629 lines
18 KiB
Rust
629 lines
18 KiB
Rust
use std::fmt::Debug;
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use std::fmt;
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use std::error;
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use test::Bencher;
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use rustc_serialize::{Decoder, Decodable};
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use serde;
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use serde::de::{Deserializer, Deserialize};
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//////////////////////////////////////////////////////////////////////////////
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#[derive(PartialEq, Debug)]
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pub enum Error {
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EndOfStream,
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Syntax,
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}
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impl serde::de::Error for Error {
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fn custom<T: Into<String>>(_: T) -> Error { Error::Syntax }
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fn end_of_stream() -> Error { Error::EndOfStream }
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fn unknown_field(_: &str) -> Error { Error::Syntax }
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fn missing_field(_: &'static str) -> Error { Error::Syntax }
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}
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impl fmt::Display for Error {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> Result<(), fmt::Error> {
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formatter.write_str(format!("{:?}", self).as_ref())
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}
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}
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impl error::Error for Error {
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fn description(&self) -> &str {
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"Serde Deserialization Error"
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}
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fn cause(&self) -> Option<&error::Error> {
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None
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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mod decoder {
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use std::vec;
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use rustc_serialize;
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use super::Error;
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pub struct UsizeDecoder {
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len: usize,
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iter: vec::IntoIter<usize>,
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}
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impl UsizeDecoder {
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#[inline]
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pub fn new(values: Vec<usize>) -> UsizeDecoder {
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UsizeDecoder {
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len: values.len(),
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iter: values.into_iter(),
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}
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}
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}
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impl rustc_serialize::Decoder for UsizeDecoder {
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type Error = Error;
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fn error(&mut self, _: &str) -> Error { Error::Syntax }
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// Primitive types:
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fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
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#[inline]
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fn read_usize(&mut self) -> Result<usize, Error> {
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match self.iter.next() {
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Some(value) => Ok(value),
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None => Err(Error::EndOfStream),
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}
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}
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fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
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fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
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fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
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fn read_u8(&mut self) -> Result<u8, Error> { Err(Error::Syntax) }
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fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::Syntax) }
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fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
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fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
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fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
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fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
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fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
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fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
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fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
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fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
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fn read_str(&mut self) -> Result<String, Error> { Err(Error::Syntax) }
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// Compound types:
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fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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// Specialized types:
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fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder, bool) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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#[inline]
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fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
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{
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let len = self.len;
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f(self, len)
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}
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#[inline]
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fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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f(self)
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}
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fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut UsizeDecoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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}
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pub struct U8Decoder {
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len: usize,
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iter: vec::IntoIter<u8>,
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}
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impl U8Decoder {
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#[inline]
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pub fn new(values: Vec<u8>) -> U8Decoder {
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U8Decoder {
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len: values.len(),
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iter: values.into_iter(),
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}
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}
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}
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impl rustc_serialize::Decoder for U8Decoder {
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type Error = Error;
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fn error(&mut self, _: &str) -> Error { Error::Syntax }
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// Primitive types:
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fn read_nil(&mut self) -> Result<(), Error> { Err(Error::Syntax) }
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fn read_usize(&mut self) -> Result<usize, Error> { Err(Error::Syntax) }
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fn read_u64(&mut self) -> Result<u64, Error> { Err(Error::Syntax) }
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fn read_u32(&mut self) -> Result<u32, Error> { Err(Error::Syntax) }
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fn read_u16(&mut self) -> Result<u16, Error> { Err(Error::Syntax) }
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#[inline]
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fn read_u8(&mut self) -> Result<u8, Error> {
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match self.iter.next() {
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Some(value) => Ok(value),
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None => Err(Error::EndOfStream),
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}
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}
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#[inline]
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fn read_isize(&mut self) -> Result<isize, Error> { Err(Error::Syntax) }
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fn read_i64(&mut self) -> Result<i64, Error> { Err(Error::Syntax) }
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fn read_i32(&mut self) -> Result<i32, Error> { Err(Error::Syntax) }
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fn read_i16(&mut self) -> Result<i16, Error> { Err(Error::Syntax) }
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fn read_i8(&mut self) -> Result<i8, Error> { Err(Error::Syntax) }
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fn read_bool(&mut self) -> Result<bool, Error> { Err(Error::Syntax) }
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fn read_f64(&mut self) -> Result<f64, Error> { Err(Error::Syntax) }
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fn read_f32(&mut self) -> Result<f32, Error> { Err(Error::Syntax) }
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fn read_char(&mut self) -> Result<char, Error> { Err(Error::Syntax) }
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fn read_str(&mut self) -> Result<String, Error> { Err(Error::Syntax) }
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// Compound types:
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fn read_enum<T, F>(&mut self, _name: &str, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_variant_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_struct_variant<T, F>(&mut self, _names: &[&str], _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_enum_struct_variant_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_struct_field<T, F>(&mut self, _f_name: &str, _f_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple<T, F>(&mut self, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_struct<T, F>(&mut self, _s_name: &str, _len: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_tuple_struct_arg<T, F>(&mut self, _a_idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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// Specialized types:
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fn read_option<T, F>(&mut self, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder, bool) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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#[inline]
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fn read_seq<T, F>(&mut self, f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
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{
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let len = self.len;
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f(self, len)
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}
