/**************************************************************************** ** ** 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, ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/ //! [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::max()); //! [4] //! [5] writer.append(0); writer.append(-1); writer.append(Q_INT64_C(4294967296)); writer.append(std::numeric_limits::max()); //! [5] //! [6] writer.append(QCborNegativeInteger(1)); writer.append(QCborNegativeInteger(Q_INT64_C(4294967296))); writer.append(QCborNegativeInteger(-quint64(std::numeric_limits::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 QList &values) { writer.startArray(); for (const QString &s : values) 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 QList> &values) { writer.startMap(); for (const auto pair : values) { writer.append(pair.first) writer.append(pair.second); } writer.endMap(); } //! [22] //! [23] void appendMap(QCborStreamWriter &writer, const QMap &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 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]