112 static bool p_ere_exp(struct parse *p, struct branchc *bc);
114 static int p_branch_eat_delim(struct parse *p, struct branchc *bc);
115 static void p_branch_ins_offset(struct parse *p, struct branchc *bc);
116 static void p_branch_fix_tail(struct parse *p, struct branchc *bc);
117 static bool p_branch_empty(struct parse *p, struct branchc *bc);
118 static bool p_branch_do(struct parse *p, struct branchc *bc);
119 static void p_bre_pre_parse(struct parse *p, struct branchc *bc);
120 static void p_bre_post_parse(struct parse *p, struct branchc *bc);
122 static bool p_simp_re(struct parse *p, struct branchc *bc);
388 p_ere_exp(struct parse *p, struct branchc *bc)  in p_ere_exp()  argument
402 	(void)bc;  in p_ere_exp()
643 p_branch_eat_delim(struct parse *p, struct branchc *bc)  in p_branch_eat_delim()  argument
647 	(void)bc;  in p_branch_eat_delim()
659 p_branch_ins_offset(struct parse *p, struct branchc *bc)  in p_branch_ins_offset()  argument
662 	if (bc->nbranch == 0) {  in p_branch_ins_offset()
663 		INSERT(OCH_, bc->start);	/* offset is wrong */  in p_branch_ins_offset()
664 		bc->fwd = bc->start;  in p_branch_ins_offset()
665 		bc->back = bc->start;  in p_branch_ins_offset()
668 	ASTERN(OOR1, bc->back);  in p_branch_ins_offset()
669 	bc->back = THERE();  in p_branch_ins_offset()
670 	AHEAD(bc->fwd);			/* fix previous offset */  in p_branch_ins_offset()
671 	bc->fwd = HERE();  in p_branch_ins_offset()
673 	++bc->nbranch;  in p_branch_ins_offset()
681 p_branch_fix_tail(struct parse *p, struct branchc *bc)  in p_branch_fix_tail()  argument
685 	if (bc->nbranch > 0) {  in p_branch_fix_tail()
686 		AHEAD(bc->fwd);  in p_branch_fix_tail()
687 		ASTERN(O_CH, bc->back);  in p_branch_fix_tail()
698 p_branch_empty(struct parse *p, struct branchc *bc)  in p_branch_empty()  argument
701 	(void)bc;  in p_branch_empty()
712 p_branch_do(struct parse *p, struct branchc *bc)  in p_branch_do()  argument
716 	ate = p_branch_eat_delim(p, bc);  in p_branch_do()
719 	else if ((ate > 1 || (bc->outer && !MORE())) && !p_branch_empty(p, bc))  in p_branch_do()
726 	p_branch_ins_offset(p, bc);  in p_branch_do()
732 p_bre_pre_parse(struct parse *p, struct branchc *bc)  in p_bre_pre_parse()  argument
735 	(void) bc;  in p_bre_pre_parse()
749 p_bre_post_parse(struct parse *p, struct branchc *bc)  in p_bre_post_parse()  argument
753 	if (bc->terminate) {  in p_bre_post_parse()
775 	struct branchc bc;  in p_re()  local
777 	bc.nbranch = 0;  in p_re()
779 		bc.outer = true;  in p_re()
781 		bc.outer = false;  in p_re()
784 		bc.start = HERE();  in p_re()
785 		bc.nchain = 0;  in p_re()
786 		bc.terminate = false;  in p_re()
788 			p->pre_parse(p, &bc);  in p_re()
790 			bc.terminate = p->parse_expr(p, &bc);  in p_re()
791 			++bc.nchain;  in p_re()
794 			p->post_parse(p, &bc);  in p_re()
795 		(void) REQUIRE(p->gnuext || HERE() != bc.start, REG_EMPTY);  in p_re()
797 		if (HERE() == bc.start && !p_branch_empty(p, &bc))  in p_re()
809 		if (!p_branch_do(p, &bc))  in p_re()
814 		p_branch_fix_tail(p, &bc);  in p_re()
823 p_simp_re(struct parse *p, struct branchc *bc)  in p_simp_re()  argument
944 			(void)REQUIRE(bc->nchain == 0, REG_BADRPT);  in p_simp_re()