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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCrypto open source project
//
// Copyright (c) 2019-2020 Apple Inc. and the SwiftCrypto project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.md for the list of SwiftCrypto project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
import Foundation
import Dispatch
// A testing utility that creates one contiguous and one discontiguous representation of the given Data.
extension Array where Element == UInt8 {
func asDataProtocols() -> (contiguous: Data, discontiguous: DispatchData) {
guard self.count > 0 else {
// We can't really have discontiguous options here, so we just return empty versions
// of both.
return (Data(), DispatchData.empty)
}
let contiguous = Data(self)
let discontiguous: DispatchData = self.withUnsafeBytes { bytesPointer in
let pivot = bytesPointer.count / 2
var data = DispatchData.empty
data.append(DispatchData(bytes: UnsafeRawBufferPointer(rebasing: bytesPointer[..<pivot])))
data.append(DispatchData(bytes: UnsafeRawBufferPointer(rebasing: bytesPointer[pivot...])))
return data
}
return (contiguous: contiguous, discontiguous: discontiguous)
}
}
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