/**
* raptor_init:
*
* Initialise the raptor library.
*
* This function MUST be called before using any of the raptor APIs.
**/
void
raptor_init(void)
{
if(raptor_initialised++)
return;
if(raptor_sax2_init())
goto failure;
if(raptor_parsers_init())
goto failure;
if(raptor_serializers_init())
goto failure;
if(raptor_uri_init())
goto failure;
raptor_www_init(); /* raptor_www_init() is part of raptor API, prototype not changed yet to return an error code */
return;
failure:
raptor_finish();
RAPTOR_FATAL1("raptor_init() failed");
}
/*
* raptor_turtle_emit_subject_list_items:
* @serializer: #raptor_serializer object
* @subject: subject node
* @depth: depth into tree
*
* Emit an rdf list of items (rdf:li) about a subject node.
*
* Return value: non-0 on failure
**/
static int
raptor_turtle_emit_subject_list_items(raptor_serializer* serializer,
raptor_abbrev_subject* subject,
int depth)
{
int rv = 0;
int i=0;
RAPTOR_DEBUG5("Emitting subject list items for node %p refcount %d subject %d object %d\n",
subject->node,
subject->node->ref_count, subject->node->count_as_subject,
subject->node->count_as_object);
while(!rv && i < raptor_sequence_size(subject->list_items)) {
raptor_abbrev_node* object;
object = (raptor_abbrev_node*)raptor_sequence_get_at(subject->list_items,
i++);
if(!object)
continue;
switch(object->type) {
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
rv = raptor_turtle_emit_resource(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
rv = raptor_turtle_emit_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
rv = raptor_turtle_emit_xml_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
rv = raptor_turtle_emit_blank(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
/* ordinals should never appear as an object with current parsers */
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
/* predicates should never appear as an object */
case RAPTOR_IDENTIFIER_TYPE_UNKNOWN:
default:
RAPTOR_FATAL1("Unsupported identifier type\n");
break;
}
}
return rv;
}
/*
* raptor_abbrev_subject implementation
*
* The subject of triples, with all predicates and values
* linked from them.
*
**/
raptor_abbrev_subject*
raptor_new_abbrev_subject(raptor_abbrev_node* node)
{
raptor_abbrev_subject* subject;
if(!(node->type == RAPTOR_IDENTIFIER_TYPE_RESOURCE ||
node->type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS ||
node->type == RAPTOR_IDENTIFIER_TYPE_ORDINAL)) {
RAPTOR_FATAL1("Subject node must be a resource, blank, or ordinal\n");
return NULL;
}
subject = (raptor_abbrev_subject*)RAPTOR_CALLOC(raptor_subject, 1,
sizeof(raptor_abbrev_subject));
if(subject) {
subject->node = node;
subject->node->ref_count++;
subject->node->count_as_subject++;
subject->node_type = NULL;
subject->properties =
raptor_new_avltree((raptor_data_compare_function)raptor_compare_abbrev_po,
(raptor_data_free_function)raptor_free_abbrev_po,
0);
#ifdef RAPTOR_DEBUG
raptor_avltree_set_print_handler(subject->properties,
(raptor_data_print_function)raptor_print_abbrev_po);
#endif
subject->list_items =
raptor_new_sequence((raptor_sequence_free_handler *)raptor_free_abbrev_node, NULL);
if(!subject->node || !subject->properties || !subject->list_items) {
raptor_free_abbrev_subject(subject);
subject = NULL;
}
}
return subject;
}
static void
raptor_librdfa_generate_statement(rdftriple* triple, void* callback_data)
{
raptor_parser* parser=(raptor_parser*)callback_data;
raptor_statement *s=&parser->statement;
raptor_uri *subject_uri=NULL;
raptor_uri *predicate_uri=NULL;
raptor_uri *object_uri=NULL;
raptor_uri *datatype_uri=NULL;
if(!triple->subject || !triple->predicate || !triple->object) {
RAPTOR_FATAL1("Triple has NULL parts\n");
rdfa_free_triple(triple);
return;
}
if(triple->object_type == RDF_TYPE_NAMESPACE_PREFIX) {
RAPTOR_FATAL1("Triple has namespace object type\n");
rdfa_free_triple(triple);
return;
}
if((triple->subject[0] == '_') && (triple->subject[1] == ':')) {
s->subject_type = RAPTOR_IDENTIFIER_TYPE_ANONYMOUS;
s->subject= (triple->subject + 2);
} else {
s->subject_type = RAPTOR_IDENTIFIER_TYPE_RESOURCE;
subject_uri=raptor_new_uri((const unsigned char*)triple->subject);
if(!subject_uri)
