From 9de52f375dc3bfc56923f306f14be799a5123ed1 Mon Sep 17 00:00:00 2001
From: Brendan Dahl <brendan.dahl@gmail.com>
Date: Fri, 30 Dec 2011 13:25:34 -0800
Subject: [PATCH] Fix idiv and cvi.  Add test case for idiv.

---
 src/function.js            |  4 ++--
 test/unit/function_spec.js | 11 ++++++++++-
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/src/function.js b/src/function.js
index 8a2d773a1..e8158341e 100644
--- a/src/function.js
+++ b/src/function.js
@@ -536,7 +536,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
             stack.push(Math.cos(a));
             break;
           case 'cvi':
-            a |= stack.pop();
+            a = stack.pop() | 0;
             stack.push(a);
             break;
           case 'cvr':
@@ -583,7 +583,7 @@ var PostScriptEvaluator = (function PostScriptEvaluatorClosure() {
           case 'idiv':
             b = stack.pop();
             a = stack.pop();
-            stack.push(Math.floor(a / b));
+            stack.push((a / b) | 0);
             break;
           case 'index':
             a = stack.pop();
diff --git a/test/unit/function_spec.js b/test/unit/function_spec.js
index 55ba4684e..2a1dc0b75 100644
--- a/test/unit/function_spec.js
+++ b/test/unit/function_spec.js
@@ -173,7 +173,16 @@ describe('function', function() {
     // TODO floor
     // TODO ge
     // TODO gt
-    // TODO idiv
+    it('divides to integer', function() {
+      var stack = evaluate('{ 2 3 idiv }');
+      var expectedStack = [0];
+      expect(stack).toMatchArray(expectedStack);
+    });
+    it('divides to negative integer', function() {
+      var stack = evaluate('{ -2 3 idiv }');
+      var expectedStack = [0];
+      expect(stack).toMatchArray(expectedStack);
+    });
     it('duplicates index', function() {
       var stack = evaluate('{ 4 3 2 1 2 index }');
       var expectedStack = [4, 3, 2, 1, 3];