1 files changed, 304 insertions, 0 deletions
diff --git a/src/tools/tracegen/provider.cpp b/src/tools/tracegen/provider.cpp
new file mode 100644
index 0000000000..00e105377e
--- /dev/null
+++ b/src/tools/tracegen/provider.cpp
@@ -0,0 +1,304 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Rafael Roquetto <rafael.roquetto@kdab.com>
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the tools applications 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.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "provider.h"
+#include "panic.h"
+
+#include <qfile.h>
+#include <qfileinfo.h>
+#include <qtextstream.h>
+#include <qregexp.h>
+#include <qstring.h>
+
+#ifdef TRACEGEN_DEBUG
+#include <qdebug.h>
+
+static void dumpTracepoint(const Tracepoint &t)
+{
+    qDebug() << "=== BEGIN TRACEPOINT ===";
+    qDebug() << "name:" << t.name;
+    qDebug() << "ARGS\n";
+
+    int j = 0;
+
+    for (auto i = t.args.constBegin(); i != t.args.constEnd(); ++i) {
+        qDebug() << "ARG[" << j << "] type:" << i->type;
+        qDebug() << "ARG[" << j << "] name:" << i->name;
+        qDebug() << "ARG[" << j << "] arrayLen:" << i->arrayLen;
+        ++j;
+    }
+
+    qDebug() << "\nFIELDS\n";
+
+    j = 0;
+
+    for (auto i = t.fields.constBegin(); i != t.fields.constEnd(); ++i) {
+        qDebug() << "FIELD[" << j << "] backend_type" << static_cast<int>(i->backendType);
+        qDebug() << "FIELD[" << j << "] param_type" << i->paramType;
+        qDebug() << "FIELD[" << j << "] name" << i->name;
+        qDebug() << "FIELD[" << j << "] arrayLen" << i->arrayLen;
+        qDebug() << "FIELD[" << j << "] seqLen" << i->seqLen;
+        ++j;
+    }
+
+    qDebug() << "=== END TRACEPOINT ===\n";
+
+}
+#endif
+
+static inline int arrayLength(const QString &rawType)
+{
+    /* matches the length of an ordinary array type
+     * Ex: foo[10] yields '10'
+     */
+    static const QRegExp rx(QStringLiteral(".*\\[([0-9]+)\\].*"));
+
+    if (!rx.exactMatch(rawType.trimmed()))
+        return 0;
+
+    return rx.cap(1).toInt();
+}
+
+static inline QString sequenceLength(const QString &rawType)
+{
+    /* matches the identifier pointing to length of a CTF sequence type, which is
+     * a dynamic sized array.
+     * Ex: in qcoreapplication_foo(const char[len], some_string, unsigned int, * len)
+     * it will match the 'len' part of 'const char[len]')
+     */
+    static const QRegExp rx(QStringLiteral(".*\\[([A-Za-z_][A-Za-z_0-9]*)\\].*"));
+
+    if (!rx.exactMatch(rawType.trimmed()))
+        return QString();
+
+    return rx.cap(1);
+}
+
+static QString decayArrayToPointer(QString type)
+{
+    /* decays an array to a pointer, i.e., if 'type' holds int[10],
+     * this function returns 'int *'
+     */
+    static QRegExp rx(QStringLiteral("\\[(.+)\\]"));
+
+    rx.setMinimal(true);
+    return type.replace(rx, QStringLiteral("*"));
+}
+
+static QString removeBraces(QString type)
+{
+    static const QRegExp rx(QStringLiteral("\\[.*\\]"));
+
+    return type.remove(rx);
+}
+
+static Tracepoint::Field::BackendType backendType(QString rawType)
+{
+    static const struct {
+        const char *type;
+        Tracepoint::Field::BackendType backendType;
+    } typeTable[] = {
+        { "bool",                   Tracepoint::Field::Integer },
+        { "short_int",              Tracepoint::Field::Integer },
+        { "signed_short",           Tracepoint::Field::Integer },
+        { "signed_short_int",       Tracepoint::Field::Integer },
+        { "unsigned_short",         Tracepoint::Field::Integer },
+        { "unsigned_short_int",     Tracepoint::Field::Integer },
+        { "int",                    Tracepoint::Field::Integer },
+        { "signed",                 Tracepoint::Field::Integer },
+        { "signed_int",             Tracepoint::Field::Integer },
+        { "unsigned",               Tracepoint::Field::Integer },
+        { "unsigned_int",           Tracepoint::Field::Integer },
+        { "long",                   Tracepoint::Field::Integer },
+        { "long_int",               Tracepoint::Field::Integer },
+        { "signed_long",            Tracepoint::Field::Integer },
+        { "signed_long_int",        Tracepoint::Field::Integer },
+        { "unsigned_long",          Tracepoint::Field::Integer },
+        { "unsigned_long_int",      Tracepoint::Field::Integer },
+        { "long_long",              Tracepoint::Field::Integer },
+        { "long_long_int",          Tracepoint::Field::Integer },
+        { "signed_long_long",       Tracepoint::Field::Integer },
