From edb265b68ec24e0ae99d0f3303629ef1f0f7eeda Mon Sep 17 00:00:00 2001
From: Jack Halford <jack@crans.org>
Date: Tue, 30 Aug 2016 00:40:33 +0200
Subject: [PATCH] strlen 0 if NULL strng

---
 libftasm/ft_strlen.c | 2 ++
 libftasm/libft.h     | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/libftasm/ft_strlen.c b/libftasm/ft_strlen.c
index 2e73dbb9..cf3f6c5a 100644
--- a/libftasm/ft_strlen.c
+++ b/libftasm/ft_strlen.c
@@ -5,6 +5,8 @@ size_t	ft_strlen(const char *s)
 	int	i;
 
 	i = 0;
+	if (!s)
+		return (0);
 	while (s[i])
 		i++;
 	return (i);
diff --git a/libftasm/libft.h b/libftasm/libft.h
index 7b82a039..87ba3de0 100644
--- a/libftasm/libft.h
+++ b/libftasm/libft.h
@@ -7,6 +7,9 @@
 # define ABS(x) (((x) < 0) ? -(x) : (x))
 # define NEG(x) (((x) < 0) ? 1 : 0)
 # define POS(x) (((x) > 0) ? 1 : 0)
+# define MIN(a, b) ((a) < (b) ? (a) : (b))
+# define MAX(a, b) ((a) > (b) ? (a) : (b))
+# define DIST(a, b) (ABS((a) - (b)))
 
 typedef struct	s_list
 {