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1 | #!./perl |
2 | |
3 | # |
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4 | # test the bit operators '&', '|', '^', '~', '<<', and '>>' |
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5 | # |
6 | |
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7 | BEGIN { |
8 | chdir 't' if -d 't'; |
9 | @INC = '../lib'; |
10 | } |
11 | |
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12 | print "1..18\n"; |
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13 | |
14 | # numerics |
15 | print ((0xdead & 0xbeef) == 0x9ead ? "ok 1\n" : "not ok 1\n"); |
16 | print ((0xdead | 0xbeef) == 0xfeef ? "ok 2\n" : "not ok 2\n"); |
17 | print ((0xdead ^ 0xbeef) == 0x6042 ? "ok 3\n" : "not ok 3\n"); |
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18 | print ((~0xdead & 0xbeef) == 0x2042 ? "ok 4\n" : "not ok 4\n"); |
19 | |
20 | # shifts |
21 | print ((257 << 7) == 32896 ? "ok 5\n" : "not ok 5\n"); |
22 | print ((33023 >> 7) == 257 ? "ok 6\n" : "not ok 6\n"); |
23 | |
24 | # signed vs. unsigned |
25 | print ((~0 > 0 && do { use integer; ~0 } == -1) |
26 | ? "ok 7\n" : "not ok 7\n"); |
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27 | |
28 | my $bits = 0; |
29 | for (my $i = ~0; $i; $i >>= 1) { ++$bits; } |
30 | my $cusp = 1 << ($bits - 1); |
31 | |
32 | print ((($cusp & -1) > 0 && do { use integer; $cusp & -1 } < 0) |
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33 | ? "ok 8\n" : "not ok 8\n"); |
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34 | print ((($cusp | 1) > 0 && do { use integer; $cusp | 1 } < 0) |
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35 | ? "ok 9\n" : "not ok 9\n"); |
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36 | print ((($cusp ^ 1) > 0 && do { use integer; $cusp ^ 1 } < 0) |
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37 | ? "ok 10\n" : "not ok 10\n"); |
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38 | print (((1 << ($bits - 1)) == $cusp && |
39 | do { use integer; 1 << ($bits - 1) } == -$cusp) |
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40 | ? "ok 11\n" : "not ok 11\n"); |
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41 | print ((($cusp >> 1) == ($cusp / 2) && |
42 | do { use integer; $cusp >> 1 } == -($cusp / 2)) |
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43 | ? "ok 12\n" : "not ok 12\n"); |
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44 | |
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45 | $Aaz = chr(ord("A") & ord("z")); |
46 | $Aoz = chr(ord("A") | ord("z")); |
47 | $Axz = chr(ord("A") ^ ord("z")); |
48 | |
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49 | # short strings |
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50 | print (("AAAAA" & "zzzzz") eq ($Aaz x 5) ? "ok 13\n" : "not ok 13\n"); |
51 | print (("AAAAA" | "zzzzz") eq ($Aoz x 5) ? "ok 14\n" : "not ok 14\n"); |
52 | print (("AAAAA" ^ "zzzzz") eq ($Axz x 5) ? "ok 15\n" : "not ok 15\n"); |
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53 | |
54 | # long strings |
55 | $foo = "A" x 150; |
56 | $bar = "z" x 75; |
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57 | $zap = "A" x 75; |
58 | # & truncates |
59 | print (($foo & $bar) eq ($Aaz x 75 ) ? "ok 16\n" : "not ok 16\n"); |
60 | # | does not truncate |
61 | print (($foo | $bar) eq ($Aoz x 75 . $zap) ? "ok 17\n" : "not ok 17\n"); |
62 | # ^ does not truncate |
63 | print (($foo ^ $bar) eq ($Axz x 75 . $zap) ? "ok 18\n" : "not ok 18\n"); |
64 | |