Libft

A recreation of essential C standard library functions, built from scratch as part of the 42 School curriculum.

Description

Libft is your first project at 42. It involves recreating several functions from the C standard library, as well as additional utility functions that will be useful throughout your studies. This library serves as the foundation for all future C projects at 42.

Features

• String manipulation functions: ft_strlen, ft_strcpy, ft_strcat, ft_strcmp, etc.
• Memory management functions: ft_memset, ft_memcpy, ft_memcmp, etc.
• Character checking functions: ft_isalpha, ft_isdigit, ft_isalnum, etc.
• Conversion functions: ft_atoi, ft_itoa
• Linked list functions: ft_lstnew, ft_lstadd, ft_lstdel, etc.

Compilation

make

This will create a libft.a static library file.

Usage

1. Clone the repository:

git clone https://github.com/bratzwitch/libft.git
cd libft

2. Compile the library:

make

3. Include in your project:

#include "libft.h"

4. Compile your program with the library:

gcc -Wall -Wextra -Werror your_file.c -L. -lft

Example

#include "libft.h"
#include <stdio.h>

int main()
{
    char *str = "Hello, 42!";
    printf("Length: %zu\n", ft_strlen(str));
    
    char *dup = ft_strdup(str);
    printf("Duplicate: %s\n", dup);
    free(dup);
    
    return (0);
}

Functions Implemented

Part 1 - Libc functions

• ft_memset, ft_bzero, ft_memcpy, ft_memccpy, ft_memmove, ft_memchr, ft_memcmp
• ft_strlen, ft_strlcpy, ft_strlcat, ft_strchr, ft_strrchr, ft_strnstr, ft_strncmp
• ft_atoi, ft_isalpha, ft_isdigit, ft_isalnum, ft_isascii, ft_isprint
• ft_toupper, ft_tolower, ft_calloc, ft_strdup

Part 2 - Additional functions

• ft_substr, ft_strjoin, ft_strtrim, ft_split, ft_itoa, ft_strmapi, ft_putchar_fd, ft_putstr_fd, ft_putendl_fd, ft_putnbr_fd

Bonus - Linked list functions

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

Requirements

• GCC compiler
• Make

Author

Viacheslav Moroz - 42 Student