# Copyright (C) 1996 John W. Eaton
#
# 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 2, 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, write to the Free
# Software Foundation, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

function d = hex2dec (h)

# usage:  hex2dec (h)
#
# Returns the decimal number corresponding to the hex number in
# quotes.  For example, hex2dec ("12B") and hex2dec ("12b") both
# return 299.

# Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>.

  if (nargin != 1)
    usage ("hex2dec (x)");
  endif

  if (isstr (h))
    nr = rows (h);
    d = zeros (nr, 1);
    for i = 1:nr
      s = h (i, :);
      if (isxdigit (s))
	tmp = sscanf (s, "%x");
	if (isempty (tmp))
	  error ("hex2dec: invalid conversion");
	else
	  d (i) = tmp;
	endif
      else
	error ("hex2dec: argument must be a string of hexadecimal digits");
      endif
    endfor
  else
    error ("hex2dec: expecting a string argument");
  endif

endfunction