obitools4/pkg/obiseq/revcomp.go

package obiseq

//                          ".ABCDEFGHIJKLMNOPQRSTUVWXYZ#![]"
var __revcmp_dna__ = []byte(".TVGHEFCDIJMLKNOPQYSAABWXRZ#!][")

// Reverse complements a DNA sequence.
// If the inplace parametter is true, that operation is done in place.
func (sequence BioSequence) ReverseComplement(inplace bool) BioSequence {

	if !inplace {
		sequence = sequence.Copy()
	}

	s := sequence.sequence.sequence.Bytes()

	for i, j := sequence.Length()-1, 0; i >= j; i-- {

		s[j], s[i] = __revcmp_dna__[s[i]&31]|(s[i]&0x20),
			__revcmp_dna__[s[j]&31]|(s[j]&0x20)
		j++
	}

	sequence.sequence.id.WriteString("_revcomp")

	return sequence
}