pkl-swift/Sources/MessagePack/FixedWidthInteger.swift

37 lines
1.4 KiB
Swift

//===----------------------------------------------------------------------===//
// Copyright © 2024-2025 Apple Inc. and the Pkl project authors. 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
//
// https://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.
//===----------------------------------------------------------------------===//
extension FixedWidthInteger {
init(bytes: [UInt8]) {
self =
bytes.withUnsafeBufferPointer {
$0.baseAddress!.withMemoryRebound(to: Self.self, capacity: 1) {
$0.pointee
}
}.bigEndian
}
var bytes: [UInt8] {
let capacity = MemoryLayout<Self>.size
var mutableValue = self.bigEndian
return withUnsafePointer(to: &mutableValue) {
$0.withMemoryRebound(to: UInt8.self, capacity: capacity) {
Array(UnsafeBufferPointer(start: $0, count: capacity))
}
}
}
}