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OpenSolaris 2009.06 - man page for fetestexcept (opensolaris section 3m)

fetestexcept(3M)					  Mathematical Library Functions					  fetestexcept(3M)

fetestexcept - test floating-point exception flags
c99 [ flag... ] file... -lm [ library... ] #include <fenv.h> int fetestexcept(int excepts);
The fetestexcept() function determines which of a specified subset of the floating-point exception flags are currently set. The excepts argument specifies the floating-point status flags to be queried.
The fetestexcept() function returns the value of the bitwise-inclusive OR of the floating-point exception macros corresponding to the cur- rently set floating-point exceptions included in excepts.
No errors are defined.
Example 1 Example using fetestexcept() The following example calls function f( ) if an invalid exception is set, and then function g( ) if an overflow exception is set: #include <fenv.h> /* ... */ { # pragma STDC FENV_ACCESS ON int set_excepts; feclearexcept(FE_INVALID | FE_OVERFLOW); // maybe raise exceptions set_excepts = fetestexcept(FE_INVALID | FE_OVERFLOW); if (set_excepts & FE_INVALID) f(); if (set_excepts & FE_OVERFLOW) g(); /* ... */ }
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+
feclearexcept(3M), fegetexceptflag(3M), fenv.h(3HEAD), attributes(5), standards(5) SunOS 5.11 12 Jul 2006 fetestexcept(3M)

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