Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Wed, 27 Jul 2005 12:49:49 -0500

Kay-Uwe Kasemir wrote:

Strings are the very data type where I think the end user has to see

a contiguous string. In C/C++, the (const char *) is the only common

denominator

between string classes, all of which of course based on divine revelation
but incompatible except for c_str()/CStr()/...

As long as the string API acts like it stores a contiguous string, and

provides a method that can copy the string data out into a contiguous

external buffer (and add the trailing '\0' as well that the C functions

need), you shouldn't notice the difference.

Remember my point about the CA Get request from last night - your

callback routine is presented with a property catalog that contains the

data you requested from the server. You are responsible for browsing or

traversing that catalog and extracting the data from it into your own

storage. If a property you're given is a string, you have to copy it to

your own buffer anyway. Why do you care how the

	value.getCstr(mybuffer, maxlen)

method (or whatever we call it) works internally to copy that data into

your buffer?

- Andrew
--
Podiabombastic: The tendency to shoot oneself in the foot.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System