Modern Rpg III Language: With Structured Programming: Cozzi, Robert; King, Theresa; Veal, Greg; Cozzi, Robert Jr.: 9780962182501: Book: : eCampus.com

Foreword

xiii

Preface

xiv

The Evolution of RPG

xvi

Introduction

(34)

Column-Oriented Program Specifications

(1)

A Brief Language

(1)

Specification Types

(5)

RPG Components

(1)

RPG Limitations

(2)

Naming Conventions

(2)

Indicators

(3)

Indicator-less RPG Code

(2)

Indicator Usage

(1)

Workstation Function Key Response Indicators

(1)

Function Key Attention Identification Byte

(1)

Indicator Classification

(2)

Indicators to Avoid

(1)

Constants and Literal Values

(9)

Figurative Constants

(1)

Named Constants

(2)

Reserved Names

(1)

Reserved Words

(3)

Directives

(4)

Specification Formats

(70)

Specification Types

(2)

Header (Control) Specification

(1)

Header (Control) Specification Summary

(3)

File Description Specification

(6)

File Description Specification Summary

(5)

File Continuation Specification

(6)

File Continuation Specification Summary

(5)

Extension and Line Counter Specification

(3)

Extension Specification Summary

(2)

Line Counter Specification

(2)

Line Counter Specification Summary

(1)

Input Specification

(18)

Input Specification Summary

(1)

Program Described Files

(3)

Program Described File Field Descriptions

(2)

Extermally Described files

(1)

Extermally described Field Descriptions

(2)

Data Structure Specification

(2)

Data Structure Subfield Specification

(3)

Special PSDS Data Structure Subfields

(1)

Special INFDS Data Structure Subfields

(2)

Named Constant Specification

(2)

Calculation Specification

(4)

Calculation Specification Summary

(3)

Output Specification

(12)

Program Described Output File Control Entries

(3)

Program Described Output File Field Description

(4)

Externally Described Output File Control Entries

(3)

Externally Described Output File Field Description

(1)

Editing Numeric Output

(2)

Edit Words

(1)

Edit Word Construction

(1)

Edit Word Control Codes

(1)

Edit Words and Named Constants

(1)

Edit Codes

(2)

Custom Currency Symbol

101

(1)

Date Edit Code Control Summary

102

(1)

Table and Array Specification

103

(2)

The RPG Program Cycle

105

(18)

Program Initialization

106

(1)

*INZSR Subroutine

107

(4)

Detailed RPG Program Cycle Description

111

(6)

Exception/Error Handling Routine Description

117

(6)

Match Fields Routine Description

119

(1)

Overflow Routine Description

120

(1)

Look-Ahead Routine Description

121

(1)

Program Controlled File Processing

122

(1)

Operation Codes

123

(182)

Operation Code Summary

125

(2)

Unconditionable Operation Codes

127

(1)

Abbreviation Legend

128

(1)

Operation Code Syntax Diagram Summary

129

(6)

Boolean Operations

135

(1)

Operation Extender Cross Reference

136

(1)

Program Status Codes

137

(2)

File Status Error Codes

139

(4)

Standards and Conventions Used in this Chapter

143

(1)

Nested Code Illustration

144

(1)

ACQ (Acquire)

145

(2)

ADD (Add Numeric)

147

(1)

ANDxx (And Condition)

148

(1)

BEGSR (Begin Subroutine)

149

(1)

BITOF (Set Bits Off)

150

(1)

BITON (Set Bits On)

151

(2)

CABxx (Compare and Branch)

153

(1)

CALL (Call Another Program)

154

(2)

Qualified Program Name

155

(1)

CASxx (Compare and Perform Subroutine)

156

(3)

CAT (Concatenation)

159

(2)

CHAIN (Random Record Access/Read)

161

(3)

CHECK (Verify a Character String)

164

(3)

CHEKR (Verify Right to Left)

167

(2)

CLEAR (Clear Data Set)

169

(2)

CLEAR and Initial Values

169

(2)

CLOSE (Close a File)

171

(1)

COMIT (Commit)

172

(1)

COMP (Compare)

173

(1)

