cursorstreamwrapper.h

Engine/source/persistence/rapidjson/cursorstreamwrapper.h

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 1
 2// Tencent is pleased to support the open source community by making RapidJSON available.
 3//
 4// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
 5//
 6// Licensed under the MIT License (the "License"); you may not use this file except
 7// in compliance with the License. You may obtain a copy of the License at
 8//
 9// http://opensource.org/licenses/MIT
10//
11// Unless required by applicable law or agreed to in writing, software distributed
12// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
13// CONDITIONS OF ANY KIND, either express or implied. See the License for the
14// specific language governing permissions and limitations under the License.
15
16#ifndef RAPIDJSON_CURSORSTREAMWRAPPER_H_
17#define RAPIDJSON_CURSORSTREAMWRAPPER_H_
18
19#include "stream.h"
20
21#if defined(__GNUC__)
22RAPIDJSON_DIAG_PUSH
23RAPIDJSON_DIAG_OFF(effc++)
24#endif
25
26#if defined(_MSC_VER) && _MSC_VER <= 1800
27RAPIDJSON_DIAG_PUSH
28RAPIDJSON_DIAG_OFF(4702)  // unreachable code
29RAPIDJSON_DIAG_OFF(4512)  // assignment operator could not be generated
30#endif
31
32RAPIDJSON_NAMESPACE_BEGIN
33
34
35//! Cursor stream wrapper for counting line and column number if error exists.
36/*!
37    \tparam InputStream     Any stream that implements Stream Concept
38*/
39template <typename InputStream, typename Encoding = UTF8<> >
40class CursorStreamWrapper : public GenericStreamWrapper<InputStream, Encoding> {
41public:
42    typedef typename Encoding::Ch Ch;
43
44    CursorStreamWrapper(InputStream& is):
45        GenericStreamWrapper<InputStream, Encoding>(is), line_(1), col_(0) {}
46
47    // counting line and column number
48    Ch Take() {
49        Ch ch = this->is_.Take();
50        if(ch == '\n') {
51            line_ ++;
52            col_ = 0;
53        } else {
54            col_ ++;
55        }
56        return ch;
57    }
58
59    //! Get the error line number, if error exists.
60    size_t GetLine() const { return line_; }
61    //! Get the error column number, if error exists.
62    size_t GetColumn() const { return col_; }
63
64private:
65    size_t line_;   //!< Current Line
66    size_t col_;    //!< Current Column
67};
68
69#if defined(_MSC_VER) && _MSC_VER <= 1800
70RAPIDJSON_DIAG_POP
71#endif
72
73#if defined(__GNUC__)
74RAPIDJSON_DIAG_POP
75#endif
76
77RAPIDJSON_NAMESPACE_END
78
79#endif // RAPIDJSON_CURSORSTREAMWRAPPER_H_
80