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use crate::{Block, BlockSizeUser, Sha1Core};
use digest::typenum::Unsigned;
cfg_if::cfg_if! {
if #[cfg(feature = "force-soft")] {
mod soft;
use soft::compress as compress_inner;
} else if #[cfg(all(feature = "asm", target_arch = "aarch64"))] {
mod soft;
mod aarch64;
use aarch64::compress as compress_inner;
} else if #[cfg(any(target_arch = "x86", target_arch = "x86_64"))] {
#[cfg(not(feature = "asm"))]
mod soft;
#[cfg(feature = "asm")]
mod soft {
pub use sha1_asm::compress;
}
mod x86;
use x86::compress as compress_inner;
} else {
mod soft;
use soft::compress as compress_inner;
}
}
const BLOCK_SIZE: usize = <Sha1Core as BlockSizeUser>::BlockSize::USIZE;
/// SHA-1 compression function
#[cfg_attr(docsrs, doc(cfg(feature = "compress")))]
pub fn compress(state: &mut [u32; 5], blocks: &[Block<Sha1Core>]) {
// SAFETY: GenericArray<u8, U64> and [u8; 64] have
// exactly the same memory layout
let blocks: &[[u8; BLOCK_SIZE]] =
unsafe { &*(blocks as *const _ as *const [[u8; BLOCK_SIZE]]) };
compress_inner(state, blocks);
}