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1 ## Copyright (C) 1996 Kurt Hornik |
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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 2, or (at your option) |
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8 ## 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, write to the Free |
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17 ## Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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18 ## 02111-1307, USA. |
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19 |
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20 ## usage: dec2bin (x) |
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21 ## |
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22 ## Returns the binary number corresponding to the nonnegative integer |
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23 ## x. For example, dec2bin (14) returns "1110". |
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24 |
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25 ## Author: jwe |
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26 |
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27 function y = dec2bin (x) |
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28 |
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29 ## Original version by Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at>. |
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30 |
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31 if (nargin != 1) |
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32 usage ("dec2bin (x)"); |
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33 endif |
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34 |
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35 [nr, nc] = size (x); |
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36 |
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37 len = nr * nc; |
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38 |
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39 x = reshape (x, 1, len); |
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40 |
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41 eleo = empty_list_elements_ok; |
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42 unwind_protect |
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43 empty_list_elements_ok = 1; |
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44 y = []; |
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45 for i = 1:len |
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46 tmp = x (i); |
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47 if (tmp == round (tmp) && tmp >= 0) |
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48 while (tmp >= 2) |
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49 z = fix (tmp ./ 2); |
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50 y = [y, tmp - 2 * z]; |
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51 tmp = z; |
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52 endwhile |
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53 y = [y, tmp]; |
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54 else |
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55 error ("dec2hex: invalid conversion"); |
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56 endif |
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57 endfor |
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58 y = fliplr (y); |
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59 y = setstr (y + toascii ("0")); |
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60 unwind_protect_cleanup |
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61 empty_list_elements_ok = eleo; |
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62 end_unwind_protect |
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63 |
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64 endfunction |
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65 |
