A custom C library that recreates essential functions from the standard C library, plus additional utility functions. This project is part of the 42 School curriculum and serves as a foundation for future C projects.

• About
• Functions
• Installation
• Usage
• Testing
• Project Structure

Libft is a project that requires implementing your own version of some of the Standard C Library functions, as well as some additional functions that can be used later to build a library of useful functions for the rest of the program.

The project is divided into three parts:

1. Part 1: Re-code a set of the libc functions, as defined in their man pages
2. Part 2: Code a set of functions that are either not included in the libc, or included in a different form
3. Bonus Part: Implement functions to manipulate linked lists

1. Clone the repository:

git clone https://github.com/yourusername/libft.git
cd libft

2. Compile the library:

make

3. To compile with bonus functions:

make bonus

Include the header file in your C program:

#include "libft.h"

Compile your program with the library:

gcc -Wall -Wextra -Werror your_program.c -L. -lft

#include "libft.h"
#include <stdio.h>

int main(void)
{
    char *str = "Hello, World!";
    char *upper_str;
    
    printf("Original: %s\n", str);
    printf("Length: %zu\n", ft_strlen(str));
    
    upper_str = ft_strmapi(str, (char (*)(unsigned int, char))ft_toupper);
    printf("Uppercase: %s\n", upper_str);
    
    free(upper_str);
    return (0);
}

The library has been tested with various test suites. You can test individual functions or use external testers:

# Compile and test
make
gcc test_file.c -L. -lft -o test
./test

Popular testing frameworks for libft:

• libft-unit-test
• Tripouille/libftTester

libft/
├── Makefile           # Build configuration
├── libft.h           # Header file with function prototypes
├── ft_*.c            # Implementation files for each function
├── *_bonus.c         # Bonus functions (linked list operations)
└── README.md         # This file

• make or make all: Compile the library
• make bonus: Compile with bonus functions
• make clean: Remove object files
• make fclean: Remove object files and library
• make re: Clean and recompile

• All functions are prefixed with ft_ to avoid conflicts with standard library functions
• The library follows the 42 School coding standards (Norminette)
• Memory management is handled carefully to avoid leaks
• Functions are designed to handle edge cases and null pointers appropriately

This project was completed as part of the 42 School curriculum.