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* @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.
*/
'use strict';
// MODULES //
var isObject = require( '@stdlib/assert/is-plain-object' );
var isUint8Array = require( '@stdlib/assert/is-uint8array' );
var instanceOf = require( '@stdlib/assert/instance-of' );
var readFileSync = require( '@stdlib/fs/read-file' ).sync;
var Uint8Array = require( '@stdlib/array/uint8' );
var format = require( '@stdlib/string/format' );
// MAIN //
/**
* Synchronously reads the entire contents of a WebAssembly file.
*
* @param {(string|Buffer|integer)} file - file path or file descriptor
* @param {Options} [options] - options
* @param {string} [options.flag] - file status flag
* @throws {TypeError} options argument must be an object
* @returns {(Uint8Array|Error)} file contents or an error
*
* @example
* var join = require( 'path' ).join;
* var instanceOf = require( '@stdlib/assert/instance-of' );
*
* var fpath = join( __dirname, 'foo.wasm' );
* var out = readWASMSync( fpath );
* if ( instanceOf( out, Error ) ) {
* throw out;
* }
* console.log( out );
*/
function readWASMSync( file, options ) {
var opts;
var out;
var f;
var i;
if ( arguments.length > 1 ) {
if ( !isObject( options ) ) {
throw new TypeError( format( 'invalid argument. Options argument must be an object. Value: `%s`.', options ) );
}
opts = options;
} else {
opts = {};
}
// Always override setting the encoding option, as wasm is a binary file format:
opts.encoding = null;
f = readFileSync( file, opts );
if ( instanceOf( f, Error ) ) {
return f;
}
if ( isUint8Array( f ) ) {
return f;
}
// Handle older Node.js environments where Buffer objects are not Uint8Arrays...
out = new Uint8Array( f.length );
for ( i = 0; i < f.length; i++ ) {
out[ i ] = f[ i ];
}
return out;
}
// EXPORTS //
module.exports = readWASMSync;
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