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// Copyright 2016 Yahoo Inc. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/fastos/fastos.h>
#include <vespa/log/log.h>
LOG_SETUP("bits_test");
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/util/bits.h>
#include <boost/crc.hpp>
using namespace vespalib;
class Test : public TestApp
{
public:
int Main() override;
template <typename T>
void testFixed(const T * v, size_t sz);
void testBuffer();
};
int
Test::Main()
{
TEST_INIT("bits_test");
uint8_t u8[5] = { 0, 1, 127, 135, 255 };
testFixed(u8, sizeof(u8)/sizeof(u8[0]));
uint16_t u16[5] = { 0, 1, 127, 135, 255 };
testFixed(u16, sizeof(u16)/sizeof(u16[0]));
uint32_t u32[5] = { 0, 1, 127, 135, 255 };
testFixed(u32, sizeof(u32)/sizeof(u32[0]));
uint64_t u64[5] = { 0, 1, 127, 135, 255 };
testFixed(u64, sizeof(u64)/sizeof(u64[0]));
testBuffer();
TEST_DONE();
}
template <typename T>
void Test::testFixed(const T * v, size_t sz)
{
EXPECT_EQUAL(0u, Bits::reverse(static_cast<T>(0)));
EXPECT_EQUAL(1ul << (sizeof(T)*8 - 1), Bits::reverse(static_cast<T>(1)));
EXPECT_EQUAL(static_cast<T>(-1), Bits::reverse(static_cast<T>(-1)));
for (size_t i(0); i < sz; i++) {
EXPECT_EQUAL(Bits::reverse(v[i]), boost::detail::reflector<sizeof(T)*8>::reflect(v[i]));
EXPECT_EQUAL(Bits::reverse(Bits::reverse(v[i])), v[i]);
}
}
void Test::testBuffer()
{
uint64_t a(0x0102040810204080ul);
uint64_t b(a);
Bits::reverse(&a, sizeof(a));
EXPECT_EQUAL(a, Bits::reverse(b));
Bits::reverse(&a, sizeof(a));
EXPECT_EQUAL(a, b);
}
TEST_APPHOOK(Test)
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