open62541/src/ua_xml.c

/*
 * ua_xml.c
 *
 *  Created on: 03.05.2014
 *      Author: mrt
 */

#include "ua_xml.h"
#include <fcntl.h> // open, O_RDONLY


UA_Int32 UA_TypedArray_init(UA_TypedArray* p) {
	p->size = -1;
	p->vt = &UA_[UA_INVALIDTYPE];
	p->elements = UA_NULL;
	return UA_SUCCESS;
}
UA_Int32 UA_TypedArray_new(UA_TypedArray** p) {
	UA_alloc((void** )p, sizeof(UA_TypedArray));
	UA_TypedArray_init(*p);
	return UA_SUCCESS;
}
UA_Int32 UA_TypedArray_setType(UA_TypedArray* p, UA_Int32 type) {
	UA_Int32 retval = UA_ERR_INVALID_VALUE;
	if (type >= UA_BOOLEAN && type <= UA_INVALIDTYPE) {
		p->vt = &UA_[type];
		retval = UA_SUCCESS;
	}
	return retval;
}

// FIXME: We might want to have these classes and their methods
// defined in opcua.h via generate_builtin and the plugin-concept
// or in ua_basictypes.c

UA_Int32 UA_NodeSetAlias_init(UA_NodeSetAlias* p) {
	UA_String_init(&(p->alias));
	UA_String_init(&(p->value));
	return UA_SUCCESS;
}
UA_Int32 UA_NodeSetAlias_new(UA_NodeSetAlias** p) {
	UA_alloc((void** )p, sizeof(UA_NodeSetAlias));
	UA_NodeSetAlias_init(*p);
	return UA_SUCCESS;
}
UA_Int32 UA_NodeSetAliases_init(UA_NodeSetAliases* p) {
	p->size = -1;
	p->aliases = UA_NULL;
	return UA_SUCCESS;
}
UA_Int32 UA_NodeSetAliases_new(UA_NodeSetAliases** p) {
	UA_alloc((void** )p, sizeof(UA_NodeSetAliases));
	UA_NodeSetAliases_init(*p);
	return UA_SUCCESS;
}
UA_Int32 UA_NodeSetAliases_println(cstring label, UA_NodeSetAliases *p) {
	UA_Int32 i;
	for (i = 0; i < p->size; i++) {
		UA_NodeSetAlias* a = p->aliases[i];
		printf("%s{addr=%p", label, (void*) a);
		if (a) {
			printf(",alias='%.*s', value='%.*s'", a->alias.length, a->alias.data, a->value.length, a->value.data);
		}
		printf("}\n");
	}
	return UA_SUCCESS;
}

UA_Int32 UA_NodeSet_init(UA_NodeSet* p, UA_UInt32 nsid) {
	Namespace_new(&(p->ns), 100, nsid);
	p->aliases.size = -1;
	p->aliases.aliases = UA_NULL;
	return UA_SUCCESS;
}

UA_Int32 UA_NodeSet_new(UA_NodeSet** p, UA_UInt32 nsid) {
	UA_alloc((void** )p, sizeof(UA_NodeSet));
	UA_NodeSet_init(*p, nsid);
	return UA_SUCCESS;
}
UA_Int32 UA_NodeId_copycstring(cstring src, UA_NodeId* dst, UA_NodeSetAliases* aliases) {
	dst->encodingByte = UA_NODEIDTYPE_FOURBYTE;
	dst->namespace = 0;
	dst->identifier.numeric = 0;
	// FIXME: assumes i=nnnn
	if (src[1] == '=') {
		dst->identifier.numeric = atoi(&src[2]);
	} else {
		UA_Int32 i;
		for (i = 0; i < aliases->size && dst->identifier.numeric == 0; ++i) {
			if (0
					== strncmp((char const*) src, (char const*) aliases->aliases[i]->alias.data,
							aliases->aliases[i]->alias.length)) {
				dst->identifier.numeric = atoi((char const*) &(aliases->aliases[i]->value.data[2]));
			}
		}
	}
	DBG_VERBOSE(printf("UA_NodeId_copycstring src=%s,id=%d\n", src, dst->identifier.numeric));
	return UA_SUCCESS;
}


UA_Int32 UA_ReferenceNode_println(cstring label, UA_ReferenceNode *a) {
	printf("%s{referenceType=%d, target=%d, isInverse=%d}\n",
			label,
			a->referenceTypeId.identifier.numeric,
			a->targetId.nodeId.identifier.numeric,
			a->isInverse);
	return UA_SUCCESS;
}

UA_Int32 UA_ExpandedNodeId_copycstring(cstring src, UA_ExpandedNodeId* dst, UA_NodeSetAliases* aliases) {
	dst->nodeId.encodingByte = UA_NODEIDTYPE_FOURBYTE;
	dst->nodeId.namespace = 0;
	dst->nodeId.identifier.numeric = 0;
	UA_NodeId_copycstring(src, &(dst->nodeId), aliases);
	DBG_VERBOSE(printf("UA_ExpandedNodeId_copycstring src=%s,id=%d\n", src, dst->nodeId.identifier.numeric));
	return UA_SUCCESS;
}

void XML_Stack_init(XML_Stack* p, cstring name) {
	unsigned int i, j;
	p->depth = 0;
	for (i = 0; i < XML_STACK_MAX_DEPTH; i++) {
		p->parent[i].name = UA_NULL;
		p->parent[i].len = 0;
		p->parent[i].activeChild = -1;
		p->parent[i].textAttrib = UA_NULL;
		p->parent[i].textAttribIdx = -1;
		for (j = 0; j < XML_STACK_MAX_CHILDREN; j++) {
			p->parent[i].children[j].name = UA_NULL;
			p->parent[i].children[j].length = -1;
			p->parent[i].children[j].elementHandler = UA_NULL;
			p->parent[i].children[j].type = UA_INVALIDTYPE;
			p->parent[i].children[j].obj = UA_NULL;
		}
	}
	p->parent[0].name = name;
}

