TnbCacheReader.h

[詳解]

#pragma once
#include "TnbReader.h"
#include "TnbQueue.h"
 
 
 
//TNB Library
namespace TNB
{
 
 
 
class CCacheReader : public IReader, CCopyImpposible
{
public:
 
    CCacheReader(void) : m_pReader(NULL), m_minimum(100)
    {
    }
 
    void SetEnvironmrent(IReport* pRep, size_t minimum = 100)
    {
        m_pReader = pRep;
        m_minimum = minimum;
    }
 
    virtual LPCTSTR GetOpenName(void) const
    {
        return (m_pReader != NULL) ? m_pReport->GetOpenName() : _T("");
    }
 
    virtual void Close(void)
    {
        if ( m_pReader != NULL )
        {
            m_pReader->Close();
        }
    }
 
    virtual bool CanRead(void) const
    {
        return (m_pReader != NULL) ? m_pReport->CanRead() : false;
    }
 
    virtual LONGLONG GetSize(void) const
    {
        return (m_pReader != NULL) ? m_pReport->GetSize() : 0;
    }
 
    virtual LONGLONG Seek(LONGLONG llOffset, ESeekMode eSeek = TOP) const
    {
        return (m_pReader != NULL) ? m_pReport->Seek(llOffset, eSeek) : -1;
    }
 
    virtual size_t Read(size_t size, LPVOID _P) const
    {
        return 0;
    }
 
    const IConstCollectionT<BYTE>& Peek(size_t size = 0, LONGLONG offset = 0) const
    {
    }
 
 
 
 
 
private:
    size_t                          m_minimum;  
    IReader*                        m_pReader;  
    LONGLONG                        m_pointer;  
    mutable CVectorT<BYTE>          m_buffer;   
};