ibm-information-center/dist/eclipse/plugins/i5OS.ic.apis_5.4.0.1/QsnRtvReadInf.htm

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<title>Retrieve Read Information (QsnRtvReadInf) API</title>
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<h2>Retrieve Read Information (QsnRtvReadInf) API</h2>
<div class="box" style="width: 70%;">
<br>
&nbsp;&nbsp;Required Parameter Group:<br>
<!-- iddvc RMBR -->
<br>
<table width="100%">
<tr>
<td align="center" valign="top" width="10%">1</td>
<td align="left" valign="top" width="50%">Input buffer handle</td>
<td align="left" valign="top" width="20%">Input</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
<tr>
<td align="center" valign="top">2</td>
<td align="left" valign="top">Query result</td>
<td align="left" valign="top">Output</td>
<td align="left" valign="top">Char(*)</td>
</tr>
<tr>
<td align="center" valign="top">3</td>
<td align="left" valign="top">Length of query result</td>
<td align="left" valign="top">Input</td>
<td align="left" valign="top">Binary(4)</td>
</tr>
</table>
<br>
&nbsp;&nbsp;Omissible Parameter Group:<br>
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<br>
<table width="100%">
<tr>
<td align="center" valign="top" width="10%">4</td>
<td align="left" valign="top" width="50%">Low-level environment handle</td>
<td align="left" valign="top" width="20%">Input</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
<tr>
<td align="center" valign="top">5</td>
<td align="left" valign="top">Error code</td>
<td align="left" valign="top">I/O</td>
<td align="left" valign="top">Char(*)</td>
</tr>
</table>
<br>
&nbsp;&nbsp;Returned Value:<br>
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<br>
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<tr>
<td align="center" valign="top" width="10%"></td>
<td align="left" valign="top" width="50%">Return code</td>
<td align="left" valign="top" width="20%">Output</td>
<td align="left" valign="top" width="20%">Binary(4)</td>
</tr>
</table>
<br>
&nbsp;&nbsp;Default Public Authority: *USE<br>
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<br>
&nbsp;&nbsp;Service Program: QSNAPI<br>
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<br>
&nbsp;&nbsp;Threadsafe: No<br>
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<br>
</div>
<p>The Retrieve Read Information (QsnRtvReadInf) API returns information about
the input operation that filled the given input buffer.</p>
<br>
<h3>Authorities and Locks</h3>
<p>None</p>
<br>
<h3>Required Parameter Group</h3>
<dl>
<dt><strong>Input buffer handle</strong></dt>
<dd>INPUT; BINARY(4)
<p>A handle for the input buffer that contains the results of the input
operation.</p>
</dd>
<dt><strong>Query result</strong></dt>
<dd>OUTPUT; CHAR(*)
<p>The structure that contains the result of the query when the QsnRtvReadInf
API has completed. The format of this structure is shown in <a href=
"#HDRQRYFMT">Format of the Query Result</a>.</p>
</dd>
<dt><strong>Length of query result</strong></dt>
<dd>INPUT; BINARY(4)
<p>The length of the query result parameter. The minimum value must be 8.</p>
</dd>
</dl>
<br>
<h3>Omissible Parameter Group</h3>
<dl>
<dt><strong>Low-level environment handle</strong></dt>
<dd>INPUT; BINARY(4)
<p>The low-level environment that the operation applies to. If this parameter
is omitted or given with a value of zero, the default low-level environment is
used.</p>
</dd>
<dt><strong>Error code</strong></dt>
<dd>I/O; CHAR(*)
<p>The structure in which to return error information. For the format of the
structure, see <a href="../apiref/error.htm#hdrerrcod">Error Code Parameter</a>. If this
parameter is omitted, diagnostic and escape messages are issued to the
application.</p>
</dd>
</dl>
<br>
<h3>Returned Value</h3>
<dl>
<dt><strong>Return code</strong></dt>
<dd>OUTPUT; BINARY(4)
<p>A return code indicating the result of the operation. The value returned
will be 0 if the operation was successful, or -1 otherwise.</p>
</dd>
</dl>
<br>
<h3><a name="HDRQRYFMT">Format of the Query Result</a></h3>
<table border width="80%">
<tr>
<th align="center" valign="bottom" colspan="2">Offset</th>
<th align="left" valign="bottom" rowspan="2">Type</th>
<th align="left" valign="bottom" rowspan="2">Field</th>
</tr>
<tr>
<th align="center" valign="bottom">Dec</th>
<th align="center" valign="bottom">Hex</th>
</tr>
<tr>
<td align="center" valign="top" width="10%">0</td>
<td align="center" valign="top" width="10%">0</td>
<td align="left" valign="top" width="20%">BINARY(4)</td>
<td align="left" valign="top" width="60%">Bytes returned</td>
</tr>
<tr>
<td align="center" valign="top">4</td>
<td align="center" valign="top">4</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Bytes available</td>
</tr>
<tr>
<td align="center" valign="top">8</td>
<td align="center" valign="top">8</td>
<td align="left" valign="top">CHAR(8)</td>
<td align="left" valign="top">Reserved</td>
</tr>
<tr>
<td align="center" valign="top">16</td>
<td align="center" valign="top">10</td>
<td align="left" valign="top">PTR(SPP)</td>
<td align="left" valign="top">Pointer to first byte of data</td>
</tr>
<tr>
<td align="center" valign="top">32</td>
<td align="center" valign="top">20</td>
<td align="left" valign="top">PTR(SPP)</td>
<td align="left" valign="top">Pointer to first byte of field data</td>
</tr>
<tr>
<td align="center" valign="top">48</td>
<td align="center" valign="top">30</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Number of bytes of input data</td>
</tr>
<tr>
<td align="center" valign="top">52</td>
<td align="center" valign="top">34</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Number of bytes of field data</td>
</tr>
<tr>
<td align="center" valign="top">56</td>
