191   const char *tz = *tzp;  in parse_offset()  local
193       && (*tz == '\0' || (*tz != '+' && *tz != '-' && !isdigit (*tz))))  in parse_offset()
197   if (*tz == '-' || *tz == '+')  in parse_offset()
198     sign = *tz++ == '-' ? 1 : -1;  in parse_offset()
201   *tzp = tz;  in parse_offset()
207   if (sscanf (tz, "%hu%n:%hu%n:%hu%n",  in parse_offset()
221   *tzp = tz + consumed;  in parse_offset()
231   const char *tz = *tzp;  in parse_rule()  local
236   tz += *tz == ',';  in parse_rule()
239   if (*tz == 'J' || isdigit (*tz))  in parse_rule()
242       tzr->type = *tz == 'J' ? J1 : J0;  in parse_rule()
243       if (tzr->type == J1 && !isdigit (*++tz))  in parse_rule()
245       unsigned long int d = strtoul (tz, &end, 10);  in parse_rule()
246       if (end == tz || d > 365)  in parse_rule()
251       tz = end;  in parse_rule()
253   else if (*tz == 'M')  in parse_rule()
257       if (sscanf (tz, "M%hu.%hu.%hu%n",  in parse_rule()
262       tz += consumed;  in parse_rule()
264   else if (*tz == '\0')  in parse_rule()
289   if (*tz != '\0' && *tz != '/' && *tz != ',')  in parse_rule()
291   else if (*tz == '/')  in parse_rule()
295       ++tz;  in parse_rule()
296       if (*tz == '\0')  in parse_rule()
298       negative = *tz == '-';  in parse_rule()
299       tz += negative;  in parse_rule()
305       sscanf (tz, "%hu%n:%hu%n:%hu%n",  in parse_rule()
307       tz += consumed;  in parse_rule()
315   *tzp = tz;  in parse_rule()
321 __tzset_parse_tz (const char *tz)  in __tzset_parse_tz()  argument
328   if (parse_tzname (&tz, 0) && parse_offset (&tz, 0))  in __tzset_parse_tz()
331       if (*tz != '\0')  in __tzset_parse_tz()
333 	  if (parse_tzname (&tz, 1))  in __tzset_parse_tz()
335 	      parse_offset (&tz, 1);  in __tzset_parse_tz()
336 	      if (*tz == '\0' || (tz[0] == ',' && tz[1] == '\0'))  in __tzset_parse_tz()
351 	  if (parse_rule (&tz, 0))  in __tzset_parse_tz()
352 	    parse_rule (&tz, 1);  in __tzset_parse_tz()
370   const char *tz;  in tzset_internal()  local
377   tz = getenv ("TZ");  in tzset_internal()
378   if (tz && *tz == '\0')  in tzset_internal()
380     tz = "Universal";  in tzset_internal()
385   if (tz && *tz == ':')  in tzset_internal()
386     ++tz;  in tzset_internal()
389   if (old_tz != NULL && tz != NULL && strcmp (tz, old_tz) == 0)  in tzset_internal()
393   if (tz == NULL)  in tzset_internal()
395     tz = TZDEFAULT;  in tzset_internal()
402   old_tz = tz ? __strdup (tz) : NULL;  in tzset_internal()
405   __tzfile_read (tz, 0, NULL);  in tzset_internal()
411   if (tz == NULL || *tz == '\0'  in tzset_internal()
412       || (TZDEFAULT != NULL && strcmp (tz, TZDEFAULT) == 0))  in tzset_internal()
423   __tzset_parse_tz (tz);  in tzset_internal()