1 /* Test file for mpfr_set. 2 3 Copyright 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 int error; 29 30 #define PRINT_ERROR_IF(condition, text) \ 31 do { \ 32 if (condition) \ 33 { \ 34 printf ("%s", text); \ 35 error = 1; \ 36 } \ 37 } while (0) 38 39 40 /* Maybe better create its own test file ? */ 41 static void 42 check_neg_special (void) 43 { 44 mpfr_t x; 45 mpfr_init (x); 46 MPFR_SET_NAN (x); 47 mpfr_clear_nanflag (); 48 mpfr_neg (x, x, MPFR_RNDN); 49 PRINT_ERROR_IF (!mpfr_nanflag_p (), 50 "ERROR: neg (NaN) doesn't set Nan flag.\n"); 51 mpfr_clear (x); 52 } 53 54 static void 55 check_special (void) 56 { 57 mpfr_t x, y; 58 int inexact; 59 60 mpfr_init (x); 61 mpfr_init (y); 62 63 mpfr_set_inf (x, 1); 64 PRINT_ERROR_IF (!mpfr_inf_p (x) || mpfr_sgn (x) < 0, 65 "ERROR: mpfr_set_inf failed to set variable to +infinity.\n"); 66 inexact = mpfr_set (y, x, MPFR_RNDN); 67 PRINT_ERROR_IF (!mpfr_inf_p (y) || mpfr_sgn (y) < 0 || inexact != 0, 68 "ERROR: mpfr_set failed to set variable to +infinity.\n"); 69 70 inexact = mpfr_set_ui (y, 0, MPFR_RNDN); 71 PRINT_ERROR_IF (!mpfr_zero_p (y) || mpfr_sgn (y) < 0 || inexact != 0, 72 "ERROR: mpfr_set_ui failed to set variable to +0.\n"); 73 74 mpfr_set_inf (x, -1); 75 PRINT_ERROR_IF (!mpfr_inf_p (x) || mpfr_sgn (x) > 0, 76 "ERROR: mpfr_set_inf failed to set variable to -infinity.\n"); 77 inexact = mpfr_set (y, x, MPFR_RNDN); 78 PRINT_ERROR_IF (!mpfr_inf_p (y) || mpfr_sgn (y) > 0 || inexact != 0, 79 "ERROR: mpfr_set failed to set variable to -infinity.\n"); 80 81 mpfr_set_zero (x, 1); 82 PRINT_ERROR_IF (!mpfr_zero_p (x) || mpfr_sgn (x) < 0, 83 "ERROR: mpfr_set_zero failed to set variable to +0.\n"); 84 inexact = mpfr_set (y, x, MPFR_RNDN); 85 PRINT_ERROR_IF (!mpfr_zero_p (y) || mpfr_sgn (y) < 0 || inexact != 0, 86 "ERROR: mpfr_set failed to set variable to +0.\n"); 87 88 mpfr_set_zero (x, -1); 89 PRINT_ERROR_IF (!mpfr_zero_p (x) || mpfr_sgn (x) > 0, 90 "ERROR: mpfr_set_zero failed to set variable to -0.\n"); 91 inexact = mpfr_set (y, x, MPFR_RNDN); 92 PRINT_ERROR_IF (!mpfr_zero_p (y) || mpfr_sgn (y) > 0 || inexact != 0, 93 "ERROR: mpfr_set failed to set variable to -0.\n"); 94 95 mpfr_set_nan (x); 96 PRINT_ERROR_IF (!mpfr_nan_p (x), 97 "ERROR: mpfr_set_nan failed to set variable to NaN.\n"); 98 inexact = mpfr_set (y, x, MPFR_RNDN); 99 PRINT_ERROR_IF (!mpfr_nan_p (y) || inexact != 0, 100 "ERROR: mpfr_set failed to set variable to NaN.\n"); 101 102 mpfr_clear (x); 103 mpfr_clear (y); 104 } 105 106 static void 107 check_ternary_value (void) 108 { 109 int p, q, rnd; 110 int inexact, cmp; 111 mpfr_t x, y; 112 113 mpfr_init (x); 114 mpfr_init (y); 115 for (p=2; p<500; p++) 116 { 117 mpfr_set_prec (x, p); 118 mpfr_urandomb (x, RANDS); 119 if (randlimb () % 2) 120 mpfr_neg (x, x, MPFR_RNDN); 121 for (q=2; q<2*p; q++) 122 { 123 mpfr_set_prec (y, q); 124 for (rnd = 0; rnd < MPFR_RND_MAX; rnd++) 125 { 126 inexact = mpfr_set (y, x, (mpfr_rnd_t) rnd); 127 cmp = mpfr_cmp (y, x); 128 if (((inexact == 0) && (cmp != 0)) || 129 ((inexact > 0) && (cmp <= 0)) || 130 ((inexact < 0) && (cmp >= 0))) 131 { 132 printf ("Wrong ternary value in mpfr_set: expected %d," 133 " got %d\n", cmp, inexact); 134 exit (1); 135 } 136 } 137 } 138 } 139 mpfr_clear (x); 140 mpfr_clear (y); 141 } 142 143 #define TEST_FUNCTION mpfr_set 144 #include "tgeneric.c" 145 146 int 147 main (void) 148 { 149 mpfr_t x, y, z, u; 150 int inexact; 151 mpfr_exp_t emax; 152 153 tests_start_mpfr (); 154 155 /* Default : no error */ 156 error = 0; 157 158 /* check prototypes of mpfr_init_set_* */ 159 inexact = mpfr_init_set_si (x, -1, MPFR_RNDN); 160 inexact = mpfr_init_set (y, x, MPFR_RNDN); 161 inexact = mpfr_init_set_ui (z, 1, MPFR_RNDN); 162 inexact = mpfr_init_set_d (u, 1.0, MPFR_RNDN); 163 164 emax = mpfr_get_emax (); 165 set_emax (0); 166 mpfr_set_prec (x, 3); 167 mpfr_set_str_binary (x, "0.111"); 168 mpfr_set_prec (y, 2); 169 mpfr_set (y, x, MPFR_RNDU); 170 if (!(MPFR_IS_INF (y) && MPFR_SIGN (y) > 0)) 171 { 172 printf ("Error for y=x=0.111 with px=3, py=2 and emax=0\nx="); 173 mpfr_dump (x); 174 printf ("y="); 175 mpfr_dump (y); 176 exit (1); 177 } 178 179 set_emax (emax); 180 181 mpfr_set_prec (y, 11); 182 mpfr_set_str_binary (y, "0.11111111100E-8"); 183 mpfr_set_prec (x, 2); 184 mpfr_set (x, y, MPFR_RNDN); 185 mpfr_set_str_binary (y, "1.0E-8"); 186 if (mpfr_cmp (x, y)) 187 { 188 printf ("Error for y=0.11111111100E-8, prec=2, rnd=MPFR_RNDN\n"); 189 exit (1); 190 } 191 192 mpfr_clear (x); 193 mpfr_clear (y); 194 mpfr_clear (z); 195 mpfr_clear (u); 196 197 check_ternary_value (); 198 check_special (); 199 check_neg_special (); 200 201 test_generic (2, 1000, 10); 202 203 tests_end_mpfr (); 204 return error; 205 } 206