+        { "signed_long_long_int",   Tracepoint::Field::Integer },
+        { "unsigned_long_long",     Tracepoint::Field::Integer },
+        { "char",                   Tracepoint::Field::Integer },
+        { "float",                  Tracepoint::Field::Float },
+        { "double",                 Tracepoint::Field::Float },
+        { "long_double",            Tracepoint::Field::Float },
+        { "char_ptr",               Tracepoint::Field::String },
+        { "QString",                Tracepoint::Field::QtString },
+        { "QByteArray",             Tracepoint::Field::QtByteArray },
+        { "QUrl",                   Tracepoint::Field::QtUrl },
+        { "QRect",                  Tracepoint::Field::QtRect }
+    };
+
+    auto backendType = [](const QString &rawType) {
+
+        static const size_t tableSize = sizeof (typeTable) / sizeof (typeTable[0]);
+
+        for (size_t i = 0; i < tableSize; ++i) {
+            if (rawType == QLatin1String(typeTable[i].type))
+                return typeTable[i].backendType;
+        }
+
+        return Tracepoint::Field::Unknown;
+    };
+
+    if (arrayLength(rawType) > 0)
+        return Tracepoint::Field::Array;
+
+    if (!sequenceLength(rawType).isNull())
+        return Tracepoint::Field::Sequence;
+
+    static const QRegExp constMatch(QStringLiteral("\\bconst\\b"));
+    rawType.remove(constMatch);
+    rawType.remove(QLatin1Char('&'));
+
+    static const QRegExp ptrMatch(QStringLiteral("\\s*\\*\\s*"));
+    rawType.replace(ptrMatch, QStringLiteral("_ptr"));
+    rawType = rawType.trimmed();
+    rawType.replace(QStringLiteral(" "), QStringLiteral("_"));
+
+    return backendType(rawType.trimmed());
+}
+
+static Tracepoint parseTracepoint(const QString &name, const QStringList &args,
+        const QString &fileName, const int lineNumber)
+{
+    Tracepoint t;
+    t.name = name;
+
+    if (args.isEmpty())
+        return t;
+
+    auto i = args.constBegin();
+    auto end = args.constEnd();
+    int argc = 0;
+
+    static const QRegExp rx(QStringLiteral("(.*)\\b([A-Za-z_][A-Za-z0-9_]*)$"));
+
+    while (i != end) {
+        rx.exactMatch(*i);
+
+        const QString type = rx.cap(1).trimmed();
+
+        if (type.isNull()) {
+            panic("Missing parameter type for argument %d of %s (%s:%d)",
+                    argc, qPrintable(name), qPrintable(fileName), lineNumber);
+        }
+
+        const QString name = rx.cap(2).trimmed();
+
+        if (name.isNull()) {
+            panic("Missing parameter name for argument %d of %s (%s:%d)",
+                    argc, qPrintable(name), qPrintable(fileName), lineNumber);
+        }
+
+        int arrayLen = arrayLength(type);
+
+        Tracepoint::Argument a;
+        a.arrayLen = arrayLen;
+        a.name = name;
+        a.type = decayArrayToPointer(type);
+
+        t.args << std::move(a);
+
+        Tracepoint::Field f;
+        f.backendType = backendType(type);
+        f.paramType = removeBraces(type);
+        f.name = name;
+        f.arrayLen = arrayLen;
+        f.seqLen = sequenceLength(type);
+
+        t.fields << std::move(f);
+
+        ++i;
+    }
+
+    return t;
+}
+
+Provider parseProvider(const QString &filename)
+{
+    QFile f(filename);
+
+    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
+        panic("Cannot open %s: %s", qPrintable(filename), qPrintable(f.errorString()));
+
+    QTextStream s(&f);
+
+    static const QRegExp tracedef(QStringLiteral("([A-Za-z][A-Za-z0-9_]*)\\((.*)\\)"));
+
+    int lineNumber = 0;
+
+    Provider provider;
+    provider.name = QFileInfo(filename).baseName();
+
+    for (;;) {
+        QString line = s.readLine().trimmed();
+
+        if (line.isNull())
+            break;
+
+        if (line.isEmpty() || line.startsWith(QStringLiteral("#"))) {
+            ++lineNumber;
+            continue;
+        }
+
+        if (tracedef.exactMatch(line)) {
+            const QString name = tracedef.cap(1);
+            QStringList args = tracedef.cap(2).split(QStringLiteral(","), QString::SkipEmptyParts);
+
+            if (args.at(0).isNull())
+                args.clear();
+
+            provider.tracepoints << parseTracepoint(name, args, filename, lineNumber);
+        } else {
+            panic("Syntax error whilre processing %s on line %d", qPrintable(filename), lineNumber);
+        }
+
+        ++lineNumber;
+    }
+
+#ifdef TRACEGEN_DEBUG
+    for (auto i = provider.tracepoints.constBegin(); i != provider.tracepoints.constEnd(); ++i)
+        dumpTracepoint(*i);
+#endif
+
+    return provider;
+}