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+++ b/scripts/general/bitset.m
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+## Copyright (C) 2004 David BAteman
+##
+## 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 2 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{X} =} bitset (@var{a},@var{n})
+## @deftypefnx {Function File} {@var{X} =} bitset (@var{a},@var{n},@var{v})
+## sets or resets bit(s) @var{N} of unsigned integers in @var{A}.
+## @var{v} = 0 resets and @var{v} = 1 sets the bits.
+## The lowest significant bit is: @var{n} = 1
+##
+## @example
+## dec2bin (bitset(10,1))
+## @result{} 1011
+## @end example
+##
+## @seealso{bitand,bitor,bitxor,bitget,bitcmp,bitshift,bitmax}
+## @end deftypefn
+
+## Liberally based of the version by Kai Habel from octave-forge
+
+function X = bitset (A, n, value)
+  if (nargin < 2 || nargin > 3)
+    usage ("bitset (A, n, v)");
+  endif
+
+  if (nargin == 2)
+    value = 1;
+  endif
+  
+  cname = class(A);
+  if (strcmp (cname, "double"))
+    Bmax = bitmax;
+    Amax = log2 (Bmax) + 1;
+  elseif strcmp("uint",substr(cname,1,4))
+    Bmax = intmax(cname);
+    Amax = eval([cname, " (log2 (double (intmax (cname))) + 1);"]);
+  else
+    Bmax = eval([cname, " (-1);"]);
+    Amax = eval([cname, " (log2 (double (intmax (cname))) + 2);"]);
+  endif
+
+  Aone = eval([ cname, "(1);"]);
+  m = eval([cname, " (n(:));"]);
+  if (any(m < Aone) || any( m > Amax))
+    error ("n must be in the range [1,%d]", Amax);
+  endif
+
+  ## XXX FIXME XXX Need extra cast to cname due to bad return value of .^
+  X = eval (["bitand (A, Bmax - ", cname, " (", cname, " (2) .^ (", cname, " (n) - Aone)));"]);
+
+  if (value)
+    X = eval (["bitor (A, ", cname, " (2) .^ (", cname, " (n) - Aone));"]);
+  endif
+
+endfunction