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291 lines
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<meta name="DC.Title" content="Example in ILE COBOL: Accessing a field value (initial library list)" />
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<title>Example in ILE COBOL: Accessing a field value (initial library list)</title>
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<body id="cmnFieldCOBOL"><a name="cmnFieldCOBOL"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example in ILE COBOL: Accessing a field value (initial library list)</h1>
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<div><p>This example shows how to access a field value returned from a
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retrieve API.</p>
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<div class="section"><div class="note"><span class="notetitle">Note:</span> Read the <a href="codedisclaimer.htm">Code license and disclaimer information</a> for important
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legal information.</div>
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<p>Refer to Example in OPM RPG: Accessing a field
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value (initial library list) for the original example. The following program
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also works for OPM COBOL.</p>
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<pre> IDENTIFICATION DIVISION.
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*****************************************************************
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*****************************************************************
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*
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*Program Name: JOBDAPI
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*
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*Programming Language: COBOL
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*
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*Description: This example shows how to access a
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* field value returned from a retrieve
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* API.
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*
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*Header Files Included: QUSEC - Error Code Parameter
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* QWDRJOBD - Retrieve Job Description API
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*
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*****************************************************************
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*****************************************************************
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*
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PROGRAM-ID. JOBDAPI.
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*
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ENVIRONMENT DIVISION.
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CONFIGURATION SECTION.
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SOURCE-COMPUTER. IBM-AS400.
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OBJECT-COMPUTER. IBM-AS400.
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*
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DATA DIVISION.
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WORKING-STORAGE SECTION.
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*
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* Error Code parameter include. As this sample program
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* uses COPY to include the error code structure, only the first
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* 16 bytes of the error code structure are available. If the
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* application program needs to access the variable length
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* exception data for the error, the developer should physically
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* copy the QSYSINC include and modify the copied include to
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* define additional storage for the exception data.
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*
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COPY QUSEC OF QSYSINC-QLBLSRC.
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*
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* Retrieve Job Description API Include
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*
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* The header file for the QWDRJOBD API was included in this
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* program so that the varying length portion of the structure
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* can be defined as a fixed portion.
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*
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*** START HEADER FILE SPECIFICATIONS ****************************
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*
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*Header File Name: H/QWDRJOBD
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*
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*Descriptive Name: Retrieve Job Description Information API
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*
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*5763-SS1 (C) Copyright IBM Corp. 1994,1994
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*All rights reserved.
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*US Government Users Restricted Rights -
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*Use, duplication or disclosure restricted
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*by GSA ADP Schedule Contract with IBM Corp.
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*
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*Licensed Materials-Property of IBM
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*
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*
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*Description: The Retrieve Job Description Information API
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* retrieves information from a job description
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* object and places it into a single variable in the
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* calling program.
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*
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*Header Files Included: None.
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*
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*Macros List: None.
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*
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*Structure List: Qwd_JOBD0100_t
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*
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*Function Prototype List: QWDRJOBD
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*
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*Change Activity:
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*
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*CFD List:
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*
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*FLAG REASON LEVEL DATE PGMR CHANGE DESCRIPTION
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*---- ------------ ----- ------ --------- ----------------------
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*$A0= D2862000 3D10 940424 ROCH: New Include
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*
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*End CFD List.
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*
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*Additional notes about the Change Activity
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*End Change Activity.
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*
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*** END HEADER FILE SPECIFICATIONS ******************************
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*****************************************************************
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*Prototype for QWDRJOBD API
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*****************************************************************
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77 QWDRJOBD PIC X(00010)
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VALUE "QWDRJOBD".
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*****************************************************************
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*Type Definition for the JOBD0100 format.
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**** ***
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*NOTE: The following type definition defines only the fixed
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* portion of the format. Any varying length field will
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* have to be defined by the user.
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*****************************************************************
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01 RECEIVER-VARIABLE PIC X(05000).
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01 QWD-JOBD0100 REDEFINES RECEIVER-VARIABLE.
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05 BYTES-RETURNED PIC S9(00009) BINARY.
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05 BYTES-AVAILABLE PIC S9(00009) BINARY.
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05 JOB-DESCRIPTION-NAME PIC X(00010).
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05 JOB-DESCRIPTION-LIB-NAME PIC X(00010).
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05 USER-NAME PIC X(00010).
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05 JOB-DATE PIC X(00008).
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05 JOB-SWITCHES PIC X(00008).
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05 JOB-QUEUE-NAME PIC X(00010).
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05 JOB-QUEUE-LIB-NAME PIC X(00010).
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05 JOB-QUEUE-PRIORITY PIC X(00002).
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05 HOLD-JOB-QUEUE PIC X(00010).
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05 OUTPUT-QUEUE-NAME PIC X(00010).
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05 OUTPUT-QUEUE-LIB-NAME PIC X(00010).
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05 OUTPUT-QUEUE-PRIORITY PIC X(00002).
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05 PRINTER-DEVICE-NAME PIC X(00010).
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05 PRINT-TEXT PIC X(00030).
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05 SYNTAX-CHECK-SEVERITY PIC S9(00009) BINARY.
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05 END-SEVERITY PIC S9(00009) BINARY.
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05 MESSAGE-LOG-SEVERITY PIC S9(00009) BINARY.
