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-rw-r--r--time/tst-strftime.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/time/tst-strftime.c b/time/tst-strftime.c
new file mode 100644
index 0000000..1feb741
--- /dev/null
+++ b/time/tst-strftime.c
@@ -0,0 +1,74 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+
+static struct
+{
+ const char *fmt;
+ size_t min;
+ size_t max;
+} tests[] =
+ {
+ { "%2000Y", 2000, 4000 },
+ { "%02000Y", 2000, 4000 },
+ { "%_2000Y", 2000, 4000 },
+ { "%-2000Y", 2000, 4000 },
+ };
+#define ntests (sizeof (tests) / sizeof (tests[0]))
+
+
+static int
+do_test (void)
+{
+ size_t cnt;
+ int result = 0;
+
+ time_t tnow = time (NULL);
+ struct tm *now = localtime (&tnow);
+
+ for (cnt = 0; cnt < ntests; ++cnt)
+ {
+ size_t size = 0;
+ int res;
+ char *buf = NULL;
+
+ do
+ {
+ size += 500;
+ buf = (char *) realloc (buf, size);
+ if (buf == NULL)
+ {
+ puts ("out of memory");
+ exit (1);
+ }
+
+ res = strftime (buf, size, tests[cnt].fmt, now);
+ if (res != 0)
+ break;
+ }
+ while (size < tests[cnt].max);
+
+ if (res == 0)
+ {
+ printf ("%Zu: %s: res == 0 despite size == %Zu\n",
+ cnt, tests[cnt].fmt, size);
+ result = 1;
+ }
+ else if (size < tests[cnt].min)
+ {
+ printf ("%Zu: %s: size == %Zu was enough\n",
+ cnt, tests[cnt].fmt, size);
+ result = 1;
+ }
+ else
+ printf ("%Zu: %s: size == %Zu: OK\n", cnt, tests[cnt].fmt, size);
+
+ free (buf);
+ }
+
+ return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"