192 lines
9.7 KiB
HTML
192 lines
9.7 KiB
HTML
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<meta name="DC.Title" content="Example in ILE C: Accessing a field value (initial library list)" />
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<meta name="abstract" content="This example shows how to access a field value returned from a retrieve API." />
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<meta name="description" content="This example shows how to access a field value returned from a retrieve API." />
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<meta name="DC.Relation" scheme="URI" content="opmScenario.htm" />
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<meta name="DC.Relation" scheme="URI" content="cmnFieldRPG.htm" />
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<title>Example in ILE C: Accessing a field value (initial library list)</title>
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</head>
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<body id="cmnFieldILEC"><a name="cmnFieldILEC"><!-- --></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 C: Accessing a field value (initial library list)</h1>
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<div><p>This example shows how to access a field value returned
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from a 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.</p>
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<pre>/***********************************************************************/
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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: ILE C */
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/* */
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/*Description: This example shows how to access a field */
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/* value returned from a retrieve API. */
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/* */
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/*Header Files Included: STDIO - Standard Input/Output */
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/* STRING - String Functions */
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/* QUSEC - Error Code Parameter */
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/* QWDRJOBD - Retrieve Job Description API */
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/* QLIEPT - Entry Point Table */
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/* */
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/***********************************************************************/
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/***********************************************************************/
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#include <stdio.h>
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#include <string.h>
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#include <qusec.h> /* Error Code Parameter Include for the APIs */
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#include <qwdrjobd.h> /* Retrieve Job Description API Include */
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#include <qliept.h> /* Entry Point Table Include */
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/***********************************************************************/
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/* Error Code Structure */
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/* */
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/* This shows how the user can define the variable-length portion of */
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/* error code for the exception data. */
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/* */
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/***********************************************************************/
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typedef struct {
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Qus_EC_t ec_fields;
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char Exception_Data[100];
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} error_code_t;
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/***********************************************************************/
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/* JOBD0100 Structure */
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/* */
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/* This shows how the user can define the variable-length portion of */
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/* the JOBD0100 format. */
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/* */
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/***********************************************************************/
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typedef struct {
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Qwd_JOBD0100_t data;
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char Lib_Data[5000]; <span class="uicontrol">(1)</span> <span class="uicontrol">(2)</span>
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} JOBD0100;
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main(int argc, char *argv[])
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{
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error_code_t error_code;
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char library[10];
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char qual_job_desc[20];
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char *qual_job_ptr = qual_job_desc;
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char rec_var[1000];
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char *rec_ptr = rec_var;
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char hold_value[10];
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char message_id[7];
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char command_string[49];
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int i;
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int num_libs;
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int offset;
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int rec_len = 5000;
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memset(hold_value, ' ', 10);
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/*********************************************************************/
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/* Make sure we received the correct number of parameters. The argc */
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/* parameter will contain the number of parameters that was passed */
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/* to this program. This number also includes the program itself, */
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/* so we need to evaluate argc-1. */
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/*********************************************************************/
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if (((argc - 1) < 2) || ((argc - 1 > 2)))
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/*********************************************************************/
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/* We did not receive all of the required parameters so exit the */
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/* program. */
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/*********************************************************************/
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{
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exit(1);
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}
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/*********************************************************************/
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/* Move the two parameter passed into qual_job_desc. */
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/*********************************************************************/
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memcpy(qual_job_ptr, argv[1], 10);
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qual_job_ptr += 10;
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memcpy(qual_job_ptr, argv[2], 10);
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/*********************************************************************/
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/* Set the error code parameter to 16. */
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/*********************************************************************/
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error_code.ec_fields.Bytes_Provided = 16;
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/*********************************************************************/
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/* Call the QWDRJOBD API. */
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/*********************************************************************/
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QWDRJOBD(rec_var, /* Receiver Variable */
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rec_len, /* Receiver Length */
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"JOBD0100", /* Format Name */
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qual_job_desc, /* Qualified Job Description */
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&error_code); /* Error Code */
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/*********************************************************************/
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/* If an error was returned, send an error message. */
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/*********************************************************************/
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if(error_code.ec_fields.Bytes_Available > 0)
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{
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/* In this example, nothing was done for the error condition. */
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}
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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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else
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{
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num_libs = ((JOBD0100 *)rec_var)->data.Number_Libs_In_Lib_list;
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offset = ((JOBD0100 *)rec_var)->data.Offset_Initial_Lib_List;
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/*******************************************************************/
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/* Advance receiver variable pointer to the location where the */
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/* library list begins. */
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/*******************************************************************/
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rec_ptr += offset;
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for(i=0; i<num_libs; i++)
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{
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memcpy(library, rec_ptr, 10);
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sprintf(command_string,
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"SNDMSG MSG('LIBRARY %.10s') TOUSR(QPGMR)",
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library);
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system(command_string);
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rec_ptr += 11;
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if((offset + 10) >= rec_len)
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break;
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offset += 11;
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}
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}
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} /* main */</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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</body>
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