Resolve WES-90 "Integrate signpredictor in courses"

Packages/com.unity.barracuda/Runtime/Core/Internals/StringCache.cs

@@ -0,0 +1,90 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Unity.Barracuda
+{
+
+internal struct StringStringPair : IEquatable<StringStringPair>
+{
+    public string a;
+    public string b;
+
+    public bool Equals(StringStringPair other)
+    {
+        return string.Equals(a, other.a) && string.Equals(b, other.b);
+    }
+
+    public override bool Equals(object obj)
+    {
+        if (ReferenceEquals(null, obj)) return false;
+        return obj is StringStringPair && Equals((StringStringPair) obj);
+    }
+
+    public override int GetHashCode()
+    {
+        var hashCode = a.GetHashCode();
+        hashCode ^= b.GetHashCode();
+        return hashCode;
+    }
+}
+
+internal struct StringStringLongTriplet : IEquatable<StringStringLongTriplet>
+{
+    public string a;
+    public string b;
+    public long c;
+
+    public override int GetHashCode()
+    {
+        var hashCode = a.GetHashCode();
+        hashCode ^= b.GetHashCode();
+        hashCode ^= c.GetHashCode();
+        return hashCode;
+    }
+
+    public bool Equals(StringStringLongTriplet other)
+    {
+        return string.Equals(a, other.a) && string.Equals(b, other.b) && c == other.c;
+    }
+
+    public override bool Equals(object obj)
+    {
+        if (ReferenceEquals(null, obj)) return false;
+        return obj is StringStringLongTriplet && Equals((StringStringLongTriplet) obj);
+    }
+}
+
+internal class StringCache
+{
+    private Dictionary<StringStringPair, string> m_CacheStringString = new Dictionary<StringStringPair, string>();
+    private Dictionary<StringStringLongTriplet, string> m_CacheStringStringLong = new Dictionary<StringStringLongTriplet, string>();
+
+    public string Lookup(string a, string b)
+    {
+        var key = new StringStringPair {a = a ?? "", b = b ?? ""};
+
+        if (!m_CacheStringString.ContainsKey(key))
+            m_CacheStringString[key] = a + b;
+
+        return m_CacheStringString[key];
+    }
+
+    public string Lookup(string a, string b, long c)
+    {
+        var key = new StringStringLongTriplet {a = a ?? "", b = b ?? "", c = c};
+
+        if (!m_CacheStringStringLong.ContainsKey(key))
+            m_CacheStringStringLong[key] = a + b + c;
+
+        return m_CacheStringStringLong[key];
+    }
+
+    public void Clear()
+    {
+        m_CacheStringString.Clear();
+        m_CacheStringStringLong.Clear();
+    }
+}
+
+} // namespace Unity.Barracuda