Libft

Summary

42 school's first project, libft, is about learning how the standard functions of C programming work, by coding them from scratch and creating our very own library.

Getting started

First, clone this repository and cd into it:

$ git clone https://github.com/riceset/libft; cd libft

Compile the library with:

$ make

Or use the following command to compile it with the bonus files:

$ make bonus

Usage

After running make a file called libft.a (.a is an extention used for static libraries) will be generated.

To use it, create a main function somewhere and include the libft.h header file into it.

#include "libft.h"

int main(void)
{
    ft_putstr_fd("Hello World!\n", 1);
    return (0);
}

When compiling it, include the libft.a library with it.

$ cc main.c libft.a -I ./includes -o main

Output:

Hello World!

Mandatory Functions

The mandatory functions of libft are either functions from the standard C library or other useful functions. They are mostly useful for character, string and memory manipulation. These 34 mandatory functions must be done correctly to get a 100% grade.

Functions to check and manipulate characters

ft_isalpha
ft_isdigit
ft_isalnum
ft_isascii
ft_isprint
ft_toupper
ft_tolower

Functions to manipulate strings

ft_strlen
ft_strlcpy
ft_strlcat
ft_strchr
ft_strrchr
ft_strncmp
ft_strnstr
ft_substr
ft_strjoin
ft_strtrim
ft_split
ft_strmapi
ft_striteri

Functions to manipulate memory

ft_calloc
ft_memset
ft_bzero
ft_memcpy
ft_memmove
ft_memchr
ft_memcmp
ft_strdup

Functions for numbers

ft_atoi
ft_itoa

Functions to write to a file descriptor

ft_putchar_fd
ft_putstr_fd
ft_putendl_fd
ft_putnbr_fd

Bonus Functions

The bonus functions of libft deal with list manipulation. This part is worth an extra 25% to the final grade.

ft_lstnew
ft_lstadd_front
ft_lstsize
ft_lstlast
ft_lstadd_back
ft_lstdelone
ft_lstclear
ft_lstiter
ft_lstmap

Observations

Some functions weren't mentioned above.