/*=========================================================================
                                                                                
  Program:   bbtk
  Module:    $RCSfile: bbtkInterpreter.cxx,v $ $
  Language:  C++
  Date:      $Date: 2008/04/25 07:33:17 $
  Version:   $Revision: 1.64 $
                                                                                
  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
  l'Image). All rights reserved. See Doc/License.txt or
  http://www.creatis.insa-lyon.fr/Public/bbtk/License.html for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.
                                                                                
=========================================================================*/
/**
 *  \file 
 *  \brief class Interpreter :
 */

#include "bbtkInterpreter.h"
#include "bbtkExecuter.h"
#include "bbtkTranscriptor.h"
#include "bbtkMessageManager.h"
#include "bbtkConfigurationFile.h"
#include "bbtkUtilities.h"
#include "bbtkWxBlackBox.h"
#include <sys/stat.h>
#include <algorithm>
#ifdef CMAKE_HAVE_TERMIOS_H
#include <termios.h>
#define BBTK_USE_TERMIOS_BASED_PROMPT
#endif

#include <string>

namespace bbtk
{

 //=======================================================================
  Interpreter::Pointer Interpreter::New(const std::string& cpp_file) 
  {
    bbtkDebugMessage("Kernel",9,"Interpreter::New()"<<std::endl);
    return MakePointer(new Interpreter(cpp_file));
  }
 //=======================================================================

 //=======================================================================
  Interpreter::Interpreter(const std::string& cpp_file) 
    :
    mUser(0),
    mCommandLine(false),
    mThrow(false)
  {

    bufferNb =0;  
    bbtk::MessageManager::RegisterMessageType("echo","Level>0 : Prints the output of the 'print' commands of the user.\n\tLevel>1 : Prints the command being interpreted",1);
    bbtk::MessageManager::RegisterMessageType("Interpreter","Messages of the interpreter",0);
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::Interpreter()" <<std::endl);
 
    if (cpp_file.size()!=0)
      {
	mVirtualExecuter = boost::static_pointer_cast<VirtualExec>(bbtk::Transcriptor::New(cpp_file));
      }
    else 
      {
	bbtk::Executer::Pointer exe = bbtk::Executer::New();
	mRealExecuter = exe;
	mVirtualExecuter = boost::static_pointer_cast<VirtualExec>(exe);
      }

    // Lock this pointer or will auto-destruct !!
    mVirtualExecuter->SetInterpreter(MakePointer(this,true));
    
    // For the time being, comment out previous line, and
    // uncomment next line to check Transcriptor

    //mVirtualExecuter = new bbtk::Transcriptor("GeneratedProgram.txt");

    // Builds the commands dict
    CommandInfoType info;
   
    info.keyword = "new";
    info.argmin = 2;
    info.argmax = 2;
    info.code = cNew;
    info.syntax = "new <type> <name>";
    info.help = "Creates a new black box of type <type> with name <name>";
    mCommandDict[info.keyword] = info;
    
    info.keyword = "delete";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cDelete;
    info.syntax = "delete <box>";
    info.help = "Deletes the black box of name <box>";
    mCommandDict[info.keyword] = info;

    info.keyword = "newgui";
    info.argmin = 2;
    info.argmax = 2;
    info.code = cNewGUI;
    info.syntax = "newgui <box> <name>";
    info.help = "Automatically creates a graphical user interface with name <name> for the black box <box> and connects it to the box inputs";
    mCommandDict[info.keyword] = info;

    info.keyword = "connect";
    info.argmin = 2;
    info.argmax = 2;
    info.code = cConnect;
    info.syntax = "connect <box1.output> <box2.input>";
    info.help = "Connects the ouput <output> of black box <box1> to the input <input> of black box <box2>";
    mCommandDict[info.keyword] = info;

    info.keyword = "print";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cPrint;
    info.syntax = "print <string>";
    info.help = "Prints the string. Substitutes any token of the form '$box.output$' by the string adaptation of the output of the box (requires the right adaptor). No carriage return is issued at the end, use '\\n' to add carriage returns. The level of 'echo' messages must be greater than 1 (see the command 'message').";
    mCommandDict[info.keyword] = info;

    info.keyword = "exec";
    info.argmin = 1;
    info.argmax = 2;
    info.code = cExec;
    info.syntax = "exec <box | 'freeze' | 'unfreeze' >";
    info.help = "Executes the black box of name <box> (and connected boxes if needed). If the special keyword 'freeze' is given then freezes any further execution command. 'unfreeze' reverts to normal execution mode.";
    mCommandDict[info.keyword] = info;

    info.keyword = "package";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cPackage;
    info.syntax = "package <name>";
    info.help = "Begins the definition of a package.";
    mCommandDict[info.keyword] = info;
    
    info.keyword = "endpackage";
    info.argmin = 0;
    info.argmax = 0;
    info.code = cEndPackage;
    info.syntax = "endpackage";
    info.help = "Ends the definition of a package.";
    mCommandDict[info.keyword] = info;

    info.keyword = "define";
    info.argmin = 1;
    info.argmax = 2;
    info.code = cDefine;
    info.syntax = "define <type> [<package>]";
    info.help = "Begins the definition of a new type of complex black box called <type>. If <package> if provided will create it in the given package.";
    mCommandDict[info.keyword] = info;
    
    info.keyword = "endefine";
    info.argmin = 0;
    info.argmax = 0;
    info.code = cEndDefine;
    info.syntax = "endefine";
    info.help = "Ends the definition of a new type of complex black box";
    mCommandDict[info.keyword] = info;

    info.keyword = "kind";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cKind;
    info.syntax = "kind <ADAPTOR|DEFAULT_ADAPTOR|WIDGET_ADAPTOR|DEFAULT_WIDGET_ADAPTOR>";
    info.help = "Sets the kind of the currently defined complex black box";
    mCommandDict[info.keyword] = info;

    info.keyword = "input";
    info.argmin = 3;
    info.argmax = 3;
    info.code = cInput;
    info.syntax = "input <name> <box.input> <help>";
    info.help = "Defines the input <name> of the current working black box as being an alias for the input <input> of the black box <box>. <help> defines the help string for the newly created input";
    mCommandDict[info.keyword] = info;

    info.keyword = "output";
    info.argmin = 3;
    info.argmax = 3;
    info.code = cOutput;
    info.syntax = "output <name> <box.output> <help>";
    info.help = "Defines the output <name> of the current working black box as being an alias for the output <output> of the black box <box>. <help> defines the help string for the newly created output";
    mCommandDict[info.keyword] = info;

    info.keyword = "set";
    info.argmin = 2;
    info.argmax = 2;
    info.code = cSet;
    info.syntax = "set <box.input> <value>";
    info.help = "Sets the value of the input <input> of the black box <box> to <value>. There must exist a string to the value type adaptor";
    mCommandDict[info.keyword] = info;
   
    info.keyword = "config";  // JPR
    info.argmin = 0;
    info.argmax = 0;
    info.code = cConfig;
    info.syntax = "config";
    info.help = "Prints the value of all configuration parameters";
    mCommandDict[info.keyword] = info;

    info.keyword = "index";  // LG
    info.argmin = 0;
    info.argmax = 2;
    info.code = cIndex;

    info.syntax = "index [<filename> ['Initials'(default)|'Packages'|'Categories'|'Adaptors']]";
    info.help = "Creates an html index of known boxes. If filename is provided then save it to the file 'filename'. The default index entries are the initial letters of the names of the boxes. If 'Packages' or 'Categories' is provided then the entries are either the packages names or the categories. If 'Adaptors' is provided then an alphabetical index of all adaptors is created.";
    mCommandDict[info.keyword] = info;

    info.keyword = "reset";  
    info.argmin = 0;
    info.argmax = 0;
    info.code = cReset;
    info.syntax = "reset";
    info.help = "Deletes all boxes and unloads all packages (bbi is reset to its start state)";
    mCommandDict[info.keyword] = info;

