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• Show HN: Whatdoesthiscodedo.com – AI explanations for other people’s code
  4 projects | news.ycombinator.com | 14 Mar 2023

  It's good.

  I fed it the urlparse function from here:

  https://github.com/chbarts/web/blob/master/web.c

  And it came up with this:

  https://whatdoesthiscodedo.com/g/e2a519c

  This is a C function that takes a URL as input and parses it to extract the host, path and port.

  The function starts by initializing variables i and j. Then it checks if the length of the URL is less than 7 characters. If so, it sets i to 0. Otherwise, it checks if the URL starts with "http://" using the strncmp function. If it does start with "http://", then i is set to 7. Otherwise, i is set to 0.

  The next block of code checks if i is 0 and if the URL contains "://". If this condition is true, then the function returns -1 indicating an error.

  The next line sets the host variable to point to the string starting at position i in the URL.

  The following loop iterates over the characters in the URL from position i until it reaches either a forward slash (/), a colon (:), or the end of the string. The switch statement then handles each case separately.

  If the loop finds a forward slash, it replaces it with a null character (\0) and sets port to null, indicating that no port was specified in the URL. It then sets the path variable to point to the string immediately following the null character.

  If the loop finds a colon, it replaces it with a null character and increments i. It then sets port to point to the string starting at position i in the URL. The loop then continues to iterate over the remaining characters in the URL until it reaches a forward slash or the end of the string. If it finds a forward slash, it replaces it with a null character and sets the path variable to point to the string immediately following the null character. Otherwise, it sets path to point to the end of the URL.

  If the loop finds the end of the string, it sets *port to null and sets path to point to the end of the URL.

  Finally, the function returns 0 to indicate success. The host, path, and port variables are passed as pointers, so they will be modified by the function and their values can be accessed outside of the function.