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stringbuffer.h
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3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
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5 // Licensed under the MIT License (the "License"); you may not use this file except
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14 
15 #ifndef RAPIDJSON_STRINGBUFFER_H_
16 #define RAPIDJSON_STRINGBUFFER_H_
17 
18 #include "rapidjson.h"
19 
20 #if RAPIDJSON_HAS_CXX11_RVALUE_REFS
21 #include <utility> // std::move
22 #endif
23 
24 #include "internal/stack.h"
25 
27 
29 
34 template <typename Encoding, typename Allocator = CrtAllocator>
36 public:
37  typedef typename Encoding::Ch Ch;
38 
39  GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
40 
41 #if RAPIDJSON_HAS_CXX11_RVALUE_REFS
44  if (&rhs != this)
45  stack_ = std::move(rhs.stack_);
46  return *this;
47  }
48 #endif
49 
50  void Put(Ch c) { *stack_.template Push<Ch>() = c; }
51  void Flush() {}
52 
53  void Clear() { stack_.Clear(); }
54  void ShrinkToFit() {
55  // Push and pop a null terminator. This is safe.
56  *stack_.template Push<Ch>() = '\0';
57  stack_.ShrinkToFit();
58  stack_.template Pop<Ch>(1);
59  }
60  Ch* Push(size_t count) { return stack_.template Push<Ch>(count); }
61  void Pop(size_t count) { stack_.template Pop<Ch>(count); }
62 
63  const Ch* GetString() const {
64  // Push and pop a null terminator. This is safe.
65  *stack_.template Push<Ch>() = '\0';
66  stack_.template Pop<Ch>(1);
67 
68  return stack_.template Bottom<Ch>();
69  }
70 
71  size_t GetSize() const { return stack_.GetSize(); }
72 
73  static const size_t kDefaultCapacity = 256;
75 
76 private:
77  // Prohibit copy constructor & assignment operator.
80 };
81 
84 
86 template<>
87 inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
88  std::memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
89 }
90 
92 
93 #endif // RAPIDJSON_STRINGBUFFER_H_
size_t GetSize() const
Definition: stringbuffer.h:71
GenericStringBuffer & operator=(const GenericStringBuffer &)
const Ch * GetString() const
Definition: stringbuffer.h:63
#define RAPIDJSON_NAMESPACE_END
provide custom rapidjson namespace (closing expression)
Definition: rapidjson.h:119
void Put(Ch c)
Definition: stringbuffer.h:50
A type-unsafe stack for storing different types of data.
Definition: stack.h:30
void PutN(GenericStringBuffer< UTF8<> > &stream, char c, size_t n)
Implement specialized version of PutN() with memset() for better performance.
Definition: stringbuffer.h:87
static const size_t kDefaultCapacity
Definition: stringbuffer.h:73
STL namespace.
GenericStringBuffer< UTF8<> > StringBuffer
String buffer with UTF8 encoding.
Definition: stringbuffer.h:83
Encoding::Ch Ch
Definition: stringbuffer.h:37
void ShrinkToFit()
Definition: stringbuffer.h:54
#define RAPIDJSON_NAMESPACE_BEGIN
provide custom rapidjson namespace (opening expression)
Definition: rapidjson.h:116
UTF-8 encoding.
Definition: encodings.h:96
Ch * Push(size_t count)
Definition: stringbuffer.h:60
void Flush()
Definition: stringbuffer.h:51
Represents an in-memory output stream.
Definition: stringbuffer.h:35
GenericStringBuffer(Allocator *allocator=0, size_t capacity=kDefaultCapacity)
Definition: stringbuffer.h:39
void Clear()
Definition: stringbuffer.h:53
common definitions and configuration
internal::Stack< Allocator > stack_
Definition: stringbuffer.h:74
void Pop(size_t count)
Definition: stringbuffer.h:61