Additional bloom-related functionality.

RlpStandard for non-emit_*-based RlpStream extesions.

src/rlp/mod.rs

@@ -43,7 +43,7 @@ pub use self::rlperrors::DecoderError;
 pub use self::rlptraits::{Decoder, Decodable, View, Stream, Encodable, Encoder};
 pub use self::untrusted_rlp::{UntrustedRlp, UntrustedRlpIterator, PayloadInfo, Prototype};
 pub use self::rlpin::{Rlp, RlpIterator};
-pub use self::rlpstream::{RlpStream};
+pub use self::rlpstream::{RlpStream,RlpStandard};
 use super::hash::H256;
 
 pub const NULL_RLP: [u8; 1] = [0x80; 1];

src/rlp/rlpstream.rs

@@ -1,6 +1,8 @@
 use elastic_array::*;
-use bytes::ToBytes;
+use bytes::{Bytes, ToBytes};
 use rlp::{Stream, Encoder, Encodable};
+use hash::H256;
+use sha3::*;
 
 #[derive(Debug, Copy, Clone)]
 struct ListInfo {
@@ -213,6 +215,20 @@ impl Encoder for BasicEncoder {
 	}
 }
 
+pub trait RlpStandard {
+	fn rlp_append(&self, s: &mut RlpStream);
+
+	fn rlp_bytes(&self) -> Bytes {
+		let mut s = RlpStream::new();
+		self.rlp_append(&mut s);
+		s.out()
+	}
+
+	fn rlp_sha3(&self) -> H256 { self.rlp_bytes().sha3() }
+}
+
+// @debris TODO: implement Encoder for RlpStandard.
+
 impl<T> Encodable for T where T: ToBytes {
 	fn encode<E>(&self, encoder: &mut E) where E: Encoder {
 		encoder.emit_value(&self.to_bytes())