| //===------------------------------------------------------------*- C++ -*-===// |
| // |
| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2017 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #import <CoreFoundation/CoreFoundation.h> |
| |
| /// - Note: This file is intended to be used solely for the Foundation and CoreFoundation overlays in swift |
| /// any and all other uses are not supported. The Foundation team reserves the right to alter the contract, |
| /// calling convention, availability or any other facet of facilities offered in this file. If you use |
| /// anything from here and your app breaks, expect any bug to be marked as "behaves correctly". |
| |
| CF_IMPLICIT_BRIDGING_ENABLED |
| CF_EXTERN_C_BEGIN |
| _Pragma("clang assume_nonnull begin") |
| |
| |
| #define _CF_HASHFACTOR 2654435761U |
| |
| CF_INLINE CFHashCode __CFHashInt(long i) { |
| return ((i > 0) ? (CFHashCode)(i) : (CFHashCode)(-i)) * _CF_HASHFACTOR; |
| } |
| |
| CF_INLINE CFHashCode __CFHashDouble(double d) { |
| double dInt; |
| if (d < 0) d = -d; |
| dInt = floor(d+0.5); |
| CFHashCode integralHash = _CF_HASHFACTOR * (CFHashCode)fmod(dInt, (double)ULONG_MAX); |
| return (CFHashCode)(integralHash + (CFHashCode)((d - dInt) * ULONG_MAX)); |
| } |
| |
| CF_EXPORT CFHashCode CFHashBytes(uint8_t *_Nullable bytes, long len); |
| |
| |
| CF_INLINE CFHashCode __CFHashBytes(uint8_t *_Nullable bytes, long len) { |
| return CFHashBytes(bytes, len); |
| } |
| |
| _Pragma("clang assume_nonnull end") |
| CF_EXTERN_C_END |
| CF_IMPLICIT_BRIDGING_DISABLED |
