| // A fuzzer for floating-point formatter. |
| // For the license information refer to format.h. |
| |
| #include <cstdint> |
| #include <cstdlib> |
| #include <stdexcept> |
| #include <limits> |
| #include <fmt/format.h> |
| |
| #include "fuzzer-common.h" |
| |
| extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { |
| if (size <= sizeof(double) || !std::numeric_limits<double>::is_iec559) |
| return 0; |
| |
| auto value = assign_from_buf<double>(data); |
| auto buffer = fmt::memory_buffer(); |
| fmt::format_to(buffer, "{}", value); |
| |
| // Check a round trip. |
| if (std::isnan(value)) { |
| auto nan = std::signbit(value) ? "-nan" : "nan"; |
| if (fmt::string_view(buffer.data(), buffer.size()) != nan) |
| throw std::runtime_error("round trip failure"); |
| return 0; |
| } |
| buffer.push_back('\0'); |
| char* ptr = nullptr; |
| if (std::strtod(buffer.data(), &ptr) != value) |
| throw std::runtime_error("round trip failure"); |
| if (ptr + 1 != buffer.end()) |
| throw std::runtime_error("unparsed output"); |
| return 0; |
| } |