1// Copyright 2015 The Go Authors. All rights reserved.
 2// Use of this source code is governed by a BSD-style
 3// license that can be found in the LICENSE file.
 4
 5//go:build (!amd64 || appengine) && (!386 || appengine) && (!ppc64le || appengine)
 6// +build !amd64 appengine
 7// +build !386 appengine
 8// +build !ppc64le appengine
 9
10package sha3
11
12import "encoding/binary"
13
14// xorIn xors the bytes in buf into the state; it
15// makes no non-portable assumptions about memory layout
16// or alignment.
17func xorIn(d *State, buf []byte) {
18	n := len(buf) / 8
19
20	for i := 0; i < n; i++ {
21		a := binary.LittleEndian.Uint64(buf)
22		d.a[i] ^= a
23		buf = buf[8:]
24	}
25}
26
27// copyOut copies ulint64s to a byte buffer.
28func copyOut(d *State, b []byte) {
29	for i := 0; len(b) >= 8; i++ {
30		binary.LittleEndian.PutUint64(b, d.a[i])
31		b = b[8:]
32	}
33}