    info.keyword = "author";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cAuthor;
    info.syntax = "author <string>";
    info.help = "Adds the string <string> to the author information of the black box being defined";
    mCommandDict[info.keyword] = info;
    
    info.keyword = "category"; //JP
    info.argmin = 1;
    info.argmax = 1;
    info.code = cCategory;
    info.syntax = "category <list of items, separated by ;>";
    info.help = "Adds the string <string> to the category information of the black box being defined";
    mCommandDict[info.keyword] = info;

    info.keyword = "description";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cDescription;
    info.syntax = "description <string>";
    info.help = "Adds the string <string> to the descriptive information of the black box being defined";
    mCommandDict[info.keyword] = info;

    info.keyword = "help";
    info.argmin = 0;
    info.argmax = 2;
    info.code = cHelp;
    info.syntax = "help";
    info.syntax = "\n         (1) help \n         (2) help <command name> \n         (3) help packages [all]\n         (4) help <package name> [all]\n         (5) help <black box type> \n         (6) help <black box name>";
    info.help = "Effect :\n         (1) Lists all available commands;\n         (2) Prints help on a particular command; \n         (3) Lists the packages loaded and their black boxes.\n             Add 'all' to list adaptors; \n         (4) Prints short help on the black boxes of a package.\n             Add 'all' to include adaptors; \n         (5) Prints full help on a black box type; \n         (6) Prints information on the inputs, outputs and connections of a black box instance.";
    mCommandDict[info.keyword] = info;

    info.keyword = "message";
    info.argmin = 0;
    info.argmax = 2;
    info.code = cMessage;
    info.syntax = "message <kind> <level>";
    info.help = "Sets the level of the kind of messages <kind> to <level>.\n  If kind='All' then sets the level for all kinds. If no kind nor level is passed then prints info on available kinds of messages and their current level.";  mCommandDict[info.keyword] = info;

    info.keyword = "include";
    info.argmin = 1;
    info.argmax = 2;
    info.code = cInclude;
    info.syntax = "include <filename> [source]";
    info.help = "Includes the file <filename>.\n  'source' : If the keyword 'source' is provided then informs bbi that the included file is the source of the current box definition (Advanced; used to get the right 'Include' field in html doc of packages 'appli' scripts).";
    mCommandDict[info.keyword] = info;

    info.keyword = "quit";
    info.argmin = 0;
    info.argmax = 0;
    info.code = cQuit;
    info.syntax = "quit";
    info.help = "Quits the program (during script execution it stops the complete execution)";
    mCommandDict[info.keyword] = info;

    info.keyword = "load";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cLoad;
    info.syntax = "load <packagename>";
    info.help = "Loads the black box package <packagename>";
    mCommandDict[info.keyword] = info;

    info.keyword = "unload";
    info.argmin = 1;
    info.argmax = 1;
    info.code = cUnload;
    info.syntax = "unload <packagename>";
    info.help = "Unloads the black box package <packagename>";
    mCommandDict[info.keyword] = info;

    info.keyword = "graph";
    info.argmin = 0;
    info.argmax = 6;
    info.code = cGraph;
    info.syntax = "graph [ BlackBoxName [ Detail 0..1 [ Level 0..99999 [ Output html file [ Custom header [ Custom title ]]]]]] \n         graph [ BlackBoxNameType [ Detail 0..1 [ Level 0..99999 [ Output html file [ Custom header [ Custom title ]]]]]]";
    info.help = "Shows a graphical view of a bbtk pipeline.\n- BlackBoxName : name of the box to view. Default '.' : current box.\n- BlackBoxNameType : name of the type of box to view, ex : 'workspace')";
    mCommandDict[info.keyword] = info;

    info.keyword = "object";
    info.argmin = 0;
    info.argmax = 1;
    info.code = cObject;
    info.syntax = "object <object name>";
    info.help = "Provides debug info on object <object name>";
    mCommandDict[info.keyword] = info;

    /*
    info.keyword = "workspace";
    info.argmin = 1;
    info.argmax = 2;
    info.code = cWorkspace;
    info.syntax = "workspace < ( freeze | unfreeze ) | ( rename <newname> ) >";
    info.help = "Configures the workspace.\n        'freeze' allow to block execution commands while keeping definition commands active. 'unfreeze' turns back the worspace in 'normal' mode.\n      'rename' allow to set a new name to the workspace.";
    mCommandDict[info.keyword] = info;
    */

    bbtkDebugDecTab("Interpreter",9);

  } 
  //=======================================================================
  
  
  
  //=======================================================================  
  /**
   *  
   */
  Interpreter::~Interpreter()
  {
    bbtkDebugMessageInc("Interpreter",9,"==> Interpreter::~Interpreter()" <<std::endl);
    mVirtualExecuter = VirtualExec::Pointer();
    bbtkDebugMessageInc("Interpreter",9,"<== Interpreter::~Interpreter()" <<std::endl);
  }
  //=======================================================================


  InterpreterError::InterpreterError( const std::string& message,
				      bool in_script_file,
				      const std::string& script_file,
				      int script_line 
				      )
    : Exception("Interpreter",0,message),
      mInScriptFile(in_script_file),
      mScriptFile(script_file),
      mScriptLine(script_line)
  {
  }
  InterpreterError::InterpreterError( const Exception& excep,
		      bool in_script_file,
		      const std::string& script_file,
		      int script_line 
		      )
    : Exception(excep),
      mInScriptFile(in_script_file),
      mScriptFile(script_file),
      mScriptLine(script_line)
  {
  }
  //=======================================================================
  void Interpreter::CatchBbtkException( const bbtk::Exception& e )
  {
    if (mThrow) 
      {
	bool in_script = false;
	std::string file("");
	int line = 0;
	if (mFileName.size()) {
	  std::ifstream* fs = dynamic_cast<std::ifstream*>(mFile.back());
	  if (fs!=0) in_script = true;	  
	  file = mFileName.back();
	  line = mLine.back();
	}   
	CloseAllFiles();
 	throw InterpreterError(e,in_script,file,line);
      }
    else
      {
	std::stringstream mess;
	mess << "* ERROR : "<<e.GetMessage()<<std::endl;
	if (mFileName.size()) {
	  mess << "* FILE  : \""<<mFileName.back()<<"\""<<std::endl;
	  mess << "* LINE  : "<<mLine.back()<<std::endl;
	}    
	std::cerr << mess.str();
      }
  }
  //=======================================================================
  
  //=======================================================================
  void Interpreter::CatchStdException( const std::exception& e )
  {  
    if (mThrow) 
      {
	bool in_script = false;
	std::string file("");
	int line = 0;
	if (mFileName.size()) {
	  std::ifstream* fs = dynamic_cast<std::ifstream*>(mFile.back());
	  if (fs!=0) in_script = true;	  
	  file = mFileName.back();
	  line = mLine.back();
	}    
 	CloseAllFiles();
	throw InterpreterError(e.what(),in_script,file,line);
      }
    else
      {
	std::stringstream mess;
	mess << "* ERROR : "<<e.what()<<std::endl;
	if (mFileName.size()) {
	  mess << "* FILE  : \""<<mFileName.back()<<"\""<<std::endl;
	  mess << "* LINE  : "<<mLine.back()<<std::endl;
	}    
	std::cerr << mess.str();
      }
  }
  //=======================================================================

  //=======================================================================
  void Interpreter::CatchUnknownException()
  {
    if (mThrow) 
      {
	bool in_script = false;
	std::string file("");
	int line = 0;
	if (mFileName.size()) {
	  std::ifstream* fs = dynamic_cast<std::ifstream*>(mFile.back());
	  if (fs!=0) in_script = true;	  
	  file = mFileName.back();
	  line = mLine.back();
	}    
 	CloseAllFiles();
	throw InterpreterError("Unknown exception caught",
				   in_script,file,line);
      }
    else
      {
	std::stringstream mess;
	mess << "* UNDEFINED ERROR (not a bbtk nor a std exception)" 
	     << std::endl;
	if (mFileName.size()) {
	  mess << "* FILE  : \""<<mFileName.back()<<"\""<<std::endl;
	  mess << "* LINE  : "<<mLine.back()<<std::endl;
	}    
	std::cerr << mess.str();
      }
  }
  //=======================================================================

