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42 lines
1.3 KiB
C
42 lines
1.3 KiB
C
//===--- CFHashingShims.h - Declarations for CF hashing functions ---------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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CF_IMPLICIT_BRIDGING_ENABLED
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CF_EXTERN_C_BEGIN
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_Pragma("clang assume_nonnull begin")
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#define _CF_HASHFACTOR 2654435761U
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CF_INLINE CFHashCode __CFHashInt(long i) {
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return ((i > 0) ? (CFHashCode)(i) : (CFHashCode)(-i)) * _CF_HASHFACTOR;
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}
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CF_INLINE CFHashCode __CFHashDouble(double d) {
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double dInt;
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if (d < 0) d = -d;
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dInt = floor(d+0.5);
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CFHashCode integralHash = _CF_HASHFACTOR * (CFHashCode)fmod(dInt, (double)ULONG_MAX);
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return (CFHashCode)(integralHash + (CFHashCode)((d - dInt) * ULONG_MAX));
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}
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CF_EXPORT CFHashCode CFHashBytes(uint8_t *_Nullable bytes, long len);
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CF_INLINE CFHashCode __CFHashBytes(uint8_t *_Nullable bytes, long len) {
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return CFHashBytes(bytes, len);
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}
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_Pragma("clang assume_nonnull end")
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CF_EXTERN_C_END
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CF_IMPLICIT_BRIDGING_DISABLED
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