func (q Query) Count(m hl7parser.Message) int {
if !q.HasSegmentOffset && !q.HasField {
return len(m.Segments(q.Segment))
}
s := m.Segment(q.Segment, q.SegmentOffset)
if !q.HasField {
return len(s)
}
if len(s) <= q.Field+1 {
return 0
}
f := s[q.Field+1]
if !q.HasFieldOffset && !q.HasComponent {
return len(f)
}
if len(f) <= q.FieldOffset {
return 0
}
fi := f[q.FieldOffset]
if !q.HasComponent {
return len(fi)
}
if len(fi) <= q.Component {
return 0
}
c := fi[q.Component]
if !q.HasSubComponent {
return len(c)
}
if len(c) <= q.SubComponent {
return 0
}
return 1
}
func (q Query) Get(m hl7parser.Message) (string, bool) {
s := m.Segment(q.Segment, q.SegmentOffset)
if len(s) <= q.Field+1 {
return "", false
}
f := s[q.Field+1]
if len(f) <= q.FieldOffset {
return "", false
}
fi := f[q.FieldOffset]
if len(fi) <= q.Component {
return "", false
}
c := fi[q.Component]
if len(c) <= q.SubComponent {
return "", false
}
return string(c[q.SubComponent]), true
}