char path_buffer[1024];
char * XML_Stack_path(XML_Stack* s) {
	UA_Int32 i;
	char *p = &path_buffer[0];
	for (i = 0; i <= s->depth; i++) {
		strcpy(p, s->parent[i].name);
		p += strlen(s->parent[i].name);
		*p = '/';
		p++;
	}
	*p=0;
	return &path_buffer[0];
}

void XML_Stack_print(XML_Stack* s) {
	printf("%s", XML_Stack_path(s));
}


// FIXME: we might want to calculate textAttribIdx from a string and the information given on the stack
void XML_Stack_handleTextAsElementOf(XML_Stack* p, cstring textAttrib, unsigned int textAttribIdx) {
	p->parent[p->depth].textAttrib = textAttrib;
	p->parent[p->depth].textAttribIdx = textAttribIdx;
}

void XML_Stack_addChildHandler(XML_Stack* p, cstring name, UA_Int32 length, XML_decoder handler, UA_Int32 type, void* dst) {
	unsigned int len = p->parent[p->depth].len;
	p->parent[p->depth].children[len].name = name;
	p->parent[p->depth].children[len].length = length;
	p->parent[p->depth].children[len].elementHandler = handler;
	p->parent[p->depth].children[len].type = type;
	p->parent[p->depth].children[len].obj = dst;
	p->parent[p->depth].len++;
}

UA_Int32 UA_Int16_copycstring(cstring src, UA_Int16* dst) {
	*dst = atoi(src);
	return UA_SUCCESS;
}
UA_Int32 UA_UInt16_copycstring(cstring src, UA_UInt16* dst) {
	*dst = atoi(src);
	return UA_SUCCESS;
}
UA_Int32 UA_Int16_decodeXML(XML_Stack* s, XML_Attr* attr, UA_Int16* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_Int32 entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		if (dst == UA_NULL) {
			UA_Int16_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		UA_Int16_copycstring((cstring) attr[1], dst);
	}
	return UA_SUCCESS;
}

UA_Int32 UA_Int32_decodeXML(XML_Stack* s, XML_Attr* attr, UA_Int32* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_Int32 entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		if (dst == UA_NULL) {
			UA_Int32_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		*dst = atoi(attr[1]);
	}
	return UA_SUCCESS;
}

