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Ft_libft is a 42 school project that involves building a custom library of useful C functions. The library includes functions for memory manipulation, string manipulation, and other common operations in C programming. The project requires a solid understanding of data structures, memory management, and the standard library functions in C.

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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);
}

About

Ft_libft is a 42 school project that involves building a custom library of useful C functions. The library includes functions for memory manipulation, string manipulation, and other common operations in C programming. The project requires a solid understanding of data structures, memory management, and the standard library functions in C.

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