diff options
Diffstat (limited to 'examples/corelib/serialization/convert/main.cpp')
| -rw-r--r-- | examples/corelib/serialization/convert/main.cpp | 257 |
1 files changed, 89 insertions, 168 deletions
diff --git a/examples/corelib/serialization/convert/main.cpp b/examples/corelib/serialization/convert/main.cpp index 161fec6bcd..d3021fadca 100644 --- a/examples/corelib/serialization/convert/main.cpp +++ b/examples/corelib/serialization/convert/main.cpp @@ -1,52 +1,6 @@ -/**************************************************************************** -** -** Copyright (C) 2018 Intel Corporation. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples 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." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2018 Intel Corporation. +// Copyright (C) 2023 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "converter.h" @@ -58,177 +12,144 @@ #include <stdio.h> -static QList<Converter *> *availableConverters; +using namespace Qt::StringLiterals; -Converter::Converter() +static const Converter *prepareConverter(QString format, Converter::Direction direction, + QFile *stream) { - if (!availableConverters) - availableConverters = new QList<Converter *>; - availableConverters->append(this); -} + const bool out = direction == Converter::Direction::Out; + const QIODevice::OpenMode mode = out + ? QIODevice::WriteOnly | QIODevice::Truncate + : QIODevice::ReadOnly; + const char *dirn = out ? "output" : "input"; + + if (stream->fileName().isEmpty()) + stream->open(out ? stdout : stdin, mode); + else + stream->open(mode); + + if (!stream->isOpen()) { + qFatal("Could not open \"%s\" for %s: %s", + qPrintable(stream->fileName()), dirn, qPrintable(stream->errorString())); + } else if (format == "auto"_L1) { + for (const Converter *conv : Converter::allConverters()) { + if (conv->directions().testFlag(direction) && conv->probeFile(stream)) + return conv; + } + if (out) // Failure to identify output format can be remedied by loadFile(). + return nullptr; -Converter::~Converter() -{ - availableConverters->removeAll(this); + // Input format, however, we must know before we can call that: + qFatal("Could not determine input format. Specify it with the -I option."); + } else { + for (const Converter *conv : Converter::allConverters()) { + if (conv->name() == format) { + if (!conv->directions().testFlag(direction)) { + qWarning("File format \"%s\" cannot be used for %s", + qPrintable(format), dirn); + continue; // on the off chance there's another with the same name + } + return conv; + } + } + qFatal("Unknown %s file format \"%s\"", dirn, qPrintable(format)); + } + Q_UNREACHABLE_RETURN(nullptr); } int main(int argc, char *argv[]) { QCoreApplication app(argc, argv); +//! [0] QStringList inputFormats; QStringList outputFormats; - for (Converter *conv : qAsConst(*availableConverters)) { + for (const Converter *conv : Converter::allConverters()) { auto direction = conv->directions(); QString name = conv->name(); - if (direction & Converter::In) + if (direction.testFlag(Converter::Direction::In)) inputFormats << name; - if (direction & Converter::Out) + if (direction.testFlag(Converter::Direction::Out)) outputFormats << name; } +//! [0] inputFormats.sort(); outputFormats.sort(); - inputFormats.prepend("auto"); - outputFormats.prepend("auto"); + inputFormats.prepend("auto"_L1); + outputFormats.prepend("auto"_L1); QCommandLineParser parser; - parser.setApplicationDescription(QStringLiteral("Qt file format conversion tool")); + parser.setApplicationDescription("Qt serialization format conversion tool"_L1); parser.addHelpOption(); - QCommandLineOption inputFormatOption(QStringList{"I", "input-format"}); - inputFormatOption.setDescription(QLatin1String("Select the input format for the input file. Available formats: ") + - inputFormats.join(", ")); - inputFormatOption.setValueName("format"); + QCommandLineOption inputFormatOption(QStringList{ "I"_L1, "input-format"_L1 }); + inputFormatOption.setDescription( + "Select the input format for the input file. Available formats: "_L1 + + inputFormats.join(", "_L1)); + inputFormatOption.setValueName("format"_L1); inputFormatOption.setDefaultValue(inputFormats.constFirst()); parser.addOption(inputFormatOption); - QCommandLineOption outputFormatOption(QStringList{"O", "output-format"}); - outputFormatOption.setDescription(QLatin1String("Select the output format for the output file. Available formats: ") + - outputFormats.join(", ")); - outputFormatOption.setValueName("format"); + QCommandLineOption outputFormatOption(QStringList{ "O"_L1, "output-format"_L1 }); + outputFormatOption.setDescription( + "Select the output format for the output file. Available formats: "_L1 + + outputFormats.join(", "_L1)); + outputFormatOption.setValueName("format"_L1); outputFormatOption.setDefaultValue(outputFormats.constFirst()); parser.addOption(outputFormatOption); - QCommandLineOption optionOption(QStringList{"o", "option"}); - optionOption.setDescription(QStringLiteral("Format-specific options. Use --format-options to find out what options are available.")); - optionOption.setValueName("options..."); + QCommandLineOption optionOption(QStringList{ "o"_L1, "option"_L1 }); + optionOption.setDescription( + "Format-specific options. Use --format-options to find out what options are available."