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memorystream.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_MEMORYSTREAM_H_
16 #define RAPIDJSON_MEMORYSTREAM_H_
17 
18 #include "stream.h"
19 
20 #ifdef __clang__
21 RAPIDJSON_DIAG_PUSH
22 RAPIDJSON_DIAG_OFF(unreachable-code)
23 RAPIDJSON_DIAG_OFF(missing-noreturn)
24 #endif
25 
27 
29 
40 struct MemoryStream {
41  typedef char Ch; // byte
42 
43  MemoryStream(const Ch *src, size_t size) : src_(src), begin_(src), end_(src + size), size_(size) {}
44 
45  Ch Peek() const { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_; }
46  Ch Take() { return RAPIDJSON_UNLIKELY(src_ == end_) ? '\0' : *src_++; }
47  size_t Tell() const { return static_cast<size_t>(src_ - begin_); }
48 
49  Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
50  void Put(Ch) { RAPIDJSON_ASSERT(false); }
51  void Flush() { RAPIDJSON_ASSERT(false); }
52  size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
53 
54  // For encoding detection only.
55  const Ch* Peek4() const {
56  return Tell() + 4 <= size_ ? src_ : 0;
57  }
58 
59  const Ch* src_;
60  const Ch* begin_;
61  const Ch* end_;
62  size_t size_;
63 };
64 
66 
67 #ifdef __clang__
68 RAPIDJSON_DIAG_POP
69 #endif
70 
71 #endif // RAPIDJSON_MEMORYBUFFER_H_
Ch Peek() const
Definition: memorystream.h:45
void Flush()
Definition: memorystream.h:51
Ch * PutBegin()
Definition: memorystream.h:49
const Ch * Peek4() const
Definition: memorystream.h:55
const Ch * begin_
Original head of the string.
Definition: memorystream.h:60
size_t PutEnd(Ch *)
Definition: memorystream.h:52
Represents an in-memory input byte stream.
Definition: memorystream.h:40
GLsizeiptr size
Definition: glext.h:6559
size_t size_
Size of the stream.
Definition: memorystream.h:62
size_t Tell() const
Definition: memorystream.h:47
#define RAPIDJSON_NAMESPACE_END
provide custom rapidjson namespace (closing expression)
Definition: rapidjson.h:119
const Ch * src_
Current read position.
Definition: memorystream.h:59
char Ch
Definition: memorystream.h:41
MemoryStream(const Ch *src, size_t size)
Definition: memorystream.h:43
#define RAPIDJSON_ASSERT(x)
Assertion.
Definition: rapidjson.h:402
GLenum src
Definition: glext.h:6980
#define RAPIDJSON_UNLIKELY(x)
Compiler branching hint for expression with low probability to be true.
Definition: rapidjson.h:468
Definition: inftrees.h:27
#define RAPIDJSON_NAMESPACE_BEGIN
provide custom rapidjson namespace (opening expression)
Definition: rapidjson.h:116
Ch Take()
Definition: memorystream.h:46
void Put(Ch)
Definition: memorystream.h:50
const Ch * end_
End of stream.
Definition: memorystream.h:61