Editando: modf.go
// 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 // Modf returns integer and fractional floating-point numbers // that sum to f. Both values have the same sign as f. // // Special cases are: // // Modf(±Inf) = ±Inf, NaN // Modf(NaN) = NaN, NaN func Modf(f float64) (int float64, frac float64) { if haveArchModf { return archModf(f) } return modf(f) } func modf(f float64) (int float64, frac float64) { if f < 1 { switch { case f < 0: int, frac = Modf(-f) return -int, -frac case f == 0: return f, f // Return -0, -0 when f == -0 } return 0, f } x := Float64bits(f) e := uint(x>>shift)&mask - bias // Keep the top 12+e bits, the integer part; clear the rest. if e < 64-12 { x &^= 1<<(64-12-e) - 1 } int = Float64frombits(x) frac = f - int return }
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