CWE-ou-minkata/Sources/Plasma/NucleusLib/pnNetCli/pnNcUtils.cpp

/*==LICENSE==*

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Copyright (C) 2011 Cyan Worlds, Inc.

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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnNetCli/pnNcUtils.cpp
*   
***/

#include "Pch.h"
#pragma hdrstop


/*****************************************************************************
*
*   CInputAccumulator
*
***/

//============================================================================
CInputAccumulator::CInputAccumulator () {
    buffer.Reserve(1);
    curr = buffer.Ptr();
}

//============================================================================
void CInputAccumulator::Add (unsigned count, const byte * data) {
//	LogMsg(kLogPerf, L"Adding %u bytes to accumulator %p", count, this);
    unsigned offset =  curr - buffer.Ptr();
    buffer.Add(data, count);
    curr = buffer.Ptr() + offset;
}

//============================================================================
bool CInputAccumulator::Get (unsigned count, void * dest) {
    if (curr + count > buffer.Term())
        return false;
//	LogMsg(kLogPerf, L"Removing %u bytes from accumulator %p", count, this);
    MemCopy(dest, curr, count);
    curr += count;
    return true;
}

//============================================================================
bool CInputAccumulator::Eof () const {
    return curr >= buffer.Ptr() + buffer.Count();
}

//============================================================================
void CInputAccumulator::Clear () {
    buffer.SetCount(0);
    curr = buffer.Ptr();
}

//============================================================================
void CInputAccumulator::Compact () {
    unsigned diff = curr - buffer.Ptr();
    unsigned newCount = buffer.Count() - diff;
    buffer.Move(0, diff, newCount);
    buffer.SetCount(newCount);
    curr = buffer.Ptr();
}