b938e043ca
rand() in Perl can vary between platforms, so don't use it. Instead, remove a completely pointless level of indirection (it introduced a permutation which cancelled itself out) and provide a canned set of random numbers for the rest. This guarantees we will always use the same numbers.
42 lines
798 B
Perl
Executable file
42 lines
798 B
Perl
Executable file
#!/usr/bin/perl
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#
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# Generate a list of rotation vectors so we always use the same set.
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# This needs to be run on a platform with /dev/urandom.
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#
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($n) = @ARGV;
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sysopen(UR, '/dev/urandom', O_RDONLY) or die;
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$maxlen = 78;
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print "\@random_sv_vectors = (\n";
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$outl = ' ';
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for ($i = 0; $i < $n; $i++) {
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do {
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die if (sysread(UR, $x4, 4) != 4);
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@n = unpack("C*", $x4);
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$n[0] &= 31;
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$n[1] &= 31;
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$n[2] &= 31;
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$n[3] &= 31;
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} while ($n[0] == 0 || $n[1] == 0 || $n[2] == 0 || $n[3] == 0 ||
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$n[0] == $n[3] || $n[1] == $n[2]);
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$xl = sprintf(" [%d,%d,%d,%d]%s",
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$n[0], $n[1], $n[2], $n[3],
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($i == $n-1) ? '' : ',');
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if (length($outl.$xl) > $maxlen) {
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print $outl, "\n";
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$outl = ' ';
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}
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$outl .= $xl;
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}
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close(UR);
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print $outl, "\n";
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print ");\n";
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print "1;\n";
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