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Diffstat (limited to 'math/basic-test.c')
| -rw-r--r-- | math/basic-test.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/math/basic-test.c b/math/basic-test.c new file mode 100644 index 0000000000..470651968b --- /dev/null +++ b/math/basic-test.c @@ -0,0 +1,123 @@ +/* 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; +} |