Line data    Source code

       1              : // Copyright 2018 Ulf Adams
       2              : //
       3              : // The contents of this file may be used under the terms of the Apache License,
       4              : // Version 2.0.
       5              : //
       6              : //    (See accompanying file LICENSE-Apache or copy at
       7              : //     http://www.apache.org/licenses/LICENSE-2.0)
       8              : //
       9              : // Alternatively, the contents of this file may be used under the terms of
      10              : // the Boost Software License, Version 1.0.
      11              : //    (See accompanying file LICENSE-Boost or copy at
      12              : //     https://www.boost.org/LICENSE_1_0.txt)
      13              : //
      14              : // Unless required by applicable law or agreed to in writing, this software
      15              : // is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
      16              : // KIND, either express or implied.
      17              : 
      18              : /*
      19              :     This is a derivative work
      20              : */
      21              : 
      22              : #ifndef BOOST_JSON_DETAIL_RYU_DETAIL_DIGIT_TABLE_HPP
      23              : #define BOOST_JSON_DETAIL_RYU_DETAIL_DIGIT_TABLE_HPP
      24              : 
      25              : #include <boost/json/detail/config.hpp>
      26              : 
      27              : namespace boost {
      28              : namespace json {
      29              : namespace detail {
      30              : 
      31              : namespace ryu {
      32              : namespace detail {
      33              : 
      34              : // A table of all two-digit numbers. This is used to speed up decimal digit
      35              : // generation by copying pairs of digits into the final output.
      36              : inline
      37              : char const
      38          842 : (&DIGIT_TABLE() noexcept)[200]
      39              : {
      40              :     static constexpr char arr[200] = {
      41              :       '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9',
      42              :       '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9',
      43              :       '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9',
      44              :       '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9',
      45              :       '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9',
      46              :       '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9',
      47              :       '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9',
      48              :       '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9',
      49              :       '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9',
      50              :       '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9' };
      51          842 :     return arr;
      52              : }
      53              : 
      54              : } // detail
      55              : } // ryu
      56              : 
      57              : } // detail
      58              : } // namespace json
      59              : } // namespace boost
      60              : 
      61              : #endif