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solaris:fetestexcept.3m

fetestexcept


NAME

fetestexcept - test floating-point exception flags

SYNOPSIS

c99 [ flag… ] file-lm [ library… ]
#include <fenv.h>

int fetestexcept(int excepts);

DESCRIPTION

The fetestexcept() function determines which of a specified subset of the floating-point exception flags are currently set. The excepts argument specifies the floating-point status flags to be queried.

RETURN VALUES

The fetestexcept() function returns the value of the bitwise-inclusive OR of the floating-point exception macros corresponding to the currently set floating-point exceptions included in excepts.

ERRORS

No errors are defined.

EXAMPLES

Example 1 Example using fetestexcept()

The following example calls function f( ) if an invalid exception is set, and then function g( ) if an overflow exception is set:

#include <fenv.h>
/* … */
{
# pragma STDC FENV_ACCESS ON
int set_excepts;
feclearexcept(FE_INVALID | FE_OVERFLOW);
// maybe raise exceptions
set_excepts = fetestexcept(FE_INVALID | FE_OVERFLOW);
if (set_excepts & FE_INVALID) f();
if (set_excepts & FE_OVERFLOW) g();
/* … */
}

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:

SEE ALSO

fenv.h(3HEAD), feclearexcept(3M), fegetexceptflag(3M), attributes(7), standards(7)


solaris/fetestexcept.3m.txt · Last modified: 2023/07/19 08:57 by A User Not Logged in