std::ifstream in(filename.c_str(), std::ios::in | std::ios::binary);

std::string contents;

in.seekg(0, std::ios::end);

contents.resize(static_cast<std::string::size_type>(in.tellg()));

in.seekg(0, std::ios::beg);

in.read(contents.data(), static_cast<std::streamsize>(contents.size()));

return contents;

static const char qmap[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};

const auto uc = static_cast<unsigned char>(c);

// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-constant-array-index)

return {qmap[uc >> 4U], qmap[uc & 0x0FU]};

std::string result;

result.resize(data.size() * 2);

std::size_t index = 0;

for (auto b : data) {

std::ranges::copy(to_hex(b), &result[index]);

index += 2;

}

return result;