func (self *Writer) writeHeader(prefix byte, s seqio.Sequence) (n int, err error) {
var ln int
n, err = self.w.Write([]byte{prefix})
if err != nil {
return
}
ln, err = io.WriteString(self.w, *s.Name())
if n += ln; err != nil {
return
}
if desc := *s.Description(); len(desc) != 0 {
ln, err = self.w.Write([]byte{' '})
if n += ln; err != nil {
return
}
ln, err = io.WriteString(self.w, desc)
if n += ln; err != nil {
return
}
}
ln, err = self.w.Write([]byte("\n"))
n += ln
return
}
// Write a single sequence and return the number of bytes written and any error.
func (self *Writer) Write(s seqio.Sequence) (n int, err error) {
var (
ln, c int
prefix = append([]byte{'\n'}, self.SeqPrefix...)
)
id, desc := *s.Name(), *s.Description()
header := make([]byte, 0, len(self.IDPrefix)+len(id)+len(desc)+1)
header = append(header, self.IDPrefix...)
header = append(header, id...)
if len(desc) > 0 {
header = append(header, ' ')
header = append(header, desc...)
}
n, err = self.w.Write(header)
if err == nil {
for i := 0; i < s.Len(); i++ {
if i%self.Width == 0 {
ln, err = self.w.Write(prefix)
if n += ln; err != nil {
return
}
}
ln, err = self.w.Write([]byte{byte(s.At(seq.Position{Pos: i, Ind: c}).L)})
if n += ln; err != nil {
return
}
}
ln, err = self.w.Write([]byte{'\n'})
if n += ln; err != nil {
return
}
}
return
}