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.