Symbian3/PDK/Source/GUID-0D619063-F2DB-53FC-A5E6-BC09AD915FA4.dita
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Fri, 22 Jan 2010 18:26:19 +0000
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Addition of the PDK content and example code for Documentation_content according to Feature bug 1607 and bug 1608
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<?xml version="1.0" encoding="utf-8"?>
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<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
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<!-- This component and the accompanying materials are made available under the terms of the License 
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"Eclipse Public License v1.0" which accompanies this distribution, 
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and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
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<!-- Initial Contributors:
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    Nokia Corporation - initial contribution.
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Contributors: 
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-->
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<!DOCTYPE concept
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  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
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<concept id="GUID-0D619063-F2DB-53FC-A5E6-BC09AD915FA4" xml:lang="en"><title>Resource
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member initialisation overview</title><prolog><metadata><keywords/></metadata></prolog><conbody>
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<p>The resource initialiser has different forms depending on whether a single,
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simple, member is being initialised, or whether a struct or an array is being
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initialised:</p>
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<codeblock xml:space="preserve">&lt;resource-initialiser&gt;
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<b>resource-initialiser ::</b>=
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	&lt;member-name&gt; [ (&lt;length-limit&gt;) ] = &lt;initialiser&gt;&lt;initialiser&gt;
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<b>initialiser :</b>:=
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	&lt;simple-initialiser&gt; | &lt;struct-initialiser&gt; | &lt;array-initialiser&gt;</codeblock>
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<p>Resource members may be initialised by default (in the struct definition)
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or explicitly initialised (in the resource definition).</p>
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<p>In general,</p>
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<ul>
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<li id="GUID-E712BF25-9F6A-5E9E-8F85-7ACBF010F7C1"><p>If a member is initialised
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in a <codeph>RESOURCE</codeph> statement, then that is its value.</p> </li>
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<li id="GUID-FF416E99-A21F-5525-B01C-BEA51B216E25"><p>If a member is initialised
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in a <codeph>STRUCT</codeph> statement, then that is its value for all resources
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which do not explicitly initialise it.</p> </li>
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<li id="GUID-CA918017-F0C1-5E1F-8D8A-893653C2D94E"><p>If a member is <i>neither</i> initialised
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in a <codeph>RESOURCE</codeph> statement <i>nor</i> a <codeph>STRUCT</codeph> statement,
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then: <codeph>BYTE</codeph>, <codeph>WORD</codeph> and <codeph>DOUBLE</codeph> members
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contain zero; <codeph>TEXT</codeph>, <codeph>LTEXT</codeph> and <codeph>BUF</codeph> members
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contain an empty string.</p> </li>
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<li id="GUID-590BD79C-AB1B-537C-9A23-3F0902539B3A"><p>It is an error for <codeph>LINK</codeph> and <codeph>LLINK</codeph> members
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to have no explicit value, so they must be initialised, either by default
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(in the <codeph>STRUCT</codeph> statement) or explicitly (in the <codeph>RESOURCE</codeph> statement).</p> </li>
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<li id="GUID-F0C0C9CB-625B-5307-81EF-F78AC284CB0B"><p><codeph>SRLINK</codeph> members
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may not be initialised (either in the <codeph>STRUCT</codeph> statement or
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a <codeph>RESOURCE</codeph> statement) since they are automatically assigned
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the resource id of the resource in which they appear.</p> </li>
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<li id="GUID-23FBAA84-2826-5972-9D75-AEB2082A01D7"><p>Members which are themselves <codeph>STRUCT</codeph> s
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may not be default initialised. They can only be initialised in the <codeph>RESOURCE</codeph> definition.
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If they are not explicitly initialised, they will take up zero bytes in the
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resource file. For example, given the following <codeph>STRUCT</codeph> definition:</p> <codeblock id="GUID-82D529DD-EF78-56B6-96CC-D245C0C5C046" xml:space="preserve">STRUCT TEST2 
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 {
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 WORD    value;
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 STRUCT  tester;
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 }</codeblock> <p>The following <codeph>RESOURCE</codeph> statement only generates
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the two bytes <codeph>0xFF 0x00</codeph>.</p> <codeblock id="GUID-B97A619C-8299-5FC9-AD49-658F21568E2F" xml:space="preserve">RESOURCE TEST2 item
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 {
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 value=255;
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 }</codeblock> </li>
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</ul>
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</conbody></concept>