Canonicalize CIDR: Difference between revisions
Add Scala implementation
imported>Thebeez |
(Add Scala implementation) |
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Line 2,019:
println!("{}", canonical_cidr("127.1.2.3/24").unwrap());
}</syntaxhighlight>
=={{header|Scala}}==
{{trans|Java}}
<syntaxhighlight lang="Scala">
import java.text.MessageFormat
object CanonicalizeCIDR extends App {
case class CIDR(address: Int, maskLength: Int) {
override def toString: String = {
val a = (address >> 24) & 0xFF
val b = (address >> 16) & 0xFF
val c = (address >> 8) & 0xFF
val d = address & 0xFF
MessageFormat.format(CIDR.format, a.asInstanceOf[AnyRef], b.asInstanceOf[AnyRef], c.asInstanceOf[AnyRef], d.asInstanceOf[AnyRef], maskLength.asInstanceOf[AnyRef])
}
}
object CIDR {
private val format = "{0,number,integer}.{1,number,integer}.{2,number,integer}.{3,number,integer}/{4,number,integer}"
def apply(str: String): CIDR = {
val args = new MessageFormat(format).parse(str)
val address = args.take(4).foldLeft(0) { (acc, arg) =>
val a = arg.asInstanceOf[Number].intValue()
require(a >= 0 && a <= 255, "Invalid IP address")
(acc << 8) + a
}
val maskLength = args(4).asInstanceOf[Number].intValue()
require(maskLength >= 1 && maskLength <= 32, "Invalid mask length")
val mask = ~((1 << (32 - maskLength)) - 1)
new CIDR(address & mask, maskLength)
}
}
val tests = Array(
"87.70.141.1/22",
"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"
)
tests.foreach { test =>
try {
val cidr = CIDR(test)
println(f"$test%-18s -> $cidr")
} catch {
case ex: Exception => println(s"Error parsing '$test': ${ex.getLocalizedMessage}")
}
}
}
</syntaxhighlight>
{{out}}
<pre>
87.70.141.1/22 -> 87.70.140.0/22
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>
=={{header|SNOBOL}}==
<syntaxhighlight lang="snobol">* Pattern to match any number of digits
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