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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** This file is part of the test suite of the Qt Toolkit.
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** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
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** file. Please review the following information to ensure the GNU General
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****************************************************************************/


#include <QtTest/QtTest>
#include <QtCore/qendian.h>


class tst_QtEndian: public QObject
{
    Q_OBJECT

private slots:
    void fromBigEndian();
    void fromLittleEndian();

    void toBigEndian();
    void toLittleEndian();
};

struct TestData
{
    quint64 data64;
    quint32 data32;
    quint16 data16;
    quint8 data8;

    quint8 reserved;
};

union RawTestData
{
    uchar rawData[sizeof(TestData)];
    TestData data;
};

static const TestData inNativeEndian = { Q_UINT64_C(0x0123456789abcdef), 0x00c0ffee, 0xcafe, 0xcf, '\0' };
static const RawTestData inBigEndian = { "\x01\x23\x45\x67\x89\xab\xcd\xef" "\x00\xc0\xff\xee" "\xca\xfe" "\xcf" };
static const RawTestData inLittleEndian = { "\xef\xcd\xab\x89\x67\x45\x23\x01" "\xee\xff\xc0\x00" "\xfe\xca" "\xcf" };

#define EXPAND_ENDIAN_TEST(endian)          \
    do {                                    \
        /* Unsigned tests */                \
        ENDIAN_TEST(endian, quint, 64);     \
        ENDIAN_TEST(endian, quint, 32);     \
        ENDIAN_TEST(endian, quint, 16);     \
        ENDIAN_TEST(endian, quint, 8);      \
                                            \
        /* Signed tests */                  \
        ENDIAN_TEST(endian, qint, 64);      \
        ENDIAN_TEST(endian, qint, 32);      \
        ENDIAN_TEST(endian, qint, 16);      \
        ENDIAN_TEST(endian, qint, 8);       \
    } while (false)                         \
    /**/

#define ENDIAN_TEST(endian, type, size)                                                 \
    do {                                                                                \
        QCOMPARE(qFrom ## endian ## Endian(                                             \
                    (type ## size)(in ## endian ## Endian.data.data ## size)),          \
                (type ## size)(inNativeEndian.data ## size));                           \
        QCOMPARE(qFrom ## endian ## Endian<type ## size>(                               \
                    in ## endian ## Endian.rawData + offsetof(TestData, data ## size)), \
                (type ## size)(inNativeEndian.data ## size));                           \
    } while (false)                                                                     \
    /**/

void tst_QtEndian::fromBigEndian()
{
    EXPAND_ENDIAN_TEST(Big);
}

void tst_QtEndian::fromLittleEndian()
{
    EXPAND_ENDIAN_TEST(Little);
}

#undef ENDIAN_TEST


#define ENDIAN_TEST(endian, type, size)                                                 \
    do {                                                                                \
        QCOMPARE(qTo ## endian ## Endian(                                               \
                    (type ## size)(inNativeEndian.data ## size)),                       \
                (type ## size)(in ## endian ## Endian.data.data ## size));              \
                                                                                        \
        RawTestData test;                                                               \
        qTo ## endian ## Endian(                                                        \
                (type ## size)(inNativeEndian.data ## size),                            \
                test.rawData + offsetof(TestData, data ## size));                       \
        QCOMPARE(test.data.data ## size, in ## endian ## Endian.data.data ## size );    \
    } while (false)                                                                     \
    /**/

void tst_QtEndian::toBigEndian()
{
    EXPAND_ENDIAN_TEST(Big);
}

void tst_QtEndian::toLittleEndian()
{
    EXPAND_ENDIAN_TEST(Little);
}

#undef ENDIAN_TEST

QTEST_MAIN(tst_QtEndian)
#include "tst_qtendian.moc"