README.md

Libft

This project is part of the 42 Prague curriculum.
The goal of libft is to reimplement a set of standard C library functions as well as additional utilities.
The result is a custom C library that can be reused in later 42 projects.

📦 Installation & Compilation

1. Clone the repository:
   

git clone git@github.com:ylam21/libft.git libft

cd libft

2. Compile the library:

make

This will produce the libft.a static library.

🧹 Makefile Rules

make – Compile the library

make clean – Remove object files (.o)

make fclean – Remove object files and the compiled library (libft.a)

make re – Recompile everything (equivalent to fclean + make)

🚀 Usage

1. Include the header in your source file:

#include "libft.h"

2. Compile your program with the library:

gcc -Ilibft your_program.c -Llibft -lft -o a.out

-Ilibft tells the compiler where to find libft.h

-Llibft tells the linker where to find libft.a

-lft links the library

📑 Functions

✅ Reimplemented libc functions

• isalpha
• isdigit
• isalnum
• isascii
• isprint
• strlen
• memset
• bzero
• memcpy
• memmove
• strlcpy
• strlcat
• toupper
• tolower
• strchr
• strrchr
• strncmp
• memchr
• memcmp
• strnstr
• atoi
• calloc
• strdup
• ft_substr
• ft_strjoin
• ft_strtrim
• ft_split
• ft_itoa
• ft_strmapi
• ft_striteri
• ft_putchar_fd
• ft_putstr_fd
• ft_putendl_fd
• ft_putnbr_fd

🏗️ Bonus part – Linked list functions

• ft_lstnew
• ft_lstadd_front
• ft_lstsize
• ft_lstlast
• ft_lstadd_back
• ft_lstdelone
• ft_lstclear
• ft_lstiter
• ft_lstmap

📝 Notes

This library will be used as a foundation for future 42 projects.

Functions follow the 42 norminette coding standard.

Each function is prefixed with ft_ to avoid naming conflicts with the standard library.