80 lines
2.3 KiB
Java
80 lines
2.3 KiB
Java
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package android.system;
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import libcore.util.NonNull;
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import libcore.util.Objects;
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/**
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* Corresponds to C's {@code struct timeval} from {@code sys/time.h}.
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*/
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public final class StructTimeval {
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/** Seconds. */
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public final long tv_sec;
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/** Microseconds. */
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public final long tv_usec;
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private StructTimeval(long tv_sec, long tv_usec) {
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this.tv_sec = tv_sec;
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this.tv_usec = tv_usec;
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if (tv_usec < 0 || tv_usec > 999_999) {
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throw new IllegalArgumentException(
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"tv_usec value " + tv_usec + " is not in [0, 999999]");
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}
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}
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public static @NonNull StructTimeval fromMillis(long millis) {
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// tv_sec can be positive or negative. tv_usec can only be positive. Negative numbers are
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// represented by rounding down to the nearest whole second <= the one we need
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// (i.e. floor()) and adding the necessary micro seconds.
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long tv_sec = millis / 1000;
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if (tv_sec * 1000 > millis) {
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--tv_sec;
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}
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long tv_usec = (millis - (tv_sec * 1000)) * 1000;
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return new StructTimeval(tv_sec, tv_usec);
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}
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public long toMillis() {
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return (tv_sec * 1000) + (tv_usec / 1000);
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}
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@Override
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public String toString() {
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return Objects.toString(this);
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) {
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return true;
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}
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if (o == null || getClass() != o.getClass()) {
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return false;
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}
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StructTimeval that = (StructTimeval) o;
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return tv_sec == that.tv_sec &&
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tv_usec == that.tv_usec;
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}
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@Override
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public int hashCode() {
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return java.util.Objects.hash(tv_sec, tv_usec);
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}
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}
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