UA_Int32 UA_Text_decodeXML(XML_Stack* s, XML_Attr* attr, UA_Byte** dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_String entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_alloc((void**)&dst,sizeof(void*));
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Data", attr[i], strlen("Data"))) {
				char* tmp;
				UA_alloc((void**)&tmp,strlen(attr[i+1])+1);
				strncpy(tmp,attr[i+1],strlen(attr[i+1]));
				tmp[strlen(attr[i+1])] = 0;
				*dst = (UA_Byte*) tmp;
			} else {
				printf("UA_Text_decodeXML - Unknown attribute - name=%s, value=%s\n", attr[i], attr[i+1]);
			}
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_String_decodeXML(XML_Stack* s, XML_Attr* attr, UA_String* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_String entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_String_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Data", strlen("Data"), (XML_decoder) UA_Text_decodeXML, UA_BYTE, &(dst->data));
		XML_Stack_addChildHandler(s, "Length", strlen("Length"), (XML_decoder) UA_Int32_decodeXML, UA_INT32, &(dst->length));
		XML_Stack_handleTextAsElementOf(s, "Data", 0);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Data", attr[i], strlen("Data"))) {
				UA_String_copycstring(attr[i + 1], dst);
			} else {
				printf("UA_String_decodeXML - Unknown attribute - name=%s, value=%s\n", attr[i], attr[i+1]);
			}
		}
	} else {
		switch (s->parent[s->depth - 1].activeChild) {
		case 0:
			if (dst != UA_NULL && dst->data != UA_NULL && dst->length == -1) {
				dst->length = strlen((char const*)dst->data);
			}
			break;
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_NodeId_decodeXML(XML_Stack* s, XML_Attr* attr, UA_NodeId* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_NodeId entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_NodeId_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Namespace", strlen("Namespace"), (XML_decoder) UA_Int16_decodeXML, UA_INT16, &(dst->namespace));
		XML_Stack_addChildHandler(s, "Numeric", strlen("Numeric"), (XML_decoder) UA_Int32_decodeXML, UA_INT32, &(dst->identifier.numeric));
		XML_Stack_addChildHandler(s, "Identifier", strlen("Identifier"), (XML_decoder) UA_String_decodeXML, UA_STRING, UA_NULL);
		XML_Stack_handleTextAsElementOf(s, "Data", 2);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Namespace", attr[i], strlen("Namespace"))) {
				dst->namespace = atoi(attr[i + 1]);
			} else if (0 == strncmp("Numeric", attr[i], strlen("Numeric"))) {
				dst->identifier.numeric = atoi(attr[i + 1]);
				dst->encodingByte = UA_NODEIDTYPE_FOURBYTE;
			} else {
				printf("UA_NodeId_decodeXML - Unknown attribute name=%s, value=%s\n", attr[i], attr[i+1]);
			}
		}
	} else {
		if (s->parent[s->depth - 1].activeChild == 2) {
			UA_NodeId_copycstring((cstring)((UA_String*)attr)->data,dst,s->aliases);
		}
	}
	return UA_SUCCESS;
}
UA_Int32 UA_ExpandedNodeId_decodeXML(XML_Stack* s, XML_Attr* attr, UA_ExpandedNodeId* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_ExpandedNodeId entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_ExpandedNodeId_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "NodeId", strlen("NodeId"), (XML_decoder) UA_NodeId_decodeXML, UA_NODEID, &(dst->nodeId));
		XML_Stack_addChildHandler(s, "Namespace", strlen("Namespace"),(XML_decoder) UA_Int16_decodeXML, UA_INT16, &(dst->nodeId.namespace));
		XML_Stack_addChildHandler(s, "Numeric", strlen("Numeric"),(XML_decoder) UA_Int32_decodeXML, UA_INT32,
				&(dst->nodeId.identifier.numeric));
		XML_Stack_addChildHandler(s, "Id", strlen("Id"),(XML_decoder) UA_String_decodeXML, UA_STRING, UA_NULL);
		XML_Stack_handleTextAsElementOf(s, "Data", 3);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Namespace", attr[i], strlen("Namespace"))) {
				UA_UInt16_copycstring((cstring) attr[i + 1], &(dst->nodeId.namespace));
			} else if (0 == strncmp("Numeric", attr[i], strlen("Numeric"))) {
				UA_NodeId_copycstring((cstring) attr[i + 1], &(dst->nodeId), s->aliases);
			} else if (0 == strncmp("NodeId", attr[i], strlen("NodeId"))) {
				UA_NodeId_copycstring((cstring) attr[i + 1], &(dst->nodeId), s->aliases);
			} else {
				printf("UA_ExpandedNodeId_decodeXML - unknown attribute name=%s, value=%s\n", attr[i], attr[i+1]);
			}
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_LocalizedText_decodeXML(XML_Stack* s, XML_Attr* attr, UA_LocalizedText* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_LocalizedText entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_LocalizedText_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		// s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Text", strlen("Text"), (XML_decoder) UA_String_decodeXML, UA_STRING, &(dst->text));
		XML_Stack_addChildHandler(s, "Locale", strlen("Locale"), (XML_decoder) UA_String_decodeXML, UA_STRING, &(dst->locale));
		XML_Stack_handleTextAsElementOf(s, "Data", 0);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Text", attr[i], strlen("Text"))) {
				UA_String_copycstring(attr[i + 1], &(dst->text));
				dst->encodingMask |= UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else if (0 == strncmp("Locale", attr[i], strlen("Locale"))) {
				UA_String_copycstring(attr[i + 1], &(dst->locale));
				dst->encodingMask |= UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_LOCALE;
			} else {
				perror("Unknown attribute");
			}
		}
	} else {
		switch (s->parent[s->depth - 1].activeChild) {
		case 0:
			dst->encodingMask |= UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			break;
		case 1:
			dst->encodingMask |= UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_LOCALE;
			break;
		default:
			break;
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_QualifiedName_decodeXML(XML_Stack* s, XML_Attr* attr, UA_QualifiedName* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_QualifiedName entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;
	if (isStart) {
		if (dst == UA_NULL) {
			UA_QualifiedName_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Name", strlen("Name"), (XML_decoder) UA_String_decodeXML, UA_STRING, &(dst->name));
		XML_Stack_addChildHandler(s, "NamespaceIndex", strlen("NamespaceIndex"), (XML_decoder) UA_Int16_decodeXML, UA_STRING,
				&(dst->namespaceIndex));
		XML_Stack_handleTextAsElementOf(s, "Data", 0);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("NamespaceIndex", attr[i], strlen("NamespaceIndex"))) {
				dst->namespaceIndex = atoi(attr[i + 1]);
			} else if (0 == strncmp("Name", attr[i], strlen("Name"))) {
				UA_String_copycstring(attr[i + 1], &(dst->name));
			} else {
				perror("Unknown attribute");
			}
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_ReferenceNode_decodeXML(XML_Stack* s, XML_Attr* attr, UA_ReferenceNode* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_ReferenceNode_decodeXML entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		// create if necessary
		if (dst == UA_NULL) {
			UA_ReferenceNode_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		// set handlers
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "ReferenceType", strlen("ReferenceType"),(XML_decoder) UA_NodeId_decodeXML, UA_STRING,
				&(dst->referenceTypeId));
		XML_Stack_addChildHandler(s, "IsForward", strlen("IsForward"), (XML_decoder) UA_Boolean_decodeXML, UA_STRING, &(dst->isInverse));
		XML_Stack_addChildHandler(s, "Target", strlen("Target"), (XML_decoder) UA_ExpandedNodeId_decodeXML, UA_STRING, &(dst->targetId));
		XML_Stack_handleTextAsElementOf(s, "NodeId", 2);

		// set attributes
		UA_Int32 i;
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("ReferenceType", attr[i], strlen("ReferenceType"))) {
				UA_NodeId_copycstring(attr[i + 1], &(dst->referenceTypeId), s->aliases);
			} else if (0 == strncmp("IsForward", attr[i], strlen("IsForward"))) {
				UA_Boolean_copycstring(attr[i + 1], &(dst->isInverse));
				dst->isInverse = !dst->isInverse;
			} else if (0 == strncmp("Target", attr[i], strlen("Target"))) {
				UA_ExpandedNodeId_copycstring(attr[i + 1], &(dst->targetId), s->aliases);
			} else {
				DBG_ERR(XML_Stack_print(s));DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	}
	return UA_SUCCESS;
}


