Using EDT as a subroutine

The interface for calling EDT consists of the following components:

• a connection module (IEDTGLE) with multiple entry point addresses, and

• a series of control blocks which are generated with Assembler macros or C includes.

When a function is called, the corresponding entry address is called and the addresses of the required control blocks and buffers are passed to it as parameters. The number and type of the parameters are different for each function. For each function, the fields in the passed control blocks that are to be evaluated and for which entries must be supplied are specified (see sections “Statement functions” and “Logical record access functions”).