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// Copyright (c) 2012 The Chromium 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 "quiche/quic/core/quic_time.h"
#include <cinttypes>
#include <cstdlib>
#include <limits>
#include <string>
#include "absl/strings/str_cat.h"
namespace quic {
std::string QuicTime::Delta::ToDebuggingValue() const {
constexpr int64_t kMillisecondInMicroseconds = 1000;
constexpr int64_t kSecondInMicroseconds = 1000 * kMillisecondInMicroseconds;
int64_t absolute_value = std::abs(time_offset_);
// For debugging purposes, always display the value with the highest precision
// available.
if (absolute_value >= kSecondInMicroseconds &&
absolute_value % kSecondInMicroseconds == 0) {
return absl::StrCat(time_offset_ / kSecondInMicroseconds, "s");
}
if (absolute_value >= kMillisecondInMicroseconds &&
absolute_value % kMillisecondInMicroseconds == 0) {
return absl::StrCat(time_offset_ / kMillisecondInMicroseconds, "ms");
}
return absl::StrCat(time_offset_, "us");
}
uint64_t QuicWallTime::ToUNIXSeconds() const { return microseconds_ / 1000000; }
uint64_t QuicWallTime::ToUNIXMicroseconds() const { return microseconds_; }
bool QuicWallTime::IsAfter(QuicWallTime other) const {
return microseconds_ > other.microseconds_;
}
bool QuicWallTime::IsBefore(QuicWallTime other) const {
return microseconds_ < other.microseconds_;
}
bool QuicWallTime::IsZero() const { return microseconds_ == 0; }
QuicTime::Delta QuicWallTime::AbsoluteDifference(QuicWallTime other) const {
uint64_t d;
if (microseconds_ > other.microseconds_) {
d = microseconds_ - other.microseconds_;
} else {
d = other.microseconds_ - microseconds_;
}
if (d > static_cast<uint64_t>(std::numeric_limits<int64_t>::max())) {
d = std::numeric_limits<int64_t>::max();
}
return QuicTime::Delta::FromMicroseconds(d);
}
QuicWallTime QuicWallTime::Add(QuicTime::Delta delta) const {
uint64_t microseconds = microseconds_ + delta.ToMicroseconds();
if (microseconds < microseconds_) {
microseconds = std::numeric_limits<uint64_t>::max();
}
return QuicWallTime(microseconds);
}
// TODO(ianswett) Test this.
QuicWallTime QuicWallTime::Subtract(QuicTime::Delta delta) const {
uint64_t microseconds = microseconds_ - delta.ToMicroseconds();
if (microseconds > microseconds_) {
microseconds = 0;
}
return QuicWallTime(microseconds);
}
} // namespace quic