Implement libft Part 2 with tests

Add ft_substr, ft_strjoin, ft_strtrim, ft_split, ft_itoa,
ft_strmapi, ft_striteri, ft_putchar_fd, ft_putstr_fd,
ft_putendl_fd, ft_putnbr_fd.

1 files changed, 19 insertions, 0 deletions

diff --git a/src/ft_strjoin.c b/src/ft_strjoin.c
new file mode 100644
index 0000000..f6e22f0
--- /dev/null
+++ b/src/ft_strjoin.c
@@ -0,0 +1,19 @@
+#include "libft.h"
+#include <stdlib.h>
+
+char *
+ft_strjoin (char const *s1, char const *s2)
+{
+  size_t len1;
+  size_t len2;
+  char *join;
+
+  len1 = ft_strlen (s1);
+  len2 = ft_strlen (s2);
+  join = malloc (len1 + len2 + 1);
+  if (!join)
+    return (NULL);
+  ft_memcpy (join, s1, len1);
+  ft_memcpy (join + len1, s2, len2 + 1);
+  return (join);
+}