Mercurial > hg > octave-lyh
changeset 1810:f988f753ab52
[project @ 1996-01-29 07:30:21 by jwe]
Initial revision
author | jwe |
---|---|
date | Mon, 29 Jan 1996 07:30:21 +0000 |
parents | 4100e0cb00a1 |
children | 3031937966fb |
files | liboctave/str-vec.cc |
diffstat | 1 files changed, 107 insertions(+), 0 deletions(-) [+] |
line wrap: on
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new file mode 100644 --- /dev/null +++ b/liboctave/str-vec.cc @@ -0,0 +1,107 @@ +// str-vec.cc -*- C++ -*- +/* + +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. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <string> + +#include <iostream.h> + +#include "oct-term.h" +#include "str-vec.h" + +// Format a list in neat columns. Mostly stolen from GNU ls. + +ostream& +string_vector::list_in_columns (ostream& os) const +{ + // Compute the maximum name length. + + int max_name_length = 0; + int total_names = length (); + + for (int i = 0; i < total_names; i++) + { + int name_length = elem (i).length (); + if (name_length > max_name_length) + max_name_length = name_length; + } + + // Allow at least two spaces between names. + + max_name_length += 2; + + // Calculate the maximum number of columns that will fit. + + int line_length = terminal_columns (); + int cols = line_length / max_name_length; + if (cols == 0) + cols = 1; + + // Calculate the number of rows that will be in each column except + // possibly for a short column on the right. + + int rows = total_names / cols + (total_names % cols != 0); + + // Recalculate columns based on rows. + + cols = total_names / rows + (total_names % rows != 0); + + int count; + for (int row = 0; row < rows; row++) + { + count = row; + int pos = 0; + + // Print the next row. + + while (1) + { + string nm = elem (count); + + os << nm; + int name_length = nm.length (); + + count += rows; + if (count >= total_names) + break; + + int spaces_to_pad = max_name_length - name_length; + for (int i = 0; i < spaces_to_pad; i++) + os << " "; + pos += max_name_length; + } + os << "\n"; + } + + return os; +} + +/* +;;; Local Variables: *** +;;; mode: C++ *** +;;; page-delimiter: "^/\\*" *** +;;; End: *** +*/