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@@ -990,12 +990,13 @@ pub enum PileBase {
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/// Decode one HTSlib 4-bit nucleotide (0=A,1=C,2=G,3=T,4=N, …) to `PileBase`
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#[inline]
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-fn decode(nibble: u8) -> PileBase {
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- match nibble & 0x0f {
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- 0 => PileBase::A,
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- 1 => PileBase::C,
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- 2 => PileBase::G,
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- 3 => PileBase::T,
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+fn decode(n: u8) -> PileBase {
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+ match n & 0x0f {
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+ 1 => PileBase::A,
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+ 2 => PileBase::C,
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+ 4 => PileBase::G,
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+ 8 => PileBase::T,
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+ 15 => PileBase::N, // also use N for ambiguous (e.g. 3,5,6,...)
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_ => PileBase::N,
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}
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}
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