/usr/share/go-1.8/src/math/abs.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | // Copyright 2009 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.
package math
// Abs returns the absolute value of x.
//
// Special cases are:
// Abs(±Inf) = +Inf
// Abs(NaN) = NaN
func Abs(x float64) float64 {
// TODO: once golang.org/issue/13095 is fixed, change this to:
// return Float64frombits(Float64bits(x) &^ (1 << 63))
// But for now, this generates better code and can also be inlined:
if x < 0 {
return -x
}
if x == 0 {
return 0 // return correctly abs(-0)
}
return x
}
|