// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_UTILS_INL_H_
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#define V8_UTILS_INL_H_
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#include "src/utils.h"
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#include "include/v8-platform.h"
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#include "src/base/platform/time.h"
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#include "src/char-predicates-inl.h"
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#include "src/v8.h"
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namespace v8 {
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namespace internal {
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class TimedScope {
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public:
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explicit TimedScope(double* result)
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: start_(TimestampMs()), result_(result) {}
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~TimedScope() { *result_ = TimestampMs() - start_; }
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private:
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static inline double TimestampMs() {
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return V8::GetCurrentPlatform()->MonotonicallyIncreasingTime() *
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static_cast<double>(base::Time::kMillisecondsPerSecond);
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}
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double start_;
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double* result_;
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};
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template <typename Stream>
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bool StringToArrayIndex(Stream* stream, uint32_t* index) {
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uint16_t ch = stream->GetNext();
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// If the string begins with a '0' character, it must only consist
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// of it to be a legal array index.
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if (ch == '0') {
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*index = 0;
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return !stream->HasMore();
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}
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// Convert string to uint32 array index; character by character.
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if (!IsDecimalDigit(ch)) return false;
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int d = ch - '0';
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uint32_t result = d;
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while (stream->HasMore()) {
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ch = stream->GetNext();
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if (!IsDecimalDigit(ch)) return false;
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d = ch - '0';
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// Check that the new result is below the 32 bit limit.
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if (result > 429496729U - ((d + 3) >> 3)) return false;
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result = (result * 10) + d;
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}
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*index = result;
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return true;
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_UTILS_INL_H_
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