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, 9 insertions, 0 deletions

diff --git a/ft_tolower.c b/ft_tolower.c
new file mode 100644
index 0000000..52fbc94
--- /dev/null
+++ b/ft_tolower.c
@@ -0,0 +1,9 @@
+#include "libft.h"
+
+int
+ft_tolower (int c)
+{
+  if (c >= 'A' && c <= 'Z')
+    return (c + ('a' - 'A'));
+  return (c);
+}