fn read<R: LengthRead>(reader: &mut R, params: P) -> Result<Self, DecodeError>;
}
+/// A trait that various higher-level rust-lightning types implement allowing them to be read in
+/// from a Read, requiring the implementer to provide the total length of the read.
+pub(crate) trait LengthReadable where Self: Sized
+{
+ /// Reads a Self in from the given LengthRead
+ fn read<R: LengthRead>(reader: &mut R) -> Result<Self, DecodeError>;
+}
+
/// A trait that various rust-lightning types implement allowing them to (maybe) be read in from a Read
///
/// (C-not exported) as we only export serialization to/from byte arrays instead
Ok(Self(Some(Readable::read(reader)?)))
}
}
+/// When handling default_values, we want to map the default-value T directly
+/// to a OptionDeserWrapper<T> in a way that works for `field: T = t;` as
+/// well. Thus, we assume `Into<T> for T` does nothing and use that.
+impl<T: Readable> From<T> for OptionDeserWrapper<T> {
+ fn from(t: T) -> OptionDeserWrapper<T> { OptionDeserWrapper(Some(t)) }
+}
/// Wrapper to write each element of a Vec with no length prefix
pub(crate) struct VecWriteWrapper<'a, T: Writeable>(pub &'a Vec<T>);
/// variable-length integer which is simply truncated by skipping high zero bytes. This type
/// encapsulates such integers implementing Readable/Writeable for them.
#[cfg_attr(test, derive(PartialEq, Debug))]
-pub(crate) struct HighZeroBytesDroppedVarInt<T>(pub T);
+pub(crate) struct HighZeroBytesDroppedBigSize<T>(pub T);
macro_rules! impl_writeable_primitive {
($val_type:ty, $len: expr) => {
writer.write_all(&self.to_be_bytes())
}
}
- impl Writeable for HighZeroBytesDroppedVarInt<$val_type> {
+ impl Writeable for HighZeroBytesDroppedBigSize<$val_type> {
#[inline]
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
// Skip any full leading 0 bytes when writing (in BE):
Ok(<$val_type>::from_be_bytes(buf))
}
}
- impl Readable for HighZeroBytesDroppedVarInt<$val_type> {
+ impl Readable for HighZeroBytesDroppedBigSize<$val_type> {
#[inline]
- fn read<R: Read>(reader: &mut R) -> Result<HighZeroBytesDroppedVarInt<$val_type>, DecodeError> {
+ fn read<R: Read>(reader: &mut R) -> Result<HighZeroBytesDroppedBigSize<$val_type>, DecodeError> {
// We need to accept short reads (read_len == 0) as "EOF" and handle them as simply
// the high bytes being dropped. To do so, we start reading into the middle of buf
// and then convert the appropriate number of bytes with extra high bytes out of
let first_byte = $len - ($len - total_read_len);
let mut bytes = [0; $len];
bytes.copy_from_slice(&buf[first_byte..first_byte + $len]);
- Ok(HighZeroBytesDroppedVarInt(<$val_type>::from_be_bytes(bytes)))
+ Ok(HighZeroBytesDroppedBigSize(<$val_type>::from_be_bytes(bytes)))
} else {
// If the encoding had extra zero bytes, return a failure even though we know
// what they meant (as the TLV test vectors require this)
($bitcoin_type: ty) => {
impl Writeable for $bitcoin_type {
fn write<W: Writer>(&self, writer: &mut W) -> Result<(), io::Error> {
- match self.consensus_encode(WriterWriteAdaptor(writer)) {
+ match self.consensus_encode(&mut WriterWriteAdaptor(writer)) {
Ok(_) => Ok(()),
Err(e) => Err(e),
}