libbase/StringPredicates.h

   1 //
   2 //   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010,
   3 //   2011 Free Software Foundation, Inc
   4 //
   5 // This program is free software; you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation; either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  18 //
  19
  20
  21 #ifndef GNASH_STRINGPREDICATES_H
  22 #define GNASH_STRINGPREDICATES_H
  23
  24 #include <string>
  25 #include <algorithm>
  26 #include <boost/algorithm/string/compare.hpp>
  27 #include <boost/algorithm/string/predicate.hpp>
  28
  29 namespace gnash {
  30
  31 /// A case-insensitive string comparator
  32 class StringNoCaseLessThan {
  33 public:
  34         bool operator() (const std::string& a, const std::string& b) const
  35         {
  36                 return std::lexicographical_compare(a.begin(), a.end(),
  37                                                     b.begin(), b.end(),
  38                                                     nocase_less());
  39         }
  40 private:
  41
  42         class nocase_less
  43         {
  44         public:
  45                 nocase_less(const std::locale& locale = std::locale())
  46                         : _locale(locale)
  47                 {}
  48
  49                 bool operator() (const char& a, const char& b) const
  50                 {
  51                         return std::toupper<char>(a, _locale) <
  52                                std::toupper<char>(b, _locale);
  53                 }
  54         private:
  55                 const std::locale& _locale;
  56         };
  57 };
  58
  59
  60 /// A case-insensitive string equality operator
  61 class StringNoCaseEqual {
  62 public:
  63
  64     typedef bool result_type;
  65
  66         bool operator() (const std::string& a, const std::string& b) const
  67         {
  68                 return boost::iequals(a, b);
  69         }
  70 };
  71
  72 } // namespace gnash
  73
  74 #endif // GNASH_STRINGPREDICATES_H
  75
  76 // Local Variables:
  77 // mode: C++
  78 // indent-tabs-mode: t
  79 // End: