github.com/afumu/libc@v0.0.6/musl/src/time/asctime_r.c (about)

     1  #include <time.h>
     2  #include <stdio.h>
     3  #include <langinfo.h>
     4  #include "locale_impl.h"
     5  #include "atomic.h"
     6  
     7  char *__asctime_r(const struct tm *restrict tm, char *restrict buf)
     8  {
     9  	if (snprintf(buf, 26, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
    10  		__nl_langinfo_l(ABDAY_1+tm->tm_wday, C_LOCALE),
    11  		__nl_langinfo_l(ABMON_1+tm->tm_mon, C_LOCALE),
    12  		tm->tm_mday, tm->tm_hour,
    13  		tm->tm_min, tm->tm_sec,
    14  		1900 + tm->tm_year) >= 26)
    15  	{
    16  		/* ISO C requires us to use the above format string,
    17  		 * even if it will not fit in the buffer. Thus asctime_r
    18  		 * is _supposed_ to crash if the fields in tm are too large.
    19  		 * We follow this behavior and crash "gracefully" to warn
    20  		 * application developers that they may not be so lucky
    21  		 * on other implementations (e.g. stack smashing..).
    22  		 */
    23  		a_crash();
    24  	}
    25  	return buf;
    26  }
    27  
    28  weak_alias(__asctime_r, asctime_r);