Memory management for client API

Hi,

I'm trying to implement a LDAP client. I see that functions like ldap_search_ext_s() may dynamically allocate memory.

Is there a way to supply my own memory allocation functions for open-ldap API? I'm asking because I would like to allocate memory during initialization, not during run time.

Else, how can I calculate the max amount of memory that such calls will require? What should happen if not enough memory is available when a function like ldap_search_ext_s() gets called? Is there a special error code that indicates that?

Thanks, Erez