UA_Int32 UA_TypedArray_decodeXML(XML_Stack* s, XML_Attr* attr, UA_TypedArray* dst, _Bool isStart) {
	UA_Int32 type = s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].type;
	cstring names  = s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].name;
	DBG_VERBOSE(printf("UA_TypedArray_decodeXML - entered with dst=%p,isStart=%d,type={%d,%s},name=%s\n", (void* ) dst, isStart,type,UA_[type].name, names));
	if (isStart) {
		if (dst == UA_NULL) {
			UA_TypedArray_new(&dst);
			UA_TypedArray_setType(dst, type);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = dst;
		}
		// need to map from ArrayName to member name
		// References - Reference
		// Aliases - Alias
		// ListOfXX - XX
		UA_Int32 length = 0;
		if (0 == strncmp("ListOf",names,strlen("ListOf"))) {
			names = &names[strlen("ListOf")];
			length = strlen(names);
		} else if ( 0 == strncmp("References",names,strlen("References"))){
			length = strlen(names) - 1;
		} else if ( 0 == strncmp("Aliases",names,strlen("Aliases"))){
			length = strlen(names) - 2;
		}
		DBG(printf("UA_TypedArray_decodeXML - add handler for {%.*s}\n", length, names));
		XML_Stack_addChildHandler(s, names, length, (XML_decoder) UA_[type].decodeXML, type, UA_NULL);
	} else {
		// sub element is ready, add to array
		if (dst->size < 0 || dst->size == 0) {
			dst->size = 1;
			UA_alloc((void** )&(dst->elements), dst->size * sizeof(void*));
			DBG(printf("UA_TypedArray_decodeXML - allocate elements:dst=%p, aliases=%p, size=%d\n", (void* )dst, (void* )(dst->elements),dst->size));
		} else {
			dst->size++;
			dst->elements = realloc(dst->elements, dst->size * sizeof(void*));
			DBG(printf("UA_TypedArray_decodeXML - reallocate elements:dst=%p, aliases=%p, size=%d\n", (void* )dst,(void* )(dst->elements), dst->size));
		}
		// index starts with 0, therefore size-1
		DBG_VERBOSE(printf("UA_TypedArray_decodeXML - assign element[%d], src=%p\n", dst->size - 1, (void* )attr));
		dst->elements[dst->size - 1] = (void*) attr;
		DBG_VERBOSE(printf("UA_TypedArray_decodeXML - clear %p\n",(void* ) (s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj)));
		s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
	}
	return UA_SUCCESS;
}


UA_Int32 UA_DataTypeNode_decodeXML(XML_Stack* s, XML_Attr* attr, UA_DataTypeNode* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_DataTypeNode entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;

	if (isStart) {
		// create a new object if called with UA_NULL
		if (dst == UA_NULL) {
			UA_DataTypeNode_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}

		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "DisplayName", strlen("DisplayName"), (XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT, &(dst->displayName));
		XML_Stack_addChildHandler(s, "Description", strlen("Description"),(XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT, &(dst->description));
		XML_Stack_addChildHandler(s, "BrowseName", strlen("BrowseName"),(XML_decoder) UA_QualifiedName_decodeXML, UA_QUALIFIEDNAME, &(dst->description));
		XML_Stack_addChildHandler(s, "IsAbstract", strlen("IsAbstract"),(XML_decoder) UA_Boolean_decodeXML, UA_BOOLEAN, &(dst->description));
		XML_Stack_addChildHandler(s, "References", strlen("References"),(XML_decoder) UA_TypedArray_decodeXML, UA_REFERENCENODE, UA_NULL);

		// set missing default attributes
		dst->nodeClass = UA_NODECLASS_DATATYPE;

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("NodeId", attr[i], strlen("NodeId"))) {
				UA_NodeId_copycstring(attr[i + 1], &(dst->nodeId), s->aliases);
			} else if (0 == strncmp("BrowseName", attr[i], strlen("BrowseName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->browseName.name));
				dst->browseName.namespaceIndex = 0;
			} else if (0 == strncmp("DisplayName", attr[i], strlen("DisplayName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->displayName.text));
				dst->displayName.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else if (0 == strncmp("IsAbstract", attr[i], strlen("IsAbstract"))) {
				UA_Boolean_copycstring(attr[i + 1], &(dst->isAbstract));
				dst->displayName.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else if (0 == strncmp("Description", attr[i], strlen("Description"))) {
				UA_String_copycstring(attr[i + 1], &(dst->description.text));
				dst->description.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else {
				DBG_ERR(XML_Stack_print(s));DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	} else {
		switch (s->parent[s->depth - 1].activeChild) {
		case 4: // References
			if (attr != UA_NULL) {
				UA_TypedArray* array = (UA_TypedArray *) attr;
				DBG_VERBOSE(printf("finished aliases: references=%p, size=%d\n",(void*)array,(array==UA_NULL)?-1:array->size));
				dst->referencesSize = array->size;
				dst->references = (UA_ReferenceNode**) array->elements;
			}
		break;
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_ObjectNode_decodeXML(XML_Stack* s, XML_Attr* attr, UA_ObjectNode* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_ObjectNode entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;

	if (isStart) {
		// create a new object if called with UA_NULL
		if (dst == UA_NULL) {
			UA_ObjectNode_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}

		// s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "DisplayName", strlen("DisplayName"), (XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT, &(dst->displayName));
		XML_Stack_addChildHandler(s, "Description", strlen("Description"), (XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT, &(dst->description));
		// FIXME: no idea how to handle SymbolicName automatically. Seems to me that it is the "real" BrowseName
		//		XML_Stack_addChildHandler(s, "BrowseName", (XML_decoder) UA_QualifiedName_decodeXML, UA_QUALIFIEDNAME,&(dst->browseName));
		XML_Stack_addChildHandler(s, "SymbolicName", strlen("SymbolicName"), (XML_decoder) UA_QualifiedName_decodeXML, UA_QUALIFIEDNAME,&(dst->browseName));
		XML_Stack_addChildHandler(s, "References", strlen("References"), (XML_decoder) UA_TypedArray_decodeXML, UA_REFERENCENODE, UA_NULL);

		// set missing default attributes
		dst->nodeClass = UA_NODECLASS_DATATYPE;

