// // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com) // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // // Official repository: https://github.com/boostorg/beast // #ifndef BOOST_BEAST_DETAIL_STATIC_STRING_HPP #define BOOST_BEAST_DETAIL_STATIC_STRING_HPP #include <boost/assert.hpp> #include <boost/core/ignore_unused.hpp> #include <string> #include <type_traits> namespace boost { namespace beast { namespace detail { // Maximum number of characters in the decimal // representation of a binary number. This includes // the potential minus sign. // inline std::size_t constexpr max_digits(std::size_t bytes) { return static_cast<std::size_t>( bytes * 2.41) + 1 + 1; } template<class CharT, class Integer, class Traits> CharT* raw_to_string( CharT* buf, Integer x, std::true_type) { if(x == 0) { Traits::assign(*--buf, '0'); return buf; } if(x < 0) { x = -x; for(;x > 0; x /= 10) Traits::assign(*--buf , "0123456789"[x % 10]); Traits::assign(*--buf, '-'); return buf; } for(;x > 0; x /= 10) Traits::assign(*--buf , "0123456789"[x % 10]); return buf; } template<class CharT, class Integer, class Traits> CharT* raw_to_string( CharT* buf, Integer x, std::false_type) { if(x == 0) { *--buf = '0'; return buf; } for(;x > 0; x /= 10) Traits::assign(*--buf , "0123456789"[x % 10]); return buf; } template< class CharT, class Integer, class Traits = std::char_traits<CharT>> CharT* raw_to_string(CharT* last, std::size_t size, Integer i) { boost::ignore_unused(size); BOOST_ASSERT(size >= max_digits(sizeof(Integer))); return raw_to_string<CharT, Integer, Traits>( last, i, std::is_signed<Integer>{}); } } // detail } // beast } // boost #endif