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src/test/fuzz/multiplication_overflow.cpp
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MarcoFalke
scripted-diff: [doc] Unify stale copyright headers
17 дек 2025, 00:21
17 дек 2025, 00:21
fa5f297
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// Copyright (c) 2020-present 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 } } // 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); }