RegExp.h++

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/* ---------------------------------------------------------------------------
   commonc++ - A C++ Common Class Library
   Copyright (C) 2005-2012  Mark A Lindner

   This file is part of commonc++.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   ---------------------------------------------------------------------------
*/

#ifndef __ccxx_RegExp_hxx
#define __ccxx_RegExp_hxx

#include <commonc++/Common.h++>
#include <commonc++/ParseException.h++>
#include <commonc++/String.h++>

#include <sys/types.h>

namespace ccxx {

class COMMONCPP_API RegExpMatch
{
  friend class RegExp;

  public:

  RegExpMatch()
    : rm_so(-1), rm_eo(-1)
  { }

  inline bool isValid() const throw()
  { return(rm_so >= 0); }

  inline uint_t getStartIndex() const throw()
  { return(rm_so >= 0 ? rm_so : 0); }

  inline uint_t getEndIndex() const throw()
  { return((rm_eo >= 0) && (rm_so >= 0) ? rm_eo : 0); }

  private:

  int rm_so;
  int rm_eo;
};

class COMMONCPP_API RegExp
{
  public:

  RegExp() throw();

  RegExp(const RegExp& other) throw(ParseException);

  ~RegExp() throw();

  void setPattern(const char *pattern, bool caseInsensitive = false)
    throw(ParseException);

  void setPattern(const String &pattern, bool caseInsensitive = false)
    throw(ParseException);

  inline String getPattern() const
  { return(_pattern); }

  inline String toString() const
  { return(getPattern()); }

  bool match(const char *text) const throw();

  bool match(const String &text) const throw();

  bool match(const char *text, RegExpMatch matches[], int numMatches) const
    throw();

  bool match(const String &text, RegExpMatch matches[], int numMatches)
    const throw();

  RegExp& operator=(const RegExp &other);

  inline bool isNull() const throw()
  { return(_pattern.isNull()); }

  inline bool operator!() const throw()
  { return(_pattern.isNull()); }

  static String escapeMeta(const String &text);

  private:

  String _pattern;
  struct
  {
    void *re_pcre;
    size_t re_nsub;
    size_t re_erroffset;
  } _regex;
  bool _compiled;
};

}; // namespace ccxx

#endif // __ccxx_RegExp_hxx

/* end of header file */