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105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
/* Test of <math.h> substitute.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include <math.h>
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#ifndef NAN
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# error NAN should be defined
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choke me
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#endif
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#ifndef HUGE_VALF
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# error HUGE_VALF should be defined
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choke me
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#endif
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#ifndef HUGE_VAL
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# error HUGE_VAL should be defined
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choke me
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#endif
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#ifndef HUGE_VALL
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# error HUGE_VALL should be defined
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choke me
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#endif
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#ifndef FP_ILOGB0
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# error FP_ILOGB0 should be defined
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choke me
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#endif
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#ifndef FP_ILOGBNAN
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# error FP_ILOGBNAN should be defined
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choke me
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#endif
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#include <limits.h>
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#include "macros.h"
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#if 0
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/* Check that NAN expands into a constant expression. */
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static float n = NAN;
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#endif
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/* Compare two numbers with ==.
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This is a separate function because IRIX 6.5 "cc -O" miscompiles an
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'x == x' test. */
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static int
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numeric_equalf (float x, float y)
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{
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return x == y;
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}
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static int
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numeric_equald (double x, double y)
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{
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return x == y;
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}
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static int
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numeric_equall (long double x, long double y)
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{
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return x == y;
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}
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int
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main (void)
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{
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double d = NAN;
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double zero = 0.0;
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ASSERT (!numeric_equald (d, d));
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d = HUGE_VAL;
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ASSERT (numeric_equald (d, 1.0 / zero));
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ASSERT (numeric_equalf (HUGE_VALF, HUGE_VALF + HUGE_VALF));
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ASSERT (numeric_equald (HUGE_VAL, HUGE_VAL + HUGE_VAL));
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ASSERT (numeric_equall (HUGE_VALL, HUGE_VALL + HUGE_VALL));
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/* Check the value of FP_ILOGB0. */
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ASSERT (FP_ILOGB0 == INT_MIN || FP_ILOGB0 == - INT_MAX);
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/* Check the value of FP_ILOGBNAN. */
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ASSERT (FP_ILOGBNAN == INT_MIN || FP_ILOGBNAN == INT_MAX);
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return 0;
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}
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