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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;
+}