README.md

libft

This project is about creating a library with useful functions for future projects.

How to use

• Clone the repository
• Run make to compile the library
• Include the header file libft.h in your project
• Compile your project with the library libft.a

Mandatory part

• the project must be written in accordance with the Norm
• the project must be written in the C language
• the functions must be prototyped in a header file called libft.h
• the functions must be written in separate .c files
• the functions must be compiled with the flags -Wall, -Wextra, and -Werror
• the library must be named libft.a

Part 1 - Libc functions

Function	Description
ft_isalpha	Checks if the character is an alphabetic character
ft_isdigit	Checks if the character is a digit
ft_isalnum	Checks if the character is an alphanumeric character
ft_isascii	Checks if the character is an ASCII character
ft_isprint	Checks if the character is a printable character
ft_toupper	Converts a lowercase letter to uppercase
ft_tolower	Converts an uppercase letter to lowercase
ft_strlen	Calculates the length of a string
ft_memset	Fills the first n bytes of the memory area pointed to by s with the constant byte c
ft_bzero	Writes n zeroed bytes to the string s
ft_memcpy	Copies n bytes from memory area src to memory area dest
ft_memccpy	Copies bytes from string src to string dest
ft_memmove	Copies n bytes from memory area src to memory area dest
ft_memchr	Locates the first occurrence of c (converted to an unsigned char) in string s
ft_memcmp	Compares byte string s1 against byte string s2
ft_strlcpy	Copies up to size - 1 characters from the NUL-terminated string src to dst
ft_strlcat	Appends the NUL-terminated string src to the end of dst
ft_strchr	Locates the first occurrence of c (converted to a char) in the string pointed to by s
ft_strrchr	Locates the last occurrence of c (converted to a char) in the string pointed to by s
ft_strnstr	Locates the first occurrence of the null-terminated string little in the string big
ft_strncmp	Compares not more than n characters. Because strncmp() is designed for comparing strings rather than binary data, characters that appear after a `\0' character are not compared
ft_atoi	Converts the initial portion of the string pointed to by str to int representation
ft_calloc	Allocates memory for an array of nmemb elements of size bytes each and returns a pointer to the allocated memory
ft_strdup	Allocates sufficient memory for a copy of the string s1, does the copy, and returns a pointer to it

Part 2 - Additional functions

Function	Description
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_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 file descriptor.

Exemple

cc -Wall -Wextra -Werror -I libft.h -L libft.a main.c

#include "libft.h"

int main(void)
{
    char *str = "Hello World!";
    ft_putstr_fd(str, 1);
    return (0);
}