// Copyright 2011 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
#ifndef V8_CONVERSIONS_H_
#define V8_CONVERSIONS_H_
+#include <limits>
+
+#include "checks.h"
+#include "handles.h"
+#include "objects.h"
#include "utils.h"
namespace v8 {
// Converts a string into a double value according to ECMA-262 9.3.1
double StringToDouble(UnicodeCache* unicode_cache,
- Vector<const char> str,
+ Vector<const uint8_t> str,
int flags,
double empty_string_val = 0);
double StringToDouble(UnicodeCache* unicode_cache,
int flags,
double empty_string_val = 0);
+// Converts a string into an integer.
+double StringToInt(UnicodeCache* unicode_cache,
+ Vector<const uint8_t> vector,
+ int radix);
+
+
+double StringToInt(UnicodeCache* unicode_cache,
+ Vector<const uc16> vector,
+ int radix);
+
const int kDoubleToCStringMinBufferSize = 100;
// Converts a double to a string value according to ECMA-262 9.8.1.
char* DoubleToPrecisionCString(double value, int f);
char* DoubleToRadixCString(double value, int radix);
+
+static inline bool IsMinusZero(double value) {
+ static const DoubleRepresentation minus_zero(-0.0);
+ return DoubleRepresentation(value) == minus_zero;
+}
+
+
+// Integer32 is an integer that can be represented as a signed 32-bit
+// integer. It has to be in the range [-2^31, 2^31 - 1].
+// We also have to check for negative 0 as it is not an Integer32.
+static inline bool IsInt32Double(double value) {
+ return !IsMinusZero(value) &&
+ value >= kMinInt &&
+ value <= kMaxInt &&
+ value == FastI2D(FastD2I(value));
+}
+
+
+// Convert from Number object to C integer.
+inline int32_t NumberToInt32(Object* number) {
+ if (number->IsSmi()) return Smi::cast(number)->value();
+ return DoubleToInt32(number->Number());
+}
+
+
+inline uint32_t NumberToUint32(Object* number) {
+ if (number->IsSmi()) return Smi::cast(number)->value();
+ return DoubleToUint32(number->Number());
+}
+
+
+double StringToDouble(UnicodeCache* unicode_cache,
+ String* string,
+ int flags,
+ double empty_string_val = 0.0);
+
+
+inline bool TryNumberToSize(Isolate* isolate,
+ Object* number, size_t* result) {
+ SealHandleScope shs(isolate);
+ if (number->IsSmi()) {
+ int value = Smi::cast(number)->value();
+ ASSERT(static_cast<unsigned>(Smi::kMaxValue)
+ <= std::numeric_limits<size_t>::max());
+ if (value >= 0) {
+ *result = static_cast<size_t>(value);
+ return true;
+ }
+ return false;
+ } else {
+ ASSERT(number->IsHeapNumber());
+ double value = HeapNumber::cast(number)->value();
+ if (value >= 0 &&
+ value <= std::numeric_limits<size_t>::max()) {
+ *result = static_cast<size_t>(value);
+ return true;
+ } else {
+ return false;
+ }
+ }
+}
+
+// Converts a number into size_t.
+inline size_t NumberToSize(Isolate* isolate,
+ Object* number) {
+ size_t result = 0;
+ bool is_valid = TryNumberToSize(isolate, number, &result);
+ CHECK(is_valid);
+ return result;
+}
+
} } // namespace v8::internal
#endif // V8_CONVERSIONS_H_