mysql/impl/field_view.ipp

0001 //
0002 // Copyright (c) 2019-2023 Ruben Perez Hidalgo (rubenperez038 at gmail dot com)
0003 //
0004 // Distributed under the Boost Software License, Version 1.0. (See accompanying
0005 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007
0008 #ifndef BOOST_MYSQL_IMPL_FIELD_VIEW_IPP
0009 #define BOOST_MYSQL_IMPL_FIELD_VIEW_IPP
0010
0011 #pragma once
0012
0013 #include <boost/mysql/field_view.hpp>
0014
0015 #include <boost/mysql/detail/config.hpp>
0016
0017 #include <ostream>
0018
0019 namespace boost {
0020 namespace mysql {
0021 namespace detail {
0022
0023 BOOST_MYSQL_STATIC_OR_INLINE
0024 std::ostream& print_blob(std::ostream& os, blob_view value)
0025 {
0026     if (value.empty())
0027         return os << "{}";
0028
0029     char buffer[16]{};
0030
0031     os << "{ ";
0032     for (std::size_t i = 0; i < value.size(); ++i)
0033     {
0034         if (i != 0)
0035             os << ", ";
0036         unsigned byte = value[i];
0037         std::snprintf(buffer, sizeof(buffer), "0x%02x", byte);
0038         os << buffer;
0039     }
0040     os << " }";
0041     return os;
0042 }
0043
0044 BOOST_MYSQL_STATIC_OR_INLINE
0045 std::ostream& print_time(std::ostream& os, const boost::mysql::time& value)
0046 {
0047     // Worst-case output is 26 chars, extra space just in case
0048     char buffer[64]{};
0049
0050     using namespace std::chrono;
0051     const char* sign = value < microseconds(0) ? "-" : "";
0052     auto num_micros = value % seconds(1);
0053     auto num_secs = duration_cast<seconds>(value % minutes(1) - num_micros);
0054     auto num_mins = duration_cast<minutes>(value % hours(1) - num_secs);
0055     auto num_hours = duration_cast<hours>(value - num_mins);
0056
0057     snprintf(
0058         buffer,
0059         sizeof(buffer),
0060         "%s%02d:%02u:%02u.%06u",
0061         sign,
0062         static_cast<int>(std::abs(num_hours.count())),
0063         static_cast<unsigned>(std::abs(num_mins.count())),
0064         static_cast<unsigned>(std::abs(num_secs.count())),
0065         static_cast<unsigned>(std::abs(num_micros.count()))
0066     );
0067
0068     os << buffer;
0069     return os;
0070 }
0071
0072 }  // namespace detail
0073 }  // namespace mysql
0074 }  // namespace boost
0075
0076 std::ostream& boost::mysql::operator<<(std::ostream& os, const field_view& value)
0077 {
0078     // Make operator<< work for detail::string_view_offset types
0079     if (value.impl_.is_string_offset() || value.impl_.is_blob_offset())
0080     {
0081         return os << "<sv_offset>";
0082     }
0083
0084     switch (value.kind())
0085     {
0086     case field_kind::null: return os << "<NULL>";
0087     case field_kind::int64: return os << value.get_int64();
0088     case field_kind::uint64: return os << value.get_uint64();
0089     case field_kind::string: return os << value.get_string();
0090     case field_kind::blob: return detail::print_blob(os, value.get_blob());
0091     case field_kind::float_: return os << value.get_float();
0092     case field_kind::double_: return os << value.get_double();
0093     case field_kind::date: return os << value.get_date();
0094     case field_kind::datetime: return os << value.get_datetime();
0095     case field_kind::time: return detail::print_time(os, value.get_time());
0096     default: BOOST_ASSERT(false); return os;
0097     }
0098 }
0099
0100 #endif