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//
// Copyright (c) 2019-2024 Ruben Perez Hidalgo (rubenperez038 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)
//
#ifndef BOOST_MYSQL_IMPL_INTERNAL_PROTOCOL_IMPL_BIT_DESERIALIZATION_HPP
#define BOOST_MYSQL_IMPL_INTERNAL_PROTOCOL_IMPL_BIT_DESERIALIZATION_HPP
#include <boost/mysql/field_view.hpp>
#include <boost/mysql/string_view.hpp>
#include <boost/mysql/impl/internal/protocol/impl/deserialization_context.hpp>
#include <boost/endian/conversion.hpp>
#include <cstring>
namespace boost {
namespace mysql {
namespace detail {
// All BIT values come as binary values between 1 and 8 bytes length packed in string_lenenc's,
// for both the text and the binary protocols. As the text protocol already unpacks the
// string_lenenc layer, this function is in charge of just parsing the binary payload. The length of
// the BIT value depends on how the type was defined in the table (e.g. BIT(14) will send a 2 byte
// value; BIT(54) will send a 7 byte one). Values are sent as big-endian.
inline deserialize_errc deserialize_bit(string_view from, field_view& to)
{
std::size_t num_bytes = from.size();
if (num_bytes < 1 || num_bytes > 8)
{
return deserialize_errc::protocol_value_error;
}
unsigned char temp[8]{};
unsigned char* dest = temp + sizeof(temp) - num_bytes;
std::memcpy(dest, from.data(), num_bytes);
to = field_view(endian::load_big_u64(temp));
return deserialize_errc::ok;
}
} // namespace detail
} // namespace mysql
} // namespace boost
#endif
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