mirror of
https://github.com/RPCS3/cereal.git
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677e7e6c8e
Updated and made changes necessary for the new version of rapidjson. Looks good on ubuntu under the compilers I can test with, needs MSVC testing. We had some internal changes to rapidjson but these didn't seem necessary with the new version. Haven't done any performance testing, initial estimates put it at nearly the same speed for json serialization. Could probably optimize things. relates #82, #121
71 lines
2.5 KiB
C++
71 lines
2.5 KiB
C++
// Tencent is pleased to support the open source community by making RapidJSON available.
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//
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// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
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//
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// Licensed under the MIT License (the "License"); you may not use this file except
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// in compliance with the License. You may obtain a copy of the License at
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//
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// http://opensource.org/licenses/MIT
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//
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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#ifndef CEREAL_RAPIDJSON_MEMORYBUFFER_H_
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#define CEREAL_RAPIDJSON_MEMORYBUFFER_H_
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#include "stream.h"
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#include "internal/stack.h"
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CEREAL_RAPIDJSON_NAMESPACE_BEGIN
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//! Represents an in-memory output byte stream.
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/*!
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This class is mainly for being wrapped by EncodedOutputStream or AutoUTFOutputStream.
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It is similar to FileWriteBuffer but the destination is an in-memory buffer instead of a file.
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Differences between MemoryBuffer and StringBuffer:
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1. StringBuffer has Encoding but MemoryBuffer is only a byte buffer.
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2. StringBuffer::GetString() returns a null-terminated string. MemoryBuffer::GetBuffer() returns a buffer without terminator.
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\tparam Allocator type for allocating memory buffer.
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\note implements Stream concept
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*/
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template <typename Allocator = CrtAllocator>
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struct GenericMemoryBuffer {
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typedef char Ch; // byte
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GenericMemoryBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
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void Put(Ch c) { *stack_.template Push<Ch>() = c; }
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void Flush() {}
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void Clear() { stack_.Clear(); }
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void ShrinkToFit() { stack_.ShrinkToFit(); }
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Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
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void Pop(size_t count) { stack_.template Pop<Ch>(count); }
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const Ch* GetBuffer() const {
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return stack_.template Bottom<Ch>();
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}
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size_t GetSize() const { return stack_.GetSize(); }
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static const size_t kDefaultCapacity = 256;
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mutable internal::Stack<Allocator> stack_;
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};
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typedef GenericMemoryBuffer<> MemoryBuffer;
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//! Implement specialized version of PutN() with memset() for better performance.
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template<>
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inline void PutN(MemoryBuffer& memoryBuffer, char c, size_t n) {
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std::memset(memoryBuffer.stack_.Push<char>(n), c, n * sizeof(c));
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}
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CEREAL_RAPIDJSON_NAMESPACE_END
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#endif // CEREAL_RAPIDJSON_MEMORYBUFFER_H_
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