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37 is selected at build time. </p> <p>An explicit 8 bit variant is chosen for |
37 is selected at build time. </p> <p>An explicit 8 bit variant is chosen for |
38 binary data. The explicit 16 bit variant is rarely used. </p> <p>The base |
38 binary data. The explicit 16 bit variant is rarely used. </p> <p>The base |
39 class, <codeph>TDesC</codeph>, contains a data member which holds the length |
39 class, <codeph>TDesC</codeph>, contains a data member which holds the length |
40 of the data. The following drawing shows the layout of a <codeph>TPtrC</codeph> object |
40 of the data. The following drawing shows the layout of a <codeph>TPtrC</codeph> object |
41 for a string of five characters representing the English word "Hello". </p> <fig id="GUID-D3F0600A-D575-5309-8182-CFA98D184E29"> |
41 for a string of five characters representing the English word "Hello". </p> <fig id="GUID-D3F0600A-D575-5309-8182-CFA98D184E29"> |
42 <image href="GUID-37D2EFAE-FB55-5015-90CE-1361144C411E_d0e224612_href.png" placement="inline"/> |
42 <image href="GUID-37D2EFAE-FB55-5015-90CE-1361144C411E_d0e220875_href.png" placement="inline"/> |
43 <p>Non-modifiable pointer descriptor</p> |
43 <p>Non-modifiable pointer descriptor</p> |
44 </fig> </section> |
44 </fig> </section> |
45 <section id="GUID-33072A44-C95A-4688-AB85-019EFDC4F1B2"><title>Modifiable pointer descriptor</title> <p>The data represented |
45 <section id="GUID-33072A44-C95A-4688-AB85-019EFDC4F1B2"><title>Modifiable pointer descriptor</title> <p>The data represented |
46 by a modifiable pointer descriptor can be both accessed and changed through |
46 by a modifiable pointer descriptor can be both accessed and changed through |
47 this descriptor. </p> <p>The length of the data can vary between zero and |
47 this descriptor. </p> <p>The length of the data can vary between zero and |
62 of the data. The base class <codeph>TDes</codeph>, contains a data member |
62 of the data. The base class <codeph>TDes</codeph>, contains a data member |
63 that holds the maximum length of the data. The following drawing shows the |
63 that holds the maximum length of the data. The following drawing shows the |
64 layout of a <codeph>TPtr</codeph> object for a string of five characters representing |
64 layout of a <codeph>TPtr</codeph> object for a string of five characters representing |
65 the English word "Hello". The maximum length to be represented by the descriptor |
65 the English word "Hello". The maximum length to be represented by the descriptor |
66 is 12. </p> <fig id="GUID-B6213E7F-AE00-5854-BBB7-C82BE71CB495"> |
66 is 12. </p> <fig id="GUID-B6213E7F-AE00-5854-BBB7-C82BE71CB495"> |
67 <image href="GUID-8983A095-3F5A-5262-8920-8A13ADD045DC_d0e224677_href.png" placement="inline"/> |
67 <image href="GUID-8983A095-3F5A-5262-8920-8A13ADD045DC_d0e220940_href.png" placement="inline"/> |
68 <p>Modifiable pointer descriptor</p> |
68 <p>Modifiable pointer descriptor</p> |
69 </fig> </section> |
69 </fig> </section> |
70 </conbody></concept> |
70 </conbody></concept> |