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1 ## Copyright (C) 1995, 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 ## -*- texinfo -*- |
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21 ## @deftypefn {Function File} {} strrep (@var{s}, @var{x}, @var{y}) |
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22 ## Replaces all occurrences of the substring @var{x} of the string @var{s} |
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23 ## with the string @var{y}. For example, |
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24 ## |
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25 ## @example |
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26 ## strrep ("This is a test string", "is", "&%$") |
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27 ## @result{} "Th&%$ &%$ a test string" |
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28 ## @end example |
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29 ## @end deftypefn |
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30 |
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31 ## Author: Kurt Hornik <Kurt.Hornik@ci.tuwien.ac.at> |
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32 ## Created: 11 November 1994 |
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33 ## Adapted-By: jwe |
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34 |
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35 function t = strrep (s, x, y) |
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36 |
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37 if (nargin <> 3) |
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38 usage ("strrep (s, x, y)"); |
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39 endif |
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40 |
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41 if (! (isstr (s) && isstr (x) && isstr (y))) |
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42 error ("strrep: all arguments must be strings"); |
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43 endif |
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44 |
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45 if (length (x) > length (s) || isempty (x)) |
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46 t = s; |
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47 return; |
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48 endif |
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49 |
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50 ind = findstr (s, x, 0); |
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51 len = length (ind); |
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52 if (len == 0) |
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53 t = s; |
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54 else |
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55 save_empty_list_elements_ok = empty_list_elements_ok; |
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56 unwind_protect |
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57 empty_list_elements_ok = 1; |
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58 l_x = length (x); |
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59 tmp = s (1 : ind (1) - 1); |
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60 t = strcat (tmp, y); |
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61 for k = 1 : len - 1 |
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62 tmp = s (ind (k) + l_x : ind (k+1) - 1); |
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63 t = strcat (t, tmp, y); |
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64 endfor |
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65 tmp = s (ind(len) + l_x : length (s)); |
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66 t = [t, tmp]; |
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67 unwind_protect_cleanup |
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68 empty_list_elements_ok = save_empty_list_elements_ok; |
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69 end_unwind_protect |
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70 endif |
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71 |
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72 endfunction |
