Swiftgram/Source/Private/ASEqualityHashHelpers.mm

//
//  ASEqualityHashHelpers.mm
//  AsyncDisplayKit
//
//  Copyright (c) 2014-present, Facebook, Inc.  All rights reserved.
//  This source code is licensed under the BSD-style license found in the
//  LICENSE file in the root directory of this source tree. An additional grant
//  of patent rights can be found in the PATENTS file in the same directory.
//

#import <AsyncDisplayKit/ASEqualityHashHelpers.h>

#import <functional>

NSUInteger ASHashFromCGPoint(const CGPoint point)
{
  return ASHash64ToNative(ASHashCombine(std::hash<CGFloat>()(point.x), std::hash<CGFloat>()(point.y)));
}

NSUInteger ASHashFromCGSize(const CGSize size)
{
  return ASHash64ToNative(ASHashCombine(std::hash<CGFloat>()(size.width), std::hash<CGFloat>()(size.height)));
}

NSUInteger ASHashFromCGRect(const CGRect rect)
{
  return ASHashFromCGPoint(rect.origin) + ASHashFromCGSize(rect.size);
}

NSUInteger ASIntegerArrayHash(const NSUInteger *subhashes, NSUInteger count)
{
  uint64_t result = subhashes[0];
  for (int ii = 1; ii < count; ++ii) {
    result = ASHashCombine(result, subhashes[ii]);
  }
  return ASHash64ToNative(result);
}