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("NodeId", attr[i], strlen("NodeId"))) {
				UA_NodeId_copycstring(attr[i + 1], &(dst->nodeId), s->aliases);
			} else if (0 == strncmp("SymbolicName", attr[i], strlen("SymboliName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->browseName.name));
				dst->browseName.namespaceIndex = 0;
			} else if (0 == strncmp("DisplayName", attr[i], strlen("DisplayName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->displayName.text));
				dst->displayName.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else if (0 == strncmp("Description", attr[i], strlen("Description"))) {
				UA_String_copycstring(attr[i + 1], &(dst->description.text));
				dst->description.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else {
				DBG_ERR(XML_Stack_print(s));DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	} else {
		if (s->parent[s->depth - 1].activeChild == 3 && attr != UA_NULL ) { // References Array
			UA_TypedArray* array = (UA_TypedArray*) attr;
			DBG(printf("UA_ObjectNode_decodeXML finished references: references=%p, size=%d\n",(void*)array,(array==UA_NULL)?-1:array->size));
			dst->referencesSize = array->size;
			dst->references = (UA_ReferenceNode**) array->elements;
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		}
	}
	return UA_SUCCESS;
}


UA_Int32 UA_Variant_decodeXML(XML_Stack* s, XML_Attr* attr, UA_Variant* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_Variant entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;

	if (isStart) {
		// create a new object if called with UA_NULL
		if (dst == UA_NULL) {
			UA_Variant_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}

		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "ListOfExtensionObject", strlen("ListOfExtensionObject"), (XML_decoder) UA_TypedArray_decodeXML, UA_EXTENSIONOBJECT, UA_NULL);
		XML_Stack_addChildHandler(s, "ListOfLocalizedText", strlen("ListOfLocalizedText"), (XML_decoder) UA_TypedArray_decodeXML, UA_LOCALIZEDTEXT, UA_NULL);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			{
				DBG_ERR(XML_Stack_print(s));
				DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	} else {
		if (s->parent[s->depth - 1].activeChild == 0 && attr != UA_NULL ) { // ExtensionObject
			UA_TypedArray* array = (UA_TypedArray*) attr;
			DBG_VERBOSE(printf("UA_Variant_decodeXML - finished array: references=%p, size=%d\n",(void*)array,(array==UA_NULL)?-1:array->size));
			dst->arrayLength = array->size;
			dst->data = array->elements;
			dst->vt = &UA_[UA_EXTENSIONOBJECT];
			dst->encodingMask = UA_EXTENSIONOBJECT_NS0 & UA_VARIANT_ENCODINGMASKTYPE_ARRAY;
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		} else if (s->parent[s->depth - 1].activeChild == 1 && attr != UA_NULL ) { // LocalizedText
			UA_TypedArray* array = (UA_TypedArray*) attr;
			DBG_VERBOSE(printf("UA_Variant_decodeXML - finished array: references=%p, size=%d\n",(void*)array,(array==UA_NULL)?-1:array->size));
			dst->arrayLength = array->size;
			dst->data = array->elements;
			dst->vt = &UA_[UA_LOCALIZEDTEXT];
			dst->encodingMask = UA_LOCALIZEDTEXT_NS0 & UA_VARIANT_ENCODINGMASKTYPE_ARRAY;
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		}
	}
	return UA_SUCCESS;
}

UA_Int32 UA_ExtensionObject_decodeXML(XML_Stack* s, XML_Attr* attr, UA_ExtensionObject* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_ExtensionObject entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;

	if (isStart) {
		// create a new object if called with UA_NULL
		if (dst == UA_NULL) {
			UA_ExtensionObject_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}

		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "TypeId", strlen("TypeId"), (XML_decoder) UA_NodeId_decodeXML, UA_NODEID, &(dst->typeId));
		// XML_Stack_addChildHandler(s, "Body", strlen("Body"), (XML_decoder) UA_Body_decodeXML, UA_LOCALIZEDTEXT, UA_NULL);

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			{
				DBG_ERR(XML_Stack_print(s));
				DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	}
	return UA_SUCCESS;
}

_Bool UA_NodeId_isBuiltinType(UA_NodeId* nodeid) {
	return (nodeid->namespace == 0 &&
			nodeid->identifier.numeric >= UA_BOOLEAN_NS0 &&
			nodeid->identifier.numeric <= UA_DIAGNOSTICINFO_NS0
			);
}

UA_Int32 UA_VariableNode_decodeXML(XML_Stack* s, XML_Attr* attr, UA_VariableNode* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_VariableNode entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	UA_UInt32 i;

	if (isStart) {
		// create a new object if called with UA_NULL
		if (dst == UA_NULL) {
			UA_VariableNode_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}

		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "DisplayName", strlen("DisplayName"), (XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT,
				&(dst->displayName));
		XML_Stack_addChildHandler(s, "Description", strlen("Description"),(XML_decoder) UA_LocalizedText_decodeXML, UA_LOCALIZEDTEXT,
				&(dst->description));
		XML_Stack_addChildHandler(s, "DataType", strlen("DataType"),(XML_decoder) UA_NodeId_decodeXML, UA_NODEID, &(dst->dataType));
		XML_Stack_addChildHandler(s, "ValueRank", strlen("ValueRank"),(XML_decoder) UA_Int32_decodeXML, UA_INT32, &(dst->valueRank));
		XML_Stack_addChildHandler(s, "Value", strlen("Value"),(XML_decoder) UA_Variant_decodeXML, UA_VARIANT, &(dst->value));
		XML_Stack_addChildHandler(s, "References", strlen("References"), (XML_decoder) UA_TypedArray_decodeXML, UA_REFERENCENODE,
		UA_NULL);

		// set missing default attributes
		dst->nodeClass = UA_NODECLASS_VARIABLE;

