wifi: Move log2 to wifi utils

src/wifi/model/wifi-utils.cc

@@ -23,6 +23,13 @@
 
 namespace ns3 {
 
+double
+Log2 (double val)
+{
+  return std::log (val) / std::log (2.0);
+}
+
+
 double
 DbToRatio (double dB)
 {

src/wifi/model/wifi-utils.h

@@ -27,6 +27,14 @@
 
 namespace ns3 {
 
+ /**
+  * Return the logarithm of the given value to base 2.
+  *
+  * \param val
+  *
+  * \return the logarithm of val to base 2.
+  */
+  double Log2 (double val);
 /**
  * Convert from dBm to Watts.
  *

src/wifi/model/yans-error-rate-model.cc

@@ -20,6 +20,7 @@
  */
 
 #include "yans-error-rate-model.h"
+#include "wifi-utils.h"
 #include "wifi-phy.h"
 #include "ns3/log.h"
 
@@ -44,12 +45,6 @@ YansErrorRateModel::YansErrorRateModel ()
 {
 }
 
-double
-YansErrorRateModel::Log2 (double val) const
-{
-  return std::log (val) / std::log (2.0);
-}
-
 double
 YansErrorRateModel::GetBpskBer (double snr, uint32_t signalSpread, uint64_t phyRate) const
 {

src/wifi/model/yans-error-rate-model.h

@@ -66,14 +66,6 @@ public:
 
 
 private:
-  /**
-   * Return the logarithm of the given value to base 2.
-   *
-   * \param val
-   *
-   * \return the logarithm of val to base 2.
-   */
-  double Log2 (double val) const;
   /**
    * Return BER of BPSK with the given parameters.
    *