ceph/src/boost/libs/spirit/include/boost/spirit/home/support/utf8.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2011 Joel de Guzman
   3
   4     Distributed under the Boost Software License, Version 1.0. (See accompanying
   5     file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 ==============================================================================*/
   7 #if !defined(BOOST_SPIRIT_UC_TYPES_NOVEMBER_23_2008_0840PM)
   8 #define BOOST_SPIRIT_UC_TYPES_NOVEMBER_23_2008_0840PM
   9
  10 #if defined(_MSC_VER)
  11 #pragma once
  12 #endif
  13
  14 #include <boost/cstdint.hpp>
  15 #include <boost/foreach.hpp>
  16 #include <boost/regex/pending/unicode_iterator.hpp>
  17 #include <boost/type_traits/make_unsigned.hpp>
  18 #include <string>
  19
  20 namespace boost { namespace spirit
  21 {
  22     typedef ::boost::uint32_t ucs4_char;
  23     typedef char utf8_char;
  24     typedef std::basic_string<ucs4_char> ucs4_string;
  25     typedef std::basic_string<utf8_char> utf8_string;
  26
  27     template <typename Char>
  28     inline utf8_string to_utf8(Char value)
  29     {
  30         // always store as UTF8
  31         utf8_string result;
  32         typedef std::back_insert_iterator<utf8_string> insert_iter;
  33         insert_iter out_iter(result);
  34         utf8_output_iterator<insert_iter> utf8_iter(out_iter);
  35         typedef typename make_unsigned<Char>::type UChar;
  36         *utf8_iter = (UChar)value;
  37         return result;
  38     }
  39
  40     template <typename Char>
  41     inline utf8_string to_utf8(Char const* str)
  42     {
  43         // always store as UTF8
  44         utf8_string result;
  45         typedef std::back_insert_iterator<utf8_string> insert_iter;
  46         insert_iter out_iter(result);
  47         utf8_output_iterator<insert_iter> utf8_iter(out_iter);
  48         typedef typename make_unsigned<Char>::type UChar;
  49         while (*str)
  50             *utf8_iter++ = (UChar)*str++;
  51         return result;
  52     }
  53
  54     template <typename Char, typename Traits, typename Allocator>
  55     inline utf8_string
  56     to_utf8(std::basic_string<Char, Traits, Allocator> const& str)
  57     {
  58         // always store as UTF8
  59         utf8_string result;
  60         typedef std::back_insert_iterator<utf8_string> insert_iter;
  61         insert_iter out_iter(result);
  62         utf8_output_iterator<insert_iter> utf8_iter(out_iter);
  63         typedef typename make_unsigned<Char>::type UChar;
  64         BOOST_FOREACH(Char ch, str)
  65         {
  66             *utf8_iter++ = (UChar)ch;
  67         }
  68         return result;
  69     }
  70 }}
  71
  72 #endif