diff --git a/char/ft_isalnum.c b/char/ft_isalnum.c
index 6898862..5f636ff 100644
--- a/char/ft_isalnum.c
+++ b/char/ft_isalnum.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 12:47:28 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 12:54:42 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:31:27 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "char.h"
 
 /**
  * @brief Check if the character is alpha-numeric
diff --git a/char/ft_isalpha.c b/char/ft_isalpha.c
index 8f93d59..f5dd4ba 100644
--- a/char/ft_isalpha.c
+++ b/char/ft_isalpha.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 /**
  * @brief Check if the character is alpha
diff --git a/char/ft_isascii.c b/char/ft_isascii.c
index 942e780..953b871 100644
--- a/char/ft_isascii.c
+++ b/char/ft_isascii.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 /**
  * @brief Check if the character is in the ascii table
diff --git a/char/ft_isdigit.c b/char/ft_isdigit.c
index ac3315e..6876a6d 100644
--- a/char/ft_isdigit.c
+++ b/char/ft_isdigit.c
@@ -6,12 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 12:44:28 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 12:49:05 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:25:14 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
-
 /**
  * @brief Check if the character is alpha numeric
  *
diff --git a/char/ft_isprint.c b/char/ft_isprint.c
index d77c82a..2e0f350 100644
--- a/char/ft_isprint.c
+++ b/char/ft_isprint.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 /**
  * @brief Check if the character is printable
diff --git a/char/ft_tolower.c b/char/ft_tolower.c
index 5130815..caa76d2 100644
--- a/char/ft_tolower.c
+++ b/char/ft_tolower.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 /**
  * @brief convert the upper case to lower case
diff --git a/char/ft_toupper.c b/char/ft_toupper.c
index d3c01b4..dcf91df 100644
--- a/char/ft_toupper.c
+++ b/char/ft_toupper.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 /**
  * @brief convert the lower case to upper case
diff --git a/convert/ft_atoi.c b/convert/ft_atoi.c
index d4830ec..bffd529 100644
--- a/convert/ft_atoi.c
+++ b/convert/ft_atoi.c
@@ -10,7 +10,7 @@
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+
 
 static int	ft_check_space(int c)
 {
diff --git a/convert/ft_atoll.c b/convert/ft_atoll.c
index 414010e..69ae348 100644
--- a/convert/ft_atoll.c
+++ b/convert/ft_atoll.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/10/31 15:12:07 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 15:14:50 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:32:11 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 static int	ft_check_space(int c)
 {
diff --git a/convert/ft_itoa.c b/convert/ft_itoa.c
index 6104fe3..f25351a 100644
--- a/convert/ft_itoa.c
+++ b/convert/ft_itoa.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:56:30 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 13:02:55 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:30:01 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include "memory.h"
 
 static size_t	ft_check_sign(char *str, long *nb)
 {
diff --git a/list/ft_lstadd_back.c b/list/ft_lstadd_back.c
index 344a851..03da61e 100644
--- a/list/ft_lstadd_back.c
+++ b/list/ft_lstadd_back.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:39:56 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:29:37 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:35:17 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
  * @brief Add the list new to the back of chained list of lst
diff --git a/list/ft_lstadd_front.c b/list/ft_lstadd_front.c
index 42dcf9a..aad3a53 100644
--- a/list/ft_lstadd_front.c
+++ b/list/ft_lstadd_front.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:40:16 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:30:01 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:35:45 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
  * @brief Add the list new to the front of chained list of lst
diff --git a/list/ft_lstclear.c b/list/ft_lstclear.c
index 4a34087..77e0359 100644
--- a/list/ft_lstclear.c
+++ b/list/ft_lstclear.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:40:37 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:32:23 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:33:31 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
 
 /**
  * @brief Clear the all list with the function
diff --git a/list/ft_lstdelone.c b/list/ft_lstdelone.c
index 21cc2dd..7948114 100644
--- a/list/ft_lstdelone.c
+++ b/list/ft_lstdelone.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:42:11 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:46:00 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:36:07 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <stdlib.h>
 
