qduong42 / 42_Libft

Libft - @42Wolfsburg

Your very first own Library

About

Libft is the very first project at 42. We learn basic conditional thinking with loops, if conditions, about different data types: size_t, int, char array and dynamic memory allocation. The main goal is not only to have a good understanding of Basic building blocks of the C programmming language specifically but also in general.

Installation & Usage

Requirements

The only requirements are:

• GNU make (v3.81)
• GCC (12.0.0) (clang-1200.0.32.28)

Those versions are the ones used during development.

Building the program

1. Download/Clone this repo

    git clone https://github.com/qduong42/42_Libft
   

2. cd into the root directory and run make

    cd 42_Libft
    make
   

Running the program

After running make, the libft.a library with all functions contained can be used.

Main Project Instructions

Mandatory

• Only use C
• Must respect the 42 imposed coding style The Norminator
• No memory leaks
• Implement these standard libc functions:
  • "isX" family functions: alpha, digit, alnum, ascii, print
  • string manipulation: strlcpy, strlcat, strncmp, strnstr
  • string utility: strlen, strdup, strchr, strrchr
  • Memory functions: memset, bzero, memcpy, memmove, memchr, memcmp
  • atoi
  • calloc
  • strdup
• Additional functions (not in the man or in a different form)
  • ft_substr : Creating a substring from a given string
  • ft_strjoin: Joining two strings together.
  • ft_strtrim: Trim a string of set characters.
  • ft_split : Split a string according to a given delimiter
  • ft_itoa : Convert an integer into a string.
  • ft_strmapi: Applying external function to a string. creates new string
  • ft_iteri : Same as strmapi but modifies existing string.
  • ft_putchar_fd: Puts one character into given fd stream.
  • ft_putstr_fd : Puts a string into given fd stream.
  • ft_putendl_fd: Like putstr but adds \n at end
  • ft_putnbr_fd: Writes a number given as a string in given fd stream.
• Must have a Makefile to build the program
• The library must be called libft.a
• Must have a header file libft.h

Bonuses

• Linked List functions:
  • ft_lstnew : Creates new node and assigns it a content.
  • ft_lstadd_front: Adds node to front of list
  • ft_lstadd_back : Adds node to back of list.
  • ft_lstlast : Returns the last node of ths list.
  • ft_lstsize : Returns number of nodes in list.
  • ft_lstdelone : Frees the node and deletes content with external function.
  • ft_lstclear : Deletes and frees the node and successor, clears whole list.
  • ft_lstiter : Iterates through list and applies function f.
  • ft_lstmap : like lstiter but creates new list with only successful applications.

Notes

• Some functions are commented for ease of understanding
• There are probably better ways to implement it, we are limited by a set of functions at 42. (Limitation ensures that we have a deeper understanding of what is going on behind the hood), please review the project instructions before you explain how X or Y would have been a better way to do it ;)

Enjoy!