[Pkg-bazaar-commits] ./bzr/unstable r74: compare_files: read in one page at a time rather than

[mbp at sourcefrog.net]

------------------------------------------------------------
revno: 74
committer: mbp at sourcefrog.net
timestamp: Wed 2005-03-23 23:30:39 +1100
message:
  compare_files: read in one page at a time rather than 
  loading the whole file
modified:
  bzrlib/osutils.py
-------------- next part --------------
=== modified file 'bzrlib/osutils.py'
--- a/bzrlib/osutils.py	2005-03-23 06:37:30 +0000
+++ b/bzrlib/osutils.py	2005-03-23 12:30:39 +0000
@@ -172,8 +172,14 @@
 def compare_files(a, b):
     """Returns true if equal in contents"""
     # TODO: don't read the whole thing in one go.
-    result = a.read() == b.read()
-    return result
+    BUFSIZE = 4096
+    while True:
+        ai = a.read(BUFSIZE)
+        bi = b.read(BUFSIZE)
+        if ai != bi:
+            return False
+        if ai == '':
+            return True