dtd for bit string

libasn1print/asn1print.c

@@ -849,6 +849,8 @@ asn1print_expr_dtd(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, enum a
 
 	if(TQ_FIRST(&expr->members)) {
 		int extensible = 0;
+		if(expr->expr_type == ASN_BASIC_BIT_STRING)
+			dont_involve_children = 1;
 		printf(" (");
 		TQ_FOR(se, &(expr->members), next) {
 			if(se->expr_type == A1TC_EXTENSIBLE) {
@@ -870,6 +872,8 @@ asn1print_expr_dtd(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, enum a
 					printf("*");
 				else if(se->marker.flags)
 					printf("?");
+				else if(expr->expr_type == ASN_BASIC_BIT_STRING)
+					printf("?");
 			}
 			if(TQ_NEXT(se, next)
 			&& TQ_NEXT(se, next)->expr_type != A1TC_EXTENSIBLE) {

tests/125-bitstring-constraint-OK.asn1.-X

+<!-- XML DTD generated by asn1c-0.9.22 -->
+
+<!-- ASN.1 module
+ModuleBitStringConstraint { iso org(3) dod(6) internet(1) private(4)
+	enterprise(1) spelio(9363) software(1) asn1c(5) test(1) 125 }
+found in ../tests/125-bitstring-constraint-OK.asn1 -->
+
+<!ELEMENT T (flag1?, flag2?, flag3?)>