Add python xdb maker

maker/python/xdb/util.py

@@ -0,0 +1,42 @@
+#  Created by leolin49 on 2022/7/7.
+#  Copyright (C) 2022 leolin49. All rights reserved.
+
+shift_index = (24, 16, 8, 0)
+# Util function
+
+
+def checkip(ip: str) -> int:
+    """Convert ip string to integer."""
+    if not is_ipv4(ip):
+        return -1
+    ps = ip.split(".")
+    if len(ps) != 4:
+        return 0
+    val = 0
+    for i in range(len(ps)):
+        d = int(ps[i])
+        if d < 0 or d > 255:
+            return 0
+        val |= d << shift_index[i]
+    return val
+
+
+def long2ip(num: int) -> str:
+    """Convert integer to ip string."""
+    return "{}.{}.{}.{}".format((num >> 24) & 0xFF, (num >> 16) & 0xFF, (num >> 8) & 0xFF, num & 0xFF)
+
+
+def mid_ip(sip: int, eip: int):
+    """Get the middle ip between sip and eip."""
+    return (sip + eip) >> 1
+
+
+def is_ipv4(ip: str) -> bool:
+    """Determine whether it is an ipv4 address."""
+    p = ip.split(".")
+    if len(p) != 4:
+        return False
+    for pp in p:
+        if not pp.isdigit() or len(pp) > 3 or int(pp) > 255:
+            return False
+    return True