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/****************************************************************************
**
** Copyright (C) 2017 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.
**
****************************************************************************/
#include "filestatuscache.h"
#include "filesystem.h"
#include <utils/algorithm.h>
#include <QDateTime>
#include <QFileInfo>
namespace ClangBackEnd {
long long FileStatusCache::lastModifiedTime(FilePathId filePathId) const
{
return findEntry(filePathId).lastModified;
}
void FileStatusCache::update(FilePathId filePathId)
{
auto found = std::lower_bound(m_cacheEntries.begin(),
m_cacheEntries.end(),
Internal::FileStatusCacheEntry{filePathId},
[] (const auto &first, const auto &second) {
return first.filePathId < second.filePathId;
});
if (found != m_cacheEntries.end() && found->filePathId == filePathId)
found->lastModified = m_fileSystem.lastModified(filePathId);
}
namespace {
template<class InputIt1, class InputIt2, class Callable>
void set_intersection_call(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, Callable callable)
{
while (first1 != last1 && first2 != last2) {
if (*first1 < *first2) {
++first1;
} else {
if (!(*first2 < *first1))
callable(*first1++);
++first2;
}
}
}
template<class InputIt1, class InputIt2, class Callable>
void set_difference_call(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, Callable callable)
{
while (first1 != last1) {
if (first2 == last2) {
std::for_each(first1, last1, callable);
return;
}
if (*first1 < *first2) {
callable(*first1++);
} else {
if (!(*first2 < *first1))
++first1;
++first2;
}
}
}
} // namespace
void FileStatusCache::update(FilePathIds filePathIds)
{
set_intersection_call(m_cacheEntries.begin(),
m_cacheEntries.end(),
filePathIds.begin(),
filePathIds.end(),
[&](auto &entry) {
entry.lastModified = m_fileSystem.lastModified(entry.filePathId);
});
}
FilePathIds FileStatusCache::modified(FilePathIds filePathIds) const
{
FilePathIds modifiedFilePathIds;
modifiedFilePathIds.reserve(filePathIds.size());
set_intersection_call(m_cacheEntries.begin(),
m_cacheEntries.end(),
filePathIds.begin(),
filePathIds.end(),
[&](auto &entry) {
auto newLastModified = m_fileSystem.lastModified(entry.filePathId);
if (newLastModified > entry.lastModified) {
modifiedFilePathIds.push_back(entry.filePathId);
entry.lastModified = newLastModified;
}
});
Internal::FileStatusCacheEntries newEntries;
newEntries.reserve(filePathIds.size());
set_difference_call(filePathIds.begin(),
filePathIds.end(),
m_cacheEntries.begin(),
m_cacheEntries.end(),
[&](FilePathId newFilePathId) {
newEntries.emplace_back(newFilePathId,
m_fileSystem.lastModified(newFilePathId));
modifiedFilePathIds.push_back(newFilePathId);
});
if (newEntries.size()) {
Internal::FileStatusCacheEntries mergedEntries;
mergedEntries.reserve(m_cacheEntries.size() + newEntries.size());
std::set_union(newEntries.begin(),
newEntries.end(),
m_cacheEntries.begin(),
m_cacheEntries.end(),
std::back_inserter(mergedEntries));
m_cacheEntries = std::move(mergedEntries);
}
std::sort(modifiedFilePathIds.begin(), modifiedFilePathIds.end());
return modifiedFilePathIds;
}
FileStatusCache::size_type FileStatusCache::size() const
{
return m_cacheEntries.size();
}
Internal::FileStatusCacheEntry FileStatusCache::findEntry(FilePathId filePathId) const
{
auto found = std::lower_bound(m_cacheEntries.begin(),
m_cacheEntries.end(),
Internal::FileStatusCacheEntry{filePathId},
[] (const auto &first, const auto &second) {
return first.filePathId < second.filePathId;
});
if (found != m_cacheEntries.end() && found->filePathId == filePathId)
return *found;
auto inserted = m_cacheEntries.emplace(found, filePathId, m_fileSystem.lastModified(filePathId));
return *inserted;
}
} // namespace ClangBackEnd
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