cvine21 / libft

Implementation of a few functions of the C standard library

Libft

My very first own library

Table of contents

• About libft
• Mandatory part
• Bonus part
• How to run project

About libft

This is a project of school 21 (école 42).

The goal of the project is to create a library libft.a consisting of functions from the redone libc functions. These functions have the same prototypes and implement the same behaviors as the originals. They comply with the way they are defined in their man. The only difference is their names. They begin with the ’ft_’ prefix. For instance, strlen becomes ft_strlen.

It's forbidden to use libc functions except for some.

Mandatory part

Mandatory part contains 2 types of functions:

• Libc functions (redone functions from the libc): ft_isalpha, ft_isdigit, ft_isalnum, ft_isascii, ft_isprint, ft_strlen, ft_memset, ft_bzero, ft_memcpy, ft_memmove, ft_strlcpy, ft_strlcat, ft_toupper, ft_tolower, ft_strchr, ft_strrchr, ft_strncmp, ft_memchr, ft_memcmp, ft_strnstr, ft_atoi, ft_calloc, ft_substr.

• Additional functions (set of functions that are either not in the libc, or that are part of it but in a different form):

Additional functions	Description of additional functions
ft_substr	Allocates (with malloc(3)) and returns a substring from the string ’s’. The substring begins at index ’start’ and is of maximum size ’len’.
ft_strjoin	Allocates (with malloc(3)) and returns a new string, which is the result of the concatenation of ’s1’ and ’s2’.
ft_strtrim	Allocates (with malloc(3)) and returns a copy of ’s1’ with the characters specified in ’set’ removed from the beginning and the end of the string.
ft_split	Allocates (with malloc(3)) and returns an array of strings obtained by splitting ’s’ using the character ’c’ as a delimiter. The array must end with a NULL pointer.
ft_itoa	Allocates (with malloc(3)) and returns a string representing the integer received as an argument. Negative numbers must be handled.
ft_strmapi	Applies the function ’f’ to each character of the string ’s’, and passing its index as first argument to create a new string (with malloc(3)) resulting from successive applications of ’f’.
ft_striteri	Applies the function ’f’ on each character of the string passed as argument, passing its index as first argument. Each character is passed by address to ’f’ to be modified if necessary.
ft_putchar_fd	Outputs the character ’c’ to the given file descriptor.
ft_putstr_fd	Outputs the string ’s’ to the given file descriptor.
ft_putendl_fd	Outputs the string ’s’ to the given file descriptor followed by a newline.
ft_putnbr_fd	Outputs the integer ’n’ to the given filedescriptor.
ft_isnumber	Tests if the string contains only decimal digit character.

Bonus part

Contains functions manipulating lists.

Bonus functions:

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

How to run project

1. Clone this repo and go to the cloned directoty called libft

$> git clone https://github.com/cvine21/libft.git
$> cd libft/

2. Run Makefile so you can build the library

• To run mandatory part:

$> make

• To run bonus part:

$> make bonus