Initial checkin of gRPC to third_party/

third_party/grpc/src/node/ext/byte_buffer.cc

+/*
+ *
+ * Copyright 2015-2016, 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 <string.h>
+
+#include <node.h>
+#include <nan.h>
+#include "grpc/grpc.h"
+#include "grpc/byte_buffer_reader.h"
+#include "grpc/support/slice.h"
+
+#include "byte_buffer.h"
+
+namespace grpc {
+namespace node {
+
+
+using v8::Context;
+using v8::Function;
+using v8::Local;
+using v8::Object;
+using v8::Number;
+using v8::Value;
+
+grpc_byte_buffer *BufferToByteBuffer(Local<Value> buffer) {
+  Nan::HandleScope scope;
+  int length = ::node::Buffer::Length(buffer);
+  char *data = ::node::Buffer::Data(buffer);
+  gpr_slice slice = gpr_slice_malloc(length);
+  memcpy(GPR_SLICE_START_PTR(slice), data, length);
+  grpc_byte_buffer *byte_buffer(grpc_raw_byte_buffer_create(&slice, 1));
+  gpr_slice_unref(slice);
+  return byte_buffer;
+}
+
+namespace {
+void delete_buffer(char *data, void *hint) { delete[] data; }
+}
+
+Local<Value> ByteBufferToBuffer(grpc_byte_buffer *buffer) {
+  Nan::EscapableHandleScope scope;
+  if (buffer == NULL) {
+    return scope.Escape(Nan::Null());
+  }
+  size_t length = grpc_byte_buffer_length(buffer);
+  char *result = new char[length];
+  size_t offset = 0;
+  grpc_byte_buffer_reader reader;
+  grpc_byte_buffer_reader_init(&reader, buffer);
+  gpr_slice next;
+  while (grpc_byte_buffer_reader_next(&reader, &next) != 0) {
+    memcpy(result + offset, GPR_SLICE_START_PTR(next), GPR_SLICE_LENGTH(next));
+    offset += GPR_SLICE_LENGTH(next);
+    gpr_slice_unref(next);
+  }
+  return scope.Escape(MakeFastBuffer(
+      Nan::NewBuffer(result, length, delete_buffer, NULL).ToLocalChecked()));
+}
+
+Local<Value> MakeFastBuffer(Local<Value> slowBuffer) {
+  Nan::EscapableHandleScope scope;
+  Local<Object> globalObj = Nan::GetCurrentContext()->Global();
+  Local<Function> bufferConstructor = Local<Function>::Cast(
+      globalObj->Get(Nan::New("Buffer").ToLocalChecked()));
+  Local<Value> consArgs[3] = {
+    slowBuffer,
+    Nan::New<Number>(::node::Buffer::Length(slowBuffer)),
+    Nan::New<Number>(0)
+  };
+  Local<Object> fastBuffer = bufferConstructor->NewInstance(3, consArgs);
+  return scope.Escape(fastBuffer);
+}
+}  // namespace node
+}  // namespace grpc