addon.cpp (2178B)
1 /** 2 * @license Apache-2.0 3 * 4 * Copyright (c) 2020 The Stdlib Authors. 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 19 #include "stdlib/math/base/assert/is_nanf.h" 20 #include <node_api.h> 21 #include <stdint.h> 22 #include <assert.h> 23 24 /** 25 * Add-on namespace. 26 */ 27 namespace stdlib_math_base_assert_is_nanf { 28 29 /** 30 * Tests if a single-precision floating-point numeric value is `NaN`. 31 * 32 * ## Notes 33 * 34 * - When called from JavaScript, the function expects one argument: 35 * 36 * - `x`: a number 37 */ 38 napi_value node_is_nanf( napi_env env, napi_callback_info info ) { 39 napi_status status; 40 41 size_t argc = 1; 42 napi_value argv[ 1 ]; 43 status = napi_get_cb_info( env, info, &argc, argv, nullptr, nullptr ); 44 assert( status == napi_ok ); 45 46 if ( argc < 1 ) { 47 napi_throw_error( env, nullptr, "invalid invocation. Must provide a number." ); 48 return nullptr; 49 } 50 51 napi_valuetype vtype0; 52 status = napi_typeof( env, argv[ 0 ], &vtype0 ); 53 assert( status == napi_ok ); 54 55 napi_value v; 56 double x; 57 if ( vtype0 == napi_number ) { 58 status = napi_get_value_double( env, argv[ 0 ], &x ); 59 assert( status == napi_ok ); 60 61 status = napi_create_int32( env, (int32_t)stdlib_base_is_nanf( (float)x ), &v ); 62 assert( status == napi_ok ); 63 } else { 64 status = napi_create_int32( env, 0, &v ); 65 assert( status == napi_ok ); 66 } 67 68 return v; 69 } 70 71 napi_value Init( napi_env env, napi_value exports ) { 72 napi_status status; 73 napi_value fcn; 74 status = napi_create_function( env, "exports", NAPI_AUTO_LENGTH, node_is_nanf, NULL, &fcn ); 75 assert( status == napi_ok ); 76 return fcn; 77 } 78 79 NAPI_MODULE( NODE_GYP_MODULE_NAME, Init ) 80 } // end namespace stdlib_math_base_assert_is_nanf