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// 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 <memusage.h>
#include <test/fuzz/FuzzedDataProvider.h>
#include <test/fuzz/fuzz.h>
#include <test/fuzz/util.h>
#include <util/serfloat.h>
#include <cassert>
#include <cmath>
#include <limits>
FUZZ_TARGET(float)
{
FuzzedDataProvider fuzzed_data_provider(buffer.data(), buffer.size());
{
const double d{[&] {
double tmp;
CallOneOf(
fuzzed_data_provider,
// an actual number
[&] { tmp = fuzzed_data_provider.ConsumeFloatingPoint<double>(); },
// special numbers and NANs
[&] { tmp = fuzzed_data_provider.PickValueInArray({
std::numeric_limits<double>::infinity(),
-std::numeric_limits<double>::infinity(),
std::numeric_limits<double>::min(),
-std::numeric_limits<double>::min(),
std::numeric_limits<double>::max(),
-std::numeric_limits<double>::max(),
std::numeric_limits<double>::lowest(),
-std::numeric_limits<double>::lowest(),
std::numeric_limits<double>::quiet_NaN(),
-std::numeric_limits<double>::quiet_NaN(),
std::numeric_limits<double>::signaling_NaN(),
-std::numeric_limits<double>::signaling_NaN(),
std::numeric_limits<double>::denorm_min(),
-std::numeric_limits<double>::denorm_min(),
}); },
// Anything from raw memory (also checks that DecodeDouble doesn't crash on any input)
[&] { tmp = DecodeDouble(fuzzed_data_provider.ConsumeIntegral<uint64_t>()); });
return tmp;
}()};
(void)memusage::DynamicUsage(d);
uint64_t encoded = EncodeDouble(d);
if constexpr (std::numeric_limits<double>::is_iec559) {
if (!std::isnan(d)) {
uint64_t encoded_in_memory;
std::copy((const unsigned char*)&d, (const unsigned char*)(&d + 1), (unsigned char*)&encoded_in_memory);
assert(encoded_in_memory == encoded);
}
}
double d_deserialized = DecodeDouble(encoded);
assert(std::isnan(d) == std::isnan(d_deserialized));
assert(std::isnan(d) || d == d_deserialized);
}
}
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