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Merge pull request #189 from LinearZoetrope/serde
Add Serde
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// Copyright 2017-2018 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// https://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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//! ISAAC serde helper functions. | ||
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pub(super) mod rand_size_serde { | ||
const RAND_SIZE_LEN: usize = 8; | ||
const RAND_SIZE: usize = 1 << RAND_SIZE_LEN; | ||
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use serde::{Deserialize, Deserializer, Serialize, Serializer}; | ||
use serde::de::{Visitor,SeqAccess}; | ||
use serde::de; | ||
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use std::fmt; | ||
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pub fn serialize<T, S>(arr: &[T;RAND_SIZE], ser: S) -> Result<S::Ok, S::Error> | ||
where | ||
T: Serialize, | ||
S: Serializer | ||
{ | ||
use serde::ser::SerializeTuple; | ||
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let mut seq = ser.serialize_tuple(RAND_SIZE)?; | ||
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for e in arr.iter() { | ||
seq.serialize_element(&e)?; | ||
} | ||
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seq.end() | ||
} | ||
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#[inline] | ||
pub fn deserialize<'de, T, D>(de: D) -> Result<[T;RAND_SIZE], D::Error> | ||
where | ||
T: Deserialize<'de>+Default+Copy, | ||
D: Deserializer<'de>, | ||
{ | ||
use std::marker::PhantomData; | ||
struct ArrayVisitor<T> { | ||
_pd: PhantomData<T>, | ||
}; | ||
impl<'de,T> Visitor<'de> for ArrayVisitor<T> | ||
where | ||
T: Deserialize<'de>+Default+Copy | ||
{ | ||
type Value = [T; RAND_SIZE]; | ||
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fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result { | ||
formatter.write_str("Isaac state array") | ||
} | ||
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#[inline] | ||
fn visit_seq<A>(self, mut seq: A) -> Result<[T; RAND_SIZE], A::Error> | ||
where | ||
A: SeqAccess<'de>, | ||
{ | ||
let mut out = [Default::default();RAND_SIZE]; | ||
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for i in 0..RAND_SIZE { | ||
match seq.next_element()? { | ||
Some(val) => out[i] = val, | ||
None => return Err(de::Error::invalid_length(i, &self)), | ||
}; | ||
} | ||
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Ok(out) | ||
} | ||
} | ||
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de.deserialize_tuple(RAND_SIZE, ArrayVisitor{_pd: PhantomData}) | ||
} | ||
} |
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