Once you see the fucking code

Overview

Inspired by @ rana_kualu's article, I'll write about the most dangerous fucking code I've ever seen.

(Original article) -The dirtiest source code I've ever seen-Qiita https://qiita.com/rana_kualu/items/2f3c40642836c11f5ddc

Fucking code

① typedef

Reproduction code.c


typedef void coid;
typedef void boid;

Looking at the keyboard, [** c ] [ v ] [ b **] are lined up. That is, this means that ** typos are covered by redefining the model name **. As expected, I thought that this was ** not a program **.

② Minus 10,000

The variable name is appropriate for the time being.

Reproduction code.php


$date0 = '20201122'; //The character string comes from the screen with YYYYMMDD
$date1 = $date0 -10000;
$year = substr($date1, 0, 4);
$month = substr($date1, 4, 2);
$day   = substr($date1, 6, 2);

What is the process of subtracting 10,000? A colleague (at that time) found this code from a mechanic under maintenance and bothered with him. In date processing, 10,000 is bad. .. .. Fortunately, the person who wrote it was next to me, so I asked him directly.

Calculated one year ago

:thinking::thinking::thinking::thinking::thinking:

: astonished: I see! : rage: Rewrite! : punch_tone2:

Fortunately, the person who wrote it was a friend (classmate) from high school, so I hit him for the time being.

For date manipulation, there is a function for date manipulation, so let's use it. (I mean, I'm a static type field person, so my knees trembled when I used dynamic type conversion.)

③ Octopus panic

Reproduction code.java


boolean checkNumber (str) {
  boolean isNumber = !NumberUtils.isNumber(str);
  if(isNumber) {
    //Error message processing
  }
  return !isNumber;
}

Tsukkomi

The logical value (truth value) is messed up.

Logical values are very confusing, so be careful when handling them. I try to make the positive one true and the negative one false.

④ (Addition) The power of include!

I somehow remembered it when I saw @ fujitanozomu's sample code, so I will add it.

Reproduction code.c


int tbl[] = {
  #include <list.csv>
};

This is how to use it like this. .. .. Rough work because you understand the compilation process! ?? I tought.

Macro culture has become a basic bad law in programming languages. (Although some features remain in later languages)

that's all

I want to devote myself every day so as not to write shit code.

Postscript ① 2020/06/21 (Sun)

I'm scared because the number of views is larger than I expected. The part that is a little horny is private and seems to be a problem, so Some descriptions have been deleted.

Postscript ② 2020/06/21 (Sun)

④ was added. I just remembered it (bitter smile)

Postscript ③ 2020/06/22 (Sun)

I received information from @sakuro. There seems to be a file format that was originally supposed to be included. ・ XPM-Wikipedia https://ja.wikipedia.org/wiki/XPM XPM itself seems to be the body of the C language source code.

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