Add a reverse complement worker

pkg/obiseq/revcomp.go

@@ -1,6 +1,6 @@
 package obiseq
 
-//                          ".ABCDEFGHIJKLMNOPQRSTUVWXYZ#![]"
+// ".ABCDEFGHIJKLMNOPQRSTUVWXYZ#![]"
 var __revcmp_dna__ = []byte(".TVGHEFCDIJMLKNOPQYSAABWXRZ#!][")
 
 // Reverse complements a DNA sequence.
@@ -20,5 +20,13 @@ func (sequence *BioSequence) ReverseComplement(inplace bool) *BioSequence {
 		j++
 	}
 
+	if sequence.HasQualities() {
+		s := sequence.qualities
+		for i, j := sequence.Length()-1, 0; i >= j; i-- {
+			s[j], s[i] = s[i], s[j]
+			j++
+		}
+	}
+
 	return sequence
 }