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// 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.length() - 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.length())
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.length())
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.length();
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
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