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/*
* Copyright 2021 Google Inc. All rights reserved.
*
* 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.
*/
#if !os(WASI)
import Foundation
#else
import SwiftOverlayShims
#endif
extension Int {
/// Moves the current int into the nearest power of two
///
/// This is used since the UnsafeMutableRawPointer will face issues when writing/reading
/// if the buffer alignment exceeds that actual size of the buffer
var convertToPowerofTwo: Int {
guard self > 0 else { return 1 }
var n = UOffset(self)
#if arch(arm) || arch(i386)
let max = UInt32(Int.max)
#else
let max = UInt32.max
#endif
n -= 1
n |= n >> 1
n |= n >> 2
n |= n >> 4
n |= n >> 8
n |= n >> 16
if n != max {
n += 1
}
return Int(n)
}
}
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