ikan Uploader :
Directory : /proc/thread-self/root/home/ubuntu/node-v16.18.1/deps/v8/src/builtins/
Upload File : |
| Current File : //proc/thread-self/root/home/ubuntu/node-v16.18.1/deps/v8/src/builtins/builtins-number.cc |
// Copyright 2016 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/codegen/code-factory.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 {
// -----------------------------------------------------------------------------
// ES6 section 20.1 Number Objects
// ES6 section 20.1.3.2 Number.prototype.toExponential ( fractionDigits )
BUILTIN(NumberPrototypeToExponential) {
HandleScope scope(isolate);
Handle<Object> value = args.at(0);
Handle<Object> fraction_digits = args.atOrUndefined(isolate, 1);
// Unwrap the receiver {value}.
if (value->IsJSPrimitiveWrapper()) {
value = handle(Handle<JSPrimitiveWrapper>::cast(value)->value(), isolate);
}
if (!value->IsNumber()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotGeneric,
isolate->factory()->NewStringFromAsciiChecked(
"Number.prototype.toExponential"),
isolate->factory()->Number_string()));
}
double const value_number = value->Number();
// Convert the {fraction_digits} to an integer first.
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, fraction_digits, Object::ToInteger(isolate, fraction_digits));
double const fraction_digits_number = fraction_digits->Number();
if (std::isnan(value_number)) return ReadOnlyRoots(isolate).NaN_string();
if (std::isinf(value_number)) {
return (value_number < 0.0) ? ReadOnlyRoots(isolate).minus_Infinity_string()
: ReadOnlyRoots(isolate).Infinity_string();
}
if (fraction_digits_number < 0.0 ||
fraction_digits_number > kMaxFractionDigits) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kNumberFormatRange,
isolate->factory()->NewStringFromAsciiChecked(
"toExponential()")));
}
int const f = args.atOrUndefined(isolate, 1)->IsUndefined(isolate)
? -1
: static_cast<int>(fraction_digits_number);
char* const str = DoubleToExponentialCString(value_number, f);
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
// ES6 section 20.1.3.3 Number.prototype.toFixed ( fractionDigits )
BUILTIN(NumberPrototypeToFixed) {
HandleScope scope(isolate);
Handle<Object> value = args.at(0);
Handle<Object> fraction_digits = args.atOrUndefined(isolate, 1);
// Unwrap the receiver {value}.
if (value->IsJSPrimitiveWrapper()) {
value = handle(Handle<JSPrimitiveWrapper>::cast(value)->value(), isolate);
}
if (!value->IsNumber()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotGeneric,
isolate->factory()->NewStringFromAsciiChecked(
"Number.prototype.toFixed"),
isolate->factory()->Number_string()));
}
double const value_number = value->Number();
// Convert the {fraction_digits} to an integer first.
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
isolate, fraction_digits, Object::ToInteger(isolate, fraction_digits));
double const fraction_digits_number = fraction_digits->Number();
// Check if the {fraction_digits} are in the supported range.
if (fraction_digits_number < 0.0 ||
fraction_digits_number > kMaxFractionDigits) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kNumberFormatRange,
isolate->factory()->NewStringFromAsciiChecked(
"toFixed() digits")));
}
if (std::isnan(value_number)) return ReadOnlyRoots(isolate).NaN_string();
if (std::isinf(value_number)) {
return (value_number < 0.0) ? ReadOnlyRoots(isolate).minus_Infinity_string()
: ReadOnlyRoots(isolate).Infinity_string();
}
char* const str = DoubleToFixedCString(
value_number, static_cast<int>(fraction_digits_number));
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
// ES6 section 20.1.3.4 Number.prototype.toLocaleString ( [ r1 [ , r2 ] ] )
BUILTIN(NumberPrototypeToLocaleString) {
HandleScope scope(isolate);
const char* method = "Number.prototype.toLocaleString";
isolate->CountUsage(v8::Isolate::UseCounterFeature::kNumberToLocaleString);
Handle<Object> value = args.at(0);
// Unwrap the receiver {value}.
if (value->IsJSPrimitiveWrapper()) {
value = handle(Handle<JSPrimitiveWrapper>::cast(value)->value(), isolate);
}
// 1. Let x be ? thisNumberValue(this value)
if (!value->IsNumber()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate,
NewTypeError(MessageTemplate::kNotGeneric,
isolate->factory()->NewStringFromAsciiChecked(method),
isolate->factory()->Number_string()));
}
#ifdef V8_INTL_SUPPORT
RETURN_RESULT_OR_FAILURE(
isolate,
Intl::NumberToLocaleString(isolate, value, args.atOrUndefined(isolate, 1),
args.atOrUndefined(isolate, 2), method));
#else
// Turn the {value} into a String.
return *isolate->factory()->NumberToString(value);
#endif // V8_INTL_SUPPORT
}
// ES6 section 20.1.3.5 Number.prototype.toPrecision ( precision )
BUILTIN(NumberPrototypeToPrecision) {
HandleScope scope(isolate);
Handle<Object> value = args.at(0);
Handle<Object> precision = args.atOrUndefined(isolate, 1);
// Unwrap the receiver {value}.
if (value->IsJSPrimitiveWrapper()) {
value = handle(Handle<JSPrimitiveWrapper>::cast(value)->value(), isolate);
}
if (!value->IsNumber()) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotGeneric,
isolate->factory()->NewStringFromAsciiChecked(
"Number.prototype.toPrecision"),
isolate->factory()->Number_string()));
}
double const value_number = value->Number();
// If no {precision} was specified, just return ToString of {value}.
if (precision->IsUndefined(isolate)) {
return *isolate->factory()->NumberToString(value);
}
// Convert the {precision} to an integer first.
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, precision,
Object::ToInteger(isolate, precision));
double const precision_number = precision->Number();
if (std::isnan(value_number)) return ReadOnlyRoots(isolate).NaN_string();
if (std::isinf(value_number)) {
return (value_number < 0.0) ? ReadOnlyRoots(isolate).minus_Infinity_string()
: ReadOnlyRoots(isolate).Infinity_string();
}
if (precision_number < 1.0 || precision_number > kMaxFractionDigits) {
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewRangeError(MessageTemplate::kToPrecisionFormatRange));
}
char* const str = DoubleToPrecisionCString(
value_number, static_cast<int>(precision_number));
Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
DeleteArray(str);
return *result;
}
} // namespace internal
} // namespace v8
Kontol Shell Bypass