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rust-bitcoin-unsafe-fast
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Expose VarInt's encoded length

This commit is contained in:
Matt Corallo 2018-03-26 11:32:52 -04:00
parent 050fd8ccd0
commit f859dc8b26
1 changed files with 15 additions and 0 deletions
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15
src/network/encodable.rs
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@ -83,6 +83,21 @@ impl_int_encodable!(i16, read_i16, emit_i16);
impl_int_encodable!(i32, read_i32, emit_i32); impl_int_encodable!(i32, read_i32, emit_i32);
impl_int_encodable!(i64, read_i64, emit_i64); impl_int_encodable!(i64, read_i64, emit_i64);
impl VarInt {
/// Gets the length of this VarInt when encoded.
/// Returns 1 for 0...0xFC, 3 for 0xFD...(2^16-1), 5 for 0x10000...(2^32-1),
/// and 9 otherwise.
#[inline]
pub fn encoded_length(&self) -> u64 {
match self.0 {
0...0xFC => { 1 }
0xFD...0xFFFF => { 3 }
0x10000...0xFFFFFFFF => { 5 }
_ => { 9 }
}
}
}
impl<S: SimpleEncoder> ConsensusEncodable<S> for VarInt { impl<S: SimpleEncoder> ConsensusEncodable<S> for VarInt {
#[inline] #[inline]
fn consensus_encode(&self, s: &mut S) -> Result<(), S::Error> { fn consensus_encode(&self, s: &mut S) -> Result<(), S::Error> {