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/* Copyright (C) 1999 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 1999.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <math.h>
#include <float.h>
#include <stdio.h>
static int errors = 0;
static void
check (const char *testname, int result)
{
if (!result) {
printf ("Failure: %s\n", testname);
errors++;
}
}
#define TEST_FUNC(NAME, FLOAT, NANFUNC, EPSILON, HUGEVAL) \
static void \
NAME (void) \
{ \
/* Variables are declared volatile to forbid some compiler \
optimizations. */ \
volatile FLOAT Inf_var, NaN_var, zero_var, one_var; \
FLOAT x1, x2; \
\
zero_var = 0.0; \
one_var = 1.0; \
NaN_var = zero_var/zero_var; \
Inf_var = one_var / zero_var; \
\
(void) &zero_var; \
(void) &one_var; \
(void) &NaN_var; \
(void) &Inf_var; \
\
\
check (#FLOAT " isinf (inf) == 1", isinf (Inf_var) == 1); \
check (#FLOAT " isinf (-inf) == -1", isinf (-Inf_var) == -1); \
check (#FLOAT " !isinf (1)", !(isinf (one_var))); \
check (#FLOAT " !isinf (NaN)", !(isinf (NaN_var))); \
\
check (#FLOAT " isnan (NaN)", isnan (NaN_var)); \
check (#FLOAT " isnan (-NaN)", isnan (-NaN_var)); \
check (#FLOAT " !isnan (1)", !(isnan (one_var))); \
check (#FLOAT " !isnan (inf)", !(isnan (Inf_var))); \
\
check (#FLOAT " inf == inf", Inf_var == Inf_var); \
check (#FLOAT " -inf == -inf", -Inf_var == -Inf_var); \
check (#FLOAT " inf != -inf", Inf_var != -Inf_var); \
check (#FLOAT " NaN != NaN", NaN_var != NaN_var); \
\
/* \
the same tests but this time with NAN from <bits/nan.h> \
NAN is a double const \
*/ \
check (#FLOAT " isnan (NAN)", isnan (NAN)); \
check (#FLOAT " isnan (-NAN)", isnan (-NAN)); \
check (#FLOAT " !isinf (NAN)", !(isinf (NAN))); \
check (#FLOAT " !isinf (-NAN)", !(isinf (-NAN))); \
check (#FLOAT " NAN != NAN", NAN != NAN); \
\
/* \
And again with the value returned by the `nan' function. \
*/ \
check (#FLOAT " isnan (NAN)", isnan (NANFUNC (""))); \
check (#FLOAT " isnan (-NAN)", isnan (-NANFUNC (""))); \
check (#FLOAT " !isinf (NAN)", !(isinf (NANFUNC ("")))); \
check (#FLOAT " !isinf (-NAN)", !(isinf (-NANFUNC ("")))); \
check (#FLOAT " NAN != NAN", NANFUNC ("") != NANFUNC ("")); \
\
/* test if EPSILON is ok */ \
x1 = 1.0; \
x2 = x1 + EPSILON; \
check (#FLOAT " 1 != 1+EPSILON", x1 != x2); \
\
x1 = 1.0; \
x2 = x1 - EPSILON; \
check (#FLOAT " 1 != 1-EPSILON", x1 != x2); \
\
/* test if HUGE_VALx is ok */ \
x1 = HUGEVAL; \
check (#FLOAT " isinf (HUGE_VALx) == +1", isinf (x1) == +1); \
x1 = - HUGEVAL; \
check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1); \
}
TEST_FUNC (float_test, float, nanf, FLT_EPSILON, HUGE_VALF)
TEST_FUNC (double_test, double, nan, DBL_EPSILON, HUGE_VAL)
#ifndef NO_LONG_DOUBLE
TEST_FUNC (ldouble_test, long double, nan, LDBL_EPSILON, HUGE_VALL)
#endif
int
main (void)
{
float_test ();
double_test ();
#ifndef NO_LONG_DOUBLE
ldouble_test ();
#endif
return errors != 0;
}
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