xref: /openbsd/gnu/usr.bin/perl/t/op/bop.t (revision 404b540a) 
1#!./perl
2
3#
4# test the bit operators '&', '|', '^', '~', '<<', and '>>'
5#
6
7BEGIN {
8    chdir 't' if -d 't';
9    @INC = '../lib';
10    require "./test.pl";
11    require Config;
12}
13
14# Tests don't have names yet.
15# If you find tests are failing, please try adding names to tests to track
16# down where the failure is, and supply your new names as a patch.
17# (Just-in-time test naming)
18plan tests => 161 + (10*13*2) + 4;
19
20# numerics
21ok ((0xdead & 0xbeef) == 0x9ead);
22ok ((0xdead | 0xbeef) == 0xfeef);
23ok ((0xdead ^ 0xbeef) == 0x6042);
24ok ((~0xdead & 0xbeef) == 0x2042);
25
26# shifts
27ok ((257 << 7) == 32896);
28ok ((33023 >> 7) == 257);
29
30# signed vs. unsigned
31ok ((~0 > 0 && do { use integer; ~0 } == -1));
32
33my $bits = 0;
34for (my $i = ~0; $i; $i >>= 1) { ++$bits; }
35my $cusp = 1 << ($bits - 1);
36
37
38ok (($cusp & -1) > 0 && do { use integer; $cusp & -1 } < 0);
39ok (($cusp | 1) > 0 && do { use integer; $cusp | 1 } < 0);
40ok (($cusp ^ 1) > 0 && do { use integer; $cusp ^ 1 } < 0);
41ok ((1 << ($bits - 1)) == $cusp &&
42    do { use integer; 1 << ($bits - 1) } == -$cusp);
43ok (($cusp >> 1) == ($cusp / 2) &&
44    do { use integer; abs($cusp >> 1) } == ($cusp / 2));
45
46$Aaz = chr(ord("A") & ord("z"));
47$Aoz = chr(ord("A") | ord("z"));
48$Axz = chr(ord("A") ^ ord("z"));
49
50# short strings
51is (("AAAAA" & "zzzzz"), ($Aaz x 5));
52is (("AAAAA" | "zzzzz"), ($Aoz x 5));
53is (("AAAAA" ^ "zzzzz"), ($Axz x 5));
54
55# long strings
56$foo = "A" x 150;
57$bar = "z" x 75;
58$zap = "A" x 75;
59# & truncates
60is (($foo & $bar), ($Aaz x 75 ));
61# | does not truncate
62is (($foo | $bar), ($Aoz x 75 . $zap));
63# ^ does not truncate
64is (($foo ^ $bar), ($Axz x 75 . $zap));
65
66#
67is ("ok \xFF\xFF\n" & "ok 19\n", "ok 19\n");
68is ("ok 20\n" | "ok \0\0\n", "ok 20\n");
69is ("o\000 \0001\000" ^ "\000k\0002\000\n", "ok 21\n");
70
71#
72is ("ok \x{FF}\x{FF}\n" & "ok 22\n", "ok 22\n");
73is ("ok 23\n" | "ok \x{0}\x{0}\n", "ok 23\n");
74is ("o\x{0} \x{0}4\x{0}" ^ "\x{0}k\x{0}2\x{0}\n", "ok 24\n");
75
76#
77is (sprintf("%vd", v4095 & v801), 801);
78is (sprintf("%vd", v4095 | v801), 4095);
79is (sprintf("%vd", v4095 ^ v801), 3294);
80
81#
82is (sprintf("%vd", v4095.801.4095 & v801.4095), '801.801');
83is (sprintf("%vd", v4095.801.4095 | v801.4095), '4095.4095.4095');
84is (sprintf("%vd", v801.4095 ^ v4095.801.4095), '3294.3294.4095');
85#
86is (sprintf("%vd", v120.300 & v200.400), '72.256');
87is (sprintf("%vd", v120.300 | v200.400), '248.444');
88is (sprintf("%vd", v120.300 ^ v200.400), '176.188');
89#
90my $a = v120.300;
91my $b = v200.400;
92$a ^= $b;
93is (sprintf("%vd", $a), '176.188');
94my $a = v120.300;
95my $b = v200.400;
96$a |= $b;
97is (sprintf("%vd", $a), '248.444');
98
99#
100# UTF8 ~ behaviour
101#
102
103my $Is_EBCDIC = (ord('A') == 193) ? 1 : 0;
104
105my @not36;
106
107for (0x100...0xFFF) {
108  $a = ~(chr $_);
109  if ($Is_EBCDIC) {
110      push @not36, sprintf("%#03X", $_)
111          if $a ne chr(~$_) or length($a) != 1;
112  }
113  else {
114      push @not36, sprintf("%#03X", $_)
115          if $a ne chr(~$_) or length($a) != 1 or ~$a ne chr($_);
116  }
117}
