Libft is a custom C library that reimplements standard C library functions. This project serves as the foundation for all subsequent projects in the 42 curriculum, providing essential utility functions for string manipulation, memory management, linked list operations, and more.

• String Functions: Complete string manipulation library (strlen, strcpy, strdup, etc.)
• Memory Functions: Memory allocation and manipulation (malloc, memcpy, memset, etc.)
• Character Functions: Character classification and conversion (isalpha, isdigit, tolower, etc.)
• Conversion Functions: String to number conversion (atoi, itoa)
• Linked List Functions: Complete linked list implementation with bonus functions
• File Descriptor Functions: Output functions for different file descriptors

Libft/
├── libft.h          # Header file with all function declarations
├── Makefile         # Build configuration
├── ft_*.c          # Implementation files for each function
└── .git/           # Git repository

• Memory: ft_memset, ft_memcpy, ft_memmove, ft_memchr, ft_memcmp, ft_bzero, ft_calloc
• String: ft_strlen, ft_strlcpy, ft_strlcat, ft_strchr, ft_strrchr, ft_strnstr, ft_strncmp, ft_strdup
• String Manipulation: ft_substr, ft_strjoin, ft_strtrim, ft_split, ft_strmapi, ft_striteri
• Character: ft_isalpha, ft_isdigit, ft_isalnum, ft_isascii, ft_isprint, ft_toupper, ft_tolower
• Conversion: ft_atoi, ft_itoa
• Output: ft_putchar_fd, ft_putstr_fd, ft_putendl_fd, ft_putnbr_fd

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

After building, the library creates libft.a which can be linked with other projects:

gcc -o my_program my_program.c -L. -lft

• GCC compiler
• Make utility
• Standard C libraries

• All functions follow the 42 coding style (norminette)
• Functions are designed to be memory-safe and handle edge cases
• The library serves as a dependency for many other 42 projects
• Functions are optimized for performance and readability

shmohamm - 42 Abu Dhabi