This project has been created as part of the 42 curriculum by dporhomo.

Libft

💡 About The Project

Libft is the first project of the 42 Core Curriculum. The goal is to create a custom C library named libft.a by rewriting standard C library functions and adding useful utility functions. This library will be used in almost all future 42 projects.

Project Status: ✅ Completed: Mandatory & Bonus Parts.

📂 Function List

Part 1: Libc Functions

Re-implementation of standard C library functions.

Character	String	Memory	Numbers/Other
ft_isalpha	ft_strlen	ft_memset	ft_atoi
ft_isdigit	ft_strlcpy	ft_bzero	ft_calloc
ft_isalnum	ft_strlcat	ft_memcpy	ft_tolower
ft_isascii	ft_strchr	ft_memmove	ft_toupper
ft_isprint	ft_strrchr	ft_memchr
	ft_strncmp	ft_memcmp
	ft_strnstr	ft_strdup

Part 2: Additional Functions

Useful string manipulation functions not present in standard libc.

Function	Description
ft_substr	Allocates and returns a substring from the string 's'.
ft_strjoin	Allocates and returns a new string, result of 's1' + 's2'.
ft_strtrim	Trims characters specified in 'set' from start/end of 's1'.
ft_split	Splits a string using a delimiter and returns an array of strings.
ft_itoa	Converts an integer to a string (char *).
ft_strmapi	Applies a function to each character of a string (creates new string).
ft_striteri	Applies a function to each character of a string (in place).
ft_putchar_fd	Outputs a char to a file descriptor.
ft_putstr_fd	Outputs a string to a file descriptor.
ft_putendl_fd	Outputs a string followed by a newline to a FD.
ft_putnbr_fd	Outputs an integer to a file descriptor.

Part 3: Bonus Functions (Linked Lists)

Functions to manipulate t_list structures.

Function	Description
ft_lstnew	Creates a new list node.
ft_lstadd_front	Adds a node to the beginning of a list.
ft_lstsize	Counts the number of nodes in a list.
ft_lstlast	Returns the last node of the list.
ft_lstadd_back	Adds a node to the end of a list.
ft_lstdelone	Deletes a node and frees its content.
ft_lstclear	Deletes and frees a node and all successors.
ft_lstiter	Applies a function to the content of every node.
ft_lstmap	Applies a function to a list and creates a new list with results.

🛠️ Usage

Requirements

• gcc or clang compiler.
• Standard C libraries.

Compilation

To compile the library, run the following in the root directory:

make # Compiles mandatory functions
make bonus # Compiles mandatory + bonus functions
cc -Wall -Werror -Wextra main.c -L. -lft -lbsd -o test_prog