Restructure project layout and clean up test suite

Move sources to src/, header to inc/, and tests to tests/src/.
Update Makefiles and .gitignore for the new layout.

Refactor test harness: add crash-wrapper macros (_S_CRASH,
_S_CRASH_I, _S_CRASH_V, _S_CRASH_BUF) replacing 58 hand-written
wrappers, add shared _s_test_int_range helper eliminating duplicate
_s_test_func, add _S_RAND_ITERS constant, move srand() to main()
in all test binaries, and add Doxygen comments to test_utils.h.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/ft_memcpy.c b/src/ft_memcpy.c
new file mode 100644
index 0000000..26c4f76
--- /dev/null
+++ b/src/ft_memcpy.c
@@ -0,0 +1,16 @@
+#include "libft.h"
+
+void *
+ft_memcpy (void *dest, const void *src, size_t n)
+{
+  unsigned char *dst_bytes;
+  const unsigned char *src_bytes;
+
+  if (!dest && !src)
+    return (dest);
+  dst_bytes = dest;
+  src_bytes = src;
+  while (n--)
+    *dst_bytes++ = *src_bytes++;
+  return (dest);
+}