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