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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/util/crc.h>
#include <boost/crc.hpp>
#include <vector>
using namespace vespalib;
class Test : public TestApp
{
public:
int Main() override;
void testCorrectNess();
void testBenchmark(bool our, size_t bufSz, size_t numRep);
};
int
Test::Main()
{
TEST_INIT("crc_test");
testCorrectNess();
if (_argc >= 2) {
testBenchmark(false, 1024, 1000*1000);
} else {
testBenchmark(true, 1024, 1000*1000);
}
TEST_DONE();
}
void Test::testCorrectNess()
{
const char *a[7] = { "", "a", "ab", "abc", "abcd", "abcde", "doc:crawler:http://www.ntnu.no/" };
for (size_t i(0); i < sizeof(a)/sizeof(a[0]); i++) {
uint32_t vespaCrc32 = crc_32_type::crc(a[i], strlen(a[i]));
boost::crc_32_type calculator;
calculator.process_bytes(a[i], strlen(a[i]));
EXPECT_EQUAL(vespaCrc32, calculator.checksum());
vespalib::crc_32_type calculator2;
calculator2.process_bytes(a[i], strlen(a[i]));
EXPECT_EQUAL(vespaCrc32, calculator2.checksum());
EXPECT_EQUAL(calculator.checksum(), calculator2.checksum());
}
vespalib::crc_32_type calculator2;
boost::crc_32_type calculator;
for (size_t i(0); i < sizeof(a)/sizeof(a[0]); i++) {
calculator.process_bytes(a[i], strlen(a[i]));
calculator2.process_bytes(a[i], strlen(a[i]));
EXPECT_EQUAL(calculator.checksum(), calculator2.checksum());
}
EXPECT_EQUAL(calculator.checksum(), calculator2.checksum());
}
void Test::testBenchmark(bool our, size_t bufSz, size_t numRep)
{
std::vector<char> a(numRep+bufSz);
for(size_t i(0), m(a.size()); i < m; i++) {
a[i] = i&0xff;
}
uint32_t sum(0);
if (our) {
for (size_t i(0); i < (numRep); i++) {
//sum ^= crc_32_type::crc(&a[i], bufSz);
vespalib::crc_32_type calculator;
calculator.process_bytes(&a[i], bufSz);
sum ^=calculator.checksum();
}
} else {
for (size_t i(0); i < (numRep); i++) {
boost::crc_32_type calculator;
calculator.process_bytes(&a[i], bufSz);
sum ^=calculator.checksum();
}
}
printf("sum = %x\n", sum);
}
TEST_APPHOOK(Test)
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