  //=======================================================================

#define CATCH_MACRO				\
  catch (QuitException e)			\
    {						\
      status = Interpreter_QUIT;		\
      if (mThrow) throw QuitException();	\
    }						\
  catch (bbtk::Exception e)			\
    {						\
      status = Interpreter_ERROR;		\
      CatchBbtkException(e);			\
    }						\
  catch (std::exception& e)			\
    {						\
      status = Interpreter_ERROR;		\
      CatchStdException(e);			\
    }						\
  catch (...)					\
    {						\
      status = Interpreter_ERROR;		\
      CatchUnknownException();			\
    }						
  //=======================================================================
   

  //=======================================================================
  /**
   *  
   */
  Interpreter::ExitStatus Interpreter::InterpretFile( const std::string& filename )
  {
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::InterpretFile(\""<<filename<<"\")"<<std::endl);

    bool exm = mCommandLine;
    mCommandLine = false;

    ExitStatus status = Interpreter_OK;

    try 
    {
      SwitchToFile(filename);

      bool insideComment = false; // for multiline comment
      while (mFile.size()>0) 
      {
	while (!mFile.back()->eof()) {
	  mLine.back()++;
	  char buf[500];
	  mFile.back()->getline(buf,500);
	  std::string str(buf);
	  int size=str.length();
	  if ( str[ size-1 ]==13  )
            {
	      str.erase(size-1,1);
            }
	  
	  InterpretLine(str, insideComment);
	  
       }//while
       CloseCurrentFile();
      }
    }
    CATCH_MACRO;
    
    CloseAllFiles();
    bbtkDebugMessage("Interpreter",9,"EO Interpreter::InterpretFile(\""<<filename<<"\")"<<std::endl);
    bbtkDecTab("Interpreter",9);

    mCommandLine = exm;
    
    return status;
  }
  //=======================================================================


  //=======================================================================
  /**
   *  
   */
  Interpreter::ExitStatus 
  Interpreter::InterpretBuffer( std::stringstream* buffer )
  {
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::InterpretBuffer()"<<std::endl);

    bool exm = mCommandLine;
    mCommandLine = false;

    ExitStatus status = Interpreter_OK;

    try 
    {
      SwitchToStream(buffer);
      bool insideComment = false; // for multiline comment
      while (mFile.size()>0) 
      {
	while (!mFile.back()->eof()) {
	  mLine.back()++;
	  char buf[500];
	  mFile.back()->getline(buf,500);
	  std::string str(buf);
	  
	  int size=str.length();
	  if ( str[ size-1 ]==13  )
            {
	      str.erase(size-1,1);
            }
	  
	  InterpretLine(str, insideComment);
	  
	}//while
	
	CloseCurrentFile();
      }
    }
    CATCH_MACRO;
    
    CloseAllFiles();
    bbtkDebugMessage("Interpreter",9,"EO Interpreter::InterpretBuffer()"<<std::endl);
    bbtkDecTab("Interpreter",9);
    
    mCommandLine = exm;
    return status;
  }
  //=======================================================================

  //=======================================================================
  /// Runs the interpretation of a command
  Interpreter::ExitStatus Interpreter::InterpretLine( const std::string& line )
  {
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::InterpretLine('"<<line<<"')"<<std::endl);

    ExitStatus status = Interpreter_OK;

    try 
    {
      bool insideComment = false;
      InterpretLine(line, insideComment);
    }
    CATCH_MACRO;
  

    bbtkDebugMessage("Interpreter",9,"EO Interpreter::InterpretLine()"
		     <<std::endl);
    bbtkDecTab("Interpreter",9);
    
    return status;
  }
  

  //=======================================================================  
  /**
   *
   */
void Interpreter::InterpretLine( const std::string& line, bool &insideComment )
{
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::InterpretLine(\""<<line<<"\")"<<std::endl);
    bbtkMessage("echo",2,line<<std::endl);

    std::vector<std::string> words;
    SplitLine(line,words);

    // Empty line
    if (words.size()<1) 
    {
       bbtkDebugDecTab("Interpreter",9);
       return;
    }

    // Single line comment : # or //
    if ( words[0][0]=='#' || (words[0][0]=='/' && words[0][1]=='/') ) 
    {  
       bbtkDebugDecTab("Interpreter",9);
       bbtkMessage("Interpreter",9,"Comment"<<std::endl);
       return;
    }

    // Multi line comment ( /* ... */ ) -delimiters on different lines !-
    
    if (words[0][0]=='/' && words[0][1]=='*') 
    {  
       bbtkDebugDecTab("Interpreter",9);
       bbtkMessage("Interpreter",9,"In multiline comment"<<std::endl);
       insideComment = true;
       return;
    }

    if (words[0][0]=='*' && words[0][1]=='/') 
    {  
       bbtkDebugDecTab("Interpreter",9);
       bbtkMessage("Interpreter",9,"Out multiline comment"<<std::endl);
       if ( !insideComment ) {
          bbtkDebugDecTab("Interpreter",9);
          bbtkMessage("Interpreter",9,"Comment mismatch : '*/' with no matching '/*'"<<std::endl);       
       }
       insideComment = false;
       return;
    }

    if (insideComment) 
    {  
       bbtkDebugDecTab("Interpreter",9);
       bbtkMessage("Interpreter",9,"Multiline Comment"<<std::endl);
       return;
    }

    // Command 
    CommandInfoType command;
    InterpretCommand(words,command);

    bbtkDebugMessage("Interpreter",9,
                     "Command='"<<command.keyword
                      <<"' code="<<command.code<<std::endl); 
    int level=0;
    std::string left,right,left2,right2;
    std::string filename;
    switch (command.code) 
    {
      case cNew :
        mVirtualExecuter->Create(words[1],words[2]);
        break;

      case cDelete :
	mVirtualExecuter->Destroy(words[1]);
        break;

      case cConnect :
        Utilities::SplitAroundFirstDot(words[1],left,right);
        Utilities::SplitAroundFirstDot(words[2],left2,right2);      
        mVirtualExecuter->Connect(left,right,left2,right2);
        break;

      case cPackage :
        mVirtualExecuter->BeginPackage(words[1]);
        break;

      case cEndPackage :
        mVirtualExecuter->EndPackage();
        break;

      case cDefine :
        if (mFileName.size()>0) 
        {
	  filename = mIncludeFileName.back(); //Utilities::get_file_name(mFileName.back());
        }
        if (words.size()==2) 
        {
           mVirtualExecuter->Define(words[1],"",filename);
        }
        else
        {
           mVirtualExecuter->Define(words[1],words[2],filename);
        }
        break;

      case cEndDefine :
        mVirtualExecuter->EndDefine();
        break;

      case cKind :
        mVirtualExecuter->Kind(words[1]);
        break;

      case cPrint :
        mVirtualExecuter->Print(words[1]);
        break;
        
      case cExec :
        if (words[1]=="freeze") 
          mVirtualExecuter->SetNoExecMode(true);
        else if (words[1]=="unfreeze") 
          mVirtualExecuter->SetNoExecMode(false);
        else
          mVirtualExecuter->Execute(words[1]);
        break;

      case cInput :
        Utilities::SplitAroundFirstDot(words[2],left,right);
        mVirtualExecuter->DefineInput(words[1],left,right,words[3]);
        break;

      case cOutput :
        Utilities::SplitAroundFirstDot(words[2],left,right);
        mVirtualExecuter->DefineOutput(words[1],left,right,words[3]);
        break;

      case cSet :
        Utilities::SplitAroundFirstDot(words[1],left,right);
        mVirtualExecuter->Set(left,right,words[2]);
        break;

      case cAuthor :
        mVirtualExecuter->Author(words[1]);
        break;

      case cNewGUI :
        NewGUI(words[1],words[2]);
        break;

