Mercurial > octave-nkf
view scripts/miscellaneous/dir.m @ 16994:333243133364
Use matrix concatenation for strings, rather than cstrcat(), for clarity and performance.
matrix concatenation is ~80% faster than cstrcat().
* doc/interpreter/strings.txi: Document preference for matrix concatenation
as opposed to alternatives.
* doc/interpreter/geometryimages.m, doc/interpreter/interpimages.m,
doc/interpreter/plotimages.m, doc/interpreter/sparseimages.m,
doc/interpreter/splineimages.m, scripts/general/genvarname.m,
scripts/general/int2str.m, scripts/general/num2str.m,
scripts/help/__makeinfo__.m, scripts/help/help.m,
scripts/miscellaneous/copyfile.m, scripts/miscellaneous/dir.m,
scripts/miscellaneous/edit.m, scripts/miscellaneous/fact.m,
scripts/miscellaneous/fullfile.m, scripts/miscellaneous/mkoctfile.m,
scripts/miscellaneous/movefile.m, scripts/miscellaneous/perl.m,
scripts/miscellaneous/python.m, scripts/miscellaneous/run.m,
scripts/miscellaneous/tempdir.m, scripts/miscellaneous/unpack.m,
scripts/pkg/private/configure_make.m, scripts/pkg/private/create_pkgadddel.m,
scripts/pkg/private/extract_pkg.m, scripts/pkg/private/get_description.m,
scripts/pkg/private/get_forge_pkg.m, scripts/pkg/private/getarch.m,
scripts/pkg/private/getarchprefix.m, scripts/pkg/private/install.m,
scripts/pkg/private/installed_packages.m,
scripts/pkg/private/load_packages_and_dependencies.m,
scripts/pkg/private/rebuild.m, scripts/pkg/private/repackage.m,
scripts/pkg/private/shell.m, scripts/pkg/private/uninstall.m,
scripts/plot/private/__go_draw_axes__.m, scripts/signal/spectral_adf.m,
scripts/signal/spectral_xdf.m, scripts/statistics/tests/z_test.m,
scripts/statistics/tests/z_test_2.m, scripts/strings/mat2str.m,
scripts/strings/strtok.m, scripts/testfun/__run_test_suite__.m,
scripts/testfun/assert.m, scripts/testfun/demo.m, scripts/testfun/speed.m,
scripts/testfun/test.m, test/eval-catch.tst, test/io.tst, test/try.tst: Replace
cstrcat() with matrix concatenation where possible.
author | Rik <rik@octave.org> |
---|---|
date | Wed, 17 Jul 2013 14:02:32 -0700 |
parents | d174210ce1ec |
children | 1c89599167a6 |
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## Copyright (C) 2004-2012 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 3 of the License, 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, see ## <http://www.gnu.org/licenses/>. ## -*- texinfo -*- ## @deftypefn {Function File} {} dir (@var{directory}) ## @deftypefnx {Function File} {[@var{list}] =} dir (@var{directory}) ## Display file listing for directory @var{directory}. If a return ## value is requested, return a structure array with the fields ## ## @example ## @group ## name ## bytes ## date ## isdir ## statinfo ## @end group ## @end example ## ## @noindent ## where @code{statinfo} is the structure returned from @code{stat}. ## ## If @var{directory} is not a directory, return information about the ## named @var{filename}. @var{directory} may be a list of directories ## specified either by name or with wildcard characters (like * and ?) ## which will be expanded with glob. ## ## Note that for symbolic links, @code{dir} returns information about ## the file that the symbolic link points to instead of the link itself. ## However, if the link points to a nonexistent file, @code{dir} returns ## information about the link. ## @seealso{ls, stat, lstat, readdir, glob, filesep} ## @end deftypefn ## Author: jwe ## FIXME -- this is quite slow for large directories, so perhaps ## it should be converted to C++. function retval = dir (directory) if (nargin == 0) directory = "."; elseif (nargin > 1) print_usage (); endif ## Prep the retval. info = struct (zeros (0, 1), {"name", "date", "bytes", "isdir", "datenum", "statinfo"}); if (ischar (directory)) if (strcmp (directory, "*")) directory = "."; endif if (strcmp (directory, ".")) flst = {"."}; nf = 1; else flst = glob (directory); nf = length (flst); endif ## Determine the file list for the case where a single directory is ## specified. if (nf == 1) fn = flst{1}; [st, err, msg] = stat (fn); if (err < 0) warning ("dir: 'stat (%s)' failed: %s", fn, msg); nf = 0; elseif (S_ISDIR (st.mode)) flst = readdir (flst{1}); nf = length (flst); for i = 1:nf flst{i} = fullfile (fn, flst{i}); endfor endif endif if (length (flst) > 0) ## Collect results. for i = nf:-1:1 fn = flst{i}; [st, err, msg] = lstat (fn); if (err < 0) warning ("dir: 'lstat (%s)' failed: %s", fn, msg); else ## If we are looking at a link that points to something, ## return info about the target of the link, otherwise, return ## info about the link itself. if (S_ISLNK (st.mode)) [xst, err, msg] = stat (fn); if (! err) st = xst; endif endif [dummy, fn, ext] = fileparts (fn); fn = [fn ext]; info(i,1).name = fn; lt = localtime (st.mtime); info(i,1).date = strftime ("%d-%b-%Y %T", lt); info(i,1).bytes = st.size; info(i,1).isdir = S_ISDIR (st.mode); info(i,1).datenum = datenum (lt.year + 1900, lt.mon + 1, lt.mday, lt.hour, lt.min, lt.sec); info(i,1).statinfo = st; endif endfor endif else error ("dir: expecting directory or filename to be a char array"); endif ## Return the output arguments. if (nargout > 0) ## Return the requested structure. retval = info; elseif (length (info) > 0) ## Print the structure to the screen. printf ("%s", list_in_columns ({info.name})); else warning ("dir: nonexistent directory '%s'", directory); endif endfunction