sdk/lib/math/jenkins_smi_hash.dart - Issue 2973823002: Revert "Remaining private libs"

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Side by Side Diff: sdk/lib/math/jenkins_smi_hash.dart

Issue 2973823002: Revert "Remaining private libs" (Closed)

Patch Set: Created 3 years, 5 months ago

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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file	1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file

2 // for details. All rights reserved. Use of this source code is governed by a	2 // for details. All rights reserved. Use of this source code is governed by a

3 // BSD-style license that can be found in the LICENSE file.	3 // BSD-style license that can be found in the LICENSE file.

4	4

5 part of "dart:math";	5 part of "math.dart";

6	6

7 /**	7 /**

8 * This is the [Jenkins hash function][1] but using masking to keep	8 * This is the [Jenkins hash function][1] but using masking to keep

9 * values in SMI range.	9 * values in SMI range.

10 *	10 *

11 * [1]: http://en.wikipedia.org/wiki/Jenkins_hash_function	11 * [1]: http://en.wikipedia.org/wiki/Jenkins_hash_function

12 *	12 *

13 * Use:	13 * Use:

14 * Hash each value with the hash of the previous value, then get the final	14 * Hash each value with the hash of the previous value, then get the final

15 * hash by calling finish.	15 * hash by calling finish.

(...skipping 17 matching lines...) Expand all Loading...
33 hash = 0x1fffffff & (hash + ((0x03ffffff & hash) << 3));	33 hash = 0x1fffffff & (hash + ((0x03ffffff & hash) << 3));

34 hash = hash ^ (hash >> 11);	34 hash = hash ^ (hash >> 11);

35 return 0x1fffffff & (hash + ((0x00003fff & hash) << 15));	35 return 0x1fffffff & (hash + ((0x00003fff & hash) << 15));

36 }	36 }

37	37

38 static int hash2(a, b) => finish(combine(combine(0, a), b));	38 static int hash2(a, b) => finish(combine(combine(0, a), b));

39	39

40 static int hash4(a, b, c, d) =>	40 static int hash4(a, b, c, d) =>

41 finish(combine(combine(combine(combine(0, a), b), c), d));	41 finish(combine(combine(combine(combine(0, a), b), c), d));

42 }	42 }

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