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// Copyright 2017 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.
#include "src/builtins/builtins-utils-inl.h"
#include "src/builtins/builtins.h"
#include "src/logging/counters.h"
#include "src/numbers/conversions.h"
#include "src/objects/objects-inl.h"
#ifdef V8_INTL_SUPPORT
#include "src/objects/intl-objects.h"
#endif
namespace v8 {
namespace internal {
BUILTIN(BigIntConstructor) {
HandleScope scope(isolate);
if (!args.new_target()->IsUndefined(isolate)) { // [[Construct]]
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotConstructor,
isolate->factory()->BigInt_string()));
}
// [[Call]]
Handle<Object> value = args.atOrUndefined(isolate, 1);
if (value->IsJSReceiver()) {
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, value,
JSReceiver::ToPrimitive(Handle<JSReceiver>::cast(value),
ToPrimitiveHint::kNumber));
}
if (value->IsNumber()) {
RETURN_RESULT_OR_FAILURE(isolate, BigInt::FromNumber(isolate, value));
} else {
RETURN_RESULT_OR_FAILURE(isolate, BigInt::FromObject(isolate, value));
}
}
BUILTIN(BigIntAsUintN) {
HandleScope scope(isolate);
Handle<Object> bits_obj = args.atOrUndefined(isolate, 1);
Handle<Object> bigint_obj = args.atOrUndefined(isolate, 2);
Handle<Object> bits;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, bits,
Object::ToIndex(isolate, bits_obj, MessageTemplate::kInvalidIndex));
Handle<BigInt> bigint;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, bigint,
BigInt::FromObject(isolate, bigint_obj));
RETURN_RESULT_OR_FAILURE(isolate,
BigInt::AsUintN(isolate, bits->Number(), bigint));
}
BUILTIN(BigIntAsIntN) {
HandleScope scope(isolate);
Handle<Object> bits_obj = args.atOrUndefined(isolate, 1);
Handle<Object> bigint_obj = args.atOrUndefined(isolate, 2);
Handle<Object> bits;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, bits,
Object::ToIndex(isolate, bits_obj, MessageTemplate::kInvalidIndex));
Handle<BigInt> bigint;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, bigint,
BigInt::FromObject(isolate, bigint_obj));
return *BigInt::AsIntN(isolate, bits->Number(), bigint);
}
namespace {
MaybeHandle<BigInt> ThisBigIntValue(Isolate* isolate, Handle<Object> value,
const char* caller) {
// 1. If Type(value) is BigInt, return value.
if (value->IsBigInt()) return Handle<BigInt>::cast(value);
// 2. If Type(value) is Object and value has a [[BigIntData]] internal slot:
if (value->IsJSPrimitiveWrapper()) {
// 2a. Assert: value.[[BigIntData]] is a BigInt value.
// 2b. Return value.[[BigIntData]].
Object data = JSPrimitiveWrapper::cast(*value).value();
if (data.IsBigInt()) return handle(BigInt::cast(data), isolate);
}
// 3. Throw a TypeError exception.
THROW_NEW_ERROR(
isolate,
NewTypeError(MessageTemplate::kNotGeneric,
isolate->factory()->NewStringFromAsciiChecked(caller),
isolate->factory()->NewStringFromStaticChars("BigInt")),
BigInt);
}
Object BigIntToStringImpl(Handle<Object> receiver, Handle<Object> radix,
Isolate* isolate, const char* builtin_name) {
// 1. Let x be ? thisBigIntValue(this value).
Handle<BigInt> x;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, x, ThisBigIntValue(isolate, receiver, builtin_name));
// 2. If radix is not present, let radixNumber be 10.
// 3. Else if radix is undefined, let radixNumber be 10.
int radix_number = 10;
if (!radix->IsUndefined(isolate)) {
// 4. Else, let radixNumber be ? ToInteger(radix).
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, radix,
Object::ToInteger(isolate, radix));
double radix_double = radix->Number();
// 5. If radixNumber < 2 or radixNumber > 36, throw a RangeError exception.
if (radix_double < 2 || radix_double > 36) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kToRadixFormatRange));
}
radix_number = static_cast<int>(radix_double);
}
// Return the String representation of this Number value using the radix
// specified by radixNumber.
RETURN_RESULT_OR_FAILURE(isolate, BigInt::ToString(isolate, x, radix_number));
}
} // namespace
BUILTIN(BigIntPrototypeToLocaleString) {
HandleScope scope(isolate);
#ifdef V8_INTL_SUPPORT
if (FLAG_harmony_intl_bigint) {
// 1. Let x be ? thisBigIntValue(this value).
Handle<BigInt> x;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, x,
ThisBigIntValue(isolate, args.receiver(),
"BigInt.prototype.toLocaleString"));
RETURN_RESULT_OR_FAILURE(
isolate,
Intl::NumberToLocaleString(isolate, x, args.atOrUndefined(isolate, 1),
args.atOrUndefined(isolate, 2)));
}
// Fallbacks to old toString implemention if flag is off or no
// V8_INTL_SUPPORT
#endif // V8_INTL_SUPPORT
Handle<Object> radix = isolate->factory()->undefined_value();
return BigIntToStringImpl(args.receiver(), radix, isolate,
"BigInt.prototype.toLocaleString");
}
BUILTIN(BigIntPrototypeToString) {
HandleScope scope(isolate);
Handle<Object> radix = args.atOrUndefined(isolate, 1);
return BigIntToStringImpl(args.receiver(), radix, isolate,
"BigInt.prototype.toString");
}
BUILTIN(BigIntPrototypeValueOf) {
HandleScope scope(isolate);
RETURN_RESULT_OR_FAILURE(
isolate,
ThisBigIntValue(isolate, args.receiver(), "BigInt.prototype.valueOf"));
}
} // namespace internal
} // namespace v8
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