📚 Libft - Your C Function Library

Spanish version 🇪🇸

libft is a C function library developed from scratch to replicate and improve some functions of the standard C library. It is a fundamental project at 42 school, designed to strengthen knowledge of the language and memory management.

📌 Features

✅ Custom implementations of standard functions.
✅ String, memory, and linked list manipulation functions.
✅ Code structured according to Norminette.
✅ Includes Get Next Line and ft_printf as extras.

🛠️ Implemented Functions

🔹 Conversion and Checking Functions

• ft_atoi - Converts a string to an integer.
• ft_isalnum - Checks if a character is alphanumeric.
• ft_isalpha - Checks if a character is a letter.
• ft_isascii - Checks if a character belongs to the ASCII table.
• ft_isdigit - Checks if a character is a digit.
• ft_isprint - Checks if a character is printable.
• ft_tolower - Converts an uppercase letter to lowercase.
• ft_toupper - Converts a lowercase letter to uppercase.

🔹 Memory Functions

• ft_bzero - Sets a block of memory to zero.
• ft_memset - Fills a block of memory with a specific value.
• ft_memcpy - Copies a block of memory.
• ft_memchr - Searches for a character in a block of memory.
• ft_memcmp - Compares two blocks of memory.
• ft_memmove - Copies a block of memory, even if they overlap.
• ft_calloc - Allocates memory initialized to zero.

🔹 String Functions

• ft_strlen - Calculates the length of a string.
• ft_strchr - Searches for a character in a string.
• ft_strrchr - Searches for a character in a string (last occurrence).
• ft_strncmp - Compares two strings.
• ft_strlcpy - Copies a string to another with limited size.
• ft_strlcat - Concatenates two strings with limited size.
• ft_strdup - Duplicates a string.
• ft_strnstr - Locates a substring within another string.
• ft_strjoin - Concatenates two strings.
• ft_strtrim - Removes unnecessary characters at the beginning and end of a string.
• ft_strmapi - Applies a function to each character of a string.
• ft_striteri - Applies a function to each character of a string (modifiable).
• ft_split - Splits a string into an array of strings.
• ft_substr - Extracts a substring from another string.

🔹 Input/Output Functions

• ft_putchar_fd - Writes a character to a file descriptor.
• ft_putstr_fd - Writes a string to a file descriptor.
• ft_putendl_fd - Writes a string with a newline to a file descriptor.
• ft_putnbr_fd - Writes a number to a file descriptor.

🔹 Additional Functions

• ft_itoa - Converts a number to a string.

🔹 Linked List Functions

• ft_lstnew - Creates a new node.
• ft_lstadd_front - Adds a node to the beginning of the list.
• ft_lstsize - Counts the number of nodes.

🚀 Included Extras

• Get Next Line (``): Efficient file reading line by line.
• ft_printf: Custom implementation of printf with support for multiple formats.

🔧 Installation and Usage

1️⃣ Clone the repository

git clone https://github.com/rpaparoni/libft_rpaparoni.git
cd libft_rpaparoni

2️⃣ Compile the library

make

This will generate libft.a, which you can include in any C project.

3️⃣ Use in your code

#include "libft.h"

int main()
{
    char *str = "Hello, world!";
    ft_printf("Length: %d\n", ft_strlen(str));
    return 0;
}

4️⃣ Compile your project with libft

gcc main.c -L. -lft -o program

🐙 GitHub: rpaparoni