Practical Usage of MVS REXX

Practical Usage of MVS REXX provides a concise and complete source of information for the development of applications using the REXX language - IBM's systems application architecture procedural language. The book adopts a highly practical approach and includes many lists and diagrams to make finding the relevant information as easy to find and use as possible. It particularly emphasises the interfacing capabilities of REXX. Both beginners and experts will find the book useful. Beginners are led through the steps required to develop REXX applications via a series of worked examples, and experts will find a complete and easy reference to the language.

1. Introduction.- 1.1 rexx background.- 1.2 rexx characteristics.- 1.3 rexx applications.- 1.4 REXX's future.- 2. REXX Facilities.- 2.1 Introduction.- 2.2 rexx structure.- 2.3 rexx expressions.- 2.4 Statements.- 2.5 Invocation of a rexx exec.- 2.6 Comparison with CLISTS.- 3. REXX Processing Elements.- 3.1 Introduction.- 3.2 Statements.- 3.3 Routines.- 3.4 Types of instruction.- 3.5 Control processing flow.- 3.6 Assignment.- 3.7 Stack (queue) processing.- 3.8 Parsing.- 3.9 Debugging.- 3.10 Miscellaneous instructions.- 3.11 Commands.- 3.12 Special variables.- 4. REXX Instructions.- 4.1 Introduction.- 4.2 Instruction descriptions.- 4.3 Examples.- 5. Exception Handling.- 5.1 Introduction.- 5.2 Condition traps.- 5.3 Explicit invocation.- 6. String Processing.- 6.1 Introduction.- 6.2 Word parsing.- 6.3 Delimiter parsing.- 6.4 Positional parsing.- 6.5 Dynamic parsing.- 6.6 Argument parsing.- 6.7 Worked examples.- 7. Numbers and Arithmetic.- 7.1 Introduction.- 7.2 Number.- 7.3 Arithmetic operators.- 7.4 Precision and representation.- 7.5 Sequence of operations.- 7.6 Numeric formatting.- 8. Input/Output.- 8.1 Introduction.- 8.2 Data buffering.- 8.3 Opening and closing the data files.- 8.4 Terminal operations.- 8.5 File-mode operations.- 9. Debugging.- 9.1 Introduction.- 9.2 Exception conditions.- 9.3 Tracing options.- 9.4 Trace output.- 9.5 Interactive debug.- 9.6 Parametric debug.- 9.7 Errors with host commands and functions.- 10. REXX Built-in Functions.- 10.1 Introduction.- 10.2 Function definitions.- 10.3 Examples.- 11. Host REXX Commands.- 11.1 Introduction.- 11.2 Host rexx command definitions.- 11.3 Example.- 12. MVS Command Functions.- 12.1 Introduction.- 12.2 mvs command function calls.- 12.3 Invocation of other tso commands.- 12.4 Example.- 13. REXX Invocation.- 13.1Introduction.- 13.2 Invocation from TSO/ISPF.- 13.3 Invocation from batch TSO.- 13.4 Invocation from MVS.- 13.5 Linkage to the host (MVS-TSO) environment.- 13.6 Linkage to programs.- 13.7 Interface with ispexec (ISPF Dialog Manager).- 13.8 Interface with i SRED i T (ISPF/PDF Edit macro).- 13.9 Interface with DB2 (Database2).- 13.10 Interface with qmf (Query Management Facility).- 13.11 Interface from programs with REXX.- 14. System Interfaces.- 14.1 Introduction.- 14.2 General conditions.- 14.3 Invocation of a rexx exec.- 14.4 Interface from programs to rexx processor (IRXEXEC).- 14.5 Program access to rexx variables (IRXEXCOM service).- 14.6 Stack processing (IRXSTK service).- 14.7 Command interface.- 14.8 Function interface.- 14.9 Function package.- 14.10 Load routine - irxload service.- 14.11 Initialisation routine - irxinit service.- 14.12 Get result - irxrlt service.- 14.13 Control blocks.- 14.14 Examples.- 15. Worked Examples.- 15.1 Introduction.- 15.2 Worked example 1.- 15.3 Worked example 2.- 15.4 Worked example 3.- 15.5 Worked example 4.- 15.6 Worked example 5.- Appendix A. Syntax Notation.- Appendix B. Glossary.