comefrom: <qiyuangong>751_IP_to_CIDR_1.java
code: private long ipToLong(String ip) {
          long ans = 0;
          for (String x: ip.split("\\.")) {
              ans = 256 * ans + Integer.valueOf(x);
          }
          return ans;
      }
masked: private long sample_funcname ( String var_0 ) {
    long var_1 = 0 ;
    for ( String var_2 : var_0 . split ( "\\." ) ) {
      var_1 = 256 * var_1 + Integer . valueOf ( var_2 ) ;
    }
    return var_1 ;
  }
  