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#include <QtTest/QtTest>

#ifdef Q_OS_WIN

#   include <windows.h>

#else

#   include <sys/stat.h>

#   include <sys/types.h>

#   include <dirent.h>

#   include <unistd.h>

#endif

class Test : public QObject{

  Q_OBJECT

public slots:

    void initTestCase() {

        QDir testdir = QDir::tempPath();

        const QString subfolder_name = QLatin1String("test_speed");

        QVERIFY(testdir.mkdir(subfolder_name));

        QVERIFY(testdir.cd(subfolder_name));

        for (uint i=0; i<10000; ++i) {

            QFile file(testdir.absolutePath() + "/testfile_" + QString::number(i));

            file.open(QIODevice::WriteOnly);

        }

    }

    void cleanupTestCase() {

        {

            QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

            testdir.setSorting(QDir::Unsorted);

            testdir.setFilter(QDir::AllEntries | QDir::System | QDir::Hidden);

            foreach (const QString &filename, testdir.entryList()) {

                testdir.remove(filename);

            }

        }

        const QDir temp = QDir(QDir::tempPath());

        temp.rmdir(QLatin1String("test_speed"));

    }

private slots:

    void baseline() {}

    void sizeSpeed() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        QBENCHMARK {

            QFileInfoList fileInfoList = testdir.entryInfoList(QDir::Files, QDir::Unsorted);

            foreach (const QFileInfo &fileInfo, fileInfoList) {

                fileInfo.isDir();

                fileInfo.size();

            }

        }

    }

    void sizeSpeedIterator() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        QBENCHMARK {

            QDirIterator dit(testdir.path(), QDir::Files);

            while (dit.hasNext()) {

                dit.fileInfo().isDir();

                dit.fileInfo().size();

                dit.next();

            }

        }

    }

    void sizeSpeedWithoutFilter() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        QBENCHMARK {

            QFileInfoList fileInfoList = testdir.entryInfoList(QDir::NoFilter, QDir::Unsorted);

            foreach (const QFileInfo &fileInfo, fileInfoList) {

                fileInfo.size();

            }

        }

    }

    void sizeSpeedWithoutFilterIterator() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        QBENCHMARK {

            QDirIterator dit(testdir.path());

            while (dit.hasNext()) {

                dit.fileInfo().isDir();

                dit.fileInfo().size();

                dit.next();

            }

        }

    }

    void sizeSpeedWithoutFileInfoList() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        testdir.setSorting(QDir::Unsorted);

        QBENCHMARK {

            QStringList fileList = testdir.entryList(QDir::NoFilter, QDir::Unsorted);

            foreach (const QString &filename, fileList) {

                QFileInfo fileInfo(filename);

                fileInfo.size();

            }

        }

    }

    void iDontWantAnyStat() {

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        testdir.setSorting(QDir::Unsorted);

        testdir.setFilter(QDir::AllEntries | QDir::System | QDir::Hidden);

        QBENCHMARK {

            QStringList fileList = testdir.entryList(QDir::NoFilter, QDir::Unsorted);

            foreach (const QString &filename, fileList) {

            }

        }

    }

    void iDontWantAnyStatIterator() {

        QBENCHMARK {

            QDirIterator dit(QDir::tempPath() + QLatin1String("/test_speed"));

            while (dit.hasNext()) {

                dit.next();

            }

        }

    }

    void sizeSpeedWithoutFilterLowLevel() {

#ifdef Q_OS_WIN

        const wchar_t *dirpath = (wchar_t*)testdir.absolutePath().utf16();

        wchar_t appendedPath[MAX_PATH];

        wcscpy(appendedPath, dirpath);

        wcscat(appendedPath, L"\\*");

        WIN32_FIND_DATA fd;

        HANDLE hSearch = FindFirstFileW(appendedPath, &fd);

        QVERIFY(hSearch == INVALID_HANDLE_VALUE);

        QBENCHMARK {

            do {

            } while (FindNextFile(hSearch, &fd));

        }

        FindClose(hSearch);

#else

        QDir testdir(QDir::tempPath() + QLatin1String("/test_speed"));

        DIR *dir = opendir(qPrintable(testdir.absolutePath()));

        QVERIFY(dir);

        QVERIFY(!chdir(qPrintable(testdir.absolutePath())));

        QBENCHMARK {

            struct dirent *item = readdir(dir);

            while (item) {

                char *fileName = item->d_name;

                struct stat fileStat;

                QVERIFY(!stat(fileName, &fileStat));

                item = readdir(dir);

            }

        }

        closedir(dir);

#endif

    }

};

QTEST_MAIN(Test)

#include "tst_qdir.moc"