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#[inline]
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fn read_seq_elt<T, F>(&mut self, _idx: usize, f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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f(self)
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}
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fn read_map<T, F>(&mut self, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder, usize) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_map_elt_key<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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fn read_map_elt_val<T, F>(&mut self, _idx: usize, _f: F) -> Result<T, Error> where
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F: FnOnce(&mut U8Decoder) -> Result<T, Error>,
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{
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Err(Error::Syntax)
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}
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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mod deserializer {
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//use std::num;
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use std::vec;
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use super::Error;
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use serde::de;
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#[derive(PartialEq, Debug)]
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enum State {
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Start,
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SepOrEnd,
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End,
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}
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pub struct Deserializer<A> {
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state: State,
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iter: vec::IntoIter<A>,
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len: usize,
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value: Option<A>,
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}
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impl<A> Deserializer<A> {
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#[inline]
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pub fn new(values: Vec<A>) -> Deserializer<A> {
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let len = values.len();
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Deserializer {
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state: State::Start,
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iter: values.into_iter(),
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len: len,
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value: None,
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}
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}
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}
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impl de::Deserializer for Deserializer<usize> {
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type Error = Error;
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#[inline]
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fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
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where V: de::Visitor,
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{
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match self.state {
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State::Start => {
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self.state = State::SepOrEnd;
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visitor.visit_seq(self)
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}
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State::SepOrEnd => {
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visitor.visit_usize(self.value.take().unwrap())
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}
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State::End => {
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Err(Error::EndOfStream)
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}
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}
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}
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}
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impl de::SeqVisitor for Deserializer<usize> {
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type Error = Error;
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#[inline]
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fn visit<T>(&mut self) -> Result<Option<T>, Error>
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where T: de::Deserialize,
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{
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match self.iter.next() {
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Some(value) => {
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self.len -= 1;
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self.value = Some(value);
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Ok(Some(try!(de::Deserialize::deserialize(self))))
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}
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None => {
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self.state = State::End;
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Ok(None)
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}
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}
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}
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|
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#[inline]
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fn end(&mut self) -> Result<(), Error> {
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match self.iter.next() {
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Some(_) => Err(Error::Syntax),
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None => {
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self.state = State::End;
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Ok(())
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}
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}
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}
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|
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#[inline]
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fn size_hint(&self) -> (usize, Option<usize>) {
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(self.len, Some(self.len))
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}
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}
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|
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impl de::Deserializer for Deserializer<u8> {
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type Error = Error;
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#[inline]
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fn deserialize<V>(&mut self, mut visitor: V) -> Result<V::Value, Error>
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|
where V: de::Visitor,
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{
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match self.state {
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State::Start => {
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self.state = State::SepOrEnd;
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visitor.visit_seq(self)
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}
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State::SepOrEnd => {
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visitor.visit_u8(self.value.take().unwrap())
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}
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State::End => {
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Err(Error::EndOfStream)
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}
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}
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}
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}
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|
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impl de::SeqVisitor for Deserializer<u8> {
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type Error = Error;
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#[inline]
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fn visit<T>(&mut self) -> Result<Option<T>, Error>
|
|
where T: de::Deserialize,
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|
{
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|
match self.iter.next() {
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Some(value) => {
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self.len -= 1;
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self.value = Some(value);
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Ok(Some(try!(de::Deserialize::deserialize(self))))
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}
|
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None => {
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self.state = State::End;
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Ok(None)
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}
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}
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}
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|
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#[inline]
|
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fn end(&mut self) -> Result<(), Error> {
|
|
match self.iter.next() {
|
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Some(_) => Err(Error::Syntax),
|
|
None => {
|
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self.state = State::End;
|
|
Ok(())
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}
|
|
}
|
|
}
|
|
|
|
#[inline]
|
|
fn size_hint(&self) -> (usize, Option<usize>) {
|
|
(self.len, Some(self.len))
|
|
}
|
|
}
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
fn run_decoder<
|
|
D: Decoder<Error=Error>,
|
|
T: Clone + PartialEq + Debug + Decodable
|
|
>(mut d: D, value: T) {
|
|
let v = Decodable::decode(&mut d);
|
|
|
|
assert_eq!(Ok(value), v);
|
|
}
|
|
|
|
fn run_deserializer<D, T>(mut d: D, value: T)
|
|
where D: Deserializer,
|
|
D::Error: Debug + PartialEq,
|
|
T: Clone + PartialEq + Debug + Deserialize
|
|
{
|
|
let v = T::deserialize(&mut d);
|
|
|
|
assert_eq!(Ok(value), v);
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_usize_000(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = vec!();
|
|
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_usize_003(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = vec!(1, 2, 3);
|
|
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_usize_100(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = (0 .. 100).collect();
|
|
run_decoder(decoder::UsizeDecoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_u8_000(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = vec!();
|
|
run_decoder(decoder::U8Decoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_u8_003(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = vec!(1, 2, 3);
|
|
run_decoder(decoder::U8Decoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_decoder_u8_100(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = (0 .. 100).collect();
|
|
run_decoder(decoder::U8Decoder::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_usize_000(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = vec!();
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_usize_003(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = vec!(1, 2, 3);
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_usize_100(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<usize> = (0 .. 100).collect();
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_u8_000(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = vec!();
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_u8_003(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = vec!(1, 2, 3);
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|
|
|
|
#[bench]
|
|
fn bench_deserializer_u8_100(b: &mut Bencher) {
|
|
b.iter(|| {
|
|
let v: Vec<u8> = (0 .. 100).collect();
|
|
run_deserializer(deserializer::Deserializer::new(v.clone()), v)
|
|
})
|
|
}
|