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/*
* Copyright 2022 Codeblog Corp. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// ^ that comment is required or the builtins generator will have a fit.
function from(items) {
"use strict";
if (!@isConstructor(this))
@throwTypeError("Buffer.from requires |this| to be a constructor");
if (@isUndefinedOrNull(items))
@throwTypeError(
"The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object.",
);
if (@argumentCount() === 1 && @isTypedArrayView(items)) {
var out = this.allocUnsafe(items.byteLength);
out.copy(items);
return out;
}
// TODO: figure out why private symbol not found
if (
typeof items === "string" ||
(typeof items === "object" &&
(@isTypedArrayView(items) ||
items instanceof ArrayBuffer ||
items instanceof SharedArrayBuffer ||
items instanceof @String))
) {
switch (@argumentCount()) {
case 1: {
return new this(items);
}
case 2: {
return new this(items, @argument(1));
}
default: {
return new this(items, @argument(1), @argument(2));
}
}
}
var arrayLike = @toObject(
items,
"The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object.",
);
if (!@isJSArray(arrayLike)) {
const toPrimitive = @tryGetByIdWithWellKnownSymbol(items, "toPrimitive");
if (toPrimitive) {
const primitive = toPrimitive.@call(items, "string");
if (typeof primitive === "string") {
switch (@argumentCount()) {
case 1: {
return new this(primitive);
}
case 2: {
return new this(primitive, @argument(1));
}
default: {
return new this(primitive, @argument(1), @argument(2));
}
}
}
}
if (!("length" in arrayLike) || @isCallable(arrayLike)) {
@throwTypeError(
"The first argument must be of type string or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object.",
);
}
}
// Don't pass the second argument because Node's Buffer.from doesn't accept
// a function and Uint8Array.from requires it if it exists
// That means we cannot use @tailCallFowrardArguments here, sadly
return new this(@Uint8Array.from(arrayLike).buffer);
}
|
