Utils: move line column parsing again

This will allow us to just parse the postfix without fileName
extraction.

Change-Id: Ied6b80f25078473e2b91ced68913205a17f9068e
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/libs/utils/linecolumn.cpp

@@ -0,0 +1,68 @@
+/****************************************************************************
+**
+** Copyright (C) 2021 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
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+** 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 General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** 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-3.0.html.
+**
+****************************************************************************/
+
+#include "linecolumn.h"
+
+#include <QRegularExpression>
+
+namespace Utils {
+
+/*!
+    Returns the line and column of a \a fileName and sets the \a postfixPos if
+    it can find a positional postfix.
+
+    The following patterns are supported: \c {filepath.txt:19},
+    \c{filepath.txt:19:12}, \c {filepath.txt+19},
+    \c {filepath.txt+19+12}, and \c {filepath.txt(19)}.
+*/
+
+LineColumn LineColumn::extractFromFileName(const QString &fileName, int &postfixPos)
+{
+    static const auto regexp = QRegularExpression("[:+](\\d+)?([:+](\\d+)?)?$");
+    // (10) MSVC-style
+    static const auto vsRegexp = QRegularExpression("[(]((\\d+)[)]?)?$");
+    const QRegularExpressionMatch match = regexp.match(fileName);
+    QString filePath = fileName;
+    LineColumn lineColumn;
+    if (match.hasMatch()) {
+        postfixPos = match.capturedStart(0);
+        filePath = fileName.left(match.capturedStart(0));
+        lineColumn.line = 0; // for the case that there's only a : at the end
+        if (match.lastCapturedIndex() > 0) {
+            lineColumn.line = match.captured(1).toInt();
+            if (match.lastCapturedIndex() > 2) // index 2 includes the + or : for the column number
+                lineColumn.column = match.captured(3).toInt() - 1; //column is 0 based, despite line being 1 based
+        }
+    } else {
+        const QRegularExpressionMatch vsMatch = vsRegexp.match(fileName);
+        postfixPos = match.capturedStart(0);
+        filePath = fileName.left(vsMatch.capturedStart(0));
+        if (vsMatch.lastCapturedIndex() > 1) // index 1 includes closing )
+            lineColumn.line = vsMatch.captured(2).toInt();
+    }
+    return lineColumn;
+}
+
+} // namespace Utils