OptiVec: V_setFPErrorHandling

V_setFPErrorHandling

Function

Define the action taken in the case of floating-point errors

Syntax C/C++	#include <VecLib.h> void V_setFPErrorHandling( int fpHandlingMode );
Syntax Pascal/Delphi	uses VecLib; type V_fphand = 0..$1717; procedure V_setFPErrorHandling( hand:V_fpHand );

Description

V_setFPErrorHandling allows to control the actions to be taken in the case of floating-point errors occurring within OptiVec functions in the debug libraries. This function has no effect in the production libraries.
A number of pre-defined constants fperrXXX is available for the construction of the desired error-handling mode:

Constant	Value	Meaning
fperrIgnore	0	Ignore all floating-point errors: handle them silently, do not print a message, continue program execution
fperrNoteDOMAIN	$0001	Print a message in case of a DOMAIN error
fperrNoteSING	$0002	Print a message in case of a SING error
fperrNoteOVERFLOW	$0003	Print a message in case of an OVERFLOW error
fperrNoteTLOSS	$0004	Print a message in case of a TLOSS error
fperrAbortDOMAIN	$0101	Abort program in case of a DOMAIN error
fperrAbortSING	$0202	Abort program in case of a SING error
fperrAbortOVERFLOW	$0303	Abort program in case of an OVERFLOW error
fperrAbortTLOSS	$0404	Abort program in case of a TLOSS error
fperrDefaultHandling	$0107	Same as fperrAbortDOMAIN or fperrNoteSING or fperrNoteOVERFLOW

Example

V_setFPErrorHandling( fperrAbortDOMAIN + fperrAbortSING + fperrAbortOVERFLOW + fperrNoteTLOSS );
In this example, program execution will be aborted (with the appropriate message) in the case of the most severe errors, DOMAIN and SING. In the case of OVERFLOW and TLOSS errors, a warning will be displayed, but program execution will be continued with default results set by the respective functions where the errors occur. The repeated occurrence of the same type of error within one and the same function will lead to only one message being generated. Subsequent errors will be treated silently.

Error handling

none

Return value

none