1697fbdf05
And remove one of the type id to name mapping that still existed in QMetaType. QMetaTypeInterface can provide that, so there's no need to have a second copy of the data. qMetaTypeTypeInternal() can still map all the names of all builtin types to ids. That functionality is for now still required by moc and can't be removed yet. Change-Id: Ib4f8e9c71e1e7d99d52da9e44477c9a1f1805e57 Reviewed-by: Lars Knoll <lars.knoll@qt.io>
515 lines
17 KiB
C++
515 lines
17 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2018 Intel Corporation.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "xmlconverter.h"
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#include <QBitArray>
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#include <QtCborCommon>
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#include <QFile>
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#include <QFloat16>
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#include <QMetaType>
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#include <QRegularExpression>
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#include <QUrl>
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#include <QXmlStreamReader>
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#include <QXmlStreamWriter>
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static const char optionHelp[] =
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"compact=no|yes Use compact XML form.\n";
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static XmlConverter xmlConverter;
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static QVariant variantFromXml(QXmlStreamReader &xml, Converter::Options options);
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static QVariantList listFromXml(QXmlStreamReader &xml, Converter::Options options)
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{
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QVariantList list;
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while (!xml.atEnd() && !(xml.isEndElement() && xml.name() == QLatin1String("list"))) {
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xml.readNext();
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switch (xml.tokenType()) {
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case QXmlStreamReader::StartElement:
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list << variantFromXml(xml, options);
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continue;
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case QXmlStreamReader::EndElement:
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continue;
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case QXmlStreamReader::Comment:
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// ignore comments
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continue;
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case QXmlStreamReader::Characters:
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// ignore whitespace
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if (xml.isWhitespace())
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continue;
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Q_FALLTHROUGH();
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default:
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break;
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}
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fprintf(stderr, "%lld:%lld: Invalid XML %s '%s'.\n",
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xml.lineNumber(), xml.columnNumber(),
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qPrintable(xml.tokenString()), qPrintable(xml.name().toString()));
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exit(EXIT_FAILURE);
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}
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xml.readNext();
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return list;
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}
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static VariantOrderedMap::value_type mapEntryFromXml(QXmlStreamReader &xml, Converter::Options options)
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{
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QVariant key, value;
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while (!xml.atEnd() && !(xml.isEndElement() && xml.name() == QLatin1String("entry"))) {
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xml.readNext();
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switch (xml.tokenType()) {
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case QXmlStreamReader::StartElement:
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if (value.isValid())
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break;
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if (key.isValid())
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value = variantFromXml(xml, options);
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else
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key = variantFromXml(xml, options);
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continue;
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case QXmlStreamReader::EndElement:
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continue;
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case QXmlStreamReader::Comment:
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// ignore comments
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continue;
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case QXmlStreamReader::Characters:
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// ignore whitespace
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if (xml.isWhitespace())
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continue;
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Q_FALLTHROUGH();
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default:
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break;
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}
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fprintf(stderr, "%lld:%lld: Invalid XML %s '%s'.\n",
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xml.lineNumber(), xml.columnNumber(),
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qPrintable(xml.tokenString()), qPrintable(xml.name().toString()));
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exit(EXIT_FAILURE);
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}
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return { key, value };
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}
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static QVariant mapFromXml(QXmlStreamReader &xml, Converter::Options options)
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{
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QVariantMap map1;
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VariantOrderedMap map2;
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while (!xml.atEnd() && !(xml.isEndElement() && xml.name() == QLatin1String("map"))) {
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xml.readNext();
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switch (xml.tokenType()) {
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case QXmlStreamReader::StartElement:
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if (xml.name() == QLatin1String("entry")) {
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auto pair = mapEntryFromXml(xml, options);
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if (options & Converter::SupportsArbitraryMapKeys)
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map2.append(pair);
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else
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map1.insert(pair.first.toString(), pair.second);
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continue;
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}
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break;
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case QXmlStreamReader::EndElement:
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continue;
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case QXmlStreamReader::Comment:
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// ignore comments
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continue;
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case QXmlStreamReader::Characters:
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// ignore whitespace
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if (xml.isWhitespace())
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continue;
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Q_FALLTHROUGH();
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default:
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break;
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}
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fprintf(stderr, "%lld:%lld: Invalid XML %s '%s'.\n",
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xml.lineNumber(), xml.columnNumber(),
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qPrintable(xml.tokenString()), qPrintable(xml.name().toString()));
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exit(EXIT_FAILURE);
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}
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xml.readNext();
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if (options & Converter::SupportsArbitraryMapKeys)
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return QVariant::fromValue(map2);
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return map1;
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}
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static QVariant variantFromXml(QXmlStreamReader &xml, Converter::Options options)
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{
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QStringView name = xml.name();
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if (name == QLatin1String("list"))
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return listFromXml(xml, options);
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if (name == QLatin1String("map"))
