scc

 1int
 2main(void)
 3{
 4	static char *p = "\xe2\x80\x9c";
 5	unsigned n = 0;
 6
 7	for (; *p; p++) {
 8		n <<= 1;
 9		if ((unsigned char)*p >= ' ' && (unsigned char)*p != 0x7f)
10			n |= 1;
11	}
12
13	if (n != 7)
14		return 1;
15
16	return 0;
17}