author | Dominic Pinkman <dominic.pinkman@nokia.com> |
Tue, 20 Jul 2010 12:00:49 +0100 | |
changeset 13 | 48780e181b38 |
parent 0 | 89d6a7a84779 |
permissions | -rw-r--r-- |
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89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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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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Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
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Contributors: |
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Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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--> |
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Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
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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-A7D95E53-67DA-54C7-B093-995CA9CC39B5" xml:lang="en"><title>How to |
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represent general binary data</title><shortdesc>Construct an 8 bit variant descriptor to represent general binary |
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data.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody> |
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<p>The kind of data represented or contained by descriptors is not restricted |
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to text. Descriptors can also handle general binary data.</p> |
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<p>Binary data should always be treated as 8 bit data regardless of the build.</p> |
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<p>For example, starting with an area in memory initialised with binary data |
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as follows:</p> |
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<codeblock id="GUID-2541B451-E008-5AD7-A8F7-4A19B76AB2A2" xml:space="preserve">TUint8 data[6] = {0x00,0x01,0x02,0xAD,0xAE,0xAF};</codeblock> |
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<p>construct a modifiable buffer descriptor using the default constructor |
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Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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as follows:</p> |
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<codeblock id="GUID-DDAF1F08-29EC-572F-83B0-0A4437EF1DB9" xml:space="preserve">TBuf8<32> buffer;</codeblock> |
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Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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<p>The following code fragment puts the binary data into the descriptor and |
89d6a7a84779
Initial contribution of Documentation_content according to Feature bug 1266 bug 1268 bug 1269 bug 1270 bug 1372 bug 1374 bug 1375 bug 1379 bug 1380 bug 1381 bug 1382 bug 1383 bug 1385
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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appends a number of single byte values. The length of the buffer is 9, the |
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Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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maximum length is 32 and the size is 9 regardless of the build.</p> |
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<codeblock id="GUID-B9AB3D57-1EFB-5A10-882E-E29301FF8759" xml:space="preserve">TInt index; |
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TInt counter;</codeblock> |
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<p>Text and general binary data can be freely mixed and the following code |
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is acceptable:</p> |
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Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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<codeblock id="GUID-2D7B1A85-82F6-5B67-8A49-5E79745602A3" xml:space="preserve">buffer.Append('A'); |
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buffer.Append('B'); |
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buffer.Append(0x11);</codeblock> |
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<p>Note that fixed length C++ arrays such as <codeph>data</codeph> above can |
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be packaged inside a thin wrapper class, a <codeph>TFixedArray<class T,TInt |
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S></codeph> type, to guarantee that all array accesses are safe.</p> |
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<section id="GUID-A0922DAD-0D96-4758-8ABA-4C33DC6FE01B"><title>See also</title> <p><xref href="GUID-E41C4E77-C48B-548E-A2F5-14FA5CC68982.dita">Using |
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wrappers</xref> </p> </section> |
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</conbody></concept> |