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extern/rapidjson/include/rapidjson/memorybuffer.h
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| // Copyright (C) 2011 Milo Yip | |||||
| // | |||||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | |||||
| // of this software and associated documentation files (the "Software"), to deal | |||||
| // in the Software without restriction, including without limitation the rights | |||||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |||||
| // copies of the Software, and to permit persons to whom the Software is | |||||
| // furnished to do so, subject to the following conditions: | |||||
| // | |||||
| // The above copyright notice and this permission notice shall be included in | |||||
| // all copies or substantial portions of the Software. | |||||
| // | |||||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |||||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |||||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |||||
| // THE SOFTWARE. | |||||
| #ifndef RAPIDJSON_MEMORYBUFFER_H_ | |||||
| #define RAPIDJSON_MEMORYBUFFER_H_ | |||||
| #include "rapidjson.h" | |||||
| #include "internal/stack.h" | |||||
| namespace rapidjson { | |||||
| //! Represents an in-memory output byte stream. | |||||
| /*! | |||||
| This class is mainly for being wrapped by EncodedOutputStream or AutoUTFOutputStream. | |||||
| It is similar to FileWriteBuffer but the destination is an in-memory buffer instead of a file. | |||||
| Differences between MemoryBuffer and StringBuffer: | |||||
| 1. StringBuffer has Encoding but MemoryBuffer is only a byte buffer. | |||||
| 2. StringBuffer::GetString() returns a null-terminated string. MemoryBuffer::GetBuffer() returns a buffer without terminator. | |||||
| \tparam Allocator type for allocating memory buffer. | |||||
| \note implements Stream concept | |||||
| */ | |||||
| template <typename Allocator = CrtAllocator> | |||||
| struct GenericMemoryBuffer { | |||||
| typedef char Ch; // byte | |||||
| GenericMemoryBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {} | |||||
| void Put(Ch c) { *stack_.template Push<Ch>() = c; } | |||||
| void Flush() {} | |||||
| void Clear() { stack_.Clear(); } | |||||
| void ShrinkToFit() { stack_.ShrinkToFit(); } | |||||
| Ch* Push(size_t count) { return stack_.template Push<Ch>(count); } | |||||
| void Pop(size_t count) { stack_.template Pop<Ch>(count); } | |||||
| const Ch* GetBuffer() const { | |||||
| return stack_.template Bottom<Ch>(); | |||||
| } | |||||
| size_t GetSize() const { return stack_.GetSize(); } | |||||
| static const size_t kDefaultCapacity = 256; | |||||
| mutable internal::Stack<Allocator> stack_; | |||||
| }; | |||||
| typedef GenericMemoryBuffer<> MemoryBuffer; | |||||
| //! Implement specialized version of PutN() with memset() for better performance. | |||||
| template<> | |||||
| inline void PutN(MemoryBuffer& memoryBuffer, char c, size_t n) { | |||||
| memset(memoryBuffer.stack_.Push<char>(n), c, n * sizeof(c)); | |||||
| } | |||||
| } // namespace rapidjson | |||||
| #endif // RAPIDJSON_MEMORYBUFFER_H_ | |||||