102 lines
3.5 KiB
C++
102 lines
3.5 KiB
C++
// Copyright (c) 2023, 2024, Oracle and/or its affiliates.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License, version 2.0,
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// as published by the Free Software Foundation.
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//
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// This program is designed to work with certain software (including
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// but not limited to OpenSSL) that is licensed under separate terms,
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// as designated in a particular file or component or in included license
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// documentation. The authors of MySQL hereby grant you an additional
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// permission to link the program and your derivative works with the
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// separately licensed software that they have either included with
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// the program or referenced in the documentation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License, version 2.0, for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef MYSQL_SERIALIZATION_READ_ARCHIVE_BINARY_H
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#define MYSQL_SERIALIZATION_READ_ARCHIVE_BINARY_H
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#include <sstream>
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#include "mysql/serialization/archive.h"
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#include "mysql/serialization/archive_binary_field_max_size_calculator.h"
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#include "mysql/serialization/primitive_type_codec.h"
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#include "mysql/serialization/serialization_types.h"
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/// @file
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/// Experimental API header
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/// @addtogroup GroupLibsMysqlSerialization
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/// @{
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namespace mysql::serialization {
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/// @brief Binary, read only archive implementation based on vector of bytes
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class Read_archive_binary : public Archive<Read_archive_binary> {
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public:
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using Internal_type = const unsigned char *;
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/// @copydoc Archive::operator>>
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template <typename Field_type>
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Read_archive_binary &operator>>(Field_type &&arg);
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/// @copydoc Archive::get_size
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template <typename Field_type>
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static std::size_t get_size(Field_type &&arg) {
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static constexpr auto value_size = Field_type::value_size;
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using value_type = typename std::decay_t<Field_type>::value_type;
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return Primitive_type_codec<value_type>::template count_write_bytes<
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value_size>(arg.get());
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}
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/// @copydoc Archive::get_max_size
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template <typename T, Field_size S>
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static constexpr std::size_t get_max_size() {
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return Archive_binary_field_max_size_calculator<T, S>::get_max_size();
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}
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/// @brief Set up internal stream, this implementation of Archive does not
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/// own memory, it just reads it
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/// @param[in] stream Captured stream
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/// @param[in] stream_size Size of stream
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void set_stream(const unsigned char *stream, std::size_t stream_size) {
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m_stream = stream;
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m_stream_size = stream_size;
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}
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// internal
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/// @copydoc Archive::get_raw_data
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Internal_type &get_raw_data();
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/// @copydoc Archive::peek
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template <class Field_type>
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void peek(Field_type &&field);
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/// @copydoc Archive::seek_to
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void seek_to(std::size_t num_pos) { read_pos += num_pos; }
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/// @copydoc Archive::get_read_pos
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inline std::size_t get_read_pos() const { return read_pos; }
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private:
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const unsigned char *m_stream; ///< Internal data stream
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std::size_t read_pos{0}; ///< Read position
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std::size_t m_stream_size{0}; /// length of m_stream
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};
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} // namespace mysql::serialization
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/// @}
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#include "mysql/serialization/read_archive_binary_impl.hpp"
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#endif // MYSQL_SERIALIZATION_READ_ARCHIVE_BINARY_H
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