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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2023-2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
@_exported import protocol Crypto.HashFunction
import struct Foundation.URL
import struct SystemPackage.FilePath
/// Indicates that values of a conforming type can be hashed with an arbitrary hashing function. Unlike `Hashable`,
/// this protocol doesn't utilize random seed values and produces consistent hash values across process launches.
public protocol CacheKey: Encodable {}
/// Types that cannot be decomposed more to be hashed
protocol LeafCacheKey: CacheKey {
func hash(with hashFunction: inout some HashFunction)
}
extension Bool: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
hashFunction.update(data: self ? [1] : [0])
}
}
extension Int: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Int8: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Int16: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Int32: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Int64: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension UInt: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension UInt8: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension UInt16: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension UInt32: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension UInt64: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Float: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension Double: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
withUnsafeBytes(of: self) {
hashFunction.update(data: $0)
}
}
}
extension String: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
var t = String(reflecting: Self.self)
t.withUTF8 {
hashFunction.update(data: $0)
}
var x = self
x.withUTF8 {
hashFunction.update(data: $0)
}
}
}
extension FilePath: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
self.string.hash(with: &hashFunction)
}
}
extension FilePath.Component: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
self.string.hash(with: &hashFunction)
}
}
extension URL: LeafCacheKey {
func hash(with hashFunction: inout some HashFunction) {
String(reflecting: Self.self).hash(with: &hashFunction)
self.description.hash(with: &hashFunction)
}
}
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