50 lines
1.2 KiB
C#
50 lines
1.2 KiB
C#
namespace System.Web.Mvc.ExpressionUtil {
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using System;
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using System.Collections;
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// based on System.Web.Util.HashCodeCombiner
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internal class HashCodeCombiner {
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private long _combinedHash64 = 0x1505L;
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public void AddFingerprint(ExpressionFingerprint fingerprint) {
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if (fingerprint != null) {
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fingerprint.AddToHashCodeCombiner(this);
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}
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else {
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AddInt32(0);
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}
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}
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public void AddEnumerable(IEnumerable e) {
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if (e == null) {
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AddInt32(0);
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}
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else {
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int count = 0;
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foreach (object o in e) {
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AddObject(o);
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count++;
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}
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AddInt32(count);
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}
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}
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public void AddInt32(int i) {
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_combinedHash64 = ((_combinedHash64 << 5) + _combinedHash64) ^ i;
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}
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public void AddObject(object o) {
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int oHashCode = (o != null) ? o.GetHashCode() : 0;
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AddInt32(oHashCode);
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}
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public int CombinedHash {
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get {
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return _combinedHash64.GetHashCode();
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}
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}
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}
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}
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