Question

我想将mac地址更改为浮点数。

我尝试在线使用IEEE 754转换器，但它说＆＃34;值超出了范围＆＃34;。

我怎样才能以正确的方式做到这一点？

Answer 1

# ORIGINAL VIA PERLMONKS
sub mac_hex2num {
  my $mac_hex = shift;

  $mac_hex =~ s/://g;

  $mac_hex = substr(('0'x12).$mac_hex, -12);
  my @mac_bytes = unpack("A2"x6, $mac_hex);

  my $mac_num = 0;
  foreach (@mac_bytes) {
    $mac_num = $mac_num * (2**8) + hex($_);
  }

  return $mac_num;
}


sub mac_num2hex {
  my $mac_num = shift;

  my @mac_bytes;
  for (1..6) {
    unshift(@mac_bytes, sprintf("%02x", $mac_num % (2**8)));
    $mac_num = int($mac_num / (2**8));
  }

  return join(':', @mac_bytes);
}


chomp(my $inmac = shift @ARGV);
my $mac = mac_hex2num($inmac);
print "$inmac converted to a decimal: $mac\n";
my $outmac = mac_num2hex($mac);
print "$mac converted to hex: $outmac\n";

测试：

$ perl mac2num 00:00:DE:AD:BE:EF
00:00:DE:AD:BE:EF converted to a decimal: 3735928559
3735928559 converted to hex: 00:00:de:ad:be:ef

如何将mac地址转换为浮动值？

1 个答案: