Remove list usage for IpTreeNode

database.py

@@ -88,7 +88,8 @@ class DomainTreeNode():
 
 class IpTreeNode():
     def __init__(self) -> None:
-        self.children: typing.List[typing.Optional[IpTreeNode]] = [None, None]
+        self.zero: typing.Optional[IpTreeNode] = None
+        self.one: typing.Optional[IpTreeNode] = None
         self.match = Match()
 
 
@@ -131,7 +132,7 @@ class Profiler():
 
 
 class Database(Profiler):
-    VERSION = 10
+    VERSION = 11
     PATH = "blocking.p"
 
     def initialize(self) -> None:
@@ -258,7 +259,7 @@ class Database(Profiler):
         callback(_par, _dic, arg)
 
         # 0
-        dic = _dic.children[0]
+        dic = _dic.zero
         if dic:
             addr0 = _par.value & (0xFFFFFFFF ^ (1 << (32-_par.prefixlen)))
             assert addr0 == _par.value
@@ -269,7 +270,7 @@ class Database(Profiler):
                 _par=Ip4Path(addr0, _par.prefixlen+1)
             )
         # 1
-        dic = _dic.children[1]
+        dic = _dic.one
         if dic:
             addr1 = _par.value | (1 << (32-_par.prefixlen))
             yield from self.exec_each_ip4(
@@ -351,7 +352,7 @@ class Database(Profiler):
                 self.enter_step('get_ip4_yield')
                 yield Ip4Path(ip4.value, 32-i)
             self.enter_step('get_ip4_brws')
-            next_dic = dic.children[part]
+            next_dic = dic.one if part else dic.zero
             if next_dic is None:
                 return
             dic = next_dic
@@ -432,10 +433,13 @@ class Database(Profiler):
             if dic.match.active():
                 # Refuse to add ip4* whose network is already matching
                 return
-            next_dic = dic.children[part]
+            next_dic = dic.one if part else dic.zero
             if next_dic is None:
                 next_dic = IpTreeNode()
-                dic.children[part] = next_dic
+                if part:
+                    dic.one = next_dic
+                else:
+                    dic.zero = next_dic
             dic = next_dic
         dic.match.set(
             updated,