time-to-botec

Benchmark sampling in different programming languages
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async.js (2852B)

      1 /**
      2 * @license Apache-2.0
      3 *
      4 * Copyright (c) 2018 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 'use strict';
     20 
     21 // MODULES //
     22 
     23 var isObject = require( '@stdlib/assert/is-plain-object' );
     24 var isFunction = require( '@stdlib/assert/is-function' );
     25 var isUint8Array = require( '@stdlib/assert/is-uint8array' );
     26 var readFile = require( './../../read-file' );
     27 var Uint8Array = require( '@stdlib/array/uint8' );
     28 
     29 
     30 // MAIN //
     31 
     32 /**
     33 * Reads the entire contents of a WebAssembly file.
     34 *
     35 * @param {(string|Buffer|integer)} file - file path or file descriptor
     36 * @param {Options} [options] - options
     37 * @param {string} [options.flag] - file status flag
     38 * @param {Callback} clbk - callback to invoke after reading a file
     39 * @throws {TypeError} options argument must be an object
     40 * @throws {TypeError} callback argument must be a function
     41 *
     42 * @example
     43 * var join = require( 'path' ).join;
     44 * var instanceOf = require( '@stdlib/assert/instance-of' );
     45 *
     46 * var fpath = join( __dirname, 'foo.wasm' );
     47 * readWASM( fpath, onRead );
     48 *
     49 * function onRead( error, buf ) {
     50 *     if ( error ) {
     51 *         throw error;
     52 *     }
     53 *     console.log( buf );
     54 * }
     55 */
     56 function readWASM( file, options, clbk ) {
     57 	var opts;
     58 	var done;
     59 	if ( arguments.length < 3 ) {
     60 		opts = {};
     61 		done = options;
     62 	} else {
     63 		if ( !isObject( options ) ) {
     64 			throw new TypeError( 'invalid argument. Options argument must be an object. Value: `' + options + '`.' );
     65 		}
     66 		opts = options;
     67 		done = clbk;
     68 	}
     69 	if ( !isFunction( done ) ) {
     70 		throw new TypeError( 'invalid argument. Callback argument must be a function. Value: `' + done + '`.' );
     71 	}
     72 	// Always override setting the encoding option, as wasm is a binary file format:
     73 	opts.encoding = null;
     74 	readFile( file, opts, onRead );
     75 
     76 	/**
     77 	* Callback invoked upon reading a file.
     78 	*
     79 	* @private
     80 	* @param {(Error|null)} error - error object
     81 	* @param {(Buffer|string)} file - file contents
     82 	* @returns {void}
     83 	*/
     84 	function onRead( error, file ) {
     85 		var out;
     86 		var i;
     87 		if ( error ) {
     88 			return done( error );
     89 		}
     90 		if ( isUint8Array( file ) ) {
     91 			return done( null, file );
     92 		}
     93 		// Handle older Node.js environments where Buffer objects are not Uint8Arrays...
     94 		out = new Uint8Array( file.length );
     95 		for ( i = 0; i < file.length; i++ ) {
     96 			out[ i ] = file[ i ];
     97 		}
     98 		done( null, out );
     99 	}
    100 }
    101 
    102 
    103 // EXPORTS //
    104 
    105 module.exports = readWASM;