IBMBBCK*
IBMBBCK is a routine that concatenates character strings. The module has two functions at entry points:
IBMBBCKA: Concatenates two character strings into a target field.
IBMBBCKB: Implements the PL/I built-in function, REPEAT. REPEAT concatenates a single character string with itself a specified number of times and returns the resulting string.
Reference Sources
OS PL/I Resident Library: Program Logic, LY33-6008.