1 /* Test mpf_set, mpf_init_set. 2 3 Copyright 2004, 2012 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 https://www.gnu.org/licenses/. */ 19 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include "gmp-impl.h" 23 #include "tests.h" 24 25 void 26 check_reuse (void) 27 { 28 /* Try mpf_set(f,f) when f is bigger than prec. In the past this had 29 resulted in an MPN_COPY with invalid operand overlap. */ 30 mpf_t f; 31 mp_size_t limbs = 20; 32 unsigned long bits = limbs * GMP_NUMB_BITS; 33 mpf_init2 (f, bits); 34 refmpf_fill (f, limbs, GMP_NUMB_MAX); 35 mpf_set_prec_raw (f, bits / 2); 36 mpf_set (f, f); 37 MPF_CHECK_FORMAT (f); 38 mpf_set_prec_raw (f, bits); 39 mpf_clear (f); 40 } 41 42 void 43 check_random (long reps) 44 { 45 unsigned long test; 46 gmp_randstate_ptr rands; 47 mpf_t a, b; 48 mpz_t z; 49 int precbits; 50 51 #define PRECBITS 10 52 53 rands = RANDS; 54 55 mpz_init (z); 56 mpf_init2 (a, 1 << PRECBITS); 57 58 for (test = 0; test < reps; test++) 59 { 60 mpz_urandomb (z, rands, PRECBITS + 1); 61 precbits = mpz_get_ui (z) + 1; 62 mpz_urandomb (z, rands, precbits); 63 mpz_setbit (z, precbits - 1); /* make sure msb is set */ 64 mpf_set_z (a, z); 65 if (precbits & 1) 66 mpf_neg (a, a); 67 mpz_urandomb (z, rands, PRECBITS); 68 mpf_div_2exp (a, a, mpz_get_ui (z) + 1); 69 mpz_urandomb (z, rands, PRECBITS); 70 precbits -= mpz_get_ui (z); 71 if (precbits <= 0) 72 precbits = 1 - precbits; 73 mpf_set_default_prec (precbits); 74 75 mpf_init_set (b, a); 76 MPF_CHECK_FORMAT (b); 77 if (!mpf_eq (a, b, precbits)) 78 { 79 printf ("mpf_init_set wrong.\n"); 80 abort(); 81 } 82 83 mpf_set_ui (b, 0); 84 mpf_set (b, a); 85 MPF_CHECK_FORMAT (b); 86 if (!mpf_eq (a, b, precbits)) 87 { 88 printf ("mpf_set wrong.\n"); 89 abort(); 90 } 91 92 mpf_clear (b); 93 } 94 95 mpf_clear (a); 96 mpz_clear (z); 97 } 98 99 int 100 main (int argc, char *argv[]) 101 { 102 long reps = 10000; 103 104 tests_start (); 105 TESTS_REPS (reps, argv, argc); 106 107 check_reuse (); 108 check_random (reps); 109 110 tests_end (); 111 exit (0); 112 } 113