Re: error code mapping best practice

[Maren Purves <m.purves@jach.hawaii.edu>]

I have something like this:

void dhsDhsErrHd (int status)
{
char string[DHS_STRING_LENGTH];

printf("DHS error: ... status: %d\n", status);
switch (status)
{
case DHS_S_CMD_BULK_SENT: strcpy (string, "Message sent as bulk data"); 
break;
case DHS_S_CMD_DELETE   : strcpy (string, "Deleting command structure"); 
break;
case DHS_S_CMD_MSG_SENT : strcpy (string, "Message sent as regular 
message"); break;
case DHS_S_CMD_NEW      : strcpy (string, "Creating command structure"); 
break;
case DHS_S_COND_TIMEOUT : strcpy (string, "Condition variable timed 
out"); break;
case DHS_S_CONNECT      : strcpy (string, "Client is requesting 
connection"); break;
case DHS_S_DISCONNECT   : strcpy (string, "Client has disconnected"); break;
case DHS_S_EL_EXIT      : strcpy (string, "Exit the event loop"); break;
case DHS_S_FN_ENTRY     : strcpy (string, "Entering function"); break;
case DHS_S_FN_EXIT      : strcpy (string, "Exiting function"); break;

[...]

lying around. This runs on an IOC and is part of the 'device support'
for FITS files - obviously you can extend the number of codes to any
enum value.

If I was to do this again today I'd probably put it into a table
(hopefully pvLoad-able) and use a genSub (I think the code above
predates genSubs, at least it predates genSubs being wide-spread).

Aloha,
Maren

Rodney R. Porter wrote:
> I have implemented similar conversions, though with considerably less than
> 300 states, using either a genSub record or SNL program.  I choose between
> them based on what is needed for other support for the device or instrument.
> Rodney Porter
>
>
> On 7/9/07 4:38 PM, "Emmanuel Mayssat" <emmanuel_mayssat@lynceantech.com>
> wrote:
>
> > Hello,
> > I have a device that returns error codes as integers (error code stored
> > in a ai record).
> > The error codes needs to be mapped to the corresponding strings.
> > I have approximately 300 error codes.
> > What would you say is the most elegant way to implement the translation?
> > Custom record? seq? etc.
> >
> > Thank you for your advice,
> > --
> > E