42 Libft

📚 About

Libft is the first project at 42 School that requires students to re-code several functions from the standard C library. The goal is to create a personal library with basic utility functions that will be used in future projects.

This library contains recoded standard C functions, additional useful functions for string manipulation, memory management, linked list operations, and more.

🔧 Functions

🔤 Libc Functions

Recreated functions from the standard C library:

Function	Description
ft_isalpha	Check if character is alphabetic
ft_isdigit	Check if character is a digit
ft_isalnum	Check if character is alphanumeric
ft_isascii	Check if character is in ASCII table
ft_isprint	Check if character is printable
ft_strlen	Calculate length of string
ft_memset	Fill memory with a constant byte
ft_bzero	Zero a byte string
ft_memcpy	Copy memory area
ft_memmove	Copy memory area with overlap handling
ft_strlcpy	Size-bounded string copy
ft_strlcat	Size-bounded string concatenation
ft_toupper	Convert lowercase letter to uppercase
ft_tolower	Convert uppercase letter to lowercase
ft_strchr	Locate character in string
ft_strrchr	Locate character in string from the end
ft_strncmp	Compare two strings
ft_memchr	Scan memory for a character
ft_memcmp	Compare memory areas
ft_strnstr	Locate a substring in a string
ft_atoi	Convert string to integer
ft_calloc	Allocate and zero-initialize array
ft_strdup	Create a duplicate of a string

➕ Additional Functions

Additional useful functions:

Function	Description
ft_substr	Extract substring from string
ft_strjoin	Concatenate two strings
ft_strtrim	Trim beginning and end of string
ft_split	Split string using a delimiter
ft_itoa	Convert integer to string
ft_strmapi	Apply function to each character with index
ft_striteri	Apply function to each character with index
ft_putchar_fd	Output a character to a file descriptor
ft_putstr_fd	Output a string to a file descriptor
ft_putendl_fd	Output a string with newline to a file descriptor
ft_putnbr_fd	Output a number to a file descriptor

🔗 Bonus: Linked List Functions

Functions for linked list manipulation:

Function	Description
ft_lstnew	Create new list element
ft_lstadd_front	Add element at beginning of list
ft_lstsize	Count elements in a list
ft_lstlast	Get last element of list
ft_lstadd_back	Add element at end of list
ft_lstdelone	Delete element from list
ft_lstclear	Delete and free list
ft_lstiter	Apply function to each element of list
ft_lstmap	Apply function and create new list

🚀 Getting Started

Prerequisites

• GCC compiler
• Make

Installation

Clone this repository:

git clone https://github.com/Tanathorn-Rin/42-Libft.git
cd 42-Libft

Compile the library:

make

For bonus functions:

make bonus

Usage

Include the header in your C files:

#include "libft.h"

Compile your program with the library:

gcc -Wall -Wextra -Werror your_program.c -L. -lft -o your_program

📋 Testing

To test the functions, you can use the following testers (not included in this repository):

• Libft War Machine
• Libft Unit Test
• Libftest

📜 42 School

42 is a global education initiative that offers a new way of learning technology: no teachers, no classrooms, students learning from their fellow students (peer to peer learning), with a methodology that develops both computing and life skills. The 42 cursus is free for whoever is approved in its selection process.

👤 Author

• Tanathorn-Rin - GitHub Profile