1 /* Test file for mpfr_set_z. 2 3 Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. 4 Contributed by the AriC and Caramel 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 #include <limits.h> 26 27 #include "mpfr-test.h" 28 29 static void check0(void) 30 { 31 mpz_t y; 32 mpfr_t x; 33 int inexact, r; 34 35 /* Check for +0 */ 36 mpfr_init (x); 37 mpz_init (y); 38 mpz_set_si (y, 0); 39 for(r = 0; r < MPFR_RND_MAX; r++) 40 { 41 inexact = mpfr_set_z (x, y, (mpfr_rnd_t) r); 42 if (!MPFR_IS_ZERO(x) || !MPFR_IS_POS(x) || inexact) 43 { 44 printf("mpfr_set_z(x,0) failed for %s\n", 45 mpfr_print_rnd_mode ((mpfr_rnd_t) r)); 46 exit(1); 47 } 48 } 49 mpfr_clear(x); 50 mpz_clear(y); 51 } 52 53 /* FIXME: It'd be better to examine the actual data in an mpfr_t to see that 54 it's as expected. Comparing mpfr_set_z with mpfr_cmp or against 55 mpfr_get_si is a rather indirect test of a low level routine. */ 56 57 static void 58 check (long i, mpfr_rnd_t rnd) 59 { 60 mpfr_t f; 61 mpz_t z; 62 63 mpfr_init2 (f, 8 * sizeof(long)); 64 mpz_init (z); 65 mpz_set_ui (z, i); 66 mpfr_set_z (f, z, rnd); 67 if (mpfr_get_si (f, MPFR_RNDZ) != i) 68 { 69 printf ("Error in mpfr_set_z for i=%ld rnd_mode=%d\n", i, rnd); 70 exit (1); 71 } 72 mpfr_clear (f); 73 mpz_clear (z); 74 } 75 76 static void 77 check_large (void) 78 { 79 mpz_t z; 80 mpfr_t x, y; 81 mpfr_exp_t emax, emin; 82 83 mpz_init (z); 84 mpfr_init2 (x, 160); 85 mpfr_init2 (y, 160); 86 87 mpz_set_str (z, "77031627725494291259359895954016675357279104942148788042", 10); 88 mpfr_set_z (x, z, MPFR_RNDN); 89 mpfr_set_str_binary (y, "0.1100100100001111110110101010001000100001011010001100001000110100110001001100011001100010100010111000000011011100000111001101000100101001000000100100111000001001E186"); 90 if (mpfr_cmp (x, y)) 91 { 92 printf ("Error in mpfr_set_z on large input\n"); 93 exit (1); 94 } 95 96 /* check overflow */ 97 emax = mpfr_get_emax (); 98 set_emax (2); 99 mpz_set_str (z, "7", 10); 100 mpfr_set_z (x, z, MPFR_RNDU); 101 MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); 102 set_emax (3); 103 mpfr_set_prec (x, 2); 104 mpz_set_str (z, "7", 10); 105 mpfr_set_z (x, z, MPFR_RNDU); 106 MPFR_ASSERTN(mpfr_inf_p (x) && mpfr_sgn (x) > 0); 107 set_emax (emax); 108 109 /* check underflow */ 110 emin = mpfr_get_emin (); 111 set_emin (3); 112 mpz_set_str (z, "1", 10); 113 mpfr_set_z (x, z, MPFR_RNDZ); 114 MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x)); 115 set_emin (2); 116 mpfr_set_z (x, z, MPFR_RNDN); 117 MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS(x)); 118 set_emin (emin); 119 120 mpz_clear (z); 121 122 mpfr_clear (x); 123 mpfr_clear (y); 124 } 125 126 int 127 main (int argc, char *argv[]) 128 { 129 long j; 130 131 tests_start_mpfr (); 132 133 check_large (); 134 check (0, MPFR_RNDN); 135 for (j = 0; j < 200000; j++) 136 check (randlimb () & LONG_MAX, RND_RAND ()); 137 check0 (); 138 139 tests_end_mpfr (); 140 141 return 0; 142 } 143