248 lines
7.1 KiB
HTML
248 lines
7.1 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>Create Command Buffer (QsnCrtCmdBuf) API</title>
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<!-- Begin Header Records ========================================== -->
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<!-- DSMMST1 SCRIPT A converted by B2H R4.1 (346) (CMS) by V2KEA304 -->
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<!-- at RCHVMW2 on 29 Jan 1999 at 16:05:09 -->
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<!-- Change History: -->
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<!-- YYMMDD USERID Change description -->
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<!--File Edited October 2001 -->
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<!--End 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>Create Command Buffer (QsnCrtCmdBuf) API</h2>
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<div class="box" style="width: 70%;">
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<br>
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Required Parameter:<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%">Initial command buffer size</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%">Increment amount</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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<tr>
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<td align="center" valign="top">3</td>
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<td align="left" valign="top">Maximum size</td>
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<td align="left" valign="top">Input</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">4</td>
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<td align="left" valign="top">Command buffer handle</td>
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<td align="left" valign="top">Output</td>
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<td align="left" valign="top">Binary(4)</td>
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</tr>
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<tr>
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<td align="center" valign="top">5</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="right" valign="top" width="10%"></td>
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<td align="left" valign="top" width="50%">Command buffer handle</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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<!-- iddvc RMBR -->
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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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<!-- iddvc RMBR -->
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<br>
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</div>
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<p>The Create Command Buffer (QsnCrtCmdBuf) API creates a command buffer for
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use with low-level operations that accept a command buffer parameter.</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>Initial command buffer size</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The initial size of the command buffer, in bytes, to create. This parameter
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must be greater than 0 and less than the size of the underlying display file
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I/O buffer: approximately 4500 bytes for 24x80, 6300 bytes for 27x132, 8000
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bytes for DBCS-capable displays, 8800 bytes for DBCS presentation
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screen-capable displays, and 16000 bytes for DBCS ideographic-capable
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displays.</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>Increment amount</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The amount to increment the command buffer size by if there is not enough
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space to store a specified command. If this parameter is omitted or specified
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with a zero value, the buffer size will not be incremented and a CPFA301 error
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will be issued when there is no space in the buffer to store a requested
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command. If an attempt is made to increment a command buffer to a size that
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exceeds the available memory resources or the size of the underlying display
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file I/O buffer, the increment will not take place and a CPFA301 error will be
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issued for that operation.</p>
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</dd>
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<dt><strong>Maximum size</strong></dt>
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<dd>INPUT; BINARY(4)
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<p>The maximum size to increment the command buffer to when there is not enough
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space to store a specified command. If this parameter is nonzero, it must be
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greater than the initial command buffer size parameter, and less than the size
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of the underlying display file I/O buffer. If this parameter is omitted or
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specified with a zero value, no maximum value is assigned for the command
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buffer. If the buffer is to be incremented, it will be incremented until either
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there is no additional storage available or the command buffer exceeds the size
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of the display file I/O buffer. If the increment amount parameter is omitted or
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specified with a zero value, this parameter is ignored and the maximum size is
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the same as the initial command buffer size.</p>
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</dd>
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<dt><strong>Command buffer handle</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>The variable containing the handle for the command buffer created after the
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QsnCrtCmdBuf API has completed. The buffer state will be the same as that
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following a QsnClrBuf operation.</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>Command buffer handle</strong></dt>
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<dd>OUTPUT; BINARY(4)
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<p>This API returns the value for the command buffer handle parameter if
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successful, or -1 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">CPFA312 E</td>
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<td valign="top">Buffer size parameter error.</td>
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</tr>
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<tr>
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<td align="left" valign="top">CPFA314 E</td>
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<td valign="top">Memory allocation error.</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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