std:: feholdexcept
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Defined in header
<cfenv>
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||
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int
feholdexcept
(
std::
fenv_t
*
envp
)
|
(since C++11) | |
First, saves the current floating-point environment to the object pointed to by
envp
(similar to
std::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
std::feupdateenv
or
std::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 std::feupdateenv after clearing the unwanted exceptions.
Parameters
| envp | - | pointer to the object of type std:: fenv_t where the floating-point environment will be stored |
Return value
0 on success, non-zero otherwise.
See also
|
(C++11)
|
restores the floating-point environment and raises the previously raised exceptions
(function) |
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(C++11)
|
saves or restores the current floating-point environment
(function) |
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(C++11)
|
default floating-point environment
(macro constant) |
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C documentation
for
feholdexcept
|
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