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// Copyright 2024 Matt Borland
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/charconv.hpp>
#include <boost/core/detail/string_view.hpp>
#include <iostream>
#include <exception>
extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data, std::size_t size)
{
try
{
auto c_data = reinterpret_cast<const char*>(data);
const auto formats = {boost::charconv::chars_format::general,
boost::charconv::chars_format::fixed,
boost::charconv::chars_format::scientific,
boost::charconv::chars_format::hex};
for (const auto format : formats)
{
char buffer[20]; // Small enough it should encounter overflows
float f_val {};
boost::charconv::from_chars(c_data, c_data + size, f_val, format);
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), f_val, format);
double val {};
boost::charconv::from_chars(c_data, c_data + size, val, format);
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), val, format);
#if BOOST_CHARCONV_LDBL_BITS == 64
long double ld_val {};
boost::charconv::from_chars(c_data, c_data + size, ld_val, format);
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), ld_val, format);
#endif
// Also try with precisions
for (int precision = -1; precision < 10; ++precision)
{
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), f_val, format, precision);
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), val, format, precision);
#if BOOST_CHARCONV_LDBL_BITS == 64
boost::charconv::to_chars(buffer, buffer + sizeof(buffer), ld_val, format, precision);
#endif
}
}
}
catch(...)
{
std::cerr << "Error with: " << data << std::endl;
std::terminate();
}
return 0;
}
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