Index: pkg/dev_compiler/tool/input_sdk/lib/math/jenkins_smi_hash.dart |
diff --git a/pkg/dev_compiler/tool/input_sdk/lib/math/jenkins_smi_hash.dart b/pkg/dev_compiler/tool/input_sdk/lib/math/jenkins_smi_hash.dart |
deleted file mode 100644 |
index 8a0056eac9fa5c7e880bf029cfecab9ee8da55df..0000000000000000000000000000000000000000 |
--- a/pkg/dev_compiler/tool/input_sdk/lib/math/jenkins_smi_hash.dart |
+++ /dev/null |
@@ -1,41 +0,0 @@ |
-// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
-// for details. All rights reserved. Use of this source code is governed by a |
-// BSD-style license that can be found in the LICENSE file. |
-part of dart.math; |
- |
-/** |
- * This is the [Jenkins hash function][1] but using masking to keep |
- * values in SMI range. |
- * |
- * [1]: http://en.wikipedia.org/wiki/Jenkins_hash_function |
- * |
- * Use: |
- * Hash each value with the hash of the previous value, then get the final |
- * hash by calling finish. |
- * |
- * var hash = 0; |
- * for (var value in values) { |
- * hash = JenkinsSmiHash.combine(hash, value.hashCode); |
- * } |
- * hash = JenkinsSmiHash.finish(hash); |
- */ |
-class _JenkinsSmiHash { |
- // TODO(11617): This class should be optimized and standardized elsewhere. |
- |
- static int combine(int hash, int value) { |
- hash = 0x1fffffff & (hash + value); |
- hash = 0x1fffffff & (hash + ((0x0007ffff & hash) << 10)); |
- return hash ^ (hash >> 6); |
- } |
- |
- static int finish(int hash) { |
- hash = 0x1fffffff & (hash + ((0x03ffffff & hash) << 3)); |
- hash = hash ^ (hash >> 11); |
- return 0x1fffffff & (hash + ((0x00003fff & hash) << 15)); |
- } |
- |
- static int hash2(a, b) => finish(combine(combine(0, a), b)); |
- |
- static int hash4(a, b, c, d) => |
- finish(combine(combine(combine(combine(0, a), b), c), d)); |
-} |