543 eqn_box_alloc(struct eqn_node *ep, struct eqn_box *parent)  in eqn_box_alloc()  argument
548 	bp->parent = parent;  in eqn_box_alloc()
549 	bp->parent->args++;  in eqn_box_alloc()
553 	if (NULL != parent->first) {  in eqn_box_alloc()
554 		parent->last->next = bp;  in eqn_box_alloc()
555 		bp->prev = parent->last;  in eqn_box_alloc()
557 		parent->first = bp;  in eqn_box_alloc()
559 	parent->last = bp;  in eqn_box_alloc()
571 	enum eqn_post pos, struct eqn_box *parent)  in eqn_box_makebinary()  argument
575 	assert(NULL != parent->last);  in eqn_box_makebinary()
576 	b = parent->last;  in eqn_box_makebinary()
577 	if (parent->last == parent->first)  in eqn_box_makebinary()
578 		parent->first = NULL;  in eqn_box_makebinary()
579 	parent->args--;  in eqn_box_makebinary()
580 	parent->last = b->prev;  in eqn_box_makebinary()
582 	newb = eqn_box_alloc(ep, parent);  in eqn_box_makebinary()
589 	b->parent = newb;  in eqn_box_makebinary()
696 eqn_parse(struct eqn_node *ep, struct eqn_box *parent)  in eqn_parse()  argument
707 	assert(parent != NULL);  in eqn_parse()
755 		if (parent->last == NULL) {  in eqn_parse()
758 			cur = eqn_box_alloc(ep, parent);  in eqn_parse()
762 		parent = eqn_box_makebinary(ep, EQNPOS_NONE, parent);  in eqn_parse()
763 		parent->type = EQN_LISTONE;  in eqn_parse()
764 		parent->expectargs = 1;  in eqn_parse()
802 			parent->top = mandoc_strdup(sym);  in eqn_parse()
805 			parent->bottom = mandoc_strdup(sym);  in eqn_parse()
810 		parent = parent->parent;  in eqn_parse()
828 		while (parent->args == parent->expectargs)  in eqn_parse()
829 			parent = parent->parent;  in eqn_parse()
835 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
836 		parent->type = EQN_LISTONE;  in eqn_parse()
837 		parent->expectargs = 1;  in eqn_parse()
840 			parent->font = EQNFONT_FAT;  in eqn_parse()
843 			parent->font = EQNFONT_ROMAN;  in eqn_parse()
846 			parent->font = EQNFONT_ITALIC;  in eqn_parse()
849 			parent->font = EQNFONT_BOLD;  in eqn_parse()
873 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
874 		parent->type = EQN_LISTONE;  in eqn_parse()
875 		parent->expectargs = 1;  in eqn_parse()
876 		parent->size = size;  in eqn_parse()
887 		if (parent->last == NULL) {  in eqn_parse()
890 			cur = eqn_box_alloc(ep, parent);  in eqn_parse()
895 		if (EQN_TOK_SUP == tok && parent->pos == EQNPOS_SUB) {  in eqn_parse()
896 			parent->expectargs = 3;  in eqn_parse()
897 			parent->pos = EQNPOS_SUBSUP;  in eqn_parse()
900 		if (EQN_TOK_TO == tok && parent->pos == EQNPOS_FROM) {  in eqn_parse()
901 			parent->expectargs = 3;  in eqn_parse()
902 			parent->pos = EQNPOS_FROMTO;  in eqn_parse()
921 		parent = eqn_box_makebinary(ep, pos, parent);  in eqn_parse()
924 		while (parent->args == parent->expectargs)  in eqn_parse()
925 			parent = parent->parent;  in eqn_parse()
931 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
932 		parent->type = EQN_SUBEXPR;  in eqn_parse()
933 		parent->pos = EQNPOS_SQRT;  in eqn_parse()
934 		parent->expectargs = 1;  in eqn_parse()
942 		if (parent->last == NULL) {  in eqn_parse()
945 			cur = eqn_box_alloc(ep, parent);  in eqn_parse()
949 		while (EQN_SUBEXPR == parent->type)  in eqn_parse()
950 			parent = parent->parent;  in eqn_parse()
951 		parent = eqn_box_makebinary(ep, EQNPOS_OVER, parent);  in eqn_parse()
960 		for (cur = parent; cur != NULL; cur = cur->parent)  in eqn_parse()
970 		parent = cur;  in eqn_parse()
981 				parent->right = mandoc_strdup(sym);  in eqn_parse()
984 				parent->right = mandoc_strdup(sym);  in eqn_parse()
986 				parent->right = mandoc_strndup(start, sz);  in eqn_parse()
988 		parent = parent->parent;  in eqn_parse()
989 		if (EQN_TOK_BRACE_CLOSE == tok && parent &&  in eqn_parse()
990 		    (parent->type == EQN_PILE ||  in eqn_parse()
991 		     parent->type == EQN_MATRIX))  in eqn_parse()
992 			parent = parent->parent;  in eqn_parse()
994 		while (parent->type == EQN_LISTONE &&  in eqn_parse()
995 		    parent->args == parent->expectargs)  in eqn_parse()
996 			parent = parent->parent;  in eqn_parse()
1005 		while (parent->args == parent->expectargs)  in eqn_parse()
1006 			parent = parent->parent;  in eqn_parse()
1013 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
1014 		parent->type = EQN_LIST;  in eqn_parse()
1018 				parent->left = mandoc_strdup(sym);  in eqn_parse()
1021 				parent->left = mandoc_strdup(sym);  in eqn_parse()
1023 				parent->left = mandoc_strndup(start, sz);  in eqn_parse()
1033 		while (parent->args == parent->expectargs)  in eqn_parse()
1034 			parent = parent->parent;  in eqn_parse()
1035 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
1036 		parent->type = EQN_PILE;  in eqn_parse()
1037 		parent->expectargs = 1;  in eqn_parse()
1040 		for (cur = parent; cur != NULL; cur = cur->parent)  in eqn_parse()
1048 		parent = eqn_box_alloc(ep, cur);  in eqn_parse()
1049 		parent->type = EQN_LIST;  in eqn_parse()
1052 		while (parent->args == parent->expectargs)  in eqn_parse()
1053 			parent = parent->parent;  in eqn_parse()
1054 		parent = eqn_box_alloc(ep, parent);  in eqn_parse()
1055 		parent->type = EQN_MATRIX;  in eqn_parse()
1056 		parent->expectargs = 1;  in eqn_parse()
1071 		while (parent->args == parent->expectargs)  in eqn_parse()
1072 			parent = parent->parent;  in eqn_parse()
1073 		cur = eqn_box_alloc(ep, parent);  in eqn_parse()
1089 		while (parent->type == EQN_LISTONE &&  in eqn_parse()
1090 		    parent->args == parent->expectargs)  in eqn_parse()
1091 			parent = parent->parent;  in eqn_parse()