// TOKEN.CPP

#ifndef __TOKEN_CPP
#define __TOKEN_CPP

#include "token.h"
#include <string.h>
#include <stdlib.h>


/////////////////////////////////////////////////////////////////////////////


int Token::SeqNumber = 1;


Token::Token()
{
	strcpy( Tname, '\0' );
	strcpy( Vname, '\0' );

	LineNum = 0;
	Type = 0;
	Value = 0;

	Prev = NULL;
	Next = NULL;

// SEQ NUMBER ID
	ID = SeqNumber;
	SeqNumber++;
}


Token::Token( char *tname, char *vname, int linenum )
{
	LineNum = linenum;
	strcpy( Tname, tname );
	strcpy( Vname, vname );
	Value = -1;

	switch( *tname )
	{
		case 'K':
			Type = 1;
			break;
		case 'I':
			Type = 2;
			Value = SymbolTbl.Add( vname );
			break;
		case 'O':
			Type = 3;
			break;
		case 'N':
			Type = 4;
			Value = (int) (*vname - '0');
			break;
		case 'S':
			Type = 5;
			Value = StringTbl.Add( vname );
			break;
		case 'E':
			Type = 6;
			break;
	}

	Prev = NULL;
	Next = NULL;

// SEQ NUMBER ID
	ID = SeqNumber;
	SeqNumber++;
}




inline Token::~Token()
{
	;
}


Token *Token::Connect_Left_of( Token *Right )
{
Token *Left = Right->Prev;

	if( Right )
	{
		Prev = Left;
		Right->Prev = this;
		Next = Right;

		if( Left )
			Left->Next = this;

		return( this );
	}

	else
	{
		Next = NULL;
		return( NULL );
	}
}


Token *Token::Connect_Right_of( Token *Left )
{
Token *Right = Left->Next;

	if( Left )
	{
		Next = Right;
		Left->Next = this;
		Prev = Left;

		if( Right )
			Right->Prev = this;

		return( this );
	}

	else
	{
		Prev = NULL;
		return( NULL );
	}
}


Token *Token::Disconnect()
{
Token *Left  = Prev;
Token *Right = Next;

	if( Left )
		Left->Next = this->Next;

	if( Right )
		Right->Prev = this->Prev;

	this->Prev = NULL;
	this->Next = NULL;

	return( this );
}


void Token::AddToken( char *tname, char *vname, int linenum )
{
Token *tmp;
Token *ptr;

	tmp = new Token;

	tmp->LineNum = linenum;
	strcpy( tmp->Tname, tname );
	strcpy( tmp->Vname, vname );
	tmp->Value = -1;

	switch( *tname )
	{
		case 'K':
			tmp->Type = 1;
			break;
		case 'I':
			tmp->Type = 2;
			tmp->Value = (SymbolTbl.Add( vname ) + 9);
			break;
		case 'O':
			tmp->Type = 3;
			break;
		case 'N':
			tmp->Type = 4;
			tmp->Value = (int) (*vname - '0');
			break;
		case 'S':
			tmp->Type = 5;
			tmp->Value = StringTbl.Add( vname );
			break;
		case 'E':
			tmp->Type = 6;
			break;
	}

	ptr = this;

	while( ptr->Next )
		ptr = ptr->Next;

	tmp->Connect_Right_of( ptr );
}


void Token::Print( void )
{
Token *ptr;

cout << "\n   ID\tTname\t   TYPE   LINE-NUM\tMEM_LOC\t\tVname\n------------------------------------------------------------------";

	ptr = this; //Next;

	while( ptr )
	{
		cout 	<< "\n   "
			<< ptr->ID    << "\t"
			<< ptr->Tname << "\t   "
			<< ptr->Type << "\t     "
			<< ptr->LineNum << "\t\t    "
			<< ptr->Value << "\t\t  "
			<< ptr->Vname
			;

		ptr = ptr->Next;
	}

	cout << "\n";
}


/////////////////////////////////////////////////////////////////////////////


#endif // __TOKEN_CPP