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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.
#ifndef V8_UTILS_INL_H_
#define V8_UTILS_INL_H_
#include "src/utils.h"
#include "include/v8-platform.h"
#include "src/base/platform/time.h"
#include "src/char-predicates-inl.h"
#include "src/v8.h"
namespace v8 {
namespace internal {
class TimedScope {
public:
explicit TimedScope(double* result)
: start_(TimestampMs()), result_(result) {}
~TimedScope() { *result_ = TimestampMs() - start_; }
private:
static inline double TimestampMs() {
return V8::GetCurrentPlatform()->MonotonicallyIncreasingTime() *
static_cast<double>(base::Time::kMillisecondsPerSecond);
}
double start_;
double* result_;
};
template <typename Stream>
bool StringToArrayIndex(Stream* stream, uint32_t* index) {
uint16_t ch = stream->GetNext();
// If the string begins with a '0' character, it must only consist
// of it to be a legal array index.
if (ch == '0') {
*index = 0;
return !stream->HasMore();
}
// Convert string to uint32 array index; character by character.
if (!IsDecimalDigit(ch)) return false;
int d = ch - '0';
uint32_t result = d;
while (stream->HasMore()) {
ch = stream->GetNext();
if (!IsDecimalDigit(ch)) return false;
d = ch - '0';
// Check that the new result is below the 32 bit limit.
if (result > 429496729U - ((d + 3) >> 3)) return false;
result = (result * 10) + d;
}
*index = result;
return true;
}
} // namespace internal
} // namespace v8
#endif // V8_UTILS_INL_H_
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