DEBUG (Print Debug Statement)

174

(1)

DEFN (Define a Field or Data Area)

175

(3)

DELET (Delete Data File Record)

178

(3)

DIV (Divide)

181

(2)

Do (Begin Do Loop)

183

(3)

DOUxx (Begin Do Until-Loop)

186

(2)

DOWxx (Begin Do While-Loop)

188

(2)

DSPLY (Display Workstation Message)

190

(2)

DUMP (Print Formatted Dump)

192

(1)

ELSE (Else Clause)

193

(1)

ENDxx (End Do Group, Select Group, CASxx and IFxx)

194

(1)

ENDSR (End Subroutine)

195

(2)

EXCPT (Exception Output)

197

(4)

EXFMT (Write/Read a Workstation File Format)

201

(1)

EXSR (Perform Subroutine)

202

(2)

Subroutine Considerations

203

(1)

FEOD (Force End of Data)

204

(1)

Force (Force Input Priority)

205

(1)

FREE (Deactivate an Active Program)

206

(1)

GOTO (Go To)

207

(1)

IFxx (If Conditional Comparison)

208

(4)

IN (Read in a Data Area)

212

(1)

ITER (Lterate a Loop)

213

(1)

KFLD (Key List Key Field)

214

(1)

KLIST (Key List)

215

(1)

LEAVE (Leave a Do Group)

216

(1)

LOKUP (Lookup Array or Table)

217

(2)

MxxZO (Move Zone to Zone)

219

(1)

MOVE (Copy Data Right-Adjusted)

220

(3)

MOVEA (Move Array)

223

(4)

MOVEA with Figurative Constants

226

(1)

MOVEL (Copy Data Left-Adjusted)

227

(3)

MULT (Multiply)

230

(2)

MVR (Move Remainder of Division)

232

(1)

NEXT (Force Next Input From a Specific Device File)

233

(2)

OCUR (Set/Retrieve Data Structure Occurrence)

235

(3)

OPEN (Open a File)

238

(2)

ORxx (Or Condition)

240

(1)

OUT (Output an extemal data area)

241

(1)

OTHER (Otherwise)

242

(1)

PARM (Parameter Declaration)

243

(4)

PLIST (Parameter List Declaration)

247

(3)

POST (Post Device Information)

250

(2)

READ (Read From a File)

252

(3)

READC (Read Next Changed Workstation Record)

255

(1)

READE (Read Next Record with an Equal Key)

256

(2)

READP (Read Prior Record From a Data File)

258

(3)

REDPE (Read Prior Record with an Equal Key)

261

(2)

REL (Release an Acquired Device File)

263

(1)

RESET (Reset Variable to it's Initial Value)

264

(3)

RESET and Initial Values

265

(2)

RETRN (Return to Calling Program)

267

(1)

ROLBK (Roll Back)

268

(1)

SCAN (Scan String or Array)

269

(2)

SELEC (Start In-Line CASE Group)

271

(2)

Differences between SELEC/WHxx and IFxx/ELSE

271

(2)

SETLL (Set Lower Limit)

273

(2)

SETGT (Set Greater Than)

275

(1)

SETOF (Set Off an Indicator)

276

(1)

SETON (Set On an Indicator)

277

(1)

SHTDN (Test for Shut Down Request)

278

(1)

SORTA (Sort Array)

279

(1)

SQRT (Square Root)

280

(1)

SUB (Subtract)

281

(2)

SUBST (Substring then Move Left)

283

(2)

TAG (Label)

285

(1)

TESTB (Test Bit Pattern)

286

(2)

TESTN (Test Character Field for Numeric Data)

288

(1)

TESTZ (Test the Zone of a Field)

289

(1)

TIME (Retrieve System Time and Date)

290

(1)

UNLCK (Unlock Data Area/Release Record Lock)

291

(2)

UPDAT (Update a file)

293

(2)

WHxx (In-Line CASE Selection/When True then Select)

295

(2)

WRITE (Write to a file)

297

(2)

XFOOT (Cross Foot an Array)

299

(1)

XLATE (Translate a Character String)

300

(3)

Z-ADD (Zero and Add)

