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App/util/FixedSizeCircularBuffer.h

@@ -0,0 +1,36 @@
+#pragma once
+
+namespace RBX {
+
+template<class ElementType, int size=8>
+struct FixedSizeCircularBuffer {
+private:
+	ElementType data[size];
+	unsigned int head;
+	unsigned int pushed;
+public:
+
+	FixedSizeCircularBuffer() : head(0), pushed(0) {}
+
+	void push(const ElementType& newData) {
+		head = (head + size - 1) % size;
+		data[head] = newData;
+		if (pushed < size) { pushed++; }
+	}
+
+	bool find(const ElementType& key, unsigned int* outIndex) {
+		for (unsigned int i = 0; i < pushed; ++i) {
+			if (data[(head + i) % size] == key) {
+				(*outIndex) = i;
+				return true;
+			}
+		}
+		return false;
+	}
+
+	const ElementType& operator[](const unsigned int& index) const {
+		return data[(head + index) % size];
+	}
+};
+
+}