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// Select one of the scenarios below

#define SCENARIO 1

#if SCENARIO == 1

// this is the "no harm done" version. Only operator% is active,

// with NO_CAST * defined

#define P %

#undef QT_USE_FAST_OPERATOR_PLUS

#undef QT_USE_FAST_CONCATENATION

#define QT_NO_CAST_FROM_ASCII

#define QT_NO_CAST_TO_ASCII

#endif

#if SCENARIO == 2

// this is the "full" version. Operator+ is replaced by a QStringBuilder

// based version

// with NO_CAST * defined

#define P +

#define QT_USE_FAST_OPERATOR_PLUS

#define QT_USE_FAST_CONCATENATION

#define QT_NO_CAST_FROM_ASCII

#define QT_NO_CAST_TO_ASCII

#endif

#if SCENARIO == 3

// this is the "no harm done" version. Only operator% is active,

// with NO_CAST * _not_ defined

#define P %

#undef QT_USE_FAST_OPERATOR_PLUS

#undef QT_USE_FAST_CONCATENATION

#undef QT_NO_CAST_FROM_ASCII

#undef QT_NO_CAST_TO_ASCII

#endif

#if SCENARIO == 4

// this is the "full" version. Operator+ is replaced by a QStringBuilder

// based version

// with NO_CAST * _not_ defined

#define P +

#define QT_USE_FAST_OPERATOR_PLUS

#define QT_USE_FAST_CONCATENATION

#undef QT_NO_CAST_FROM_ASCII

#undef QT_NO_CAST_TO_ASCII

#endif

#include <qbytearray.h>

#include <qdebug.h>

#include <qstring.h>

#include <qstringbuilder.h>

#include <qtest.h>

#include <string>

#define COMPARE(a, b) QCOMPARE(a, b)

//#define COMPARE(a, b)

#define SEP(s) qDebug() << "\n\n-------- " s "  ---------";

#define LITERAL "some string literal"

class tst_qstringbuilder : public QObject

{

    Q_OBJECT

public:

    tst_qstringbuilder()

      : l1literal(LITERAL),

        l1string(LITERAL),

        ba(LITERAL),

        string(l1string),

        stdstring(LITERAL),

        stringref(&string, 2, 10),

        achar('c'),

        r2(QLatin1String(LITERAL LITERAL)),

        r3(QLatin1String(LITERAL LITERAL LITERAL)),

        r4(QLatin1String(LITERAL LITERAL LITERAL LITERAL)),

        r5(QLatin1String(LITERAL LITERAL LITERAL LITERAL LITERAL))

    {}

public:

    enum { N = 10000 };

    int run_traditional()

    {

        int s = 0;

        for (int i = 0; i < N; ++i) {

#if 0

            s += QString(l1string + l1string).size();

            s += QString(l1string + l1string + l1string).size();

            s += QString(l1string + l1string + l1string + l1string).size();

            s += QString(l1string + l1string + l1string + l1string + l1string).size();

#endif

            s += QString(achar + l1string + achar).size();

        }

        return s;

    }

    int run_builder()

    {

        int s = 0;

        for (int i = 0; i < N; ++i) {

#if 0

            s += QString(l1literal P l1literal).size();

            s += QString(l1literal P l1literal P l1literal).size();

            s += QString(l1literal P l1literal P l1literal P l1literal).size();

            s += QString(l1literal P l1literal P l1literal P l1literal P l1literal).size();

#endif

            s += QString(achar % l1literal % achar).size();

        }

        return s;

    }

private slots:

    void separator_0() {

        qDebug() << "\nIn each block the QStringBuilder based result appear first "

            "(with a 'b_' prefix), QStringBased second ('q_' prefix), std::string "

            "last ('s_' prefix)\n";

    }

    void separator_1() { SEP("literal + literal  (builder first)"); }

    void b_2_l1literal() {

        QBENCHMARK { r = l1literal P l1literal; }

        COMPARE(r, r2);

    }

    #ifndef QT_NO_CAST_FROM_ASCII

    void b_l1literal_LITERAL() {

        QBENCHMARK { r = l1literal P LITERAL; }

        COMPARE(r, r2);

