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ios/cocos2d/external/json/stringbuffer.h 3.71 KB
520389e3   xiaoyu   接入cocos源码,编译未通过,继续修改
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  // Tencent is pleased to support the open source community by making RapidJSON available.
  // 
  // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
  //
  // Licensed under the MIT License (the "License"); you may not use this file except
  // in compliance with the License. You may obtain a copy of the License at
  //
  // http://opensource.org/licenses/MIT
  //
  // Unless required by applicable law or agreed to in writing, software distributed 
  // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
  // CONDITIONS OF ANY KIND, either express or implied. See the License for the 
  // specific language governing permissions and limitations under the License.
  
  #ifndef RAPIDJSON_STRINGBUFFER_H_
  #define RAPIDJSON_STRINGBUFFER_H_
  
  #include "stream.h"
  #include "internal/stack.h"
  
  #if RAPIDJSON_HAS_CXX11_RVALUE_REFS
  #include <utility> // std::move
  #endif
  
  #include "internal/stack.h"
  
  #if defined(__clang__)
  RAPIDJSON_DIAG_PUSH
  RAPIDJSON_DIAG_OFF(c++98-compat)
  #endif
  
  RAPIDJSON_NAMESPACE_BEGIN
  
  //! Represents an in-memory output stream.
  /*!
      \tparam Encoding Encoding of the stream.
      \tparam Allocator type for allocating memory buffer.
      \note implements Stream concept
  */
  template <typename Encoding, typename Allocator = CrtAllocator>
  class GenericStringBuffer {
  public:
      typedef typename Encoding::Ch Ch;
  
      GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
  
  #if RAPIDJSON_HAS_CXX11_RVALUE_REFS
      GenericStringBuffer(GenericStringBuffer&& rhs) : stack_(std::move(rhs.stack_)) {}
      GenericStringBuffer& operator=(GenericStringBuffer&& rhs) {
          if (&rhs != this)
              stack_ = std::move(rhs.stack_);
          return *this;
      }
  #endif
  
      void Put(Ch c) { *stack_.template Push<Ch>() = c; }
      void PutUnsafe(Ch c) { *stack_.template PushUnsafe<Ch>() = c; }
      void Flush() {}
  
      void Clear() { stack_.Clear(); }
      void ShrinkToFit() {
          // Push and pop a null terminator. This is safe.
          *stack_.template Push<Ch>() = '\0';
          stack_.ShrinkToFit();
          stack_.template Pop<Ch>(1);
      }
  
      void Reserve(size_t count) { stack_.template Reserve<Ch>(count); }
      Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
      Ch* PushUnsafe(size_t count) { return stack_.template PushUnsafe<Ch>(count); }
      void Pop(size_t count) { stack_.template Pop<Ch>(count); }
  
      const Ch* GetString() const {
          // Push and pop a null terminator. This is safe.
          *stack_.template Push<Ch>() = '\0';
          stack_.template Pop<Ch>(1);
  
          return stack_.template Bottom<Ch>();
      }
  
      size_t GetSize() const { return stack_.GetSize(); }
  
      static const size_t kDefaultCapacity = 256;
      mutable internal::Stack<Allocator> stack_;
  
  private:
      // Prohibit copy constructor & assignment operator.
      GenericStringBuffer(const GenericStringBuffer&);
      GenericStringBuffer& operator=(const GenericStringBuffer&);
  };
  
  //! String buffer with UTF8 encoding
  typedef GenericStringBuffer<UTF8<> > StringBuffer;
  
  template<typename Encoding, typename Allocator>
  inline void PutReserve(GenericStringBuffer<Encoding, Allocator>& stream, size_t count) {
      stream.Reserve(count);
  }
  
  template<typename Encoding, typename Allocator>
  inline void PutUnsafe(GenericStringBuffer<Encoding, Allocator>& stream, typename Encoding::Ch c) {
      stream.PutUnsafe(c);
  }
  
  //! Implement specialized version of PutN() with memset() for better performance.
  template<>
  inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
      std::memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
  }
  
  RAPIDJSON_NAMESPACE_END
  
  #if defined(__clang__)
  RAPIDJSON_DIAG_POP
  #endif
  
  #endif // RAPIDJSON_STRINGBUFFER_H_