/***************************************************************************
                          regex_mod.cpp  -  description
                             -------------------
    begin                : Wed Sep 14 13:03:46 2005
    copyright            : (C) 2002 by Cavalli Andrea
    email                : cavalli@bioc.unizh.ch
**************************************************************************/
/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#include <zeta/module.h>
#include <zeta/class.h>
#include <zeta/zextclass.h>
#include <zeta/zobj.hpp>
#include <boost/regex.hpp>

//using namespace Almost;

template<>
inline string to_string(const boost::regex & exp){
  return exp.str();
}


boost::regex build(string r){ return boost::regex(r.c_str());}

string regex_replace(const string & in, const  boost::regex & re,
		     const string & frm){
  return boost::regex_replace(in,re,frm);
}


bool regex_contains(const string & in, const  boost::regex & re){
  return boost::regex_search(in,re);
}


vector<string> regex_split(const string & in, const  boost::regex & re){
  vector<string> res;
  boost::sregex_token_iterator i(in.begin(), in.end(), re, -1);
  boost::sregex_token_iterator j;
  while(i!=j){
    res.push_back(*i);
    ++i;
  }
  return res;
}

extern "C" {
  void init_regex(){
    //declarations here

    Module mod = Module("regex","Regular Expression Engine");

    mod.def_function("regex","Regular expression constructor",build);
    mod.def_function("regex_replace","Replaces matches according to format string",regex_replace);
    mod.def_function("regex_contains","Return true if the string contains a sub-string that matches the regular expression",regex_contains);

    mod.def_function("regex_split","Splits the the input string according to the given regular expression",regex_split);
  }
}