/*
  * regexp and regexp substitutions implementations
  * 

  * Copyright (C) 2001-2003 FhG Fokus

  *

  * This file is part of Kamailio, a free SIP server.

  *

  * Kamailio 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
  *

  * Kamailio 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

  *
  *

  */
 /*!
  * \file
  * \brief Kamailio core :: regexp and regexp substitutions implementations
  * \author andrei
  * \ingroup core
  * Module: \ref core

  */
 
 #ifndef _re_h
 #define _re_h
 
 #include "str.h"

 #include "pvar.h"

 #include "parser/msg_parser.h"
 #include <sys/types.h> /* for regex */
 #include <regex.h>
 

 #define WITH_SEP	1
 #define WITHOUT_SEP	0
 
 enum replace_special { REPLACE_NMATCH, REPLACE_CHAR, REPLACE_URI, 
 					   REPLACE_SPEC };

 
 struct replace_with{
 	int offset; /* offset in string */
 	int size;   /* size of replace "anchor" in string */
 	enum replace_special type;
 	union{
 		int nmatch;
 		char c;

 		pv_spec_t spec;

 	}u;

 };
 
 struct subst_expr{
 	regex_t* re;
 	str replacement;
 	int replace_all; 
 	int n_escapes; /* escapes number (replace[] size) */
 	int max_pmatch ; /* highest () referenced */
 	struct replace_with replace[1]; /* 0 does not work on all compilers */
 };
 
 struct replace_lst{
 	int offset;

 	int size;   /* at offset, delete size bytes and replace them with rpl */

 	str rpl;
 	struct replace_lst *next;
 };
 
 
 
 void subst_expr_free(struct subst_expr* se);
 void replace_lst_free(struct replace_lst* l);

 int parse_repl(struct replace_with * rw, char ** begin, 
 				char * end, int *max_token_nb, int flag);

 struct subst_expr*  subst_parser(str* subst);

 struct replace_lst* subst_run( struct subst_expr* se, const char* input, 

 		                       struct sip_msg* msg, int *count);
 str* subst_str(const char* input, struct sip_msg* msg,
 				struct subst_expr* se, int* count);

 
 
 
 #endif