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/*
*
* Copyright 2016 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#include <grpc/slice.h>
#include <grpc/support/alloc.h>
#include <nan.h>
#include <node.h>
#include "slice.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(
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
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