2 \brief Binary input and output archives */
4 Copyright (c) 2014, Randolph Voorhies, Shane Grant
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
9 * Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 * Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14 * Neither the name of cereal nor the
15 names of its contributors may be used to endorse or promote products
16 derived from this software without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
19 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 DISCLAIMED. IN NO EVENT SHALL RANDOLPH VOORHIES OR SHANE GRANT BE LIABLE FOR ANY
22 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
23 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
24 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #ifndef CEREAL_ARCHIVES_BINARY_HPP_
30 #define CEREAL_ARCHIVES_BINARY_HPP_
32 #include <cereal/cereal.hpp>
37 // ######################################################################
38 //! An output archive designed to save data in a compact binary representation
39 /*! This archive outputs data to a stream in an extremely compact binary
40 representation with as little extra metadata as possible.
42 This archive does nothing to ensure that the endianness of the saved
43 and loaded data is the same. If you need to have portability over
44 architectures with different endianness, use PortableBinaryOutputArchive.
46 When using a binary archive and a file stream, you must use the
47 std::ios::binary format flag to avoid having your data altered
51 class BinaryOutputArchive : public OutputArchive<BinaryOutputArchive, AllowEmptyClassElision>
54 //! Construct, outputting to the provided stream
55 /*! @param stream The stream to output to. Can be a stringstream, a file stream, or
57 BinaryOutputArchive(std::ostream & stream) :
58 OutputArchive<BinaryOutputArchive, AllowEmptyClassElision>(this),
62 //! Writes size bytes of data to the output stream
63 void saveBinary( const void * data, std::size_t size )
65 auto const writtenSize = static_cast<std::size_t>( itsStream.rdbuf()->sputn( reinterpret_cast<const char*>( data ), size ) );
67 if(writtenSize != size)
68 throw Exception("Failed to write " + std::to_string(size) + " bytes to output stream! Wrote " + std::to_string(writtenSize));
72 std::ostream & itsStream;
75 // ######################################################################
76 //! An input archive designed to load data saved using BinaryOutputArchive
77 /* This archive does nothing to ensure that the endianness of the saved
78 and loaded data is the same. If you need to have portability over
79 architectures with different endianness, use PortableBinaryOutputArchive.
81 When using a binary archive and a file stream, you must use the
82 std::ios::binary format flag to avoid having your data altered
86 class BinaryInputArchive : public InputArchive<BinaryInputArchive, AllowEmptyClassElision>
89 //! Construct, loading from the provided stream
90 BinaryInputArchive(std::istream & stream) :
91 InputArchive<BinaryInputArchive, AllowEmptyClassElision>(this),
95 //! Reads size bytes of data from the input stream
96 void loadBinary( void * const data, std::size_t size )
98 auto const readSize = static_cast<std::size_t>( itsStream.rdbuf()->sgetn( reinterpret_cast<char*>( data ), size ) );
101 throw Exception("Failed to read " + std::to_string(size) + " bytes from input stream! Read " + std::to_string(readSize));
105 std::istream & itsStream;
108 // ######################################################################
109 // Common BinaryArchive serialization functions
111 //! Saving for POD types to binary
112 template<class T> inline
113 typename std::enable_if<std::is_arithmetic<T>::value, void>::type
114 save(BinaryOutputArchive & ar, T const & t)
116 ar.saveBinary(std::addressof(t), sizeof(t));
119 //! Loading for POD types from binary
120 template<class T> inline
121 typename std::enable_if<std::is_arithmetic<T>::value, void>::type
122 load(BinaryInputArchive & ar, T & t)
124 ar.loadBinary(std::addressof(t), sizeof(t));
127 //! Serializing NVP types to binary
128 template <class Archive, class T> inline
129 CEREAL_ARCHIVE_RESTRICT(BinaryInputArchive, BinaryOutputArchive)
130 serialize( Archive & ar, NameValuePair<T> & t )
135 //! Serializing SizeTags to binary
136 template <class Archive, class T> inline
137 CEREAL_ARCHIVE_RESTRICT(BinaryInputArchive, BinaryOutputArchive)
138 serialize( Archive & ar, SizeTag<T> & t )
143 //! Saving binary data
144 template <class T> inline
145 void save(BinaryOutputArchive & ar, BinaryData<T> const & bd)
147 ar.saveBinary( bd.data, static_cast<std::size_t>( bd.size ) );
150 //! Loading binary data
151 template <class T> inline
152 void load(BinaryInputArchive & ar, BinaryData<T> & bd)
154 ar.loadBinary(bd.data, static_cast<std::size_t>(bd.size));
156 } // namespace cereal
158 // register archives for polymorphic support
159 CEREAL_REGISTER_ARCHIVE(cereal::BinaryOutputArchive)
160 CEREAL_REGISTER_ARCHIVE(cereal::BinaryInputArchive)
162 #endif // CEREAL_ARCHIVES_BINARY_HPP_