Mercurial > octave-nkf
view scripts/general/private/__isequal__.m @ 17338:1c89599167a6
maint: End m-files with 1 blank line.
Simplifies automated grammarchecking script.
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scripts/ui/private/message_dialog.m: End m-files with 1 blank line.
author | Rik <rik@octave.org> |
---|---|
date | Wed, 28 Aug 2013 08:33:02 -0700 |
parents | f519560bfcb4 |
children | d63878346099 |
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## Copyright (C) 2000-2012 Paul Kienzle ## ## This file is part of Octave. ## ## Octave is free software; you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation; either version 3 of the License, or (at ## your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ## General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <http://www.gnu.org/licenses/>. ## Undocumented internal function. ## -*- texinfo -*- ## @deftypefn {Function File} {} __isequal__ (@var{nans_compare_equal}, @var{x1}, @var{x2}, @dots{}) ## Undocumented internal function. ## @end deftypefn ## Return true if @var{x1}, @var{x2}, @dots{} are all equal and ## @var{nans_compare_equal} evaluates to false. ## ## If @var{nans_compare_equal} evaluates to true, then assume NaN == NaN. ## Modified by: William Poetra Yoga Hadisoeseno ## Algorithm: ## ## 1. Determine the class of x ## 2. If x is of the struct, cell, list or char class, for each ## argument after x, determine whether it has the same class ## and size as x. ## Otherwise, for each argument after x, verify that it is not ## of the struct, cell, list or char class, and that it has ## the same size as x. ## 3. For each argument after x, compare it for equality with x: ## a. struct compare each member by name, not by order (recursive) ## b. cell/list compare each member by order (recursive) ## c. char compare each member with strcmp ## d. <other> compare each nonzero member, and assume NaN == NaN ## if nans_compare_equal is nonzero. function t = __isequal__ (nans_compare_equal, x, varargin) l_v = nargin - 2; ## Generic tests. ## All arguments must either be of the same class or they must be ## numeric values. t = (all (strcmp (class (x), cellfun ("class", varargin, "uniformoutput", false))) || ((isnumeric (x) || islogical (x)) && all (cellfun ("isnumeric", varargin) | cellfun ("islogical", varargin)))); if (t) ## Test that everything has the same number of dimensions. s_x = size (x); s_v = cellfun (@size, varargin, "uniformoutput", false); t = all (length (s_x) == cellfun ("length", s_v)); endif if (t) ## Test that everything is the same size since it has the same ## dimensionality. l_x = length (s_x); s_v = reshape ([s_v{:}], length (s_x), []); idx = 0; while (t && idx < l_x) idx++; t = all (s_x(idx) == s_v(idx,:)); endwhile endif ## From here on, compare objects as if they were structures. if (isobject (x)) x = builtin ("struct", x); varargin = cellfun (@(x) builtin ("struct", x), varargin, "uniformoutput", false); endif if (t) ## Check individual classes. if (isstruct (x)) ## Test the number of fields. fn_x = fieldnames (x); l_fn_x = length (fn_x); fn_v = cellfun ("fieldnames", varargin, "uniformoutput", false); t = all (l_fn_x == cellfun ("length", fn_v)); ## Test that all the names are equal. idx = 0; s_fn_x = sort (fn_x); while (t && idx < l_v) idx++; ## We'll allow the fieldnames to be in a different order. t = all (strcmp (s_fn_x, sort (fn_v{idx}))); endwhile idx = 0; while (t && idx < l_fn_x) ## Test that all field values are equal. idx++; args = {nans_compare_equal, {x.(fn_x{idx})}}; for argn = 1:l_v args{argn+2} = {varargin{argn}.(fn_x{idx})}; endfor ## Minimize function calls by calling for all the arguments at ## once. t = __isequal__ (args{:}); endwhile elseif (iscell (x)) ## Check that each element of a cell is equal. l_x = numel (x); idx = 0; while (t && idx < l_x) idx++; args = {nans_compare_equal, x{idx}}; for p = 1:l_v args{p+2} = varargin{p}{idx}; endfor t = __isequal__ (args{:}); endwhile elseif (ischar (x)) ## Sizes are equal already, so we can just make everything into a ## row and test the rows. for i = 1:l_v strings{i} = reshape (varargin{i}, 1, []); endfor t = all (strcmp (reshape (x, 1, []), strings)); elseif (isa (x, "function_handle")) ## The == operator is overloaded for handles. t = all (cellfun ("eq", {x}, varargin)); else ## Check the numeric types. f_x = find (x); l_f_x = length (f_x); x = x(f_x); for argn = 1:l_v y = varargin{argn}; f_y = find (y); t = (l_f_x == length (f_y)) && all (f_x == f_y); if (!t) break; endif y = y(f_y); m = (x == y); t = all (m); if (!t && nans_compare_equal) t = isnan (x(!m)) && isnan (y(!m)); endif if (!t) break; endif endfor endif endif if (!t) t = false; else t = true; endif endfunction