From 4abab5ad6c8465a7528ccdd5f49367da05f78bbd Mon Sep 17 00:00:00 2001 From: Vladimir Azarov Date: Tue, 1 Oct 2024 15:47:05 +0200 Subject: Initial version --- src/time/asctime_r.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 src/time/asctime_r.c (limited to 'src/time/asctime_r.c') diff --git a/src/time/asctime_r.c b/src/time/asctime_r.c new file mode 100644 index 0000000..26809ca --- /dev/null +++ b/src/time/asctime_r.c @@ -0,0 +1,28 @@ +#include +#include +#include +#include "locale_impl.h" +#include "atomic.h" + +char *__asctime_r(const struct tm *restrict tm, char *restrict buf) +{ + if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n", + __nl_langinfo_l(ABDAY_1+tm->tm_wday, C_LOCALE), + __nl_langinfo_l(ABMON_1+tm->tm_mon, C_LOCALE), + 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..). + */ + a_crash(); + } + return buf; +} + +weak_alias(__asctime_r, asctime_r); -- cgit v1.2.3