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05 MESSAGE-LOG-LEVEL PIC X(00001).
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05 MESSAGE-LOG-TEXT PIC X(00010).
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05 LOG-CL-PROGRAMS PIC X(00010).
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05 INQUIRY-MESSAGE-REPLY PIC X(00010).
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05 DEVICE-RECOVERY-ACTION PIC X(00013).
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05 TIME-SLICE-END-POOL PIC X(00010).
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05 ACCOUNTING-CODE PIC X(00015).
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05 ROUTING-DATA PIC X(00080).
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05 TEXT-DESCRIPTION PIC X(00050).
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05 RESERVED PIC X(00001).
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05 OFFSET-INITIAL-LIB-LIST PIC S9(00009) BINARY. <span class="uicontrol">(1)</span>
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05 NUMBER-LIBS-IN-LIB-LIST PIC S9(00009) BINARY. <span class="uicontrol">(2)</span>
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05 OFFSET-REQUEST-DATA PIC S9(00009) BINARY.
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05 LENGTH-REQUEST-DATA PIC S9(00009) BINARY.
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05 JOB-MESSAGE-QUEUE-MAX-SIZE PIC S9(00009) BINARY.
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05 JOB-MESSAGE-QUEUE-FULL-ACTION PIC X(00010).
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* 05 RESERVED2 PIC X(00001).
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*
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* Varying length
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* 05 INITIAL-LIB-LIST PIC X(00011).
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*
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*
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* Varying length
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* 05 REQUEST-DATA PIC X(00001).
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*
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* Varying length
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*
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* Command String Data Structure
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*
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01 COMMAND-STRING.
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05 TEXT1 PIC X(22) VALUE 'SNDMSG MSG(''LIBRARY- '.
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05 LIB PIC X(10).
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05 TEXT2 PIC X(15) VALUE ''') TOUSR(QPGMR)'.
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*
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01 COMMAND-LENGTH PIC S9(10)V99999 COMP-3.
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01 RECEIVER-LENGTH PIC S9(9) COMP-4.
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01 FORMAT-NAME PIC X(8) VALUE 'JOBD0100'.
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01 QCMDEXC PIC X(10) VALUE 'QCMDEXC'.
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01 X PIC S9(9) BINARY.
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*
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* Job Description and Library Name Structure
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*
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01 JOBD-AND-LIB-NAME.
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05 JOB-DESC PIC X(10).
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05 JOB-DESC-LIB PIC X(10).
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*
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LINKAGE SECTION.
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*
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* Two Parameters are being passed into this program.
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*
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01 JOBD PIC X(10).
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01 JOBDL PIC X(10).
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*
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PROCEDURE DIVISION USING JOBD, JOBDL.
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MAIN-LINE.
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*
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* Beginning of Mainline
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*
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* Move the two parameters passed into JOB-DESC and JOB-DESC-LIB.
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*
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MOVE JOBD TO JOB-DESC.
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MOVE JOBDL TO JOB-DESC-LIB.
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*
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* Error Code Parameter is set to 100.
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*
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MOVE 100 TO BYTES-PROVIDED.
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*
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* Receiver Length Set to 5000.
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*
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MOVE 5000 TO RECEIVER-LENGTH.
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*
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* Call the QWDRJOBD API.
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*
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CALL QWDRJOBD USING RECEIVER-VARIABLE, RECEIVER-LENGTH,
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FORMAT-NAME, JOBD-AND-LIB-NAME, QUS-EC.
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*
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* See if any errors were returned in the error code parameter.
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*
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PERFORM ERRCOD.
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*
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* Add one to the Initial library list offset because COBOL is a
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* Base 1 language.
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*
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MOVE OFFSET-INITIAL-LIB-LIST TO X.
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ADD 1 TO X.
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MOVE 47 TO COMMAND-LENGTH.
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*
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* Let's tell everyone what the library value was for this job.
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*
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PERFORM NUMBER-LIBS-IN-LIB-LIST TIMES
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MOVE RECEIVER-VARIABLE(X:10) TO LIB,
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CALL QCMDEXC USING COMMAND-STRING, COMMAND-LENGTH,
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ADD 11 TO X,
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PERFORM RECLEN,
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END-PERFORM.
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*
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STOP RUN.
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*
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* End of Mainline
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*
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*
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* Subroutine to handle errors returned in the error code
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* parameter.
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*
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ERRCOD.
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*
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IF BYTES-AVAILABLE OF QUS-EC > 0
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*
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* Process errors returned from the API.
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*
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STOP RUN.
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*
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* Subroutine to check to see if there is enough room in the
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* receiver variable for the next library in the list.
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*
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RECLEN.
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*
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IF (X + 10) >= RECEIVER-LENGTH
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STOP RUN.
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</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="opmScenario.htm" title="This scenario demonstrates the use of an original program model (OPM) API in several different programs.">Scenario: Original Program Model (OPM) API</a></div>
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</div>
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<div class="relref"><strong>Related reference</strong><br />
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<div><a href="cmnFieldRPG.htm" title="This sample program shows the correct way of using the offset in a user space in RPG.">Example in OPM RPG: Accessing a field value (initial library list)</a></div>
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</div>
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</div>
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