      case cCategory :
        mVirtualExecuter->Category(words[1]);
        break;

      case cIndex :
        if (words.size()==1)
	     Index("tmp_index.html");
        else if (words.size()==2)
	     Index(words[1]);
        else if (words.size()==3)
	     Index(words[1],words[2]);
        break;

      case cDescription :
        mVirtualExecuter->Description(words[1]);
        break;

      case cHelp :
        Help(words);
        break;

      case cMessage : 
        if (words.size()<3)
        {
	  mVirtualExecuter->HelpMessages();
        }
        else
        {
	  sscanf(words[2].c_str(),"%d",&level);
          mVirtualExecuter->SetMessageLevel(words[1],level);
        }
        break;

      case cGraph :
        Graph(words);
        break;

      case cConfig :
        Config();
        break;

      case cReset :  
	Reset();
        break;

      case cInclude :
        if (mCommandLine)
        {
           InterpretFile(words[1]); 
        }
        else
        {
            SwitchToFile(words[1]);
        }
	// if 'source' was given
	if (words.size()==3) 
	  {
	    GetExecuter()->SetCurrentFileName(words[1]);
	  }
        break;

      case cLoad:
        GetExecuter()->LoadPackage(words[1]);
        break;

      case cUnload:
        GetExecuter()->UnLoadPackage(words[1]);
        break;

      case cQuit :
        throw QuitException();
        break;

      case cObject :
	if (words.size()==2) ObjectInfo(words[1]);
	else ObjectInfo("");
        break;
	/* obsolete
      case cWorkspace :
        if (words.size() == 2) 
        {
           if (words[1]=="freeze")        mVirtualExecuter->SetNoExecMode(true);
           else if (words[1]=="unfreeze") mVirtualExecuter->SetNoExecMode(false);
        }
        else
        {
           mVirtualExecuter->SetWorkspaceName(words[2]);
        }
        break;
        */
      default:
        bbtkInternalError("should not reach here !!!");
   }

   bbtkDecTab("Interpreter",9);
}
  //=======================================================================  





  //=======================================================================
  /**
   *
   */
void Interpreter::SplitLine ( const std::string& str, std::vector<std::string>& tokens)
{
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::SplitLine(\""<<str<<"\")"<<std::endl);

    std::string delimiters = "\"";
    std::vector<std::string> quote;
    Utilities::SplitString(str,delimiters,quote);

    delimiters = " \t";
    std::vector<std::string>::iterator i;
    for (i=quote.begin(); i!=quote.end(); ) 
    {
       Utilities::SplitString(*i,delimiters,tokens);
       ++i;
       if (i!=quote.end()) 
       {
        //    bbtkDebugMessage("Interpreter",0,"\""<<*i<<"\""<<std::endl);
          tokens.push_back(*i);
          ++i;
       }
    }

    for (i=tokens.begin(); i!=tokens.end(); ++i) 
    {
       bbtkDebugMessage("Interpreter",9,"["<<*i<<"] ");
    }
    bbtkDebugMessageCont("Interpreter",9,std::endl);

    bbtkDebugDecTab("Interpreter",9);
 }
  //=======================================================================


  //=======================================================================
  void Interpreter::Reset()
  {
    // Cannot close all files if the reset command is read from a file !
    //    CloseAllFiles();
    mFileNameHistory.clear();
    this->mVirtualExecuter->Reset();
  }
  //=======================================================================

  //=======================================================================
  /**
   *
   */
  /*
  void Interpreter::Print( const std::string& str)
  {
    if (mVirtualExecuter->GetNoExecMode()) return;

    bbtkDebugMessageInc("Interpreter",9,"Interpreter::Print(\""<<str<<"\")"<<std::endl);

 // TO DO :
 // InterpretLine ("load std")
 // InterpretLine("new ConcatStrings _C_ ") -> trouver un nom unique : # commande 
 // InterpretLine("new Print _P_") 
 // InterpretLine("connect _C_.Out _P_.In")
 // int num = 1
 

    std::vector<std::string> chains;
    std::string delimiters("$");

    // Skip delimiters at beginning.
    std::string::size_type lastPos = str.find_first_not_of(delimiters, 0);
    bool is_text = true;
    if (lastPos>0) is_text = false;

    // Find first delimiter.
    std::string::size_type pos     = str.find_first_of(delimiters, lastPos);

    while (std::string::npos != pos || std::string::npos != lastPos)
    {
       if (is_text) 
       {
          // Found a text token, add it to the vector.
          chains.push_back(str.substr(lastPos, pos - lastPos));
 // std::string token = str.substr(lastPos, pos - lastPos)
 // InterpretLine("set _C_.In%num% %token%")
 
       }
       else 
       {

       // is an output (between $$) : decode 
         std::string tok,box,output;
         tok = str.substr(lastPos, pos - lastPos);
         Utilities::SplitAroundFirstDot(tok,box,output);
         chains.push_back( mVirtualExecuter->Get(box,output) );

// InterpretLine("connect %tok% _C_.In%num%") 

       }
        // Skip delimiters.  Note the "not_of"
       lastPos = str.find_first_not_of(delimiters, pos);
        // Find next delimiter
       pos = str.find_first_of(delimiters, lastPos);
    //
       is_text = !is_text;
// num ++;
     }
// InterpretLine("exec _P_")
// if (IS_IN_WORKSPACE) InterpretLine("delete _C_; delete _P_");

     std::vector<std::string>::iterator i;
     for (i= chains.begin(); i!=chains.end(); ++i) 
     {

       Utilities::SubsBackslashN(*i);
       std::cout << *i;
     }
     std::cout << std::endl;
     bbtkDebugDecTab("Interpreter",9);
 }
*/

  //=======================================================================
  /**
   *
   */

  // =========================================================================
  void Interpreter::SwitchToFile( const std::string& name )
  {
  // Note : in the following :
  // name : the user supplied name 
  //      - abreviated name    e.g.       scr   scr.bbs
  //      - relative full name e.g.       ./scr.bbs   ../../scr.bbs 
  //      - absolute full name e.g.       /home/usrname/proj/dir/scr.bbs
  //          same for Windows, with      c:, d: ...
  //
  // use ./directory/subdir/scrname.bbs
  //

    bbtkDebugMessageInc("Interpreter",9,"Interpreter::SwitchToFile( \""
                         <<name<<"\")"<<std::endl);

    std::vector<std::string> script_paths;
    std::string fullPathScriptName;  // full path script name
    std::string pkgname;             // e.g. <scriptname>.bbs
    std::vector<std::string> Filenames;

    // The following is *NOT* a debug time message :
    // It's a user intended message.
    // Please don't remove it.
    bbtkMessage("Interpreter",1,
        "look for : [" << name
        << "]" << std::endl);


    std::string upath;
    pkgname = Utilities::ExtractScriptName(name,upath);

    bbtkMessage("Interpreter",3,
		"extract : pkgname [" << pkgname
		 << "] upath [" << upath << "]" << std::endl);
    bool fullnameGiven = false; 
    bool foundFile     = false;

    // ==== "*" provided : load all scripts in given path 
    // relative (e.g. std/boxes/*) or absolute 
    if (pkgname == "*") 
      {
	int nbBssFiles;
	
	std::stringstream* stream = new std::stringstream;
	//if (upath.size()!=0) // avoid troubles for "*"
	