    }

    #endif

    void q_2_l1string() {

        QBENCHMARK { r = l1string + l1string; }

        COMPARE(r, r2);

    }

    void separator_2() { SEP("2 strings"); }

    void b_2_string() {

        QBENCHMARK { r = string P string; }

        COMPARE(r, r2);

    }

    void q_2_string() {

        QBENCHMARK { r = string + string; }

        COMPARE(r, r2);

    }

    void s_2_string() {

        QBENCHMARK { stdr = stdstring + stdstring; }

        COMPARE(stdr, stdstring + stdstring);

    }

    void separator_2c() { SEP("2 string refs"); }

    void b_2_stringref() {

        QBENCHMARK { r = stringref % stringref; }

        COMPARE(r, QString(stringref.toString() + stringref.toString()));

    }

    void q_2_stringref() {

        QBENCHMARK { r = stringref.toString() + stringref.toString(); }

        COMPARE(r, QString(stringref % stringref));

    }

    void separator_2b() { SEP("3 strings"); }

    void b_3_string() {

        QBENCHMARK { r = string P string P string; }

        COMPARE(r, r3);

    }

    void q_3_string() {

        QBENCHMARK { r = string + string + string; }

        COMPARE(r, r3);

    }

    void s_3_string() {

        QBENCHMARK { stdr = stdstring + stdstring + stdstring; }

        COMPARE(stdr, stdstring + stdstring + stdstring);

    }

    void separator_2e() { SEP("4 strings"); }

    void b_4_string() {

        QBENCHMARK { r = string P string P string P string; }

        COMPARE(r, r4);

    }

    void q_4_string() {

        QBENCHMARK { r = string + string + string + string; }

        COMPARE(r, r4);

    }

    void s_4_string() {

        QBENCHMARK { stdr = stdstring + stdstring + stdstring + stdstring; }

        COMPARE(stdr, stdstring + stdstring + stdstring + stdstring);

    }

    void separator_2a() { SEP("string + literal  (builder first)"); }

    void b_string_l1literal() {

        QBENCHMARK { r = string % l1literal; }

        COMPARE(r, r2);

    }

    #ifndef QT_NO_CAST_FROM_ASCII

    void b_string_LITERAL() {

        QBENCHMARK { r = string P LITERAL; }

        COMPARE(r, r2);

    }

    void b_LITERAL_string() {

        QBENCHMARK { r = LITERAL P string; }

        COMPARE(r, r2);

    }

    #endif

    void b_string_l1string() {

        QBENCHMARK { r = string P l1string; }

        COMPARE(r, r2);

    }

    void q_string_l1literal() {

        QBENCHMARK { r = string + l1string; }

        COMPARE(r, r2);

    }

    void q_string_l1string() {

        QBENCHMARK { r = string + l1string; }

        COMPARE(r, r2);

    }

    void s_LITERAL_string() {

        QBENCHMARK { stdr = LITERAL + stdstring; }

        COMPARE(stdr, stdstring + stdstring);

    }

    void separator_3() { SEP("3 literals"); }

    void b_3_l1literal() {

        QBENCHMARK { r = l1literal P l1literal P l1literal; }

        COMPARE(r, r3);

    }

    void q_3_l1string() {

        QBENCHMARK { r = l1string + l1string + l1string; }

        COMPARE(r, r3);

    }

    void s_3_l1string() {

        QBENCHMARK { stdr = stdstring + LITERAL + LITERAL; }

        COMPARE(stdr, stdstring + stdstring + stdstring);

    }

    void separator_4() { SEP("4 literals"); }

    void b_4_l1literal() {

        QBENCHMARK { r = l1literal P l1literal P l1literal P l1literal; }

        COMPARE(r, r4);

    }

    void q_4_l1string() {

        QBENCHMARK { r = l1string + l1string + l1string + l1string; }

        COMPARE(r, r4);

    }

    void separator_5() { SEP("5 literals"); }

    void b_5_l1literal() {

        QBENCHMARK { r = l1literal P l1literal P l1literal P l1literal P l1literal; }

        COMPARE(r, r5);

    }

    void q_5_l1string() {

        QBENCHMARK { r = l1string + l1string + l1string + l1string + l1string; }

        COMPARE(r, r5);

