lib/socket: refactor IOError from errnos into contructors

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/socket/socket.nit b/lib/socket/socket.nit
index d20bc0c..52d7d3a 100644 (file)
--- a/lib/socket/socket.nit
+++ b/lib/socket/socket.nit
@@ -89,8 +89,7 @@ class TCPStream
                var hostent = sys.gethostbyname(host.to_cstring)
                if hostent.address_is_null then
                        # Error in name lookup
-                       var err = sys.h_errno
-                       last_error = new IOError(err.to_s)
+                       last_error = new IOError.from_h_errno
 
                        closed = true
                        end_reached = true
@@ -109,7 +108,7 @@ class TCPStream
                end_reached = closed
                if closed then
                        # Connection failed
-                       last_error = new IOError(errno.strerror)
+                       last_error = new IOError.from_errno
                end
 
                prepare_buffer(1024)
@@ -358,3 +357,13 @@ class SocketObserver
                return native.select(max.native, read_set.native, write_set.native, except_set.native, timeval) > 0
        end
 end
+
+redef class IOError
+       # Fill a new `IOError` from the message of `errno`
+       init from_errno do init errno.strerror
+
+       # Fill a new `IOError` from the message of `h_errno`
+       #
+       # Used with `gethostbyname`.
+       init from_h_errno do init h_errno.to_s
+end