NAME
fesetenv() — set floating-point environment
SYNOPSIS
#include <fenv.h>
void fesetenv(const fenv_t *envp);
DESCRIPTION
The
fesetenv()
function establishes the floating-point environment represented by
the object pointed to by
envp.
The argument
envp
must point to an object set by a call to
fegetenv()
or
feholdexcept(),
or equal the macro
FE_DFL_ENV.
Note that
fesetenv()
merely installs the state of the exception flags represented through
its argument, and does not raise these exceptions.
The ISO/ANSI C committee has approved the
fesetenv()
function for inclusion in the C9X draft standard.
To use this function, compile either with the default
-Ae
option or with the
-Aa
and
-D_HPUX_SOURCE
options. Make sure your program includes
<fenv.h>.
Link in the math library by specifying
-lm
on the compiler or linker command line.
For more information, see the
HP-UX Floating-Point Guide.
ERRORS
No errors are defined.
EXAMPLES
Store the current floating-point environment, continue on exceptions,
then restore the previous environment without raising the accumulated
exceptions.
#include <fenv.h>
/*...*/
fenv_t holdenv;
feholdexcept(&holdenv);
/* perform operations */
fesetenv(&holdenv);
Restore the default environment:
#include <fenv.h>
/*...*/
fesetenv(FE_DFL_ENV);
