1 files changed, 102 insertions, 0 deletions
diff --git a/src/node/ext/slice.cc b/src/node/ext/slice.cc
new file mode 100644
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+++ b/src/node/ext/slice.cc
@@ -0,0 +1,102 @@
+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include <node.h>
+#include <nan.h>
+#include <grpc/slice.h>
+#include <grpc/support/alloc.h>
+
+#include "slice.h"
+#include "byte_buffer.h"
+
+namespace grpc {
+namespace node {
+
+using Nan::Persistent;
+
+using v8::Local;
+using v8::String;
+using v8::Value;
+
+namespace {
+void SliceFreeCallback(char *data, void *hint) {
+  grpc_slice *slice = reinterpret_cast<grpc_slice*>(hint);
+  grpc_slice_unref(*slice);
+  delete slice;
+}
+
+void string_destroy_func(void *user_data) {
+  delete reinterpret_cast<Nan::Utf8String*>(user_data);
+}
+
+void buffer_destroy_func(void *user_data) {
+  delete reinterpret_cast<PersistentValue*>(user_data);
+}
+} // namespace
+
+grpc_slice CreateSliceFromString(const Local<String> source) {
+  Nan::HandleScope scope;
+  Nan::Utf8String *utf8_value = new Nan::Utf8String(source);
+  return grpc_slice_new_with_user_data(**utf8_value, source->Length(),
+                                       string_destroy_func, utf8_value);
+}
+
+grpc_slice CreateSliceFromBuffer(const Local<Value> source) {
+  // Prerequisite: ::node::Buffer::HasInstance(source)
+  Nan::HandleScope scope;
+  return grpc_slice_new_with_user_data(::node::Buffer::Data(source),
+                                       ::node::Buffer::Length(source),
+                                       buffer_destroy_func,
+                                       new PersistentValue(source));
+}
+Local<String> CopyStringFromSlice(const grpc_slice slice) {
+  Nan::EscapableHandleScope scope;
+  if (GRPC_SLICE_LENGTH(slice) == 0) {
+    return scope.Escape(Nan::EmptyString());
+  }
+  return scope.Escape(Nan::New<String>(
+      const_cast<char *>(reinterpret_cast<const char *>(GRPC_SLICE_START_PTR(slice))),
+      GRPC_SLICE_LENGTH(slice)).ToLocalChecked());
+}
+
+Local<Value> CreateBufferFromSlice(const grpc_slice slice) {
+  Nan::EscapableHandleScope scope;
+  grpc_slice *slice_ptr = new grpc_slice;
+  *slice_ptr = grpc_slice_ref(slice);
+  return scope.Escape(MakeFastBuffer(Nan::NewBuffer(
+      const_cast<char *>(reinterpret_cast<const char *>(GRPC_SLICE_START_PTR(*slice_ptr))),
+      GRPC_SLICE_LENGTH(*slice_ptr), SliceFreeCallback, slice_ptr).ToLocalChecked()));
+}
+
+}  // namespace node
+}  // namespace grpc