goto cleanup;
s->subject=subject_uri;
}
predicate_uri=raptor_new_uri((const unsigned char*)triple->predicate);
if(!predicate_uri)
goto cleanup;
s->predicate=predicate_uri;
s->predicate_type=RAPTOR_IDENTIFIER_TYPE_RESOURCE;
s->object = triple->object;
s->object_literal_datatype=NULL;
s->object_literal_language=NULL;
if(triple->object_type == RDF_TYPE_IRI) {
if((triple->object[0] == '_') && (triple->object[1] == ':')) {
s->object_type = RAPTOR_IDENTIFIER_TYPE_ANONYMOUS;
s->object = (triple->object + 2);
} else {
s->object_type = RAPTOR_IDENTIFIER_TYPE_RESOURCE;
object_uri=raptor_new_uri((const unsigned char*)triple->object);
if(!object_uri)
goto cleanup;
s->object=object_uri;
}
} else if(triple->object_type == RDF_TYPE_PLAIN_LITERAL) {
s->object_type=RAPTOR_IDENTIFIER_TYPE_LITERAL;
if(triple->language)
s->object_literal_language=(const unsigned char*)triple->language;
} else if(triple->object_type == RDF_TYPE_XML_LITERAL) {
s->object_type = RAPTOR_IDENTIFIER_TYPE_XML_LITERAL;
} else if(triple->object_type == RDF_TYPE_TYPED_LITERAL) {
s->object_type=RAPTOR_IDENTIFIER_TYPE_LITERAL;
if(triple->language)
s->object_literal_language=(const unsigned char*)triple->language;
if(triple->datatype) {
datatype_uri=raptor_new_uri((const unsigned char*)triple->datatype);
if(!datatype_uri)
goto cleanup;
s->object_literal_datatype=datatype_uri;
/* If datatype, no language allowed */
s->object_literal_language=NULL;
}
} else {
RAPTOR_FATAL2("Triple has unknown object type %d\n", s->object_type);
goto cleanup;
}
if(!parser->statement_handler)
goto cleanup;
/* Generate triple */
(*parser->statement_handler)(parser->user_data, s);
cleanup:
rdfa_free_triple(triple);
if(subject_uri)
raptor_free_uri(subject_uri);
if(predicate_uri)
raptor_free_uri(predicate_uri);
if(object_uri)
raptor_free_uri(object_uri);
if(datatype_uri)
raptor_free_uri(datatype_uri);
}
/*
* raptor_turtle_emit_subject_properties:
* @serializer: #raptor_serializer object
* @subject: subject node
* @depth: depth into tree
*
* Emit the properties about a subject node.
*
* Return value: non-0 on failure
**/
static int
raptor_turtle_emit_subject_properties(raptor_serializer* serializer,
raptor_abbrev_subject* subject,
int depth)
{
raptor_turtle_context* context=(raptor_turtle_context*)serializer->context;
raptor_turtle_writer *turtle_writer = context->turtle_writer;
raptor_abbrev_node* last_predicate=NULL;
int rv = 0;
raptor_avltree_iterator* iter=NULL;
int i;
RAPTOR_DEBUG5("Emitting subject properties for node %p refcount %d subject %d object %d\n",
subject->node, subject->node->ref_count,
subject->node->count_as_subject,
subject->node->count_as_object);
/* Emit any rdf:_n properties collected */
if(raptor_sequence_size(subject->list_items) > 0)
rv = raptor_turtle_emit_subject_list_items(serializer, subject, depth+1);
for(i=0, (iter=raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1));
iter && !rv;
i++, (rv=raptor_avltree_iterator_next(iter))) {
raptor_abbrev_node** nodes;
raptor_abbrev_node* predicate;
raptor_abbrev_node* object;
raptor_qname *qname;
nodes=(raptor_abbrev_node**)raptor_avltree_iterator_get(iter);
if(!nodes)
break;
predicate= nodes[0];
object= nodes[1];
if(!(last_predicate && raptor_abbrev_node_equals(predicate, last_predicate))) {
/* no object list abbreviation possible, terminate last object */
if(last_predicate) {
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)" ;");
raptor_turtle_writer_newline(turtle_writer);
}
if(predicate->type == RAPTOR_IDENTIFIER_TYPE_ORDINAL) {
/* we should only get here in rare cases -- usually when there
* are multiple ordinals with the same value. */
unsigned char uri_string[MAX_ASCII_INT_SIZE + 2];
sprintf((char*)uri_string, "_%d", predicate->value.ordinal.ordinal);
qname = raptor_new_qname_from_namespace_local_name_v2(serializer->world,
context->rdf_nspace,
uri_string,
NULL);
} else {
qname = raptor_namespaces_qname_from_uri(context->nstack,
predicate->value.resource.uri, 10);
}
if(raptor_abbrev_node_equals(predicate, context->rdf_type))
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)"a");
else if(qname)
raptor_turtle_writer_qname(turtle_writer, qname);
else
