At 1337 we are not allowed using functions that already exist, so this is why LIBFT came for. We must recreate some standard C library functions including some additional ones.

• Part 1 : Reimplementation of standard C library functions

strcpy strcat strlen isalpha isdigit isalnum isascii isprint strlen memset bzero memcpy memmove strlcpy strlcat toupper tolower strchr strrchr strncmp memchr memcmp strnstr atoi calloc strdup

• Part 2 : 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.

ft_putnbr_fd Outputs the integer ’n’ to the given file descriptor.

• Part 3 : Bonus

ft_lstnew Allocates (with malloc(3)) and returns a new node. The member variable ’content’ is initialized with the value of the parameter ’content’. The variable ’next’ is initialized to NULL.

ft_lstadd_front Adds the node ’new’ at the beginning of the list.

ft_lstsize Counts the number of nodes in a list.

ft_lstlast Returns the last node of the list.

ft_lstadd_back Adds the node ’new’ at the end of the list.

ft_lstdelone Takes as a parameter a node and frees the memory of the node’s content using the function ’del’ given as a parameter and free the node. The memory of ’next’ must not be freed.

ft_lstclear Deletes and frees the given node and every successor of that node, using the function ’del’ and free(3). Finally, the pointer to the list must be set to NULL.

ft_lstiter Iterates the list ’lst’ and applies the function ’f’ on the content of each node.

ft_lstmap Iterates the list ’lst’ and applies the function ’f’ on the content of each node. Creates a new list resulting of the successive applications of the function ’f’. The ’del’ function is used to delete the content of a node if needed.