Function xmlSchemaCheckCOSNSSubset

ThirdParty/libxml2/vtklibxml2/xmlschemas.c:13926–13987

* xmlSchemaIsWildcardNsConstraintSubset: * @ctxt: the schema parser context * @sub: the first wildcard * @super: the second wildcard * * Schema Component Constraint: Wildcard Subset (cos-ns-subset) * * Returns 0 if the namespace constraint of @sub is an intensional * subset of @super, 1 otherwise. */

 * subset of @super, 1 otherwise.
 */
static int
xmlSchemaCheckCOSNSSubset(xmlSchemaWildcardPtr sub,
			  xmlSchemaWildcardPtr super)
{
    /*
    * 1 super must be any.
    */
    if (super->any)
	return (0);
    /*
    * 2.1 sub must be a pair of not and a namespace name or `absent`.
    * 2.2 super must be a pair of not and the same value.
    */
    if ((sub->negNsSet != NULL) &&
	(super->negNsSet != NULL) &&
	(sub->negNsSet->value == super->negNsSet->value))
	return (0);
    /*
    * 3.1 sub must be a set whose members are either namespace names or `absent`.
    */
    if (sub->nsSet != NULL) {
	/*
	* 3.2.1 super must be the same set or a superset thereof.
	*/
	if (super->nsSet != NULL) {
	    xmlSchemaWildcardNsPtr cur, curB;
	    int found = 0;

	    cur = sub->nsSet;
	    while (cur != NULL) {
		found = 0;
		curB = super->nsSet;
		while (curB != NULL) {
		    if (cur->value == curB->value) {
			found = 1;
			break;
		    }
		    curB = curB->next;
		}
		if (!found)
		    return (1);
		cur = cur->next;
	    }
	    if (found)
		return (0);
	} else if (super->negNsSet != NULL) {
	    xmlSchemaWildcardNsPtr cur;
	    /*
	    * 3.2.2 super must be a pair of not and a namespace name or
	    * `absent` and that value must not be in sub's set.
	    */
	    cur = sub->nsSet;
	    while (cur != NULL) {
		if (cur->value == super->negNsSet->value)
		    return (1);
		cur = cur->next;
	    }
	    return (0);