92 lines
2 KiB
C++
92 lines
2 KiB
C++
// Copyright (c) 2019, Paul Dreik
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// For the license information refer to format.h.
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#include <fmt/chrono.h>
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#include <cstdint>
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#include <exception>
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#include "fuzzer-common.h"
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template <typename T, typename Repr> const T* from_repr(const Repr& r) {
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return &r;
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}
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template <> const std::tm* from_repr<std::tm>(const std::time_t& t) {
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return std::localtime(&t);
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}
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template <typename T, typename Repr = T>
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void invoke_fmt(const uint8_t* data, size_t size) {
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static_assert(sizeof(Repr) <= fixed_size, "Nfixed is too small");
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if (size <= fixed_size) return;
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auto repr = assign_from_buf<Repr>(data);
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const T* value = from_repr<T>(repr);
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if (!value) return;
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data += fixed_size;
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size -= fixed_size;
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data_to_string format_str(data, size);
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try {
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#if FMT_FUZZ_FORMAT_TO_STRING
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std::string message = fmt::format(format_str.get(), *value);
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#else
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auto buf = fmt::memory_buffer();
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fmt::format_to(std::back_inserter(buf), format_str.get(), *value);
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#endif
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} catch (std::exception&) {
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}
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}
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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if (size <= 3) return 0;
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const auto first = data[0];
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data++;
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size--;
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switch (first) {
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case 0:
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invoke_fmt<bool>(data, size);
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break;
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case 1:
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invoke_fmt<char>(data, size);
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break;
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case 2:
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invoke_fmt<unsigned char>(data, size);
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break;
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case 3:
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invoke_fmt<signed char>(data, size);
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break;
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case 4:
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invoke_fmt<short>(data, size);
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break;
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case 5:
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invoke_fmt<unsigned short>(data, size);
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break;
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case 6:
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invoke_fmt<int>(data, size);
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break;
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case 7:
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invoke_fmt<unsigned int>(data, size);
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break;
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case 8:
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invoke_fmt<long>(data, size);
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break;
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case 9:
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invoke_fmt<unsigned long>(data, size);
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break;
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case 10:
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invoke_fmt<float>(data, size);
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break;
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case 11:
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invoke_fmt<double>(data, size);
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break;
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case 12:
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invoke_fmt<long double>(data, size);
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break;
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case 13:
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invoke_fmt<std::tm, std::time_t>(data, size);
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break;
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}
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return 0;
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}
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