.

projects/12/ArrayTest/Array.jack

@@ -0,0 +1,29 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/12/Array.jack
+
+/**
+ * Represents an array.
+ * In the Jack language, arrays are instances of the Array class.
+ * Once declared, the array entries can be accessed using the usual
+ * syntax arr[i]. Each array entry can hold a primitive data type as 
+ * well as any object type. Different array entries can have different 
+ * data types.
+ */
+class Array {
+
+    /** Constructs a new Array of the given size. */
+    function Array new(int size) {
+    if(size < 0){
+        do Sys.error(7);
+    }
+        return Memory.alloc(size);
+    }
+
+    /** Disposes this array. */
+    method void dispose() {
+        do Memory.deAlloc(this);
+        return;
+    }
+}

projects/12/ArrayTest/Array.vm

@@ -0,0 +1,23 @@
+function Array.new 0
+push argument 0
+push constant 0
+lt
+not
+if-goto L0
+push constant 7
+call Sys.error 1
+pop temp 0
+goto L1
+label L0
+label L1
+push argument 0
+call Memory.alloc 1
+return
+function Array.dispose 0
+push argument 0
+pop pointer 0
+push pointer 0
+call Memory.deAlloc 1
+pop temp 0
+push constant 0
+return

projects/12/ArrayTest/ArrayTest.cmp

@@ -0,0 +1,2 @@
+|RAM[8000]|RAM[8001]|RAM[8002]|RAM[8003]|
+|     222 |     122 |     100 |      10 |

projects/12/ArrayTest/ArrayTest.tst

@@ -0,0 +1,15 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/12/ArrayTest/ArrayTest.tst
+
+load,
+output-file ArrayTest.out,
+compare-to ArrayTest.cmp,
+output-list RAM[8000]%D2.6.1 RAM[8001]%D2.6.1 RAM[8002]%D2.6.1 RAM[8003]%D2.6.1;
+
+repeat 1000000 {
+  vmstep;
+}
+
+output;

projects/12/ArrayTest/Main.jack

@@ -0,0 +1,40 @@
+// This file is part of www.nand2tetris.org
+// and the book "The Elements of Computing Systems"
+// by Nisan and Schocken, MIT Press.
+// File name: projects/12/ArrayTest/Main.jack
+
+/** Test program for the OS Array class. */
+class Main {
+
+    /** Performs several Array manipulations. */
+    function void main() {
+        var Array r;                  // stores test results
+        var Array a, b, c;
+        
+        let r = 8000;
+        
+        let a = Array.new(3);
+        let a[2] = 222;
+        let r[0] = a[2];              // RAM[8000] = 222
+        
+        let b = Array.new(3);
+        let b[1] = a[2] - 100;
+        let r[1] = b[1];              // RAM[8001] = 122
+        
+        let c = Array.new(500);
+        let c[499] = a[2] - b[1];
+        let r[2] = c[499];            // RAM[8002] = 100
+        
+        do a.dispose();
+        do b.dispose();
+        
+        let b = Array.new(3);
+        let b[0] = c[499] - 90;
+        let r[3] = b[0];              // RAM[8003] = 10
+        
+        do c.dispose();
+        do b.dispose();
+        
+        return;
+    }
+}

projects/12/ArrayTest/Main.vm

@@ -0,0 +1,131 @@
+function Main.main 4
+push constant 8000
+pop local 0
+push constant 3
+call Array.new 1
+pop local 1
+push local 1
+push constant 2
+push constant 222
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 0
+push constant 0
+push local 1
+push constant 2
+add
+pop pointer 1
+push that 0
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push constant 3
+call Array.new 1
+pop local 2
+push local 2
+push constant 1
+push local 1
+push constant 2
+add
+pop pointer 1
+push that 0
+push constant 100
+sub
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 0
+push constant 1
+push local 2
+push constant 1
+add
+pop pointer 1
+push that 0
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push constant 500
+call Array.new 1
+pop local 3
+push local 3
+push constant 499
+push local 1
+push constant 2
+add
+pop pointer 1
+push that 0
+push local 2
+push constant 1
+add
+pop pointer 1
+push that 0
+sub
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 0
+push constant 2
+push local 3
+push constant 499
+add
+pop pointer 1
+push that 0
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 1
+call Array.dispose 1
+pop temp 0
+push local 2
+call Array.dispose 1
+pop temp 0
+push constant 3
+call Array.new 1
+pop local 2
+push local 2
+push constant 0
+push local 3
+push constant 499
+add
+pop pointer 1
+push that 0
+push constant 90
+sub
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 0
+push constant 3
+push local 2
+push constant 0
+add
+pop pointer 1
+push that 0
+pop temp 1
+add
+pop pointer 1
+push temp 1
+pop that 0
+push local 3
+call Array.dispose 1
+pop temp 0
+push local 2
+call Array.dispose 1
+pop temp 0
+push constant 0
+return