		// set attributes
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("NodeId", attr[i], strlen("NodeId"))) {
				UA_NodeId_copycstring(attr[i + 1], &(dst->nodeId), s->aliases);
			} else if (0 == strncmp("DataType", attr[i], strlen("DataType"))) {
				UA_NodeId_copycstring(attr[i + 1], &(dst->dataType), s->aliases);
				if (UA_NodeId_isBuiltinType(&(dst->dataType))) {
					dst->value.encodingMask = dst->dataType.identifier.numeric;
					dst->value.vt = &UA_[UA_ns0ToVTableIndex(dst->dataType.identifier.numeric)];
				} else {
					dst->value.encodingMask = UA_EXTENSIONOBJECT_NS0;
					dst->value.vt = &UA_[UA_EXTENSIONOBJECT];
				}
			} else if (0 == strncmp("ValueRank", attr[i], strlen("ValueRank"))) {
				dst->valueRank = atoi(attr[i + 1]);
			} else if (0 == strncmp("ParentNodeId", attr[i], strlen("ParentNodeId"))) {
				// FIXME: this seems to be redundant to the hasProperty-reference
			} else if (0 == strncmp("BrowseName", attr[i], strlen("BrowseName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->browseName.name));
				dst->browseName.namespaceIndex = 0;
			} else if (0 == strncmp("DisplayName", attr[i], strlen("DisplayName"))) {
				UA_String_copycstring(attr[i + 1], &(dst->displayName.text));
				dst->displayName.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else if (0 == strncmp("Description", attr[i], strlen("Description"))) {
				UA_String_copycstring(attr[i + 1], &(dst->description.text));
				dst->description.encodingMask = UA_LOCALIZEDTEXT_ENCODINGMASKTYPE_TEXT;
			} else {
				DBG_ERR(XML_Stack_print(s));
				DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	} else {
		if (s->parent[s->depth - 1].activeChild == 5 && attr != UA_NULL) { // References
			UA_TypedArray* array = (UA_TypedArray*) attr;
			DBG(printf("UA_VariableNode_decodeXML - finished references=%p, size=%d\n",(void*)array,(array==UA_NULL)?-1:array->size));
			dst->referencesSize = array->size;
			dst->references = (UA_ReferenceNode**) array->elements;
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		}
	}
	return UA_SUCCESS;
}

void print_node(UA_Node const * node) {
	if (node != UA_NULL) {
		UA_NodeId_printf("node.nodeId=", &(node->nodeId));
		printf("\t.browseName='%.*s'\n", node->browseName.name.length, node->browseName.name.data);
		printf("\t.displayName='%.*s'\n", node->displayName.text.length, node->displayName.text.data);
		printf("\t.description='%.*s%s'\n", node->description.text.length > 40 ? 40 : node->description.text.length,
				node->description.text.data, node->description.text.length > 40 ? "..." : "");
		printf("\t.nodeClass=%d\n", node->nodeClass);
		printf("\t.writeMask=%d\n", node->writeMask);
		printf("\t.userWriteMask=%d\n", node->userWriteMask);
		printf("\t.references.size=%d\n", node->referencesSize);
		UA_Int32 i;
		for (i=0;i<node->referencesSize;i++) {
			printf("\t\t.element[%d]", i);
			UA_ReferenceNode_println("=",node->references[i]);
		}
		switch (node->nodeClass) {
		case UA_NODECLASS_VARIABLE: {
			UA_VariableNode const * p = (UA_VariableNode const *) node;
			printf("\t----- UA_VariableNode ----- \n");
			UA_NodeId_printf("\t.dataType=", &(p->dataType));
			printf("\t.valueRank=%d\n", p->valueRank);
			printf("\t.accessLevel=%d\n", p->accessLevel);
			printf("\t.userAccessLevel=%d\n", p->userAccessLevel);
			printf("\t.arrayDimensionsSize=%d\n", p->arrayDimensionsSize);
			printf("\t.minimumSamplingInterval=%f\n", p->minimumSamplingInterval);
			printf("\t.historizing=%d\n", p->historizing);
			printf("\t----- UA_Variant ----- \n");
			printf("\t.value.type.name=%s\n", p->value.vt->name);
			printf("\t.value.array.length=%d\n", p->value.arrayLength);
			UA_Int32 i;
			for (i=0;i<p->value.arrayLength || (p->value.arrayLength==-1 && i==0);++i) {
				printf("\t.value.array.element[%d]=%p", i, (p->value.data == UA_NULL ? UA_NULL : p->value.data[i]));
				switch (p->value.vt->ns0Id) {
				case UA_LOCALIZEDTEXT_NS0: {
					if (p->value.data != UA_NULL) {
						UA_LocalizedText* ltp = (UA_LocalizedText*) p->value.data[i];
						printf(",enc=%d,locale={%d,{%.*s}},text={%d,{%.*s}}",ltp->encodingMask,ltp->locale.length,ltp->locale.length,ltp->locale.data,ltp->text.length,ltp->text.length,ltp->text.data);
					}
				}
				break;
				case UA_EXTENSIONOBJECT_NS0: {
					if (p->value.data != UA_NULL) {
						UA_ExtensionObject* eo = (UA_ExtensionObject*) p->value.data[i];
						if (eo == UA_NULL) {
							printf(",(null)");
						} else {
							printf(",enc=%d,typeId={i=%d}",eo->encoding,eo->typeId.identifier.numeric);
						}
					}
				}
				break;
				default:
				break;
				}
				printf("\n");
			}
		}
			break;
		// case UA_NODECLASS_DATATYPE:
		default:
			break;
		}
	}
}

UA_Int32 UA_NodeSetAlias_decodeXML(XML_Stack* s, XML_Attr* attr, UA_NodeSetAlias* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_NodeSetAlias entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		// create if necessary
		if (dst == UA_NULL) {
			UA_NodeSetAlias_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		// set handlers
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Alias", strlen("Alias"), (XML_decoder) UA_String_decodeXML, UA_STRING, &(dst->alias));
		XML_Stack_addChildHandler(s, "Value", strlen("Value"), (XML_decoder) UA_String_decodeXML, UA_STRING, &(dst->value));
		XML_Stack_handleTextAsElementOf(s, "Data", 1);

