Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Fri, 11 Jun 2004 12:59:09 +0200

>>>>> "Dirk" == Dirk Zimoch <[email protected]> writes:

  > I suggest the following:
  > PREC >= 0 means to format the value like printf("%.*f",PREC,VAL);
  > PREC < 0  means to format the value like printf("%.*e",-PREC,VAL);

Interesting idea.

How do you make sure that existing clients do not go beserk when they
get a negative precision value from Channel Access (which they don't
expect)?

  > All tools including caget and camonitor should honor PREC.

Channel Access has the precision as part of the "graphic" structures
that contain things for graphical display clients. Getting the graphic
structure always requires a second CA call, which might be confusing
when you use the command line tools for low level debugging and expect
one caget to issue one CA get call.

But that's only meant as an explanation for the command line tools not
honouring the precision currently. If there's a strong wide interest I
would certainly consider changing the tools. BTW: Being intended for
debugging and on-the-fly use in the first place they also don't honour
display limits nor control limits.

Cheers,
Ralph

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System