 /**
  * @brief Clear the element of the list with the function
diff --git a/list/ft_lstiter.c b/list/ft_lstiter.c
index 717f8a5..0fb98c5 100644
--- a/list/ft_lstiter.c
+++ b/list/ft_lstiter.c
@@ -6,14 +6,15 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:42:24 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:46:55 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:35:17 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
- * @brief Apply the function given in arguments at all the element of the list
+ * @brief Apply the fstunction given in arguments at all the element of the list
  *
  * @param lst the chained list
  * @param f the pointer to function
diff --git a/list/ft_lstlast.c b/list/ft_lstlast.c
index 4d64a7b..b6e6a56 100644
--- a/list/ft_lstlast.c
+++ b/list/ft_lstlast.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:42:54 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:48:08 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:36:47 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
  * @brief Found the last element of the chained list
diff --git a/list/ft_lstmap.c b/list/ft_lstmap.c
index d1c505c..0299b5d 100644
--- a/list/ft_lstmap.c
+++ b/list/ft_lstmap.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:43:28 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:51:38 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:37:46 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
  * @brief Create an other list from an old one with a function on all element
diff --git a/list/ft_lstnew.c b/list/ft_lstnew.c
index 816fea4..bdef868 100644
--- a/list/ft_lstnew.c
+++ b/list/ft_lstnew.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:44:02 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:52:24 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:39:00 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <stdlib.h>
 
 /**
  * @brief Allocate a new list with the first element
diff --git a/list/ft_lstsize.c b/list/ft_lstsize.c
index fffaf49..e58fe3f 100644
--- a/list/ft_lstsize.c
+++ b/list/ft_lstsize.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/12 11:44:24 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:53:11 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:39:28 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "list.h"
+#include <unistd.h>
 
 /**
  * @brief Give the size of the chained list
diff --git a/memory/ft_bzero.c b/memory/ft_bzero.c
index 2492e03..732ea50 100644
--- a/memory/ft_bzero.c
+++ b/memory/ft_bzero.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:43:13 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:54:25 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:39:50 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "memory.h"
+#include <unistd.h>
 
 /**
  * @brief Sets a block of memory to zero
diff --git a/memory/ft_calloc.c b/memory/ft_calloc.c
index db1e5d0..3f7583f 100644
--- a/memory/ft_calloc.c
+++ b/memory/ft_calloc.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:47:17 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:55:30 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:28:34 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "memory.h"
+#include <stdlib.h>
 
 /**
  * @brief Allocates and zeroes memory for an array
diff --git a/memory/ft_memchr.c b/memory/ft_memchr.c
index 6dd568d..1d8bb75 100644
--- a/memory/ft_memchr.c
+++ b/memory/ft_memchr.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:48:30 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:59:07 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:40:36 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "memory.h"
+#include <unistd.h>
 
 /**
  * @brief Scans memory for a byte
diff --git a/memory/ft_memcmp.c b/memory/ft_memcmp.c
index 3b88c68..7c3d955 100644
--- a/memory/ft_memcmp.c
+++ b/memory/ft_memcmp.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:49:04 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:59:48 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:40:58 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Compares two memory blocks
diff --git a/memory/ft_memcpy.c b/memory/ft_memcpy.c
index 4da7a37..4c35af1 100644
--- a/memory/ft_memcpy.c
+++ b/memory/ft_memcpy.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:49:46 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:57:31 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:41:32 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Copies memory from source to destination
diff --git a/memory/ft_memmove.c b/memory/ft_memmove.c
index 96037b0..eafef17 100644
--- a/memory/ft_memmove.c
+++ b/memory/ft_memmove.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:51:35 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:15:19 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:41:47 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 char	*ft_checks(char *s, char *d, size_t n)
 {
diff --git a/memory/ft_memset.c b/memory/ft_memset.c
index f88525f..e4825d6 100644
--- a/memory/ft_memset.c
+++ b/memory/ft_memset.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:50:29 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 17:56:59 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 16:42:01 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Fills a block of memory with a specified byte
diff --git a/print/ft_printf.c b/print/ft_printf.c
index fa158ed..a051a98 100644
--- a/print/ft_printf.c
+++ b/print/ft_printf.c
@@ -6,11 +6,14 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/14 17:27:44 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:01:28 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:58:00 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <stdarg.h>
+#include <stdlib.h>
+#include <unistd.h>
 
 void	_print_char(int fd, char c, int *ret_value);
 void	_print_nbr(int fd, int nb, int *ret_value);
diff --git a/print/ft_put.c b/print/ft_put.c
index 840aa6a..661f0e8 100644
--- a/print/ft_put.c
+++ b/print/ft_put.c
@@ -6,18 +6,13 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/16 12:13:14 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 16:16:45 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:57:36 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
-
-void	_print_char(int fd, char c, int *ret_value);
-void	_print_nbr(int fd, int nb, int *ret_value);
-void	_print_base(\
-		int fd, unsigned long long nbr, int *ret_value, char c);
-void	_print_unsigned(int fd, unsigned int nb, int *ret_value);
-void	_print_str(int fd, char *str, int *ret_value);
+#include "str.h"
+#include <limits.h>
+#include <unistd.h>
 
 void	_print_char(int fd, char c, int *ret_value)
 {
@@ -25,6 +20,25 @@ void	_print_char(int fd, char c, int *ret_value)
 	(*ret_value)++;
 }
 
