docs(char): moving the actual documentation on the header

- The documentation on the header allow u to see on the files where the
header is inclued

char/ft_isalnum.c

@@ -6,18 +6,12 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 12:47:28 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/04 18:12:52 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:01:38 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "char.h"
 
-/**
- * @brief Check if the character is alpha-numeric
- *
- * @param c the character
- * @return the character if alphanumeric or 0 if not
- */
 int	ft_isalnum(int c)
 {
 	if (ft_isalpha(c) || ft_isdigit(c))

char/ft_isalpha.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 11:58:37 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/04 18:13:06 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:03:14 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief Check if the character is alpha
- *
- * @param c the character
- * @return the character if alpha or 0 if not
- */
 int	ft_isalpha(int c)
 {
 	if ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))

char/ft_isascii.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 14:04:26 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/05 10:40:03 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:01:13 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief Check if the character is in the ascii table
- *
- * @param c the character
- * @return the character if in the ascii table or 0 if not
- */
 int	ft_isascii(int c)
 {
 	if (c == 0)

char/ft_isdigit.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 12:44:28 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/04 18:13:17 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:00:16 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief Check if the character is alpha numeric
- *
- * @param c the character
- * @return the character if numeric or 0 if not
- */
 int	ft_isdigit(int c)
 {
 	if (c >= '0' && c <= '9')

char/ft_isprint.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/06 14:06:53 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/05 10:44:13 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:03:14 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief Check if the character is printable
- *
- * @param c the character
- * @return the character if can be print or 0 if not
- */
 int	ft_isprint(int c)
 {
 	if (c >= 32 && c <= 126)

char/ft_tolower.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 10:38:54 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/04 11:42:13 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:00:45 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief convert the upper case to lower case
- *
- * @param c the character
- * @return the character to lower case if is on upper
- */
 int	ft_tolower(int c)
 {
 	if (c >= 'A' && c <= 'Z')

char/ft_toupper.c

@@ -6,16 +6,10 @@
 /*   By: rparodi <marvin@42.fr>                     +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/07 10:44:26 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/04 11:41:57 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:00:45 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
-/**
- * @brief convert the lower case to upper case
- *
- * @param c the character
- * @return the character to upper case if is on lower
- */
 int	ft_toupper(int c)
 {
 	if (c >= 'a' && c <= 'z')

includes/char.h

@@ -6,19 +6,67 @@
 /*   By: rparodi <rparodi@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/10/31 14:54:04 by rparodi           #+#    #+#             */
-/*   Updated: 2025/09/01 18:26:44 by rparodi          ###   ########.fr       */
+/*   Updated: 2025/09/05 16:06:07 by rparodi          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #ifndef CHAR_H
 # define CHAR_H
 
+/**
+ * @brief Check if the character is alpha-numeric
+ *
+ * @param c the character
+ * @return 1 if the char is alpha-numeric overwise 0
+ */
 int	ft_isalnum(int c);
+
+/**
+ * @brief Check if the character is alpha
+ *
+ * @param c the character
+ * @return 1 if the char is alphabetic overwise 0
+ */
 int	ft_isalpha(int c);
+
+/**
+ * @brief Check if the character is in the ascii table
+ *
+ * @param c the character
+ * @return 1 if the char is ascii overwise 0
+ */
 int	ft_isascii(int c);
+
+/**
+ * @brief Check if the character is numeric
+ *
+ * @param c the character
+ * @return 1 if the char is numeric overwise 0
+ */
 int	ft_isdigit(int c);
+
+/**
+ * @brief Check if the character is printable
+ *
+ * @param c the character
+ * @return 1 if the char is printable 0
+ */
 int	ft_isprint(int c);
+
+/**
+ * @brief convert the upper case to lower case
+ *
+ * @param c the character
+ * @return the character to lower case if is on upper
+ */
 int	ft_tolower(int c);
+
+/**
+ * @brief convert the lower case to upper case
+ *
+ * @param c the character
+ * @return the character to upper case if is on lower
+ */
 int	ft_toupper(int c);
 
 #endif