1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
|
## Copyright (C) 2006-2013 Bill Denney
##
## 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/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} compare_versions (@var{v1}, @var{v2}, @var{operator})
## Compare two version strings using the given @var{operator}.
##
## This function assumes that versions @var{v1} and @var{v2} are
## arbitrarily long strings made of numeric and period characters
## possibly followed by an arbitrary string (e.g., @qcode{"1.2.3"},
## @qcode{"0.3"}, @qcode{"0.1.2+"}, or @qcode{"1.2.3.4-test1"}).
##
## The version is first split into numeric and character portions
## and then the parts are padded to be the same length (i.e., @qcode{"1.1"}
## would be padded to be @qcode{"1.1.0"} when being compared with
## @qcode{"1.1.1"}, and separately, the character parts of the strings are
## padded with nulls).
##
## The operator can be any logical operator from the set
##
## @itemize @bullet
## @item
## @qcode{"=="}
## equal
##
## @item
## @qcode{"<"}
## less than
##
## @item
## @qcode{"<="}
## less than or equal to
##
## @item
## @qcode{">"}
## greater than
##
## @item
## @qcode{">="}
## greater than or equal to
##
## @item
## @qcode{"!="}
## not equal
##
## @item
## @qcode{"~="}
## not equal
## @end itemize
##
## Note that version @qcode{"1.1-test2"} will compare as greater than
## @qcode{"1.1-test10"}. Also, since the numeric part is compared first,
## @qcode{"a"} compares less than @qcode{"1a"} because the second string
## starts with a numeric part even though @code{double ("a")} is greater than
## @code{double ("1").}
## @end deftypefn
## Author: Bill Denney <denney@seas.upenn.edu>
function out = compare_versions (v1, v2, operator)
if (nargin != 3)
print_usage ();
endif
## Make sure that the version numbers are valid.
if (! (ischar (v1) && ischar (v2)))
error ("compare_versions: both version numbers must be strings");
elseif (rows (v1) != 1 || rows (v2) != 1)
error ("compare_versions: version numbers must be a single row");
endif
## check and make sure that the operator is valid
if (! ischar (operator))
error ("compare_versions: OPERATOR must be a character string");
elseif (numel (operator) > 2)
error ("compare_versions: OPERATOR must be 1 or 2 characters long");
endif
## trim off any character data that is not part of a normal version
## number
numbers = "0123456789.";
v1firstchar = find (! ismember (v1, numbers), 1);
v2firstchar = find (! ismember (v2, numbers), 1);
if (! isempty (v1firstchar))
v1c = v1(v1firstchar:length (v1));
v1nochar = v1(1:v1firstchar-1);
else
v1c = "";
v1nochar = v1;
endif
if (! isempty (v2firstchar))
v2c = v2(v2firstchar:length (v2));
v2nochar = v2(1:v2firstchar-1);
else
v2c = "";
v2nochar = v2;
endif
v1n = str2num (char (ostrsplit (v1nochar, ".")));
v2n = str2num (char (ostrsplit (v2nochar, ".")));
if ((isempty (v1n) && isempty (v1c)) || (isempty (v2n) && isempty (v2c)))
error ("compare_versions: given version strings are not valid: %s %s",
v1, v2);
endif
## Assume that any additional elements would be 0 if one is longer
## than the other.
maxnumlen = max ([length(v1n) length(v2n)]);
if (length (v1n) < maxnumlen)
v1n(length(v1n)+1:maxnumlen) = 0;
endif
if (length (v2n) < maxnumlen)
v2n(length(v2n)+1:maxnumlen) = 0;
endif
## Assume that any additional character elements would be 0 if one is
## longer than the other.
maxcharlen = max ([length(v1c), length(v2c)]);
if (length (v1c) < maxcharlen)
v1c(length(v1c)+1:maxcharlen) = "\0";
endif
if (length (v2c) < maxcharlen)
v2c(length(v2c)+1:maxcharlen) = "\0";
endif
## Determine the operator.
if (any (ismember (operator, "=")))
equal_op = true;
else
equal_op = false;
endif
if (any (ismember (operator, "~!")))
