[ruby/openssl] Add SSLSocket#getbyte

Normal sockets respond to `getbyte`, so we should make SSLSocket respond
to `getbyte` as well.  This way we can substitute SSLSockets for regular
sockets.

https://github.com/ruby/openssl/commit/ac1490b7c9

1 files changed, 19 insertions, 0 deletions

diff --git a/ext/openssl/lib/openssl/buffering.rb b/ext/openssl/lib/openssl/buffering.rb
index 32e04b4896..116179d21f 100644
--- a/ext/openssl/lib/openssl/buffering.rb
+++ b/ext/openssl/lib/openssl/buffering.rb
@@ -99,8 +99,27 @@ module OpenSSL::Buffering
     end
   end
 
+  if "".respond_to?(:unpack1)
+    def unpack_byte(str)
+      str.unpack1("C")
+    end
+  else
+    def unpack_byte(str)
+      str.unpack("C").first
+    end
+  end
+
   public
 
+  # call-seq:
+  #   ssl.getbyte => 81
+  #
+  # Get the next 8bit byte from `ssl`.  Returns `nil` on EOF
+  def getbyte
+    byte = read(1)
+    byte && unpack_byte(byte)
+  end
+
   ##
   # Reads _size_ bytes from the stream.  If _buf_ is provided it must
   # reference a string which will receive the data.