Correct inf. while loop.

diff --git a/Lib/re.py b/Lib/re.py
index e9b20c5c86b301e790c0a2b56945c4f74a64a0cf..904522fc3d56d102c6f1cceff86a05a8216267d6 100644 (file)
--- a/Lib/re.py
+++ b/Lib/re.py
@@ -58,20 +58,34 @@ def valid_identifier(id):
 #
 #
 
+_cache = {}
+_MAXCACHE = 20
+def _cachecompile(pattern, flags):
+    key = (pattern, flags)
+    try:
+       return _cache[key]
+    except KeyError:
+       pass
+    value = compile(pattern, flags)
+    if len(_cache) >= _MAXCACHE:
+       _cache.clear()
+    _cache[key] = value
+    return value
+
 def match(pattern, string, flags=0):
-    return compile(pattern, flags).match(string)
+    return _cachecompile(pattern, flags).match(string)
 
 def search(pattern, string, flags=0):
-    return compile(pattern, flags).search(string)
+    return _cachecompile(pattern, flags).search(string)
 
 def sub(pattern, repl, string, count=0):
-    return compile(pattern).sub(repl, string, count)
+    return _cachecompile(pattern).sub(repl, string, count)
 
 def subn(pattern, repl, string, count=0):
-    return compile(pattern).subn(repl, string, count)
+    return _cachecompile(pattern).subn(repl, string, count)
 
 def split(pattern, string, maxsplit=0):
-    return compile(pattern).subn(string, maxsplit)
+    return _cachecompile(pattern).subn(string, maxsplit)
 
 #
 #
@@ -1064,6 +1078,7 @@ def compile(pattern, flags=0):
                                    Label(label)] + \
                                   stack[-1] + \
                                   [Label(label + 1)]
+                           max = max - 1
                            label = label + 2
                        del stack[-1]
                        stack.append(expr)