<td align="center" valign="top">38</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Number of fields in input buffer</td>
</tr>
<tr>
<td align="center" valign="top">60</td>
<td align="center" valign="top">3C</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Number of bytes of data received</td>
</tr>
<tr>
<td align="center" valign="top">64</td>
<td align="center" valign="top">40</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Row location of cursor</td>
</tr>
<tr>
<td align="center" valign="top">68</td>
<td align="center" valign="top">44</td>
<td align="left" valign="top">BINARY(4)</td>
<td align="left" valign="top">Column location of cursor</td>
</tr>
<tr>
<td align="center" valign="top">72</td>
<td align="center" valign="top">48</td>
<td align="left" valign="top">CHAR(1)</td>
<td align="left" valign="top">AID code for AID-associated read request</td>
</tr>
<tr>
<td align="center" valign="top">73</td>
<td align="center" valign="top">49</td>
<td align="left" valign="top">CHAR(7)</td>
<td align="left" valign="top">Reserved</td>
</tr>
</table>
<br>
<br>
<h3>Field Descriptions</h3>
<p><strong>Bytes available.</strong> The number of bytes of data available to
be returned. All available data is returned if enough space is provided.</p>
<p><strong>Bytes returned.</strong> The number of bytes of data returned.</p>
<p><strong>AID code for AID-associated read request.</strong> AID code
corresponding to key pressed to service an AID-associated read request. The
input buffer must be filled as a result of a QsnReadInp, QsnReadMDT, or
QsnReadMDTAlt operation. If the input buffer is filled as a result of any other
input operation, this field is set to X'00'. See <a href="dsm1e.htm#HDRAID">
AID-Generating Keys</a> for a description of the possible values.</p>
<p><strong>Column location of cursor.</strong> Column location of cursor when
the input operation was serviced. The input buffer must be filled as a result
of a QsnReadInp, QsnReadMDT, QsnReadMDTAlt, QsnReadImm, or QsnReadMDTImmAlt
operation. If the input buffer is filled as a result of any other input
operation, this field is set to -1.</p>
<p><strong>Number of bytes of data sent.</strong> Number of bytes of data sent
from screen. If this value is larger than the number of bytes of input data,
then truncation occurs on the input operation.</p>
<p><strong>Number of bytes of field data.</strong> Number of bytes of field
data in input buffer. This does not include the 3 bytes of header information
(the cursor row and column, and the AID byte). The input buffer must be filled
as a result of a QsnReadInp, QsnReadMDT, QsnReadMDTAlt, QsnReadImm, or
QsnReadMDTImmAlt operation. If the input buffer is filled as a result of any
other input operation, this field is set to -1.</p>
<p><strong>Number of bytes of input data.</strong> Number of bytes of input
data in input buffer. This includes header information such as row and column
position.</p>
<p><strong>Number of fields in input buffer.</strong> Number of fields in input
buffer. This does not include header information such as row and column
position. The input buffer must be filled as a result of a QsnReadMDT,
QsnReadMDTAlt, or QsnReadMDTImmAlt operation. If the input buffer is filled as
a result of any other input operation, or the input data format cannot be
determined, this field is set to -1.</p>
<p><strong>Pointer to first byte of data.</strong> Pointer to first byte of
data in input buffer. This includes header information such as row and column
position.</p>
<p><strong>Pointer to first byte of field data.</strong> Pointer to first byte
of field data in input buffer. This will be the first byte of data following
the header information (the cursor row and column, and the AID byte). If the
buffer does not contain field data, this field is set to the null pointer.</p>
<p><strong>Reserved.</strong> An ignored field.</p>
<p><strong>Row location of cursor.</strong> Row location of cursor when the
input operation was serviced. The input buffer must be filled as a result of a
QsnReadInp, QsnReadMDT, QsnReadMDTAlt, QsnReadImm, or QsnReadMDTImmAlt
operation. If the input buffer is filled as a result of any other input
operation, this field is set to -1.</p>
<br>
<h3>Error Messages</h3>
<table width="100%" cellpadding="3">
<!-- cols="15 85" -->
<tr>
<th align="left" valign="top">Message ID</th>
<th align="left" valign="top">Error Message Text</th>
</tr>
<tr>
<td align="left" valign="top">CPF24B4 E</td>
<td valign="top">Severe error while addressing parameter list.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3C1F E</td>
<td valign="top">Pointer is not on a 16 byte boundary.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3C24 E</td>
<td valign="top">Length of the receiver variable is not valid.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3CF1 E</td>
<td valign="top">Error code parameter not valid.</td>
</tr>
<tr>
<td align="left" valign="top">CPF3CF2 E</td>
<td valign="top">Error(s) occurred during running of &amp;1 API.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA319 E</td>
<td valign="top">No data in input buffer.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA31E E</td>
<td valign="top">Required parameter &amp;1 omitted.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA320 E</td>
<td valign="top">Pointer parameter is null.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA32F E</td>
<td valign="top">Buffer type incorrect.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA331 E</td>
<td valign="top">Buffer handle incorrect.</td>
</tr>
<tr>
<td align="left" valign="top">CPFA334 E</td>
<td valign="top">Low level environment handle incorrect.</td>
</tr>
</table>
<br>
<hr>
API introduced: V2R3
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