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 => 49; 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 (~ $neg7 == 6); 176 177 178$a = "\0\x{100}"; chop($a); 179ok(utf8::is_utf8($a)); # make sure UTF8 flag is still there 180$a = ~$a; 181is($a, "\xFF", "~ works with utf-8"); 182 183# [rt.perl.org 33003] 184# This would cause a segfault without malloc wrap 185SKIP: { 186 skip "No malloc wrap checks" unless $Config::Config{usemallocwrap}; 187 like( runperl(prog => 'eval q($#a>>=1); print 1'), "^1\n?" ); 188} 189 190# [perl #37616] Bug in &= (string) and/or m// 191{ 192 $a = "aa"; 193 $a &= "a"; 194 ok($a =~ /a+$/, 'ASCII "a" is NUL-terminated'); 195 196 $b = "bb\x{100}"; 197 $b &= "b"; 198 ok($b =~ /b+$/, 'Unicode "b" is NUL-terminated'); 199} 200