1 files changed, 8 insertions, 3 deletions

diff --git a/packets/messages/types/SvcClassInfo.go b/packets/messages/types/SvcClassInfo.go
index fb9dbd8..d41723d 100644
--- a/packets/messages/types/SvcClassInfo.go
+++ b/packets/messages/types/SvcClassInfo.go
@@ -1,8 +1,6 @@
 package types
 
 import (
-        "math"
-
         "github.com/pektezol/bitreader"
 )
 
@@ -24,7 +22,7 @@ func ParseSvcClassInfo(reader *bitreader.ReaderType) SvcClassInfo {
         if createonclient {
                 serverclasses := make([]ServerClass, length)
                 for i := 0; i < int(length); i++ {
-                        id, err := reader.ReadBits(int(math.Log2(float64(length))) + 1)
+                        id, err := reader.ReadBits(HighestBitIndex(uint(length)) + 1)
                         if err != nil {
                                 panic(err)
                         }
@@ -40,3 +38,10 @@ func ParseSvcClassInfo(reader *bitreader.ReaderType) SvcClassInfo {
                 ServerClasses:  serverclasses,
         }
 }
+
+func HighestBitIndex(i uint) int {
+        var j int
+        for j = 31; j >= 0 && (i&(1<<j)) == 0; j-- {
+        }
+        return j
+}