#ifndef _lucene_util_Reader_
#define _lucene_util_Reader_

#include "CLucene/StdHeader.h"
#include "CLucene/store/FSDirectory.h"

namespace lucene{namespace util{
	class Reader{
	public:
		virtual void close()=0;
		virtual int_t read(char_t* b, const int_t start, const int_t length)=0;
		virtual int_t read ( char_t buf[] ) = 0;
		virtual int_t available () = 0;
		virtual uchar_t readChar() = 0;
		virtual uchar_t peek() = 0;
		virtual int_t position() = 0;
		virtual void seek(int_t position) = 0;
		virtual ~Reader(){
		}
	};

	class StringReader:public Reader{
	private:
		const char_t* data;
		int_t pt;
		int_t len;
		bool delVal;
	public:
		StringReader ( const char_t* value );
		StringReader ( const char_t* value, const int length, const bool deletevalue=false );
		~StringReader();
		
		int_t read ( char_t* buf );
		int_t read ( char_t* buf, const int_t start, const int_t length );
		int_t available ();
		void close();
		uchar_t readChar();
		uchar_t peek();
		int_t position();
		void seek(int_t position);
	};

    #define FILEREADER_CACHE 64
	class FileReader:public Reader{
	private:
		lucene::store::FSInputStream* stream;
		char_t cache[FILEREADER_CACHE];
		const char_t *cachepos;
	public:
		
		FileReader ( const char_t* fname );
		~FileReader();
		
		int_t read ( char_t* buf );
		int_t read ( char_t* buf, const int_t start, const int_t length );
		int_t available ();
		uchar_t readChar();
		uchar_t peek();
		void close();
		int_t position();
		void seek(int_t position);
	};
}}
#endif