getpos.go

type Kmer uint32

func (self *Index) GetPositionsKmer(kmer Kmer) (positions []int, err os.Error) {
        if kmer > self.kMask {
                return nil, bio.NewError("Kmer out of range", 0, []Kmer{kmer, self.kMask})
        }

        i := Kmer(0)
        if kmer != 0 { // special case: An has no predecessor
                i = self.finger[kmer-1]
        }
        j := self.finger[kmer]
        if i == j {
                return
        }

        positions = make([]int, j-i)
        for l, p := range self.pos[i:j] {
                positions[l] = int(p)
        }

        return
}