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use std::io::{Cursor, Read, Write};
use byteorder::{LittleEndian, WriteBytesExt, ReadBytesExt};
use serialize::hex::ToHex;
use network::encodable::{ConsensusDecodable, ConsensusEncodable};
use util::hash::Sha256dHash;
use util;
pub trait BitcoinHash {
fn bitcoin_hash(&self) -> Sha256dHash;
}
impl BitcoinHash for Vec<u8> {
#[inline]
fn bitcoin_hash(&self) -> Sha256dHash {
Sha256dHash::from_data(&self[..])
}
}
pub fn serialize<T: ?Sized>(data: &T) -> Result<Vec<u8>, util::Error>
where T: ConsensusEncodable<RawEncoder<Cursor<Vec<u8>>>>,
{
let mut encoder = RawEncoder::new(Cursor::new(vec![]));
try!(data.consensus_encode(&mut encoder));
Ok(encoder.into_inner().into_inner())
}
pub fn serialize_hex<T: ?Sized>(data: &T) -> Result<String, util::Error>
where T: ConsensusEncodable<RawEncoder<Cursor<Vec<u8>>>>
{
let serial = try!(serialize(data));
Ok(serial.to_hex())
}
pub fn deserialize<'a, T>(data: &'a [u8]) -> Result<T, util::Error>
where T: ConsensusDecodable<RawDecoder<Cursor<&'a [u8]>>>
{
let mut decoder = RawDecoder::new(Cursor::new(data));
ConsensusDecodable::consensus_decode(&mut decoder)
}
pub struct RawEncoder<W> {
writer: W
}
pub struct RawDecoder<R> {
reader: R
}
impl<W: Write> RawEncoder<W> {
pub fn new(writer: W) -> RawEncoder<W> { RawEncoder { writer: writer } }
pub fn into_inner(self) -> W { self.writer }
}
impl<R: Read> RawDecoder<R> {
pub fn new(reader: R) -> RawDecoder<R> { RawDecoder { reader: reader } }
pub fn into_inner(self) -> R { self.reader }
}
pub trait SimpleEncoder {
type Error;
fn emit_u64(&mut self, v: u64) -> Result<(), Self::Error>;
fn emit_u32(&mut self, v: u32) -> Result<(), Self::Error>;
fn emit_u16(&mut self, v: u16) -> Result<(), Self::Error>;
fn emit_u8(&mut self, v: u8) -> Result<(), Self::Error>;
fn emit_i64(&mut self, v: i64) -> Result<(), Self::Error>;
fn emit_i32(&mut self, v: i32) -> Result<(), Self::Error>;
fn emit_i16(&mut self, v: i16) -> Result<(), Self::Error>;
fn emit_i8(&mut self, v: i8) -> Result<(), Self::Error>;
fn emit_bool(&mut self, v: bool) -> Result<(), Self::Error>;
}
pub trait SimpleDecoder {
type Error;
fn read_u64(&mut self) -> Result<u64, Self::Error>;
fn read_u32(&mut self) -> Result<u32, Self::Error>;
fn read_u16(&mut self) -> Result<u16, Self::Error>;
fn read_u8(&mut self) -> Result<u8, Self::Error>;
fn read_i64(&mut self) -> Result<i64, Self::Error>;
fn read_i32(&mut self) -> Result<i32, Self::Error>;
fn read_i16(&mut self) -> Result<i16, Self::Error>;
fn read_i8(&mut self) -> Result<i8, Self::Error>;
fn read_bool(&mut self) -> Result<bool, Self::Error>;
fn error(&mut self, err: String) -> Self::Error;
}
macro_rules! encoder_fn {
($name:ident, $val_type:ty, $writefn:ident) => {
#[inline]
fn $name(&mut self, v: $val_type) -> Result<(), util::Error> {
self.writer.$writefn::<LittleEndian>(v).map_err(util::Error::ByteOrder)
}
}
}
macro_rules! decoder_fn {
($name:ident, $val_type:ty, $readfn:ident) => {
#[inline]
fn $name(&mut self) -> Result<$val_type, util::Error> {
self.reader.$readfn::<LittleEndian>().map_err(util::Error::ByteOrder)
}
}
}
impl<W: Write> SimpleEncoder for RawEncoder<W> {
type Error = util::Error;
encoder_fn!(emit_u64, u64, write_u64);
encoder_fn!(emit_u32, u32, write_u32);
encoder_fn!(emit_u16, u16, write_u16);
encoder_fn!(emit_i64, i64, write_i64);
encoder_fn!(emit_i32, i32, write_i32);
encoder_fn!(emit_i16, i16, write_i16);
#[inline]
fn emit_i8(&mut self, v: i8) -> Result<(), util::Error> {
self.writer.write_i8(v).map_err(util::Error::ByteOrder)
}
#[inline]
fn emit_u8(&mut self, v: u8) -> Result<(), util::Error> {
self.writer.write_u8(v).map_err(util::Error::ByteOrder)
}
#[inline]
fn emit_bool(&mut self, v: bool) -> Result<(), util::Error> {
self.writer.write_i8(if v {1} else {0}).map_err(util::Error::ByteOrder)
}
}
impl<R: Read> SimpleDecoder for RawDecoder<R> {
type Error = util::Error;
decoder_fn!(read_u64, u64, read_u64);
decoder_fn!(read_u32, u32, read_u32);
decoder_fn!(read_u16, u16, read_u16);
decoder_fn!(read_i64, i64, read_i64);
decoder_fn!(read_i32, i32, read_i32);
decoder_fn!(read_i16, i16, read_i16);
#[inline]
fn read_u8(&mut self) -> Result<u8, util::Error> {
self.reader.read_u8().map_err(util::Error::ByteOrder)
}
#[inline]
fn read_i8(&mut self) -> Result<i8, util::Error> {
self.reader.read_i8().map_err(util::Error::ByteOrder)
}
#[inline]
fn read_bool(&mut self) -> Result<bool, util::Error> {
match self.reader.read_i8() {
Ok(bit) => Ok(bit != 0),
Err(e) => Err(util::Error::ByteOrder(e))
}
}
#[inline]
fn error(&mut self, err: String) -> util::Error {
util::Error::Detail(err, Box::new(util::Error::ParseFailed))
}
}