libft

A custom C library developed as part of the 42 school curriculum. This project re‑implements selected standard C library functions, includes additional utilities for string and memory handling, and supports linked list operations.

The goal of the Libft project was to deepen my understanding of pointers, memory management, static libraries, and C coding standards, while building a library I can reuse across future projects.

Technical specification

Language: C (C99/C11)
Standard: POSIX / 42 Norminette
Build System: GNU Make
Memory: Zero-leak policy (Valgrind/Leaks verified)
Compilation flags: -Wall -Werror -Wextra

Modules

Standard C library re-implementation

Core memory and string manipulation utilities:

• Memory Operations: ft_memset, ft_bzero, ft_memcpy, ft_memmove, ft_memchr, ft_memcmp.
• String Manipulation: ft_strlen, ft_strlcpy, ft_strlcat, ft_strchr, ft_strrchr, ft_strnstr, ft_strncmp.
• Type Logic: ft_isalpha, ft_isdigit, ft_isalnum, ft_isascii, ft_isprint, ft_toupper, ft_tolower.

Extended utility functions

String transformation and I/O management:

• Allocation: ft_substr, ft_strjoin, ft_strtrim, ft_split, ft_itoa.
• Functional Programming: ft_strmapi, ft_striteri.
• File Descriptor I/O: ft_putchar_fd, ft_putstr_fd, ft_putendl_fd, ft_putnbr_fd.

Linked list manipulation routines

Using a t_list struct, simplification of linked list usage:

• Operations: ft_lstnew, ft_lstadd_front, ft_lstsize, ft_lstlast, ft_lstadd_back.
• Memory Management: ft_lstdelone, ft_lstclear, ft_lstiter, ft_lstmap.

Build Instruction

The project produces a static library file libft.a.

# Clone the repository
git clone git@github.com:miluns/libft.git
cd libft

# Compile into a static library
make