From ec50b892e5d3bc6f585780ebbbf071d489b2c3ae Mon Sep 17 00:00:00 2001
From: Eric Wong <normalperson@yhbt.net>
Date: Tue, 4 May 2010 14:56:44 -0700
Subject: revactor: match IO behavior for readpartial wrapper

IO#readpartial on zero bytes will always return an empty
string, so ensure the emulator for Revactor does that as
well.
---
 lib/rainbows/revactor.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/rainbows/revactor.rb b/lib/rainbows/revactor.rb
index 21fa72f..b1f0d9b 100644
--- a/lib/rainbows/revactor.rb
+++ b/lib/rainbows/revactor.rb
@@ -149,6 +149,7 @@ module Rainbows
       # Revactor socket reads always return an unspecified amount,
       # sometimes too much
       def readpartial(length, dst = "")
+        return dst if length == 0
         # always check and return from the userspace buffer first
         rbuf.size > 0 and return dst.replace(rbuf.read(length))
 
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