		// set attributes
		UA_Int32 i;
		for (i = 0; attr[i]; i += 2) {
			if (0 == strncmp("Alias", attr[i], strlen("Alias"))) {
				UA_String_copycstring(attr[i + 1], &(dst->alias));
			} else if (0 == strncmp("Value", attr[i], strlen("Value"))) {
				UA_String_copycstring(attr[i + 1], &(dst->value));
			} else {
				DBG_ERR(XML_Stack_print(s));DBG_ERR(printf("%s - unknown attribute\n", attr[i]));
			}
		}
	} else {
		// sub element is ready
// TODO: It is a design flaw that we need to do this here, isn't it?
//		DBG_VERBOSE(printf("UA_NodeSetAlias clears %p\n", (void* ) (s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj)));
//		s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
	}
	return UA_SUCCESS;
}

UA_Int32 UA_NodeSetAliases_decodeXML(XML_Stack* s, XML_Attr* attr, UA_NodeSetAliases* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_NodeSetALiases entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		if (dst == UA_NULL) {
			UA_NodeSetAliases_new(&dst);
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Alias", strlen("Alias"), (XML_decoder) UA_NodeSetAlias_decodeXML, UA_INVALIDTYPE, UA_NULL);
	} else {
		// sub element is ready, add to array
		if (dst->size < 0 || dst->size == 0) {
			dst->size = 1;
			UA_alloc((void** )&(dst->aliases), dst->size * sizeof(UA_NodeSetAlias*));
			DBG_VERBOSE(
					printf("allocate aliases:dst=%p, aliases=%p, size=%d\n", (void* )dst, (void* )(dst->aliases),
							dst->size));
		} else {
			dst->size++;
			dst->aliases = realloc(dst->aliases, dst->size * sizeof(UA_NodeSetAlias*));
			DBG_VERBOSE(
					printf("reallocate aliases:dst=%p, aliases=%p, size=%d\n", (void* )dst, (void* )(dst->aliases),
							dst->size));
		}
		// index starts with 0, therefore size-1
		DBG_VERBOSE(printf("assign alias:dst=%p, src=%p\n", (void* )dst->aliases[dst->size - 1], (void* )attr));
		dst->aliases[dst->size - 1] = (UA_NodeSetAlias*) attr;
		DBG_VERBOSE(printf("UA_NodeSetAliases clears %p\n", (void* ) (s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj)));
		s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
	}
	return UA_SUCCESS;
}

UA_Int32 UA_NodeSet_decodeXML(XML_Stack* s, XML_Attr* attr, UA_NodeSet* dst, _Bool isStart) {
	DBG_VERBOSE(printf("UA_NodeSet entered with dst=%p,isStart=%d\n", (void* ) dst, isStart));
	if (isStart) {
		if (dst == UA_NULL) {
			UA_NodeSet_new(&dst, 99); // we don't really need the namespaceid for this..'
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = (void*) dst;
		}
		s->parent[s->depth].len = 0;
		XML_Stack_addChildHandler(s, "Aliases", strlen("Aliases"), (XML_decoder) UA_NodeSetAliases_decodeXML, UA_INVALIDTYPE,
				&(dst->aliases));
		XML_Stack_addChildHandler(s, "UADataType", strlen("UADataType"), (XML_decoder) UA_DataTypeNode_decodeXML, UA_DATATYPENODE, UA_NULL);
		XML_Stack_addChildHandler(s, "UAVariableType", strlen("UAVariableType"), (XML_decoder) UA_VariableTypeNode_decodeXML, UA_VARIABLETYPENODE, UA_NULL);
		XML_Stack_addChildHandler(s, "UAVariable", strlen("UAVariable"), (XML_decoder) UA_VariableNode_decodeXML, UA_VARIABLENODE, UA_NULL);
		XML_Stack_addChildHandler(s, "UAObjectType", strlen("UAObjectType"), (XML_decoder) UA_ObjectTypeNode_decodeXML, UA_OBJECTTYPENODE, UA_NULL);
		XML_Stack_addChildHandler(s, "UAObject", strlen("UAObject"), (XML_decoder) UA_ObjectNode_decodeXML, UA_OBJECTNODE, UA_NULL);
	} else {
		if (s->parent[s->depth - 1].activeChild == 0 && attr != UA_NULL) {
			UA_NodeSetAliases* aliases = (UA_NodeSetAliases*) attr;
			DBG(printf("UA_NodeSet_decodeXML - finished aliases: aliases=%p, size=%d\n",(void*)aliases,(aliases==UA_NULL)?-1:aliases->size));
			s->aliases = aliases;
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		} else if (attr != UA_NULL && (s->parent[s->depth - 1].activeChild == 3 ||  s->parent[s->depth - 1].activeChild == 5)) {
			UA_Node* node = (UA_Node*) attr;
			DBG(printf("UA_NodeSet_decodeXML - finished node: node=%p\n", (void* )node));
			Namespace_insert(dst->ns, node);
			DBG(printf("UA_NodeSet_decodeXML - Inserting "));
			DBG(print_node(node));
			s->parent[s->depth - 1].children[s->parent[s->depth - 1].activeChild].obj = UA_NULL;
		}
	}
	return UA_SUCCESS;
}

/** lookup if element is a known child of parent, if yes go for it otherwise ignore */
void XML_Stack_startElement(void * data, const char *el, const char **attr) {
	XML_Stack* s = (XML_Stack*) data;
	int i;

