//! I/O adapters for cryptographic digests.
//!
//! This module provides [`DigestReader`] and [`DigestWriter`] which wrap
//! [`std::io::Read`] and [`std::io::Write`] implementations to compute digests
//! transparently during I/O operations.
//!
//! # Performance
//!
//! - Zero-cost abstraction: All methods are `#[inline]`
//! - Vectored I/O support: Uses the `update_vectored` method when available
//! - Correctness: Only hashes bytes actually transferred (handles short reads/writes)
//!
//! # Example
//!
//! ```rust
//! # #[cfg(feature = "sha2")]
//! # {
//! use std::io::{Cursor, Read};
//!
//! use rscrypto::{Digest as _, Sha256};
//!
//! let mut reader = Sha256::reader(Cursor::new(b"hello world".to_vec()));
//! let mut contents = Vec::new();
//! let bytes = reader.read_to_end(&mut contents).unwrap();
//! assert_eq!(bytes, b"hello world".len());
//! assert_eq!(contents, b"hello world");
//! assert_eq!(reader.digest(), Sha256::digest(&contents));
//! # }
//! ```
pub use crate;