blob: 5737e95cf47fdb761f7d8701924b2b62b29ec74a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
written by hand — loosely derived from golang.org/x/crypto/internal/subtle,
but splitting the internal package across a module boundary
-- .mod --
module golang.org/x/internal
-- .info --
{"Version":"v0.1.0","Name":"","Short":"","Time":"2018-07-25T17:24:00Z"}
-- go.mod --
module golang.org/x/internal
-- subtle/aliasing.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.
// +build !appengine
// This is a tiny version of golang.org/x/crypto/internal/subtle.
package subtle
import "unsafe"
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]))
}
-- subtle/aliasing_appengine.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.
// +build appengine
package subtle
import "reflect"
func AnyOverlap(x, y []byte) bool {
return len(x) > 0 && len(y) > 0 &&
reflect.ValueOf(&x[0]).Pointer() <= reflect.ValueOf(&y[len(y)-1]).Pointer() &&
reflect.ValueOf(&y[0]).Pointer() <= reflect.ValueOf(&x[len(x)-1]).Pointer()
}
|
