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// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This files contains runtime support implemented in JavaScript.
// CAUTION: Some of the functions specified in this file are called
// directly from compiled code. These are the functions with names in
// ALL CAPS. The compiled code passes the first argument in 'this'.
// The following declarations are shared with other native JS files.
// They are all declared at this one spot to avoid redeclaration errors.
(function(global, utils) {
%CheckIsBootstrapping();
var GlobalArray = global.Array;
var GlobalBoolean = global.Boolean;
var GlobalString = global.String;
var speciesSymbol;
utils.Import(function(from) {
speciesSymbol = from.species_symbol;
});
// ----------------------------------------------------------------------------
/* ---------------------------------
- - - U t i l i t i e s - - -
---------------------------------
*/
function ToPositiveInteger(x, rangeErrorIndex) {
var i = TO_INTEGER(x) + 0;
if (i < 0) throw %make_range_error(rangeErrorIndex);
return i;
}
function ToIndex(x, rangeErrorIndex) {
var i = TO_INTEGER(x) + 0;
if (i < 0 || i > kMaxSafeInteger) throw %make_range_error(rangeErrorIndex);
return i;
}
function MaxSimple(a, b) {
return a > b ? a : b;
}
function MinSimple(a, b) {
return a > b ? b : a;
}
%SetForceInlineFlag(MaxSimple);
%SetForceInlineFlag(MinSimple);
// ES2015 7.3.20
function SpeciesConstructor(object, defaultConstructor) {
var constructor = object.constructor;
if (IS_UNDEFINED(constructor)) {
return defaultConstructor;
}
if (!IS_RECEIVER(constructor)) {
throw %make_type_error(kConstructorNotReceiver);
}
var species = constructor[speciesSymbol];
if (IS_NULL_OR_UNDEFINED(species)) {
return defaultConstructor;
}
if (%IsConstructor(species)) {
return species;
}
throw %make_type_error(kSpeciesNotConstructor);
}
//----------------------------------------------------------------------------
// NOTE: Setting the prototype for Array must take place as early as
// possible due to code generation for array literals. When
// generating code for a array literal a boilerplate array is created
// that is cloned when running the code. It is essential that the
// boilerplate gets the right prototype.
%FunctionSetPrototype(GlobalArray, new GlobalArray(0));
// ----------------------------------------------------------------------------
// Exports
utils.Export(function(to) {
to.MaxSimple = MaxSimple;
to.MinSimple = MinSimple;
to.ToPositiveInteger = ToPositiveInteger;
to.ToIndex = ToIndex;
to.SpeciesConstructor = SpeciesConstructor;
});
})
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