diff --git a/src/rlp/rlpin.rs b/src/rlp/rlpin.rs index 2179643d1..4cc83b261 100644 --- a/src/rlp/rlpin.rs +++ b/src/rlp/rlpin.rs @@ -1,3 +1,4 @@ +use std::fmt; use rlp::{View, Decodable, DecoderError, UntrustedRlp, PayloadInfo, Prototype}; impl<'a> From> for Rlp<'a> { @@ -15,6 +16,12 @@ pub struct Rlp<'a> { rlp: UntrustedRlp<'a> } +impl<'a> fmt::Display for Rlp<'a> { + fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { + write!(f, "{}", self.rlp) + } +} + impl<'a, 'view> View<'a, 'view> for Rlp<'a> where 'a: 'view { type Prototype = Prototype; type PayloadInfo = PayloadInfo; diff --git a/src/rlp/untrusted_rlp.rs b/src/rlp/untrusted_rlp.rs index c0e7c4cf7..a5ee7990e 100644 --- a/src/rlp/untrusted_rlp.rs +++ b/src/rlp/untrusted_rlp.rs @@ -1,4 +1,6 @@ use std::cell::Cell; +use std::fmt; +use rustc_serialize::hex::ToHex; use bytes::{FromBytes}; use rlp::{View, Decoder, Decodable, DecoderError}; @@ -63,6 +65,24 @@ impl<'a> Clone for UntrustedRlp<'a> { } } +impl<'a> fmt::Display for UntrustedRlp<'a> { + fn fmt(&self, f: &mut fmt::Formatter) -> Result<(), fmt::Error> { + match self.prototype() { + Ok(Prototype::Null) => write!(f, "null"), + Ok(Prototype::Data(_)) => write!(f, "\"0x{}\"", self.data().unwrap().to_hex()), + Ok(Prototype::List(len)) => { + try!(write!(f, "[")); + for i in 0..len-1 { + try!(write!(f, "{}, ", self.at(i).unwrap())); + } + try!(write!(f, "{}", self.at(len - 1).unwrap())); + write!(f, "]") + }, + Err(err) => write!(f, "{:?}", err) + } + } +} + impl<'a, 'view> View<'a, 'view> for UntrustedRlp<'a> where 'a: 'view { type Prototype = Result; type PayloadInfo = Result; @@ -410,3 +430,12 @@ impl_array_decodable_recursive!( 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 40, 48, 56, 64, 72, 96, 128, 160, 192, 224, ); + +#[test] +fn test_rlp_display() { + use rustc_serialize::hex::FromHex; + let data = "f84d0589010efbef67941f79b2a056e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421a0c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470".from_hex().unwrap(); + let rlp = UntrustedRlp::new(&data); + println!("{}", rlp); +} +