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/****************************************************************************
**
** Copyright (C) 2018 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
** 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 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.
**
****************************************************************************/
#pragma once
#include "filesysteminterface.h"
#include "modifiedtimecheckerinterface.h"
#include "set_algorithm.h"
#include <algorithm>
#include <iterator>
namespace ClangBackEnd {
template<typename SourceEntries = ::ClangBackEnd::SourceEntries>
class ModifiedTimeChecker final : public ModifiedTimeCheckerInterface<SourceEntries>
{
using SourceEntry = typename SourceEntries::value_type;
public:
ModifiedTimeChecker(FileSystemInterface &fileSystem)
: m_fileSystem(fileSystem)
{}
bool isUpToDate(const SourceEntries &sourceEntries) const
{
if (sourceEntries.empty())
return false;
updateCurrentSourceTimeStamps(sourceEntries);
return compareEntries(sourceEntries) && notReseted(sourceEntries);
}
void pathsChanged(const FilePathIds &filePathIds) override
{
std::set_intersection(m_currentSourceTimeStamps.begin(),
m_currentSourceTimeStamps.end(),
filePathIds.begin(),
filePathIds.end(),
make_iterator([&](SourceTimeStamp &sourceTimeStamp) {
sourceTimeStamp.timeStamp = m_fileSystem.lastModified(
sourceTimeStamp.sourceId);
}));
}
void reset(const FilePathIds &filePathIds)
{
FilePathIds newResetFilePathIds;
newResetFilePathIds.reserve(newResetFilePathIds.size() + m_resetFilePathIds.size());
std::set_union(m_resetFilePathIds.begin(),
m_resetFilePathIds.end(),
filePathIds.begin(),
filePathIds.end(),
std::back_inserter(newResetFilePathIds));
m_resetFilePathIds = std::move(newResetFilePathIds);
}
private:
bool compareEntries(const SourceEntries &sourceEntries) const
{
return set_intersection_compare(
m_currentSourceTimeStamps.begin(),
m_currentSourceTimeStamps.end(),
sourceEntries.begin(),
sourceEntries.end(),
[](auto first, auto second) { return second.timeStamp > first.timeStamp; },
[](auto first, auto second) { return first.sourceId < second.sourceId; });
}
void updateCurrentSourceTimeStamps(const SourceEntries &sourceEntries) const
{
SourceTimeStamps sourceTimeStamps = newSourceTimeStamps(sourceEntries);
auto split = sourceTimeStamps.insert(sourceTimeStamps.end(),
m_currentSourceTimeStamps.begin(),
m_currentSourceTimeStamps.end());
std::inplace_merge(sourceTimeStamps.begin(), split, sourceTimeStamps.end());
m_currentSourceTimeStamps = std::move(sourceTimeStamps);
}
SourceTimeStamps newSourceTimeStamps(const SourceEntries &sourceEntries) const
{
SourceTimeStamps newTimeStamps;
newTimeStamps.reserve(sourceEntries.size());
std::set_difference(sourceEntries.begin(),
sourceEntries.end(),
m_currentSourceTimeStamps.begin(),
m_currentSourceTimeStamps.end(),
make_iterator([&](const SourceEntry &sourceEntry) {
newTimeStamps.emplace_back(sourceEntry.sourceId,
m_fileSystem.lastModified(
sourceEntry.sourceId));
}),
[](auto first, auto second) {
return first.sourceId < second.sourceId && first.timeStamp > 0;
});
return newTimeStamps;
}
bool notReseted(const SourceEntries &sourceEntries) const
{
auto oldSize = m_resetFilePathIds.size();
FilePathIds newResetFilePathIds;
newResetFilePathIds.reserve(newResetFilePathIds.size());
std::set_difference(m_resetFilePathIds.begin(),
m_resetFilePathIds.end(),
sourceEntries.begin(),
sourceEntries.end(),
std::back_inserter(newResetFilePathIds));
m_resetFilePathIds = std::move(newResetFilePathIds);
return oldSize == m_resetFilePathIds.size();
}
private:
mutable SourceTimeStamps m_currentSourceTimeStamps;
mutable FilePathIds m_resetFilePathIds;
FileSystemInterface &m_fileSystem;
};
} // namespace ClangBackEnd
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