ceph/src/boost/boost/spirit/home/x3/string/detail/no_case_string_parse.hpp

   1 /*=============================================================================
   2     Copyright (c) 2001-2014 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_X3_NO_CASE_STRING_PARSE_APR_18_2014_1125PM)
   8 #define BOOST_SPIRIT_X3_NO_CASE_STRING_PARSE_APR_18_2014_1125PM
   9
  10 #include <boost/spirit/home/x3/char/char.hpp>
  11 #include <boost/spirit/home/x3/support/traits/move_to.hpp>
  12
  13 namespace boost { namespace spirit { namespace x3 { namespace detail
  14 {
  15     template <typename Char, typename Encoding>
  16     struct no_case_string
  17     {
  18         typedef std::basic_string< Char >  string_type;
  19         typedef typename string_type::const_iterator const_iterator;
  20
  21         no_case_string(char_type const* str)
  22           : lower(str)
  23           , upper(str)
  24         {
  25             typename string_type::iterator loi = lower.begin();
  26             typename string_type::iterator upi = upper.begin();
  27
  28             typedef typename Encoding::char_type encoded_char_type;
  29             Encoding encoding;
  30             for (; loi != lower.end(); ++loi, ++upi)
  31             {
  32                 *loi = static_cast<char_type>(encoding.tolower(encoded_char_type(*loi)));
  33                 *upi = static_cast<char_type>(encoding.toupper(encoded_char_type(*upi)));
  34             }
  35         }
  36         string_type lower;
  37         string_type upper;
  38
  39     };
  40
  41     template <typename String, typename Iterator, typename Attribute>
  42     inline bool no_case_string_parse(
  43         String const& str
  44       , Iterator& first, Iterator const& last, Attribute& attr)
  45     {
  46         typename String::const_iterator uc_i = str.upper.begin();
  47         typename String::const_iterator uc_last = str.upper.end();
  48         typename String::const_iterator lc_i = str.lower.begin();
  49         Iterator i = first;
  50
  51         for (; uc_i != uc_last; ++uc_i, ++lc_i, ++i)
  52             if (i == last || ((*uc_i != *i) && (*lc_i != *i)))
  53                 return false;
  54         x3::traits::move_to(first, i, attr);
  55         first = i;
  56         return true;
  57     }
  58 }}}}
  59
  60 #endif