118is (join (', ', @not36), '');
119
120my @not37;
121
122for my $i (0xEEE...0xF00) {
123  for my $j (0x0..0x120) {
124    $a = ~(chr ($i) . chr $j);
125    if ($Is_EBCDIC) {
126        push @not37, sprintf("%#03X %#03X", $i, $j)
127	    if $a ne chr(~$i).chr(~$j) or
128	       length($a) != 2;
129    }
130    else {
131        push @not37, sprintf("%#03X %#03X", $i, $j)
132	    if $a ne chr(~$i).chr(~$j) or
133	       length($a) != 2 or
134               ~$a ne chr($i).chr($j);
135    }
136  }
137}
138is (join (', ', @not37), '');
139
140SKIP: {
141  skip "EBCDIC" if $Is_EBCDIC;
142  is (~chr(~0), "\0");
143}
144
145
146my @not39;
147
148for my $i (0x100..0x120) {
149    for my $j (0x100...0x120) {
150	push @not39, sprintf("%#03X %#03X", $i, $j)
151	    if ~(chr($i)|chr($j)) ne (~chr($i)&~chr($j));
152    }
153}
154is (join (', ', @not39), '');
155
156my @not40;
157
158for my $i (0x100..0x120) {
159    for my $j (0x100...0x120) {
160	push @not40, sprintf("%#03X %#03X", $i, $j)
161	    if ~(chr($i)&chr($j)) ne (~chr($i)|~chr($j));
162    }
163}
164is (join (', ', @not40), '');
165
166
167# More variations on 19 and 22.
168is ("ok \xFF\x{FF}\n" & "ok 41\n", "ok 41\n");
169is ("ok \x{FF}\xFF\n" & "ok 42\n", "ok 42\n");
170
171# Tests to see if you really can do casts negative floats to unsigned properly
172$neg1 = -1.0;
173ok (~ $neg1 == 0);
174$neg7 = -7.0;
175ok (~ $neg7 == 6);
176
177
178# double magic tests
179
180sub TIESCALAR { bless { value => $_[1], orig => $_[1] } }
181sub STORE { $_[0]{store}++; $_[0]{value} = $_[1] }
182sub FETCH { $_[0]{fetch}++; $_[0]{value} }
183sub stores { tied($_[0])->{value} = tied($_[0])->{orig};
184             delete(tied($_[0])->{store}) || 0 }
185sub fetches { delete(tied($_[0])->{fetch}) || 0 }
186
187# numeric double magic tests
188
189tie $x, "main", 1;
190tie $y, "main", 3;
191
192is(($x | $y), 3);
193is(fetches($x), 1);
194is(fetches($y), 1);
195is(stores($x), 0);
196is(stores($y), 0);
197
198is(($x & $y), 1);
199is(fetches($x), 1);
200is(fetches($y), 1);
201is(stores($x), 0);
202is(stores($y), 0);
203
204is(($x ^ $y), 2);
205is(fetches($x), 1);
206is(fetches($y), 1);
207is(stores($x), 0);
208is(stores($y), 0);
209
210is(($x |= $y), 3);
211is(fetches($x), 2);
212is(fetches($y), 1);
213is(stores($x), 1);
214is(stores($y), 0);
215
216is(($x &= $y), 1);
217is(fetches($x), 2);
218is(fetches($y), 1);
219is(stores($x), 1);
220is(stores($y), 0);
221
222is(($x ^= $y), 2);
223is(fetches($x), 2);
224is(fetches($y), 1);
225is(stores($x), 1);
226is(stores($y), 0);
227
228is(~~$y, 3);
229is(fetches($y), 1);
230is(stores($y), 0);
231
232{ use integer;
233
234is(($x | $y), 3);
235is(fetches($x), 1);
236is(fetches($y), 1);
237is(stores($x), 0);
238is(stores($y), 0);
239
240is(($x & $y), 1);
241is(fetches($x), 1);
242is(fetches($y), 1);
243is(stores($x), 0);
244is(stores($y), 0);
245
246is(($x ^ $y), 2);
247is(fetches($x), 1);
248is(fetches($y), 1);
249is(stores($x), 0);
250is(stores($y), 0);
251
252is(($x |= $y), 3);
253is(fetches($x), 2);
254is(fetches($y), 1);
255is(stores($x), 1);
256is(stores($y), 0);
257
258is(($x &= $y), 1);
259is(fetches($x), 2);
260is(fetches($y), 1);
261is(stores($x), 1);
262is(stores($y), 0);
263
264is(($x ^= $y), 2);
