conversion between char* and Descriptors

conversion between char* and Descriptors

char* pString === TPtrC8 buf(pString, User::StringLength(pString));
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TInt len = ptrc.Length();

Mem::Copy(pString, ptrc.Ptr(), len);
pString[len] = 0;
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and Ptr() function is:
const TUint8* Ptr() const