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/*
* Copyright 2018 Google
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#import <Foundation/Foundation.h>
NS_ASSUME_NONNULL_BEGIN
/**
* A Timestamp represents a point in time independent of any time zone or calendar, represented as
* seconds and fractions of seconds at nanosecond resolution in UTC Epoch time. It is encoded using
* the Proleptic Gregorian Calendar which extends the Gregorian calendar backwards to year one. It
* is encoded assuming all minutes are 60 seconds long, i.e. leap seconds are "smeared" so that no
* leap second table is needed for interpretation. Range is from 0001-01-01T00:00:00Z to
* 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to
* and from RFC 3339 date strings.
*
* @see https://github.com/google/protobuf/blob/master/src/google/protobuf/timestamp.proto for the
* reference timestamp definition.
*/
NS_SWIFT_NAME(Timestamp)
@interface FIRTimestamp : NSObject <NSCopying>
/** */
- (instancetype)init NS_UNAVAILABLE;
/**
* Creates a new timestamp.
*
* @param seconds the number of seconds since epoch.
* @param nanoseconds the number of nanoseconds after the seconds.
*/
- (instancetype)initWithSeconds:(int64_t)seconds
nanoseconds:(int32_t)nanoseconds NS_DESIGNATED_INITIALIZER;
/**
* Creates a new timestamp.
*
* @param seconds the number of seconds since epoch.
* @param nanoseconds the number of nanoseconds after the seconds.
*/
+ (instancetype)timestampWithSeconds:(int64_t)seconds nanoseconds:(int32_t)nanoseconds;
/** Creates a new timestamp from the given date. */
+ (instancetype)timestampWithDate:(NSDate *)date;
/** Creates a new timestamp with the current date / time. */
+ (instancetype)timestamp;
/** Returns a new NSDate corresponding to this timestamp. This may lose precision. */
- (NSDate *)dateValue;
- (NSComparisonResult)compare:(FIRTimestamp *)other;
/**
* Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.
* Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
*/
@property(nonatomic, assign, readonly) int64_t seconds;
/**
* Non-negative fractions of a second at nanosecond resolution. Negative second values with
* fractions must still have non-negative nanos values that count forward in time.
* Must be from 0 to 999,999,999 inclusive.
*/
@property(nonatomic, assign, readonly) int32_t nanoseconds;
@end
NS_ASSUME_NONNULL_END
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