not_op = true;
else
not_op = false;
endif
if (any (ismember (operator, "<")))
lt_op = true;
else
lt_op = false;
endif
if (any (ismember (operator, ">")))
gt_op = true;
else
gt_op = false;
endif
## Make sure that we don't have conflicting operators.
if (gt_op && lt_op)
error ("compare_versions: OPERATOR cannot contain both greater and less than symbols");
elseif ((gt_op || lt_op) && not_op)
error ("compare_versions: OPERATOR cannot contain not and greater than or less than symbols");
elseif (strcmp (operator, "="))
error ("compare_versions: equality OPERATOR is \"==\", not \"=\"");
elseif (! (equal_op || not_op || lt_op || gt_op))
error ("compare_versions: No valid OPERATOR specified");
endif
## Compare the versions (making sure that they're the same shape)
vcmp = v1n(:) - v2n(:);
vcmp = [vcmp; (v1c - v2c)(:)];
if (lt_op)
## so that we only need to check for the output being greater than 1
vcmp = -vcmp;
endif
firstdiff = find (vcmp != 0, 1);
if (isempty (firstdiff))
## They're equal.
out = equal_op;
elseif (lt_op || gt_op)
## They're correctly less than or greater than.
out = (vcmp(firstdiff) > 0);
else
## They're not correctly less than or greater than, and they're not equal.
out = false;
endif
## Reverse the output if not is given.
if (not_op)
out = !out;
endif
endfunction
## tests
## test both equality symbols
## test arbitrarily long equality
%!assert (compare_versions ("1.1.0.0.0", "1.1", "=="), true)
%!assert (compare_versions ("1", "1.1", "<"), true)
%!assert (compare_versions ("1.1", "1.1", "<="), true)
%!assert (compare_versions ("1.1", "1.1.1", "<="), true)
%!assert (compare_versions ("1.23", "1.24", "=<"), true)
## test different length numbers
%!assert (compare_versions ("23.2000", "23.1", ">"), true)
%!assert (compare_versions ("0.0.2", "0.0.1", ">="), true)
%!assert (compare_versions ("0.2", "0.0.100", "=>"), true)
%!assert (compare_versions ("0.1", "0.2", "!="), true)
%!assert (compare_versions ("0.1", "0.2", "~="), true)
## test alphanumeric strings
%!assert (compare_versions ("1a", "1b", "<"), true)
%!assert (compare_versions ("a", "1", "<"), true)
%!assert (compare_versions ("1a", "1b", ">"), false)
%!assert (compare_versions ("a", "1", ">"), false)
%!assert (compare_versions ("1.1.0a", "1.1.0b", "=="), false)
%!assert (compare_versions ("1.1.0a", "1.1.0b", "!="), true)
%!assert (compare_versions ("1.1.0test", "1.1.0b", "=="), false)
%!assert (compare_versions ("1.1.0test", "1.1.0test", "=="), true)
## make sure that it won't just give true output
%!assert (compare_versions ("1", "0", "=="), false)
## test arbitrarily long equality
%!assert (compare_versions ("1.1.1.0.0", "1.1", "=="), false)
%!assert (compare_versions ("1.1", "1", "<"), false)
%!assert (compare_versions ("2", "1.1", "<="), false)
%!assert (compare_versions ("1.1.1", "1.1", "<="), false)
%!assert (compare_versions ("1.25", "1.24", "=<"), false)
## test different length numbers
%!assert (compare_versions ("23.2", "23.100", ">"), false)
%!assert (compare_versions ("0.0.0.2", "0.0.1", ">="), false)
%!assert (compare_versions ("0.0.20", "0.10.2", "=>"), false)
%!assert (compare_versions ("0.1", "0.1", "!="), false)
%!assert (compare_versions ("0.1", "0.1", "~="), false)
%% Test input validation
%!error (compare_versions (0.1, "0.1", "=="))
%!error (compare_versions ("0.1", 0.1, "=="))
%!error (compare_versions (["0";".";"1"], "0.1", "=="))
%!error (compare_versions ("0.1", ["0";".";"1"], "=="))
%!error (compare_versions ("0.1", "0.1", "<>"))
%!error (compare_versions ("0.1", "0.1", "!>"))
%!error (compare_versions ("0.1", "0.1", "="))
%!error (compare_versions ("0.1", "0.1", "aa"))
|
