RapidJSON: include/rapidjson/cursorstreamwrapper.h 源文件

cursorstreamwrapper.h
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.
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
11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
13 // specific language governing permissions and limitations under the License.
14
15 #ifndef RAPIDJSON_CURSORSTREAMWRAPPER_H_
16 #define RAPIDJSON_CURSORSTREAMWRAPPER_H_
17
18 #include "stream.h"
19
20 #if defined(__GNUC__)
21 RAPIDJSON_DIAG_PUSH
22 RAPIDJSON_DIAG_OFF(effc++)
23 #endif
24
25 #if defined(_MSC_VER) && _MSC_VER <= 1800
26 RAPIDJSON_DIAG_PUSH
27 RAPIDJSON_DIAG_OFF(4702) // unreachable code
28 RAPIDJSON_DIAG_OFF(4512) // assignment operator could not be generated
29 #endif
30
31 RAPIDJSON_NAMESPACE_BEGIN
32
33
34 //! Cursor stream wrapper for counting line and column number if error exists.
35 /*!
36 \tparam InputStream Any stream that implements Stream Concept
37 */
38 template <typename InputStream, typename Encoding = UTF8<> >
39 class CursorStreamWrapper : public GenericStreamWrapper<InputStream, Encoding> {
40 public:
41 typedef typename Encoding::Ch Ch;
42
43 CursorStreamWrapper(InputStream& is):
44 GenericStreamWrapper<InputStream, Encoding>(is), line_(1), col_(0) {}
45
46 // counting line and column number
47 Ch Take() {
48 Ch ch = this->is_.Take();
49 if(ch == '\n') {
50 line_ ++;
51 col_ = 0;
52 } else {
53 col_ ++;
54 }
55 return ch;
56 }
57
58 //! Get the error line number, if error exists.
59 size_t GetLine() const { return line_; }
60 //! Get the error column number, if error exists.
61 size_t GetColumn() const { return col_; }
62
63 private:
64 size_t line_; //!< Current Line
65 size_t col_; //!< Current Column
66 };
67
68 #if defined(_MSC_VER) && _MSC_VER <= 1800
69 RAPIDJSON_DIAG_POP
70 #endif
71
72 #if defined(__GNUC__)
73 RAPIDJSON_DIAG_POP
74 #endif
75
76 RAPIDJSON_NAMESPACE_END
77
78 #endif // RAPIDJSON_CURSORSTREAMWRAPPER_H_
rapidjson::CursorStreamWrapper::GetColumn
size_t GetColumn() const
Get the error column number, if error exists.
Definition: cursorstreamwrapper.h:61
rapidjson::GenericStreamWrapper
A Stream Wrapper
Definition: stream.h:119
rapidjson::CursorStreamWrapper::GetLine
size_t GetLine() const
Get the error line number, if error exists.
Definition: cursorstreamwrapper.h:59
rapidjson::CursorStreamWrapper
Cursor stream wrapper for counting line and column number if error exists.
Definition: cursorstreamwrapper.h:39