From 5ff4c17907d5b19510a62e08fd8d3b11e62b431d Mon Sep 17 00:00:00 2001 From: Ondřej Surý Date: Tue, 13 Sep 2011 13:13:40 +0200 Subject: Imported Upstream version 60 --- src/pkg/math/fabs.go | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/pkg/math/fabs.go (limited to 'src/pkg/math/fabs.go') diff --git a/src/pkg/math/fabs.go b/src/pkg/math/fabs.go new file mode 100644 index 000000000..343123126 --- /dev/null +++ b/src/pkg/math/fabs.go @@ -0,0 +1,21 @@ +// 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 + +// Fabs returns the absolute value of x. +// +// Special cases are: +// Fabs(+Inf) = +Inf +// Fabs(-Inf) = +Inf +// Fabs(NaN) = NaN +func Fabs(x float64) float64 { + switch { + case x < 0: + return -x + case x == 0: + return 0 // return correctly fabs(-0) + } + return x +} -- cgit v1.2.3