/*

    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;

    }