/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
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** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
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** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
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** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
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****************************************************************************/

#ifndef QJSONPARSER_P_H
#define QJSONPARSER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <qjsondocument.h>
#include <qvarlengtharray.h>

QT_BEGIN_NAMESPACE

namespace QJsonPrivate {

class Parser
{
public:
    Parser(const char *json, int length);

    QJsonDocument parse(QJsonParseError *error);

    class ParsedObject
    {
    public:
        ParsedObject(Parser *p, int pos) : parser(p), objectPosition(pos) {}
        void insert(uint offset);

        Parser *parser;
        int objectPosition;
        QVarLengthArray<uint, 64> offsets;

        inline QJsonPrivate::Entry *entryAt(int i) const {
            return reinterpret_cast<QJsonPrivate::Entry *>(parser->data + objectPosition + offsets[i]);
        }
    };


private:
    inline void eatBOM();
    inline bool eatSpace();
    inline char nextToken();

    bool parseObject();
    bool parseArray();
    bool parseMember(int baseOffset);
    bool parseString(bool *latin1);
    bool parseValue(QJsonPrivate::Value *val, int baseOffset);
    bool parseNumber(QJsonPrivate::Value *val, int baseOffset);
    const char *head;
    const char *json;
    const char *end;

    char *data;
    int dataLength;
    int current;
    int nestingLevel;
    QJsonParseError::ParseError lastError;

    inline int reserveSpace(int space) {
        if (current + space >= dataLength) {
            dataLength = 2*dataLength + space;
            data = (char *)realloc(data, dataLength);
        }
        int pos = current;
        current += space;
        return pos;
    }
};

}

QT_END_NAMESPACE

#endif