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/* Test for exception handling functions of libm */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE
#endif
#include <complex.h>
#include <math.h>
#include <float.h>
#include <fenv.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/*
Since not all architectures might define all exceptions, we define
a private set and map accordingly.
*/
#define NO_EXC 0
#define INEXACT_EXC 0x1
#define DIVBYZERO_EXC 0x2
#define UNDERFLOW_EXC 0x04
#define OVERFLOW_EXC 0x08
#define INVALID_EXC 0x10
#define ALL_EXC \
(INEXACT_EXC | DIVBYZERO_EXC | UNDERFLOW_EXC | OVERFLOW_EXC | \
INVALID_EXC)
static int count_errors;
/* Test whether a given exception was raised. */
static void
test_single_exception (short int exception,
short int exc_flag,
fexcept_t fe_flag,
const char *flag_name)
{
if (exception & exc_flag)
{
if (fetestexcept (fe_flag))
printf (" Pass: Exception \"%s\" is set\n", flag_name);
else
{
printf (" Fail: Exception \"%s\" is not set\n", flag_name);
++count_errors;
}
}
else
{
if (fetestexcept (fe_flag))
{
printf (" Fail: Exception \"%s\" is set\n", flag_name);
++count_errors;
}
else
{
printf (" Pass: Exception \"%s\" is not set\n", flag_name);
}
}
}
static void
test_exceptions (const char *test_name, short int exception)
{
printf ("Test: %s\n", test_name);
#ifdef FE_DIVBYZERO
test_single_exception (exception, DIVBYZERO_EXC, FE_DIVBYZERO,
"DIVBYZERO");
#endif
#ifdef FE_INVALID
test_single_exception (exception, INVALID_EXC, FE_INVALID,
"INVALID");
#endif
#ifdef FE_INEXACT
test_single_exception (exception, INEXACT_EXC, FE_INEXACT,
"INEXACT");
#endif
#ifdef FE_UNDERFLOW
test_single_exception (exception, UNDERFLOW_EXC, FE_UNDERFLOW,
"UNDERFLOW");
#endif
#ifdef FE_OVERFLOW
test_single_exception (exception, OVERFLOW_EXC, FE_OVERFLOW,
"OVERFLOW");
#endif
}
static void
set_single_exc (const char *test_name, int fe_exc, fexcept_t exception)
{
char str[200];
strcpy (str, test_name);
strcat (str, ": set flag, with rest not set");
feclearexcept (FE_ALL_EXCEPT);
feraiseexcept (exception);
test_exceptions (str, fe_exc);
strcpy (str, test_name);
strcat (str, ": clear flag, rest also unset");
feclearexcept (exception);
test_exceptions (str, NO_EXC);
strcpy (str, test_name);
strcat (str, ": set flag, with rest set");
feraiseexcept (FE_ALL_EXCEPT ^ exception);
feraiseexcept (exception);
test_exceptions (str, ALL_EXC);
strcpy (str, test_name);
strcat (str, ": clear flag, leave rest set");
feclearexcept (exception);
test_exceptions (str, ALL_EXC ^ fe_exc);
}
static void
fe_tests (void)
{
/* clear all exceptions and test if all are cleared */
feclearexcept (FE_ALL_EXCEPT);
test_exceptions ("feclearexcept (FE_ALL_EXCEPT) clears all exceptions",
NO_EXC);
/* raise all exceptions and test if all are raised */
feraiseexcept (FE_ALL_EXCEPT);
test_exceptions ("feraiseexcept (FE_ALL_EXCEPT) raises all exceptions",
ALL_EXC);
feclearexcept (FE_ALL_EXCEPT);
#ifdef FE_DIVBYZERO
set_single_exc ("Set/Clear FE_DIVBYZERO", DIVBYZERO_EXC, FE_DIVBYZERO);
#endif
#ifdef FE_INVALID
set_single_exc ("Set/Clear FE_INVALID", INVALID_EXC, FE_INVALID);
#endif
#ifdef FE_INEXACT
set_single_exc ("Set/Clear FE_INEXACT", INEXACT_EXC, FE_INEXACT);
#endif
#ifdef FE_UNDERFLOW
set_single_exc ("Set/Clear FE_UNDERFLOW", UNDERFLOW_EXC, FE_UNDERFLOW);
#endif
#ifdef FE_OVERFLOW
set_single_exc ("Set/Clear FE_OVERFLOW", OVERFLOW_EXC, FE_OVERFLOW);
#endif
}
int
main (void)
{
fe_tests ();
/* _LIB_VERSION = _SVID;*/
if (count_errors)
{
printf ("\n%d errors occured.\n", count_errors);
exit (1);
}
printf ("\n All tests passed successfully.\n");
exit (0);
}
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