add ft_memchr function

ft_memchr.c

@@ -0,0 +1,18 @@
+#include "libft.h"
+
+void	*ft_memchr(const void *s, int c, size_t n)
+{
+	size_t	i;
+	const unsigned char *ptr;
+	
+	i = 0;
+	ptr = (const unsigned char *)s;
+	while (i < n)
+	{
+		if ((unsigned char)c == ptr[i])
+			return ((void*)(ptr+i));
+		i++;
+	}
+
+	return NULL;
+}

ft_strncmp.c

@@ -0,0 +1,6 @@
+#include "libft.h"
+
+// int	ft_strncmp(const char *s1, const char *s2, size_t n)
+// {
+
+// }

libft.h

@@ -88,7 +88,8 @@ void	*ft_memmove(void *dst, const void *src, size_t n);
 */
 size_t	ft_strlcpy(char *dst, const char *src, size_t dstsize);
 
-// size_t	ft_strlcat(char *dst, const char *src, size_t dstsize);
+// TODO
+size_t	ft_strlcat(char *dst, const char *src, size_t dstsize);
 
 /*
 	The ft_toupper() function converts a 
@@ -112,10 +113,20 @@ int	ft_tolower(int c);
 char	*ft_strchr(const char *s, int c);
 
 /*
-	The strrchr() function is identical 
+	The ft_strrchr() function is identical 
 	to strchr() except it locates the 
 	last occurrence of c.
 */
 char	*ft_strrchr(const char *s, int c);
 
+// TODO
+int	ft_strncmp(const char *s1, const char *s2, size_t n);
+
+/*
+	he ft_memchr() function locates the 
+	first occurrence of c (converted to 
+	an unsigned char) in string s.
+*/
+void	*ft_memchr(const void *s, int c, size_t n);
+
 #endif