fraqioui/libft

libft

This project is about coding a C library.

Look for the project's subject between repository files.

Part 1 - libc functions

This part is about Implementing the same behaviors as the original functions using their manual as a reference.

• isalpha           • toupper   
• isdigit           • tolower
• isalnum           • strchr
• isascii           • strrchr
• isprint           • strncmp
• strlen            • memchr
• memset            • memcmp
• bzero             • strnstr
• memcpy            • atoi
• memmove 
• strlcpy           
• strlcat           

In order to implement the two following functions, you will use malloc():

• calloc
• strdup

Part 2 - Additional functions

In this second part, you must develop a set of functions that are either not in the libc, or that are part of it but in a different form.

Function name	Description
ft_substr	Allocates (with malloc(3)) and returns a substring from the string ’s’. The substring begins at index ’start’ and is of maximum size ’len’.
ft_strjoin	Allocates (with malloc(3)) and returns a new string, which is the result of the concatenation of ’s1’ and ’s2’.
ft_strtrim	Allocates (with malloc(3)) and returns a copy of ’s1’ with the characters specified in ’set’ removed from the beginning and the end of the string.
ft_split	Allocates (with malloc(3)) and returns an array of strings obtained by splitting ’s’ using the character ’c’ as a delimiter. The array must end with a NULL pointer.
ft_itoa	Allocates (with malloc(3)) and returns a string representing the integer received as an argument. Negative numbers must be handled.
ft_strmapi	Applies the function ’f’ to each character of the string ’s’, and passing its index as first argument to create a new string (with malloc(3)) resulting from successive applications of ’f’.
ft_striteri	Applies the function ’f’ on each character of the string passed as argument, passing its index as first argument. Each character is passed by address to ’f’ to be modified if necessary.
ft_putchar_fd	Outputs the character ’c’ to the given file descriptor.
ft_putstr_fd	Outputs the string ’s’ to the given file descriptor.
ft_putendl_fd	Outputs the string ’s’ to the given file descriptor followed by a newline.
ft_putnbr_fd	Outputs the integer ’n’ to the given file descriptor.

Bonus Part

Working with singly linked lists.

Function name	Description
ft_lstnew	Allocates (with malloc(3)) and returns a new node. The member variable ’content’ is initialized with the value of the parameter ’content’. The variable ’next’ is initialized to NULL.
ft_lstadd_front	Adds the node ’new’ at the beginning of the list.
ft_lstsize	Counts the number of nodes in a list.
ft_lstlast	Returns the last node of the list.
ft_lstadd_back	Adds the node ’new’ at the end of the list.
ft_lstdelone	Takes as a parameter a node and frees the memory of the node’s content using the function ’del’ given as a parameter and free the node. The memory of ’next’ must not be freed.
ft_lstclear	Deletes and frees the given node and every successor of that node, using the function ’del’ and free(3). Finally, the pointer to the list must be set to NULL.
ft_lstiter	Iterates the list ’lst’ and applies the function ’f’ on the content of each node.
ft_lstmap	Iterates the list ’lst’ and applies the function ’f’ on the content of each node. Creates a new list resulting of the successive applications of the function ’f’. The ’del’ function is used to delete the content of a node if needed.

Resources

• Neso Academy

These books are going to help you a lot to dive deeper into every programming concept in C and understand each aspect of it.

• BOOK_01: An Introduction to the C Programming Language and Software Design. (look for it between repository files)
• BOOK_02: The ANSI C programming language by Brian & Dennis.
• BOOK_03: Extreme C: Taking you to the limit in Concurrency, OOP, and the most advanced capabilities of C by Karman Amini.
• BOOK_04: Practical C Programming: Solutions for modern C developers to create efficient and well-structured programs by B. M. Harwani
• BOOK_05: Grokking Algorithms: An Illustrated Guide for Programmers and Other Curious People by Aditya Bhargava .
• BOOK_06: Hacking: The Art of Exploitation, 2nd Edition by Jon Erickson