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, 67 insertions, 0 deletions

diff --git a/src/ft_split.c b/src/ft_split.c
new file mode 100644
index 0000000..bb51c85
--- /dev/null
+++ b/src/ft_split.c
@@ -0,0 +1,67 @@
+#include "libft.h"
+#include <stdlib.h>
+
+static size_t
+_s_count_words (char const *s, char c)
+{
+  size_t count;
+
+  count = 0;
+  while (*s)
+    {
+      while (*s == c)
+        s++;
+      if (*s)
+        {
+          count++;
+          while (*s && *s != c)
+            s++;
+        }
+    }
+  return (count);
+}
+
+static void
+_s_free_all (char **arr, size_t n)
+{
+  size_t i;
+
+  i = 0;
+  while (i < n)
+    free (arr[i++]);
+  free (arr);
+}
+
+char **
+ft_split (char const *s, char c)
+{
+  size_t count;
+  char **arr;
+  size_t i;
+
+  count = _s_count_words (s, c);
+  arr = malloc ((count + 1) * sizeof (char *));
+  if (!arr)
+    return (NULL);
+  i = 0;
+  while (*s)
+    {
+      while (*s == c)
+        s++;
+      if (*s)
+        {
+          const char *start = s;
+          while (*s && *s != c)
+            s++;
+          arr[i] = ft_substr (start, 0, s - start);
+          if (!arr[i])
+            {
+              _s_free_all (arr, i);
+              return (NULL);
+            }
+          i++;
+        }
+    }
+  arr[i] = NULL;
+  return (arr);
+}