Mercurial > hg > octave-nkf
annotate scripts/strings/strchr.m @ 14868:5d3a684236b0
maint: Use Octave coding conventions for cuddling parentheses in scripts directory
* lin2mu.m, loadaudio.m, wavread.m, accumarray.m, bicubic.m, celldisp.m,
colon.m, cplxpair.m, dblquad.m, divergence.m, genvarname.m, gradient.m,
int2str.m, interp1.m, interp1q.m, interp2.m, interpn.m, loadobj.m, nthargout.m,
__isequal__.m, __splinen__.m, quadgk.m, quadl.m, quadv.m, rat.m, rot90.m,
rotdim.m, saveobj.m, subsindex.m, triplequad.m, delaunay3.m, griddata.m,
inpolygon.m, tsearchn.m, voronoi.m, get_first_help_sentence.m, which.m,
gray2ind.m, pink.m, dlmwrite.m, strread.m, textread.m, textscan.m, housh.m,
ishermitian.m, issymmetric.m, krylov.m, logm.m, null.m, rref.m,
compare_versions.m, copyfile.m, dump_prefs.m, edit.m, fileparts.m,
getappdata.m, isappdata.m, movefile.m, orderfields.m, parseparams.m,
__xzip__.m, rmappdata.m, setappdata.m, swapbytes.m, unpack.m, ver.m, fminbnd.m,
fminunc.m, fsolve.m, glpk.m, lsqnonneg.m, qp.m, sqp.m, configure_make.m,
copy_files.m, describe.m, get_description.m, get_forge_pkg.m, install.m,
installed_packages.m, is_architecture_dependent.m, load_package_dirs.m,
print_package_description.m, rebuild.m, repackage.m, save_order.m, shell.m,
allchild.m, ancestor.m, area.m, axes.m, axis.m, clabel.m, close.m, colorbar.m,
comet.m, comet3.m, contour.m, cylinder.m, ezmesh.m, ezsurf.m, findobj.m,
fplot.m, hist.m, isocolors.m, isonormals.m, isosurface.m, isprop.m, legend.m,
mesh.m, meshz.m, pareto.m, pcolor.m, peaks.m, plot3.m, plotmatrix.m, plotyy.m,
polar.m, print.m, __add_datasource__.m, __add_default_menu__.m,
__axes_limits__.m, __bar__.m, __clabel__.m, __contour__.m, __errcomm__.m,
__errplot__.m, __ezplot__.m, __file_filter__.m, __fltk_print__.m,
__ghostscript__.m, __gnuplot_print__.m, __go_draw_axes__.m,
__go_draw_figure__.m, __interp_cube__.m, __marching_cube__.m, __patch__.m,
__pie__.m, __plt__.m, __print_parse_opts__.m, __quiver__.m, __scatter__.m,
__stem__.m, __tight_eps_bbox__.m, __uigetdir_fltk__.m, __uigetfile_fltk__.m,
__uiputfile_fltk__.m, quiver.m, quiver3.m, rectangle.m, refreshdata.m,
ribbon.m, scatter.m, semilogy.m, shading.m, slice.m, subplot.m, surface.m,
surfl.m, surfnorm.m, text.m, uigetfile.m, uiputfile.m, whitebg.m, deconv.m,
mkpp.m, pchip.m, polyaffine.m, polyder.m, polygcd.m, polyout.m, polyval.m,
ppint.m, ppjumps.m, ppval.m, residue.m, roots.m, spline.m, splinefit.m,
addpref.m, getpref.m, setpref.m, ismember.m, setxor.m, arch_fit.m, arch_rnd.m,
arch_test.m, autoreg_matrix.m, diffpara.m, fftconv.m, filter2.m, hanning.m,
hurst.m, periodogram.m, triangle_sw.m, sinc.m, spectral_xdf.m, spencer.m,
stft.m, synthesis.m, unwrap.m, yulewalker.m, bicgstab.m, gmres.m, pcg.m, pcr.m,
__sprand_impl__.m, speye.m, spfun.m, sprandn.m, spstats.m, svds.m,
treelayout.m, treeplot.m, bessel.m, factor.m, legendre.m, perms.m, primes.m,
magic.m, toeplitz.m, corr.m, cov.m, mean.m, median.m, mode.m, qqplot.m,
quantile.m, ranks.m, zscore.m, logistic_regression_likelihood.m,
bartlett_test.m, chisquare_test_homogeneity.m, chisquare_test_independence.m,
kolmogorov_smirnov_test.m, run_test.m, u_test.m, wilcoxon_test.m, z_test.m,
z_test_2.m, bin2dec.m, dec2base.m, mat2str.m, strcat.m, strchr.m, strjust.m,
strtok.m, substr.m, untabify.m, assert.m, demo.m, example.m, fail.m, speed.m,
test.m, now.m: Use Octave coding conventions for cuddling parentheses in
scripts directory.
