1 /* Test file for mpfr_get_q. 2 3 Copyright 2017-2018 Free Software Foundation, Inc. 4 Contributed by the AriC and Caramba projects, INRIA. 5 6 This file is part of the GNU MPFR Library. 7 8 The GNU MPFR Library is free software; you can redistribute it and/or modify 9 it under the terms of the GNU Lesser General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or (at your 11 option) any later version. 12 13 The GNU MPFR Library is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 16 License for more details. 17 18 You should have received a copy of the GNU Lesser General Public License 19 along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see 20 http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., 21 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ 22 23 #include "mpfr-test.h" 24 25 #ifndef MPFR_USE_MINI_GMP 26 27 static void 28 special (void) 29 { 30 mpfr_t f; 31 mpq_t q; 32 33 mpfr_init2 (f, MPFR_PREC_MIN); 34 mpq_init (q); 35 36 /* check NaN */ 37 mpfr_set_nan (f); 38 mpfr_clear_erangeflag (); 39 mpfr_get_q (q, f); 40 MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0); 41 MPFR_ASSERTN(mpfr_erangeflag_p ()); 42 43 /* check +Inf */ 44 mpfr_set_inf (f, 1); 45 mpfr_clear_erangeflag (); 46 mpfr_get_q (q, f); 47 MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0); 48 MPFR_ASSERTN(mpfr_erangeflag_p ()); 49 50 /* check -Inf */ 51 mpfr_set_inf (f, -1); 52 mpfr_clear_erangeflag (); 53 mpfr_get_q (q, f); 54 MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0); 55 MPFR_ASSERTN(mpfr_erangeflag_p ()); 56 57 /* check +0 */ 58 mpfr_set_zero (f, 1); 59 mpfr_clear_erangeflag (); 60 mpfr_get_q (q, f); 61 MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0); 62 MPFR_ASSERTN(!mpfr_erangeflag_p ()); 63 64 /* check -0 */ 65 mpfr_set_zero (f, -1); 66 mpfr_clear_erangeflag (); 67 mpfr_get_q (q, f); 68 MPFR_ASSERTN(mpq_cmp_ui (q, 0, 1) == 0); 69 MPFR_ASSERTN(!mpfr_erangeflag_p ()); 70 71 mpq_clear (q); 72 mpfr_clear (f); 73 } 74 75 static void 76 random_tests (void) 77 { 78 mpfr_t f, g; 79 mpq_t q; 80 int inex; 81 mpfr_rnd_t rnd; 82 int i; 83 84 mpfr_init2 (f, MPFR_PREC_MIN + (randlimb() % 100)); 85 mpfr_init2 (g, mpfr_get_prec (f)); 86 mpq_init (q); 87 88 for (i = 0; i < 1000; i++) 89 { 90 mpfr_urandomb (f, RANDS); 91 mpfr_get_q (q, f); 92 rnd = RND_RAND (); 93 inex = mpfr_set_q (g, q, rnd); 94 MPFR_ASSERTN(inex == 0); 95 MPFR_ASSERTN(mpfr_cmp (f, g) == 0); 96 } 97 98 mpq_clear (q); 99 mpfr_clear (f); 100 mpfr_clear (g); 101 } 102 103 /* Check results are in canonical form. 104 See https://sympa.inria.fr/sympa/arc/mpfr/2017-12/msg00029.html */ 105 static void 106 check_canonical (void) 107 { 108 mpfr_t x; 109 mpq_t q; 110 mpz_t z; 111 112 mpfr_init2 (x, 53); 113 mpfr_set_ui (x, 3, MPFR_RNDN); 114 mpq_init (q); 115 mpfr_get_q (q, x); 116 /* check the denominator is positive */ 117 if (mpz_sgn (mpq_denref (q)) <= 0) 118 { 119 printf ("Error, the denominator of mpfr_get_q should be positive\n"); 120 exit (1); 121 } 122 mpz_init (z); 123 mpz_gcd (z, mpq_numref (q), mpq_denref (q)); 124 /* check the numerator and denominator are coprime */ 125 if (mpz_cmp_ui (z, 1) != 0) 126 { 127 printf ("Error, numerator and denominator of mpfr_get_q should be coprime\n"); 128 exit (1); 129 } 130 mpfr_clear (x); 131 mpq_clear (q); 132 mpz_clear (z); 133 } 134 135 int 136 main (void) 137 { 138 tests_start_mpfr (); 139 140 special (); 141 random_tests (); 142 143 check_canonical (); 144 145 tests_end_mpfr (); 146 return 0; 147 } 148 149 #else 150 151 int 152 main (void) 153 { 154 return 77; 155 } 156 157 #endif /* MPFR_USE_MINI_GMP */ 158