/////////////////////////////////////////////////////////////////
//  PersistFileImpl.cpp -  Implements IPersistFile             //
//                                                             //
//  Platform:     Dell Dimension 8100, Windows 2000, SP2       //
//  Application:  Demonstration of ATL 7.0 for CSE775          //
//  Modified:     Jim Fawcett, Syracuse Univ, CST 2-187        //
//                (315) 443-3948, fawcett@ecs.syr.edu          //
/////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include <iostream>
#include "IPersistFileImpl.h"

STDMETHODIMP ReadStream(IStorage* pIStorage, OLECHAR* pStreamName, CString& streamBuffer)
{
  LPSTREAM pStream = NULL;
  HRESULT hr = pIStorage->OpenStream
                          (
                            pStreamName, 
                            NULL, 
                            STGM_DIRECT | STGM_READWRITE | STGM_SHARE_EXCLUSIVE, 
                            0, 
                            &pStream
                          );
  if(SUCCEEDED(hr))
  {
    std::cout << "\n  storage opened";
    const int BUFSIZE = 256;
    char Buffer[BUFSIZE];
    ULONG Count;

    hr = pStream->Read((void*)Buffer,BUFSIZE,&Count);

    if(SUCCEEDED(hr))
    {
      std::cout << "\n  stream read: ";
      *(Buffer + Count) = '\0';
      std::cout << Buffer;
      streamBuffer = Buffer;
    }
    else
      std::cout << "\n  read failed";
    pStream->Release();
  }
  else
    std::cout << "\n  storage open failed";
  return hr;
}