Mercurial > hg > octave-lyh
annotate scripts/strings/split.m @ 8442:502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
| author | Thorsten Meyer <thorsten.meyier@gmx.de> |
|---|---|
| date | Mon, 05 Jan 2009 08:11:03 +0100 |
| parents | dadf478ddc42 |
| children |
| rev | line source |
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| 7017 | 1 ## Copyright (C) 1996, 1999, 2000, 2005, 2006, 2007 Kurt Hornik |
| 2325 | 2 ## |
| 2313 | 3 ## This file is part of Octave. |
| 4 ## | |
| 5 ## Octave is free software; you can redistribute it and/or modify it | |
| 6 ## under the terms of the GNU General Public License as published by | |
| 7016 | 7 ## the Free Software Foundation; either version 3 of the License, or (at |
| 8 ## your option) any later version. | |
| 2313 | 9 ## |
| 10 ## Octave is distributed in the hope that it will be useful, but | |
| 11 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 ## General Public License for more details. | |
| 14 ## | |
| 15 ## You should have received a copy of the GNU General Public License | |
| 7016 | 16 ## along with Octave; see the file COPYING. If not, see |
| 17 ## <http://www.gnu.org/licenses/>. | |
| 2274 | 18 |
| 3361 | 19 ## -*- texinfo -*- |
| 5462 | 20 ## @deftypefn {Function File} {} split (@var{s}, @var{t}, @var{n}) |
| 3361 | 21 ## Divides the string @var{s} into pieces separated by @var{t}, returning |
| 22 ## the result in a string array (padded with blanks to form a valid | |
| 5462 | 23 ## matrix). If the optional input @var{n} is supplied, split @var{s} |
| 24 ## into at most @var{n} different pieces. | |
| 25 ## | |
| 26 ## For example, | |
| 3426 | 27 ## |
| 3361 | 28 ## @example |
| 29 ## split ("Test string", "t") | |
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8442
502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
diff
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30 ## @result{} |
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502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
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31 ## "Tes " |
| 3361 | 32 ## " s " |
| 33 ## "ring" | |
| 34 ## @end example | |
| 5462 | 35 ## |
| 36 ## @example | |
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8442
502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
diff
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37 ## split ("Test string", "t s", 2) |
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502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
diff
changeset
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38 ## @result{} |
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502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
diff
changeset
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39 ## "Tes " |
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502e58a0d44f
Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
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40 ## "tring" |
| 5462 | 41 ## @end example |
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Fix docstrings, add examples, references and tests to string functions
Thorsten Meyer <thorsten.meyier@gmx.de>
parents:
8168
diff
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42 ## @seealso{strtok, index} |
| 3361 | 43 ## @end deftypefn |
| 2311 | 44 |
| 5428 | 45 ## Author: Kurt Hornik <Kurt.Hornik@wu-wien.ac.at> |
| 2355 | 46 ## Adapted-By: jwe |
| 2314 | 47 |
| 5462 | 48 function m = split (s, t, n) |
| 2325 | 49 |
| 5462 | 50 if (nargin == 2 || nargin == 3) |
| 51 if (nargin == 2) | |
| 52 n = length (s); | |
| 53 endif | |
| 54 | |
| 5443 | 55 if (ischar (s) && ischar (t)) |
| 5219 | 56 |
| 57 l_s = length (s); | |
| 58 l_t = length (t); | |
| 59 | |
| 60 if (l_s == 0) | |
| 61 m = ""; | |
| 62 return; | |
| 63 elseif (l_t == 0) | |
| 64 m = s'; | |
| 65 return; | |
| 66 elseif (l_s < l_t) | |
| 67 error ("split: s must not be shorter than t"); | |
| 68 endif | |
| 69 | |
| 70 if (min (size (s)) != 1 || min (size (t)) != 1) | |
| 71 error("split: multi-line strings are not supported"); | |
| 72 endif | |
| 73 | |
| 74 ind = findstr (s, t, 0); | |
| 75 if (length (ind) == 0) | |
| 76 m = s; | |
| 77 return; | |
| 5462 | 78 elseif (n - 1 < length(ind)) |
| 5473 | 79 ind = ind(1:n-1); |
| 5219 | 80 endif |
| 81 ind2 = [1, ind+l_t]; | |
| 82 ind = [ind, l_s+1]; | |
| 83 | |
| 84 ind_diff = ind-ind2; | |
| 85 | |
| 86 ## Create a matrix of the correct size that's filled with spaces. | |
| 87 m_rows = length (ind); | |
| 88 m_cols = max (ind_diff); | |
| 89 m = repmat (" ", m_rows, m_cols); | |
| 90 | |
| 91 ## Copy the strings to the matrix. | |
| 92 for i = 1:length (ind) | |
| 93 tmp = ind2(i):(ind(i)-1); | |
| 94 m(i,1:length(tmp)) = s(tmp); | |
| 95 endfor | |
| 96 else | |
| 97 error ("split: both s and t must be strings"); | |
| 98 endif | |
| 99 else | |
| 6046 | 100 print_usage (); |
| 2274 | 101 endif |
| 2325 | 102 |
| 2274 | 103 endfunction |
| 7411 | 104 |
| 105 %!assert(all (all (split ("Test string", "t") == ["Tes "; " s "; "ring"]))); | |
| 106 | |
| 107 %!error split (); | |
| 108 | |
| 109 %!assert(all (strcmp (split ("foo bar baz", " ", 2), ["foo"; "bar baz"]))); | |
| 110 | |
| 111 %!error split ("foo", "bar", 3, 4); | |
| 112 | |
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113 %!assert (all (strcmp (split("road//to/hell","/"), ["road"; " "; "to "; "hell"]))) |
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114 |
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115 %!assert (all (strcmp (split("/road/to/hell/","/"), [" "; "road"; "to "; "hell"; " "]))) |
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Jaroslav Hajek <highegg@gmail.com>
parents:
7411
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116 |
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parents:
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117 |