232 lines
6.4 KiB
HTML
232 lines
6.4 KiB
HTML
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="Copyright" content="Copyright (c) 2006 by IBM Corporation">
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<title>Retrieve Length of Field Data in Buffer (QsnRtvFldDtaLen) API</title>
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<!-- Begin Header Records ========================================== -->
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<link rel="stylesheet" type="text/css" href="../rzahg/ic.css">
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</head>
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<body>
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<a name="top_Of_Page"></a>
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<script language="Javascript" src="../rzahg/synch.js" type="text/javascript">
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</script>
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<h2>Retrieve Length of Field Data in Buffer (QsnRtvFldDtaLen) API</h2>
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<div class="box" style="width: 65%;">
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<br>
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Required Parameter Group:<br>
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">1</td>
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<td align="left" valign="top" width="50%">Input buffer handle</td>
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<td align="left" valign="top" width="20%">Input</td>
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<td align="left" valign="top" width="20%">Binary(4)</td>
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</tr>
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</table>
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<br>
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Omissible Parameter Group:<br>
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%">2</td>
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<td align="left" valign="top" width="50%">Length of field data</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Error code</td>
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<td align="left" valign="top">I/O</td>
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<td align="left" valign="top">Char(*)</td>
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</tr>
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</table>
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<br>
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Returned Value:<br>
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<br>
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<table width="100%">
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<tr>
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<td align="center" valign="top" width="10%"></td>
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<td align="left" valign="top" width="50%">Length of field data</td>
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<td align="left" valign="top" width="20%">Output</td>
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<td align="left" valign="top" width="20%">Binary(4)</td>
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</tr>
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</table>
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<br>
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Default Public Authority: *USE<br>
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<br>
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Service Program: QSNAPI<br>
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<br>
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Threadsafe: No<br>
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<br>
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</div>
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<p>The Retrieve Length of Field Data in Buffer (QsnRtvFldDtaLen) API determines
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the number of bytes of field data returned after a Read Input Fields
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(QsnReadInp) or Read Immediate (QsnReadImm) input operation. You can use the
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Retrieve Pointer to Field Data (QsnRtvFldDta) API to retrieve a pointer to this
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data so that you can parse the field values. Refer to the Read Input Fields
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(QsnReadInp) API for a description of the format of the data returned.</p>
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<p>To query the results from a Read Modified Fields (QsnReadMDT), Read Modified
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Alternate (QsnReadMDTAlt), or Read Modified Immediate Alternate
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(QsnReadMDTImmAlt) operation, use the Retrieve Number of Fields Read
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(QsnRtvFldCnt) and Retrieve Field Information (QsnRtvFldInf) APIs. To query the
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result from any other input operation, use the Retrieve Length of Data in Input
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Buffer (QsnRtvDtaLen) and Retrieve Pointer to Data in Input Buffer (QsnRtvDta)
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APIs.</p>
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<br>
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<h3>Authorities and Locks</h3>
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<p>None</p>
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<br>
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<h3>Required Parameter</h3>
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<dl>
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<dt><strong>Input buffer handle</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>A handle for the input buffer that contains the results of the input
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operation. The input buffer must be filled as a result of a QsnReadInp or
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QsnReadImm operation.</p>
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</dd>
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</dl>
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<br>
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<h3>Omissible Parameter Group</h3>
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<dl>
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<dt><strong>Length of field data</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>The variable that contains the field data length when the QsnRtvFldDtaLen
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API has completed. The field data length is 3 bytes less than the value
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returned by the QsnRtvDtaLen API. (The cursor and AID-key values account for
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the first 3 bytes of the input data returned).</p>
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</dd>
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<dt><strong>Error code</strong></dt>
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<dd>I/O; CHAR(*)
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<p>The structure in which to return error information. For the format of the
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structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>. If this
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parameter is omitted, diagnostic and escape messages are issued to the
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application.</p>
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</dd>
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</dl>
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<br>
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<h3>Returned Value</h3>
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<dl>
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<dt><strong>Length of field data</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>This API returns the value for the length of field data parameter, or -1
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otherwise.</p>
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</dd>
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</dl>
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<br>
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<h3>Error Messages</h3>
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<table width="100%" cellpadding="3">
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<!-- cols="15 85" -->
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<tr>
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<th align="left" valign="top">Message ID</th>
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<th align="left" valign="top">Error Message Text</th>
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</tr>
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<tr>
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<td align="left" valign="top">CPF24B4 E</td>
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<td valign="top">Severe error while addressing parameter list.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF1 E</td>
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<td valign="top">Error code parameter not valid.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPF3CF2 E</td>
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<td valign="top">Error(s) occurred during running of &1 API.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA319 E</td>
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<td valign="top">No data in input buffer.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA31E E</td>
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<td valign="top">Required parameter &1 omitted.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA32E E</td>
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<td valign="top">Input data for query operation incorrect.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA32F E</td>
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<td valign="top">Buffer type incorrect.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA331 E</td>
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<td valign="top">Buffer handle incorrect.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA334 E</td>
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<td valign="top">Low level environment handle incorrect.</td>
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</tr>
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</table>
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<br>
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<hr>
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API introduced: V2R3
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<hr>
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<center>
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<table cellpadding="2" cellspacing="2">
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<tr align="center">
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<td valign="middle" align="center"><a href="#Top_Of_Page">Top</a> | <a href=
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"dsm.htm">Dynamic Screen Manager APIs</a> | <a href="aplist.htm">APIs by
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category</a></td>
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</tr>
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</table>
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</center>
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</body>
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</html>
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