+void	_print_unsigned(int fd, unsigned int nb, int *ret_value)
+{
+	if (nb >= 10)
+	{
+		_print_unsigned(fd, nb / 10, ret_value);
+		nb = nb % 10;
+	}
+	if (nb < 10)
+		_print_char(fd, nb + 48, ret_value);
+}
+
+void	_print_str(int fd, char *str, int *ret_value)
+{
+	if (!str)
+		*ret_value += write(fd, "(null)", 6);
+	else
+		*ret_value += write(fd, str, ft_strlen(str));
+}
+
 void	_print_nbr(int fd, int nb, int *ret_value)
 {
 	if (nb < 0)
@@ -36,8 +50,7 @@ void	_print_nbr(int fd, int nb, int *ret_value)
 			return ;
 		}
 		nb = -nb;
-		_print_char(fd, '-', ret_value);
-	}
+		_print_char(fd, '-', ret_value); }
 	if (nb >= 10)
 	{
 		_print_nbr(fd, nb / 10, ret_value);
@@ -76,22 +89,3 @@ void	_print_base(\
 		_print_char(fd, base[nbr % 16], ret_value);
 	}
 }
-
-void	_print_unsigned(int fd, unsigned int nb, int *ret_value)
-{
-	if (nb >= 10)
-	{
-		_print_unsigned(fd, nb / 10, ret_value);
-		nb = nb % 10;
-	}
-	if (nb < 10)
-		_print_char(fd, nb + 48, ret_value);
-}
-
-void	_print_str(int fd, char *str, int *ret_value)
-{
-	if (!str)
-		*ret_value += write(fd, "(null)", 6);
-	else
-		*ret_value += write(fd, str, ft_strlen(str));
-}
diff --git a/print/ft_putchar_fd.c b/print/ft_putchar_fd.c
index 592a3a6..0bb8f44 100644
--- a/print/ft_putchar_fd.c
+++ b/print/ft_putchar_fd.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:58:22 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:02:37 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:46:44 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief print an character on a file descriptor
diff --git a/print/ft_putendl_fd.c b/print/ft_putendl_fd.c
index 8d53376..734c2b1 100644
--- a/print/ft_putendl_fd.c
+++ b/print/ft_putendl_fd.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:59:01 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:03:47 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:46:30 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "print.h"
 
 /**
  * @brief Print a string follow by a new line on a file descriptor
diff --git a/print/ft_putnbr_fd.c b/print/ft_putnbr_fd.c
index 17aeedf..220824f 100644
--- a/print/ft_putnbr_fd.c
+++ b/print/ft_putnbr_fd.c
@@ -6,11 +6,13 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:59:18 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:04:17 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:47:41 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "print.h"
+#include "memory.h"
+#include <unistd.h>
 
 static int	ft_check_sign(int n, char *str, size_t *i, int fd)
 {
diff --git a/print/ft_putstr_fd.c b/print/ft_putstr_fd.c
index 70a3bc9..3a0782f 100644
--- a/print/ft_putstr_fd.c
+++ b/print/ft_putstr_fd.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:58:46 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:05:11 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:48:07 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <unistd.h>
 
 /**
  * @brief print a string on a file descriptor
diff --git a/str/ft_split.c b/str/ft_split.c
index 95f71df..ad124d3 100644
--- a/str/ft_split.c
+++ b/str/ft_split.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:56:02 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:13:39 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:49:19 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <stdlib.h>
 
 static int	count_words(const char *str, char sep)
 {
diff --git a/str/ft_strchr.c b/str/ft_strchr.c
index 82ee8bd..472841e 100644
--- a/str/ft_strchr.c
+++ b/str/ft_strchr.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:32:19 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:13:01 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:49:27 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <unistd.h>
 
