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1 ## Copyright (C) 2004, 2005, 2007 John W. Eaton |
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2 ## |
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3 ## This file is part of Octave. |
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4 ## |
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5 ## Octave is free software; you can redistribute it and/or modify it |
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6 ## under the terms of the GNU General Public License as published by |
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7 ## the Free Software Foundation; either version 3 of the License, or (at |
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8 ## your option) any later version. |
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9 ## |
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10 ## Octave is distributed in the hope that it will be useful, but |
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 ## General Public License for more details. |
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14 ## |
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15 ## You should have received a copy of the GNU General Public License |
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16 ## along with Octave; see the file COPYING. If not, see |
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17 ## <http://www.gnu.org/licenses/>. |
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18 |
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19 ## -*- texinfo -*- |
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20 ## @deftypefn {Function File} {[@var{c}, @var{maxsize}, @var{endian}] =} computer () |
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21 ## Print or return a string of the form @var{cpu}-@var{vendor}-@var{os} |
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22 ## that identifies the kind of computer Octave is running on. If invoked |
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23 ## with an output argument, the value is returned instead of printed. For |
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24 ## example, |
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25 ## |
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26 ## @example |
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27 ## @group |
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28 ## computer () |
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29 ## @print{} i586-pc-linux-gnu |
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30 ## |
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31 ## x = computer () |
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32 ## @result{} x = "i586-pc-linux-gnu" |
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33 ## @end group |
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34 ## @end example |
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35 ## |
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36 ## If two output arguments are requested, also return the maximum number |
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37 ## of elements for an array. |
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38 ## |
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39 ## If three output arguments are requested, also return the byte order |
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40 ## of the current system as a character (@code{"B"} for big-endian or |
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41 ## @code{"L"} for little-endian). |
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42 ## @end deftypefn |
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43 |
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44 function [c, maxsize, endian] = computer () |
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45 |
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46 if (nargin != 0) |
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47 warning ("computer: ignoring extra arguments"); |
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48 endif |
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49 |
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50 msg = octave_config_info ("canonical_host_type"); |
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51 |
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52 if (strcmp (msg, "unknown")) |
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53 msg = "Hi Dave, I'm a HAL-9000"; |
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54 endif |
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55 |
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56 if (nargout == 0) |
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57 printf ("%s\n", msg); |
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58 else |
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59 c = msg; |
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60 if (strcmp (octave_config_info ("USE_64_BIT_IDX_T"), "true")) |
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61 maxsize = 2^63-1; |
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62 else |
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63 maxsize = 2^31-1; |
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64 endif |
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65 if (octave_config_info ("words_big_endian")) |
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66 endian = "B"; |
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67 elseif (octave_config_info ("words_little_endian")) |
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68 endian = "L"; |
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69 else |
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70 endian = "?"; |
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71 endif |
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72 endif |
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73 |
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74 endfunction |
