How to use the MDesCArray mixin class

The code fragments below show how the MDesCArray mixin is used to:

• return the number of descriptor elements in a descriptor array.

• return a TPtrC representing a specific indexed descriptor element.

The code uses the build independent forms but the code is equally valid when using the explicit 8 bit or16 bit variants.

In this case a CDesCArrayFlat, a CDesCArraySeg and a CPtrCArray, can all be handled by the single function foo().

...
 CDesCArrayFlat* descflat = new (ELeave) CDesCArrayFlat(4);
 CDesCArraySeg* descseg = new (ELeave) CDesCArraySeg(4);
 CPtrCArray* ptrc = new (ELeave) CPtrCArray(4);
 ...
 ... // add descriptor elements to all three arrays
 ...
 foo(descflat);
 foo(descseg);
 foo(ptrc);
 ...

void foo(MDesCArray* anArray)
 {
 ..
 TInt somenumber = anArray->MdcaCount();
 TPtrC someptrc = anArray->MdcaPoint(someindexvalue);
 ..
 }