Canonicalize CIDR: Difference between revisions
→String manipulation: Add more examples, streamline code
(→{{header|UNIX Shell}}: Add implementation) |
(→String manipulation: Add more examples, streamline code) |
||
Line 1,310:
{{trans|Perl}}
<lang perl6>#!/usr/bin/env raku
unit sub MAIN(*@cidrs);
# canonicalize a CIDR block: make sure none of the host bits are set▼
# test data
▲if (!@*ARGS) {
@cidrs = «87.70.141.1 36.18.154.103/12 62.62.197.11/29 67.137.119.181/4 161.214.74.21/24 184.232.176.184/18»;
}
for @
say "$cidr -> $(canonicalize $cidr)";
}
▲# canonicalize a CIDR block: make sure none of the host bits are set
sub canonicalize($cidr) {
# dotted-decimal / bits in network part
my ($dotted, $size) = $cidr.split
# get network part of the IP as binary string
my $binary = $dotted.split('.')
#
$binary
# Convert back to dotted-decimal
my $canon = $binary.comb(8)
# And output
Line 1,335 ⟶ 1,340:
{{Out}}
<pre>
36.18.154.103/12 -> 36.16.0.0/12
62.62.197.11/29 -> 62.62.197.8/29
67.137.119.181/4 -> 64.0.0.0/4
161.214.74.21/24 -> 161.214.74.0/24
184.232.176.184/18 -> 184.232.128.0/18</pre>
===Bit mask and shift===
| |||