// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
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// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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#include <cstddef>
#include <iostream>
#include <span>
#include <string>

#include "src/tint/cmd/fuzz/common/init.h"
#include "src/tint/cmd/fuzz/wgsl/fuzz.h"
#include "src/tint/utils/text/base64.h"
#include "src/tint/utils/text/string.h"

namespace {

tint::fuzz::wgsl::Options options;

}  // namespace

extern "C" int LLVMFuzzerTestOneInput(const uint8_t* input, size_t size) {
    if (size > 0) {
        std::string_view wgsl(reinterpret_cast<const char*>(input), size);
        auto data = tint::DecodeBase64FromComments(wgsl);
        tint::fuzz::wgsl::Run(wgsl, options, data.AsSpan());
    }
    return 0;
}

// Explicitly specify the visibility to prevent the linker from stripping the function on macOS, as
// the LibFuzzer runtime uses dlsym() instead of calling the function directly.
extern "C" __attribute__((visibility("default"))) int LLVMFuzzerInitialize(int* argc,
                                                                           char*** argv) {
    return tint::fuzz::common::ParseFuzzerOptions(tint::fuzz::common::FuzzerType::kWGSL, argc, argv,
                                                  &options);
}
