110 static const char *walk(struct match *m, const char *start, const char *stop,
196 	const char *stop;  in matcher()  local
211 		stop = string + pmatch[0].rm_eo;  in matcher()
214 		stop = start + strlen(start);  in matcher()
217 	if (stop < start)  in matcher()
228 			for (dp = start+g->mlen-1; dp < stop; ) {  in matcher()
230 				while (dp < stop && charjump[(int)*dp])  in matcher()
233 				if (dp >= stop)  in matcher()
256 			for (dp = start; dp < stop; dp++)  in matcher()
258 				    stop - dp >= g->mlen &&  in matcher()
261 			if (dp == stop)		/* we didn't find g->must */  in matcher()
273 	m->endp = stop;  in matcher()
295 		endp = walk(m, start, stop, gf, gl, true);  in matcher()
311 			endp = walk(m, m->coldp, stop, gf, gl, false);  in matcher()
377 		    stop - m->coldp, &m->mbs, 0);  in matcher()
378 		assert(start <= stop);  in matcher()
409 dissect(struct match *m, const char *start, const char *stop, sopno startst,  in dissect()  argument
426 	AT("diss", start, stop, startst, stopst);  in dissect()
449 			sp += XMBRTOWC(NULL, sp, stop - start, &m->mbs, 0);  in dissect()
458 			sp += XMBRTOWC(NULL, sp, stop - start, &m->mbs, 0);  in dissect()
466 			stp = stop;  in dissect()
472 				tail = walk(m, rest, stop, es, stopst, false);  in dissect()
473 				if (tail == stop)  in dissect()
490 			stp = stop;  in dissect()
496 				tail = walk(m, rest, stop, es, stopst, false);  in dissect()
497 				if (tail == stop)  in dissect()
526 			stp = stop;  in dissect()
532 				tail = walk(m, rest, stop, es, stopst, false);  in dissect()
533 				if (tail == stop)  in dissect()
584 	assert(sp == stop);  in dissect()
592 backref(struct match *m, const char *start, const char *stop, sopno startst,  in backref()  argument
610 	AT("back", start, stop, startst, stopst);  in backref()
618 			if (sp == stop)  in backref()
620 			sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);  in backref()
625 			if (sp == stop)  in backref()
627 			sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);  in backref()
632 			if (sp == stop)  in backref()
635 			sp += XMBRTOWC(&wc, sp, stop - sp, &m->mbs, BADCHAR);  in backref()
685 		if (sp != stop)  in backref()
692 	AT("hard", sp, stop, ss, stopst);  in backref()
704 		assert(stop - m->beginp >= len);  in backref()
705 		if (sp > stop - len)  in backref()
712 		return (backref(m, sp+len, stop, ss+1, stopst, lev, rec));  in backref()
714 		dp = backref(m, sp, stop, ss+1, stopst, lev, rec);  in backref()
717 		return (backref(m, sp, stop, ss+OPND(s)+1, stopst, lev, rec));  in backref()
722 		return (backref(m, sp, stop, ss+1, stopst, lev+1, rec));  in backref()
725 			return (backref(m, sp, stop, ss+1, stopst, lev-1, rec));  in backref()
728 		dp = backref(m, sp, stop, ss-OPND(s)+1, stopst, lev, rec);  in backref()
730 			return (backref(m, sp, stop, ss+1, stopst, lev-1, rec));  in backref()
737 			dp = backref(m, sp, stop, ssub, esub, lev, rec);  in backref()
759 		dp = backref(m, sp, stop, ss+1, stopst, lev, rec);  in backref()
769 		dp = backref(m, sp, stop, ss+1, stopst, lev, rec);  in backref()
789 walk(struct match *m, const char *start, const char *stop, sopno startst,  in walk()  argument
804 	AT("slow", start, stop, startst, stopst);  in walk()
875 		if (EQ(st, empty) || p == stop || clen > (size_t)(stop - p))  in walk()
895 			return (p + XMBRTOWC(NULL, p, stop - p, &m->mbs, 0));  in walk()
908     sopno stop,		/* state after stop state within strip */  in step()  argument
920 	for (pc = start, INIT(here, pc); pc != stop; pc++, INC(here)) {  in step()
924 			assert(pc == stop-1);  in step()
1047 at(struct match *m, const char *title, const char *start, const char *stop,  in at()  argument
1054 	(void) printf("%s ", pchar(*stop));  in at()