About • How to use • Mandatory • Bonus • Norminette • License

ABOUT

The first project at 42, libft, involves learning how the standard functions of C programming work by writing them from scratch and creating a personal library. This project is vital as the library will be used in future assignments at 42.

If you're a 42 student, it's highly recommended that you go through the process of writing your code and testing it yourself rather than copying and pasting code that you only partially understand. If you've completed your piscine, there's no reason why you couldn't tackle this project on your own! Be patient and thorough.

• Subject PDF
• References GitHub

HOW TO USE

1º - Clone the repository

git clone git@github.com:jotavare/libft.git

2º - Enter the project folder and run make

cd libft/libft
make

3º - To use in your code, include the header

#include "libft.h"

MAKEFILE RULES

make - Compile libft mandatory files.

make bonus - Compile libft bonus files.

make all - Compile mandatory + bonus files.

make clean - Delete all .o (object files) files.

make fclean - Delete all .o (object file) and .a (executable) files.

make re - Use rules fclean + all.

MANDATORY

The mandatory functions in libft include both functions from the standard C library and other functions that are useful for character, string, and memory manipulation. These 34 mandatory functions are essential to achieving a grade of 100.

Check and manipulate characters:

Function	Description
ft_isalpha	Alphabetic character test.
ft_isdigit	Decimal-digit character test.
ft_isalnum	Alphanumeric character test.
ft_isascii	Test for ASCII character.
ft_toupper	Lower case to upper case letter conversion.
ft_tolower	Upper case to lower case letter conversion.

Manipulate strings:

Function	Description
ft_strlen	Find the length of the string.
ft_strlcpy	Size-bounded string copying.
ft_strlcat	Size-bounded string concatenation.
ft_strchr	Locate the character in the string (first occurrence).
ft_strrchr	Locate the character in the string (last occurrence).
ft_strncmp	Compare strings (size-bounded).
ft_strnstr	Locate a substring in a string (size-bounded)
ft_substr	Extract substring from a string.
ft_strjoin	Concatenate two strings into a new string (with malloc).
ft_strtrim	Trim the beginning and end of the string with the specified characters.
ft_split	Split string, with specified character as delimiter, into an array of strings.
ft_strmapi	Create a new string by modifying the string with a specified function.
ft_striteri	Iterates through a string, enabling character and index manipulation.

Manipulate memory:

Function	Description
ft_calloc	Memory allocation.
ft_memset	Write a byte to a byte string.
ft_bzero	Write zeroes to a byte string.
ft_memcpy	Copy memory area.
ft_memmove	Copy byte string.
ft_memchr	Locate byte in byte string.
ft_memcmp	Compare byte string.
ft_strdup	Save a copy of a string (with malloc).

Manipulate numbers:

Function	Description
ft_atoi	Convert the ASCII string to an integer.
ft_itoa	Convert integer to ASCII string.

Write to a file descriptor:

Function	Description
ft_putchar_fd	Output a character to the given file.
ft_putstr_fd	Output string to the given file.
ft_putendl_fd	Output string to given file with newline.
ft_putnbr_fd	Output integer to the given file.

BONUS

The bonus functions in libft are focused on list manipulation and are worth an additional 25 towards the final grade. To achieve a grade of 125, all 9 bonus functions and 34 mandatory functions must be completed accurately.

Function	Description
ft_lstnew	Create new list.
ft_lstadd_front	Add a new element at the beginning of the list.
ft_lstadd_back	Add a new element at the end of the list.
ft_lstsize	Count elements of a list.
ft_lstlast	Find the last element of the list.
ft_lstdelone	Delete element from the list.
ft_lstclear	Delete the sequence of elements of the list from a starting point.
ft_lstiter	Apply function to the content of all list elements.
ft_lstmap	Apply function to the content of all list elements into a new list.

NORMINETTE

At 42 School, it is expected that almost every project is written following the Norm, which is the coding standard of the school.

- No for, do...while, switch, case, goto, ternary operators, or variable-length arrays allowed;
- Each function must be a maximum of 25 lines, not counting the function's curly brackets;
- Each line must be at most 80 columns wide, with comments included;
- A function can take 4 named parameters maximum;
- No assigns and declarations in the same line (unless static);
- You can't declare more than 5 variables per function;
- ...

• 42 Norms - Information about 42 code norms. PDF
• Norminette - Tool to respect the code norm, made by 42. GitHub
• 42 Header - 42 header for Vim. GitHub

LICENSE

This work is published under the terms of Unlicense.