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use std::io;
/// Extends [`Read`] with methods for writing Zcash/Bitcoin types.
///
/// [`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
pub trait ReadZcashExt: io::Read {
/// Convenience method to read a `[u8; 4]`.
#[inline]
fn read_4_bytes(&mut self) -> io::Result<[u8; 4]> {
let mut bytes = [0; 4];
self.read_exact(&mut bytes)?;
Ok(bytes)
}
/// Convenience method to read a `[u8; 12]`.
#[inline]
fn read_12_bytes(&mut self) -> io::Result<[u8; 12]> {
let mut bytes = [0; 12];
self.read_exact(&mut bytes)?;
Ok(bytes)
}
/// Convenience method to read a `[u8; 32]`.
#[inline]
fn read_32_bytes(&mut self) -> io::Result<[u8; 32]> {
let mut bytes = [0; 32];
self.read_exact(&mut bytes)?;
Ok(bytes)
}
/// Convenience method to read a `[u8; 64]`.
#[inline]
fn read_64_bytes(&mut self) -> io::Result<[u8; 64]> {
let mut bytes = [0; 64];
self.read_exact(&mut bytes)?;
Ok(bytes)
}
}
/// Mark all types implementing `Read` as implementing the extension.
impl<R: io::Read + ?Sized> ReadZcashExt for R {}