Diff of /inst/select_sockets.m [000000] .. [0c456c] Maximize Restore

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+## Copyright (C) 2010 Olaf Till <olaf.till@uni-jena.de>
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program; if not, write to the Free Software
+## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{n}, @var{idx}] =} select_sockets
+## (@var{sockets}, @var{timeout}[, @var{nfds}])\n\
+## Calls Unix @code{select}.\n\
+## @var{sockets}: valid sockets matrix as returned by @code{connect}.\n\
+## @var{timeout}: seconds, negative for infinite.\n\
+## @var{nfds}: optional, default is Unix' FD_SETSIZE (platform specific).\n\
+## Passed to Unix @code{select} as the first argument --- see there.\n\
+## An error is returned if nfds or a watched filedescriptor \n\
+## plus one exceeds FD_SETSIZE.\n\
+## Return values are:\n\
+## @var{idx}: index vector to rows in @var{sockets} with pending input\n\
+## readable with @code{recv}.\n\
+## @var{n}: number of rows in @var{sockets} with pending input.\n\
+## @end deftypefn
+
+function [n, ridx] = select_sockets (varargin)
+
+  if ((nargin = columns (varargin)) < 2 || nargin > 3)
+    error ("two or three arguments required");
+  endif
+
+  if (! ismatrix (sockets = varargin{1}) || rows (sockets < 1) || \
+      colums (sockets) != 3)
+    error ("no valid sockets matrix");
+  endif
+
+  [n, ridx] = \
+      select (cat \
+	      (2, {varargin{1}(:, 1)}, {[], []}, varargin(2:end)){:});