// Copyright (c) 2020-2021 The Bitcoin Core developers

// Distributed under the MIT software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include <test/fuzz/FuzzedDataProvider.h>

#include <test/fuzz/fuzz.h>

#include <test/fuzz/util.h>

#include <cstdint>

#include <string>

#include <vector>

namespace {

template <typename T>

void TestMultiplicationOverflow(FuzzedDataProvider& fuzzed_data_provider)

{

    const T i = fuzzed_data_provider.ConsumeIntegral<T>();

    const T j = fuzzed_data_provider.ConsumeIntegral<T>();

    const bool is_multiplication_overflow_custom = MultiplicationOverflow(i, j);

#ifndef _MSC_VER

    T result_builtin;

    const bool is_multiplication_overflow_builtin = __builtin_mul_overflow(i, j, &result_builtin);

    assert(is_multiplication_overflow_custom == is_multiplication_overflow_builtin);

    if (!is_multiplication_overflow_custom) {

        assert(i * j == result_builtin);

    }

#else

    if (!is_multiplication_overflow_custom) {

        (void)(i * j);

    }

#endif

}

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIlEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowImEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIiEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIjEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIsEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowItEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIcEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIhEEvR18FuzzedDataProvider

Unexecuted instantiation: multiplication_overflow.cpp:_ZN12_GLOBAL__N_126TestMultiplicationOverflowIaEEvR18FuzzedDataProvider

} // namespace

FUZZ_TARGET(multiplication_overflow)

{

    FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());

    TestMultiplicationOverflow<int64_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<uint64_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<int32_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<uint32_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<int16_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<uint16_t>(fuzzed_data_provider);

    TestMultiplicationOverflow<char>(fuzzed_data_provider);

    TestMultiplicationOverflow<unsigned char>(fuzzed_data_provider);

    TestMultiplicationOverflow<signed char>(fuzzed_data_provider);

}