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/*
* Multicast Routing Daemon (MRD)
* parser.h
*
* Copyright (C) 2004, 2005
* Universidade de Aveiro, Instituto Telecomunicacoes - Polo Aveiro
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors: Hugo Santos, <hsantos@av.it.pt>
*/
#ifndef _mrd_parser_h_
#define _mrd_parser_h_
#include <sys/types.h>
#include <map>
#include <vector>
#include <list>
#include <string>
class parser_context {
public:
parser_context();
parser_context(const char *input, bool partial = false);
parser_context(const parser_context &);
parser_context &operator = (const parser_context &);
enum token_type {
NONE,
LCURLY, RCURLY,
LPARENT, RPARENT,
TERM,
EQUAL,
PLUSEQUAL,
DOT, COMMA,
/* identifier, integer, address, etc. */
TOKEN,
/* TOKEN directly followed by a '?' */
PARTIAL_TOKEN,
/* quoted string */
STRING,
};
static const char *token_name(token_type);
struct symbol {
symbol();
symbol(int, token_type, const std::string &);
symbol(const symbol &);
int line;
token_type sym;
std::string value;
};
int current_line_number() const { return m_current_line; }
std::string current_line() const;
const char *current_input() const { return m_input_pointer; }
int current_column() const { return m_input_pointer - m_input_line_start; }
// -1 parsing error
// 0 no more symbols
// 1 parsed with success
int read();
int eat();
int eat(token_type);
int eat(int, ...);
const symbol &head() const { return m_current; }
private:
int read_token(bool, int *, const char ** = 0, bool = true);
int parse_one(const char *input, int state, int *sym, int *readnum) const;
symbol m_current;
int m_current_line;
std::list<symbol> m_symq;
const char *m_input;
const char *m_input_pointer;
const char *m_input_line_start;
bool m_partial;
};
#endif
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