diff --git a/Makefile b/Makefile
index 97a46ba..c98e858 100644
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 #    By: adjoly <adjoly@student.42.fr>              +#+  +:+       +#+         #
 #                                                 +#+#+#+#+#+   +#+            #
 #    Created: 2023/11/01 11:03:22 by adjoly            #+#    #+#              #
-#    Updated: 2023/11/08 12:14:33 by adjoly           ###   ########.fr        #
+#    Updated: 2023/11/08 17:07:14 by adjoly           ###   ########.fr        #
 #                                                                              #
 # **************************************************************************** #
 
@@ -36,11 +36,13 @@ SRCS = ft_atoi.c \
 		ft_strlcat.c \
 		ft_strjoin.c \
 		ft_strncmp.c \
-		ft_strchr.c \
 		ft_itoa.c \
 		ft_calloc.c \
 		ft_memchr.c \
 		ft_memcmp.c \
+		ft_strchr.c \
+		ft_strrchr.c \
+		ft_strnstr.c \
 
 OBJS = $(SRCS:.c=.o)
 
@@ -51,9 +53,9 @@ HEADER = libft.h
 $(NAME): $(OBJS)
 	ar -rcs	$(NAME) $(OBJS)
 
-so:
-	$(CC) -nostartfiles -fPIC $(CFLAGS) $(SRCS)
-	gcc -nostartfiles -shared -o libft.so $(OBJS)
+# so:
+	# $(CC) -nostartfiles -fPIC $(CFLAGS) $(SRCS)
+	# gcc -nostartfiles -shared -o libft.so $(OBJS)
 
 %.o: %.c
 	$(CC) $(FLAGS) -I $(HEADER) $< -c -o $@
diff --git a/ft_memchr.c b/ft_memchr.c
index 3483542..c6c91ff 100644
--- a/ft_memchr.c
+++ b/ft_memchr.c
@@ -6,12 +6,14 @@
 /*   By: adjoly <adjoly@student.42.fr>              +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/05 14:52:53 by adjoly            #+#    #+#             */
-/*   Updated: 2023/11/08 11:59:58 by adjoly           ###   ########.fr       */
+/*   Updated: 2023/11/08 14:52:06 by adjoly           ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
 #include "libft.h"
 
+#define BUFFER_SIZE 10
+
 void	*ft_memchr(const void *s, int c, size_t n)
 {
 	size_t	i;
diff --git a/ft_strchr.c b/ft_strchr.c
index 4d96690..2a967e2 100644
--- a/ft_strchr.c
+++ b/ft_strchr.c
@@ -6,17 +6,18 @@
 /*   By: adjoly <adjoly@student.42.fr>              +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/01 15:45:18 by adjoly            #+#    #+#             */
-/*   Updated: 2023/11/08 12:17:21 by adjoly           ###   ########.fr       */
+/*   Updated: 2023/11/08 14:31:21 by adjoly           ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
+#include "libft.h"
+
 char	*ft_strchr(const char *s, int c)
 {
-	int	i;
+	size_t	len_s;
+	char	*result;
 
-	i = 0;
-	while (s[i])
-	{
-		
-	}
+	len_s = ft_strlen(s);
+	result = ft_memchr(s, c, len_s);
+	return (result);
 }
diff --git a/libft.h b/libft.h
index ad81796..1ccdd3a 100644
--- a/libft.h
+++ b/libft.h
@@ -6,7 +6,7 @@
 /*   By: adjoly <adjoly@student.42.fr>              +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2023/11/01 10:06:03 by adjoly            #+#    #+#             */
-/*   Updated: 2023/11/08 12:14:58 by adjoly           ###   ########.fr       */
+/*   Updated: 2023/11/08 17:08:26 by adjoly           ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -46,5 +46,7 @@ char	*ft_itoa(int n);
 void	*ft_memmove(void *dest, const void *src, size_t n);
 void	*ft_memchr(const void *s, int c, size_t n);
 int		ft_memcmp(const void *s1, const void *s2, size_t n);
+char	*ft_strrchr(const char *s, int c);
+char	*ft_strnstr(const char *big, const char *little, size_t len);
 
 #endif
\ No newline at end of file
diff --git a/libft.so b/libft.so
deleted file mode 100755
index c4036e6..0000000
Binary files a/libft.so and /dev/null differ