addon.cpp

/**
* @license Apache-2.0
*
* Copyright (c) 2018 The Stdlib 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.
*/

/**
* Test if a numeric value is positive zero.
*/
#include <nan.h>
#include "stdlib_base_is_positive_zero.h"

/**
* Add-on namespace.
*/
namespace addon_base_is_positive_zero {

	using Nan::FunctionCallbackInfo;
	using Nan::ThrowTypeError;
	using Nan::ThrowError;
	using v8::Boolean;
	using v8::Local;
	using v8::Value;

	/**
	* Tests if a numeric value is positive zero.
	*
	* When called from JavaScript, the function expects one argument:
	*
	* * __x__: a number.
	*
	* @param info   arguments
	*/
	void node_is_positive_zero( const FunctionCallbackInfo<Value>& info ) {
		if ( info.Length() != 1 ) {
			ThrowError( "invalid invocation. Must provide a number." );
			return;
		}
		if ( !info[ 0 ]->IsNumber() ) {
			info.GetReturnValue().Set( false );
			return;
		}
		const double x = info[ 0 ]->NumberValue();

		Local<Boolean> b = Nan::New( stdlib_base_is_positive_zero( x ) );
		info.GetReturnValue().Set( b );
	}

	NAN_MODULE_INIT( Init ) {
		Nan::Export( target, "isPositiveZero", node_is_positive_zero );
	}

	NODE_MODULE( addon, Init )
} // end namespace addon_base_is_positive_zero