 103 tests_end (); 104 exit (0); 105 } 106