fesetexceptflag()

Set the states of the specified floating-point status flags

Synopsis:

#include <fenv.h>

int fesetexceptflag( const fexcept_t *flagp,
                     int excepts );

Arguments:

flagp
A pointer to a fexcept_t object where the function can get the state information from.
excepts
A bitwise OR of the flags whose states you want to set; zero or more of the following:
  • FE_ALL_EXCEPT — all the bits
  • FE_DIVBYZERO — pole error
  • FE_INEXACT — inexact result; rounding was necessary
  • FE_INVALID — domain error
  • FE_OVERFLOW — result is too large to be representable
  • FE_UNDERFLOW — result is subnormal with a loss of precision

Library:

libm

Use the -l m option to qcc to link against this library.

Description:

The fesetexceptflag() function attempts to copy the states of the specified floating-point exceptions from the object pointed to by flagp. It doesn't actually raise any exceptions; it simply sets the state of the flags. The state isn't necessarily just a boolean value.

Returns:

0 if the state information was successfully set or excepts is 0, or a nonzero value if an error occurred.

Classification:

C99, POSIX 1003.1

Safety:  
Cancellation point No
Interrupt handler No
Signal handler No
Thread Yes