Sample Service Program

 

*-----------------------------------------------------------------

 

 

 

*

 

* Use the operational descriptors to determine the length￿s of

*

 

* the parameters that were passed.

 

 

*

 

*-----------------------------------------------------------------

 

 

 

*

C

 

CALLP

CEEDOD(1

 

: DescType : DataType :

C

 

 

DescInfo1 : DescInfo2: Inlen

:

C

 

 

*OMIT)

 

 

 

C

 

CALLP

CEEDOD(2

 

: DescType : DataType :

C

 

 

DescInfo1 : DescInfo2: HexLen

:

C

 

 

*OMIT)

 

 

 

 

*-----------------------------------------------------------------

 

 

 

*

 

* Determine the length to handle (minimum of the input leng￿th

*

 

* and half of the hex length)

 

 

 

*

 

*-----------------------------------------------------------------

 

 

 

*

C

 

IF

InLen > HexLen / 2

 

C

 

EVAL

InLen = HexLen / 2

 

C

 

ENDIF

 

 

 

 

 

*-----------------------------------------------------------------

 

 

 

*

 

* For each character in the input string, convert to a 2-byte￿

*

 

* hexadecimal representation (for example, '5'

--> 'F5')

*

 

*-----------------------------------------------------------------

 

 

 

*

C

 

EVAL

HexPos = 1

 

 

 

C

 

DO

InLen

Pos

 

 

C

 

EVAL

InChar = %SUBST(InString : Pos :1)

 

C

 

EXSR

GetHex

 

 

 

C

 

EVAL

%SUBST(HexString : HexPos : 2) = HexDs

C

 

EVAL

HexPos = HexPos + 2

 

C

 

ENDDO

 

 

 

 

 

*-----------------------------------------------------------------

 

 

 

*

 

* Done; return to caller.

 

 

 

*

 

*-----------------------------------------------------------------

 

 

 

*

C

 

RETURN

 

 

 

 

 

*=================================================================*

 

* GetHex - subroutine to convert 'InChar' to 'HexDs'

*

 

*

 

 

 

 

*

 

* Use division by 16 to separate the two hexadecimal digits￿.

*

 

* The quotient is the first digit, the remainder is the seco￿nd.

*

 

*=================================================================*

C

GetHex

BEGSR

 

 

 

 

C

 

EVAL

IntChar = InChar

 

 

C

IntNum

DIV

16

X1

5 0

 

C

 

MVR

 

X2

5 0

 

 

*-----------------------------------------------------------------

 

 

 

*

 

* Use the hexadecimal digit (plus 1) to substring the list of￿

*

 

* hexadecimal characters '012

...CDEF'.

 

 

*

 

*-----------------------------------------------------------------

 

 

 

*

C

 

EVAL

HexC1 = %SUBST(HexDigits:X1+1:1)

 

C

 

EVAL

HexC2 = %SUBST(HexDigits:X2+1:1)

 

C

 

ENDSR

 

 

 

 

 

 

 

 

 

Figure

42 (Part 2

of 2).

Source for Service Program CvtToHex

 

96 ILE RPG for AS/400 Programmer's Guide

Page 119 Page 121
Page 120
Image 120
IBM AS/400 manual Exsr, Enddo, Begsr Eval, Div Mvr
Page 119 Page 121

AS/400 specifications

The IBM AS/400, now known as the IBM iSeries, is a midrange computer system that has been a cornerstone of enterprise computing since its introduction in 1988. Designed to provide a robust platform for business applications, the AS/400 is celebrated for its reliability, scalability, and integrated database capabilities.

One of the key features of the AS/400 is its Integrated Operating Environment, which blends hardware and software resources seamlessly. This integration allows businesses to execute diverse workloads, ranging from traditional applications to modern web-based services, all on a single platform. The operating system, OS/400 (now IBM i), offers a rich set of APIs and tools for developers, simplifying application development and management.

Another standout characteristic of the AS/400 is its built-in database, DB2 for i. This powerful relational database management system allows for efficient data handling and provides advanced features such as support for SQL, XML, and JSON, making it easier for businesses to manage their data and integrate it with other systems. The database's tight integration with the operating system enables high performance and security.

In terms of scalability, the AS/400 can accommodate small businesses as well as large enterprises, with the ability to support hundreds of users simultaneously. Its architecture allows for easy upgrades in hardware, meaning that organizations can scale their systems without replacing the entire infrastructure.

Security is another critical attribute of the AS/400. With a sophisticated security model, it offers built-in user authentication, access control, encryption, and auditing capabilities to protect data and applications from unauthorized access.

The AS/400 also supports multiple programming languages, including RPG, COBOL, Java, and PHP, giving organizations the flexibility to choose the development tools that best fit their needs. This diversity helps maintain legacy applications while also developing new ones that leverage modern technologies.

Moreover, the platform supports both traditional green-screen interfaces and modern graphical user interfaces, allowing organizations to transition smoothly into contemporary user experience paradigms.

Overall, the IBM AS/400 stands out as a resilient, flexible, and secure computing platform that enables organizations to effectively manage their business operations, streamline processes, and adapt to changing market demands. Its unique combination of integrated features and capabilities ensures that it remains relevant in today's fast-paced technology landscape.
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