265is(fetches($x), 2);
266is(fetches($y), 1);
267is(stores($x), 1);
268is(stores($y), 0);
269
270is(~$y, -4);
271is(fetches($y), 1);
272is(stores($y), 0);
273
274} # end of use integer;
275
276# stringwise double magic tests
277
278tie $x, "main", "a";
279tie $y, "main", "c";
280
281is(($x | $y), ("a" | "c"));
282is(fetches($x), 1);
283is(fetches($y), 1);
284is(stores($x), 0);
285is(stores($y), 0);
286
287is(($x & $y), ("a" & "c"));
288is(fetches($x), 1);
289is(fetches($y), 1);
290is(stores($x), 0);
291is(stores($y), 0);
292
293is(($x ^ $y), ("a" ^ "c"));
294is(fetches($x), 1);
295is(fetches($y), 1);
296is(stores($x), 0);
297is(stores($y), 0);
298
299is(($x |= $y), ("a" | "c"));
300is(fetches($x), 2);
301is(fetches($y), 1);
302is(stores($x), 1);
303is(stores($y), 0);
304
305is(($x &= $y), ("a" & "c"));
306is(fetches($x), 2);
307is(fetches($y), 1);
308is(stores($x), 1);
309is(stores($y), 0);
310
311is(($x ^= $y), ("a" ^ "c"));
312is(fetches($x), 2);
313is(fetches($y), 1);
314is(stores($x), 1);
315is(stores($y), 0);
316
317is(~~$y, "c");
318is(fetches($y), 1);
319is(stores($y), 0);
320
321$a = "\0\x{100}"; chop($a);
322ok(utf8::is_utf8($a)); # make sure UTF8 flag is still there
323$a = ~$a;
324is($a, "\xFF", "~ works with utf-8");
325
326# [rt.perl.org 33003]
327# This would cause a segfault without malloc wrap
328SKIP: {
329  skip "No malloc wrap checks" unless $Config::Config{usemallocwrap};
330  like( runperl(prog => 'eval q($#a>>=1); print 1'), "^1\n?" );
331}
332
333# [perl #37616] Bug in &= (string) and/or m//
334{
335    $a = "aa";
336    $a &= "a";
337    ok($a =~ /a+$/, 'ASCII "a" is NUL-terminated');
338
339    $b = "bb\x{100}";
340    $b &= "b";
341    ok($b =~ /b+$/, 'Unicode "b" is NUL-terminated');
342}
343
344{
345    $a = chr(0x101) x 0x101;
346    $b = chr(0x0FF) x 0x0FF;
347
348    $c = $a | $b;
349    is($c, chr(0x1FF) x 0xFF . chr(0x101) x 2);
350
351    $c = $b | $a;
352    is($c, chr(0x1FF) x 0xFF . chr(0x101) x 2);
353
354    $c = $a & $b;
355    is($c, chr(0x001) x 0x0FF);
356
357    $c = $b & $a;
358    is($c, chr(0x001) x 0x0FF);
359
360    $c = $a ^ $b;
361    is($c, chr(0x1FE) x 0x0FF . chr(0x101) x 2);
362
363    $c = $b ^ $a;
364    is($c, chr(0x1FE) x 0x0FF . chr(0x101) x 2);
365}
366
367{
368    $a = chr(0x101) x 0x101;
369    $b = chr(0x0FF) x 0x0FF;
370
371    $a |= $b;
372    is($a, chr(0x1FF) x 0xFF . chr(0x101) x 2);
373}
374
375{
376    $a = chr(0x101) x 0x101;
377    $b = chr(0x0FF) x 0x0FF;
378
379    $b |= $a;
380    is($b, chr(0x1FF) x 0xFF . chr(0x101) x 2);
381}
382
383{
384    $a = chr(0x101) x 0x101;
385    $b = chr(0x0FF) x 0x0FF;
386
387    $a &= $b;
388    is($a, chr(0x001) x 0x0FF);
389}
390
391{
392    $a = chr(0x101) x 0x101;
393    $b = chr(0x0FF) x 0x0FF;
394
395    $b &= $a;
396    is($b, chr(0x001) x 0x0FF);
397}
398
399{
400    $a = chr(0x101) x 0x101;
401    $b = chr(0x0FF) x 0x0FF;
402
403    $a ^= $b;
404    is($a, chr(0x1FE) x 0x0FF . chr(0x101) x 2);
405}
406
407{
408    $a = chr(0x101) x 0x101;
409    $b = chr(0x0FF) x 0x0FF;
410
411    $b ^= $a;
412    is($b, chr(0x1FE) x 0x0FF . chr(0x101) x 2);
413}
414
415# update to pp_complement() via Coverity
416SKIP: {
417  # UTF-EBCDIC is limited to 0x7fffffff and can't encode ~0.
