/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/

 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.

 * The Original Code is Rhino code, released
 * May 6, 1999.

 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation.  Portions created by Netscape are
 * Copyright (C) 1997-1999 Netscape Communications Corporation. All
 * Rights Reserved.

 * Contributor(s): 

 * Alternatively, the contents of this file may be used under the
 * terms of the GNU Public License (the "GPL"), in which case the
 * provisions of the GPL are applicable instead of those above.
 * If you wish to allow use of your version of this file only
 * under the terms of the GPL and not to allow others to use your
 * version of this file under the NPL, indicate your decision by
 * deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL.  If you do not delete
 * the provisions above, a recipient may use your version of this
 * file under either the NPL or the GPL.
 */

#ifndef _JS_LINE_BUFFER_H_
#define _JS_LINE_BUFFER_H_

#include <sys/types.h>
#include "js-types.h"
#include "js-zonenew.h"
#include "js-reader.h"

/* Classes */
class JSLineBuffer {
    protected:
	JSReader
		*in;
	int	lineno;
	int	offset;
	int	end;
	int	lastPos;
	int	prevStart;
	int	lineStart;
	int	stringStart;    
	jsBool_t
		hitEOF;

	jsChar_t
		*buffer;
	int	bufferLength;
#ifdef FASTER
	jsString_t	string;
	int		stringLength;
#endif

    protected:
	int	getOrigin();
	jsBool_t
		readIntoBuffer(jsChar_t *buffer, jsChar_t *oldbuffer,
			int origin);
	jsBool_t
		extend(JSContext *cx);

    public:
	JSLineBuffer(JSContext *cx, JSReader *in, int lineno);

	void	destroy(JSContext *cx);
	int	read(JSContext *cx);
	void	unread();
	int	peek(JSContext *cx);
	jsBool_t
		match(JSContext *cx, jsChar_t c);
	jsString_t
		getLine(JSContext *cx);
	int	getOffset();
	void	startString();
	jsString_t
		getString(JSContext *cx);
	jsBool_t
		fill(JSContext *cx);
	int	getLineno();
    	jsBool_t
		eof();
};

/* Inlines */
inline int
JSLineBuffer::getLineno()
{
    return lineno;
}
inline jsBool_t
JSLineBuffer::eof()
{
    return hitEOF;
}

#endif /* _JS_LINE_BUFFER_H_ */

