using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Signum.Entities.Reflection { public static class StringHashEncoder { static readonly string letters = "0123456789ABCDEFGHJKMNPQRSTVWXYZ"; public static string Codify(string str) { int hash = GetHashCode32(str); StringBuilder sb = new StringBuilder(); for (int i = 0; i < 32; i += 5) { sb.Append(letters[hash & 31]); hash >>= 5; } return sb.ToString(); } public static int GetHashCode32(string value) { int num = 0x15051505; int num2 = num; for (int i = 0; i < value.Length; i++) { if ((i & 0x1) == 0) num = (((num << 5) + num) + (num >> 0x1b)) ^ value[i]; else num2 = (((num2 << 5) + num2) + (num2 >> 0x1b)) ^ value[i]; } return (num + (num2 * 0x5d588b65)); } } }
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Math Primers for Programmers
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