//allkeys.cpp
//chris busch

#include "allkeys.hpp"
#include <stdio.h> //for puts
#include <assert.h>
#include <string.h>

akeynode* allkeys::addkey()
{
	akeynode* newone;
	if((newone=new akeynode)==NULL)
	{
		#ifdef CHECKMEM
			puts("out of mem in allkeys::addkey()");
		#endif
		return NULL;
	}
	if(top!=NULL) top->next=newone;
	current=top=newone;
	top->next=NULL;
	if(numkeys==0) first=top;
	numkeys++;
	return current;
}

akeynode* allkeys::reset()
{
	return (current=first);
}

akeynode* allkeys::advance()
{
	if(current!=NULL)
	{
		current=current->next;
	}
	else
	{
		#ifdef DEBUG
			puts("advanced beyond allkeys list");
		#endif
	}
	return current;
}

allkeys::~allkeys()
{
	if(first!=NULL)
	{
		reset();
		do{
			delete current;
		}while(advance()!=NULL);
	}
}