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#ifndef CharCache_H
#define CharCache_H
// CharCache is a counterpart of IntCache that is
// optimized for use in compressing text composed
// of 8-bit characters. (There used to be an
// abstract class Cache from which CharCache and
// IntCache were derived. This has been eliminated,
// however, since the use of virtual functions
// increased the size of each CharCache by 50%
// (not a good thing when TextCompressor has an
// array of several thousand CharCaches :-)
class CharCache
{
public:
CharCache():length_(0)
{
}
~CharCache()
{
}
unsigned int getSize() const
{
return (unsigned int) length_;
}
int lookup(unsigned char value, unsigned int &index);
unsigned int get(unsigned int i);
void insert(unsigned char value);
private:
unsigned char length_;
unsigned char buffer_[7]; // limit to 7 chars so object will fit in 8 bytes
};
#endif /* CharCache_H */
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