std::fegetexceptflag, std::fesetexceptflag

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C++ Standard Library
Language Utilities library Strings library Containers library Algorithms library Iterators library Numerics library Input/output library Localizations library Regular expressions library (C++11) Atomic operations library (C++11) Thread support library (C++11)
Numerics library
Common mathematical functions Floating-point environment Complex numbers Numeric arrays Pseudo-random number generation Compile-time rational arithmetic (C++11) Generic numeric operations iota (C++11) accumulate inner_product adjacent_difference partial_sum
Floating-point environment
feclearexcept (C++11) fetestexcept (C++11) feraiseexcept (C++11) fegetexceptflag fesetexceptflag (C++11) (C++11) fegetround (C++11) fesetround (C++11) fegetenv (C++11) feholdexcept (C++11) fesetenv (C++11) feupdateenv (C++11) FE_ALL_EXCEPT FE_DIVBYZERO FE_INEXACT FE_INVALID FE_OVERFLOW FE_UNDERFLOW (C++11) FE_DOWNWARD FE_TONEAREST FE_TOWARDZERO FE_UPWARD (C++11) FE_DFL_ENV (C++11)

Defined in header <cfenv>
int fegetexceptflag(std::fexcept_t* flagp, int excepts);	(1)	(since C++11)
int fesetexceptflag(const std::fexcept_t* flagp, int excepts);	(2)	(since C++11)

1) Attempts to obtain the full contents of the floating-point exception flags that are listed in the bitmask argument excepts, which is a bitwise OR of the floating point exception macros.

2) Attempts to copy the full contents of the floating-point exception flags that are listed in excepts from flagp into the floating-point environment. Does not raise any exceptions, only modifies the flags.

The full contents of a floating-point exception flag is not necessarily a boolean value indicating whether the exception is raised or cleared. For example, it may be a struct which includes the boolean status and the address of the code that triggered the exception. This function obtains all such content and stored it in flagp in implementation-defined format.

[edit] Parameters

flagp	-	pointer to an std::fexcept_t object where the flags will be stored or read from
excepts	-	bitmask listing the exception flags to get/set

[edit] Return value

​0​ on success, non-zero otherwise.