#include <stdlib.h>

#include "extern.h"

int
isattrkey(enum nodeid node, enum attrkey key)
{

	switch (key) {
	case (ATTRKEY_CHOICE):
		switch (node) {
		case (NODE_ARG):
		case (NODE_GROUP):
			return(1);
		default:
			break;
		}
		return(0);
	case (ATTRKEY_OPEN):
	case (ATTRKEY_CLOSE):
		return(node == NODE_MML_MFENCED);
	case (ATTRKEY_ID):
		/* Common to all. */
		return(1);
	case (ATTRKEY_REP):
		switch (node) {
		case (NODE_ARG):
		case (NODE_GROUP):
			return(1);
		default:
			break;
		}
		return(0);
	default:
		break;
	}
	abort();
	return(0);
}

int
isattrval(enum attrkey key, enum attrval val)
{

	switch (val) {
	case (ATTRVAL_OPT):
	case (ATTRVAL_PLAIN):
	case (ATTRVAL_REQ):
		return(key == ATTRKEY_CHOICE);
	case (ATTRVAL_REPEAT):
	case (ATTRVAL_NOREPEAT):
		return(key == ATTRKEY_REP);
	default:
		break;
	}
	abort();
	return(0);
}