// HASHTBL.CPP

#ifndef __HASHTBL_CPP
#define __HASHTBL_CPP

#include "hashtbl.h"
#include <ctype.h>


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


HashTable::HashTable()
{
int i;
	for( i=0; i<27; i++ )
	{
		Table[ i ] = -1;
	}
}


inline HashTable::~HashTable()
{
	;
}



int HashTable::HashIt( char *ch )
{
int hash;

	hash = toupper( *ch ) - 'A' + 1;

	return( hash );

}


int HashTable::Add( char *Name )
{
// RETURN HASH VALUE

int i;
int hash;

	hash = HashIt( Name );

	if( Table[ hash ] == -1 )
	{
		i = (int) ( *Name -  'A' + 10 ); // i = Addr of Var
		Table[ hash ] = i;
	}

	return( hash );
}


int HashTable::Change( char *Name, int Value )
{
// RETURN 1 IF CHANGED 0 IF NOT

int hash;

	hash = HashIt( Name );

	if( Table[ hash ] != -1 )
	{
		Table[ hash ] = Value;
		return( 1 );
	}
	else
	{
		return( 0 );
	}
}


int HashTable::Delete( char *Name )
{
// RETURN 1 IF DELETED, 0 IF NOT

int hash;

	hash = HashIt( Name );

	if( Table[ hash ] != -1 )
	{
		Table[ hash ] = -1;
		return( 1 );
	}
	else
	{
		return( 0 );
	}
}


int HashTable::Get( char *Name )
{
// RETURN VALUE, -1 IF NOT FOUND

int hash;

	hash = HashIt( Name );

	return( Table[ hash ] );
}


void HashTable::Print( char *Name )
{

int hash;

	hash = HashIt( Name );

//	cout << "\nSEQ-ID\tTYPE\tINT_TYPE   LINE-NUM\tINT_VALUE\tSTR_VALUE\n------------------------------------------------------------------";

	cout << hash << "\n";
}



void HashTable::PrintAll( void )
{

	cout << "\n CHAR \t MEM-LOC  \n------------------------\n";

int i;

	for( i=1; i<27; i++ )
	{
		cout << "   "
		     << (char) (i-1+'A')
		     << "\t    " << Table[ i ]
		     << "\n"
		     ;
	}

	cout << "\n";
}


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

#endif // __HASHTBL_CPP