github.com/tumi8/quic-go@v0.37.4-tum/noninternal/utils/minmax.go (about)

     1  package utils
     2  
     3  import (
     4  	"math"
     5  	"time"
     6  
     7  	"golang.org/x/exp/constraints"
     8  )
     9  
    10  // InfDuration is a duration of infinite length
    11  const InfDuration = time.Duration(math.MaxInt64)
    12  
    13  func Max[T constraints.Ordered](a, b T) T {
    14  	if a < b {
    15  		return b
    16  	}
    17  	return a
    18  }
    19  
    20  func Min[T constraints.Ordered](a, b T) T {
    21  	if a < b {
    22  		return a
    23  	}
    24  	return b
    25  }
    26  
    27  // MinNonZeroDuration return the minimum duration that's not zero.
    28  func MinNonZeroDuration(a, b time.Duration) time.Duration {
    29  	if a == 0 {
    30  		return b
    31  	}
    32  	if b == 0 {
    33  		return a
    34  	}
    35  	return Min(a, b)
    36  }
    37  
    38  // AbsDuration returns the absolute value of a time duration
    39  func AbsDuration(d time.Duration) time.Duration {
    40  	if d >= 0 {
    41  		return d
    42  	}
    43  	return -d
    44  }
    45  
    46  // MinTime returns the earlier time
    47  func MinTime(a, b time.Time) time.Time {
    48  	if a.After(b) {
    49  		return b
    50  	}
    51  	return a
    52  }
    53  
    54  // MinNonZeroTime returns the earlist time that is not time.Time{}
    55  // If both a and b are time.Time{}, it returns time.Time{}
    56  func MinNonZeroTime(a, b time.Time) time.Time {
    57  	if a.IsZero() {
    58  		return b
    59  	}
    60  	if b.IsZero() {
    61  		return a
    62  	}
    63  	return MinTime(a, b)
    64  }
    65  
    66  // MaxTime returns the later time
    67  func MaxTime(a, b time.Time) time.Time {
    68  	if a.After(b) {
    69  		return a
    70  	}
    71  	return b
    72  }