1 files changed, 82 insertions, 0 deletions
diff --git a/src/tools/shared/shellquote_shared.h b/src/tools/shared/shellquote_shared.h
new file mode 100644
index 0000000000..7a9ab691da
--- /dev/null
+++ b/src/tools/shared/shellquote_shared.h
@@ -0,0 +1,82 @@
+// Copyright (C) 2022 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef SHELLQUOTE_SHARED_H
+#define SHELLQUOTE_SHARED_H
+
+#include <QDir>
+#include <QRegularExpression>
+#include <QString>
+
+// Copy-pasted from qmake/library/ioutil.cpp
+inline static bool hasSpecialChars(const QString &arg, const uchar (&iqm)[16])
+{
+    for (int x = arg.size() - 1; x >= 0; --x) {
+        ushort c = arg.unicode()[x].unicode();
+        if ((c < sizeof(iqm) * 8) && (iqm[c / 8] & (1 << (c & 7))))
+            return true;
+    }
+    return false;
+}
+
+static QString shellQuoteUnix(const QString &arg)
+{
+    // Chars that should be quoted (TM). This includes:
+    static const uchar iqm[] = {
+        0xff, 0xff, 0xff, 0xff, 0xdf, 0x07, 0x00, 0xd8,
+        0x00, 0x00, 0x00, 0x38, 0x01, 0x00, 0x00, 0x78
+    }; // 0-32 \'"$`<>|;&(){}*?#!~[]
+
+    if (!arg.size())
+        return QLatin1String("\"\"");
+
+    QString ret(arg);
+    if (hasSpecialChars(ret, iqm)) {
+        ret.replace(QLatin1Char('\''), QLatin1String("'\\''"));
+        ret.prepend(QLatin1Char('\''));
+        ret.append(QLatin1Char('\''));
+    }
+    return ret;
+}
+
+static QString shellQuoteWin(const QString &arg)
+{
+    // Chars that should be quoted (TM). This includes:
+    // - control chars & space
+    // - the shell meta chars "&()<>^|
+    // - the potential separators ,;=
+    static const uchar iqm[] = {
+        0xff, 0xff, 0xff, 0xff, 0x45, 0x13, 0x00, 0x78,
+        0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x10
+    };
+
+    if (!arg.size())
+        return QLatin1String("\"\"");
+
+    QString ret(arg);
+    if (hasSpecialChars(ret, iqm)) {
+        // Quotes are escaped and their preceding backslashes are doubled.
+        // It's impossible to escape anything inside a quoted string on cmd
+        // level, so the outer quoting must be "suspended".
+        ret.replace(QRegularExpression(QLatin1String("(\\\\*)\"")), QLatin1String("\"\\1\\1\\^\"\""));
+        // The argument must not end with a \ since this would be interpreted
+        // as escaping the quote -- rather put the \ behind the quote: e.g.
+        // rather use "foo"\ than "foo\"
+        int i = ret.size();
+        while (i > 0 && ret.at(i - 1) == QLatin1Char('\\'))
+            --i;
+        ret.insert(i, QLatin1Char('"'));
+        ret.prepend(QLatin1Char('"'));
+    }
+    return ret;
+}
+
+static QString shellQuote(const QString &arg)
+{
+    if (QDir::separator() == QLatin1Char('\\'))
+        return shellQuoteWin(arg);
+    else
+        return shellQuoteUnix(arg);
+}
+
+#endif // SHELLQUOTE_SHARED_H