	// ==== no path provided : look in root bbs path
	if (upath.size()==0)
	  {
	    //	    bbtkMessage("Interpreter",1,
	    script_paths.push_back(  ConfigurationFile::GetInstance().Get_root_bbs_path() );
	  }
	// ==== absolute path provided 
	else if (upath[0]=='/' || upath[1] == ':' ) 
	  {
	    if ( Utilities::IsDirectory( upath ) )
	      {
		script_paths.push_back(upath);
	      }
	    else 
	      {
		bbtkError("'"<<upath<<"' : directory does not exist"); 
	      }
	  }
	// ==== relative path provided : search all bbs path appended with 
	// the relative path provided
	else
	  {    
	     std::vector<std::string>::const_iterator i;
	     for (i=ConfigurationFile::GetInstance().Get_bbs_paths().begin();
		  i!=ConfigurationFile::GetInstance().Get_bbs_paths().end();
		  i++)
	       {
		 std::string full_path(*i);
		 // we *really* want '.' to be the current working directory
		 if (full_path == ".") {
		   char buf[2048]; // for getcwd
		   char * currentDir = getcwd(buf, 2048);
		   std::string cwd(currentDir);
		   full_path = currentDir;
		 } // if full_path
	    
		 full_path += ConfigurationFile::GetInstance().Get_file_separator();
		 full_path += upath;

		 if ( Utilities::IsDirectory( full_path ) )
		   {
		     script_paths.push_back(full_path);
		   }
	       } 
	     if (script_paths.empty())
	       {
		 bbtkError("no '"<<upath<<"' subdir found in search paths" 
			   << std::endl);
	       }

	  }
	// === search paths list complete : now explore it


	std::vector<std::string>::iterator i;
	for (i=script_paths.begin();i!=script_paths.end();i++)// ==== relative name, iterate + load all .bbs files
	  {
	    bbtkMessage("Interpreter",1,
			"--> Looking in '" << *i << "'" << std::endl);
	 
	    
	    Filenames.clear();
	    int nbFiles = Utilities::Explore(*i, false, Filenames);
	    
	    nbBssFiles = 0;
	    for (std::vector<std::string>::iterator j = Filenames.begin(); 
		 j!= Filenames.end(); ++j)
	      {
		int lgr = (*j).size();
		if (lgr < 5)
		  continue;  // ignore non .bbs file
		if ((*j).substr(lgr-4, 4) != ".bbs")
		  continue;
		
		(*stream) << "include \"" << *j << "\"\n";
		bbtkMessage("Interpreter",2,
			    "  --> Found '" << *j << "'" << std::endl);
		
		nbBssFiles++;
	      } // for vector
	    
	    if (nbBssFiles==0)
	      {
		bbtkMessage("Interpreter",1,
			    "  --> No .bbs found"<< std::endl);
	      } 
	    else 
	      {
		bbtkMessage("Interpreter",1,
			    "  --> "<<nbBssFiles<<" .bbs found"<< std::endl);
		SwitchToStream(stream);
	      }
	    
	    //break; // a directory was found; we stop iterating
	    // LG : No! We want all files included !
	  } // for vector
	return;
      }  
    //=============== end pkgname=="*" ===========


    // if name starts with a / or a . or contains : user is assumed to have passed a relative/absolute name
    // (not only a plain script name)
    // we trust him, and try to expland the directory name
    // WARNING : starting from current local directory :  ./whatYouWant  (./ mandatory!)

    if (name[0]=='/' || name[1] == ':' || name[0]=='.')  // absolute path (linux/windows) or relative path
    { 

      // ===========================================================check user supplied location
      fullnameGiven = true;

      fullPathScriptName =  Utilities::ExpandLibName(name, false);

      // allow user to always forget ".bbs"
      int l = fullPathScriptName.size();

      if (l!=0) {

      if (l>4)
      {
         if (fullPathScriptName.substr(l-4, 4) != ".bbs")
         {
            fullPathScriptName = fullPathScriptName + ".bbs";
         }
      }
      else
      {
         fullPathScriptName = fullPathScriptName + ".bbs";   
      }

      if ( Utilities::FileExists(fullPathScriptName))
      {
        foundFile = true;
      }
    } // endif l != 0
  }
  else
    // =============================== iterate on the paths
    {
      script_paths = ConfigurationFile::GetInstance().Get_bbs_paths();
      std::string path;
      std::vector<std::string>::iterator i;
      for (i=script_paths.begin();i!=script_paths.end();++i)
	{
	  path = *i;
	  // we *really* want '.' to be the current working directory
	  if (path == ".") {
	    char buf[2048]; // for getcwd
	    char * currentDir = getcwd(buf, 2048);
	    std::string cwd(currentDir);
	    path = currentDir;
	  }
	  
	  fullPathScriptName = Utilities::MakePkgnameFromPath(path, name, true);
	  
	  // Check if library exists
	  if ( ! Utilities::FileExists(fullPathScriptName) )
	    {
	      // The following is *NOT* a debug time message :
	      // It's a user intended message.
	      // Please don't remove it.
	      bbtkMessage("Interpreter",2,
			  "   [" <<fullPathScriptName <<"] : doesn't exist" 
			  <<std::endl);
	      continue;  // try next path
	    }
	  bbtkMessage("Interpreter",2,
		      "   [" <<fullPathScriptName 
		      <<"] : found" <<std::endl);
	  foundFile = true;
	  break; // a script was found; we stop iterating

	} //------------------ // end for ( package_paths.begin();i!=package_paths.end() )
    }
    
    if (!foundFile)
      {
	if (fullnameGiven)
	  if(fullPathScriptName == "")
            bbtkError("Path ["<<upath<<"] doesn't exist");
	  else
            bbtkError("Script ["<<fullPathScriptName<<"] not found");
	else
          bbtkError("No ["<<pkgname<<".bbs] script found");
	return;
      }
    else
      LoadScript(fullPathScriptName,name);
    
    return;
  }
  //=======================================================================


  //=======================================================================
void Interpreter::SwitchToStream( std::stringstream* stream )
{
    mFile.push_back(stream);
    std::ostringstream buffer_name;
    bufferNb++;
    buffer_name << "buffer_" ;

    if (mFileName.size()>0 )
    {
       buffer_name << mFileName.back() << "_" << mLine.back();
    }
    mFileName.push_back(buffer_name.str());
    mIncludeFileName.push_back(buffer_name.str());
    mLine.push_back(0);
}
  //=======================================================================

  //=======================================================================

  void Interpreter::LoadScript( std::string fullPathScriptName,
				std::string includeScriptName)
  {
     Utilities::replace( fullPathScriptName , 
			 INVALID_FILE_SEPARATOR , VALID_FILE_SEPARATOR);
   
     if (find(mFileNameHistory.begin(),
	      mFileNameHistory.end(),
	      fullPathScriptName)!=mFileNameHistory.end())
     {
        return;
     }

    std::ifstream* s;
    s = new std::ifstream;
    s->open(fullPathScriptName.c_str());
    if (!s->good())
    {
        bbtkError("Could not open file ["<<fullPathScriptName<<"]");
        return;
    }

    bbtkMessage("Interpreter",1,"   -->[" << fullPathScriptName 
		<< "] found" << std::endl);

    mFile.push_back(s);
    mFileName.push_back(fullPathScriptName);
    mFileNameHistory.push_back(fullPathScriptName);
    mIncludeFileName.push_back(includeScriptName);
    mLine.push_back(0);

    return;
  }

  //=======================================================================
  /**
   *  
   */
  void Interpreter::CloseCurrentFile()
  {
    bbtkDebugMessage("Interpreter",9,"Interpreter::CloseCurrentFile()"
                      <<std::endl);

    if (mFile.size()==0)
    {
      bbtkDebugMessage("Interpreter",9," -> no file left open"<<std::endl);
      return;
    }

    bbtkDebugMessage("Interpreter",9," Closing file '"<<mFileName.back()<<"'"<<std::endl);

    std::ifstream* file = dynamic_cast<std::ifstream*>(mFile.back());
    if (file!=0) file->close();

    delete mFile.back();
    mFile.pop_back();
    mFileName.pop_back();
    mIncludeFileName.pop_back();
    mLine.pop_back();

    bbtkDebugMessage("Interpreter",9," Remains "
                     <<mFile.size()
                     <<" open"<<std::endl);
    bbtkDebugMessage("Interpreter",9,"EO Interpreter::CloseCurrentFile()"
                     <<std::endl);
  }
  //=======================================================================

