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memorystream.h
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1 // Tencent is pleased to support the open source community by making RapidJSON available.
2 //
3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
4 //
5 // Licensed under the MIT License (the "License"); you may not use this file except
6 // in compliance with the License. You may obtain a copy of the License at
7 //
8 // http://opensource.org/licenses/MIT
9 //
10 // Unless required by applicable law or agreed to in writing, software distributed
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13 // specific language governing permissions and limitations under the License.
14 
15 #ifndef RAPIDJSON_MEMORYSTREAM_H_
16 #define RAPIDJSON_MEMORYSTREAM_H_
17 
18 #include "rapidjson.h"
19 
21 
23 
34 struct MemoryStream {
35  typedef char Ch; // byte
36 
37  MemoryStream(const Ch *src, size_t size) : src_(src), begin_(src), end_(src + size), size_(size) {}
38 
39  Ch Peek() const { return (src_ == end_) ? '\0' : *src_; }
40  Ch Take() { return (src_ == end_) ? '\0' : *src_++; }
41  size_t Tell() const { return static_cast<size_t>(src_ - begin_); }
42 
43  Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
44  void Put(Ch) { RAPIDJSON_ASSERT(false); }
45  void Flush() { RAPIDJSON_ASSERT(false); }
46  size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
47 
48  // For encoding detection only.
49  const Ch* Peek4() const {
50  return Tell() + 4 <= size_ ? src_ : 0;
51  }
52 
53  const Ch* src_;
54  const Ch* begin_;
55  const Ch* end_;
56  size_t size_;
57 };
58 
60 
61 #endif // RAPIDJSON_MEMORYBUFFER_H_
size_t PutEnd(Ch *)
Definition: memorystream.h:46
Represents an in-memory input byte stream.
Definition: memorystream.h:34
#define RAPIDJSON_ASSERT(x)
Assertion.
Definition: rapidjson.h:344
#define RAPIDJSON_NAMESPACE_END
provide custom rapidjson namespace (closing expression)
Definition: rapidjson.h:119
const Ch * end_
End of stream.
Definition: memorystream.h:55
void Put(Ch)
Definition: memorystream.h:44
MemoryStream(const Ch *src, size_t size)
Definition: memorystream.h:37
Ch * PutBegin()
Definition: memorystream.h:43
#define RAPIDJSON_NAMESPACE_BEGIN
provide custom rapidjson namespace (opening expression)
Definition: rapidjson.h:116
const Ch * src_
Current read position.
Definition: memorystream.h:53
const Ch * begin_
Original head of the string.
Definition: memorystream.h:54
const Ch * Peek4() const
Definition: memorystream.h:49
size_t size_
Size of the stream.
Definition: memorystream.h:56
Ch Peek() const
Definition: memorystream.h:39
common definitions and configuration
size_t Tell() const
Definition: memorystream.h:41
char Ch
Definition: memorystream.h:35
void Flush()
Definition: memorystream.h:45
Ch Take()
Definition: memorystream.h:40