add hg and python

sys/lib/python/mercurial/strutil.py

@@ -0,0 +1,34 @@
+# strutil.py - string utilities for Mercurial
+#
+# Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com>
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+def findall(haystack, needle, start=0, end=None):
+    if end is None:
+        end = len(haystack)
+    if end < 0:
+        end += len(haystack)
+    if start < 0:
+        start += len(haystack)
+    while start < end:
+        c = haystack.find(needle, start, end)
+        if c == -1:
+            break
+        yield c
+        start = c + 1
+
+def rfindall(haystack, needle, start=0, end=None):
+    if end is None:
+        end = len(haystack)
+    if end < 0:
+        end += len(haystack)
+    if start < 0:
+        start += len(haystack)
+    while end >= 0:
+        c = haystack.rfind(needle, start, end)
+        if c == -1:
+            break
+        yield c
+        end = c - 1