And remove it again

rr.go

@@ -1,89 +0,0 @@
-package dns
-
-import (
-	"strings"
-)
-
-// Helper functions
-
-// Only return those RR with the type t
-func SieveRR(rr []RR, t uint16) (l []RR) {
-	for _, r := range rr {
-		if r.Header().Rrtype == t {
-			l = append(l, r)
-		}
-	}
-	return
-}
-
-// DnameLength returns the length of a packed dname.
-func DomainNameLength(s string) int { // TODO better name
-	// Special case for '.'
-	if s == "." {
-		return 1
-	}
-
-	// Add trailing dot to canonicalize name.
-	if n := len(s); n == 0 || s[n-1] != '.' {
-		return n + 1
-	} else {
-		return n + 1
-	}
-	panic("not reached")
-	return 0
-}
-
-// Return a slice with the full name, one label shorter,
-// shorter, until we, hit the root
-// Each name is fully qualified.
-// The root labels is added as last
-func LabelSlice(s string) []string {
-	if s[len(s)-1] != '.' {
-		s += "."
-	}
-	ss := strings.Split(s, ".")
-	labels := make([]string, 0)
-	for i := 0; i < len(ss)-1; i++ {
-		labels = append(labels, strings.Join(ss[i:], "."))
-	}
-	labels = append(labels, ".")
-	return labels
-}
-
-// LabelSliceReverse reverse a label slice
-func LabelSliceReverse(l []string) []string {
-	for i, j := 0, len(l)-1; i < j; i, j = i+1, j-1 {
-		l[i], l[j] = l[j], l[i]
-	}
-	return l
-}
-
-// Labels returns i labels from the left side of the name. 
-// The counting start with 0. The returned names are fully
-// qualified.
-// So for "a.miek.nl." it returns [ a.miek.nl. miek.nl. nl. . ]
-func Labels(s string, i int) string {
-	ss := strings.Split(s, ".")
-	return strings.Join(ss[:i+1], ".")
-	// TODO fully qualified
-}
-
-// Labels returns the number of labels in a domain name.
-func LabelCount(a string) (c uint8) {
-	// walk the string and count the dots
-	// except when it is escaped
-	esc := false
-	for _, v := range a {
-		switch v {
-		case '.':
-			if esc {
-				esc = !esc
-				continue
-			}
-			c++
-		case '\\':
-			esc = true
-		}
-	}
-	return
-}