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Diffstat (limited to 'src/json.h')
| -rw-r--r-- | src/json.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/json.h b/src/json.h new file mode 100644 index 00000000..d2cfa9a8 --- /dev/null +++ b/src/json.h @@ -0,0 +1,204 @@ +/* Copyright 2011 Eeli Reilin. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ''AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL EELI REILIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation
+ * are those of the authors and should not be interpreted as representing
+ * official policies, either expressed or implied, of Eeli Reilin.
+ */
+
+/**
+ * \file json.h
+ */
+
+#ifndef JSON_H
+#define JSON_H
+
+#include <QVariant>
+#include <QString>
+
+namespace QtJson
+{
+
+/**
+ * \enum JsonToken
+ */
+enum JsonToken
+{
+ JsonTokenNone = 0,
+ JsonTokenCurlyOpen = 1,
+ JsonTokenCurlyClose = 2,
+ JsonTokenSquaredOpen = 3,
+ JsonTokenSquaredClose = 4,
+ JsonTokenColon = 5,
+ JsonTokenComma = 6,
+ JsonTokenString = 7,
+ JsonTokenNumber = 8,
+ JsonTokenTrue = 9,
+ JsonTokenFalse = 10,
+ JsonTokenNull = 11
+};
+
+/**
+ * \class Json
+ * \brief A JSON data parser
+ *
+ * Json parses a JSON data into a QVariant hierarchy.
+ */
+class Json
+{
+ public:
+ /**
+ * Parse a JSON string
+ *
+ * \param json The JSON data
+ */
+ static QVariant parse(const QString &json);
+
+ /**
+ * Parse a JSON string
+ *
+ * \param json The JSON data
+ * \param success The success of the parsing
+ */
+ static QVariant parse(const QString &json, bool &success);
+
+ /**
+ * This method generates a textual JSON representation
+ *
+ * \param data The JSON data generated by the parser.
+ * \param success The success of the serialization
+ */
+ static QByteArray serialize(const QVariant &data);
+
+ /**
+ * This method generates a textual JSON representation
+ *
+ * \param data The JSON data generated by the parser.
+ * \param success The success of the serialization
+ *
+ * \return QByteArray Textual JSON representation
+ */
+ static QByteArray serialize(const QVariant &data, bool &success);
+
+ private:
+ /**
+ * Parses a value starting from index
+ *
+ * \param json The JSON data
+ * \param index The start index
+ * \param success The success of the parse process
+ *
+ * \return QVariant The parsed value
+ */
+ static QVariant parseValue(const QString &json, int &index,
+ bool &success);
+
+ /**
+ * Parses an object starting from index
+ *
+ * \param json The JSON data
+ * \param index The start index
+ * \param success The success of the object parse
+ *
+ * \return QVariant The parsed object map
+ */
+ static QVariant parseObject(const QString &json, int &index,
+ bool &success);
+
+ /**
+ * Parses an array starting from index
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ * \param success The success of the array parse
+ *
+ * \return QVariant The parsed variant array
+ */
+ static QVariant parseArray(const QString &json, int &index,
+ bool &success);
+
+ /**
+ * Parses a string starting from index
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ * \param success The success of the string parse
+ *
+ * \return QVariant The parsed string
+ */
+ static QVariant parseString(const QString &json, int &index,
+ bool &success);
+
+ /**
+ * Parses a number starting from index
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ *
+ * \return QVariant The parsed number
+ */
+ static QVariant parseNumber(const QString &json, int &index);
+
+ /**
+ * Get the last index of a number starting from index
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ *
+ * \return The last index of the number
+ */
+ static int lastIndexOfNumber(const QString &json, int index);
+
+ /**
+ * Skip unwanted whitespace symbols starting from index
+ *
+ * \param json The JSON data
+ * \param index The start index
+ */
+ static void eatWhitespace(const QString &json, int &index);
+
+ /**
+ * Check what token lies ahead
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ *
+ * \return int The upcoming token
+ */
+ static int lookAhead(const QString &json, int index);
+
+ /**
+ * Get the next JSON token
+ *
+ * \param json The JSON data
+ * \param index The starting index
+ *
+ * \return int The next JSON token
+ */
+ static int nextToken(const QString &json, int &index);
+};
+
+
+} //end namespace
+
+#endif //JSON_H
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