303

(1)

Z-SUB (Zero and Subtract)

304

(1)

Modern Operation Code Usage

305

(22)

Optimizing

306

(1)

Indicator-Controlled Logic

307

(2)

Indicator-less Controlled Logic

309

(2)

Do Loops

311

(8)

DO Loops with Level-Break Processing

311

(1)

Do While and Do Until Operations

312

(2)

Compare and Branch

314

(1)

Compare Operation

315

(1)

Ranges, Lists, and Select and Omit

316

(3)

File Processing

319

(8)

Structured Programming

327

(20)

Top-Down Programming

329

(1)

Naming Conventions

329

(3)

Control Flow Constructs

332

(3)

Structured Operation Codes

335

(1)

Boolean Operators

335

(1)

The IF-THEN-ELSE Structure

336

(4)

The CASE Structure

340

(7)

Successive CASE Operations

342

(2)

Compare and Branch Operations

344

(3)

Modular Programming

347

(36)

Inter-module Communication

350

(1)

Parameter Passing

351

(10)

Data Area

361

(6)

Program Flexibility

367

(6)

Named Constants

370

(1)

Function Controlled Logic

370

(3)

Function Key Programming

373

(7)

Soft Coded Function Keys

380

(3)

File Processing

383

(36)

Full Procedural File Processing

384

(3)

Physical Files

387

(11)

Multiple Key Fields

389

(3)

Logical Files

392

(3)

Join-Logical Files

395

(2)

File Access

397

(1)

Read Equal Key Anomaly

397

(1)

File Operation Code Effects

398

(5)

Access Path Processing

403

(3)

Workstation Device File Processing

406

(1)

CHAIN (Random File Access)

407

(1)

OPEN and CLOSE (Open and Close a File)

408

(1)

EXFMT (Write then Read Workstation Device)

409

(1)

POST (Post Device Specific Information)

410

(1)

READ (Read a Record from a File)

411

(1)

READC (Read Next Changed Subfile Record)

412

(1)

UPDATE (Update a Record)

413

(1)

WRITE (Write a Record)

414

(1)

Interpreting the Cursor Position

415

(4)

Using Embedded SQL

419

(18)

Embedded SQL

420

(3)

SQL Preprocessor

421

(1)

Relational Database Terminology

421

(2)

Tables, Rows and Columns

423

(5)

SQL Views

424

(1)

SQL Communications Area

425

(3)

SQL Data Types

428

(6)

SQL Host Variables

428

(1)

SQL Host Structures

429

(1)

SQL SELECT

430

(1)

SQL CURSOR

431

(3)

RPG File OpCodes vs. SQL Statements

434

(3)

Exception/Error Handling

437

(18)

File Information Data Structure

438

(7)

File Status Error Codes

438

(2)

File Information Data Structure

440

(4)

Predefined INFDS Subfields

444

(1)

Program Status Error Codes

445

(2)

Program Status Data Structure

447

(3)

Exception/Error Subroutine

450

(5)

Array Processing

455

(20)

Array Handling

456

(11)

Normal Arrays

456

(5)

Loading Array Elements

461

(6)

Multiple Occurrence Data Structures

467

(8)

Example Application - Quarterly Sales Report

467

(8)

Tools and Techniques

475

(18)

Stack Manipulation

476

(3)

Parsing a Group of Words

479

(7)

Compiler Listing from DSPWRD

486

(7)

Appendix A

493

(4)

IBM AS/400 RPG/400 RPGIII Compiler Command Parmaeters

494

(3)

Appendix B Decimal Data Errors and the AS/400 RPG Compiler

497

(1)

Decimal Data Overview

498

(1)

Fix Decimal Data Errors

498

(1)

Ignore Decimal Data Error

499

(1)

Database File Models

500

(1)

Zoned Decimal Data

501

(1)

Zoned Decimal Data Errors

502

(2)

Packed Decimal Data

504

(1)

Packed Decimal Data Errors

505

(1)

Conditions for Decimal Data Errors

506

(1)

Decimal Data Error Upon Input Operation to a Database File

506

(2)

Decimal Data Errors During Calculation Specifications

508




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