Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 8 May 2013 12:53:39 -0500

Hi Stephanie & Eric,

On 2013-05-08 Allison, Stephanie wrote:
> And to DOUBLEs also?  I'd like to see my unsigned long fields as hex but
> they come in as DOUBLE due to CA.

We already provide separate options for that:

Floating point format:
...
  -lx:      Round to long integer and print as hex number
  -lo:      Round to long integer and print as octal number
  -lb:      Round to long integer and print as binary number

Eric Norum asked:
> Would it be reasonable to apply the '-0' options to CHAR types too?

It seems like it ought to be.  I started writing that we'd have to be careful 
because dbr_char_t is a typedef for char which might be signed or unsigned, 
but I looked and it's actually not, it's a typedef for epicsUInt8 which is 
always unsigned (epicsInt8 is also unsigned on some architectures).  However 
the val2str() routine in tool_lib.c that you quoted from is still questionable 
because it prints the DBR_CHAR value from a char variable ch, which is signed 
on some architectures...  Our handling of char values as signed or unsigned is 
unfortunately neither comprehensive nor correct (there is no 8-bit field type 
which will be signed on all architectures).

- Andrew
-- 
It is difficult to get a man to understand something, when his salary
depends upon his not understanding it. -- Upton Sinclair

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System