Start to remove the extra buffering in openssl/buffering.rb

gistfile1.diff

diff --git a/lib/ruby/1.9/openssl/buffering.rb b/lib/ruby/1.9/openssl/buffering.rb
index 51bc968..f07a55f 100644
--- a/lib/ruby/1.9/openssl/buffering.rb
+++ b/lib/ruby/1.9/openssl/buffering.rb
@@ -81,24 +81,7 @@ module OpenSSL::Buffering
   # See IO#read for full details.
 
   def read(size=nil, buf=nil)
-    if size == 0
-      if buf
-        buf.clear
-        return buf
-      else
-        return ""
-      end
-    end
-    until @eof
-      break if size && size <= @rbuffer.size
-      fill_rbuff
-    end
-    ret = consume_rbuff(size) || ""
-    if buf
-      buf.replace(ret)
-      ret = buf
-    end
-    (size && ret.empty?) ? nil : ret
+    sysread(size, buf)
   end
 
   ##
@@ -108,28 +91,11 @@ module OpenSSL::Buffering
   # See IO#readpartial for full details.
 
   def readpartial(maxlen, buf=nil)
-    if maxlen == 0
-      if buf
-        buf.clear
-        return buf
-      else
-        return ""
-      end
-    end
-    if @rbuffer.empty?
-      begin
-        return sysread(maxlen, buf)
-      rescue Errno::EAGAIN
-        retry
-      end
-    end
-    ret = consume_rbuff(maxlen)
-    if buf
-      buf.replace(ret)
-      ret = buf
+    begin
+      return sysread(maxlen, buf)
+    rescue Errno::EAGAIN
+      retry
     end
-    raise EOFError if ret.empty?
-    ret
   end
 
   ##
@@ -162,24 +128,7 @@ module OpenSSL::Buffering
   # more details.  http://www.openssl.org/support/faq.html
 
   def read_nonblock(maxlen, buf=nil)
-    if maxlen == 0
-      if buf
-        buf.clear
-        return buf
-      else
-        return ""
-      end
-    end
-    if @rbuffer.empty?
-      return sysread_nonblock(maxlen, buf)
-    end
-    ret = consume_rbuff(maxlen)
-    if buf
-      buf.replace(ret)
-      ret = buf
-    end
-    raise EOFError if ret.empty?
-    ret
+    sysread_nonblock(maxlen, buf)
   end
 
   ##