libft

Introduction

This project is an integral part of the 42 School curriculum, designed to deepen your understanding of the C programming language by creating a custom library of functions. The goal is to implement a set of standard C library functions, prefixed with "ft_", and to further enhance your library with bonus functions focused on linked list manipulation.

Key Functions

Mandatory Part

1. ft_isalpha

   • Checks if a character is an alphabetic character.

2. ft_isdigit

   • Checks if a character is a digit (0-9).

3. ft_isalnum

   • Checks if a character is alphanumeric.

4. ft_isascii

   • Checks if a character is within the ASCII character set.

5. ft_isprint

   • Checks if a character is printable (including space).

6. ft_strlen

   • Calculates the length of a string.

7. ft_memset

   • Fills a block of memory with a specified value.

8. ft_bzero

   • Sets the first n bytes of the memory area pointed to by s to zero.

9. ft_memcpy

   • Copies n bytes from memory area src to memory area dest.

10. ft_memmove

    • Copies n bytes from src to dest, handling overlapping memory.

11. ft_strlcpy

    • Copies up to size - 1 characters from the NUL-terminated string src to dest.

12. ft_strlcat

    • Appends the NUL-terminated string src to the end of dest.

13. ft_toupper

    • Converts a lowercase letter to uppercase.

14. ft_tolower

    • Converts an uppercase letter to lowercase.

15. ft_strchr

    • Locates the first occurrence of a character in a string.

16. ft_strrchr

    • Locates the last occurrence of a character in a string.

17. ft_strncmp

    • Compares the first n characters of two strings.

18. ft_memchr

    • Locates the first occurrence of c in the first n bytes of the string pointed to by s.

19. ft_memcmp

    • Compares two memory blocks.

20. ft_strnstr

    • Locates a substring in a string.

21. ft_atoi

    • Converts a string to an integer.

22. ft_calloc

    • Allocates memory for an array of nmemb elements of size bytes each and initializes the memory to zero.

23. ft_strdup

    • Allocates sufficient memory for a copy of the string, does the copy, and returns a pointer to it.

Bonus Part (Linked List Functions)

24. ft_lstnew

    • Allocates and returns a new element with the given content.

25. ft_lstadd_front

    • Adds the element ’new’ at the beginning of the list.

26. ft_lstsize

    • Counts the number of elements in a list.

27. ft_lstlast

    • Returns the last element of the list.

28. ft_lstadd_back

    • Adds the element ’new’ at the end of the list.

29. ft_lstdelone

    • Takes as a parameter an element and frees the memory of the element’s content using the function ’del’ given as a parameter and free the element.

30. ft_lstclear

    • Deletes and frees the given element and every successor of that element, using the function ’del’ and free.

31. ft_lstiter

    • Iterates the list ’lst’ and applies the function ’f’ to the content of each element.

32. ft_lstmap

    • Iterates the list ’lst’ and applies the function ’f’ to the content of each element. Creates a new list resulting from the successive applications of ’f’.

How to Use

1. Clone the repository:

   git clone https://github.com/your-username/libft.git

2. Navigate to the project folder:

   cd libft

3. Compile the library:

   make

   This will generate the libft.a library.

4. Use the library in your C projects:

   • Copy the libft.a file to your project folder.

   • Include the libft.h header file in your C files.

   • Compile your project with the library:

     gcc -Wall -Wextra -Werror -o your_program your_file.c libft.a

5. Clean up:

   make clean

   This removes object files.

6. If you want to remove the library and object files:

   make fclean