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use ahash::AHasher;
use core::hash::Hasher;
use alloc::{borrow::ToOwned, rc::Rc, string::String, vec::Vec};
use core::{cell::RefCell, convert::From};
use serde::{Deserialize, Serialize};
#[cfg(feature = "std")]
use std::{
fs::File,
io::{Read, Write},
path::Path,
};
#[cfg(feature = "std")]
use crate::Error;
use crate::{
bolts::ownedref::OwnedSlice,
inputs::{HasBytesVec, HasLen, HasTargetBytes, Input},
};
#[derive(Serialize, Deserialize, Clone, Debug, Default, PartialEq, Eq)]
pub struct BytesInput {
bytes: Vec<u8>,
}
impl Input for BytesInput {
#[cfg(feature = "std")]
fn to_file<P>(&self, path: P) -> Result<(), Error>
where
P: AsRef<Path>,
{
let mut file = File::create(path)?;
file.write_all(&self.bytes)?;
Ok(())
}
#[cfg(feature = "std")]
fn from_file<P>(path: P) -> Result<Self, Error>
where
P: AsRef<Path>,
{
let mut file = File::open(path)?;
let mut bytes: Vec<u8> = vec![];
file.read_to_end(&mut bytes)?;
Ok(BytesInput::new(bytes))
}
fn generate_name(&self, _idx: usize) -> String {
let mut hasher = AHasher::new_with_keys(0, 0);
hasher.write(self.bytes());
format!("{:016x}", hasher.finish())
}
}
impl From<BytesInput> for Rc<RefCell<BytesInput>> {
fn from(input: BytesInput) -> Self {
Rc::new(RefCell::new(input))
}
}
impl HasBytesVec for BytesInput {
#[inline]
fn bytes(&self) -> &[u8] {
&self.bytes
}
#[inline]
fn bytes_mut(&mut self) -> &mut Vec<u8> {
&mut self.bytes
}
}
impl HasTargetBytes for BytesInput {
#[inline]
fn target_bytes(&self) -> OwnedSlice<u8> {
OwnedSlice::Ref(&self.bytes)
}
}
impl HasLen for BytesInput {
#[inline]
fn len(&self) -> usize {
self.bytes.len()
}
}
impl From<Vec<u8>> for BytesInput {
fn from(bytes: Vec<u8>) -> Self {
Self::new(bytes)
}
}
impl From<&[u8]> for BytesInput {
fn from(bytes: &[u8]) -> Self {
Self::new(bytes.to_owned())
}
}
impl BytesInput {
#[must_use]
pub fn new(bytes: Vec<u8>) -> Self {
Self { bytes }
}
}
#[cfg(test)]
mod tests {
use crate::bolts::rands::{Rand, StdRand};
#[test]
fn test_input() {
let mut rand = StdRand::with_seed(0);
assert_ne!(rand.next(), rand.next());
assert!(rand.below(100) < 100);
assert_eq!(rand.below(1), 0);
assert_eq!(rand.between(10, 10), 10);
assert!(rand.between(11, 20) > 10);
}
}