From 039f7f71e049029ab71a6d6c60d2eed5f95e5795 Mon Sep 17 00:00:00 2001
From: bculkin2442 <bjculkin@mix.wvu.edu>
Date: Thu, 16 Feb 2017 09:35:10 -0500
Subject: Update

---
 .../src/main/java/bjc/utils/esodata/Tape.java      | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 BJC-Utils2/src/main/java/bjc/utils/esodata/Tape.java

(limited to 'BJC-Utils2/src/main/java/bjc/utils/esodata')

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;
+	}
+}
-- 
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