Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 28 Jul 2017 12:04:48 -0500

On 07/28/2017 11:51 AM, Till Straumann wrote:
> I see that some places (e.g., dbAccess.c: getLinkValue()) impose a limit
> of MAX_STRING_SIZE (still 40).
> How does that play with the PVNAME_STRINGSZ of 61 (base 3.15.5) ?

The use of MAX_STRING_SIZE in dbAccess.c: getLinkValue() is not related
to the PV name length, it's just that a DBF_STRING type is (and will
probably always have to be) fixed at 40 characters. You can use a
DBR_CHAR array type to get strings of any length through the dbAccess
dbGet() API, it does correctly adjust for any length of the underlying
DBF_STRING field (e.g. CALC fields are currently 80 chars).

- Andrew

> On 07/28/2017 08:44 AM, Ralph Lange wrote:
> 
>> Since this may break existing IOCs, I do not expect your suggestion to
>> be accepted into upstream Base easily.
>>
>> Allowing record names of arbitrary length (i.e. allocated) would not
>> increase memory consumption for existing installations, but needs a
>> lot more drastic code changes in crucial places of Base, of course.

+1

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System