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/*ident	"@(#)ctrans:incl/strstream.h	1.1.1.1" */
/**************************************************************************
                        Copyright (c) 1984 AT&T
                          All Rights Reserved   

        THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T
      
        The copyright notice above does not evidence any        
        actual or intended publication of such source code.

*****************************************************************************/
#ifndef STRSTREAMH
#define STRSTREAMH

#include <iostream.h>
class strstreambuf : public streambuf
{
public: 
			strstreambuf() ;
			strstreambuf(int) ;
			strstreambuf(void* (*a)(long), void (*f)(void*)) ;
			strstreambuf(char* b, int size, char* pstart = 0 ) ;
			strstreambuf(unsigned char* b, int size, unsigned char* pstart = 0 ) ;
	void		freeze(int n=1) ;
	char*		str() ;
			~strstreambuf() ;

public: /* virtuals  */
	virtual int	doallocate() ;
	virtual int	overflow(int) ;
	virtual int	underflow() ;
	virtual streambuf*
			setbuf(char*  p, int l) ;
	virtual streampos
			seekoff(streamoff,seek_dir,int) ;

private:
	void		init(char*,int,char*) ;

	void*		(*afct)(long) ;
	void		(*ffct)(void*) ;
	int		ignore_oflow ;
	int		froozen ;
	int		auto_extend ;

public:
	} ;

class strstreambase : public virtual ios {
public:
	strstreambuf*	rdbuf() ;
protected:	
			strstreambase(char*, int, char*) ;
			strstreambase() ;
			~strstreambase() ;
private:
	strstreambuf	buf ; 
	} ;

class istrstream : public strstreambase, public istream {
public:
			istrstream(char* str);
			istrstream(char* str, int size ) ;
			~istrstream() ;
	} ;

class ostrstream : public strstreambase, public ostream {
public:
			ostrstream(char* str, int size, int=ios::out) ;
			ostrstream() ;
			~ostrstream() ;
	char*		str() ;
	int		pcount() ;
	} ;


class strstream : public strstreambase, public iostream {
public:
			strstream() ;
			strstream(char* str, int size, int mode) ;
			~strstream() ;
	char*		str() ;
	} ;

#endif

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