+ int rc;
+ MatchingRule *mr;
+
+ switch( usage & SLAP_MR_TYPE_MASK ) {
+ case SLAP_MR_NONE:
+ case SLAP_MR_EQUALITY:
+ mr = ad->ad_type->sat_equality;
+ break;
+ case SLAP_MR_ORDERING:
+ mr = ad->ad_type->sat_ordering;
+ break;
+ case SLAP_MR_SUBSTR:
+ mr = ad->ad_type->sat_substr;
+ break;
+ case SLAP_MR_EXT:
+ default:
+ assert( 0 );
+ *text = "internal error";
+ return LDAP_OTHER;
+ }
+
+ if( mr == NULL ) {
+ *text = "inappropriate matching request";
+ return LDAP_INAPPROPRIATE_MATCHING;
+ }
+
+ if( mr->smr_syntax == NULL ) {
+ *text = "no assertion syntax";
+ return LDAP_INVALID_SYNTAX;
+ }
+
+ if( ! mr->smr_syntax->ssyn_validate ) {
+ *text = "no syntax validator";
+ return LDAP_INVALID_SYNTAX;
+ }