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Diffstat (limited to 'src/qmldom/qqmldomstringdumper_p.h')
| -rw-r--r-- | src/qmldom/qqmldomstringdumper_p.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/qmldom/qqmldomstringdumper_p.h b/src/qmldom/qqmldomstringdumper_p.h new file mode 100644 index 0000000000..7669bfc882 --- /dev/null +++ b/src/qmldom/qqmldomstringdumper_p.h @@ -0,0 +1,152 @@ +/**************************************************************************** +** +** Copyright (C) 2020 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the QtQml module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +**/ +#ifndef DUMPER_H +#define DUMPER_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 "qqmldom_global.h" +#include "qqmldomconstants_p.h" + +#include <QtCore/QString> +#include <QtCore/QStringView> +#include <QtCore/QDebug> + +#include <type_traits> + +QT_BEGIN_NAMESPACE + +namespace QQmlJS { +namespace Dom { + +using Sink = std::function<void(QStringView)>; +using DumperFunction = std::function<void(Sink)>; + +class Dumper{ +public: + DumperFunction dumper; +private: + // We want to avoid the limit of one user conversion: + // after doing (* -> QStringView) we cannot have QStringView -> Dumper, as it + // would be the second user defined conversion. + // For a similar reason we have a template to accept function<void(Sink)> . + // The end result is that void f(Dumper) can be called nicely, and avoid overloads: + // f(u"bla"), f(QLatin1String("bla")), f(QString()), f([](Sink s){...}),... + template <typename T> + using if_compatible_dumper = typename + std::enable_if<std::is_convertible<T, DumperFunction>::value, bool>::type; + + template<typename T> + using if_string_view_convertible = typename + std::enable_if<std::is_convertible_v<T, QStringView>, bool>::type; + +public: + Dumper(QStringView s): + dumper([s](Sink sink){ sink(s); }) {} + + Dumper(std::nullptr_t): Dumper(QStringView(nullptr)) {} + + template <typename Stringy, if_string_view_convertible<Stringy> = true> + Dumper(Stringy string): + Dumper(QStringView(string)) {} + + template <typename U, if_compatible_dumper<U> = true> + Dumper(U f): dumper(f) {} + + void operator()(Sink s) { dumper(s); } +}; + +template <typename T> +void sinkInt(Sink s, T i) { + const int BUFSIZE = 42; // safe up to 128 bits + QChar buf[BUFSIZE]; + int ibuf = BUFSIZE; + buf[--ibuf] = QChar(0); + bool neg = false; + if (i < 0) + neg=true; + int digit = i % 10; + i = i / 10; + if constexpr (std::is_signed_v<T>) { + if (neg) { // we change the sign here because -numeric_limits<T>::min() == numeric_limits<T>::min() + i = -i; + digit = - digit; + } + } + buf[--ibuf] = QChar::fromLatin1('0' + digit); + while (i > 0 && ibuf > 0) { + digit = i % 10; + buf[--ibuf] = QChar::fromLatin1('0' + digit); + i = i / 10; + } + if (neg && ibuf > 0) + buf[--ibuf] = QChar::fromLatin1('-'); + s(QStringView(&buf[ibuf], BUFSIZE - ibuf -1)); +} + +QMLDOM_EXPORT QString dumperToString(Dumper writer); + +QMLDOM_EXPORT void sinkEscaped(Sink sink, QStringView s, + EscapeOptions options = EscapeOptions::OuterQuotes); + +inline void devNull(QStringView) {} + +QMLDOM_EXPORT void sinkIndent(Sink s, int indent); + +QMLDOM_EXPORT void sinkNewline(Sink s, int indent = 0); + +QMLDOM_EXPORT void dumpErrorLevel(Sink s, ErrorLevel level); + +QMLDOM_EXPORT void dumperToQDebug(Dumper dumper, QDebug debug); + +QMLDOM_EXPORT void dumperToQDebug(Dumper dumper, ErrorLevel level = ErrorLevel::Debug); + +} // end namespace Dom +} // end namespace QQmlJS +QT_END_NAMESPACE + +#endif // DUMPER_H |