Merge: Nitiwiki next

[nit.git] / lib / socket / socket_c.nit

diff --git a/lib/socket/socket_c.nit b/lib/socket/socket_c.nit
index c36d1fe..03d9ddc 100644 (file)
--- a/lib/socket/socket_c.nit
+++ b/lib/socket/socket_c.nit
@@ -332,7 +332,9 @@ class NativeSocketObserver
        # are boxed objects, passing them to a C function is illegal.
        fun select(max: NativeSocket, reads: nullable NativeSocketSet, write: nullable NativeSocketSet,
                         except: nullable NativeSocketSet, timeout: NativeTimeval): Int `{
-               fd_set *rds, *wts, *exs = NULL;
+               fd_set *rds = NULL,
+                      *wts = NULL,
+                      *exs = NULL;
                struct timeval *tm = NULL;
                if (reads != NULL) rds = (fd_set*)reads;
                if (write != NULL) wts = (fd_set*)write;
@@ -486,4 +488,46 @@ redef class Sys
        fun gethostbyname(name: NativeString): NativeSocketHostent `{
                return gethostbyname(name);
        `}
+
+       # Last error raised by `gethostbyname`
+       fun h_errno: HErrno `{ return h_errno; `}
+end
+
+# Error code of `Sys::h_errno`
+extern class HErrno `{ int `}
+       # The specified host is unknown
+       fun host_not_found: Bool `{ return self == HOST_NOT_FOUND; `}
+
+       # The requested name is valid but does not have an IP address
+       #
+       # Same as `no_data`.
+       fun no_address: Bool `{ return self == NO_ADDRESS; `}
+
+       # The requested name is valid byt does not have an IP address
+       #
+       # Same as `no_address`.
+       fun no_data: Bool `{ return self == NO_DATA; `}
+
+       # A nonrecoverable name server error occurred
+       fun no_recovery: Bool `{ return self == NO_RECOVERY; `}
+
+       # A temporary error occurred on an authoritative name server, try again later
+       fun try_again: Bool `{ return self == TRY_AGAIN; `}
+
+       redef fun to_s
+       do
+               if host_not_found then
+                       return "The specified host is unknown"
+               else if no_address then
+                       return "The requested name is valid but does not have an IP address"
+               else if no_recovery then
+                       return "A nonrecoverable name server error occurred"
+               else if try_again then
+                       return "A temporary error occurred on an authoritative name server, try again later"
+               else
+                       # This may happen if another call was made to `gethostbyname`
+                       # before we fetch the error code.
+                       return "Unknown error on `gethostbyname`"
+               end
+       end
 end