Update

1 files changed, 44 insertions, 0 deletions

diff --git a/BJC-Utils2/src/main/java/bjc/utils/esodata/Tape.java b/BJC-Utils2/src/main/java/bjc/utils/esodata/Tape.java
new file mode 100644
index 0000000..4ead829
--- /dev/null
+++ b/BJC-Utils2/src/main/java/bjc/utils/esodata/Tape.java
@@ -0,0 +1,44 @@
+package bjc.utils.esodata;
+
+import java.util.ArrayList;
+
+public class Tape<T> {
+	private ArrayList<T> backing;
+	private int pos;
+
+	public Tape() {
+		backing = new ArrayList<>();
+	}
+
+	public T item() {
+		return backing.get(pos);
+	}
+
+	public boolean left() {
+		if(pos == 0) return false;
+		
+		pos -= 1;
+		return true;
+	}
+
+	public boolean left(int amt) {
+		if((pos - amt) < 0) return false;
+
+		pos -= amt;
+		return true;
+	}
+
+	public boolean right() {
+		if(pos == (backing.size() - 1)) return false;
+
+		pos += 1;
+		return true;
+	}
+
+	public boolean right(int amt) {
+		if((pos + amt) >= (backing.size() - 1)) return false;
+
+		pos += amt;
+		return true;
+	}
+}