Add Buffer::fill method to do memset

Fixes #477.

2 files changed, 23 insertions, 0 deletions

diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index 63db6107e0..f8d1a30879 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -376,6 +376,27 @@ Handle<Value> Buffer::Base64Slice(const Arguments &args) {
 }
 
 
+// buffer.fill(value, start, end);
+Handle<Value> Buffer::Fill(const Arguments &args) {
+  HandleScope scope;
+
+  if (!args[0]->IsInt32()) {
+    return ThrowException(Exception::Error(String::New(
+            "value is not a number")));
+  }
+  int value = (char)args[0]->Int32Value();
+
+  Buffer *parent = ObjectWrap::Unwrap<Buffer>(args.This());
+  SLICE_ARGS(args[1], args[2])
+
+  memset( (void*)(parent->data_ + start),
+          value,
+          end - start);
+
+  return Undefined();
+}
+
+
 // var bytesCopied = buffer.copy(target, targetStart, sourceStart, sourceEnd);
 Handle<Value> Buffer::Copy(const Arguments &args) {
   HandleScope scope;
@@ -734,6 +755,7 @@ void Buffer::Initialize(Handle<Object> target) {
   NODE_SET_PROTOTYPE_METHOD(constructor_template, "binaryWrite", Buffer::BinaryWrite);
   NODE_SET_PROTOTYPE_METHOD(constructor_template, "base64Write", Buffer::Base64Write);
   NODE_SET_PROTOTYPE_METHOD(constructor_template, "ucs2Write", Buffer::Ucs2Write);
+  NODE_SET_PROTOTYPE_METHOD(constructor_template, "fill", Buffer::Fill);
   NODE_SET_PROTOTYPE_METHOD(constructor_template, "copy", Buffer::Copy);
 
   NODE_SET_METHOD(constructor_template->GetFunction(),
diff --git a/src/node_buffer.h b/src/node_buffer.h
index 91f93dc1d0..e6d47452e9 100644
--- a/src/node_buffer.h
+++ b/src/node_buffer.h
@@ -117,6 +117,7 @@ class Buffer : public ObjectWrap {
   static v8::Handle<v8::Value> Ucs2Write(const v8::Arguments &args);
   static v8::Handle<v8::Value> ByteLength(const v8::Arguments &args);
   static v8::Handle<v8::Value> MakeFastBuffer(const v8::Arguments &args);
+  static v8::Handle<v8::Value> Fill(const v8::Arguments &args);
   static v8::Handle<v8::Value> Copy(const v8::Arguments &args);
 
   Buffer(v8::Handle<v8::Object> wrapper, size_t length);