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Contents
Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Programming Interface Information ......................... xii
Trademarks and Service Marks ........................... xii
About This Guide ................................... xv
Who Should Use This Guide ............................. xv
Prerequisite and Related Information ........................ xvi
How to Send Your Comments ............................ xvi
| What's New This Release? .............................. xvii
| Changes to this Guide Since V4R2 ........................ xxi
ILE RPG Introduction ............................................ 1
Chapter 1. Overview of the RPG IV Programming Language ......... 3
RPG IV Specifications .................................. 3
Cycle Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Subprocedure logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Operation Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Example of an ILE RPG Program ........................... 6
Using the OS/400 System ............................... 12
Interacting with the System ............................ 12
AS/400 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Application Development ToolSet for AS/400 .................. 13
IBM VisualAge RPG and Cooperative Development Environment for AS/400 14
Chapter 2. RPG Programming in ILE ....................... 17
Program Creation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Program Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Program Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Source Debugging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Bindable APIs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
| Multithreaded Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Chapter 3. Program Creation Strategies ..................... 23
Strategy 1: OPM-Compatible Application . . . . . . . . . . . . . . . . . . . . . . 23
Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Example of OPM-Compatible Program ...................... 24
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Strategy 2: ILE Program Using CRTBNDRPG ................... 25
Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Example of ILE Program Using CRTBNDRPG ................. 26
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Strategy 3: ILE Application Using CRTRPGMOD ................. 27
Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Single-Language ILE Application Scenario ................... 28
Mixed-Language ILE Application Scenario .................... 29
Advanced Application Scenario .......................... 30
Related Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Copyright IBM Corp. 1994, 1999 iii