complete project 12

Author: sapjax

.gitignore

@@ -3,6 +3,7 @@
 *.dat
 .vscode
 node_modules/
+tools/
 package-lock.json
 projects/10/**/*.js
 projects/11/**/*.js

projects/12/Array.jack

@@ -15,9 +15,12 @@ class Array {
 
     /** Constructs a new Array of the given size. */
     function Array new(int size) {
+        return Memory.alloc(size);
     }
 
     /** Disposes this array. */
     method void dispose() {
+        do Memory.deAlloc(this);
+        return;
     }
-}
+}

projects/12/ArrayTest/Array.jack

@@ -0,0 +1,26 @@
+// 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) {
+        return Memory.alloc(size);
+    }
+
+    /** Disposes this array. */
+    method void dispose() {
+        do Memory.deAlloc(this);
+        return;
+    }
+}

projects/12/ArrayTest/Array.vm

@@ -0,0 +1,12 @@
+function Array.new 0
+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.out

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

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 constant 2
+push local 1
+add
+push constant 222
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 0
+push local 0
+add
+push constant 2
+push local 1
+add
+pop pointer 1
+push that 0
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 3
+call Array.new 1
+pop local 2
+push constant 1
+push local 2
+add
+push constant 2
+push local 1
+add
+pop pointer 1
+push that 0
+push constant 100
+sub
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 1
+push local 0
+add
+push constant 1
+push local 2
+add
+pop pointer 1
+push that 0
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 500
+call Array.new 1
+pop local 3
+push constant 499
+push local 3
+add
+push constant 2
+push local 1
+add
+pop pointer 1
+push that 0
+push constant 1
+push local 2
+add
+pop pointer 1
+push that 0
+sub
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 2
+push local 0
+add
+push constant 499
+push local 3
+add
+pop pointer 1
+push that 0
+pop temp 0
+pop pointer 1
+push temp 0
+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 constant 0
+push local 2
+add
+push constant 499
+push local 3
+add
+pop pointer 1
+push that 0
+push constant 90
+sub
+pop temp 0
+pop pointer 1
+push temp 0
+pop that 0
+push constant 3
+push local 0
+add
+push constant 0
+push local 2
+add
+pop pointer 1
+push that 0
+pop temp 0
+pop pointer 1
+push temp 0
+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

projects/12/Keyboard.jack

@@ -7,10 +7,14 @@
  * A library for handling user input from the keyboard.
  */
 class Keyboard {
+    static int kbdAddr;
+    static Array keymap;
 
     /** Initializes the keyboard. */
     function void init() {
-    } 
+        let kbdAddr = 24576;
+        return;
+    }
 
     /**
      * Returns the character of the currently pressed key on the keyboard;
@@ -33,6 +37,7 @@ class Keyboard {
      * F1 - F12 = 141 - 152
      */
     function char keyPressed() {
+        return Memory.peek(kbdAddr);
     }
 
     /**								
@@ -41,6 +46,20 @@ class Keyboard {
      * of the pressed key.
      */
     function char readChar() {
+        var char c;
+
+        while (Keyboard.keyPressed() = 0) {
+            // do nothing
+        }
+
+        let c = Keyboard.keyPressed();
+
+        while (~(Keyboard.keyPressed() = 0)) {
+            // do nothing
+        }
+
+        do Output.printChar(c);
+        return c;
     }
 
     /**								
@@ -49,7 +68,30 @@ class Keyboard {
      * and returns its value. Also handles user backspaces.
      */
     function String readLine(String message) {
-    }   
+        var String s;
+        var char c;
+        let s = String.new(100);
+
+        do Output.printString(message);
+
+        while (true) {
+            let c = Keyboard.readChar();
+            // newline
+            if (c = String.newLine()) {
+                do Output.println();
+                return s;
+            } else {
+                // backspace
+                if (c = String.backSpace()) {
+                    do s.eraseLastChar();
+                    do Output.backSpace();
+                } else {
+                    let s = s.appendChar(c);
+                }
+            }
+        }
+        return s;
+    }
 
     /**								
      * Displays the message on the screen, reads from the keyboard the entered
@@ -58,5 +100,42 @@ class Keyboard {
      * entered text is detected). Also handles user backspaces. 
      */
     function int readInt(String message) {
+        var int num, one;
+        var char c;
+        var boolean first;
+
+        let num = 0;
+        let one = 1;
+        let first = true;
+
+        do Output.printString(message);
+
+        while (true) {
+            let c = Keyboard.readChar();
+
+            // - symbol
+            if (first & (c = 45)) {
+                let one = -1;
+            }
+            let first = false;
+
+            // newline
+            if (c = String.newLine()) {
+                do Output.println();
+                return num * one;
+            } else {
+                // 0 ~ 9
+                if ((c > 47) & (c < 58)) {
+                    let num = num * 10 + (c - 48);
+                }
+
+                // backspace
+                if (c = String.backSpace()) {
+                    let num = num / 10;
+                    do Output.backSpace();
+                }
+            }
+        }
+        return num * one;
     }
-}
+}