chriss1245 / libft

Some libc funcitons from scratch

libft

Some libc funcitons from scratch

Installation

git clone https://github.com/chriss1245/libft.git

make -C libft

Usage

Inside your files

#include "libtf/inc/libft.h"

When compiling

gcc your_files.c libft/libft.a

Fuctions

Equal to libc's functions

Function	Description
ft_isalpha	Checks if the character is alphabetic
ft_isdigit	Checks if the character is a digit
ft_isalnum	Checks if the character is alphabetic or a digit
ft_isascii	Checks if the character belongs to the ascii characters
ft_print	Checks if the character is printable
ft_strlen	Returns the lenght of a string
ft_memset	Fills the first n entries in a string s with the character c
ft_bzero	Removes the first n entries in a string s
ft_memcpy	Copies n bytes from src to dest
ft_memmove	Moves n bytes from src to dest
ft_strlcpy	Copies up to n - 1 characters from a null-terminated string to a destination
ft_strlcat	Concatenates two strings up to n - 1 characters
ft_toupper	Converts a character to uppsercase if needed
ft_tolower	Converts a character to lowercase if needed
ft_strchr	Returns a pointer to the first occurrence of the character c in the string s
ft_strrchr	Returns a pointer to the last occurrence of the character c in the string s
ft_strncmp	Returns the difference among two strings. If the strings are equal until the n-th char it returns 0
ft_memchr	Returns a pointer to the first byte equal to c inside the first n characters or 0 otherwise
ft_memcmp	Returns the difference among to arrays of bytes until the n possition
ft_strnstr	Returns a pointer to the beggining of the first substring little inside a string bigger
ft_atoi	Converts a string of number into a integer
ft_calloc	Allocates memory for n elements of sizebytes and initialize those bytes to 0
ft_strdup	Returns a pointer to a copy of the given string

Additional functions

Function	Description
ft_substr	Creates a substring from s starting at start with a maxsize of len
ft_strjoin	Creates a new string concatenating s1 & s2
ft_strtrim	Returns a copy of s1 with the characters specified in set removed from the beginning and the end of the string
ft_split	Creates an array of strings (words) separated by a character inside a string
ft_itoa	Casts a integer to a string
ft_strmapi	Applies a function to each character of the copy of the given string. The copy is returned
ft_striteri	Applies a function to each character of a string
ft_putchar_fd	Writes a character in a file identified by a file descriptor
ft_putstr_fd	Writes a string in a file identified by a file descriptor
ft_putendl_fd	Writes a string in a file identified by a file descriptor with a line break
ft_putnbr_fd	Writes an integer to a file identified by a file descriptor

In addition, this library contains a typedef s_list (a linked list data structure)

s_list functions

Function	Description
ft_lstnew	Returns a pointer to a t_list with its content variable initialized to the given value
ft_lstadd_front	Adds the element new at the beginning of the list
ft_lstsize	Counts the number of elments of the given list
ft_lstlast	Returns the last element of the list
ft_lstadd_last	Adds the element new at the end of the list
ft_lstdelone	Deletes the content of an element using the given function
ft_lstclear	Deletes and frees the element and every successor using the given function
ft_lstiter	Applies a function to each element of the linked list
ft_lstmap	Applies a function to each element of the copied linked list. The first element of the linked list is returned

These were the funcitons we were told to implement on the libft library. However we can expand it with extra functions.

Submodules

Some functions are taken from libft idependent projects which have their own makefiles and headerfiles. They are added by importing their repositories as gitsubmodules. Then the makefile is on charge of assembling the whole library using the makefiles of the submodules.

printf

Function	Description
ft_printf	A simplified version of libc's printf

get_next_line

Function	Description
get_next_line	Returns the next read line from a file identified by a file descriptor

Note: There are more functions in both projects' headerfiles which can be used from libft since libft.h includes both: ft_printf.h and get_next_line.h