1 /* Test file for mpfr_set_q. 2 3 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 4 Contributed by the Arenaire and Cacao 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 <stdio.h> 24 #include <stdlib.h> 25 26 #include "mpfr-test.h" 27 28 static void 29 check (long int n, long int d, mpfr_rnd_t rnd, const char *ys) 30 { 31 mpq_t q; 32 mpfr_t x, t; 33 int inexact, compare; 34 35 mpfr_init2 (x, 53); 36 mpfr_init2 (t, mpfr_get_prec (x) + mp_bits_per_limb); 37 mpq_init (q); 38 mpq_set_si (q, n, d); 39 inexact = mpfr_set_q (x, q, rnd); 40 41 /* check values */ 42 if (mpfr_cmp_str1(x, ys)) 43 { 44 printf ("Error for q=%ld/%ld and rnd=%s\n", n, d, 45 mpfr_print_rnd_mode (rnd)); 46 printf ("correct result is %s, mpfr_set_q gives ", ys); 47 mpfr_out_str(stdout, 10, 0, x, MPFR_RNDN); 48 putchar('\n'); 49 exit (1); 50 } 51 52 /* check inexact flag */ 53 if (mpfr_mul_ui (t, x, (d < 0) ? (-d) : d, rnd)) 54 { 55 printf ("t <- x * d should be exact\n"); 56 exit (1); 57 } 58 compare = mpfr_cmp_si (t, n); 59 if (((inexact == 0) && (compare != 0)) || 60 ((inexact < 0) && (compare >= 0)) || 61 ((inexact > 0) && (compare <= 0))) 62 { 63 printf ("wrong inexact flag: expected %d, got %d\n", compare, 64 inexact); 65 exit (1); 66 } 67 68 mpfr_clear (x); 69 mpfr_clear (t); 70 mpq_clear (q); 71 } 72 73 static void check0(void) 74 { 75 mpq_t y; 76 mpfr_t x; 77 int inexact; 78 int r; 79 80 /* Check for +0 */ 81 mpfr_init (x); 82 mpq_init (y); 83 mpq_set_si (y, 0, 1); 84 for (r = 0; r < MPFR_RND_MAX; r++) 85 { 86 inexact = mpfr_set_q(x, y, (mpfr_rnd_t) r); 87 if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact) 88 { 89 printf("mpfr_set_q(x,0) failed for %s\n", 90 mpfr_print_rnd_mode ((mpfr_rnd_t) r)); 91 exit(1); 92 } 93 } 94 mpfr_clear (x); 95 mpq_clear (y); 96 } 97 98 int 99 main (void) 100 { 101 tests_start_mpfr (); 102 103 check(-1647229822, 40619231, MPFR_RNDZ, "-4.055295438754120596e1"); 104 check(-148939696, 1673285490, MPFR_RNDZ, "-8.9010331404953485501e-2"); 105 check(-441322590, 273662545, MPFR_RNDZ, "-1.6126525096812205362"); 106 check(-1631156895, 1677687197, MPFR_RNDU, "-9.722652100563177191e-1"); 107 check(2141332571, 3117601, MPFR_RNDZ, "6.8685267004982347316e2"); 108 check(75504803, 400207282, MPFR_RNDU, "1.8866424074712365155e-1"); 109 check(643562308, 23100894, MPFR_RNDD, "2.7858762002890447462e1"); 110 check(632549085, 1831935802, MPFR_RNDN, "3.4528998467600230393e-1"); 111 check (1, 1, MPFR_RNDN, "1.0"); 112 113 check0(); 114 115 tests_end_mpfr (); 116 return 0; 117 } 118