Remove go type limits constants

They can be retrieved directly from the std math package.
Slightly optimize the Fib functions and improve comments.

utils/consts.go

@@ -2840,15 +2840,6 @@ const (
 	HSuffix  = "h"
 )
 
-// Go type limits
-const (
-	AbsoluteMaxUint     = ^uint(0)
-	AbsoluteMinUint     = 0
-	AbsoluteMaxInt      = int(AbsoluteMaxUint >> 1)
-	AbsoluteMinInt      = -AbsoluteMaxInt - 1
-	AbsoluteMaxDuration = time.Duration(AbsoluteMaxInt)
-)
-
 func buildCacheInstRevPrefixes() {
 	CachePrefixToInstance = make(map[string]string)
 	for k, v := range CacheInstanceToPrefix {

utils/coreutils.go

@@ -484,8 +484,11 @@ func copyFile(rc io.ReadCloser, path string, fm os.FileMode) (err error) {
 func Fib() func() int {
 	a, b := 0, 1
 	return func() int {
-		if b > 0 { // only increment Fibonacci numbers while b doesn't overflow
-			a, b = b, a+b
+		a, b = b, a+b
+
+		// Prevent int overflow by keeping b as the maximum valid Fibonacci number.
+		if b < a {
+			b = a
 		}
 		return a
 	}
@@ -497,11 +500,15 @@ func FibDuration(durationUnit, maxDuration time.Duration) func() time.Duration {
 	fib := Fib()
 	return func() time.Duration {
 		fibNrAsDuration := time.Duration(fib())
-		if fibNrAsDuration > (AbsoluteMaxDuration / durationUnit) { // check if the current fibonacci nr. in the sequence would exceed the absolute maximum duration if multiplied by the duration unit value
-			fibNrAsDuration = AbsoluteMaxDuration
+
+		// Handle potential overflow when multiplying by durationUnit.
+		if fibNrAsDuration > (math.MaxInt / durationUnit) {
+			fibNrAsDuration = math.MaxInt
 		} else {
 			fibNrAsDuration *= durationUnit
 		}
+
+		// Cap the duration to maxDuration if specified.
 		if maxDuration > 0 && maxDuration < fibNrAsDuration {
 			return maxDuration
 		}

utils/coreutils_test.go

@@ -1872,12 +1872,12 @@ func TestCoreUtilsFibDurationSeqNrOverflow(t *testing.T) {
 		fib()
 	}
 	for i := 0; i < 100; i++ {
-		if rcv := fib(); rcv != AbsoluteMaxDuration {
-			t.Errorf("expected: <%+v>, \nreceived: <%+v>", AbsoluteMaxDuration, rcv)
+		if rcv := fib(); rcv != math.MaxInt {
+			t.Errorf("expected: <%+v>, \nreceived: <%+v>", math.MaxInt, rcv)
 		}
 	}
 	fib = FibDuration(time.Second, 6)
 	if rcv := fib(); rcv != 6 {
-		t.Errorf("expected: <%+v>, \nreceived: <%+v>", AbsoluteMaxDuration, rcv)
+		t.Errorf("expected: <%+v>, \nreceived: <%+v>", math.MaxInt, rcv)
 	}
 }