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// -*- mode: c++; c-basic-offset:4 -*-
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
// Copyright (c) 2002,2003 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
// (c) COPYRIGHT URI/MIT 1994-1999
// Please read the full copyright statement in the file COPYRIGHT_URI.
//
// Authors:
// jhrg,jimg James Gallagher <jgallagher@gso.uri.edu>
// Constants, types and function prototypes for use with the DAP parsers.
//
// jhrg 2/3/96
#ifndef _parser_h
#define _parser_h
#ifndef _error_h
#include "Error.h"
#endif
#define YYDEBUG 1
#undef YYERROR_VERBOSE
#define YY_NO_UNPUT 1
#define ID_MAX 256
#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif
namespace libdap {
/** <tt>parser_arg</tt> is used to pass parameters to the bison parsers and get
error codes and objects in return. If <tt>status()</tt> is true, then the
<tt>object()</tt> returns a pointer to the object built during the parse
process. If <tt>status()</tt> is false, then the <tt>error()</tt>
returns a pointer to an Error object.
Note that the <tt>object()</tt> mfunc returns a void pointer.
@brief Pass parameters by reference to a parser.
@brief Pass parameters by reference to a parser.
*/
struct parser_arg {
void *_object; // nominally a pointer to an object
Error *_error; // a pointer to an Error object
int _status; // parser status
parser_arg() : _object(0), _error(0), _status(1) {}
parser_arg(void *obj) : _object(obj), _error(0), _status(1) {}
virtual ~parser_arg() {
if (_error) {
delete _error;
_error = 0;
}
}
void *object() { return _object; }
void set_object(void *obj) { _object = obj; }
Error *error() { return _error; }
void set_error(Error *obj) { _error = obj; }
int status() { return _status; }
void set_status(int val = 0) { _status = val; }
};
/** <tt>parser_error()</tt> generates error messages for the various
parsers used by libdap. There are two versions of the
function, one which takes a <tt>const char *message</tt> and a
<tt>const int line_num</tt> and writes the message and line number
too stderr and a second which takes an additional <tt>parser_arg
*arg</tt> parameter and writes the error message into an Error
object which is returned to the caller via the <tt>arg</tt>
parameter.
\note{The second version of this function also accepts a third parameter
(<tt>const char *context</tt>) which can be used to provide an
additional line of information beyond what is in the string
<tt>message</tt>.}
@name parse_error
@return void
@brief Generate error messages for the various parsers.
*/
//@{
void parse_error(parser_arg *arg, const char *s, const int line_num = 0, const char *context = 0);
void parse_error(const string &msg, const int line_num, const char *context = 0);
//@}
} // namespace libdap
#include "parser-util.h"
#endif // _parser_h
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