re.h
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 /*
  * $Id$
  *
  * regexp and regexp substitutions implementations
  * 
  * Copyright (C) 2001-2003 Fhg Fokus
  *
  * This file is part of ser, a free SIP server.
  *
  * ser 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
  *
  * For a license to use the ser software under conditions
  * other than those described here, or to purchase support for this
  * software, please contact iptel.org by e-mail at the following addresses:
  *    info@iptel.org
  *
  * ser 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
  *
  *
  * History:
  * --------
  *   2003-08-04  created by andrei
  */
 
 #ifndef _re_h
 #define _re_h
 
 #include "str.h"
 #include "parser/msg_parser.h"
 #include <sys/types.h> /* for regex */
 #include <regex.h>
 
 enum replace_special { REPLACE_NMATCH, REPLACE_CHAR, REPLACE_URI };
 
 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;
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 	}u;
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 };
 
 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);
 struct subst_expr*  subst_parser(str* subst);
 struct replace_lst* subst_run( struct subst_expr* se, char* input, 
 		                       struct sip_msg* msg);
 str* subst_str(char* input, struct sip_msg* msg, struct subst_expr* se);
 
 
 
 #endif