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// -*- coding: utf-8 -*-
//
// disktest - Storage tester
//
// Copyright 2020-2024 Michael Büsch <m@bues.ch>
//
// Licensed under the Apache License version 2.0
// or the MIT license, at your option.
// SPDX-License-Identifier: Apache-2.0 OR MIT
//
mod chacha;
mod crc;
use crate::util::prettybytes;
use anyhow as ah;
pub use crate::generator::chacha::GeneratorChaCha12;
pub use crate::generator::chacha::GeneratorChaCha20;
pub use crate::generator::chacha::GeneratorChaCha8;
pub use crate::generator::crc::GeneratorCrc;
pub trait NextRandom {
/// Get the size of the next() output with count = 1, in bytes.
fn get_base_size(&self) -> usize;
/// Generate the next chunks.
/// buf: Buffer to hold all chunks.
/// count: The number of chunks to return.
/// Returns all chunks concatenated in a Vec.
fn next(&mut self, buf: &mut [u8], count: usize);
/// Seek the algorithm to the specified offset.
fn seek(&mut self, byte_offset: u64) -> ah::Result<()> {
if byte_offset == 0 {
Ok(())
} else {
Err(ah::format_err!(
"The selected random number generator \
does not support seeking to byte offset {}.",
prettybytes(byte_offset, true, true, true)
))
}
}
}
// vim: ts=4 sw=4 expandtab
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