// scan expected children
	XML_Parent* cp = &s->parent[s->depth];
	for (i = 0; i < cp->len; i++) {
		if (0 == strncmp(cp->children[i].name, el, cp->children[i].length)) {
			DBG_VERBOSE(XML_Stack_print(s));
			DBG_VERBOSE(printf("%s - processing\n", el));

			cp->activeChild = i;

			s->depth++;
			s->parent[s->depth].name = el;
			s->parent[s->depth].len = 0;
			s->parent[s->depth].textAttribIdx = -1;
			s->parent[s->depth].activeChild = -1;

			// finally call the elementHandler and return
			cp->children[i].elementHandler(data, attr, cp->children[i].obj, TRUE);
			return;
		}
	}
// if we come here we rejected the processing of el
	DBG_VERBOSE(XML_Stack_print(s));
	DBG_VERBOSE(printf("%s - rejected\n", el));
	s->depth++;
	s->parent[s->depth].name = el;
// this should be sufficient to reject the children as well
	s->parent[s->depth].len = 0;
}

UA_Int32 XML_isSpace(cstring s, int len) {
	int i;
	for (i = 0; i < len; i++) {
		if (!isspace(s[i])) {
			return UA_FALSE;
		}
	}
	return UA_TRUE;
}

/* simulates startElement, endElement behaviour */
void XML_Stack_handleText(void * data, const char *txt, int len) {
	XML_Stack* s = (XML_Stack*) data;

	if (len > 0 && !XML_isSpace(txt, len)) {
		XML_Parent* cp = &(s->parent[s->depth]);
		if (cp->textAttribIdx >= 0) {
			cp->activeChild = cp->textAttribIdx;
			char* buf; // need to copy txt to add 0 as string terminator
			UA_alloc((void** )&buf, len + 1);
			strncpy(buf, txt, len);
			buf[len] = 0;
			XML_Attr attr[3] = { cp->textAttrib, buf, UA_NULL };
			DBG(printf("handleText @ %s calls start elementHandler %s with dst=%p, buf={%s}\n", XML_Stack_path(s),cp->children[cp->activeChild].name, cp->children[cp->activeChild].obj, buf));
			cp->children[cp->activeChild].elementHandler(s, attr, cp->children[cp->activeChild].obj, TRUE);
			// FIXME: The indices of this call are simply wrong
			// DBG_VERBOSE(printf("handleText calls finish elementHandler %s with dst=%p, attr=(nil)\n", cp->children[cp->activeChild].name, cp->children[cp->activeChild].obj));
			// cp->children[cp->activeChild].elementHandler(s, UA_NULL, cp->children[cp->activeChild].obj, FALSE);

			if (s->parent[s->depth-1].activeChild > 0) {
				// FIXME: actually we'd like to have something like the following, won't we?
				// XML_Stack_endElement(data, cp->children[cp->activeChild].name);
				XML_child* c = &(s->parent[s->depth-1].children[s->parent[s->depth-1].activeChild]);
				c->elementHandler(s, UA_NULL, c->obj, FALSE);
			}
			UA_free(buf);
		} else {
			DBG_VERBOSE(XML_Stack_print(s));
			DBG_VERBOSE(printf("textData - ignore text data '%.*s'\n", len, txt));
		}
	}
}

/** if we are an activeChild of a parent we call the child-handler */
void XML_Stack_endElement(void *data, const char *el) {
	XML_Stack* s = (XML_Stack*) data;

// the parent of the parent (pop) of the element knows the elementHandler, therefore depth-2!
	if (s->depth > 1) {
		// inform parents elementHandler that everything is done
		XML_Parent* cp = &(s->parent[s->depth - 1]);
		XML_Parent* cpp = &(s->parent[s->depth - 2]);
		if (cpp->activeChild >= 0 && cp->activeChild >= 0) {
			DBG_VERBOSE(XML_Stack_print(s));
			DBG_VERBOSE(
					printf(" - inform pop %s, arg=%p\n", cpp->children[cpp->activeChild].name,
							(void* ) cp->children[cp->activeChild].obj));
			cpp->children[cpp->activeChild].elementHandler(s, (XML_Attr*) cp->children[cp->activeChild].obj,
					cpp->children[cpp->activeChild].obj, FALSE);
		}
		// reset
		cp->activeChild = -1;
	}
	s->depth--;
}

UA_Int32 Namespace_loadFromFile(Namespace **ns,UA_UInt32 namespaceId,const char* rootName,const char* fileName) {
	int f;
	if (fileName == UA_NULL)
		f = 0; // stdin
	else if ((f= open(fileName, O_RDONLY)) == -1)
		return UA_ERR_INVALID_VALUE;

	char buf[1024];
	int len; /* len is the number of bytes in the current bufferful of data */

	XML_Stack s;
	XML_Stack_init(&s, rootName);

	UA_NodeSet n;
	UA_NodeSet_init(&n, 0);
	XML_Stack_addChildHandler(&s, "UANodeSet", strlen("UANodeSet"), (XML_decoder) UA_NodeSet_decodeXML, UA_INVALIDTYPE, &n);

	XML_Parser parser = XML_ParserCreate(NULL);
	XML_SetUserData(parser, &s);
	XML_SetElementHandler(parser, XML_Stack_startElement, XML_Stack_endElement);
	XML_SetCharacterDataHandler(parser, XML_Stack_handleText);
	while ((len = read(f, buf, 1024)) > 0) {
		if (!XML_Parse(parser, buf, len, (len < 1024))) {
			return 1;
		}
	}
	XML_ParserFree(parser);
	close(f);

	DBG_VERBOSE(printf("Namespace_loadFromFile - aliases addr=%p, size=%d\n", (void*) &(n.aliases), n.aliases.size));
	DBG_VERBOSE(UA_NodeSetAliases_println("Namespace_loadFromFile - elements=", &n.aliases));

	// eventually return the namespace object that has been allocated in UA_NodeSet_init
	*ns = n.ns;
	return UA_SUCCESS;
}