/* Test for the C++ implementation of iszero. Copyright (C) 2016 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #define _GNU_SOURCE 1 #include <math.h> #include <stdio.h> #include <limits> static bool errors; static void check (int actual, int expected, const char *actual_expr, int line) { if (actual != expected) { errors = true; printf ("%s:%d: error: %s\n", __FILE__, line, actual_expr); printf ("%s:%d: expected: %d\n", __FILE__, line, expected); printf ("%s:%d: actual: %d\n", __FILE__, line, actual); } } #define CHECK(actual, expected) \ check ((actual), (expected), #actual, __LINE__) template <class T> static void check_type () { typedef std::numeric_limits<T> limits; CHECK (iszero (T{}), 1); CHECK (iszero (T{0}), 1); CHECK (iszero (T{-0.0}), 1); CHECK (iszero (T{1}), 0); CHECK (iszero (T{-1}), 0); CHECK (iszero (limits::min ()), 0); CHECK (iszero (-limits::min ()), 0); CHECK (iszero (limits::max ()), 0); CHECK (iszero (-limits::max ()), 0); if (limits::has_infinity) { CHECK (iszero (limits::infinity ()), 0); CHECK (iszero (-limits::infinity ()), 0); } CHECK (iszero (limits::epsilon ()), 0); CHECK (iszero (-limits::epsilon ()), 0); if (limits::has_quiet_NaN) CHECK (iszero (limits::quiet_NaN ()), 0); if (limits::has_signaling_NaN) CHECK (iszero (limits::signaling_NaN ()), 0); if (limits::has_signaling_NaN) CHECK (iszero (limits::signaling_NaN ()), 0); CHECK (iszero (limits::denorm_min ()), std::numeric_limits<T>::has_denorm == std::denorm_absent); CHECK (iszero (-limits::denorm_min ()), std::numeric_limits<T>::has_denorm == std::denorm_absent); } static int do_test (void) { check_type<float> (); check_type<double> (); #ifndef NO_LONG_DOUBLE check_type<long double> (); #endif return errors; } #define TEST_FUNCTION do_test () #include "../test-skeleton.c"