Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / general-1.3.1 / @dict / subsref.m

diff --git a/octave_packages/general-1.3.1/@dict/subsref.m b/octave_packages/general-1.3.1/@dict/subsref.m
new file mode 100644 (file)
index 0000000..fe0cfc2
--- /dev/null
+++ b/octave_packages/general-1.3.1/@dict/subsref.m
@@ -0,0 +1,73 @@
+## Copyright (C) 2009 VZLU Prague, a.s., Czech Republic
+##
+## 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, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn{Function File} {d =} subsref (d, s)
+## Overloaded subsref for dictionaries.
+## @end deftypefn
+
+## Author: Jaroslav Hajek <highegg@gmail.com>
+
+function varargout = subsref (d, s)
+  if (isempty (s))
+    error ("dict: missing index");
+  endif
+
+  switch (s(1).type)
+    case "()"
+      ind = s(1).subs;
+      if (numel (ind) == 1)
+        ind = ind{1};
+      else
+        error ("dict: needs exactly one index");
+      endif
+      if (ischar (ind))
+        i = lookup (d.keys, ind, "m");
+        if (i)
+          e = d.values {i};
+        else
+          error ("key does not exist: %s", ind);
+        endif
+      elseif (iscellstr (ind))
+        i = lookup (d.keys, ind, "m");
+        if (all (i(:)))
+          e = reshape (d.values (i), size (ind)); # ensure correct shape.
+        else
+          ## Report the first non-existing key.
+          error ("key does not exist: %s", ind{find (i == 0, 1)});
+        endif
+      else
+        error ("invalid index");
+      endif
+    case "."
+      fld = s.subs;
+      switch (fld)
+      case 'keys'
+        e = d.keys;
+      case 'values'
+        e = d.values;
+      otherwise
+        error ("@dict/subsref: invalid property \"%s\"", fld);
+      endswitch
+    otherwise
+      error ("invalid subscript type");
+  endswitch
+
+  if (numel (s) > 1)
+    varargout = {subsref(e, s(2:end))};
+  else
+    varargout = {e};
+  endif
+endfunction