initial check-in, version 0.5.0

src/time/__asctime.c

@@ -0,0 +1,27 @@
+#include <time.h>
+#include <stdio.h>
+#include <langinfo.h>
+
+const char *__langinfo(nl_item);
+
+char *__asctime(const struct tm *tm, char *buf)
+{
+	/* FIXME: change __langinfo to __C_langinfo once we have locales */
+	if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
+		__langinfo(ABDAY_1+tm->tm_wday),
+		__langinfo(ABMON_1+tm->tm_mon),
+		tm->tm_mday, tm->tm_hour,
+		tm->tm_min, tm->tm_sec,
+		1900 + tm->tm_year) >= 26)
+	{
+		/* ISO C requires us to use the above format string,
+		 * even if it will not fit in the buffer. Thus asctime_r
+		 * is _supposed_ to crash if the fields in tm are too large.
+		 * We follow this behavior and crash "gracefully" to warn
+		 * application developers that they may not be so lucky
+		 * on other implementations (e.g. stack smashing..).
+		 */
+		*(int*)0 = 0;
+	}
+	return buf;
+}