ref: 4f6b84ae2b0ddb9b0ed54470606262224148855f
dir: /src/libc/time/localtime.c/
#include <string.h> #include <time.h> #include "../libc.h" #undef localtime static time_t gmtoff(char *tz) { for (struct tzone *t = tzones; t->name; t++) if (!strcmp(t->name, tz)) return t->gmtoff; return 0; } struct tm * localtime(const time_t *timep) { struct tm *tm; time_t t; int yday; static int first = 1; t = *timep; tm = gmtime(&t); yday = tm->tm_yday; if (first) { _tzset(); if (_tzstdoff == -1) _tzstdoff = gmtoff(_tzname[0]); if (_tzdstoff == -1) _tzdstoff = gmtoff(_tzname[1]); } first = 0; tm->tm_gmtoff = _tzstdoff; tm->tm_zone = _tzname[0]; tm->tm_isdst = 0; if (_tzjulian && yday+1 < 60 || FEBDAYS(tm->tm_year) < 29) yday++; if (yday >= _tzstart && yday <= _tzend && tm->tm_hour >= 2) { tm->tm_gmtoff = _tzdstoff; tm->tm_zone = _tzname[1]; tm->tm_isdst = 1; } t += tm->tm_gmtoff; tm = gmtime(&t); return tm; }