/* Copyright 2024 Google LLC

Licensed under the Apache License, Version 2.0 (the "License");

you may not use this file except in compliance with the License.

You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software

distributed under the License is distributed on an "AS IS" BASIS,

WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

See the License for the specific language governing permissions and

limitations under the License.

*/

// The ideal place for this fuzz target is the boost repository.

#include <boost/program_options.hpp>

namespace po = boost::program_options;

#include <sstream>

#include <fuzzer/FuzzedDataProvider.h>

using namespace std;

po::options_description set_options()

{

    po::options_description opts;

    opts.add_options()

        ("global_string", po::value<string>())

        ("strings.word", po::value<string>())

        ("strings.phrase", po::value<string>())

        ("strings.quoted", po::value<string>())

        ("ints.positive", po::value<int>())

        ("ints.negative", po::value<int>())

        ("ints.hex", po::value<int>())

        ("ints.oct", po::value<int>())

        ("ints.bin", po::value<int>())

        ("floats.positive", po::value<float>())

        ("floats.negative", po::value<float>())

        ("floats.double", po::value<double>())

        ("floats.int", po::value<float>())

        ("floats.int_dot", po::value<float>())

        ("floats.dot", po::value<float>())

        ("floats.exp_lower", po::value<float>())

        ("floats.exp_upper", po::value<float>())

        ("floats.exp_decimal", po::value<float>())

        ("floats.exp_negative", po::value<float>())

        ("floats.exp_negative_val", po::value<float>())

        ("floats.exp_negative_negative_val", po::value<float>())

        ("booleans.number_true", po::bool_switch())

        ("booleans.number_false", po::bool_switch())

        ("booleans.yn_true", po::bool_switch())

        ("booleans.yn_false", po::bool_switch())

        ("booleans.tf_true", po::bool_switch())

        ("booleans.tf_false", po::bool_switch())

        ("booleans.onoff_true", po::bool_switch())

        ("booleans.onoff_false", po::bool_switch())

        ("booleans.present_equal_true", po::bool_switch())

       ("booleans.present_no_equal_true", po::bool_switch())

       ;

    return opts;

}

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)

{

    try {

        FuzzedDataProvider fdp(data, size);

        auto opts = set_options();

        po::variables_map vars;

        stringstream st(fdp.ConsumeRemainingBytesAsString());

        const bool ALLOW_UNREGISTERED = true;

        po::parsed_options parsed = parse_config_file(st, opts, ALLOW_UNREGISTERED);

        store(parsed, vars);

        vector<string> unregistered = po::collect_unrecognized(parsed.options, po::exclude_positional);

        notify(vars);

    } catch(...) {

    }

    return 0;

}