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pp-string.h

/****************************************************************************
**
** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
** Copyright 2005 Roberto Raggi <roberto@kdevelop.org>
**
** This file is part of $PRODUCT$.
**
** $CPP_LICENSE$
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef PP_STRING_H
#define PP_STRING_H

namespace rpp {

template <typename _CharT>
class pp_string
{
  typedef std::char_traits<_CharT> traits_type;
  typedef std::size_t size_type;

  _CharT const *_M_begin;
  std::size_t _M_size;

public:
  inline pp_string ():
    _M_begin (0), _M_size(0) {}

  explicit pp_string (std::string const &__s):
    _M_begin (__s.c_str ()), _M_size (__s.size ()) {}

  inline pp_string (_CharT const *__begin, std::size_t __size):
    _M_begin (__begin), _M_size (__size) {}

  inline _CharT const *begin () const { return _M_begin; }
  inline _CharT const *end () const { return _M_begin + _M_size; }

  inline _CharT at (std::size_t index) const { return _M_begin [index]; }

  inline std::size_t size () const { return _M_size; }

  inline int compare (pp_string const &__other) const
  {
    size_type const __size = this->size();
    size_type const __osize = __other.size();
    size_type const __len = std::min (__size,  __osize);

    int __r = traits_type::compare (_M_begin, __other._M_begin, __len);
    if (!__r)
        __r =  (int) (__size - __osize);

    return __r;
  }

  inline bool operator == (pp_string const &__other) const
  { return compare (__other) == 0; }

  inline bool operator != (pp_string const &__other) const
  { return compare (__other) != 0; }

  inline bool operator < (pp_string const &__other) const
  { return compare (__other) < 0; }

  inline bool operator == (char const *s) const
  {
    std::size_t n = strlen (s);

    if (n != _M_size)
      return false;

    return ! strncmp (_M_begin, s, n);
  }

  inline bool operator != (char const *s) const
  { return ! operator == (s); }
};

} // namespace rpp

#endif // PP_STRING_H

// kate: space-indent on; indent-width 2; replace-tabs on;

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