Open System Services Library Calls Reference Manual (G06.29+, H06.08+, J06.03+)

OSS Library Calls (e - f) feupdateenv(3)
NAME
feupdateenv - Updates the floating-point environment
LIBRARY
H-series and J-series native Guardian processes: $SYSTEM.ZDLLnnn.ZCREDLL
32-bit H-series and J-series OSS processes: /G/system/zdllnnn/zcredll
64-bit H-series and J-series OSS processes: /G/system/zdllnnn/ycredll
SYNOPSIS
#include <fenv.h>
int feupdateenv(
const fenv_t *envp);
PARAMETERS
envp Points to an object set by a call to fegetenv( ) or feholdexcept(), or equals the
macro FE_DFL_ENV.
DESCRIPTION
The feupdateenv( ) function saves the currently raised floating-point exceptions in its automatic
storage, installs the floating-point environment represented by the object pointed to by the
parameter envp, and then raises the saved floating-point exceptions.
The feupdateenv( ) function can be used with the feholdexcept( ) function to hide spurious
floating-point exceptions.
NOTES
This function is implemented only for the IEEE_float floating-point option. Applications using
this function cannot be compiled if the specified floating-point option is Tandem_float.
RETURN VALUES
The feupdateenv( ) function always returns 0 (zero), indicating that all the actions were success-
fully completed.
RELATED INFORMATION
Functions: fegetenv(3), feholdexcept(3), fesetenv(3).
STANDARDS CONFORMANCE
This function conforms to the ISO/IEC 9899:1999 standard.
This function conforms to the IEEE Std 1003.1, 2004 Edition.
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