asctime_r: add param check to asctime_r()
#include <nuttx/time.h>
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
/****************************************************************************
* Private Data
****************************************************************************/
@@ -73,6 +81,13 @@ FAR char *asctime_r(FAR const struct tm *tp, FAR char *buf)
{
char tmp[128];
+ if (tp == NULL ||
+ tp->tm_wday >= ARRAY_SIZE(g_wday_name) ||
+ tp->tm_mon >= ARRAY_SIZE(g_mon_name))
+ {
+ return NULL;
+ }
+
snprintf(tmp, sizeof(tmp), "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
g_wday_name[tp->tm_wday], g_mon_name[tp->tm_mon],
tp->tm_mday, tp->tm_hour, tp->tm_min, tp->tm_sec,
