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