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, 49 insertions, 0 deletions

diff --git a/tests/src/test_atoi.c b/tests/src/test_atoi.c
new file mode 100644
index 0000000..91e4dc4
--- /dev/null
+++ b/tests/src/test_atoi.c
@@ -0,0 +1,49 @@
+#include "libft.h"
+#include "test_utils.h"
+#include <limits.h>
+
+_S_CRASH_I (ft_atoi_null, ft_atoi (NULL))
+_S_CRASH_I (libc_atoi_null, atoi (NULL))
+
+int
+main (void)
+{
+  int i;
+  char buf[64];
+  char label[64];
+
+  srand (time (NULL));
+  _s_section ("ft_atoi");
+  _s_check_both_crash ("atoi NULL", _s_crash_ft_atoi_null,
+                       _s_crash_libc_atoi_null);
+
+  /* edge cases */
+  _s_check_eq_int ("zero", ft_atoi ("0"), atoi ("0"));
+  _s_check_eq_int ("INT_MAX", ft_atoi ("2147483647"), atoi ("2147483647"));
+  _s_check_eq_int ("INT_MIN", ft_atoi ("-2147483648"), atoi ("-2147483648"));
+  _s_check_eq_int ("negative", ft_atoi ("-42"), atoi ("-42"));
+  _s_check_eq_int ("explicit +", ft_atoi ("+42"), atoi ("+42"));
+  _s_check_eq_int ("leading spaces", ft_atoi ("   42"), atoi ("   42"));
+  _s_check_eq_int ("leading tabs", ft_atoi ("\t\n\v\f\r 42"),
+                   atoi ("\t\n\v\f\r 42"));
+  _s_check_eq_int ("trailing chars", ft_atoi ("42abc"), atoi ("42abc"));
+  _s_check_eq_int ("empty string", ft_atoi (""), atoi (""));
+  _s_check_eq_int ("only spaces", ft_atoi ("   "), atoi ("   "));
+  _s_check_eq_int ("only sign", ft_atoi ("-"), atoi ("-"));
+  _s_check_eq_int ("sign then space", ft_atoi ("- 42"), atoi ("- 42"));
+  _s_check_eq_int ("double sign", ft_atoi ("--42"), atoi ("--42"));
+  _s_check_eq_int ("space between", ft_atoi ("4 2"), atoi ("4 2"));
+  _s_check_eq_int ("leading zeros", ft_atoi ("00042"), atoi ("00042"));
+
+  /* randomized */
+  for (i = 0; i < _S_RAND_ITERS; i++)
+    {
+      int v = rand () - RAND_MAX / 2;
+      snprintf (buf, sizeof (buf), "%d", v);
+      snprintf (label, sizeof (label), "random %s", buf);
+      _s_check_eq_int (label, ft_atoi (buf), atoi (buf));
+    }
+
+  _s_print_results ();
+  return (_s_fail != 0);
+}