/libft

Your first library

Primary LanguageC

libft | 42 Madrid

Your very own first library 😄

Table of Contents

Introduction

In this project we'll be implementing our home-made functions from libc, which will be very useful to get familiar with memory allocation, and to think of creative ways to code these functions.

For more detailed information, look at the subject of this project.

Function Overview

Function Description
ft_atoi Reads a String, and, after ignoring spaces, saves the string into an integer
ft_bzero Writes n zeroes to the string s
ft_calloc Reserves x blocks of y bits of memory
ft_isalnum Returns 1 if the input is a number or a letter in the ASCII table
ft_isalpha Returns 1 if the input is a letter in the ASCII table
ft_isascii Returns whether or not a value belongs to the ASCII table
ft_isdigit Returns 1 if the input is a number in the ASCII table
ft_isprint Returns whether a character is printable
ft_itoa Saves the given number as a string (char array)
ft_memchr Looks for a matching character inside a part of the memory
ft_memcmp Compares two parts of memory, returning 0 if they're the same, or else a nonzero value
ft_memcpy Copies from one part of memory to another, ignoring possible overlaps
ft_memmove Copies from one part of memory to another, preventing possible overlaps
ft_memset Assigns a character n times to a part of the memory
ft_putchar_fd Prints a character to the given file descriptor
ft_putendl_fd Prints a string followed by a new line \n to a given file descriptor
ft_putnbr_fd Prints number to the given file descriptor
ft_putstr_fd Prints string to the given file descriptor
ft_split Splits a string according to a given separator character
ft_strchr Looks for a specific character inside a given string
ft_strdup Saves enoug space and duplicates a string
ft_strjoin Concatenates two strings allocating enough space first
ft_strlcat Concatenates two strings ensuring it ends with \0
ft_strlcpy Copies n - 1 bytes from a source string to a destination string
ft_strlen Returns length of a string
ft_strmapi Applies a function (mapping) to every element in a string
ft_strncmp Compares two strings up to the n-th character
ft_strnstr Tries to find a substring (needle) in a second string (haystack) before the n-th char is reached
ft_strrchr Looks for a given character in a string, reading it from back to front
ft_strtrim Removes occurrences of characters in a string from the start and end of another one
ft_substr Copies from the n-th char of a string
ft_tolower Makes every uppercase character in a string lowercase
ft_toupper Makes every lowercase character in a string uppercase

Bonus

For this part we implemented a struct defining the well-known linked lists

typedef	struct	s_list
{
	void		*content;
	struct	s_list	*next;
}			t_list;

Bonus functions to implement

Bonus Function Description
ft_lstnew Creates new node allocating with malloc
ft_lstadd_front Adds new node at the beginning of the linked list
ft_lstsize Returns number of elements of linked list
ft_lstlast Retrieves last node of the list
ft_lstadd_back Adds new node at the end of the linked list
ft_lstdelone Deletes, frees, and applies function del to content of a given node
ft_lstclear Deletes a given element and every element after that
ft_lstiter Applies a function to the content of every node of the linked list
ft_lstmap Applies function to a copy of the list, freeing when necessary

Installation

To test this library out, it's recommended that you have the following packages installed

gcc clang make python-norminette valgrind (linux)

Clone the repository

git clone https://github.com/mhernangilp/libft.git
cd libft
make
  • Usage:
make all		Compiles the libft.a file
make bonus		Compiles all bonus files instead of the mandatory ones