IBM Version 4 manual API Environments

Figure 2-3

on

page 2-4

shows

the

languages

available

on

the

AS/400

system

the parameter support that they provide. For

more

information, see

the

manual

for the specific programming language that

you

plan

to

use.

Figure

2-3. Language

Selection

Considerations —

Call

Conventions

Function

Pass

Return

Pass

by

by

Language

1

Values

2

Reference

Value

BASIC

X

ILE

C

X

X

X

VisualAge ++C

for

OS/400

X

X

X

CL

X

ILE

CL

X

COBOL

X

3

ILE

COBOL

X

X

X

MI

X

X

Pascal

X

PL/I

X

REXX

X

RPG

X

ILE

RPG

X

X

X

Notes:

1

You

cannot develop

Cross

System

Product

(CSP)

programs

on an AS/400 system.

However,

you

can

develop CSP

programs

on

a

System/370

and

run

them on

your

AS/400

system.

2

Return values

are

used

by

the

UNIX-type

APIs

and

the Dynamic Screen

Manager (DSM)

3

COBOL

provides

a by-content

phrase, but it

does

not

have

the

same

semantics

as

ILE

by-value.

API Environments

OS/400 APIs exist in several operating environments on an AS/400 system. The environments are:

Ÿ	Original	program model	(OPM)
Ÿ	Integrated Language		Environment (ILE)
Ÿ	ILE Common	Execution Environment (CEE)

ŸUNIX-type

APIs for the Original Program Model				Environment
OPM	APIs, the		initial		APIs	on AS/400, use the	following	naming conventions:
Ÿ	Start	with	the	letter		Q.
Ÿ	Are	followed by			a 2-	or 3-letter internal	component	identifier.
Ÿ	Are	limited	to	8	characters.

ŸMust be uppercase.

2-4System API Programming V4R1