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// 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

// Log10 returns the decimal logarithm of x.
// The special cases are the same as for Log.

//extern log10
func libc_log10(float64) float64

func Log10(x float64) float64 {
        return libc_log10(x)
}

func log10(x float64) float64 {
        return Log(x) * (1 / Ln10)
}

// Log2 returns the binary logarithm of x.
// The special cases are the same as for Log.

func Log2(x float64) float64 {
        return log2(x)
}

func log2(x float64) float64 {
        return Log(x) * (1 / Ln2)
}