mirror of
https://github.com/RGBCube/serenity
synced 2025-10-31 21:12:43 +00:00
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/Utf8View.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
#include <LibJS/Runtime/Intl/Collator.h>
|
|
#include <LibJS/Runtime/Intl/CollatorCompareFunction.h>
|
|
|
|
namespace JS::Intl {
|
|
|
|
NonnullGCPtr<CollatorCompareFunction> CollatorCompareFunction::create(Realm& realm, Collator& collator)
|
|
{
|
|
return realm.heap().allocate<CollatorCompareFunction>(realm, realm, collator);
|
|
}
|
|
|
|
CollatorCompareFunction::CollatorCompareFunction(Realm& realm, Collator& collator)
|
|
: NativeFunction(*realm.intrinsics().function_prototype())
|
|
, m_collator(collator)
|
|
{
|
|
}
|
|
|
|
void CollatorCompareFunction::initialize(Realm&)
|
|
{
|
|
auto& vm = this->vm();
|
|
define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
|
|
define_direct_property(vm.names.name, PrimitiveString::create(vm, String {}), Attribute::Configurable);
|
|
}
|
|
|
|
// 10.3.3.2 CompareStrings ( collator, x, y ), https://tc39.es/ecma402/#sec-collator-comparestrings
|
|
double compare_strings(Collator& collator, Utf8View const& x, Utf8View const& y)
|
|
{
|
|
// FIXME: Implement https://unicode.org/reports/tr10
|
|
(void)collator;
|
|
auto x_iterator = x.begin();
|
|
auto y_iterator = y.begin();
|
|
for (; x_iterator != x.end() && y_iterator != y.end(); ++x_iterator, ++y_iterator) {
|
|
if (*x_iterator != *y_iterator)
|
|
return static_cast<double>(*x_iterator) - static_cast<double>(*y_iterator);
|
|
}
|
|
if (x_iterator != x.end())
|
|
return 1.0;
|
|
if (y_iterator != y.end())
|
|
return -1.0;
|
|
return 0.0;
|
|
}
|
|
|
|
// 10.3.3.1 Collator Compare Functions, https://tc39.es/ecma402/#sec-collator-compare-functions
|
|
ThrowCompletionOr<Value> CollatorCompareFunction::call()
|
|
{
|
|
auto& vm = this->vm();
|
|
|
|
// 1. Let collator be F.[[Collator]].
|
|
// 2. Assert: Type(collator) is Object and collator has an [[InitializedCollator]] internal slot.
|
|
// 3. If x is not provided, let x be undefined.
|
|
// 4. If y is not provided, let y be undefined.
|
|
|
|
// 5. Let X be ? ToString(x).
|
|
auto x = TRY(vm.argument(0).to_string(vm));
|
|
// 6. Let Y be ? ToString(y).
|
|
auto y = TRY(vm.argument(1).to_string(vm));
|
|
|
|
// 7. Return CompareStrings(collator, X, Y).
|
|
return compare_strings(m_collator, x.code_points(), y.code_points());
|
|
}
|
|
|
|
void CollatorCompareFunction::visit_edges(Visitor& visitor)
|
|
{
|
|
Base::visit_edges(visitor);
|
|
visitor.visit(&m_collator);
|
|
}
|
|
|
|
}
|