    }

    void separator_6() { SEP("4 chars"); }

    void b_string_4_char() {

        QBENCHMARK { r = string + achar + achar + achar + achar; }

        COMPARE(r, QString(string P achar P achar P achar P achar));

    }

    void q_string_4_char() {

        QBENCHMARK { r = string + achar + achar + achar + achar; }

        COMPARE(r, QString(string P achar P achar P achar P achar));

    }

    void s_string_4_char() {

        QBENCHMARK { stdr = stdstring + 'c' + 'c' + 'c' + 'c'; }

        COMPARE(stdr, stdstring + 'c' + 'c' + 'c' + 'c');

    }

    void separator_7() { SEP("char + string + char"); }

    void b_char_string_char() {

        QBENCHMARK { r = achar + string + achar; }

        COMPARE(r, QString(achar P string P achar));

    }

    void q_char_string_char() {

        QBENCHMARK { r = achar + string + achar; }

        COMPARE(r, QString(achar P string P achar));

    }

    void s_char_string_char() {

        QBENCHMARK { stdr = 'c' + stdstring + 'c'; }

        COMPARE(stdr, 'c' + stdstring + 'c');

    }

    void separator_8() { SEP("string.arg"); }

    void b_string_arg() {

        const QString pattern = l1string + QString::fromLatin1("%1") + l1string;

        QBENCHMARK { r = l1literal P string P l1literal; }

        COMPARE(r, r3);

    }

    void q_string_arg() {

        const QString pattern = l1string + QLatin1String("%1") + l1string;

        QBENCHMARK { r = pattern.arg(string); }

        COMPARE(r, r3);

    }

    void q_bytearray_arg() {

        QByteArray result;

        QBENCHMARK { result = ba + ba + ba; }

    }

    void separator_9() { SEP("QString::reserve()"); }

    void b_reserve() {

        QBENCHMARK {

            r.clear();

            r = string P string P string P string;

        }

        COMPARE(r, r4);

    }

    void b_reserve_lit() {

        QBENCHMARK {

            r.clear();

            r = string P l1literal P string P string;

        }

        COMPARE(r, r4);

    }

    void s_reserve() {

        QBENCHMARK {

            r.clear();

            r.reserve(string.size() + string.size() + string.size() + string.size());

            r += string;

            r += string;

            r += string;

            r += string;

        }

        COMPARE(r, r4);

    }

    void s_reserve_lit() {

        QBENCHMARK {

            r.clear();

            //r.reserve(string.size() + qstrlen(l1string.latin1())

            //    + string.size() + string.size());

            r.reserve(1024);

            r += string;

            r += l1string;

            r += string;

            r += string;

        }

        COMPARE(r, r4);

    }

private:

    const QLatin1Literal l1literal;

    const QLatin1String l1string;

    const QByteArray ba;

    const QString string;

    const std::string stdstring;

    const QStringRef stringref;

    const QLatin1Char achar;

    const QString r2, r3, r4, r5;

    // short cuts for results

    QString r;

    std::string stdr;

};

//void operator%(QString, int) {}

int main(int argc, char *argv[])

{

    //qDebug() << (QString("xx") * QLatin1String("y")).toString();

    //42 % 3; // Sanity test, should always work.

    //QString("x") % 2; // Sanity test, should only compile when the 

    // operator%(QString, int) is visible.

    if (argc == 2 && (QLatin1String(argv[1]) == QLatin1String("--run-builder")

                   || QLatin1String(argv[1]) == QLatin1String("-b"))) {

        tst_qstringbuilder test;

        return test.run_builder();

    }

    if (argc == 2 && (QLatin1String(argv[1]) == QLatin1String("--run-traditional")

                   || QLatin1String(argv[1]) == QLatin1String("-t"))) {

        tst_qstringbuilder test;

        return test.run_traditional();

    }

    if (argc == 1) {

        QCoreApplication app(argc, argv);

        QStringList args = app.arguments();

        tst_qstringbuilder test;

        return QTest::qExec(&test, argc, argv);

    }

    qDebug() << "Usage: " << argv[0] << " [--run-builder|-r|--run-traditional|-t]";

}

#include "main.moc"