// Copyright (c) 2018-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/

#ifndef TAO_JSON_PEGTL_INTERNAL_PEEK_MASK_UINT_HPP
#define TAO_JSON_PEGTL_INTERNAL_PEEK_MASK_UINT_HPP

#include <cstddef>
#include <cstdint>

#include "../config.hpp"

#include "input_pair.hpp"
#include "read_uint.hpp"

namespace TAO_JSON_PEGTL_NAMESPACE::internal
{
   template< typename R, typename R::type M >
   struct peek_mask_uint_impl
   {
      using data_t = typename R::type;
      using pair_t = input_pair< data_t >;

      static constexpr std::size_t min_input_size = sizeof( data_t );
      static constexpr std::size_t max_input_size = sizeof( data_t );

      template< typename Input >
      [[nodiscard]] static pair_t peek( const Input& in, const std::size_t /*unused*/ ) noexcept
      {
         const data_t data = R::read( in.current() ) & M;
         return { data, sizeof( data_t ) };
      }
   };

   template< std::uint16_t M >
   using peek_mask_uint16_be = peek_mask_uint_impl< read_uint16_be, M >;

   template< std::uint16_t M >
   using peek_mask_uint16_le = peek_mask_uint_impl< read_uint16_le, M >;

   template< std::uint32_t M >
   using peek_mask_uint32_be = peek_mask_uint_impl< read_uint32_be, M >;

   template< std::uint32_t M >
   using peek_mask_uint32_le = peek_mask_uint_impl< read_uint32_le, M >;

   template< std::uint64_t M >
   using peek_mask_uint64_be = peek_mask_uint_impl< read_uint64_be, M >;

   template< std::uint64_t M >
   using peek_mask_uint64_le = peek_mask_uint_impl< read_uint64_le, M >;

}  // namespace TAO_JSON_PEGTL_NAMESPACE::internal

#endif