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// Copyright (c) 2017-2025, University of Cincinnati, developed by Henry Schreiner
// under NSF AWARD 1414736 and by the respective contributors.
// All rights reserved.
//
// SPDX-License-Identifier: BSD-3-Clause
#include "fuzzApp.hpp"
#include <CLI/CLI.hpp>
#include <cstring>
#include <exception>
#include <string>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if(Size == 0) {
return 0;
}
std::string parseString(reinterpret_cast<const char *>(Data), Size);
CLI::FuzzApp fuzzdata;
auto app = fuzzdata.generateApp();
std::size_t pstring_start{0};
try {
pstring_start = fuzzdata.add_custom_options(app.get(), parseString);
} catch(const CLI::ConstructionError &e) {
return 0; // Non-zero return values are reserved for future use.
}
try {
if(pstring_start > 0) {
app->parse(parseString.substr(pstring_start));
// test to make sure no seg fault or other errors occur
std::ignore = app->help("", CLI::AppFormatMode::All);
} else {
app->parse(parseString);
}
} catch(const CLI::HorribleError &he) {
throw;
} catch(const CLI::ParseError &e) {
//(app)->exit(e);
// this just indicates we caught an error known by CLI
return 0; // Non-zero return values are reserved for future use.
}
if(fuzzdata.supports_config_file()) {
CLI::FuzzApp fuzzdata2;
auto app2 = fuzzdata2.generateApp();
// should be able to write the config to a file and read from it again
std::string configOut = app->config_to_str();
std::stringstream out(configOut);
if(pstring_start > 0) {
fuzzdata2.add_custom_options(app2.get(), parseString);
}
app2->parse_from_stream(out);
auto result = fuzzdata2.compare(fuzzdata);
if(!result) {
throw CLI::ValidationError("fuzzer", "file input results don't match parse results");
}
}
return 0;
}
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