255     char *tz = NULL;  in tzset()  local
261 		tz = e + 3;  in tzset()
265     if (tz != NULL) {  in tzset()
272 	if (!IsAlpha(tz[0]) || !IsAlpha(tz[1]) || !IsAlpha(tz[2]))   in tzset()
274 	zone = tz; tz += 3;  in tzset()
277 	if ( *tz ) {  in tzset()
279 	    if ( *tz == '+' || *tz == '-' ) {  in tzset()
280 		if (*tz == '-') sign = -1;  in tzset()
281 		tz++;  in tzset()
283 	    if (!IsDigit(tz[0]))  in tzset()
285 	    hour = *tz++ - '0';  in tzset()
286 	    if (IsDigit(tz[0]))  in tzset()
287 		hour = hour * 10 + *tz++ - '0';  in tzset()
289 	    if (tz[0] == ':' && IsDigit(tz[1]) && IsDigit(tz[2])) {  in tzset()
290 		minute = ((tz[1] - '0') * 10 + tz[2] - '0') * sign;  in tzset()
291 		tz += 3;  in tzset()
292 		if (tz[0] == ':' && IsDigit(tz[1]) && IsDigit(tz[2])) {  in tzset()
293 		    second = ((tz[1] - '0') * 10 + tz[2] - '0') * sign;  in tzset()
294 		    tz += 3;  in tzset()
298 	    if ( *tz && IsAlpha(tz[0]) && IsAlpha(tz[1]) && IsAlpha(tz[2])) {  in tzset()
301 		azone = tz; tz += 3;  in tzset()
304 		if ( *tz == '+' || *tz == '-' ) {  in tzset()
305 		    if (*tz == '-') asign = -1;  in tzset()
306 		    tz++;  in tzset()
308 		if (IsDigit(tz[0])) {  in tzset()
309 		    ahour = *tz++ - '0';  in tzset()
310 		    if (IsDigit(tz[0]))  in tzset()
311 			ahour = ahour * 10 + *tz++ - '0';  in tzset()
313 		    if (tz[0] == ':' && IsDigit(tz[1]) && IsDigit(tz[2])) {  in tzset()
314 			aminute = ((tz[1] - '0') * 10 + tz[2] - '0') * asign;  in tzset()
315 			tz += 3;  in tzset()
316 			if (tz[0] == ':' && IsDigit(tz[1]) && IsDigit(tz[2])) {  in tzset()
317 			    asecond = ((tz[1] - '0') * 10 + tz[2] - '0')*asign;  in tzset()
318 			    tz += 3;  in tzset()
321 		} else if (*tz == '\0')  in tzset()
368     struct timezone tz;  in __gh_timezone()
369     gettimeofday(&ignore,&tz);  in __gh_timezone()
370     return(tz.tz_minuteswest);  in __gh_timezone()