Provides access to the floating-point environment.
The following macros and functions are all implementation-defined.
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Type
(macro)
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fenv_t
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Indicates the type of the entire floating-point environment.
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fexcept_t
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Indicates the type of the floating-point status flags.
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Constant
(macro)
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FE_DIVBYZERO
FE_INEXACT
FE_INVALID
FE_OVERFLOW
FE_UNDERFLOW
FE_ALL_EXCEPT
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Indicates the values (macros) defined when the floating-point exception is supported.
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FE_DOWNWARD
FE_TONEAREST
FE_TOWARDZERO
FE_UPWARD
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Indicates the values (macros) of the floating-point rounding direction.
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FE_DFL_ENV
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Indicates the default floating-point environment of the program.
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Function
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feclearexcept
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Attempts to clear a floating-point exception.
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fegetexceptflag
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Attempts to store the state of a floating-point flag in an object.
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feraiseexcept
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Attempts to generate a floating-point exception.
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fesetexceptflag
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Attempts to set a floating-point flag.
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fetestexcept
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Checks if floating-point flags are set.
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fegetround
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Gets the rounding direction.
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fesetround
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Sets the rounding direction.
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fegetenv
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Attempts to get the floating-point environment.
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feholdexcept
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Saves the floating-point environment, clears the floating-point status flags, and sets the non-stop mode for the floating-point exceptions.
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fesetenv
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Attempts to set the floating-point environment.
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feupdateenv
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Attempts to save the floating-point exceptions in the automatic storage, set the floating-point environment, and generate the saved floating-point exceptions.
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