private static bool TryGetInfo()

in src/PSRule.Rules.Azure/Data/Template/CidrParsing.cs [139:202]
50 lines of code
14 McCabe index (conditional complexity)

    private static bool TryGetInfo(byte[] address, int prefixLength, int subnetOffset, int hostOffset, out ICidrInfo info)
    {
        var numBytes = address.Length;
        var offset = (byte)(numBytes == 4 && prefixLength < 32 ? 1 : 0);

        // Fill in the mask
        var netmask = new byte[numBytes];
        for (var i = 0; i < prefixLength; i++)
        {
            netmask[i / 8] |= (byte)(1 << (7 - (i % 8)));
        }

        // Mask the address to get the address
        var network = new byte[numBytes];
        for (var i = 0; i < numBytes; i++)
        {
            network[i] = (byte)(address[i] & netmask[i]);
        }

        // Calculate the network based on the netmask and offset by subnetOffset
        var networkAddress = new byte[numBytes];
        var carry = subnetOffset << (8 - (prefixLength % 8));
        for (var i = numBytes - (numBytes - prefixLength / 8); i >= 0; i--)
        {
            if (i == numBytes)
                i--;

            networkAddress[i] = (byte)((address[i] & network[i]) + carry);
            carry = (byte)(((address[i] & network[i]) + carry) >> 8);
        }

        // Calculate the first address based on netmask
        var firstAddress = new byte[numBytes];
        for (var i = 0; i < numBytes; i++)
        {
            firstAddress[i] = (byte)(network[i] + ((i == numBytes - 1) ? (offset + hostOffset) : 0));
        }

        // Calculate the broadcast
        var broadcastAddress = new byte[numBytes];
        for (var i = 0; i < numBytes; i++)
        {
            broadcastAddress[i] = (byte)(networkAddress[i] + ((i >= prefixLength / 8) ? 255 - netmask[i] : 0));
        }

        // Calculate the last usable address based on broadcast
        var lastUsableAddress = new byte[numBytes];
        for (var i = 0; i < numBytes; i++)
        {
            lastUsableAddress[i] = (byte)(broadcastAddress[i] - ((i == numBytes - 1) ? offset : 0));
        }

        info = new CidrInfo
        {
            Version = numBytes == 4 ? 4 : 6,
            Network = new CidrIP(networkAddress),
            Netmask = new CidrIP(netmask),
            Broadcast = new CidrIP(broadcastAddress),
            FirstUsable = new CidrIP(firstAddress),
            LastUsable = new CidrIP(lastUsableAddress),
            Cidr = prefixLength,
        };
        return true;
    }