799 	cset *cs;  in p_bracket()  local
816 	if ((cs = allocset(p)) == NULL) {  in p_bracket()
824 		CHadd(cs, ']');  in p_bracket()
826 		CHadd(cs, '-');  in p_bracket()
828 		p_b_term(p, cs);  in p_bracket()
830 		CHadd(cs, '-');  in p_bracket()
834 		freeset(p, cs);  in p_bracket()
843 			if (CHIN(cs, i) && isalpha(i)) {  in p_bracket()
846 					CHadd(cs, ci);  in p_bracket()
848 		if (cs->multis != NULL)  in p_bracket()
849 			mccase(p, cs);  in p_bracket()
855 			if (CHIN(cs, i))  in p_bracket()
856 				CHsub(cs, i);  in p_bracket()
858 				CHadd(cs, i);  in p_bracket()
860 			CHsub(cs, '\n');  in p_bracket()
861 		if (cs->multis != NULL)  in p_bracket()
862 			mcinvert(p, cs);  in p_bracket()
865 	assert(cs->multis == NULL);		/* xxx */  in p_bracket()
867 	if (nch(p, cs) == 1) {		/* optimize singleton sets */  in p_bracket()
868 		ordinary(p, firstch(p, cs));  in p_bracket()
869 		freeset(p, cs);  in p_bracket()
871 		EMIT(OANYOF, freezeset(p, cs));  in p_bracket()
878 p_b_term(struct parse *p, cset *cs)  in p_b_term()  argument
904 		p_b_cclass(p, cs);  in p_b_term()
913 		p_b_eclass(p, cs);  in p_b_term()
932 			CHadd(cs, i);  in p_b_term()
941 p_b_cclass(struct parse *p, cset *cs)  in p_b_cclass()  argument
963 		CHadd(cs, c);  in p_b_cclass()
965 		MCadd(p, cs, u);  in p_b_cclass()
974 p_b_eclass(struct parse *p, cset *cs)  in p_b_eclass()  argument
979 	CHadd(cs, c);  in p_b_eclass()
1201 	cset *cs;  in allocset()  local
1234 	cs = &p->g->sets[no];  in allocset()
1235 	cs->ptr = p->g->setbits + css*((no)/CHAR_BIT);  in allocset()
1236 	cs->mask = 1 << ((no) % CHAR_BIT);  in allocset()
1237 	cs->hash = 0;  in allocset()
1238 	cs->smultis = 0;  in allocset()
1239 	cs->multis = NULL;  in allocset()
1241 	return(cs);  in allocset()
1257 freeset(struct parse *p, cset *cs)  in freeset()  argument
1264 		CHsub(cs, i);  in freeset()
1265 	if (cs == top-1)	/* recover only the easy case */  in freeset()
1279 freezeset(struct parse *p, cset *cs)  in freezeset()  argument
1281 	uch h = cs->hash;  in freezeset()
1289 		if (cs2->hash == h && cs2 != cs) {  in freezeset()
1292 				if (!!CHIN(cs2, i) != !!CHIN(cs, i))  in freezeset()
1299 		freeset(p, cs);  in freezeset()
1300 		cs = cs2;  in freezeset()
1303 	return((int)(cs - p->g->sets));  in freezeset()
1310 firstch(struct parse *p, cset *cs)  in firstch()  argument
1316 		if (CHIN(cs, i))  in firstch()
1326 nch(struct parse *p, cset *cs)  in nch()  argument
1333 		if (CHIN(cs, i))  in nch()
1342 mcadd( struct parse *p, cset *cs, const char *cp)  in mcadd()  argument
1344 	size_t oldend = cs->smultis;  in mcadd()
1347 	cs->smultis += strlen(cp) + 1;  in mcadd()
1348 	np = realloc(cs->multis, cs->smultis);  in mcadd()
1350 		if (cs->multis)  in mcadd()
1351 			free(cs->multis);  in mcadd()
1352 		cs->multis = NULL;  in mcadd()
1356 	cs->multis = np;  in mcadd()
1358 	llvm_strlcpy(cs->multis + oldend - 1, cp, cs->smultis - oldend + 1);  in mcadd()
1369 mcinvert(struct parse *p, cset *cs)  in mcinvert()  argument
1371 	assert(cs->multis == NULL);	/* xxx */  in mcinvert()
1382 mccase(struct parse *p, cset *cs)  in mccase()  argument
1384 	assert(cs->multis == NULL);	/* xxx */  in mccase()