libgo/go/internal/bytealg/index_native.go

// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

//-go:build amd64 || arm64 || s390x || ppc64le || ppc64
// -build amd64 arm64 s390x ppc64le ppc64

package bytealg

//go:noescape

// Index returns the index of the first instance of b in a, or -1 if b is not present in a.
// Requires 2 <= len(b) <= MaxLen.
func Index(a, b []byte) int

//go:noescape

// IndexString returns the index of the first instance of b in a, or -1 if b is not present in a.
// Requires 2 <= len(b) <= MaxLen.
func IndexString(a, b string) int

func Cutover(n int) int {
	// 1 error per 8 characters, plus a few slop to start.
	return (n + 16) / 8
}