81 lines
2.1 KiB
C++
81 lines
2.1 KiB
C++
/**
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* @license Apache-2.0
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*
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* Copyright (c) 2018 The Stdlib Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "stdlib/math/base/assert/is_nan.h"
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#include <node_api.h>
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#include <stdint.h>
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#include <assert.h>
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/**
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* Add-on namespace.
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*/
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namespace stdlib_math_base_assert_is_nan {
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/**
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* Tests if a double-precision floating-point numeric value is `NaN`.
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*
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* ## Notes
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*
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* - When called from JavaScript, the function expects one argument:
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*
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* - `x`: a number
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*/
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napi_value node_is_nan( napi_env env, napi_callback_info info ) {
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napi_status status;
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size_t argc = 1;
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napi_value argv[ 1 ];
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status = napi_get_cb_info( env, info, &argc, argv, nullptr, nullptr );
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assert( status == napi_ok );
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if ( argc < 1 ) {
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napi_throw_error( env, nullptr, "invalid invocation. Must provide a number." );
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return nullptr;
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}
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napi_valuetype vtype0;
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status = napi_typeof( env, argv[ 0 ], &vtype0 );
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assert( status == napi_ok );
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napi_value v;
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double x;
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if ( vtype0 == napi_number ) {
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status = napi_get_value_double( env, argv[ 0 ], &x );
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assert( status == napi_ok );
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status = napi_create_int32( env, (int32_t)stdlib_base_is_nan( x ), &v );
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assert( status == napi_ok );
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} else {
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status = napi_create_int32( env, 0, &v );
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assert( status == napi_ok );
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}
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return v;
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}
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napi_value Init( napi_env env, napi_value exports ) {
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napi_status status;
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napi_value fcn;
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status = napi_create_function( env, "exports", NAPI_AUTO_LENGTH, node_is_nan, NULL, &fcn );
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assert( status == napi_ok );
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return fcn;
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}
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NAPI_MODULE( NODE_GYP_MODULE_NAME, Init )
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} // end namespace stdlib_math_base_assert_is_nan
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