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return mapFromXml(xml, options);
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if (name != QLatin1String("value")) {
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fprintf(stderr, "%lld:%lld: Invalid XML key '%s'.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(name.toString()));
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exit(EXIT_FAILURE);
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}
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QXmlStreamAttributes attrs = xml.attributes();
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QStringView type = attrs.value(QLatin1String("type"));
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forever {
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xml.readNext();
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if (xml.isComment())
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continue;
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if (xml.isCDATA() || xml.isCharacters() || xml.isEndElement())
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break;
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fprintf(stderr, "%lld:%lld: Invalid XML %s '%s'.\n",
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xml.lineNumber(), xml.columnNumber(),
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qPrintable(xml.tokenString()), qPrintable(name.toString()));
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exit(EXIT_FAILURE);
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}
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QStringView text = xml.text();
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if (!xml.isCDATA())
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text = text.trimmed();
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QVariant result;
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bool ok;
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if (type.isEmpty()) {
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// ok
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} else if (type == QLatin1String("number")) {
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// try integer first
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qint64 v = text.toLongLong(&ok);
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if (ok) {
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result = v;
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} else {
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// let's see floating point
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double d = text.toDouble(&ok);
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result = d;
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if (!ok) {
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fprintf(stderr, "%lld:%lld: Invalid XML: could not interpret '%s' as a number.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(text.toString()));
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exit(EXIT_FAILURE);
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}
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}
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} else if (type == QLatin1String("bytes")) {
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QByteArray data = text.toLatin1();
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QStringView encoding = attrs.value("encoding");
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if (encoding == QLatin1String("base64url")) {
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result = QByteArray::fromBase64(data, QByteArray::Base64UrlEncoding);
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} else if (encoding == QLatin1String("hex")) {
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result = QByteArray::fromHex(data);
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} else if (encoding.isEmpty() || encoding == QLatin1String("base64")) {
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result = QByteArray::fromBase64(data);
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} else {
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fprintf(stderr, "%lld:%lld: Invalid XML: unknown encoding '%s' for bytes.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(encoding.toString()));
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exit(EXIT_FAILURE);
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}
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} else if (type == QLatin1String("string")) {
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result = text.toString();
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} else if (type == QLatin1String("null")) {
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result = QVariant::fromValue(nullptr);
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} else if (type == QLatin1String("CBOR simple type")) {
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result = QVariant::fromValue(QCborSimpleType(text.toShort()));
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} else if (type == QLatin1String("bits")) {
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QBitArray ba;
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ba.resize(text.size());
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qsizetype n = 0;
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for (qsizetype i = 0; i < text.size(); ++i) {
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QChar c = text.at(i);
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if (c == '1') {
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ba.setBit(n++);
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} else if (c == '0') {
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++n;
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} else if (!c.isSpace()) {
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fprintf(stderr, "%lld:%lld: Invalid XML: invalid bit string '%s'.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(text.toString()));
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exit(EXIT_FAILURE);
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}
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}
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ba.resize(n);
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result = ba;
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} else {
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int id = QMetaType::UnknownType;
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if (type == QLatin1String("datetime"))
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id = QMetaType::QDateTime;
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else if (type == QLatin1String("url"))
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id = QMetaType::QUrl;
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else if (type == QLatin1String("uuid"))
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id = QMetaType::QUuid;
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else if (type == QLatin1String("regex"))
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id = QMetaType::QRegularExpression;
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else
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id = QMetaType::fromName(type.toLatin1()).id();
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if (id == QMetaType::UnknownType) {
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fprintf(stderr, "%lld:%lld: Invalid XML: unknown type '%s'.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(type.toString()));
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exit(EXIT_FAILURE);
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}
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result = text.toString();
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if (!result.convert(QMetaType(id))) {
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fprintf(stderr, "%lld:%lld: Invalid XML: could not parse content as type '%s'.\n",
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xml.lineNumber(), xml.columnNumber(), qPrintable(type.toString()));
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exit(EXIT_FAILURE);
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}
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}
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do {
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xml.readNext();
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} while (xml.isComment() || xml.isWhitespace());
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if (!xml.isEndElement()) {
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fprintf(stderr, "%lld:%lld: Invalid XML %s '%s'.\n",
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xml.lineNumber(), xml.columnNumber(),
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qPrintable(xml.tokenString()), qPrintable(name.toString()));
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exit(EXIT_FAILURE);
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}
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xml.readNext();
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return result;
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}
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static void variantToXml(QXmlStreamWriter &xml, const QVariant &v)
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{
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int type = v.userType();
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if (type == QMetaType::QVariantList) {
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QVariantList list = v.toList();
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xml.writeStartElement("list");
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for (const QVariant &v : list)
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variantToXml(xml, v);
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xml.writeEndElement();
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} else if (type == QMetaType::QVariantMap || type == qMetaTypeId<VariantOrderedMap>()) {
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const VariantOrderedMap map = (type == QMetaType::QVariantMap) ?
