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/*
This file is part of GNUnet
(C) 2012 Christian Grothoff (and other contributing authors)
GNUnet 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 3, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file include/gnunet_regex_lib.h
* @brief library to parse regular expressions into dfa
* @author Maximilian Szengel
*
*/
#ifndef GNUNET_REGEX_LIB_H
#define GNUNET_REGEX_LIB_H
#include "gnunet_util_lib.h"
#ifdef __cplusplus
extern "C"
{
#if 0 /* keep Emacsens' auto-indent happy */
}
#endif
#endif
/**
* Automaton (NFA/DFA) representation
*/
struct GNUNET_REGEX_Automaton;
/**
* Construct an NFA by parsing the regex string of length 'len'.
*
* @param regex regular expression string
* @param len length of the string
*
* @return NFA, needs to be freed using GNUNET_REGEX_destroy_automaton
*/
struct GNUNET_REGEX_Automaton *
GNUNET_REGEX_construct_nfa (const char *regex, const size_t len);
/**
* Construct DFA for the given 'regex' of length 'len'
*
* @param regex regular expression string
* @param len length of the regular expression
*
* @return DFA, needs to be freed using GNUNET_REGEX_destroy_automaton
*/
struct GNUNET_REGEX_Automaton *
GNUNET_REGEX_construct_dfa (const char *regex, const size_t len);
/**
* Free the memory allocated by constructing the GNUNET_REGEX_Automaton
* data structure.
*
* @param a automaton to be destroyed
*/
void
GNUNET_REGEX_automaton_destroy (struct GNUNET_REGEX_Automaton *a);
/**
* Save the given automaton as a GraphViz dot file
*
* @param a the automaton to be saved
* @param filename where to save the file
*/
void
GNUNET_REGEX_automaton_save_graph (struct GNUNET_REGEX_Automaton *a,
const char *filename);
/**
* Evaluates the given 'string' against the given compiled regex
*
* @param a automaton
* @param string string to check
*
* @return GNUNET_YES if 'a' matches 'string', GNUNET_NO otherwise
*/
int
GNUNET_REGEX_eval (struct GNUNET_REGEX_Automaton *a,
const char *string);
#if 0 /* keep Emacsens' auto-indent happy */
{
#endif
#ifdef __cplusplus
}
#endif
/* end of gnunet_regex_lib.h */
#endif
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