re.h

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/*
 * $Id: re.h 4518 2008-07-28 15:39:28Z henningw $
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * History:
 * --------
 *   2003-08-04  created by andrei
 *   2004-11-12  minor api extension, added *count (andrei)
 */

/*!
 * \file
 * \brief regexp and regexp substitutions implementations
 */

#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

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