COBOL calls HLASM, XC Instruction
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Content Swap of Data Fields COBOL calls HLASM, XC Instruction |
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Introduction
This test case shows how to swap the content of two data strings (or fields) without using a 3rd intermediary field as a holding space. The primary program is a COBOL program. This program calls an Assembler routine (HLASM) to do the field swap.
This test case contains one JCL member to execute the COBOL program. The main COBOL program (LORXORC0.cbl) is used to create the data strings and call the HLASM routine (AIXC00A1.mlc)to do the field swap. The Exclusive OR instruction (XC) is used to do the field swap. This test case may run as a batch job on an IBM Mainframe System running ZOS or a Windows System running Micro Focus Enterprise Server. A Windows command file is provided to run the job on a Windows System using Micro Focus technology.
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All Rights Reserved
Call Interface
The callable interface requires three (3) parameters, two data strings and a length value.
This section illustrates an XOR using two data strings with a length of twenty-six (26) characters. The following shows the data structures that are passed to the XOR routine.
01 A-Z-TEXT pic X(26) value 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
01 Z-A-TEXT pic X(26) value 'ZYXWVUTSRQPONMLKJIHGFEDCBA'.
. . .
. . .
The following shows the call to the XOR routine.
. . .
. . .
add 26 to ZERO giving XOR-LENGTH-A-01
call 'AIXC00A1' using A-Z-TEXT Z-A-TEXT XOR-LENGTH-A-01
call 'AIXC00A1' using Z-A-TEXT A-Z-TEXT XOR-LENGTH-A-01
call 'AIXC00A1' using A-Z-TEXT Z-A-TEXT XOR-LENGTH-A-01
The preceding snippet of code shows three (3) calls to the XOR routine. The 1st call and 3rd call are the same. The 2nd call has the sequence of the data strings reversed. Executing an exclusive OR three times in this sequence will cause the content of the two data strings to be swapped.
The following is the expected result that is posted to SYSOUT by the mainline COBOL program that calls the Assembler program.
* LORXORC0 Content Swap, Two Data Strings XOR v08.06.05 http://www.simotime.com * LORXORC0 Copyright 1987-2017 SimoTime Technologies All Rights Reserved ABCDEFGHIJKLMNOPQRSTUVWXYZ-ZYXWVUTSRQPONMLKJIHGFEDCBA ZYXWVUTSRQPONMLKJIHGFEDCBA-ABCDEFGHIJKLMNOPQRSTUVWXYZ * LORXORC0 Complete RC=00000
The CMD Member
The following is the Windows Command file (LORXORW0.cmd) that is required to run as a job on a Windows System using Micro Focus Technology.
@echo OFF
rem * *******************************************************************
rem * LORXORW0.cmd - a Windows Command File *
rem * This program is provided by SimoTime Technologies *
rem * (C) Copyright 1987-2019 All Rights Reserved *
rem * Web Site URL: http://www.simotime.com *
rem * e-mail: helpdesk@simotime.com *
rem * *******************************************************************
rem *
rem * Text - Test Case for XOR Logical Operator Routine.
rem * Author - SimoTime Technologies
rem * Date - December 15, 2016
rem *
rem * This set of programs illustrates the use a HLASM program to do
rem * an Exclusive OR (XOR) function.
rem *
rem * ************
rem * * LORXORW0 *
rem * ********cmd*
rem * *
rem * *
rem * ************ ************
rem * * LORXORC0 *------* SYSOUT *
rem * ********cbl* ************
rem * * *
rem * * * ************
rem * * *--call--* AIXOR0A1 *
rem * * ******hlasm*
rem * *
rem * ************
rem * * EOJ *
rem * ************
rem *
rem * *******************************************************************
rem * Step 1, Prepare the Environment...
rem *
set CmdName=LORXORW0
call ..\ENV1BASE %CmdName%
if "%SYSLOG%" == "" set syslog=c:\SimoLIBR\LOGS\SimoTime.LOG
set JobStatus=0000
rem *
call SimoNOTE "*******************************************************%CmdName%"
call SimoNOTE "Starting JobName %CmdName%"
rem *
rem * *******************************************************************
rem * Step 2, Execute the XOR Test Program...
call SimoNOTE "Continue JobName %CmdName% Execute the XOR Test Program"
run LORXORC0
if not ERRORLEVEL = 0 set JobStatus=0010
if not %JobStatus% == 0000 goto :EojNok
rem *
rem * *******************************************************************
rem * Step 3, End-of-Job Processing...
