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// -*- C++ -*- $Id$
#ifndef _ACEXML_CHARSTREAM_H_
#define _ACEXML_CHARSTREAM_H_
#include "Common/XML_Types.h"
class ACEXML_Export ACEXML_CharStream
{
// ACEXML_InputStream defines the basic opertion the parser
// could use to retrieve XML charater sequence. The sequence
// can be read from a file or a character buffer.
public:
/**
* Virtual destructor, must have.
*/
virtual ~ACEXML_CharStream () = 0;
/**
* Returns the available ACEXML_Char in the buffer. -1
* if the object is not initialized properly.
*/
virtual int available (void) = 0;
/**
* Close this stream and release all resources used by it.
*/
virtual int close (void) = 0;
/**
* Read the next ACEXML_Char. Return -1 if we are not able to
* return an ACEXML_Char, 0 if EOS is reached, or 1 if succeed.
*/
virtual int get (ACEXML_Char& ch) = 0;
/**
* Read the next batch of ACEXML_Char strings
*/
virtual int read (ACEXML_Char *str,
size_t len) = 0;
/**
* Peek the next ACEXML_Char in the CharStream. Return the
* character if succeess, -1 if EOS is reached.
*/
virtual int peek (void) = 0;
};
#endif /* _ACEXML_CHARSTREAM_H_ */
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