gotosocial/vendor/golang.org/x/crypto/internal/alias/alias.go
kim a156188b3e
[chore] update dependencies, bump to Go 1.19.1 (#826)
* update dependencies, bump Go version to 1.19

* bump test image Go version

* update golangci-lint

* update gotosocial-drone-build

* sign

* linting, go fmt

* update swagger docs

* update swagger docs

* whitespace

* update contributing.md

* fuckin whoopsie doopsie

* linterino, linteroni

* fix followrequest test not starting processor

* fix other api/client tests not starting processor

* fix remaining tests where processor not started

* bump go-runners version

* don't check last-webfingered-at, processor may have updated this

* update swagger command

* update bun to latest version

* fix embed to work the same as before with new bun

Signed-off-by: kim <grufwub@gmail.com>
Co-authored-by: tsmethurst <tobi.smethurst@protonmail.com>
2022-09-28 18:30:40 +01:00

33 lines
1.1 KiB
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 !purego
// +build !purego
// Package alias implements memory aliasing tests.
package alias
import "unsafe"
// AnyOverlap reports whether x and y share memory at any (not necessarily
// corresponding) index. The memory beyond the slice length is ignored.
func AnyOverlap(x, y []byte) bool {
return len(x) > 0 && len(y) > 0 &&
uintptr(unsafe.Pointer(&x[0])) <= uintptr(unsafe.Pointer(&y[len(y)-1])) &&
uintptr(unsafe.Pointer(&y[0])) <= uintptr(unsafe.Pointer(&x[len(x)-1]))
}
// InexactOverlap reports whether x and y share memory at any non-corresponding
// index. The memory beyond the slice length is ignored. Note that x and y can
// have different lengths and still not have any inexact overlap.
//
// InexactOverlap can be used to implement the requirements of the crypto/cipher
// AEAD, Block, BlockMode and Stream interfaces.
func InexactOverlap(x, y []byte) bool {
if len(x) == 0 || len(y) == 0 || &x[0] == &y[0] {
return false
}
return AnyOverlap(x, y)
}