| /**************************************************************************** |
| ** |
| ** Copyright (C) 2018 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the documentation of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:BSD$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** BSD License Usage |
| ** Alternatively, you may use this file under the terms of the BSD license |
| ** as follows: |
| ** |
| ** "Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * 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. |
| ** * Neither the name of The Qt Company Ltd nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** |
| ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| ** "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 THE COPYRIGHT |
| ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| //! [0] |
| QCborValue(QCborTag(2), QByteArray("\x01\0\0\0\0\0\0\0\0", 9)); |
| //! [0] |
| |
| //! [1] |
| writer.startMap(4); // 4 elements in the map |
| |
| writer.append(QLatin1String("label")); |
| writer.append(QLatin1String("journald")); |
| |
| writer.append(QLatin1String("autoDetect")); |
| writer.append(false); |
| |
| writer.append(QLatin1String("condition")); |
| writer.append(QLatin1String("libs.journald")); |
| |
| writer.append(QLatin1String("output")); |
| writer.startArray(1); |
| writer.append(QLatin1String("privateFeature")); |
| writer.endArray(); |
| |
| writer.endMap(); |
| //! [1] |
| |
| //! [2] |
| QFile f("output", QIODevice::WriteOnly); |
| QCborStreamWriter writer(&f); |
| writer.startMap(0); |
| writer.endMap(); |
| //! [2] |
| |
| //! [3] |
| QByteArray encodedNumber(qint64 value) |
| { |
| QByteArray ba; |
| QCborStreamWriter writer(&ba); |
| writer.append(value); |
| return ba; |
| } |
| //! [3] |
| |
| //! [4] |
| writer.append(0U); |
| writer.append(Q_UINT64_C(4294967296)); |
| writer.append(std::numeric_limits<quint64>::max()); |
| //! [4] |
| |
| //! [5] |
| writer.append(0); |
| writer.append(-1); |
| writer.append(Q_INT64_C(4294967296)); |
| writer.append(std::numeric_limits<qint64>::max()); |
| //! [5] |
| |
| //! [6] |
| writer.append(QCborNegativeInteger(1)); |
| writer.append(QCborNegativeInteger(Q_INT64_C(4294967296))); |
| writer.append(QCborNegativeInteger(-quint64(std::numeric_limits<qint64>::min()))); |
| //! [6] |
| |
| //! [7] |
| void writeFile(QCborStreamWriter &writer, const QString &fileName) |
| { |
| QFile f(fileName); |
| if (f.open(QIODevice::ReadOnly)) |
| writer.append(f.readAll()); |
| } |
| //! [7] |
| |
| //! [8] |
| writer.append(QLatin1String("Hello, World")); |
| //! [8] |
| |
| //! [9] |
| void writeString(QCborStreamWriter &writer, const QString &str) |
| { |
| writer.append(str); |
| } |
| //! [9] |
| |
| //! [10] |
| void writeRxPattern(QCborStreamWriter &writer, const QRegularExpression &rx) |
| { |
| writer.append(QCborTag(36)); |
| writer.append(rx.pattern()); |
| } |
| //! [10] |
| |
| //! [11] |
| void writeCurrentTime(QCborStreamWriter &writer) |
| { |
| writer.append(QCborKnownTags::UnixTime_t); |
| writer.append(time(nullptr)); |
| } |
| //! [11] |
| |
| //! [12] |
| writer.append(QCborSimpleType::Null); |
| writer.append(QCborSimpleType(32)); |
| //! [12] |
| |
| //! [13] |
| void writeFloat(QCborStreamWriter &writer, float f) |
| { |
| qfloat16 f16 = f; |
| if (qIsNaN(f) || f16 == f) |
| writer.append(f16); |
| else |
| writer.append(f); |
| } |
| //! [13] |
| |
| //! [14] |
| void writeFloat(QCborStreamWriter &writer, double d) |
| { |
| float f = d; |
| if (qIsNaN(d) || d == f) |
| writer.append(f); |
| else |
| writer.append(d); |
| } |
| //! [14] |
| |
| //! [15] |
| void writeDouble(QCborStreamWriter &writer, double d) |
| { |
| float f; |
| if (qIsNaN(d)) { |
| writer.append(qfloat16(qQNaN())); |
| } else if (qIsInf(d)) { |
| writer.append(d < 0 ? -qInf() : qInf()); |
| } else if ((f = d) == d) { |
| qfloat16 f16 = f; |
| if (f16 == f) |
| writer.append(f16); |
| else |
| writer.append(f); |
| } else { |
| writer.append(d); |
| } |
| } |
| //! [15] |
| |
| //! [16] |
| writer.append(b ? QCborSimpleType::True : QCborSimpleType::False); |
