VertexCache.h

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#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

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