From 3ab6fffbdda5dc2db6e7da2eda996f254210e553 Mon Sep 17 00:00:00 2001
From: Kyle Keen <keenerd@gmail.com>
Date: Fri, 27 Dec 2013 00:40:11 +0100
Subject: [PATCH] rtl_power: MSVC 2010 doesn't have log2()

Signed-off-by: Steve Markgraf <steve@steve-m.de>
---
 src/rtl_power.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/rtl_power.c b/src/rtl_power.c
index 04152fa..68b6fed 100644
--- a/src/rtl_power.c
+++ b/src/rtl_power.c
@@ -219,6 +219,13 @@ int cic_9_tables[][10] = {
 	{9, -199, -362, 5303, -25505, 77489, -25505, 5303, -362, -199},
 };
 
+#ifdef _MSC_VER
+double log2(double n)
+{
+	return log(n) / log(2.0);
+}
+#endif
+
 /* FFT based on fix_fft.c by Roberts, Slaney and Bouras
    http://www.jjj.de/fft/fftpage.html
    16 bit ints for everything