375 		const char *rest;  in parse_long_opt()  local
381 		rest = skip_prefix(arg, options->long_name);  in parse_long_opt()
383 			if (!rest)  in parse_long_opt()
385 			if (*rest == '=')  in parse_long_opt()
387 			if (*rest)  in parse_long_opt()
392 		if (!rest) {  in parse_long_opt()
400 				rest = skip_prefix(arg, options->long_name + 3);  in parse_long_opt()
401 				if (rest) {  in parse_long_opt()
439 			rest = skip_prefix(arg + 3, options->long_name);  in parse_long_opt()
441 			if (!rest && strstarts(options->long_name, arg + 3))  in parse_long_opt()
443 			if (!rest)  in parse_long_opt()
447 		if (*rest) {  in parse_long_opt()
448 			if (*rest != '=')  in parse_long_opt()
450 			p->opt = rest + 1;  in parse_long_opt()