From 844f757aae9b2e4975d4b98f8dc8b5f5fbd69608 Mon Sep 17 00:00:00 2001
From: Alexandre Vassalotti <alexandre@peadrop.com>
Date: Sat, 10 May 2008 19:59:16 +0000
Subject: Cleaned up io._BytesIO.write().

I am amazed that the old code, for inserting null-bytes, actually
worked. Who wrote that thing? Oh, it is me... doh.
---
 Lib/io.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/Lib/io.py b/Lib/io.py
index 0b6907a..c45062d 100644
--- a/Lib/io.py
+++ b/Lib/io.py
@@ -826,14 +826,14 @@ class _BytesIO(BufferedIOBase):
         n = len(b)
         if n == 0:
             return 0
-        newpos = self._pos + n
-        if newpos > len(self._buffer):
+        pos = self._pos
+        if pos > len(self._buffer):
             # Inserts null bytes between the current end of the file
             # and the new write position.
-            padding = b'\x00' * (newpos - len(self._buffer) - n)
-            self._buffer[self._pos:newpos - n] = padding
-        self._buffer[self._pos:newpos] = b
-        self._pos = newpos
+            padding = b'\x00' * (pos - len(self._buffer))
+            self._buffer += padding
+        self._buffer[pos:pos + n] = b
+        self._pos += n
         return n
 
     def seek(self, pos, whence=0):
-- 
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