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* @license Apache-2.0
*
* Copyright (c) 2024 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 isTypedArray = require( '@stdlib/assert/is-typed-array' );
var isComplexTypedArray = require( '@stdlib/assert/is-complex-typed-array' );
var isBooleanArray = require( '@stdlib/assert/is-booleanarray' );
var reinterpret64 = require( '@stdlib/strided/base/reinterpret-complex64' );
var reinterpret128 = require( '@stdlib/strided/base/reinterpret-complex128' );
var reinterpretBoolean = require( '@stdlib/strided/base/reinterpret-boolean' );
var format = require( '@stdlib/string/format' );
var typeName = require( './type.js' );
// MAIN //
/**
* Returns a JSON representation of a typed array.
*
* ## Notes
*
* - We build a JSON object representing a typed array similar to how Node.js `Buffer` objects are represented. See [Buffer][1].
*
* [1]: https://nodejs.org/api/buffer.html#buffer_buf_tojson
*
* @param {TypedArray} arr - typed array to serialize
* @throws {TypeError} first argument must be a typed array
* @returns {Object} JSON representation
*
* @example
* var Float64Array = require( '@stdlib/array/float64' );
*
* var arr = new Float64Array( [ 5.0, 3.0 ] );
* var json = typedarray2json( arr );
* // returns { 'type': 'Float64Array', 'data': [ 5.0, 3.0 ] }
*/
function typedarray2json( arr ) {
var data;
var out;
var i;
if ( isTypedArray( arr ) ) {
data = arr;
} else if ( isComplexTypedArray( arr ) ) {
if ( arr.BYTES_PER_ELEMENT === 8 ) {
data = reinterpret64( arr, 0 );
} else { // arr.BYTES_PER_ELEMENT === 16
data = reinterpret128( arr, 0 );
}
} else if ( isBooleanArray( arr ) ) {
data = reinterpretBoolean( arr, 0 );
} else {
throw new TypeError( format( 'invalid argument. Must provide a typed array. Value: `%s`.', arr ) );
}
out = {
'type': typeName( arr ),
'data': []
};
for ( i = 0; i < data.length; i++ ) {
out.data.push( data[ i ] );
}
return out;
}
// EXPORTS //
module.exports = typedarray2json;
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