Mercurial > octave
view scripts/miscellaneous/computer.m @ 23219:3ac9f9ecfae5 stable
maint: Update copyright dates.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 22 Feb 2017 12:39:29 -0500 |
parents | e9a0469dedd9 |
children | 092078913d54 |
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## Copyright (C) 2004-2017 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 {} {} computer () ## @deftypefnx {} {@var{c} =} computer () ## @deftypefnx {} {[@var{c}, @var{maxsize}] =} computer () ## @deftypefnx {} {[@var{c}, @var{maxsize}, @var{endian}] =} computer () ## @deftypefnx {} {@var{arch} =} computer ("arch") ## Print or return a string of the form @var{cpu}-@var{vendor}-@var{os} that ## identifies the type of computer that Octave is running on. ## ## If invoked with an output argument, the value is returned instead of ## printed. For example: ## ## @example ## @group ## computer () ## @print{} i586-pc-linux-gnu ## ## mycomp = computer () ## @result{} mycomp = "i586-pc-linux-gnu" ## @end group ## @end example ## ## If two output arguments are requested, also return the maximum number of ## elements for an array. This will depend on whether Octave has been ## compiled with 32-bit or 64-bit index vectors. ## ## If three output arguments are requested, also return the byte order of the ## current system as a character (@qcode{"B"} for big-endian or @qcode{"L"} ## for little-endian). ## ## If the argument @qcode{"arch"} is specified, return a string indicating the ## architecture of the computer on which Octave is running. ## @seealso{isunix, ismac, ispc} ## @end deftypefn function [c, maxsize, endian] = computer (a) if (nargin > 1) print_usage (); elseif (nargin == 1 && ! strcmpi (a, "arch")) error ('computer: "arch" is only valid argument'); endif if (nargin == 0) msg = __octave_config_info__ ("canonical_host_type"); if (strcmp (msg, "unknown")) msg = "Hi Dave, I'm a HAL-9000"; endif if (nargout == 0) disp (msg); else c = msg; if (isargout (2)) if (__octave_config_info__ ("ENABLE_64")) maxsize = 2^63-1; else maxsize = 2^31-1; endif endif if (isargout (3)) if (__octave_config_info__ ("words_big_endian")) endian = "B"; elseif (__octave_config_info__ ("words_little_endian")) endian = "L"; else endian = "?"; endif endif endif else ## "arch" argument asked for tmp = ostrsplit (__octave_config_info__ ("canonical_host_type"), "-"); if (numel (tmp) == 4) c = sprintf ("%s-%s-%s", tmp{4}, tmp{3}, tmp{1}); else c = sprintf ("%s-%s", tmp{3}, tmp{1}); endif endif endfunction %!assert (ischar (computer ())) %!assert (computer (), __octave_config_info__ ("canonical_host_type")) %!assert (ischar (computer ("arch"))) %!error computer (1,2) %!error <"arch" is only valid argument> computer ("xyz")