golang.org_x_internal_v0.1.0.txt

     1  written by hand — loosely derived from golang.org/x/crypto/internal/subtle,
     2  but splitting the internal package across a module boundary
     3  
     4  -- .mod --
     5  module golang.org/x/internal
     6  -- .info --
     7  {"Version":"v0.1.0","Name":"","Short":"","Time":"2018-07-25T17:24:00Z"}
     8  -- go.mod --
     9  module golang.org/x/internal
    10  -- subtle/aliasing.go --
    11  // Copyright 2018 The Go Authors. All rights reserved.
    12  // Use of this source code is governed by a BSD-style
    13  // license that can be found in the LICENSE file.
    14  
    15  // +build !appengine
    16  
    17  // This is a tiny version of golang.org/x/crypto/internal/subtle.
    18  
    19  package subtle
    20  
    21  import "unsafe"
    22  
    23  func AnyOverlap(x, y []byte) bool {
    24  	return len(x) > 0 && len(y) > 0 &&
    25  		uintptr(unsafe.Pointer(&x[0])) <= uintptr(unsafe.Pointer(&y[len(y)-1])) &&
    26  		uintptr(unsafe.Pointer(&y[0])) <= uintptr(unsafe.Pointer(&x[len(x)-1]))
    27  }
    28  -- subtle/aliasing_appengine.go --
    29  // Copyright 2018 The Go Authors. All rights reserved.
    30  // Use of this source code is governed by a BSD-style
    31  // license that can be found in the LICENSE file.
    32  
    33  // +build appengine
    34  
    35  package subtle
    36  
    37  import "reflect"
    38  
    39  func AnyOverlap(x, y []byte) bool {
    40  	return len(x) > 0 && len(y) > 0 &&
    41  		reflect.ValueOf(&x[0]).Pointer() <= reflect.ValueOf(&y[len(y)-1]).Pointer() &&
    42  		reflect.ValueOf(&y[0]).Pointer() <= reflect.ValueOf(&x[len(x)-1]).Pointer()
    43  }
    44
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