#include <memory.h>

#ifndef VERTEX_CACHE_H

#define VERTEX_CACHE_H

class VertexCache
{

public:

	VertexCache(int size)
	{
		numEntries = size;
		
		entries = new int[numEntries];
		
		for(int i = 0; i < numEntries; i++)
			entries[i] = -1;
	}
		
	VertexCache() { VertexCache(16); }
	~VertexCache() { delete[] entries; entries = 0; }
	
	bool InCache(int entry)
	{
		bool returnVal = false;
  for(int i = 0; i < numEntries; i++)
  {
    if(entries[i] == entry)
    {
      returnVal = true;
      break;
    }
  }

  return returnVal;
}

	int AddEntry(int entry)
{
  int removed;

  removed = entries[numEntries - 1];

  //push everything right one
  for(int i = numEntries - 2; i >= 0; i--)
  {
    entries[i + 1] = entries[i];
  }

  entries[0] = entry;

  return removed;
}

	void Clear()
	{
		memset(entries, -1, sizeof(int) * numEntries);
	}
	
	void Copy(VertexCache* inVcache) 
	{
		for(int i = 0; i < numEntries; i++)
		{
			inVcache->Set(i, entries[i]);
		}
	}

	int At(int index) { return entries[index]; }
	void Set(int index, int value) { entries[index] = value; }

private:

  int *entries;
  int numEntries;

};

#endif