ceph/src/boost/libs/property_tree/include/boost/property_tree/detail/ptree_utils.hpp

   1 // ----------------------------------------------------------------------------
   2 // Copyright (C) 2002-2006 Marcin Kalicinski
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 // For more information, see www.boost.org
   9 // ----------------------------------------------------------------------------
  10 #ifndef BOOST_PROPERTY_TREE_DETAIL_PTREE_UTILS_HPP_INCLUDED
  11 #define BOOST_PROPERTY_TREE_DETAIL_PTREE_UTILS_HPP_INCLUDED
  12
  13 #include <boost/limits.hpp>
  14 #include <boost/type_traits/integral_constant.hpp>
  15 #include <boost/mpl/has_xxx.hpp>
  16 #include <boost/mpl/and.hpp>
  17 #include <string>
  18 #include <algorithm>
  19 #include <locale>
  20
  21 namespace boost { namespace property_tree { namespace detail
  22 {
  23
  24     template<class T>
  25     struct less_nocase
  26     {
  27         typedef typename T::value_type Ch;
  28         std::locale m_locale;
  29         inline bool operator()(Ch c1, Ch c2) const
  30         {
  31             return std::toupper(c1, m_locale) < std::toupper(c2, m_locale);
  32         }
  33         inline bool operator()(const T &t1, const T &t2) const
  34         {
  35             return std::lexicographical_compare(t1.begin(), t1.end(),
  36                                                 t2.begin(), t2.end(), *this);
  37         }
  38     };
  39
  40     template <typename Ch>
  41     struct is_character : public boost::false_type {};
  42     template <>
  43     struct is_character<char> : public boost::true_type {};
  44     template <>
  45     struct is_character<wchar_t> : public boost::true_type {};
  46
  47
  48     BOOST_MPL_HAS_XXX_TRAIT_DEF(internal_type)
  49     BOOST_MPL_HAS_XXX_TRAIT_DEF(external_type)
  50     template <typename T>
  51     struct is_translator : public boost::mpl::and_<
  52         has_internal_type<T>, has_external_type<T> > {};
  53
  54
  55
  56     // Naively convert narrow string to another character type
  57     template<typename Str>
  58     Str widen(const char *text)
  59     {
  60         Str result;
  61         while (*text)
  62         {
  63             result += typename Str::value_type(*text);
  64             ++text;
  65         }
  66         return result;
  67     }
  68
  69     // Naively convert string to narrow character type
  70     template<typename Str, typename char_type>
  71     Str narrow(const char_type *text)
  72     {
  73         Str result;
  74         while (*text)
  75         {
  76             if (*text < 0 || *text > (std::numeric_limits<char>::max)())
  77                 result += '*';
  78             else
  79                 result += typename Str::value_type(*text);
  80             ++text;
  81         }
  82         return result;
  83     }
  84
  85     // Remove trailing and leading spaces
  86     template<class Str>
  87     Str trim(const Str &s, const std::locale &loc = std::locale())
  88     {
  89         typename Str::const_iterator first = s.begin();
  90         typename Str::const_iterator end = s.end();
  91         while (first != end && std::isspace(*first, loc))
  92             ++first;
  93         if (first == end)
  94             return Str();
  95         typename Str::const_iterator last = end;
  96         do --last; while (std::isspace(*last, loc));
  97         if (first != s.begin() || last + 1 != end)
  98             return Str(first, last + 1);
  99         else
 100             return s;
 101     }
 102
 103 } } }
 104
 105 #endif