 //=======================================================================
  /**
   *  
   */
  void Interpreter::CloseAllFiles()
  {
    bbtkDebugMessage("Interpreter",9,"Interpreter::CloseAllFiles()"
                      <<std::endl);

    while (mFile.size() != 0) 
    {
       CloseCurrentFile();
    }
    bbtkDebugMessage("Interpreter",9,"EO Interpreter::CloseAllFiles()"
                      <<std::endl);
  }
  //=======================================================================



  //=======================================================================
  /**
   *  
   */
  void Interpreter::InterpretCommand( const std::vector<std::string>& words,
                                      CommandInfoType& info )
  {
    bbtkDebugMessageInc("Interpreter",9,"Interpreter::InterpretCommand(...)"<<std::endl);

    // searches the command keyword
    CommandDictType::iterator c;
    c = mCommandDict.find(words[0]);
    if ( c == mCommandDict.end() ) {
      bbtkError(words[0]<<" : unknown command");
    }

    // tests the number of args 
    if ( ( words.size()-1 < c->second.argmin ) ||
         ( words.size()-1 > c->second.argmax ) )
    {
       HelpCommand(words[0]);
       bbtkError(words[0]<<" : wrong number of arguments");
    }

    info = c->second;
    bbtkDecTab("Interpreter",9);
  }
  //=======================================================================


  //=======================================================================
  /// Displays help on all the commands
void Interpreter::Help(const std::vector<std::string>& words)
{
    unsigned int nbarg = words.size()-1;

    if (nbarg==0) 
    {
       HelpCommands();
    }
    else if (nbarg==1) 
    {
      if (words[1]=="packages") 
      {
         GetExecuter()->GetFactory()->PrintPackages(true);
         return;
      }
      try 
      {
          HelpCommand(words[1]);
      }
      catch (bbtk::Exception e) 
      {
         try 
         {
            GetExecuter()->GetFactory()->HelpPackage(words[1]);
	    if ( mUser != 0 )
	      {
		std::string url = 
		  ConfigurationFile::GetInstance().Get_doc_path();
		url += "/bbdoc/" + words[1] + "/index.html";
		if (Utilities::FileExists(url)) 
		  {
		    mUser->InterpreterUserViewHtmlPage(url);
		  }
	      }
         }
         catch (bbtk::Exception f) 
         {
	   try 
	     {
	       std::string package;
	       GetExecuter()->GetFactory()->HelpBlackBox(words[1],package);
	       if ( mUser != 0 )
		 {
		   std::string url = 
		     ConfigurationFile::GetInstance().Get_doc_path();
		   url += "/bbdoc/" + package + "/index.html";
		   if (Utilities::FileExists(url)) 
		     {
		       url += "#" + words[1];
		       mUser->InterpreterUserViewHtmlPage(url);
		     }
		 }
	     }
	   catch (bbtk::Exception g) 
	     {
	       try
		 {
		   GetExecuter()->ShowRelations(words[1],"0","9999");
		 }
	       catch (bbtk::Exception h){
		 bbtkError("\""<<words[1].c_str()
			   <<"\" is not a known command, package, black box type or black box name");
	       }
	     }
         }
      }
    }
    else if (nbarg==2) 
    {
      if (words[2]=="all")
      {
         if ( words[1]=="packages" )
         {
            GetExecuter()->GetFactory()->PrintPackages(true,true);
            return;
          }
         try 
         {
            GetExecuter()->GetFactory()->HelpPackage(words[1],true);
         }
         catch (bbtk::Exception f) 
         {
         }
     }
     else 
     {
        HelpCommand(words[0]);
        bbtkError(words[0]<<" : syntax error");
     }
  }
  else 
  {
     bbtkError("Should not reach here !!!");
  }
}
  //=======================================================================

   //===================================================================    
  /// Displays the Configuration
  void Interpreter::Config() const
  {
    ConfigurationFile::GetInstance().GetHelp(1);
  }  
   //===================================================================    

  //=======================================================================
  /// Displays help on all the commands
  void Interpreter::HelpCommands()
  {
    std::cout << "Available commands :" << std::endl;
    CommandDictType::iterator i;
    for ( i =  mCommandDict.begin();
          i != mCommandDict.end();
        ++i) {
              std::cout << " " << i->first << std::endl;
      //      std::cout << "   usage : " << i->second.syntax << std::endl;
      //     std::cout << "    " << i->second.help << std::endl;

    }
  }
  //=======================================================================


  //=======================================================================
  /// Displays help on a particular commands
  void Interpreter::HelpCommand(const std::string& s)
  {
    CommandDictType::iterator c;
    c = mCommandDict.find(s);
    if ( c == mCommandDict.end() ) {
      bbtkError(s<<" : Unknown command");
    }
    //    std::cout << " " << s << " : "<<  std::endl;
    //    CommandParamDictType::iterator i;
    //    for ( i =  c->second.begin();
    //      i != c->second.end();
    //      ++i) {
    std::cout << " usage : " << c->second.syntax << std::endl;
    std::cout << "  " << c->second.help << std::endl;

  }
  //=======================================================================


  //=======================================================================
  /// Fills the vector commands with the commands which 
  /// have the first n chars of buf for prefix
  /// TODO : skip initial spaces in buf and also return the position of first
  /// non blank char in buf
  void Interpreter::FindCommandsWithPrefix( char* buf,
                                            int n,
                                            std::vector<std::string>& commands )
  {
    CommandDictType::const_iterator i;
    for (i=mCommandDict.begin(); i!=mCommandDict.end(); ++i)
    {
      if ((i->first).find(buf,0,n) == 0) 
        commands.push_back(i->first);
    }
  }
  //=======================================================================



  //=======================================================================
#ifdef BBTK_USE_TERMIOS_BASED_PROMPT
  
  inline void PrintChar(char c) { write(STDOUT_FILENO,&c,1); }
  inline void BackSpace() { write(STDOUT_FILENO,"\b \b",3); }
  
  // LG : KEYBOARD CODES AS SCANNED ON MY TTY : UNIVERSAL ?
  // IF NOT THE USER SHOULD BE ABLE TO CONFIGURE IT
  // E.G. STORE THIS IN bbtk_config.xml
#define BBTK_UP_ARROW_KBCODE    0x00415B1B
#define BBTK_DOWN_ARROW_KBCODE  0x00425B1B
#define BBTK_RIGHT_ARROW_KBCODE 0x00435B1B
#define BBTK_LEFT_ARROW_KBCODE  0x00445B1B
#define BBTK_BACKSPACE_KBCODE   0x00000008
#define BBTK_DEL_KBCODE         0x0000007F
#define BBTK_SPACE_KBCODE       0x00000020 

  //=======================================================================
  void Interpreter::GetLineFromPrompt(std::string& s)
  {
    int c;
    int ind=0;

    int MAX_LINE_SIZE = 160;
    int MAX_HISTORY_SIZE = 100;

    char* newline = new char[MAX_LINE_SIZE];
    memset(newline,0,MAX_LINE_SIZE);
    char* histline = new char[MAX_LINE_SIZE];
    memset(histline,0,MAX_LINE_SIZE);

    char* line = newline;
    int hist = mHistory.size();

    write(1,"> ",2);
    while(1)
    {
       c=0;
       read ( STDIN_FILENO, &c, 4) ;

       bbtkDebugMessage("debug",9,"[0x"<<std::hex<<c<<"]\n");

       // Printable character
       if ( (ind<MAX_LINE_SIZE-1) &&
            ( c >= BBTK_SPACE_KBCODE ) && 
            ( c <  BBTK_DEL_KBCODE )) 
       {
          PrintChar(c);
          line[ind++]=c;
       }
      // CR
       else if (c=='\n')
       {
       // delete the unused line
          if (line==newline)
              delete histline;
          else
              delete newline;
   
