// Copyright (c) 2014 - 2024 Apple Inc. and the project authors

// Licensed under Apache License v2.0 with Runtime Library Exception

//

// See LICENSE.txt for license information:

// https://github.com/apple/swift-protobuf/blob/main/LICENSE.txt

//

// -----------------------------------------------------------------------------

import FuzzCommon

import SwiftProtobuf

@_cdecl("LLVMFuzzerTestOneInput")

public func FuzzBinary(_ start: UnsafeRawPointer, _ count: Int) -> CInt {

    guard let (options, bytes) = BinaryFuzzingOptions.extractOptions(start, count) else {

        return 1

    }

    var msg: SwiftProtoTesting_Fuzz_Message?

    do {

        msg = try SwiftProtoTesting_Fuzz_Message(

            serializedBytes: Array(bytes),

            extensions: SwiftProtoTesting_Fuzz_FuzzTesting_Extensions,

            partial: options.partialDecoding,

            options: options.decoding

        )

    } catch {

        // Error parsing are to be expected since not all input will be well formed.

    }

    // Test serialization for completeness.

    // If a message was parsed, it should not fail to serialize, so assert as such.

    let _: [UInt8]? = try! msg?.serializedBytes(options: options.encoding)

    return 0

}