1 /* Test iszero with excess precision. 2 Copyright (C) 2016-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <float.h> 20 #include <math.h> 21 #include <stdio.h> 22 23 #define TEST(TYPE, TRUE_MIN) \ 24 do \ 25 { \ 26 if (iszero (TRUE_MIN / 2)) \ 27 puts ("iszero removes excess precision for " #TYPE); \ 28 else \ 29 { \ 30 puts ("iszero fails to remove excess precision for " #TYPE); \ 31 result = 1; \ 32 } \ 33 } \ 34 while (0) 35 36 static int do_test(void)37do_test (void) 38 { 39 int result = 0; 40 41 TEST (float, FLT_TRUE_MIN); 42 TEST (double, DBL_TRUE_MIN); 43 TEST (long double, LDBL_TRUE_MIN); 44 45 return result; 46 } 47 48 #define TEST_FUNCTION do_test () 49 #include "../test-skeleton.c" 50