:EojAok
call SimoNOTE "Finished JobName %CmdName%, Job Status is %JobStatus%"
goto :End
:EojNok
call SimoNOTE "ABENDING JobName %CmdName%, Job Status is %JobStatus%"
:End
if not "%1" == "nopause" pause
The JCL Member
The following is the mainframe JCL member (LORXORJ0.jcl) that is required to run as a job on an IBM Mainframe System using ZOS or a Windows System using Micro Focus Technology.
//LORXORJ0 JOB SIMOTIME,'CBL BIT MANIPULATE',CLASS=1,MSGCLASS=0, // NOTIFY=CSIP1 //* ******************************************************************* //* LORXORJ0.jcl - a JCL Member for Batch Job Processing * //* This JCL member is provided by SimoTime Technologies * //* (C) Copyright 1987-2019 All Rights Reserved * //* Web Site URL: http://www.simotime.com * //* e-mail: helpdesk@simotime.com * //* ******************************************************************* //* //* Text - COBOL calls HLASM for XOR Function //* Author - SimoTime Technologies //* Date - January 01, 1989 //* //* This set of programs illustrates the use an HLASM program to do //* an Exclusive OR (XOR) function. //* //* The DD statement for SYSOUT is required by this example. The //* COBOL program may be compiled using the SYSOUT directive and //* without the DD statement for SYSOUT an RTS173 or RTS227 may occur. //* //* This set of programs may be compiled and executed on a Mainframe //* System with ZOS or a Windows System with Micro Focus //* Enterprise Developer. //* //* ************ //* * LORXORJ0 * //* ********jcl* //* * //* * //* ************ ************ //* * LORXORC0 *------* SYSOUT * //* ********cbl* ************ //* * * //* * * ************ //* * *--call--* AIXOR0A1 * //* * ******hlasm* //* * //* ************ //* * EOJ * //* ************ //* //* ******************************************************************* //* Step 1 of 1, This is a single step job. //* //LORXORS1 EXEC PGM=LORXORC0 //STEPLIB DD DSN=SIMOTIME.DEMO.LOADLIB1,DISP=SHR //SYSOUT DD SYSOUT=* //*
The Source Members
There are two (2) members in this suite of programs, a COBOL mainline (or driver) program and a callable HLASM routine that does the field XOR function.
COBOL Driver Program
This COBOL program (LORXORC0.cbl) was written to test the callable HLASM program (AIXC00A1.mlc) that does the Exclusive OR (XOR) Function
IDENTIFICATION DIVISION.
PROGRAM-ID. LORXORC0.
AUTHOR. SIMOTIME TECHNOLOGIES.
*****************************************************************
* SOURCE MODULE LORXORC0.CBL
*****************************************************************
* LORXORC0 - Driver program, XOR Function Test.
*
* DESCRIPTION
* -----------
* This program will do an XOR of two data strings.
*
* This program is one of a suite of Logical Operator Routines.
* LORANDC1 calls STANDPGM to perform a logical AND Function.
* LORORRC1 calls STORRPGM to perform a logical OR Function.
* LORXORC1 calls STXORPGM to perform an Exclusive OR Function.
* LORXORC0 calls AIXC00A1 to perform an Exclusive OR Function.
*
*****************************************************************
* MAINTENANCE
* -----------
* 1999/03/89 SimoTime, Created program.
* 1999/03/89 SimoTime, No changes to date.
*
*****************************************************************
ENVIRONMENT DIVISION.
*****************************************************************
DATA DIVISION.
WORKING-STORAGE SECTION.
*****************************************************************
* Data-structure for Title and Copyright...
