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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftCertificates open source project
//
// Copyright (c) 2023 Apple Inc. and the SwiftCertificates project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftCertificates project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
extension RandomNumberGenerator {
@inlinable
internal mutating func bytes(count: Int) -> ArraySlice<UInt8> {
precondition(count >= 0)
var bytes = [UInt8]()
while bytes.count < count {
bytes.appendLittleEndianBytes(self.next())
}
return bytes[..<count]
}
}
extension Array where Element == UInt8 {
@inlinable
mutating func appendLittleEndianBytes(_ number: UInt64) {
let number = number.littleEndian
for byte in 0..<(MemoryLayout<UInt64>.size) {
let shifted = number >> (byte * 8)
self.append(UInt8(truncatingIfNeeded: shifted))
}
}
}
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