Initial commit: libft Part 1 with tests and documentation

Reimplements 24 libc functions with Doxygen-documented header
and test suite comparing against libc.

1 files changed, 7 insertions, 0 deletions

diff --git a/ft_isdigit.c b/ft_isdigit.c
new file mode 100644
index 0000000..43de53f
--- /dev/null
+++ b/ft_isdigit.c
@@ -0,0 +1,7 @@
+#include "libft.h"
+
+int
+ft_isdigit (int c)
+{
+  return (c >= '0' && c <= '9');
+}