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} 12 13# Tests don't have names yet. 14# If you find tests are failing, please try adding names to tests to track 15# down where the failure is, and supply your new names as a patch. 16# (Just-in-time test naming) 17plan tests => 46; 18 19# numerics 20ok ((0xdead & 0xbeef) == 0x9ead); 21ok ((0xdead | 0xbeef) == 0xfeef); 22ok ((0xdead ^ 0xbeef) == 0x6042); 23ok ((~0xdead & 0xbeef) == 0x2042); 24 25# shifts 26ok ((257 << 7) == 32896); 27ok ((33023 >> 7) == 257); 28 29# signed vs. unsigned 30ok ((~0 > 0 && do { use integer; ~0 } == -1)); 31 32my $bits = 0; 33for (my $i = ~0; $i; $i >>= 1) { ++$bits; } 34my $cusp = 1 << ($bits - 1); 35 36 37ok (($cusp & -1) > 0 && do { use integer; $cusp & -1 } < 0); 38ok (($cusp | 1) > 0 && do { use integer; $cusp | 1 } < 0); 39ok (($cusp ^ 1) > 0 && do { use integer; $cusp ^ 1 } < 0); 40ok ((1 << ($bits - 1)) == $cusp && 41 do { use integer; 1 << ($bits - 1) } == -$cusp); 42ok (($cusp >> 1) == ($cusp / 2) && 43 do { use integer; abs($cusp >> 1) } == ($cusp / 2)); 44 45$Aaz = chr(ord("A") & ord("z")); 46$Aoz = chr(ord("A") | ord("z")); 47$Axz = chr(ord("A") ^ ord("z")); 48 49# short strings 50is (("AAAAA" & "zzzzz"), ($Aaz x 5)); 51is (("AAAAA" | "zzzzz"), ($Aoz x 5)); 52is (("AAAAA" ^ "zzzzz"), ($Axz x 5)); 53 54# long strings 55$foo = "A" x 150; 56$bar = "z" x 75; 57$zap = "A" x 75; 58# & truncates 59is (($foo & $bar), ($Aaz x 75 )); 60# | does not truncate 61is (($foo | $bar), ($Aoz x 75 . $zap)); 62# ^ does not truncate 63is (($foo ^ $bar), ($Axz x 75 . $zap)); 64 65# 66is ("ok \xFF\xFF\n" & "ok 19\n", "ok 19\n"); 67is ("ok 20\n" | "ok \0\0\n", "ok 20\n"); 68is ("o\000 \0001\000" ^ "\000k\0002\000\n", "ok 21\n"); 69 70# 71is ("ok \x{FF}\x{FF}\n" & "ok 22\n", "ok 22\n"); 72is ("ok 23\n" | "ok \x{0}\x{0}\n", "ok 23\n"); 73is ("o\x{0} \x{0}4\x{0}" ^ "\x{0}k\x{0}2\x{0}\n", "ok 24\n"); 74 75# 76is (sprintf("%vd", v4095 & v801), 801); 77is (sprintf("%vd", v4095 | v801), 4095); 78is (sprintf("%vd", v4095 ^ v801), 3294); 79 80# 81is (sprintf("%vd", v4095.801.4095 & v801.4095), '801.801'); 82is (sprintf("%vd", v4095.801.4095 | v801.4095), '4095.4095.4095'); 83is (sprintf("%vd", v801.4095 ^ v4095.801.4095), '3294.3294.4095'); 84# 85is (sprintf("%vd", v120.300 & v200.400), '72.256'); 86is (sprintf("%vd", v120.300 | v200.400), '248.444'); 87is (sprintf("%vd", v120.300 ^ v200.400), '176.188'); 88# 89my $a = v120.300; 90my $b = v200.400; 91$a ^= $b; 92is (sprintf("%vd", $a), '176.188'); 93my $a = v120.300; 94my $b = v200.400; 95$a |= $b; 96is (sprintf("%vd", $a), '248.444'); 97 98# 99# UTF8 ~ behaviour 100# 101 102my $Is_EBCDIC = (ord('A') == 193) ? 1 : 0; 103 104my @not36; 105 106for (0x100...0xFFF) { 107 $a = ~(chr $_); 108 if ($Is_EBCDIC) { 109 push @not36, sprintf("%#03X", $_) 110 if $a ne chr(~$_) or length($a) != 1; 111 } 112 else { 113 push @not36, sprintf("%#03X", $_) 114 if $a ne chr(~$_) or length($a) != 1 or ~$a ne chr($_); 115 } 116} 117is (join (', ', @not36), ''); 118 119my @not37; 120 121for my $i (0xEEE...0xF00) { 122 for my $j (0x0..0x120) { 123 $a = ~(chr ($i) . chr $j); 124 if ($Is_EBCDIC) { 125 push @not37, sprintf("%#03X %#03X", $i, $j) 126 if $a ne chr(~$i).chr(~$j) or 127 length($a) != 2; 128 } 129 else { 130 push @not37, sprintf("%#03X %#03X", $i, $j) 131 if $a ne chr(~$i).chr(~$j) or 132 length($a) != 2 or 133 ~$a ne chr($i).chr($j); 134 } 135 } 136} 137is (join (', ', @not37), ''); 138 139SKIP: { 140 skip "EBCDIC" if $Is_EBCDIC; 141 is (~chr(~0), "\0"); 142} 143 144 145my @not39; 146 147for my $i (0x100..0x120) { 148 for my $j (0x100...0x120) { 149 push @not39, sprintf("%#03X %#03X", $i, $j) 150 if ~(chr($i)|chr($j)) ne (~chr($i)&~chr($j)); 151 } 152} 153is (join (', ', @not39), ''); 154 155my @not40; 156 157for my $i (0x100..0x120) { 158 for my $j (0x100...0x120) { 159 push @not40, sprintf("%#03X %#03X", $i, $j) 160 if ~(chr($i)&chr($j)) ne (~chr($i)|~chr($j)); 161 } 162} 163is (join (', ', @not40), ''); 164 165 166# More variations on 19 and 22. 167is ("ok \xFF\x{FF}\n" & "ok 41\n", "ok 41\n"); 168is ("ok \x{FF}\xFF\n" & "ok 42\n", "ok 42\n"); 169 170# Tests to see if you really can do casts negative floats to unsigned properly 171$neg1 = -1.0; 172ok (~ $neg1 == 0); 173$neg7 = -7.0; 174ok (~ $neg7 == 6); 175 176 177$a = "\0\x{100}"; chop($a); 178ok(utf8::is_utf8($a)); # make sure UTF8 flag is still there 179$a = ~$a; 180is($a, "\xFF", "~ works with utf-8"); 181