coder_pipe.h

A Library of Efficient Data Types and Algorithms,封装了常用的ADT及其相关算法的软件包

/*******************************************************************************
+
+  LEDA 4.5  
+
+
+  coder_pipe.h
+
+
+  Copyright (c) 1995-2004
+  by Algorithmic Solutions Software GmbH
+  All rights reserved.
+ 
*******************************************************************************/

// $Revision: 1.11 $  $Date: 2004/02/06 11:18:56 $

#ifndef _LEDA_CODER_PIPE_H
#define _LEDA_CODER_PIPE_H

#if !defined(LEDA_ROOT_INCL_ID)
#define LEDA_ROOT_INCL_ID 450354
#include <LEDA/PREAMBLE.h>
#endif

#include <LEDA/impl/coder_base.h>
#include <LEDA/impl/coder_strbuf_adapter.h>

LEDA_BEGIN_NAMESPACE

class __exportC coder_pipe : public coder_base {
public:
	typedef coder_base base;
	enum { ID = 0x434c0b };

public:
	coder_pipe(unsigned num_coders = 1);
	~coder_pipe();

	virtual void reset(); // same state as the default ctor, but keeps all coders
	virtual string get_description() const;
	virtual bool is_single_pass_encoder() const;
	virtual bool is_standalone_coder() const { return false; }

protected:
	coder_base* get_coder(unsigned coder_idx) const;
	void        set_coder(unsigned coder_idx, coder_base* coder, bool own_coder = false);

protected:
	virtual const char* get_class_name() const { return "coder_pipe"; }
	virtual id_type get_id() const { return ID; } 

	virtual void write_id_to_tgt_stream();
	virtual void read_and_check_id_in_src_stream();
	virtual void finish_construction_from_stream(id_type id_in_stream, streambuf* stream);

	virtual void init_encoding();
	virtual void encode_stream();
	virtual void encoding_finished(); 

	virtual void init_decoding();
	virtual void decode_stream();
	virtual void decoding_finished(); 

private:
	coder_base* get_coder1() const { return pCoder1; }
	void        set_coder1(coder_base* c1, bool own_coder = false);

private:
	unsigned              NumberOfCoders;
	coder_base*			  pCoder1;
	coder_strbuf_adapter* AdaptersForCoders;
	bool                  OwnCoder1;
};

#if LEDA_ROOT_INCL_ID == 450354
#undef LEDA_ROOT_INCL_ID
#include <LEDA/POSTAMBLE.h>
#endif

LEDA_END_NAMESPACE

#endif