Mark

This project was completed with a grade of 125/100 ✅ on October 26, 2022.

libft

This project, Libft, is an essential part of the 42 curriculum, where the goal is to learn how fundamental C functions work by re-implementing them from scratch. By creating this custom library, you'll gain a deeper understanding of C programming and enhance your coding skills. Libft includes standard libc functions as well as other utility functions that will be used in future 42 projects. Through this process, you'll develop the knowledge and expertise to write clean, efficient code that you can rely on in your upcoming assignments. The project is designed to be a hands-on learning experience, encouraging trial and error, debugging, and thorough testing to ensure the correctness and efficiency of your functions.

Requirement

In this project, you are allowed to use only three C standard library functions: write(), malloc(), and free(). However, you cannot use them freely; they are only permitted under specific conditions. You need to compress them into a single archive for easy reuse in future projects.

This project is divided into three essential parts:

Libc Functions

These functions already exist in C, so the requirement here is to recreate them to behave in the same way or as close as possible to the original functions from the C standard library.

No	Function Name	Link	No	Function Name	Link
1	ft_memset	ft_memset	13	ft_strnstr	ft_strnstr
2	ft_bzero	ft_bzero	14	ft_strncmp	ft_strncmp
3	ft_memcpy	ft_memcpy	15	ft_atoi	ft_atoi
4	ft_memccpy	ft_memccpy	16	ft_isalpha	ft_isalpha
5	ft_memmove	ft_memmove	17	ft_isdigit	ft_isdigit
6	ft_memchr	ft_memchr	18	ft_isalnum	ft_isalnum
7	ft_memcmp	ft_memcmp	19	ft_isascii	ft_isascii
8	ft_strlen	ft_strlen	20	ft_isprint	ft_isprint
9	ft_strlcpy	ft_strlcpy	21	ft_toupper	ft_toupper
10	ft_strlcat	ft_strlcat	22	ft_tolower	ft_tolower
11	ft_strchr	ft_strchr	23	ft_calloc	ft_calloc
12	ft_strrchr	ft_strrchr	24	ft_strdup	ft_strdup

Additional Functions

These functions do not exist in C (they may exist in other languages), so you need to create them to help you in future C projects. The challenge here is that the functions must not cause segmentation faults or memory leaks under any circumstances.

No	Function Name	Link	No	Function Name	Link
1	ft_substr	ft_substr	6	ft_strmapi	ft_strmapi
2	ft_strjoin	ft_strjoin	7	ft_putchar_fd	ft_putchar_fd
3	ft_strtrim	ft_strtrim	8	ft_putstr_fd	ft_putstr_fd
4	ft_split	ft_split	9	ft_putendl_fd	ft_putendl_fd
5	ft_itoa	ft_itoa	10	ft_putnbr_fd	ft_putnbr_fd

Bonus Functions

This part is not required to validate the project, but it is very important for exploring data structures, specifically singly linked lists. A linked list is a linear data structure where each element, called a node, is connected to the next one using pointers. Through this, you will learn how to create a linked list, delete a node, add a node at the front or back, and delete the entire linked list.

No	Function Name	Link	No	Function Name	Link
1	ft_lstnew	ft_lstnew	6	ft_lstdelone	ft_lstdelone
2	ft_lstadd_front	ft_lstadd_front	7	ft_lstclear	ft_lstclear
3	ft_lstsize	ft_lstsize	8	ft_lstiter	ft_lstiter
4	ft_lstlast	ft_lstlast	9	ft_lstmap	ft_lstmap
5	ft_lstadd_back	ft_lstadd_back