ip2long, long2ip

#define IP_MAXLEN 15

stock ipcmp(ip1, ip2, mask= 0xffffffff) return ip1&mask == ip2&mask;

stock ip2long(ip[])
{
  new res= 0x00000000, oct= 0;
  for(new idx= 0, val= 0, len= strlen(ip); oct < 4 && idx < len; oct++, idx++, val= 0)
  {
    for(new i= idx, j= 2; i < len-1; i++)
    {
      if (i-idx >= j) return 0x00000000;
      else if ('0' <= ip[i] <= '9') idx++;
      else if (ip[i] == '*') { j= 1; val= 255; break; }
      else if (ip[i] == '.') { idx= i; break; }
      else return 0x00000000;
    }
    if (ip[idx] == '.' && (idx == 0 || ip[--idx] == '.')) return 0x00000000;
    if (ip[idx] != '*') for(new i= idx, exp= 1; i >= 0 && ip[i] != '.'; i--)
    {
      if (!('0' <= ip[i] <= '9') || idx-i > 2) return 0x00000000;
      val += (ip[i]-'0')*exp; exp *= 10;
      if (val > 255) return 0x00000000;
    }
    res <<= 8; res += val; idx++;
  }

  if (oct < 4) return 0x00000000
  else return res << ((4-oct)*8);
}

stock long2ip(ip, mask= 0xffffffff, bool: wildcards= false)
{
  new res[IP_MAXLEN+1];
  for(new ip2= ip&mask, idx= 0, i= 0, oct= 1; oct <= 4; ip2 <<= 8, idx++, i= 0, oct++)
  {
    new str[3+1];
    for(new val= ip2 >>> 24; val > 0 || i == 0; i++)
    {
      if (wildcards && val == 0x00) { str[i++]= '*'; break; }
      else { str[i]= (val%10)+'0'; val /= 10; }
    }
    for(--i; i >= 0 && idx < IP_MAXLEN; i--) res[idx++]= str[i];
    if (oct < 4 && idx < IP_MAXLEN) res[idx]= '.';
  }

  return res;
}