From 10c2b6fbaa333a7fe4c58e5ef6b1186fdb5f8d7e Mon Sep 17 00:00:00 2001
From: John Goerzen <jgoerzen@complete.org>
Date: Tue, 16 Sep 2008 16:51:11 -0500
Subject: [PATCH] Apply new darwin.patch from Vincent Beffara fixes #20 patch
 dated 5/27/2008

---
 offlineimap/imapserver.py | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/offlineimap/imapserver.py b/offlineimap/imapserver.py
index 4c89cca..b0830c7 100644
--- a/offlineimap/imapserver.py
+++ b/offlineimap/imapserver.py
@@ -23,6 +23,9 @@ from threading import *
 import thread, hmac, os, time
 import base64
 
+from StringIO import StringIO
+from platform import system
+
 try:
     # do we have a recent pykerberos?
     have_gss = False
@@ -60,10 +63,42 @@ class UsefulIMAP4(UsefulIMAPMixIn, imaplib.IMAP4):
     def open(self, host = '', port = imaplib.IMAP4_PORT):
         imaplibutil.new_open(self, host, port)
 
+    # This is a hack around Darwin's implementation of realloc() (which
+    # Python uses inside the socket code). On Darwin, we split the
+    # message into 100k chunks, which should be small enough - smaller
+    # might start seriously hurting performance ...
+
+    def read(self, size):
+        if (system() == 'Darwin') and (size>0) :
+            read = 0
+            io = StringIO()
+            while read < size:
+                data = imaplib.IMAP4.read (self, min(size-read,8192))
+                read += len(data)
+                io.write(data)
+            return io.getvalue()
+        else:
+            return imaplib.IMAP4.read (self, size)
+
 class UsefulIMAP4_SSL(UsefulIMAPMixIn, imaplibutil.WrappedIMAP4_SSL):
     def open(self, host = '', port = imaplib.IMAP4_SSL_PORT):
         imaplibutil.new_open_ssl(self, host, port)
 
+    # This is the same hack as above, to be used in the case of an SSL
+    # connexion.
+
+    def read(self, size):
+        if (system() == 'Darwin') and (size>0) :
+            read = 0
+            io = StringIO()
+            while read < size:
+                data = imaplibutil.WrappedIMAP4_SSL.read (self, min(size-read,8192))
+                read += len(data)
+                io.write(data)
+            return io.getvalue()
+        else:
+            return imaplibutil.WrappedIMAP4_SSL.read (self,size)
+
 class UsefulIMAP4_Tunnel(UsefulIMAPMixIn, imaplibutil.IMAP4_Tunnel): pass
 
 class IMAPServer: