vectorbuffer.cpp
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/*
vectorbuffer.cpp
yet another circle buffer
Markus Mertama
*/
#include"vectorbuffer.h"
void VectorPanic(TInt aErr, TInt aLine)
{
TBuf<64> b;
b.Format(_L("vector buffer at % d "), aLine);
User::Panic(b, aErr);
}
void TNodeBuffer::TNode::Terminator(TNodeBuffer::TNode* aNode)
{
Mem::Copy(iSucc, &aNode, sizeof(TNode*));
}
TInt TNodeBuffer::TNode::Size() const
{
return reinterpret_cast<const TUint8*>(iSucc) - Ptr();
}
const TUint8* TNodeBuffer::TNode::Ptr() const
{
return reinterpret_cast<const TUint8*>(this) + sizeof(TNode);
}
TNodeBuffer::TNode* TNodeBuffer::TNode::Empty(TUint8* aBuffer)
{
TNode* node = reinterpret_cast<TNode*>(aBuffer);
node->iSucc = node + 1;
return node;
}
TNodeBuffer::TNode* TNodeBuffer::TNode::New(TNode* aPred, const TDesC8& aData)
{
TNode* node = aPred->Size() == 0 ? aPred : aPred->iSucc;
TUint8* start = reinterpret_cast<TUint8*>(node) + sizeof(TNode);
node->iSucc = reinterpret_cast<TNode*>(start + aData.Size());
node->iSucc->iSucc = NULL; //terminator
__ASSERT_DEBUG(node->Size() == aData.Size(), VECPANIC(KErrCorrupt));
Mem::Copy(start, aData.Ptr(), aData.Size());
return node;
}