feholdexcept
From cppreference.com
| Defined in header <<fenv.h>>
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| int feholdexcept( fenv_t* envp );
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(since C99) | |
First, saves the current floating-point environment to the object pointed to by envp (similar to fegetenv), then clears all floating-point status flags, and then installs the non-stop mode: future floating-point exceptions will not interrupt execution (will not trap), until the floating-point environment is restored by feupdateenv or fesetenv.
This function may be used in the beginning of a subroutine that must hide the floating-point exceptions it may raise from the caller. If only some exceptions must be suppressed, while others must be reported, the non-stop mode is usually ended with a call to feupdateenv after clearing the unwanted exceptions.
Contents |
[edit] Parameters
| envp | - | pointer to the object of type fenv_t where the floating-point environment will be stored |
[edit] Return value
0 on success, non-zero otherwise.
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C99)
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restores the floating-point environment and raises the previously raise exceptions (function) |
| (C99)
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saves or restores the current floating point environment (function) |
| (C99)
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default floating-point environment (macro constant) |