* ------------------------------------------------------------
01 SIM-TITLE.
05 T1 pic X(11) value '* LORXORC0 '.
05 T2 pic X(34) value 'Content Swap, Two Data Strings XOR'.
05 T3 pic X(10) value ' v08.06.05'.
05 T4 pic X(24) value ' http://www.simotime.com'.
01 SIM-COPYRIGHT.
05 C1 pic X(11) value '* LORXORC0 '.
05 C2 pic X(20) value 'Copyright 1987-2019 '.
05 C3 pic X(28) value ' SimoTime Technologies '.
05 C4 pic X(20) value ' All Rights Reserved'.
01 XOR-ONE-BYTE-STRUCTURE.
05 XOR-SOURCE-A-01 pic X value LOW-VALUE.
05 XOR-TARGET-A-01 pic X value LOW-VALUE.
05 XOR-LENGTH-A-01 pic 9(4) COMP value 0.
01 A-Z-TEXT pic X(26) value 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'.
01 Z-A-TEXT pic X(26) value 'ZYXWVUTSRQPONMLKJIHGFEDCBA'.
*****************************************************************
PROCEDURE DIVISION.
perform POST-STARTUP-INFO-TO-SYSOUT
perform TEST-CASE-02
display '* LORXORC0 Complete RC=' RETURN-CODE upon console
display '* LORXORC0 Complete RC=' RETURN-CODE
GOBACK.
*****************************************************************
TEST-CASE-02.
* Use the Exclusive OR (XOR) function to swap the contents of
* two data strings. This is accomplished by doing three (3)
* XOR's of the two data strings. The second XOR has the
* sequence of the data strings reversed.
*
* =========A-Z-TEXT========= =========Z-A-TEXT=========
* Before ABCDEFGHIJKLMNOPQRSTUVWXYZ ZYXWVUTSRQPONMLKJIHGFEDCBA
* After ZYXWVUTSRQPONMLKJIHGFEDCBA ABCDEFGHIJKLMNOPQRSTUVWXYZ
*
display A-Z-TEXT '-' Z-A-TEXT
add 26 to ZERO giving XOR-LENGTH-A-01
call 'AIXC00A1' using A-Z-TEXT Z-A-TEXT XOR-LENGTH-A-01
call 'AIXC00A1' using Z-A-TEXT A-Z-TEXT XOR-LENGTH-A-01
call 'AIXC00A1' using A-Z-TEXT Z-A-TEXT XOR-LENGTH-A-01
display A-Z-TEXT '-' Z-A-TEXT
exit.
*****************************************************************
POST-STARTUP-INFO-TO-SYSOUT.
display SIM-TITLE
display SIM-COPYRIGHT
exit.
HLASM Callable Routine
The original version of this program (AIXC00A1) was created on an IBM Mainframe System and was written in IBM Assembler/H and later recompiled using HLASM. A replacement program was required when it was necessary to move a segment of a business application to a Windows System.
AIXC00A1 CSECT
***********************************************************************
* AIXC00A1.MLC - This is an HLASM Program *
* Provided by SimoTime Technologies *
* (C) Copyright 1987-2019 All Rights Reserved *
* Web Site URL: http://www.simotime.com *
* e-mail: helpdesk@simotime.com *
***********************************************************************
* *
* Created: 1988/06/01, Simmons *
* Changed: 1993/03/01, Simmons, Migrate to Micro Focus *
* *
***********************************************************************
* *
* This program will run on an IBM Mainframe using MVS or a PC using *
* Micro Focus Mainframe Express, version 2.5 or later (MFE) with *
* the Assembler Option. *
* *
* This program provides an example of an HLASM program that *
* receives control from a COBOL program via a call. *
* *
* Using the Micro Focus Animation you can immediately see the results *
* of each instruction execution. This is a very effective way to *
* become familiar with how these techniques work. *
* *
***********************************************************************
SAVE (14,12)
BALR 12,0 PREPARE A BASE REGISTER
USING *,12 ESTABLISH BASE REGISTER
*
LTR R1,R1
BZ NOPARMS
*
LR R2,R1 * Put addr of addr list into reg-2
*
WTO '* AIXC00A1 is starting...'
*
*
L R5,0(,R2) * Use reg-5 for ADDR of Parm-1
TM 0(,R2),X'80' * Is this last parameter...
BO ABEND08 * If yes, ABEND...
*
LA R2,4(,R2) * Increment to next addr in list
L R6,0(,R2) * Use reg-6 for ADDR of Parm-2
TM 0(,R2),X'80' * Is this last parameter...
BO ABEND08 * If yes, ABEND...
*
LA R2,4(,R2) * Increment to next addr in list
L R7,0(,R2) * Use reg-7 for ADDR of Parm-3
TM 0(,R2),X'80' * Is this last parameter...