| //! [16] |
| |
| //! [17] |
| writer.append(QCborSimpleType::Null); |
| //! [17] |
| |
| //! [18] |
| writer.append(QCborSimpleType::Null); |
| //! [18] |
| |
| //! [19] |
| writer.append(QCborSimpleType::Undefined); |
| //! [19] |
| |
| //! [20] |
| void appendList(QCborStreamWriter &writer, const QLinkedList<QString> &list) |
| { |
| writer.startArray(); |
| for (const QString &s : list) |
| writer.append(s); |
| writer.endArray(); |
| } |
| //! [20] |
| |
| //! [21] |
| void appendList(QCborStreamWriter &writer, const QStringList &list) |
| { |
| writer.startArray(list.size()); |
| for (const QString &s : list) |
| writer.append(s); |
| writer.endArray(); |
| } |
| //! [21] |
| |
| //! [22] |
| void appendMap(QCborStreamWriter &writer, const QLinkedList<QPair<int, QString>> &list) |
| { |
| writer.startMap(); |
| for (const auto pair : list) { |
| writer.append(pair.first) |
| writer.append(pair.second); |
| } |
| writer.endMap(); |
| } |
| //! [22] |
| |
| //! [23] |
| void appendMap(QCborStreamWriter &writer, const QMap<int, QString> &map) |
| { |
| writer.startMap(map.size()); |
| for (auto it = map.begin(); it != map.end(); ++it) { |
| writer.append(it.key()); |
| writer.append(it.value()); |
| } |
| writer.endMap(); |
| } |
| //! [23] |
| |
| //! [24] |
| void handleStream(QCborStreamReader &reader) |
| { |
| switch (reader.type()) |
| case QCborStreamReader::UnsignedInteger: |
| case QCborStreamReader::NegativeInteger: |
| case QCborStreamReader::SimpleType: |
| case QCborStreamReader::Float16: |
| case QCborStreamReader::Float: |
| case QCborStreamReader::Double: |
| handleFixedWidth(reader); |
| reader.next(); |
| break; |
| case QCborStreamReader::ByteArray: |
| case QCborStreamReader::String: |
| handleString(reader); |
| break; |
| case QCborStreamReader::Array: |
| case QCborStreamReader::Map: |
| reader.enterContainer(); |
| while (reader.lastError() == QCborError::NoError) |
| handleStream(reader); |
| if (reader.lastError() == QCborError::NoError) |
| reader.leaveContainer(); |
| } |
| } |
| //! [24] |
| |
| //! [25] |
| QVariantList populateFromCbor(QCborStreamReader &reader) |
| { |
| QVariantList list; |
| if (reader.isLengthKnown()) |
| list.reserve(reader.length()); |
| |
| reader.enterContainer(); |
| while (reader.lastError() == QCborError::NoError && reader.hasNext()) |
| list.append(readOneElement(reader)); |
| if (reader.lastError() == QCborError::NoError) |
| reader.leaveContainer(); |
| } |
| //! [25] |
| |
| //! [26] |
| QVariantMap populateFromCbor(QCborStreamReader &reader) |
| { |
| QVariantMap map; |
| if (reader.isLengthKnown()) |
| map.reserve(reader.length()); |
| |
| reader.enterContainer(); |
| while (reader.lastError() == QCborError::NoError && reader.hasNext()) { |
| QString key = readElementAsString(reader); |
| map.insert(key, readOneElement(reader)); |
| } |
| if (reader.lastError() == QCborError::NoError) |
| reader.leaveContainer(); |
| } |
| //! [26] |
| |
| //! [27] |
| QString decodeString(QCborStreamReader &reader) |
| { |
| QString result; |
| auto r = reader.readString(); |
| while (r.code == QCborStreamReader::Ok) { |
| result += r.data; |
| r = reader.readString(); |
| } |
| |
| if (r.code == QCborStreamReader::Error) { |
| // handle error condition |
| result.clear(); |
| } |
| return result; |
| } |
| //! [27] |
| |
| //! [28] |
| QBytearray decodeBytearray(QCborStreamReader &reader) |
| { |
| QBytearray result; |
| auto r = reader.readBytearray(); |
| while (r.code == QCborStreamReader::Ok) { |
| result += r.data; |
| r = reader.readByteArray(); |
| } |
| |
| if (r.code == QCborStreamReader::Error) { |
| // handle error condition |
| result.clear(); |
| } |
| return result; |
| } |
| //! [28] |
| |
| //! [29] |
| QCborStreamReader<qsizetype> result; |
| do { |
| qsizetype size = reader.currentStringChunkSize(); |
| qsizetype oldsize = buffer.size(); |
| buffer.resize(oldsize + size); |
| result = reader.readStringChunk(buffer.data() + oldsize, size); |
| } while (result.status() == QCborStreamReader::Ok); |
| //! [29] |