[Forensics-changes] [yara] 378/407: Implement log2 function for VC++

[Hilko Bengen]

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bengen pushed a commit to annotated tag v3.3.0
in repository yara.

commit d0a9aeffecf3dda9211040c025424395b63d91fe
Author: Victor M. Alvarez <plusvic at gmail.com>
Date:   Thu Feb 5 12:35:05 2015 +0100

    Implement log2 function for VC++
---
 libyara/modules/math.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/libyara/modules/math.c b/libyara/modules/math.c
index 36f5278..660b981 100644
--- a/libyara/modules/math.c
+++ b/libyara/modules/math.c
@@ -23,6 +23,15 @@ limitations under the License.
 
 #define PI 3.141592653589793
 
+// log2 is not defined by math.h in VC++
+
+#ifdef _MSC_VER
+double log2(double n)
+{
+  return log(n) / log(2);
+}
+#endif
+
 
 define_function(string_entropy)
 {

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