/////////////////////////////////////////////////////////////////////////
///  BridgeToCPPengine.cpp - Shows how to use traditional, unmanaged  ///
///  ver 1.0                 C++ packaged as a dll library from       ///
///                          managed code.                            ///
///                                                                   ///
///  Language:     Visual C++, ver 7.0, Visual Studio.Net             ///
///  Platform:     Dell Dimension 8100, Windows Pro 2000              ///
///  Application:  CSE681 Example                                     ///
///  Author:       Jim Fawcett, CST 2-187, Syracuse Univ.             ///
///                (315) 443-3948, jfawcett@twcny.rr.com              ///
/////////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "bridgeToCPPengine.h"
#include <fstream>
#include "Tok.h"
#include <string>

using namespace bridgeToCPPengine;
using namespace System;
using namespace std;

//----< delegate attaching toker to file to unmanaged class >----------

bool Bridge::attach(String* fileName)
{
  return pTokMgr->SetStream(fileName);
}

//----< delegate GetTok to unmanaged class TokMgr >--------------------

bool Bridge::GetTok(String*& pTok)
{
  return pTokMgr->GetTok(pTok);
}

//
//----< create toker attached to named file >--------------------------

bool TokMgr::SetStream(String* fileName)
{
  // convert .Net String to C++ string

  string temp;
  for(int i=0; i<fileName->Length; ++i)
  {
    wchar_t wch = fileName->get_Chars(i);
    char ch = static_cast<char>(wch);
    temp.append(1,ch);
  }
  // attempt to open file and create toker

  input.open(temp.c_str());
  if(!input.good())
    return false;
  _toker = new toker<codeDelimiter>(input);
  return true;
}

//----< use tokenizer to extract token from stream >-------------------

bool TokMgr::GetTok(String*& pTok)
{
  // get token in std::string object

  std::string* temp = new std::string("");
  bool ok = _toker->getTok(*temp);
 
  // convert C++ std::string to .Net String

  String* temper = new String(temp->c_str());
  pTok = temper;
  temper = 0;
  delete temp;
  return ok;
}