aboutsummaryrefslogtreecommitdiff
path: root/include/rapidjson/error/error.h
blob: 95cb31a72fe2c335f3e9361c8c3d7478ce4fbdcf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
// Tencent is pleased to support the open source community by making RapidJSON available.
// 
// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
//
// Licensed under the MIT License (the "License"); you may not use this file except
// in compliance with the License. You may obtain a copy of the License at
//
// http://opensource.org/licenses/MIT
//
// Unless required by applicable law or agreed to in writing, software distributed 
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 
// CONDITIONS OF ANY KIND, either express or implied. See the License for the 
// specific language governing permissions and limitations under the License.

#ifndef RAPIDJSON_ERROR_ERROR_H_
#define RAPIDJSON_ERROR_ERROR_H_

#include "../rapidjson.h"

#ifdef __clang__
RAPIDJSON_DIAG_PUSH
RAPIDJSON_DIAG_OFF(padded)
#endif

/*! \file error.h */

/*! \defgroup RAPIDJSON_ERRORS RapidJSON error handling */

///////////////////////////////////////////////////////////////////////////////
// RAPIDJSON_ERROR_CHARTYPE

//! Character type of error messages.
/*! \ingroup RAPIDJSON_ERRORS
    The default character type is \c char.
    On Windows, user can define this macro as \c TCHAR for supporting both
    unicode/non-unicode settings.
*/
#ifndef RAPIDJSON_ERROR_CHARTYPE
#define RAPIDJSON_ERROR_CHARTYPE char
#endif

///////////////////////////////////////////////////////////////////////////////
// RAPIDJSON_ERROR_STRING

//! Macro for converting string literial to \ref RAPIDJSON_ERROR_CHARTYPE[].
/*! \ingroup RAPIDJSON_ERRORS
    By default this conversion macro does nothing.
    On Windows, user can define this macro as \c _T(x) for supporting both
    unicode/non-unicode settings.
*/
#ifndef RAPIDJSON_ERROR_STRING
#define RAPIDJSON_ERROR_STRING(x) x
#endif

RAPIDJSON_NAMESPACE_BEGIN

///////////////////////////////////////////////////////////////////////////////
// ParseErrorCode

//! Error code of parsing.
/*! \ingroup RAPIDJSON_ERRORS
    \see GenericReader::Parse, GenericReader::GetParseErrorCode
*/
enum ParseErrorCode {
    kParseErrorNone = 0,                        //!< No error.

    kParseErrorDocumentEmpty,                   //!< The document is empty.
    kParseErrorDocumentRootNotSingular,         //!< The document root must not follow by other values.

    kParseErrorValueInvalid,                    //!< Invalid value.

    kParseErrorObjectMissName,                  //!< Missing a name for object member.
    kParseErrorObjectMissColon,                 //!< Missing a colon after a name of object member.
    kParseErrorObjectMissCommaOrCurlyBracket,   //!< Missing a comma or '}' after an object member.

    kParseErrorArrayMissCommaOrSquareBracket,   //!< Missing a comma or ']' after an array element.

    kParseErrorStringUnicodeEscapeInvalidHex,   //!< Incorrect hex digit after \\u escape in string.
    kParseErrorStringUnicodeSurrogateInvalid,   //!< The surrogate pair in string is invalid.
    kParseErrorStringEscapeInvalid,             //!< Invalid escape character in string.
    kParseErrorStringMissQuotationMark,         //!< Missing a closing quotation mark in string.
    kParseErrorStringInvalidEncoding,           //!< Invalid encoding in string.

    kParseErrorNumberTooBig,                    //!< Number too big to be stored in double.
    kParseErrorNumberMissFraction,              //!< Miss fraction part in number.
    kParseErrorNumberMissExponent,              //!< Miss exponent in number.

    kParseErrorTermination,                     //!< Parsing was terminated.
    kParseErrorUnspecificSyntaxError            //!< Unspecific syntax error.
};

//! Result of parsing (wraps ParseErrorCode)
/*!
    \ingroup RAPIDJSON_ERRORS
    \code
        Document doc;
        ParseResult ok = doc.Parse("[42]");
        if (!ok) {
            fprintf(stderr, "JSON parse error: %s (%u)",
                    GetParseError_En(ok.Code()), ok.Offset());
            exit(EXIT_FAILURE);
        }
    \endcode
    \see GenericReader::Parse, GenericDocument::Parse
*/
struct ParseResult {
public:
    //! Default constructor, no error.
    ParseResult() : code_(kParseErrorNone), offset_(0) {}
    //! Constructor to set an error.
    ParseResult(ParseErrorCode code, size_t offset) : code_(code), offset_(offset) {}

    //! Get the error code.
    ParseErrorCode Code() const { return code_; }
    //! Get the error offset, if \ref IsError(), 0 otherwise.
    size_t Offset() const { return offset_; }

    //! Conversion to \c bool, returns \c true, iff !\ref IsError().
    operator bool() const { return !IsError(); }
    //! Whether the result is an error.
    bool IsError() const { return code_ != kParseErrorNone; }

    bool operator==(const ParseResult& that) const { return code_ == that.code_; }
    bool operator==(ParseErrorCode code) const { return code_ == code; }
    friend bool operator==(ParseErrorCode code, const ParseResult & err) { return code == err.code_; }

    //! Reset error code.
    void Clear() { Set(kParseErrorNone); }
    //! Update error code and offset.
    void Set(ParseErrorCode code, size_t offset = 0) { code_ = code; offset_ = offset; }

private:
    ParseErrorCode code_;
    size_t offset_;
};

//! Function pointer type of GetParseError().
/*! \ingroup RAPIDJSON_ERRORS

    This is the prototype for \c GetParseError_X(), where \c X is a locale.
    User can dynamically change locale in runtime, e.g.:
\code
    GetParseErrorFunc GetParseError = GetParseError_En; // or whatever
    const RAPIDJSON_ERROR_CHARTYPE* s = GetParseError(document.GetParseErrorCode());
\endcode
*/
typedef const RAPIDJSON_ERROR_CHARTYPE* (*GetParseErrorFunc)(ParseErrorCode);

RAPIDJSON_NAMESPACE_END

#ifdef __clang__
RAPIDJSON_DIAG_POP
#endif

#endif // RAPIDJSON_ERROR_ERROR_H_