LINESIZE function routine

The LINESIZE function routine, IRXLIN, lets you obtain the same value that the LINESIZE built-in function returns. LINESIZE describes the built-in function.

A program can access IRXLIN using either the CALL or LINK macro instructions, specifying IRXLIN as the entry point name. You can obtain the address of the IRXLIN routine from the REXX vector of external entry points. Format of the REXX vector of external entry points describes the vector.

If a program uses IRXLIN, it must create a parameter list and pass the address of the parameter list in register 1.

Environment Customization Considerations: If you use the IRXINIT initialization routine to initialize language processor environments, you can specify the environment in which you want IRXLIN to run. On the call to IRXLIN, you can optionally specify the address of the environment block for the environment in either the parameter list or in register 0.

For more information about specifying environments and how routines determine the environment in which to run, see Specifying the address of the environment block.