_L1); + optionOption.setValueName("options..."_L1); optionOption.setDefaultValues({}); parser.addOption(optionOption); - QCommandLineOption formatOptionsOption("format-options"); - formatOptionsOption.setDescription(QStringLiteral("Prints the list of valid options for --option for the converter format <format>.")); - formatOptionsOption.setValueName("format"); + QCommandLineOption formatOptionsOption("format-options"_L1); + formatOptionsOption.setDescription( + "Prints the list of valid options for --option for the converter format <format>."_L1); + formatOptionsOption.setValueName("format"_L1); parser.addOption(formatOptionsOption); - parser.addPositionalArgument(QStringLiteral("[source]"), - QStringLiteral("File to read from (stdin if none)")); - parser.addPositionalArgument(QStringLiteral("[destination]"), - QStringLiteral("File to write to (stdout if none)")); + parser.addPositionalArgument("[source]"_L1, "File to read from (stdin if none)"_L1); + parser.addPositionalArgument("[destination]"_L1, "File to write to (stdout if none)"_L1); parser.process(app); if (parser.isSet(formatOptionsOption)) { QString format = parser.value(formatOptionsOption); - for (Converter *conv : qAsConst(*availableConverters)) { +//! [1] + for (const Converter *conv : Converter::allConverters()) { if (conv->name() == format) { const char *help = conv->optionsHelp(); - if (help) - printf("The following options are available for format '%s':\n\n%s", qPrintable(format), help); - else - printf("Format '%s' supports no options.\n", qPrintable(format)); + if (help) { + qInfo("The following options are available for format '%s':\n\n%s", + qPrintable(format), help); + } else { + qInfo("Format '%s' supports no options.", qPrintable(format)); + } return EXIT_SUCCESS; } } +//! [1] - fprintf(stderr, "Unknown file format '%s'\n", qPrintable(format)); - return EXIT_FAILURE; - } - - Converter *inconv = nullptr; - QString format = parser.value(inputFormatOption); - if (format != "auto") { - for (Converter *conv : qAsConst(*availableConverters)) { - if (conv->name() == format) { - inconv = conv; - break; - } - } - - if (!inconv) { - fprintf(stderr, "Unknown file format \"%s\"\n", qPrintable(format)); - return EXIT_FAILURE; - } - } - - Converter *outconv = nullptr; - format = parser.value(outputFormatOption); - if (format != "auto") { - for (Converter *conv : qAsConst(*availableConverters)) { - if (conv->name() == format) { - outconv = conv; - break; - } - } - - if (!outconv) { - fprintf(stderr, "Unknown file format \"%s\"\n", qPrintable(format)); - return EXIT_FAILURE; - } + qFatal("Unknown file format '%s'", qPrintable(format)); } +//! [2] QStringList files = parser.positionalArguments(); QFile input(files.value(0)); QFile output(files.value(1)); + const Converter *inconv = prepareConverter(parser.value(inputFormatOption), + Converter::Direction::In, &input); + const Converter *outconv = prepareConverter(parser.value(outputFormatOption), + Converter::Direction::Out, &output); - if (input.fileName().isEmpty()) - input.open(stdin, QIODevice::ReadOnly); - else - input.open(QIODevice::ReadOnly); - if (!input.isOpen()) { - fprintf(stderr, "Could not open \"%s\" for reading: %s\n", - qPrintable(input.fileName()), qPrintable(input.errorString())); - return EXIT_FAILURE; - } - - if (output.fileName().isEmpty()) - output.open(stdout, QIODevice::WriteOnly | QIODevice::Truncate); - else - output.open(QIODevice::WriteOnly | QIODevice::Truncate); - if (!output.isOpen()) { - fprintf(stderr, "Could not open \"%s\" for writing: %s\n", - qPrintable(output.fileName()), qPrintable(output.errorString())); - return EXIT_FAILURE; - } - - if (!inconv) { - // probe the input to find a file format - for (Converter *conv : qAsConst(*availableConverters)) { - if (conv->directions() & Converter::In && conv->probeFile(&input)) { - inconv = conv; - break; - } - } - - if (!inconv) { - fprintf(stderr, "Could not determine input format. pass -I option.\n"); - return EXIT_FAILURE; - } - } - - if (!outconv) { - // probe the output to find a file format - for (Converter *conv : qAsConst(*availableConverters)) { - if (conv->directions() & Converter::Out && conv->probeFile(&output)) { - outconv = conv; - break; - } - } - } - - // now finally perform the conversion + // Now finally perform the conversion: QVariant data = inconv->loadFile(&input, outconv); - Q_ASSERT_X(outconv, "Converter Tool", + Q_ASSERT_X(outconv, "Serialization Converter", "Internal error: converter format did not provide default"); outconv->saveFile(&output, data, parser.values(optionOption)); return EXIT_SUCCESS; +//! [2] } |