418  skip "EBCDIC" if $Is_EBCDIC;
419
420  my $str = "\x{10000}\x{800}";
421  # U+10000 is four bytes in UTF-8/UTF-EBCDIC.
422  # U+0800 is three bytes in UTF-8/UTF-EBCDIC.
423
424  no warnings "utf8";
425  { use bytes; $str =~ s/\C\C\z//; }
426
427  # it's really bogus that (~~malformed) is \0.
428  my $ref = "\x{10000}\0";
429  is(~~$str, $ref);
430}
431
432# ref tests
433
434my %res;
435
436for my $str ("x", "\x{100}") {
437    for my $chr (qw/S A H G X ( * F/) {
438        for my $op (qw/| & ^/) {
439            my $co = ord $chr;
440            my $so = ord $str;
441            $res{"$chr$op$str"} = eval qq/chr($co $op $so)/;
442        }
443    }
444    $res{"undef|$str"} = $str;
445    $res{"undef&$str"} = "";
446    $res{"undef^$str"} = $str;
447}
448
449sub PVBM () { "X" }
450index "foo", PVBM;
451
452my $warn = 0;
453local $^W = 1;
454local $SIG{__WARN__} = sub { $warn++ };
455
456sub is_first {
457    my ($got, $orig, $op, $str, $name) = @_;
458    is(substr($got, 0, 1), $res{"$orig$op$str"}, $name);
459}
460
461for (
462    # [object to test, first char of stringification, name]
463    [undef,             "undef",    "undef"         ],
464    [\1,                "S",        "scalar ref"    ],
465    [[],                "A",        "array ref"     ],
466    [{},                "H",        "hash ref"      ],
467    [qr/x/,             "(",        "qr//"          ],
468    [*foo,              "*",        "glob"          ],
469    [\*foo,             "G",        "glob ref"      ],
470    [PVBM,              "X",        "PVBM"          ],
471    [\PVBM,             "S",        "PVBM ref"      ],
472    [bless([], "Foo"),  "F",        "object"        ],
473) {
474    my ($val, $orig, $type) = @$_;
475
476    for (["x", "string"], ["\x{100}", "utf8"]) {
477        my ($str, $desc) = @$_;
478
479        $warn = 0;
480
481        is_first($val | $str, $orig, "|", $str, "$type | $desc");
482        is_first($val & $str, $orig, "&", $str, "$type & $desc");
483        is_first($val ^ $str, $orig, "^", $str, "$type ^ $desc");
484
485        is_first($str | $val, $orig, "|", $str, "$desc | $type");
486        is_first($str & $val, $orig, "&", $str, "$desc & $type");
487        is_first($str ^ $val, $orig, "^", $str, "$desc ^ $type");
488
489        my $new;
490        ($new = $val) |= $str;
491        is_first($new, $orig, "|", $str, "$type |= $desc");
492        ($new = $val) &= $str;
493        is_first($new, $orig, "&", $str, "$type &= $desc");
494        ($new = $val) ^= $str;
495        is_first($new, $orig, "^", $str, "$type ^= $desc");
496
497        ($new = $str) |= $val;
498        is_first($new, $orig, "|", $str, "$desc |= $type");
499        ($new = $str) &= $val;
500        is_first($new, $orig, "&", $str, "$desc &= $type");
501        ($new = $str) ^= $val;
502        is_first($new, $orig, "^", $str, "$desc ^= $type");
503
504        if ($orig eq "undef") {
505            # undef |= and undef ^= don't warn
506            is($warn, 10, "no duplicate warnings");
507        }
508        else {
509            is($warn, 0, "no warnings");
510        }
511    }
512}
513
514my $strval;
515
516{
517    package Bar;
518    use overload q/""/ => sub { $strval };
519
520    package Baz;
521    use overload q/|/ => sub { "y" };
522}
523
524ok(!eval { bless([], "Bar") | "x"; 1 },     "string overload can't use |");
525like($@, qr/no method found/,               "correct error");
526is(eval { bless([], "Baz") | "x" }, "y",    "| overload works");
527
528my $obj = bless [], "Bar";
529$strval = "x";
530eval { $obj |= "Q" };
531$strval = "z";
532is("$obj", "z", "|= doesn't break string overload");
533