author | Rik <octave@nomad.inbox5.com> |
---|---|
date | Tue, 17 Jul 2012 07:08:39 -0700 |
parents | 72c96de7a403 |
children | d63878346099 |
rev | line source |
---|---|
14138
72c96de7a403
maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
parents:
13320
diff
changeset
|
1 ## Copyright (C) 2008-2012 Jaroslav Hajek |
8552 | 2 ## |
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 | |
7 ## the Free Software Foundation; either version 3 of the License, or (at | |
8 ## your option) any later version. | |
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 | |
16 ## along with Octave; see the file COPYING. If not, see | |
17 ## <http://www.gnu.org/licenses/>. | |
18 | |
19 ## -*- texinfo -*- | |
10793
be55736a0783
Grammarcheck the documentation from m-files.
Rik <octave@nomad.inbox5.com>
parents:
10408
diff
changeset
|
20 ## @deftypefn {Function File} {@var{idx} =} strchr (@var{str}, @var{chars}) |
8552 | 21 ## @deftypefnx {Function File} {@var{idx} =} strchr (@var{str}, @var{chars}, @var{n}) |
8830 | 22 ## @deftypefnx {Function File} {@var{idx} =} strchr (@var{str}, @var{chars}, @var{n}, @var{direction}) |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
23 ## @deftypefnx {Function File} {[@var{i}, @var{j}] =} strchr (@dots{}) |
11261 | 24 ## Search for the string @var{str} for occurrences of characters from |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
25 ## the set @var{chars}. The return value(s), as well as the @var{n} and |
11261 | 26 ## @var{direction} arguments behave identically as in @code{find}. |
8552 | 27 ## |
28 ## This will be faster than using regexp in most cases. | |
29 ## | |
30 ## @seealso{find} | |
8715 | 31 ## @end deftypefn |
8552 | 32 |
33 function varargout = strchr (str, chars, varargin) | |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
34 |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
35 if (nargin < 2) |
8552 | 36 print_usage (); |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
37 elseif (! ischar (str)) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
38 error ("strchr: STR argument must be a string or string array"); |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
39 elseif (! ischar (chars)) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
40 error ("strchr: CHARS argument must be a string"); |
8552 | 41 endif |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
42 |
10408 | 43 if (isempty (chars)) |
44 mask = false (size (str)); | |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
45 elseif (length (chars) <= 4) |
10408 | 46 ## With a few characters, it pays off to build the mask incrementally. |
47 ## We do it via a for loop to save memory. | |
48 mask = str == chars(1); | |
49 for i = 2:length (chars) | |
50 mask |= str == chars(i); | |
51 endfor | |
52 else | |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
53 ## Index the str into a mask of valid values. |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
54 ## This is slower than it could be because of the +1 issue. |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
55 f = false (256, 1); |
14868
5d3a684236b0
maint: Use Octave coding conventions for cuddling parentheses in scripts directory
Rik <octave@nomad.inbox5.com>
parents:
14138
diff
changeset
|
56 f(uint8 (chars) + 1) = true; |
11261 | 57 ## Default goes via double -- unnecessarily long. |
58 si = uint32 (str); | |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
59 ## in-place is faster than str+1 |
11261 | 60 ++si; |
10408 | 61 mask = reshape (f(si), size (str)); |
62 endif | |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
63 |
8552 | 64 varargout = cell (1, nargout); |
65 varargout{1} = []; | |
10408 | 66 [varargout{:}] = find (mask, varargin{:}); |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
67 |
11587
c792872f8942
all script files: untabify and strip trailing whitespace
John W. Eaton <jwe@octave.org>
parents:
11523
diff
changeset
|
68 endfunction |
8552 | 69 |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
70 |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
71 %!assert (strchr ("Octave is the best software", ""), zeros (1,0)) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
72 %!assert (strchr ("Octave is the best software", "best"), [3, 6, 9, 11, 13, 15, 16, 17, 18, 20, 23, 27]) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
73 %!assert (strchr ("Octave is the best software", "software"), [3, 4, 6, 9, 11, 13, 16, 17, 18, 20, 21, 22, 23, 24, 25, 26, 27]) |
11260 | 74 |
13320
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
75 %% Test input validation |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
76 %!error strchr () |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
77 %!error strchr (1) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
78 %!error <STR argument must be a string> strchr (1, "aeiou") |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
79 %!error <CHARS argument must be a string> strchr ("aeiou", 1) |
9da8fbd17b92
strchr.m: Tune switching between algorithms. Add error messages to input validation.
Rik <octave@nomad.inbox5.com>
parents:
12474
diff
changeset
|
80 |