    // empty lines are not stored in from history
          if (strlen(line)) 
          {
             // if history too long : delete oldest command
             if (mHistory.size()>MAX_HISTORY_SIZE) 
             {
                delete mHistory.front();
                mHistory.pop_front();
             }
             mHistory.push_back(line);
          }
          break;
        }
       // Backspace
        else if ( (ind>0) && 
		  ((c == BBTK_BACKSPACE_KBCODE) ||
		   (c == BBTK_DEL_KBCODE)) )
	  {
	    line[ind--]=' ';
	    BackSpace();
	  }
	// Tab 
	else if (c=='\t')
	  {
	    // TODO : Command completion  
	    std::vector<std::string> commands;
	    FindCommandsWithPrefix( line,ind,commands);
	    if (commands.size()==1) 
	      {
		std::string com = *commands.begin();
		for (; ind<com.size(); ++ind) 
		  {
		    PrintChar(com[ind]); 
		    line[ind]=com[ind];
		  }
		PrintChar(' '); 
		line[ind++]=' ';
	      }
	    else if (commands.size()>1) 
	      {
		std::vector<std::string>::iterator i;
		write(1,"\n",1);
		for (i=commands.begin();i!=commands.end();++i) 
		  {
		    write(STDOUT_FILENO,(*i).c_str(),strlen((*i).c_str()));
		    PrintChar(' ');
		  }
		write(STDOUT_FILENO,"\n> ",3);
		//for (int j=0;j<ind;++j) 
		  //{
		    write(STDOUT_FILENO,line,ind); 
		    //  }
	      }
	  }
	// Arrow up : back in history
	else if (c==BBTK_UP_ARROW_KBCODE)
	  {
	    if (hist) 
	      {
		// erase current line
		while (ind--) BackSpace();
		// 
		hist--;
		// 
		strcpy(histline,mHistory[hist]);
		line = histline;
		ind = strlen(line);
		
		write(STDOUT_FILENO,line,ind);
	      }
	  }
	// Arrow down : down in history
	else if (c==BBTK_DOWN_ARROW_KBCODE)
	  {
	    if (hist<mHistory.size()-1) 
	      {
		// erase current line
		while (ind--) BackSpace();
		// 
		hist++;
		// 
		strcpy(histline,mHistory[hist]);
		line = histline;
		ind = strlen(line);
		
		write(STDOUT_FILENO,line,ind);
	      }
	    // end of history : switch back to newline
	    else if (hist==mHistory.size()-1)
	      {
		// erase current line
		while (ind--) BackSpace();
		// 
		hist++;
		// 
		line = newline;
		ind = strlen(line);
		
		write(STDOUT_FILENO,line,ind);
	      }
	  }
	// Arrow right
	else if (line[ind]!=0 && c==BBTK_RIGHT_ARROW_KBCODE)
	  {
	    PrintChar(line[ind]);
	    ind++;
	  }

	// Arrow left
	else if (ind>0 && c==BBTK_LEFT_ARROW_KBCODE)
	  {
	    PrintChar('\b');
	    ind--;
    
	  }

      }
    write(STDOUT_FILENO,"\n\r",2);
    
    
    s = line;
    
  }
#else

  //=======================================================================
  void Interpreter::GetLineFromPrompt(std::string& s)
  {  
    s.clear();

    putchar('>');
    putchar(' ');

    do 
    {
      char c = getchar();
      if (c=='\n') 
      {
        putchar('\n');
        break;
      }
      if (c=='\t') 
      {
        // putchar('T');
        continue;
      }
      // putchar(c);
      s += c;
    } 
    while (true);  
    
  }
  //=======================================================================  

#endif



  //=======================================================================
  void Interpreter::CommandLineInterpreter()
  {
    bbtkDebugMessageInc("Interpreter",9,
                        "Interpreter::CommandLineInterpreter()"<<std::endl);

#ifdef BBTK_USE_TERMIOS_BASED_PROMPT  
    // Initialise the tty in non canonical mode with no echo
    // oter remembers the previous settings to restore them after 
    struct termios ter,oter;
    tcgetattr(0,&ter);
    oter=ter;
    ter.c_lflag &= ~ECHO;
    ter.c_lflag &= ~ICANON;
    ter.c_cc[VMIN]=1;
    ter.c_cc[VTIME]=0;
    tcsetattr(0,TCSANOW,&ter);
#endif
    
    mCommandLine = true;
    bool again = true;
    bool insideComment = false; // for multiline comment  
    do 
    {
      try
      {
        std::string line;
        GetLineFromPrompt(line);
        InterpretLine(line, insideComment);
      }
      catch (QuitException e)
      {
	bbtkMessage("Interpreter",1,"Interpreter : Quit"<<std::endl);
        again = false;
      }
      catch (bbtk::Exception e) 
      {
        e.Print();
      }
        catch (std::exception& e) 
      {
        std::cerr << "* ERROR :: "<<e.what()<<" (not in bbtk)"<<std::endl;
      }
      catch (...)
      {
        std::cerr << "* UNDEFINED ERROR (not a bbtk nor a std exception)"<<std::endl;
      }
    }
    while (again);

#ifdef BBTK_USE_TERMIOS_BASED_PROMPT
    tcsetattr(0,TCSANOW,&oter);
#endif

    std::cout << "Good bye !" << std::endl;

    bbtkDebugDecTab("Interpreter",9);
  }

//=======================================================================
void Interpreter::Graph(const std::vector<std::string>& words)
{
  std::string page;
    bool system_display = true;

    if ( ( mUser != 0 ) && ( mUser->InterpreterUserHasOwnHtmlPageViewer() ) )
      system_display = false; 
 
    if (words.size()==1) 
    {
      page = mVirtualExecuter->ShowGraph(".","0","0","","","",system_display);
    }
    else if (words.size()==2) 
    {
      page = mVirtualExecuter->ShowGraph(words[1],"0","0","","","",system_display);
    }
    else if (words.size()==3) 
    {
      page = mVirtualExecuter->ShowGraph(words[1],words[2],"0","","","",system_display);
    }
    else if (words.size()==4) 
    {
      page = mVirtualExecuter->ShowGraph(words[1],words[2],words[3],"","","",system_display);
    } 
    else if (words.size()==5) 
    {
      page = mVirtualExecuter->ShowGraph(words[1],words[2],words[3],words[4],"","",system_display);
    } 
    else if (words.size()==6) 
    {
      page = mVirtualExecuter->ShowGraph(words[1],words[2],words[3],words[4],words[5],"",system_display);
    } 
    else if (words.size()==7) 
      {
	page = mVirtualExecuter->ShowGraph(words[1],words[2],words[3],words[4],words[5],words[6],system_display);
      } 
    
    if ( ( mUser != 0 ) && ( mUser->InterpreterUserHasOwnHtmlPageViewer() ) )
      mUser->InterpreterUserViewHtmlPage(page);

  }
//=======================================================================


//=======================================================================
void  Interpreter::Index(const std::string& filename, 
			 const std::string& type)
{
  Factory::IndexEntryType t;
  if (type=="Initials") t = Factory::Initials;
  else if (type=="Categories") t = Factory::Categories;
  else if (type=="Packages") t = Factory::Packages;
  else if (type=="Adaptors") t = Factory::Adaptors;
  
  GetExecuter()->GetFactory()->CreateHtmlIndex(t,filename);
}
//=======================================================================


//=======================================================================
void  Interpreter::NewGUI(const std::string& boxname,
			     const std::string& instanceName)
{
  if (mRealExecuter.expired())
    {
      bbtkError("command 'newgui' cannot be compiled yet");
    }

  std::string typeName = instanceName+"Type";
  std::stringstream* s = new std::stringstream;
  // create the complex box
  (*s) << "define "<<typeName<<std::endl;
  //  (*s) << "  description 'Automatically generated user interface for the box "
  //       << boxname << "'" <<std::endl;
  // create the Layout box
  (*s) << "  load wx"<<std::endl;
  (*s) << "  new LayoutLine layout"<<std::endl;
  // create the output 'Widget'
  (*s) << "  output Widget layout.Widget Widget"<<std::endl;
  // the box change output 
  (*s) << "  new MultipleInputs change"<<std::endl;
  (*s) << "  output BoxChange change.Out BoxChange"<<std::endl;

  // Browse the inputs of the box in order to find which ones are not 
  // connected and can be adapted from a widget adaptor
  // vector which stores the list of inputs of the box which must be connected
  std::vector<std::string> in;
 
