src/libregexp/rregaux.c

#include "lib9.h"
#include "regexp9.h"
#include "regcomp.h"

extern Relist*
_rrenewemptythread(Relist *lp,	/* _relist to add to */
	Reinst *ip,		/* instruction to add */
	Rune *rsp)		/* pointers to subexpressions */
{
	Relist *p;

	for(p=lp; p->inst; p++){
		if(p->inst == ip){
			if(rsp < p->se.m[0].s.rsp) {
				memset((void *)&p->se, 0, sizeof(p->se));
				p->se.m[0].s.rsp = rsp;
			}
			return 0;
		}
	}
	p->inst = ip;
	memset((void *)&p->se, 0, sizeof(p->se));
	p->se.m[0].s.rsp = rsp;
	(++p)->inst = 0;
	return p;
}