From 90c8a4e06ddeaf027bc271dd4edaa007dcee2a46 Mon Sep 17 00:00:00 2001
From: Nikhil Marathe <nsm.nikhil@gmail.com>
Date: Wed, 18 Jan 2012 23:32:43 +0530
Subject: [PATCH] Methods example

---
 methods/main.cc | 63 +++++++++++++++++++++++++++++++++++++++++++++++++
 methods/wscript | 13 ++++++++++
 slides.rst      | 20 +++++++++++++---
 3 files changed, 93 insertions(+), 3 deletions(-)
 create mode 100644 methods/main.cc
 create mode 100644 methods/wscript

diff --git a/methods/main.cc b/methods/main.cc
new file mode 100644
index 0000000..f3d7606
--- /dev/null
+++ b/methods/main.cc
@@ -0,0 +1,63 @@
+#include <v8.h>
+#include <node.h>
+using namespace v8;
+
+Handle<Value> Inventory(const Arguments &args) {
+    return args.This();
+}
+
+Handle<Value> AddStock(const Arguments &args) {
+    HandleScope scope;
+
+    Handle<Object> This = args.This();
+
+    int items = This->Get(String::New("items"))->Uint32Value();
+
+    items += args[0]->Uint32Value();
+
+    This->Set(String::New("items"), Integer::New(items));
+
+    return Undefined();
+}
+
+Handle<Value> Ship(const Arguments &args) {
+    HandleScope scope;
+
+    Handle<Object> This = args.This();
+    int items = This->Get(String::New("items"))->Uint32Value();
+
+    int orders = args[0]->Uint32Value();
+
+    if (items < orders)
+        return ThrowException(String::New("Not enough items"));
+
+    This->Set(String::New("items"), Integer::New(items - orders));
+
+    return Undefined();
+}
+
+extern "C" {
+    static void Init(Handle<Object> target) {
+        HandleScope scope;
+
+        Handle<FunctionTemplate> inventoryTpl =
+            FunctionTemplate::New(Inventory);
+
+        Handle<ObjectTemplate> instance =
+            inventoryTpl->InstanceTemplate();
+
+        instance->Set(String::New("items"), Integer::New(257));
+
+        // operating on inventoryTpl->PrototypeTemplate()
+        NODE_SET_PROTOTYPE_METHOD(inventoryTpl,
+                                  "addStock",
+                                  AddStock);
+        NODE_SET_PROTOTYPE_METHOD(inventoryTpl,
+                                  "ship",
+                                  Ship);
+
+        target->Set(String::NewSymbol("Inventory"),
+                    inventoryTpl->GetFunction());
+    }
+    NODE_MODULE(methods, Init)
+}
diff --git a/methods/wscript b/methods/wscript
new file mode 100644
index 0000000..2484e80
--- /dev/null
+++ b/methods/wscript
@@ -0,0 +1,13 @@
+import Options
+
+def set_options(opt):
+    opt.tool_options("compiler_cxx")
+
+def configure(conf):
+    conf.check_tool("compiler_cxx")
+    conf.check_tool("node_addon")
+
+def build(bld):
+    obj = bld.new_task_gen("cxx", "shlib", "node_addon")
+    obj.target = "methods"
+    obj.source = "main.cc"
diff --git a/slides.rst b/slides.rst
index 3335ccd..18f0522 100644
--- a/slides.rst
+++ b/slides.rst
@@ -198,10 +198,24 @@ Simple objects
 
 .. code-block:: cpp
     :include: simpleobject/main.cc
-    :start-at: static void
-    :end-at: }
+    :start-at: static void Init
+    :end-before: NODE_MODULE
+
+Methods
+-------
+
+.. code-block:: js
+
+    Inventory.prototype.addStock = function(newStock) {
+        this.items += newStock;
+    }
 
-TODO fix indentation in inclusion
+    Inventory.prototype.ship = function(orders) {
+        if (this.items < orders)
+            throw Exception("Not enough items");
+
+        this.items -= orders
+    }
 
 ObjectWrap
 ----------