  Factory::Pointer F = mVirtualExecuter->GetFactory();
  /*
  Package::Pointer user = F->GetPackage("user");
  */
  ComplexBlackBoxDescriptor::Pointer workspace = 
    mRealExecuter.lock()->GetCurrentDescriptor();

  if (workspace==0)
    {
      delete s;
      bbtkError("Interpreter::CreateGUI : could not access the executer currently defined complex box");
    }
 

  /*
    (ComplexBlackBoxDescriptor::Pointer)(user->GetBlackBoxMap().find("workspace")->second.get());
  */

  BlackBox::Pointer box = workspace->GetPrototype()->bbGetBlackBox(boxname);
  //  BlackBox::InputConnectorMapType incm = box->bbGetInputConnectorMap();
  int nb = 0;
  BlackBox::InputConnectorMapType::iterator i;
  for (i=box->bbGetInputConnectorMap().begin();
       i!=box->bbGetInputConnectorMap().end();
       ++i)
    {
      // If the input is connected : continue
      if (i->second->IsConnected()) continue;
      // Get the input descriptor 
      const BlackBoxInputDescriptor* d = box->bbGetDescriptor()->GetInputDescriptor(i->first);
      // If it is a "system" input : skip it
      if ( ( d->GetCreatorTypeInfo() == typeid(AtomicBlackBoxDescriptor)) ||
	   ( d->GetCreatorTypeInfo() == typeid(WxBlackBoxDescriptor)) )
	continue;
      bool widok = true;
      std::string widget,adaptor;
      // try to find a widget adaptor
      if (F->FindWidgetAdaptor(DataInfo(d->GetTypeInfo(),""),
			       d->GetDataInfo(),
			       adaptor))
	{
	  // command to create the adaptor
	  (*s) << "  new "<<adaptor<<" "<<i->first<<std::endl;
	  // Sets the label of the widget adaptor to the name of the input
	  (*s) << "  set "<<i->first<<".Label "<<i->first<<std::endl;
	  // Sets the initial value of the widget to the value of the input
	  (*s) << "  set "<<i->first<<".In \" "
	       <<box->bbGetInputAsString(i->first)<<"\""
	       << std::endl;
	  // store the input name
	  in.push_back(i->first);
	  (*s) << "  connect "<<i->first<<".Widget layout.Widget"<<in.size()<<std::endl;
	    //<i->first<<"'"<<std::endl;
	  (*s) << "  connect "<<i->first<<".BoxChange change.In"<<in.size()<<std::endl;
	}
      // try to find a two pieces adaptor
      else if (F->FindWidgetAdaptor2(DataInfo(d->GetTypeInfo(),""),
				     d->GetDataInfo(),
				     widget,adaptor) )
	{
	  // command to create the widget
	  (*s) << "  new "<<widget<<" "<<i->first<<"Widget"<<std::endl;
	  // command to create the adaptor
	  (*s) << "  new "<<adaptor<<" "<<i->first<<std::endl;
	  // connect the two
	  (*s) << "  connect "<<i->first<<"Widget.Out "
	       <<i->first<<".In"<<std::endl;
	  // Sets the label of the widget adaptor to the name of the input
	  (*s) << "  set "<<i->first<<"Widget.Label "<<i->first<<std::endl;
	  // Sets the initial value of the widget to the value of the input
	  (*s) << "  set "<<i->first<<"Widget.In \" "
	       <<box->bbGetInputAsString(i->first)<<"\""<< std::endl;
	  // store the input name
	  in.push_back(i->first);
	  (*s) << "  connect "<<i->first<<"Widget.Widget layout.Widget"<<in.size()<<std::endl;
	    //<i->first<<"'"<<std::endl;
	  (*s) << "  connect "<<i->first<<"Widget.BoxChange change.In"<<in.size()<<std::endl;

	}
      // try to find an adaptor from string 
      // If found then can create a text input which 
      // will be automatically adapted 
      else if (F->FindAdaptor(DataInfo(typeid(std::string),""),
			       d->GetDataInfo(),
			       adaptor))
	{
	  // command to create the adaptor
	  (*s) << "  new InputText "<<i->first<<std::endl;
	  // Sets the label of the widget adaptor to the name of the input
	  (*s) << "  set "<<i->first<<".Title "<<i->first<<std::endl;
	  // Sets the initial value of the widget to the value of the input
	  (*s) << "  set "<<i->first<<".In \" "
	       <<box->bbGetInputAsString(i->first)<<"\""<< std::endl;
	  // store the input name
	  in.push_back(i->first);
	  (*s) << "  connect "<<i->first<<".Widget layout.Widget"<<in.size()<<std::endl;
	    //<i->first<<"'"<<std::endl;
	  (*s) << "  connect "<<i->first<<".BoxChange change.In"<<in.size()<<std::endl;

	}
      else 
	{
	  widok = false;
	}
      if (widok)
	{
	  // command to create the output
	  (*s) << "  output "<<i->first<<" "
	       <<i->first<<".Out "<<i->first<<std::endl;
	    //	       <<" Output of the widget which allows to set "
	  
	}
    }   
  // Inputs for window properties
  (*s) << "  input WinTitle layout.WinTitle Title"<<std::endl;
  (*s) << "  input WinWidth layout.WinWidth Width"<<std::endl;
  (*s) << "  input WinHeight layout.WinHeight Height"<<std::endl;
  (*s) << "  input WinDialog layout.WinDialog Dialog"<<std::endl;
  (*s) << "  input WinHide layout.WinHide Hide"<<std::endl;

  
  
  // Execute the box executes the layout
  (*s) << "  exec layout" << std::endl;
  (*s) << "endefine" << std::endl;
  // (*s) << "help "<< typeName<< std::endl;
  // instanciate the box and connect it
  (*s) << "new "<<typeName<<" "<<instanceName<<std::endl;
  // connections
  std::vector<std::string>::iterator j;
  for (j=in.begin();j!=in.end();++j)
    {
      // connect
      (*s) << "connect "<<instanceName<<"."<<*j<<" "
	   << boxname<<"."<<*j<<std::endl;
    }
  // That's all folks ! now execute the commands :
  SwitchToStream(s);
}
//=======================================================================



 //==========================================================================
  void Interpreter::ObjectInfo(const std::string& name)
  {
    if ((name.length()==2)&&(name[0]=='-'))
      {
	if (name[1]=='S')
	  {
	    bbtk::StaticInitTime::PrintObjectListInfo = true;
	  }
	if (name[1]=='C')
	  {
	    //	    int o = MessageManager::GetMessageLevel("debug");
	    //	    if (o<2) MessageManager::SetMessageLevel("debug",2);
	    mVirtualExecuter->GetFactory()->CheckPackages();
	    //	    MessageManager::SetMessageLevel("debug",o);
	  }
      }
    else 
      {
	Object:: PrintObjectListInfo(name);
      }
  }
 //==========================================================================
 //==========================================================================
  std::string Interpreter::GetObjectName() const
  {
    return std::string("Interpreter");
  }
  //==========================================================================
  
  //==========================================================================
  std::string  Interpreter::GetObjectInfo() const 
  {
    std::stringstream i;
    return i.str();
  }
  //==========================================================================

  //==========================================================================
size_t  Interpreter::GetObjectSize() const 
{
  size_t s = Superclass::GetObjectSize();
  s += Interpreter::GetObjectInternalSize();
  return s;
  }
  //==========================================================================
  //==========================================================================
size_t  Interpreter::GetObjectInternalSize() const 
{
  size_t s = sizeof(Interpreter);
  return s;
  }
  //==========================================================================
  //==========================================================================
  size_t  Interpreter::GetObjectRecursiveSize() const 
  {
    size_t s = Superclass::GetObjectRecursiveSize();
    s += Interpreter::GetObjectInternalSize();
    s += mVirtualExecuter->GetObjectRecursiveSize();
    return s;
  }
  //==========================================================================
}//namespace