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feat: Added extension method for generating stable string hashcodes

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This commit is contained in:
Chris Cameron 2019-03-26 11:28:15 -04:00
parent f60de4321b
commit 88a4801f8e
1 changed files with 24 additions and 0 deletions
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24
ICD.Common.Utils/Extensions/StringExtensions.cs
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@ -221,5 +221,29 @@ namespace ICD.Common.Utils.Extensions
return extends.Contains(character.ToString()); return extends.Contains(character.ToString());
} }
/// <summary>
/// Generates a hashcode that is consistent between program executions.
/// </summary>
/// <param name="extends"></param>
/// <returns></returns>
public static int GetStableHashCode(this string extends)
{
unchecked
{
int hash1 = 5381;
int hash2 = hash1;
for (int i = 0; i < extends.Length && extends[i] != '\0'; i += 2)
{
hash1 = ((hash1 << 5) + hash1) ^ extends[i];
if (i == extends.Length - 1 || extends[i + 1] == '\0')
break;
hash2 = ((hash2 << 5) + hash2) ^ extends[i + 1];
}
return hash1 + (hash2 * 1566083941);
}
}
} }
} }