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annotate scripts/strings/strsplit.m @ 11529:f98f925d8e5c

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Add undocumented function erfcx to documentation.
author Rik <octave@nomad.inbox5.com>
date Fri, 14 Jan 2011 11:59:59 -0800
parents fd0a3ac60b0e
children c792872f8942
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1 ## Copyright (C) 2009-2011 Jaroslav Hajek
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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{s}] =} strsplit (@var{p}, @var{sep}, @var{strip_empty})
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21 ## Split a single string using one or more delimiters and return a cell
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22 ## array of strings. Consecutive delimiters and delimiters at
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23 ## boundaries result in empty strings, unless @var{strip_empty} is true.
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24 ## The default value of @var{strip_empty} is false.
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25 ## @seealso{strtok}
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26 ## @end deftypefn
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27
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28 function s = strsplit (p, sep, strip_empty = false)
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29
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30 if (nargin < 2 || nargin > 3 || ! ischar (p) || rows (p) > 1
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31 || ! ischar (sep) || ! islogical (strip_empty))
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32 print_usage ();
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33 endif
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34
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35 if (isempty (p))
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36 s = cell (size (p));
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37 else
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38 ## Split p according to delimiter.
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39 if (isscalar (sep))
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40 ## Single separator.
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41 idx = find (p == sep);
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42 else
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43 ## Multiple separators.
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44 idx = strchr (p, sep);
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45 endif
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46
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47 ## Get substring sizes.
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48 if (isempty (idx))
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49 sizes = numel (p);
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50 else
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51 sizes = [idx(1)-1, diff(idx)-1, numel(p)-idx(end)];
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52 endif
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53 ## Remove separators.
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54 p(idx) = [];
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55 if (strip_empty)
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56 ## Omit zero lengths.
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57 sizes = sizes (sizes != 0);
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58 endif
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59 ## Convert!
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60 s = mat2cell (p, 1, sizes);
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61 endif
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62
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63 endfunction
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64
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65 %!assert (all (strcmp (strsplit ("road to hell", " "), {"road", "to", "hell"})))
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67 %!assert (all (strcmp (strsplit ("road to^hell", " ^"), {"road", "to", "hell"})))
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69 %!assert (all (strcmp (strsplit ("road to--hell", " -", true), {"road", "to", "hell"})))