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

/*==LICENSE==*

CyanWorlds.com Engine - MMOG client, server and tools
Copyright (C) 2011  Cyan Worlds, Inc.

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.

You can contact Cyan Worlds, Inc. by email legal@cyan.com
 or by snail mail at:
      Cyan Worlds, Inc.
      14617 N Newport Hwy
      Mead, WA   99021

*==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();
}