INTERP — A fortran callable data interpretation subroutine system

The INTERP free format data interpretation subroutine system for lexical analysis is described in this paper. This system, written in ANSI standard FORTRAN 77, is flexible, easy to use, small, and efficient. These qualities make the addition of INTERP to an application program quite simple. INTERP has been used to interpret problem oriented languages for several finite element programs operating both in batch and interactive environments on micro, supermini, and supercomputers. While INTERP is presented here in the context of translating problem oriented languages, the system has been used in several other applications including: a low-level assembler, a data manipulator, and a modular, interactive user interface system with integrated parsing and prompting.