From b6ba4ac00d1ea86bb1a735391f03fd6ea9e464b1 Mon Sep 17 00:00:00 2001 From: Allan Sandfeld Jensen Date: Tue, 25 Mar 2014 16:16:57 +0100 Subject: Unduplicate the implementations of next power of two Qtbase contains four identical implementations of next power of two, these should be shared and the implementation made available to other qt modules, as it is also used many places outside of qtbase. [ChangeLog][QtCore][QtMath] Introduced qNextPowerOfTwo methods. Change-Id: Id23fbe5ad6bae647b30d5a4212c0330e48a50278 Reviewed-by: Thiago Macieira --- tests/auto/corelib/kernel/qmath/tst_qmath.cpp | 119 ++++++++++++++++++++++++++ 1 file changed, 119 insertions(+) (limited to 'tests/auto/corelib/kernel/qmath') diff --git a/tests/auto/corelib/kernel/qmath/tst_qmath.cpp b/tests/auto/corelib/kernel/qmath/tst_qmath.cpp index 24934ac138..8d6964cbcd 100644 --- a/tests/auto/corelib/kernel/qmath/tst_qmath.cpp +++ b/tests/auto/corelib/kernel/qmath/tst_qmath.cpp @@ -54,6 +54,14 @@ private slots: void degreesToRadians(); void radiansToDegrees_data(); void radiansToDegrees(); + void qNextPowerOfTwo32S_data(); + void qNextPowerOfTwo32S(); + void qNextPowerOfTwo64S_data(); + void qNextPowerOfTwo64S(); + void qNextPowerOfTwo32U_data(); + void qNextPowerOfTwo32U(); + void qNextPowerOfTwo64U_data(); + void qNextPowerOfTwo64U(); }; void tst_QMath::fastSinCos() @@ -137,6 +145,117 @@ void tst_QMath::radiansToDegrees() QCOMPARE(qRadiansToDegrees(radiansDouble), degreesDouble); } + +void tst_QMath::qNextPowerOfTwo32S_data() +{ + QTest::addColumn("input"); + QTest::addColumn("output"); + + QTest::newRow("0") << 0 << 1U; + QTest::newRow("1") << 1 << 2U; + QTest::newRow("2") << 2 << 4U; + QTest::newRow("17") << 17 << 32U; + QTest::newRow("128") << 128 << 256U; + QTest::newRow("65535") << 65535 << 65536U; + QTest::newRow("65536") << 65536 << 131072U; + QTest::newRow("2^30") << (1 << 30) << (1U << 31); + QTest::newRow("2^30 + 1") << (1 << 30) + 1 << (1U << 31); + QTest::newRow("2^31 - 1") << 0x7FFFFFFF << (1U<<31); + QTest::newRow("-1") << -1 << 0U; + QTest::newRow("-128") << -128 << 0U; + QTest::newRow("-(2^31)") << int(0x80000000) << 0U; +} + +void tst_QMath::qNextPowerOfTwo32S() +{ + QFETCH(qint32, input); + QFETCH(quint32, output); + + QCOMPARE(qNextPowerOfTwo(input), output); +} + +void tst_QMath::qNextPowerOfTwo32U_data() +{ + QTest::addColumn("input"); + QTest::addColumn("output"); + + QTest::newRow("0") << 0U << 1U; + QTest::newRow("1") << 1U << 2U; + QTest::newRow("2") << 2U << 4U; + QTest::newRow("17") << 17U << 32U; + QTest::newRow("128") << 128U << 256U; + QTest::newRow("65535") << 65535U << 65536U; + QTest::newRow("65536") << 65536U << 131072U; + QTest::newRow("2^30") << (1U << 30) << (1U << 31); + QTest::newRow("2^30 + 1") << (1U << 30) + 1 << (1U << 31); + QTest::newRow("2^31 - 1") << 2147483647U << 2147483648U; + QTest::newRow("2^31") << 2147483648U << 0U; + QTest::newRow("2^31 + 1") << 2147483649U << 0U; +} + +void tst_QMath::qNextPowerOfTwo32U() +{ + QFETCH(quint32, input); + QFETCH(quint32, output); + + QCOMPARE(qNextPowerOfTwo(input), output); +} + +void tst_QMath::qNextPowerOfTwo64S_data() +{ + QTest::addColumn("input"); + QTest::addColumn("output"); + + QTest::newRow("0") << Q_INT64_C(0) << Q_UINT64_C(1); + QTest::newRow("1") << Q_INT64_C(1) << Q_UINT64_C(2); + QTest::newRow("2") << Q_INT64_C(2) << Q_UINT64_C(4); + QTest::newRow("17") << Q_INT64_C(17) << Q_UINT64_C(32); + QTest::newRow("128") << Q_INT64_C(128) << Q_UINT64_C(256); + QTest::newRow("65535") << Q_INT64_C(65535) << Q_UINT64_C(65536); + QTest::newRow("65536") << Q_INT64_C(65536) << Q_UINT64_C(131072); + QTest::newRow("2^31 - 1") << Q_INT64_C(2147483647) << Q_UINT64_C(0x80000000); + QTest::newRow("2^31") << Q_INT64_C(2147483648) << Q_UINT64_C(0x100000000); + QTest::newRow("2^31 + 1") << Q_INT64_C(2147483649) << Q_UINT64_C(0x100000000); + QTest::newRow("2^63 - 1") << Q_INT64_C(0x7FFFFFFFFFFFFFFF) << Q_UINT64_C(0x8000000000000000); + QTest::newRow("-1") << Q_INT64_C(-1) << Q_UINT64_C(0); + QTest::newRow("-128") << Q_INT64_C(-128) << Q_UINT64_C(0); + QTest::newRow("-(2^31)") << -Q_INT64_C(0x80000000) << Q_UINT64_C(0); + QTest::newRow("-(2^63)") << (qint64)Q_INT64_C(0x8000000000000000) << Q_UINT64_C(0); +} + +void tst_QMath::qNextPowerOfTwo64S() +{ + QFETCH(qint64, input); + QFETCH(quint64, output); + + QCOMPARE(qNextPowerOfTwo(input), output); +} + +void tst_QMath::qNextPowerOfTwo64U_data() +{ + QTest::addColumn("input"); + QTest::addColumn("output"); + + QTest::newRow("0") << Q_UINT64_C(0) << Q_UINT64_C(1); + QTest::newRow("1") << Q_UINT64_C(1) << Q_UINT64_C(2); + QTest::newRow("2") << Q_UINT64_C(2) << Q_UINT64_C(4); + QTest::newRow("17") << Q_UINT64_C(17) << Q_UINT64_C(32); + QTest::newRow("128") << Q_UINT64_C(128) << Q_UINT64_C(256); + QTest::newRow("65535") << Q_UINT64_C(65535) << Q_UINT64_C(65536); + QTest::newRow("65536") << Q_UINT64_C(65536) << Q_UINT64_C(131072); + QTest::newRow("2^63 - 1") << Q_UINT64_C(0x7FFFFFFFFFFFFFFF) << Q_UINT64_C(0x8000000000000000); + QTest::newRow("2^63") << Q_UINT64_C(0x8000000000000000) << Q_UINT64_C(0); + QTest::newRow("2^63 + 1") << Q_UINT64_C(0x8000000000000001) << Q_UINT64_C(0); +} + +void tst_QMath::qNextPowerOfTwo64U() +{ + QFETCH(quint64, input); + QFETCH(quint64, output); + + QCOMPARE(qNextPowerOfTwo(input), output); +} + QTEST_APPLESS_MAIN(tst_QMath) #include "tst_qmath.moc" -- cgit v1.2.3