BO DOXOR * If yes, do the XOR request
B ABEND08 * else ABEND
*
*---------------------------------------------------------------------*
* Do the requested Exclusive OR Function
*
DOXOR EQU *
LH R8,0(,R7) * Get length from COBOL
SH R8,=XL2'0001' * Decrement length by 1
STH R8,BIN02 * Store Length - 1 in memory
MVC *+7(1),BIN02B * Modify XC inst with user length
XC 0(26,R6),0(R5) * Execute an Exclusive OR Function
*
*---------------------------------------------------------------------*
* NORMAL END-OF-JOB
* RETURN to the CALLING PROGRAM OR OPERATING SYSTEM
*
EOJAOK EQU *
WTO '* AIXC00A1 is returning...'
RETURN (14,12),RC=0
*
***********************************************************************
* ABENDING WITH RETURN-CODE OF 8
* RETURN to the CALLING PROGRAM OR OPERATING SYSTEM
*
ABEND08 EQU *
WTO '* AIXC00A1 is abending...RC=0008'
RETURN (14,12),RC=8
*
***********************************************************************
* Post a non-paramter message...
* RETURN to the CALLING PROGRAM OR OPERATING SYSTEM
*
NOPARMS EQU *
WTO '* AIXC00A1 called with zero parameters'
RETURN (14,12),RC=4
*
***********************************************************************
* Post a too-many-paramters message...
* RETURN to the CALLING PROGRAM OR OPERATING SYSTEM
*
TOOMANY EQU *
WTO '* AIXC00A1 called with too many parameters'
RETURN (14,12),RC=4
*
***********************************************************************
* Define Constants and EQUates
*
DS 0F + Force alignment
BIN02 EQU *
BIN02A DC XL1'00'
BIN02B DC XL1'00'
*
* Register EQUates
*
R0 EQU 0
R1 EQU 1
R2 EQU 2
R3 EQU 3
R4 EQU 4
R5 EQU 5
R6 EQU 6
R7 EQU 7
R8 EQU 8
R9 EQU 9
R10 EQU 10
R11 EQU 11
R12 EQU 12
R13 EQU 13
R14 EQU 14
R15 EQU 15
*
END
The HLASM version of the XOR program was re-written in COBOL and complies with the ANSI/85 standard and has been compiled and executed using various COBOL compilers with various dialects (OS/390, Enterprise COBOL and more).
For additional information about this program please call or send an e-mail to: helpdesk@simotime.com
Summary
This suite of programs is provided as a COBOL and HLASM programming example of one of the possible solutions when performing Boolean logic. This Test Case will perform an Exclusive OR (XOR) Function. This document may be used to assist as a tutorial for new programmers or as a quick reference for experienced programmers.
In the world of programming there are many ways to solve a problem. This documentation and software were developed and tested on systems that are configured for a SIMOTIME environment based on the hardware, operating systems, user requirements and security requirements. Therefore, adjustments may be needed to execute the jobs and programs when transferred to a system of a different architecture or configuration.
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Downloads and Links
This section includes links to documents with additional information that are beyond the scope and purpose of this document. The first group of documents may be available from a local system or via an internet connection, the second group of documents will require an internet connection.
Note: A SimoTime License is required for the items to be made available on a local system or server.
Current Server or Internet Access
The following links may be to the current server or to the Internet.
Explore Bit Manipulation using a COBOL program calling COBOL to do the accessing of individuals bits within a byte.
Explore Bit Manipulation using a COBOL program calling Assembler to do the accessing of individuals bits within a byte.
Explore How to do a logical OR Function using a COBOL program that calls a COBOL routine to do the actual logical OR of two data strings.
Explore How to do a logical AND Function using a COBOL program that calls a COBOL routine to do the actual logical AND of two data strings.
Explore How to do an Exclusive OR (XOR) using a COBOL program that calls a COBOL routine to do the actual XOR of two data strings.
Explore the COBOL Connection for more examples of COBOL programming techniques and sample code.
Explore The ASCII and EBCDIC Translation Tables. These tables are provided for individuals that need to better understand the bit structures and differences of the encoding formats.
Explore The File Status Return Codes that are used to interpret the results of accessing VSAM data sets and/or QSAM files.
Internet Access Required
A good place to start is The SimoTime Home Page for access to white papers, program examples and product information. This link requires an Internet Connection
Explore The Micro Focus Web Site for more information about products (including Micro Focus COBOL) and services available from Micro Focus. This link requires an Internet Connection.
Glossary of Terms
Explore the Glossary of Terms for a list of terms and definitions used in this suite of documents and white papers.
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