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// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
@_implementationOnly import CoreFoundation
extension Set : _ObjectiveCBridgeable {
public typealias _ObjectType = NSSet
public func _bridgeToObjectiveC() -> _ObjectType {
let buffer = UnsafeMutablePointer<AnyObject>.allocate(capacity: count)
for (idx, obj) in enumerated() {
buffer.advanced(by: idx).initialize(to: obj as AnyObject)
}
let set = NSSet(objects: buffer, count: count)
buffer.deinitialize(count: count)
buffer.deallocate()
return set
}
public static func _forceBridgeFromObjectiveC(_ source: _ObjectType, result: inout Set?) {
result = _unconditionallyBridgeFromObjectiveC(source)
}
@discardableResult
public static func _conditionallyBridgeFromObjectiveC(_ source: _ObjectType, result: inout Set?) -> Bool {
var set = Set<Element>()
var failedConversion = false
if type(of: source) == NSSet.self || type(of: source) == NSMutableSet.self {
source.enumerateObjects(options: []) { obj, stop in
if let o = obj as? Element {
set.insert(o)
} else {
// here obj must be a swift type
if let nsObject = __SwiftValue.store(obj) as? Element {
set.insert(nsObject)
} else {
failedConversion = true
stop.pointee = true
}
}
}
} else if type(of: source) == _NSCFSet.self {
let cf = source._cfObject
let cnt = CFSetGetCount(cf)
let objs = UnsafeMutablePointer<UnsafeRawPointer?>.allocate(capacity: cnt)
CFSetGetValues(cf, objs)
for idx in 0..<cnt {
let obj = unsafeBitCast(objs.advanced(by: idx), to: AnyObject.self)
if let o = obj as? Element {
set.insert(o)
} else {
failedConversion = true
break
}
}
objs.deinitialize(count: cnt)
objs.deallocate()
}
if !failedConversion {
result = set
return true
}
return false
}
static public func _unconditionallyBridgeFromObjectiveC(_ source: _ObjectType?) -> Set {
if let object = source {
var value: Set<Element>?
_conditionallyBridgeFromObjectiveC(object, result: &value)
return value!
} else {
return Set<Element>()
}
}
}
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