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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QQMLJSSOURCELOCATION_P_H
#define QQMLJSSOURCELOCATION_P_H
#include <QtCore/private/qglobal_p.h>
#include <QtCore/qhashfunctions.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.
//
QT_BEGIN_NAMESPACE
namespace QQmlJS {
class SourceLocation
{
public:
explicit SourceLocation(quint32 offset = 0, quint32 length = 0, quint32 line = 0, quint32 column = 0)
: offset(offset), length(length),
startLine(line), startColumn(column)
{ }
bool isValid() const { return *this != SourceLocation(); }
quint32 begin() const { return offset; }
quint32 end() const { return offset + length; }
// Returns a zero length location at the start of the current one.
SourceLocation startZeroLengthLocation() const
{
return SourceLocation(offset, 0, startLine, startColumn);
}
// Returns a zero length location at the end of the current one.
SourceLocation endZeroLengthLocation(QStringView text) const
{
quint32 i = offset;
quint32 endLine = startLine;
quint32 endColumn = startColumn;
while (i < end()) {
QChar c = text.at(i);
switch (c.unicode()) {
case '\n':
if (i + 1 < end() && text.at(i + 1) == QLatin1Char('\r'))
++i;
Q_FALLTHROUGH();
case '\r':
++endLine;
endColumn = 1;
break;
default:
++endColumn;
}
++i;
}
return SourceLocation(offset + length, 0, endLine, endColumn);
}
// attributes
// ### encode
quint32 offset;
quint32 length;
quint32 startLine;
quint32 startColumn;
friend size_t qHash(const SourceLocation &location, size_t seed = 0)
{
return qHashMulti(seed, location.offset, location.length,
location.startLine, location.startColumn);
}
friend bool operator==(const SourceLocation &a, const SourceLocation &b)
{
return a.offset == b.offset && a.length == b.length
&& a.startLine == b.startLine && a.startColumn == b.startColumn;
}
friend bool operator!=(const SourceLocation &a, const SourceLocation &b) { return !(a == b); }
// Returns a source location starting at the beginning of l1, l2 and ending at the end of them.
// Ignores invalid source locations.
friend SourceLocation combine(const SourceLocation &l1, const SourceLocation &l2) {
quint32 e = qMax(l1.end(), l2.end());
SourceLocation res;
if (l1.offset <= l2.offset)
res = (l1.isValid() ? l1 : l2);
else
res = (l2.isValid() ? l2 : l1);
res.length = e - res.offset;
return res;
}
};
} // namespace QQmlJS
QT_END_NAMESPACE
#endif
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