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VariantOrderedMap(v.toMap()) :
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qvariant_cast<VariantOrderedMap>(v);
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xml.writeStartElement("map");
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for (const auto &pair : map) {
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xml.writeStartElement("entry");
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variantToXml(xml, pair.first);
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variantToXml(xml, pair.second);
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xml.writeEndElement();
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}
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xml.writeEndElement();
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} else {
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xml.writeStartElement("value");
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QString typeString = QStringLiteral("type");
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switch (type) {
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case QMetaType::Short:
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case QMetaType::UShort:
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case QMetaType::Int:
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case QMetaType::UInt:
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case QMetaType::Long:
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case QMetaType::ULong:
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case QMetaType::LongLong:
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case QMetaType::ULongLong:
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case QMetaType::Float:
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case QMetaType::Double:
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xml.writeAttribute(typeString, "number");
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xml.writeCharacters(v.toString());
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break;
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case QMetaType::QByteArray:
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xml.writeAttribute(typeString, "bytes");
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xml.writeAttribute("encoding", "base64");
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xml.writeCharacters(QString::fromLatin1(v.toByteArray().toBase64()));
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break;
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case QMetaType::QString:
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xml.writeAttribute(typeString, "string");
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xml.writeCDATA(v.toString());
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break;
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case QMetaType::Bool:
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xml.writeAttribute(typeString, "bool");
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xml.writeCharacters(v.toString());
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break;
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case QMetaType::Nullptr:
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xml.writeAttribute(typeString, "null");
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break;
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case QMetaType::UnknownType:
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break;
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case QMetaType::QDate:
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case QMetaType::QTime:
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case QMetaType::QDateTime:
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xml.writeAttribute(typeString, "dateime");
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xml.writeCharacters(v.toString());
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break;
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case QMetaType::QUrl:
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xml.writeAttribute(typeString, "url");
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xml.writeCharacters(v.toUrl().toString(QUrl::FullyEncoded));
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break;
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case QMetaType::QUuid:
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xml.writeAttribute(typeString, "uuid");
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xml.writeCharacters(v.toString());
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break;
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case QMetaType::QBitArray:
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xml.writeAttribute(typeString, "bits");
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xml.writeCharacters([](const QBitArray &ba) {
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QString result;
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for (qsizetype i = 0; i < ba.size(); ++i) {
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if (i && i % 72 == 0)
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result += '\n';
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result += QLatin1Char(ba.testBit(i) ? '1' : '0');
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}
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return result;
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}(v.toBitArray()));
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break;
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case QMetaType::QRegularExpression:
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xml.writeAttribute(typeString, "regex");
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xml.writeCharacters(v.toRegularExpression().pattern());
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break;
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default:
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if (type == qMetaTypeId<qfloat16>()) {
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xml.writeAttribute(typeString, "number");
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xml.writeCharacters(QString::number(float(qvariant_cast<qfloat16>(v))));
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} else if (type == qMetaTypeId<QCborSimpleType>()) {
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xml.writeAttribute(typeString, "CBOR simple type");
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xml.writeCharacters(QString::number(int(qvariant_cast<QCborSimpleType>(v))));
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} else {
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// does this convert to string?
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const char *typeName = v.typeName();
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QVariant copy = v;
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if (copy.convert(QMetaType(QMetaType::QString))) {
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xml.writeAttribute(typeString, QString::fromLatin1(typeName));
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xml.writeCharacters(copy.toString());
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} else {
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fprintf(stderr, "XML: don't know how to serialize type '%s'.\n", typeName);
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exit(EXIT_FAILURE);
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}
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}
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}
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xml.writeEndElement();
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}
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}
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QString XmlConverter::name()
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{
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return QStringLiteral("xml");
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}
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Converter::Direction XmlConverter::directions()
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{
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return InOut;
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}
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Converter::Options XmlConverter::outputOptions()
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{
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return SupportsArbitraryMapKeys;
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}
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const char *XmlConverter::optionsHelp()
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{
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return optionHelp;
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}
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bool XmlConverter::probeFile(QIODevice *f)
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{
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if (QFile *file = qobject_cast<QFile *>(f)) {
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if (file->fileName().endsWith(QLatin1String(".xml")))
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return true;
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}
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return f->isReadable() && f->peek(5) == "<?xml";
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}
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QVariant XmlConverter::loadFile(QIODevice *f, Converter *&outputConverter)
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{
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if (!outputConverter)
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outputConverter = this;
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QXmlStreamReader xml(f);
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xml.readNextStartElement();
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QVariant v = variantFromXml(xml, outputConverter->outputOptions());
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if (xml.hasError()) {
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fprintf(stderr, "XML error: %s", qPrintable(xml.errorString()));
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exit(EXIT_FAILURE);
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}
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return v;
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}
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void XmlConverter::saveFile(QIODevice *f, const QVariant &contents, const QStringList &options)
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{
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bool compact = false;
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for (const QString &s : options) {
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if (s == QLatin1String("compact=no")) {
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compact = false;
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} else if (s == QLatin1String("compact=yes")) {
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compact = true;
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} else {
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fprintf(stderr, "Unknown option '%s' to XML output. Valid options are:\n%s", qPrintable(s), optionHelp);
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exit(EXIT_FAILURE);
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}
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}
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QXmlStreamWriter xml(f);
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xml.setAutoFormatting(!compact);
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xml.writeStartDocument();
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variantToXml(xml, contents);
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xml.writeEndDocument();
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}
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