Mercurial > hg > octave-nkf
diff src/ov-scalar.cc @ 2376:2142216bf85a
[project @ 1996-10-12 01:39:07 by jwe]
author | jwe |
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date | Sat, 12 Oct 1996 01:39:21 +0000 |
parents | |
children | de430cdd9234 |
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new file mode 100644 --- /dev/null +++ b/src/ov-scalar.cc @@ -0,0 +1,110 @@ +/* + +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. + +*/ + +#if defined (__GNUG__) +#pragma implementation +#endif + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "defun.h" +#include "gripes.h" +#include "oct-obj.h" +#include "ov-scalar.h" +#include "ov-typeinfo.h" +#include "pr-output.h" +#include "xdiv.h" +#include "xpow.h" + +int octave_scalar::t_id = -1; + +const string octave_scalar::t_name ("scalar"); + +static inline bool +valid_scalar_indices (const octave_value_list& args) +{ + int nargin = args.length (); + + for (int i = 0; i < nargin; i++) + if (! args(i).valid_as_scalar_index ()) + return false; + + return true; +} + +octave_value +octave_scalar::index (const octave_value_list& idx) const +{ + octave_value retval; + + if (valid_scalar_indices (idx)) + retval = scalar; + else + { + // XXX FIXME XXX -- this doesn't solve the problem of + // + // a = 1; a([1,1], [1,1], [1,1]) + // + // and similar constructions. Hmm... + + octave_value tmp (matrix_value ()); + + retval = tmp.index (idx); + } + + return retval; +} + +octave_value +octave_scalar::convert_to_str (void) const +{ + octave_value retval; + + if (xisnan (scalar)) + ::error ("invalid conversion from NaN to character"); + else + { + // XXX FIXME XXX -- warn about out of range conversions? + + int i = NINT (scalar); + char s[2]; + s[0] = (char) i; + s[1] = '\0'; + retval = octave_value (s); + } + + return retval; +} + +void +octave_scalar::print (ostream& os) +{ + octave_print_internal (os, scalar, false); +} + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; End: *** +*/