 /**
  * @brief Locates the first occurrence of a character in a string.
diff --git a/str/ft_strcmp.c b/str/ft_strcmp.c
index 08ad900..6ef1976 100644
--- a/str/ft_strcmp.c
+++ b/str/ft_strcmp.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:56:56 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:07:20 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:50:06 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Compares two strings lexicographically.
diff --git a/str/ft_strcpy.c b/str/ft_strcpy.c
index 756166a..36eae2a 100644
--- a/str/ft_strcpy.c
+++ b/str/ft_strcpy.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/10/31 16:14:10 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:14:03 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:36:18 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Copies a string.
diff --git a/str/ft_strdup.c b/str/ft_strdup.c
index 15a229a..0a1a8c6 100644
--- a/str/ft_strdup.c
+++ b/str/ft_strdup.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:53:59 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:14:44 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:58:58 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <stdlib.h>
 
 /**
  * @brief Duplicates a string.
diff --git a/str/ft_striteri.c b/str/ft_striteri.c
index 581d59a..3a88652 100644
--- a/str/ft_striteri.c
+++ b/str/ft_striteri.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:57:34 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:11:04 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:50:26 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Applies a function to each character of a string.
diff --git a/str/ft_strjoin.c b/str/ft_strjoin.c
index 8b353b0..ca95a58 100644
--- a/str/ft_strjoin.c
+++ b/str/ft_strjoin.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:55:15 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:13:21 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:58:58 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <stdlib.h>
 
 /**
  * @brief Joins two strings into a new string.
diff --git a/str/ft_strlcat.c b/str/ft_strlcat.c
index 2dde695..f8bbf79 100644
--- a/str/ft_strlcat.c
+++ b/str/ft_strlcat.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/08 22:28:26 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:10:19 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:52:29 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <unistd.h>
 
 static size_t	ft_strnlen(char *dest, size_t size)
 {
diff --git a/str/ft_strlcpy.c b/str/ft_strlcpy.c
index 1d089fa..86bd60a 100644
--- a/str/ft_strlcpy.c
+++ b/str/ft_strlcpy.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:55:25 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:12:13 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:52:00 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <unistd.h>
 
 /**
  * @brief Copies a string with size limit.
diff --git a/str/ft_strlen.c b/str/ft_strlen.c
index 4c0e9a7..a6db9cf 100644
--- a/str/ft_strlen.c
+++ b/str/ft_strlen.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:56:24 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:12:19 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:34:21 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Computes the length of a string.
@@ -24,6 +24,8 @@ size_t	ft_strlen(const char *s)
 	size_t	i;
 
 	i = 0;
+	if (!s)
+		return (0);
 	while (s[i] != '\0')
 		i++;
 	return (i);
diff --git a/str/ft_strmapi.c b/str/ft_strmapi.c
index 691df40..4a2c463 100644
--- a/str/ft_strmapi.c
+++ b/str/ft_strmapi.c
@@ -6,11 +6,13 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:56:57 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:14:29 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:28:51 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "memory.h"
+#include "str.h"
+#include <stdlib.h>
 
 /**
  * @brief Applies a function to each character of a string.
diff --git a/str/ft_strncmp.c b/str/ft_strncmp.c
index 714b572..78933d5 100644
--- a/str/ft_strncmp.c
+++ b/str/ft_strncmp.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:56:56 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:13:58 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:54:01 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Compares two strings up to a specified number of characters.
diff --git a/str/ft_strnstr.c b/str/ft_strnstr.c
index b5061fa..8949913 100644
--- a/str/ft_strnstr.c
+++ b/str/ft_strnstr.c
@@ -6,11 +6,11 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:57:44 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:12:05 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:54:58 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include <unistd.h>
 
 /**
  * @brief Locates a substring within a string, up to a specified length.
diff --git a/str/ft_strrchr.c b/str/ft_strrchr.c
index 5d06ac9..b53358e 100644
--- a/str/ft_strrchr.c
+++ b/str/ft_strrchr.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 16:58:22 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:13:53 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 17:49:39 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <unistd.h>
 
 /**
  * @brief Locates the last occurrence of a character in a string.
diff --git a/str/ft_strtrim.c b/str/ft_strtrim.c
index 8a1b364..b5ccf5e 100644
--- a/str/ft_strtrim.c
+++ b/str/ft_strtrim.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:55:44 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:09:25 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:26:20 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <stdlib.h>
 
 /**
  * @brief Trims specified characters from the start and end of a string.
diff --git a/str/ft_substr.c b/str/ft_substr.c
index 7129bdf..8c1aecc 100644
--- a/str/ft_substr.c
+++ b/str/ft_substr.c
@@ -6,11 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/09 13:54:42 by rparodi           #+#    #+#             */
-/*   Updated: 2024/10/31 18:10:59 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/01 18:26:29 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-#include "libft.h"
+#include "str.h"
+#include <stdlib.h>
 
 /**
  * @brief Extracts a substring from a string.