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author | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
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committer | Ondřej Surý <ondrej@sury.org> | 2011-09-13 13:13:40 +0200 |
commit | 5ff4c17907d5b19510a62e08fd8d3b11e62b431d (patch) | |
tree | c0650497e988f47be9c6f2324fa692a52dea82e1 /src/pkg/cmath/isinf.go | |
parent | 80f18fc933cf3f3e829c5455a1023d69f7b86e52 (diff) | |
download | golang-upstream/60.tar.gz |
Imported Upstream version 60upstream/60
Diffstat (limited to 'src/pkg/cmath/isinf.go')
-rw-r--r-- | src/pkg/cmath/isinf.go | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/pkg/cmath/isinf.go b/src/pkg/cmath/isinf.go new file mode 100644 index 000000000..f23d2dea7 --- /dev/null +++ b/src/pkg/cmath/isinf.go @@ -0,0 +1,21 @@ +// Copyright 2010 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 cmath + +import "math" + +// IsInf returns true if either real(x) or imag(x) is an infinity. +func IsInf(x complex128) bool { + if math.IsInf(real(x), 0) || math.IsInf(imag(x), 0) { + return true + } + return false +} + +// Inf returns a complex infinity, complex(+Inf, +Inf). +func Inf() complex128 { + inf := math.Inf(1) + return complex(inf, inf) +} |