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core/com.nokia.carbide.cpp.compiler.doc.user/html/pragmas_x86/p_pack.htm
author Deepak Modgil <Deepak.Modgil@Nokia.com>
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<title>pack</title>
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<link rel="StyleSheet" href="../../book.css" type="text/css"/>
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<h3>pack</h3>
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<p>  Controls the alignment of data structures.</p>
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<h5>Syntax</h5>
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  <p class="code">#pragma pack( [n | push, n | pop] )</p>
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  <h5>Targets</h5>
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  Intel x86, MIPS<br />
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  <h5>Remarks</h5>
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  <p>Sets the packing alignment for data structures. It affects all data structures declared after this pragma until you change it again with another pack pragma.</p>
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  <table width="100%"  border="0" cellpadding="2" cellspacing="0">
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    <tr>
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      <th width="28%" scope="col">This pragma&hellip;</th>
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      <th width="72%" scope="col">Does this&hellip;</th>
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    </tr>
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    <tr>
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      <td class="code">#pragma pack(n)</td>
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      <td>Sets the alignment modulus to n, where n can be 1, 2, 4, 8, or 16. For MIPS compilers, if n is 0, structure alignment is reset to the default setting.</td>
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    </tr>
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    <tr>
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      <td class="code">#pragma pack(push, n)</td>
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      <td>Pushes the current alignment modulus on a stack, then sets it to n, where n can be 1, 2, 4, 8, or 16. Use push and pop when you need a specific modulus for some declaration or set of declarations, but do not want to disturb the default setting. MIPS compilers do not support this form.</td>
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    </tr>
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    <tr>
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      <td class="code">#pragma pack(pop)</td>
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      <td>Pops a previously pushed alignment modulus from the stack. MIPS compilers do not support this form.</td>
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    </tr>
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    <tr>
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      <td class="code">#pragma pack()</td>
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      <td>For x86 compilers, resets alignment modulus to the value specified in the x86 CodeGen panel. For MIPS compilers, resets structure alignment to the default setting.</td>
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    </tr>
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  </table>
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  <p>This pragma corresponds to the Byte Alignment setting in the x86 CodeGen panel. <br />
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</p>
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  <div id="footer">Copyright &copy; 2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. <br>License: <a href="http://www.eclipse.org/legal/epl-v10.html">http://www.eclipse.org/legal/epl-v10.html</a></div>
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FCL/sftools/dev/ide/carbidecpp