61 lines
4.9 KiB
HTML
61 lines
4.9 KiB
HTML
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<meta name="abstract" content="If an alphanumeric application program uses externally described files, you can change that application program to a DBCS application program by changing the externally described files." />
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<title>Change alphanumeric application programs to DBCS application programs</title>
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<body id="rbal3chgappdbcs"><a name="rbal3chgappdbcs"><!-- --></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">Change alphanumeric application programs to DBCS application programs</h1>
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<div><p>If an alphanumeric application program uses externally described
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files, you can change that application program to a DBCS application program
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by changing the externally described files.</p>
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<div class="section"><div class="p">To convert an application program, follow these steps: <ol><li>Create a duplicate copy of the source statements for the alphanumeric
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file that you want to change.</li>
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<li>Change alphanumeric constants and literals to double-byte constants and
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literals.</li>
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<li>Change fields in the file to the open (O) data type or specify the Alternative
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Data Type (IGCALTTYP) DDS keyword so that you can enter both double-byte and
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alphanumeric data in these fields. You might want to change the length of the
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fields as the double-byte data takes more space.</li>
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<li>Store the converted file in a separate library. Give the file the same
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name as its alphanumeric version.</li>
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<li>When you want to use the changed file in a job, change the library list,
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using the Change Library List (CHGLIBL) command, for the job in which the
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file will be used. The library in which the DBCS display file is stored is
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then checked before the library in which the alphanumeric version of the file
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is stored.</li>
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</ol>
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</div>
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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="rbal3apcon.htm" title="This section describes considerations for writing applications that process double-byte data.">Application program considerations for DBCS</a></div>
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