1 files changed, 37 insertions, 0 deletions
diff --git a/vendor/geoip2/geoip2/src/Util.php b/vendor/geoip2/geoip2/src/Util.php
new file mode 100644
index 0000000..ac6d14c
--- /dev/null
+++ b/vendor/geoip2/geoip2/src/Util.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace GeoIp2;
+
+class Util
+{
+    /**
+     * This returns the network in CIDR notation for the given IP and prefix
+     * length. This is for internal use only.
+     *
+     * @internal
+     * @ignore
+     *
+     * @param mixed $ipAddress
+     * @param mixed $prefixLen
+     */
+    public static function cidr($ipAddress, $prefixLen)
+    {
+        $ipBytes = inet_pton($ipAddress);
+        $networkBytes = str_repeat("\0", \strlen($ipBytes));
+
+        $curPrefix = $prefixLen;
+        for ($i = 0; $i < \strlen($ipBytes) && $curPrefix > 0; $i++) {
+            $b = $ipBytes[$i];
+            if ($curPrefix < 8) {
+                $shiftN = 8 - $curPrefix;
+                $b = \chr(0xFF & (\ord($b) >> $shiftN) << $shiftN);
+            }
+            $networkBytes[$i] = $b;
+            $curPrefix -= 8;
+        }
+
+        $network = inet_ntop($networkBytes);
+
+        return "$network/$prefixLen";
+    }
+}