Libft is a custom implementation of the standard C library functions. It is a foundational project in the 42 curriculum that helps students understand and recreate essential functions from the C standard library. The project involves writing functions for memory management, string manipulation, linked lists, and other utility functions.
- Memory Management: Functions to allocate, deallocate, and manipulate memory.
- String Manipulation: Functions to handle and manipulate C strings.
- Linked Lists: Basic linked list operations.
- Utility Functions: Various helper functions to perform common tasks.
The project is divided into several parts:
- Libc Functions: Reimplementation of standard libc functions.
- Additional Functions: Extra functions that are not part of the standard library but are useful.
- Bonus Part: Implementation of linked list functions.
void *ft_memset(void *b, int c, size_t len);- Fills memory with a constant byte.void ft_bzero(void *s, size_t n);- Sets memory to zero.void *ft_memcpy(void *dst, const void *src, size_t n);- Copies memory area.void *ft_memccpy(void *dst, const void *src, int c, size_t n);- Copies memory until a character is found.void *ft_memmove(void *dst, const void *src, size_t len);- Moves memory area.void *ft_memchr(const void *s, int c, size_t n);- Scans memory for a character.int ft_memcmp(const void *s1, const void *s2, size_t n);- Compares memory areas.
size_t ft_strlen(const char *s);- Computes the length of a string.char *ft_strdup(const char *s1);- Duplicates a string.char *ft_strcpy(char *dst, const char *src);- Copies a string.char *ft_strncpy(char *dst, const char *src, size_t len);- Copies a string with length limit.char *ft_strcat(char *s1, const char *s2);- Concatenates two strings.char *ft_strncat(char *s1, const char *s2, size_t n);- Concatenates two strings with length limit.size_t ft_strlcat(char *dst, const char *src, size_t dstsize);- Concatenates strings with size limit.char *ft_strchr(const char *s, int c);- Locates a character in a string.char *ft_strrchr(const char *s, int c);- Locates a character in a string from the end.char *ft_strstr(const char *haystack, const char *needle);- Locates a substring.char *ft_strnstr(const char *haystack, const char *needle, size_t len);- Locates a substring with length limit.int ft_strcmp(const char *s1, const char *s2);- Compares two strings.int ft_strncmp(const char *s1, const char *s2, size_t n);- Compares two strings with length limit.
t_list *ft_lstnew(void const *content, size_t content_size);- Creates a new list element.void ft_lstdelone(t_list **alst, void (*del)(void *, size_t));- Deletes a list element.void ft_lstdel(t_list **alst, void (*del)(void *, size_t));- Deletes a list.void ft_lstadd(t_list **alst, t_list *new);- Adds an element at the beginning of a list.void ft_lstiter(t_list *lst, void (*f)(t_list *elem));- Iterates over a list.t_list *ft_lstmap(t_list *lst, t_list *(*f)(t_list *elem));- Applies a function to each element of a list.
int ft_atoi(const char *str);- Converts a string to an integer.int ft_isalpha(int c);- Checks for an alphabetic character.int ft_isdigit(int c);- Checks for a digit (0 through 9).int ft_isalnum(int c);- Checks for an alphanumeric character.int ft_isascii(int c);- Checks for an ASCII character.int ft_isprint(int c);- Checks for a printable character.int ft_toupper(int c);- Converts a character to uppercase.int ft_tolower(int c);- Converts a character to lowercase.
Use the provided Makefile to compile the library:
make: Compiles the library.make clean: Removes object files.make fclean: Removes object files and the library.make re: Recompiles the library from scratch.
You can write your own tests or use available testing frameworks to ensure the correctness of your functions.
Libft is an excellent way to deepen your understanding of C programming and the inner workings of the standard library. Completing this project will provide a strong foundation for more advanced programming tasks.