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comparison scripts/miscellaneous/dbstack.m @ 7736:a059b5679fbb

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implement dbstack
author John W. Eaton <jwe@octave.org>
date Fri, 25 Apr 2008 15:11:03 -0400
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7735:6848970153ba 7736:a059b5679fbb
1 ## Copyright (C) 2008 John W. Eaton
2 ##
3 ## This file is part of Octave.
4 ##
5 ## Octave is free software; you can redistribute it and/or modify it
6 ## under the terms of the GNU General Public License as published by
7 ## the Free Software Foundation; either version 3 of the License, or (at
8 ## your option) any later version.
9 ##
10 ## Octave is distributed in the hope that it will be useful, but
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 ## General Public License for more details.
14 ##
15 ## You should have received a copy of the GNU General Public License
16 ## along with Octave; see the file COPYING. If not, see
17 ## <http://www.gnu.org/licenses/>.
18
19 ## -*- texinfo -*-
20 ## @deftypefn {Loadable Function} {[@var{stack}, @var{idx}]} dbstack (@var{n})
21 ## Print or return current stack information. With optional argument
22 ## @var{n}, omit the @var{n} innermost stack frames.
23 ## @seealso{dbclear, dbstatus, dbstop}
24 ## @end deftypefn
25
26 ## Author: jwe
27
28 function [stack, idx] = dbstack (n = 0)
29
30 if (n < 0 || round (n) != n)
31 error ("dbstack: expecting N to be a non-negative integer");
32 endif
33
34 ## Add one here to skip the dbstack stack frame.
35 [t_stack, t_idx] = __dbstack__ (n+1);
36
37 if (nargout == 0)
38 nframes = numel (t_stack);
39 if (nframes > 0)
40 puts ("Stopped in:\n\n");
41 for i = 1:nframes
42 if (i == t_idx)
43 puts ("--> ");
44 else
45 puts (" ");
46 endif
47 f = t_stack(i);
48 printf ("%s at line %d column %d\n", f.name, f.line, f.column);
49 endfor
50 endif
51 else
52 stack = t_stack;
53 idx = t_idx;
54 endif
55
56 endfunction