text: /*
   Copyright (c) 2014 Glen Joseph Fernandes
   glenfe at live dot com
  
   Distributed under the Boost Software License,
   Version 1.0. (See accompanying file LICENSE_1_0.txt
   or copy at http://boost.org/LICENSE_1_0.txt)
  */
  #ifndef BOOST_ALIGN_DETAIL_ALIGN_HPP
  #define BOOST_ALIGN_DETAIL_ALIGN_HPP
  
  #include <boost/assert.hpp>
  #include <boost/align/detail/address.hpp>
  #include <boost/align/detail/is_alignment.hpp>
  #include <cstddef>
  
  namespace boost {
      namespace alignment {
          inline void* align(std::size_t alignment, std::size_t size,
              void*& ptr, std::size_t& space)
          {
              BOOST_ASSERT(detail::is_alignment(alignment));
              std::size_t n = detail::address_t(ptr) & (alignment - 1);
              if (n != 0) {
                  n = alignment - n;
              }
              void* p = 0;
              if (n <= space && size <= space - n) {
                  p = static_cast<char*>(ptr) + n;
                  ptr = p;
                  space -= n;
              }
              return p;
          }
      }
  }
  
  #endif
  