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-rw-r--r--deps/v8/src/builtins/builtins-number.cc235
1 files changed, 235 insertions, 0 deletions
diff --git a/deps/v8/src/builtins/builtins-number.cc b/deps/v8/src/builtins/builtins-number.cc
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+++ b/deps/v8/src/builtins/builtins-number.cc
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+// 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.h"
+#include "src/builtins/builtins-utils.h"
+
+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<Object>(0);
+ Handle<Object> fraction_digits = args.atOrUndefined(isolate, 1);
+
+ // Unwrap the receiver {value}.
+ if (value->IsJSValue()) {
+ value = handle(Handle<JSValue>::cast(value)->value(), isolate);
+ }
+ if (!value->IsNumber()) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewTypeError(MessageTemplate::kNotGeneric,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "Number.prototype.toExponential")));
+ }
+ 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 isolate->heap()->nan_string();
+ if (std::isinf(value_number)) {
+ return (value_number < 0.0) ? isolate->heap()->minus_infinity_string()
+ : isolate->heap()->infinity_string();
+ }
+ if (fraction_digits_number < 0.0 || fraction_digits_number > 20.0) {
+ 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<Object>(0);
+ Handle<Object> fraction_digits = args.atOrUndefined(isolate, 1);
+
+ // Unwrap the receiver {value}.
+ if (value->IsJSValue()) {
+ value = handle(Handle<JSValue>::cast(value)->value(), isolate);
+ }
+ if (!value->IsNumber()) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewTypeError(MessageTemplate::kNotGeneric,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "Number.prototype.toFixed")));
+ }
+ 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 > 20.0) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewRangeError(MessageTemplate::kNumberFormatRange,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "toFixed() digits")));
+ }
+
+ if (std::isnan(value_number)) return isolate->heap()->nan_string();
+ if (std::isinf(value_number)) {
+ return (value_number < 0.0) ? isolate->heap()->minus_infinity_string()
+ : isolate->heap()->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);
+ Handle<Object> value = args.at<Object>(0);
+
+ // Unwrap the receiver {value}.
+ if (value->IsJSValue()) {
+ value = handle(Handle<JSValue>::cast(value)->value(), isolate);
+ }
+ if (!value->IsNumber()) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewTypeError(MessageTemplate::kNotGeneric,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "Number.prototype.toLocaleString")));
+ }
+
+ // Turn the {value} into a String.
+ return *isolate->factory()->NumberToString(value);
+}
+
+// ES6 section 20.1.3.5 Number.prototype.toPrecision ( precision )
+BUILTIN(NumberPrototypeToPrecision) {
+ HandleScope scope(isolate);
+ Handle<Object> value = args.at<Object>(0);
+ Handle<Object> precision = args.atOrUndefined(isolate, 1);
+
+ // Unwrap the receiver {value}.
+ if (value->IsJSValue()) {
+ value = handle(Handle<JSValue>::cast(value)->value(), isolate);
+ }
+ if (!value->IsNumber()) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewTypeError(MessageTemplate::kNotGeneric,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "Number.prototype.toPrecision")));
+ }
+ 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 isolate->heap()->nan_string();
+ if (std::isinf(value_number)) {
+ return (value_number < 0.0) ? isolate->heap()->minus_infinity_string()
+ : isolate->heap()->infinity_string();
+ }
+ if (precision_number < 1.0 || precision_number > 21.0) {
+ 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;
+}
+
+// ES6 section 20.1.3.6 Number.prototype.toString ( [ radix ] )
+BUILTIN(NumberPrototypeToString) {
+ HandleScope scope(isolate);
+ Handle<Object> value = args.at<Object>(0);
+ Handle<Object> radix = args.atOrUndefined(isolate, 1);
+
+ // Unwrap the receiver {value}.
+ if (value->IsJSValue()) {
+ value = handle(Handle<JSValue>::cast(value)->value(), isolate);
+ }
+ if (!value->IsNumber()) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewTypeError(MessageTemplate::kNotGeneric,
+ isolate->factory()->NewStringFromAsciiChecked(
+ "Number.prototype.toString")));
+ }
+ double const value_number = value->Number();
+
+ // If no {radix} was specified, just return ToString of {value}.
+ if (radix->IsUndefined(isolate)) {
+ return *isolate->factory()->NumberToString(value);
+ }
+
+ // Convert the {radix} to an integer first.
+ ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, radix,
+ Object::ToInteger(isolate, radix));
+ double const radix_number = radix->Number();
+
+ // If {radix} is 10, just return ToString of {value}.
+ if (radix_number == 10.0) return *isolate->factory()->NumberToString(value);
+
+ // Make sure the {radix} is within the valid range.
+ if (radix_number < 2.0 || radix_number > 36.0) {
+ THROW_NEW_ERROR_RETURN_FAILURE(
+ isolate, NewRangeError(MessageTemplate::kToRadixFormatRange));
+ }
+
+ // Fast case where the result is a one character string.
+ if (IsUint32Double(value_number) && value_number < radix_number) {
+ // Character array used for conversion.
+ static const char kCharTable[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+ return *isolate->factory()->LookupSingleCharacterStringFromCode(
+ kCharTable[static_cast<uint32_t>(value_number)]);
+ }
+
+ // Slow case.
+ if (std::isnan(value_number)) return isolate->heap()->nan_string();
+ if (std::isinf(value_number)) {
+ return (value_number < 0.0) ? isolate->heap()->minus_infinity_string()
+ : isolate->heap()->infinity_string();
+ }
+ char* const str =
+ DoubleToRadixCString(value_number, static_cast<int>(radix_number));
+ Handle<String> result = isolate->factory()->NewStringFromAsciiChecked(str);
+ DeleteArray(str);
+ return *result;
+}
+
+// ES6 section 20.1.3.7 Number.prototype.valueOf ( )
+void Builtins::Generate_NumberPrototypeValueOf(CodeStubAssembler* assembler) {
+ typedef compiler::Node Node;
+
+ Node* receiver = assembler->Parameter(0);
+ Node* context = assembler->Parameter(3);
+
+ Node* result = assembler->ToThisValue(
+ context, receiver, PrimitiveType::kNumber, "Number.prototype.valueOf");
+ assembler->Return(result);
+}
+
+} // namespace internal
+} // namespace v8
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