update packages

[CreaPhase.git] / octave_packages / m / set / private / validargs.m

diff --git a/octave_packages/m/set/private/validargs.m b/octave_packages/m/set/private/validargs.m
new file mode 100644 (file)
index 0000000..d6e43b3
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+++ b/octave_packages/m/set/private/validargs.m
@@ -0,0 +1,57 @@
+## Copyright (C) 2000-2012 Paul Kienzle
+## Copyright (C) 2009-2010 Jaroslav Hajek
+##
+## This file is part of Octave.
+##
+## Octave 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.
+##
+## Octave 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 Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## Validate arguments for binary set operation.
+function [x, y] = validargs (caller, x, y, byrows_arg)
+
+  if (nargin == 3)
+    icx = iscellstr (x);
+    icy = iscellstr (y);
+    if (icx || icy)
+      if (icx && ischar (y))
+        y = cellstr (y);
+      elseif (icy && ischar (x))
+        x = cellstr (x);
+      elseif (! (icx && icy))
+        error ("%s: cell array of strings cannot be combined with a nonstring value", caller);
+      endif
+    elseif (! (ismatrix (x) && ismatrix (y)))
+      error ("%s: input arguments must be arrays or cell arrays of strings", caller);
+    endif
+  elseif (nargin == 4)
+    if (strcmpi (byrows_arg, "rows"))
+      if (iscell (x) || iscell (y))
+        error ('%s: cells not supported with "rows"', caller);
+      elseif (! (ismatrix (x) && ismatrix (y)))
+        error ("%s: input arguments must be arrays or cell arrays of strings", caller);
+      else
+        if (ndims (x) > 2 || ndims (y) > 2)
+          error ('%s: need 2-dimensional matrices for "rows"', caller);
+        elseif (columns (x) != columns (y) && ! (isempty (x) || isempty (y)))
+          error ("%s: number of columns must match", caller);
+        endif
+      endif
+    else
+      error ("%s: invalid option: %s", caller, byrows_arg);
+    endif
+  else
+    print_usage (caller);
+  endif
+
+endfunction