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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.
 //
 // 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_MEMORYSTREAM_H_
 #define RAPIDJSON_MEMORYSTREAM_H_
  
 #include "stream.h"
  
 #ifdef __clang__
 RAPIDJSON_DIAG_PUSH
 RAPIDJSON_DIAG_OFF(unreachable - code)
 RAPIDJSON_DIAG_OFF(missing - noreturn)
 #endif
  
 RAPIDJSON_NAMESPACE_BEGIN
  
  
 struct MemoryStream
 {
     typedef char Ch; // byte
  
     MemoryStream(const Ch* src, size_t size) : src_(src), begin_(src), end_(src + size), size_(size)
     {
     }
  
     Ch Peek() const { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_; }
     Ch Take() { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_++; }
     size_t Tell() const { return static_cast<size_t>(src_ - begin_); }
  
     Ch* PutBegin()
     {
         RAPIDJSON_ASSERT(false);
         return 0;
     }
     void Put(Ch) { RAPIDJSON_ASSERT(false); }
     void Flush() { RAPIDJSON_ASSERT(false); }
     size_t PutEnd(Ch*)
     {
         RAPIDJSON_ASSERT(false);
         return 0;
     }
  
     // For encoding detection only.
     const Ch* Peek4() const { return Tell() + 4 <= size_ ? src_ : 0; }
  
     const Ch* src_;   
     const Ch* begin_; 
     const Ch* end_;   
     size_t size_;     
 };
  
 RAPIDJSON_NAMESPACE_END
  
 #ifdef __clang__
 RAPIDJSON_DIAG_POP
 #endif
  
 #endif // RAPIDJSON_MEMORYBUFFER_H_