1 /* Test of rounding towards zero. 2 Copyright (C) 2007-2014 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ 18 19 #include <config.h> 20 21 #include <math.h> 22 23 #include "signature.h" 24 SIGNATURE_CHECK (trunc, double, (double)); 25 26 #include "isnand-nolibm.h" 27 #include "minus-zero.h" 28 #include "infinity.h" 29 #include "nan.h" 30 #include "macros.h" 31 32 int main()33main () 34 { 35 /* Zero. */ 36 ASSERT (trunc (0.0) == 0.0); 37 ASSERT (trunc (minus_zerod) == 0.0); 38 /* Positive numbers. */ 39 ASSERT (trunc (0.3) == 0.0); 40 ASSERT (trunc (0.7) == 0.0); 41 ASSERT (trunc (1.0) == 1.0); 42 ASSERT (trunc (1.5) == 1.0); 43 ASSERT (trunc (1.999) == 1.0); 44 ASSERT (trunc (2.0) == 2.0); 45 ASSERT (trunc (65535.999) == 65535.0); 46 ASSERT (trunc (65536.0) == 65536.0); 47 ASSERT (trunc (2.341e31) == 2.341e31); 48 /* Negative numbers. */ 49 ASSERT (trunc (-0.3) == 0.0); 50 ASSERT (trunc (-0.7) == 0.0); 51 ASSERT (trunc (-1.0) == -1.0); 52 ASSERT (trunc (-1.5) == -1.0); 53 ASSERT (trunc (-1.999) == -1.0); 54 ASSERT (trunc (-2.0) == -2.0); 55 ASSERT (trunc (-65535.999) == -65535.0); 56 ASSERT (trunc (-65536.0) == -65536.0); 57 ASSERT (trunc (-2.341e31) == -2.341e31); 58 /* Infinite numbers. */ 59 ASSERT (trunc (Infinityd ()) == Infinityd ()); 60 ASSERT (trunc (- Infinityd ()) == - Infinityd ()); 61 /* NaNs. */ 62 ASSERT (isnand (trunc (NaNd ()))); 63 64 return 0; 65 } 66