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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// VecMap
#![allow(deprecated)]
//! Implementations of serialization for structures found in libcollections
use std::usize;
use std::default::Default;
use std::hash::Hash;
use std::collections::hash_state::HashState;
use {Decodable, Encodable, Decoder, Encoder};
use std::collections::{LinkedList, VecDeque, BTreeMap, BTreeSet, HashMap, HashSet, VecMap};
use collections::enum_set::{EnumSet, CLike};
impl<
T: Encodable
> Encodable for LinkedList<T> {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_seq(self.len(), |s| {
for (i, e) in self.iter().enumerate() {
try!(s.emit_seq_elt(i, |s| e.encode(s)));
}
Ok(())
})
}
}
impl<T:Decodable> Decodable for LinkedList<T> {
fn decode<D: Decoder>(d: &mut D) -> Result<LinkedList<T>, D::Error> {
d.read_seq(|d, len| {
let mut list = LinkedList::new();
for i in 0..len {
list.push_back(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
}
Ok(list)
})
}
}
impl<T: Encodable> Encodable for VecDeque<T> {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_seq(self.len(), |s| {
for (i, e) in self.iter().enumerate() {
try!(s.emit_seq_elt(i, |s| e.encode(s)));
}
Ok(())
})
}
}
impl<T:Decodable> Decodable for VecDeque<T> {
fn decode<D: Decoder>(d: &mut D) -> Result<VecDeque<T>, D::Error> {
d.read_seq(|d, len| {
let mut deque: VecDeque<T> = VecDeque::new();
for i in 0..len {
deque.push_back(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
}
Ok(deque)
})
}
}
impl<
K: Encodable + PartialEq + Ord,
V: Encodable + PartialEq
> Encodable for BTreeMap<K, V> {
fn encode<S: Encoder>(&self, e: &mut S) -> Result<(), S::Error> {
e.emit_map(self.len(), |e| {
let mut i = 0;
for (key, val) in self {
try!(e.emit_map_elt_key(i, |e| key.encode(e)));
try!(e.emit_map_elt_val(i, |e| val.encode(e)));
i += 1;
}
Ok(())
})
}
}
impl<
K: Decodable + PartialEq + Ord,
V: Decodable + PartialEq
> Decodable for BTreeMap<K, V> {
fn decode<D: Decoder>(d: &mut D) -> Result<BTreeMap<K, V>, D::Error> {
d.read_map(|d, len| {
let mut map = BTreeMap::new();
for i in 0..len {
let key = try!(d.read_map_elt_key(i, |d| Decodable::decode(d)));
let val = try!(d.read_map_elt_val(i, |d| Decodable::decode(d)));
map.insert(key, val);
}
Ok(map)
})
}
}
impl<
T: Encodable + PartialEq + Ord
> Encodable for BTreeSet<T> {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
s.emit_seq(self.len(), |s| {
let mut i = 0;
for e in self {
try!(s.emit_seq_elt(i, |s| e.encode(s)));
i += 1;
}
Ok(())
})
}
}
impl<
T: Decodable + PartialEq + Ord
> Decodable for BTreeSet<T> {
fn decode<D: Decoder>(d: &mut D) -> Result<BTreeSet<T>, D::Error> {
d.read_seq(|d, len| {
let mut set = BTreeSet::new();
for i in 0..len {
set.insert(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
}
Ok(set)
})
}
}
impl<
T: Encodable + CLike
> Encodable for EnumSet<T> {
fn encode<S: Encoder>(&self, s: &mut S) -> Result<(), S::Error> {
let mut bits = 0;
for item in self {
bits |= item.to_usize();
}
s.emit_uint(bits)
}
}
impl<
T: Decodable + CLike
> Decodable for EnumSet<T> {
fn decode<D: Decoder>(d: &mut D) -> Result<EnumSet<T>, D::Error> {
let bits = try!(d.read_uint());
let mut set = EnumSet::new();
for bit in 0..usize::BITS {
if bits & (1 << bit) != 0 {
set.insert(CLike::from_usize(1 << bit));
}
}
Ok(set)
}
}
impl<K, V, S> Encodable for HashMap<K, V, S>
where K: Encodable + Hash + Eq,
V: Encodable,
S: HashState,
{
fn encode<E: Encoder>(&self, e: &mut E) -> Result<(), E::Error> {
e.emit_map(self.len(), |e| {
let mut i = 0;
for (key, val) in self {
try!(e.emit_map_elt_key(i, |e| key.encode(e)));
try!(e.emit_map_elt_val(i, |e| val.encode(e)));
i += 1;
}
Ok(())
})
}
}
impl<K, V, S> Decodable for HashMap<K, V, S>
where K: Decodable + Hash + Eq,
V: Decodable,
S: HashState + Default,
{
fn decode<D: Decoder>(d: &mut D) -> Result<HashMap<K, V, S>, D::Error> {
d.read_map(|d, len| {
let state = Default::default();
let mut map = HashMap::with_capacity_and_hash_state(len, state);
for i in 0..len {
let key = try!(d.read_map_elt_key(i, |d| Decodable::decode(d)));
let val = try!(d.read_map_elt_val(i, |d| Decodable::decode(d)));
map.insert(key, val);
}
Ok(map)
})
}
}
impl<T, S> Encodable for HashSet<T, S>
where T: Encodable + Hash + Eq,
S: HashState,
{
fn encode<E: Encoder>(&self, s: &mut E) -> Result<(), E::Error> {
s.emit_seq(self.len(), |s| {
let mut i = 0;
for e in self {
try!(s.emit_seq_elt(i, |s| e.encode(s)));
i += 1;
}
Ok(())
})
}
}
impl<T, S> Decodable for HashSet<T, S>
where T: Decodable + Hash + Eq,
S: HashState + Default,
{
fn decode<D: Decoder>(d: &mut D) -> Result<HashSet<T, S>, D::Error> {
d.read_seq(|d, len| {
let state = Default::default();
let mut set = HashSet::with_capacity_and_hash_state(len, state);
for i in 0..len {
set.insert(try!(d.read_seq_elt(i, |d| Decodable::decode(d))));
}
Ok(set)
})
}
}
impl<V: Encodable> Encodable for VecMap<V> {
fn encode<S: Encoder>(&self, e: &mut S) -> Result<(), S::Error> {
e.emit_map(self.len(), |e| {
for (i, (key, val)) in self.iter().enumerate() {
try!(e.emit_map_elt_key(i, |e| key.encode(e)));
try!(e.emit_map_elt_val(i, |e| val.encode(e)));
}
Ok(())
})
}
}
impl<V: Decodable> Decodable for VecMap<V> {
fn decode<D: Decoder>(d: &mut D) -> Result<VecMap<V>, D::Error> {
d.read_map(|d, len| {
let mut map = VecMap::new();
for i in 0..len {
let key = try!(d.read_map_elt_key(i, |d| Decodable::decode(d)));
let val = try!(d.read_map_elt_val(i, |d| Decodable::decode(d)));
map.insert(key, val);
}
Ok(map)
})
}
}
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