Difference between revisions of "cpp/header/cfenv"
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This header is part of the [[cpp/numeric/fenv|floating-point environment]] library. | This header is part of the [[cpp/numeric/fenv|floating-point environment]] library. | ||
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===Types=== | ===Types=== | ||
Revision as of 06:34, 12 July 2022
This header was originally in the C standard library as <fenv.h>.
This header is part of the floating-point environment library.
Contents |
Types
| fenv_t | The type representing the entire floating-point environment |
| fexcept_t | The type representing all floating-point status flags collectively |
Functions
| (C++11) |
clears the specified floating-point status flags (function) |
| (C++11) |
determines which of the specified floating-point status flags are set (function) |
| (C++11) |
raises the specified floating-point exceptions (function) |
| (C++11)(C++11) |
copies the state of the specified floating-point status flags from or to the floating-point environment (function) |
| (C++11)(C++11) |
gets or sets rounding direction (function) |
| (C++11) |
saves or restores the current floating-point environment (function) |
| (C++11) |
saves the environment, clears all status flags and ignores all future errors (function) |
| (C++11) |
restores the floating-point environment and raises the previously raised exceptions (function) |
Macros
| floating-point exceptions (macro constant) | |
| floating-point rounding direction (macro constant) | |
| (C++11) |
default floating-point environment (macro constant) |
Synopsis
namespace std { // types typedef /*object type*/ fenv_t; typedef /*integer type*/ fexcept_t; // functions int feclearexcept(int except); int fegetexceptflag(fexcept_t *pflag, int except); int feraiseexcept(int except); int fesetexceptflag(const fexcept_t *pflag, int except); int fetestexcept(int except); int fegetround(void); int fesetround(int mode); int fegetenv(fenv_t *penv); int feholdexcept(fenv_t *penv); int fesetenv(const fenv_t *penv); int feupdateenv(const fenv_t *penv); }