raptor_turtle_writer_reference(turtle_writer, predicate->value.resource.uri);
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)" ");
if(qname)
raptor_free_qname(qname);
} else
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)", ");
switch(object->type) {
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
rv = raptor_turtle_emit_resource(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
rv = raptor_turtle_emit_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
rv = raptor_turtle_emit_blank(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
rv = raptor_turtle_emit_xml_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
/* ordinals should never appear as an object with current parsers */
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
/* predicates should never appear as an object */
case RAPTOR_IDENTIFIER_TYPE_UNKNOWN:
default:
RAPTOR_FATAL1("Unsupported identifier type\n");
break;
}
last_predicate = predicate;
}
if (iter)
raptor_free_avltree_iterator(iter);
return rv;
}
/*
* raptor_turtle_emit_subject_collection_items:
* @serializer: #raptor_serializer object
* @subject: subject node
* @depth: depth into tree
*
* Emit an abbreviated rdf collection of items (rdf:first, rdf:rest) about a subject node.
*
* Return value: non-0 on failure
**/
static int
raptor_turtle_emit_subject_collection_items(raptor_serializer* serializer,
raptor_abbrev_subject* subject,
int depth)
{
raptor_turtle_context* context=(raptor_turtle_context*)serializer->context;
int rv = 0;
raptor_avltree_iterator* iter=NULL;
int i;
int is_new_subject = 0;
RAPTOR_DEBUG5("Emitting subject collection items for node %p refcount %d subject %d object %d\n",
subject->node,
subject->node->ref_count, subject->node->count_as_subject,
subject->node->count_as_object);
/* if just saw a new subject (is_new_subject is true) then there is no need
* to advance the iterator - it was just reset
*/
for(i=0, (iter=raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1));
iter && !rv;
i++, (rv = is_new_subject ? 0 : raptor_avltree_iterator_next(iter))) {
raptor_abbrev_node** nodes;
raptor_abbrev_node* predicate;
raptor_abbrev_node* object;
is_new_subject = 0;
nodes=(raptor_abbrev_node**)raptor_avltree_iterator_get(iter);
if(!nodes)
break;
predicate= nodes[0];
object= nodes[1];
if(!raptor_uri_equals_v2(serializer->world,
predicate->value.resource.uri,
context->rdf_first_uri)) {
raptor_serializer_error(serializer,
"Malformed collection - first predicate is not rdf:first");
return 1;
}
if(!object)
continue;
if(i > 0)
raptor_turtle_writer_newline(context->turtle_writer);
switch(object->type) {
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
rv = raptor_turtle_emit_resource(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
rv = raptor_turtle_emit_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
rv = raptor_turtle_emit_xml_literal(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
rv = raptor_turtle_emit_blank(serializer, object, depth+1);
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
/* ordinals should never appear as an object with current parsers */
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
/* predicates should never appear as an object */
case RAPTOR_IDENTIFIER_TYPE_UNKNOWN:
default:
RAPTOR_FATAL1("Unsupported identifier type\n");
break;
}
/* last item */
rv=raptor_avltree_iterator_next(iter);
if(rv)
break;
nodes=(raptor_abbrev_node**)raptor_avltree_iterator_get(iter);
predicate = nodes[0];
object = nodes[1];
if(!raptor_uri_equals_v2(serializer->world, predicate->value.resource.uri, context->rdf_rest_uri)) {
raptor_serializer_error(serializer,
"Malformed collection - second predicate is not rdf:rest");
return 1;
}
if(object->type == RAPTOR_IDENTIFIER_TYPE_ANONYMOUS) {
subject = raptor_abbrev_subject_find(context->blanks, object->type,
object->value.blank.string);
if(!subject) {
raptor_serializer_error(serializer,
"Malformed collection - could not find subject for rdf:rest");
return 1;
}
/* got a <(old)subject> rdf:rest <(new)subject> triple so know
* subject has changed and should reset the properties iterator
*/
if(iter)
raptor_free_avltree_iterator(iter);
iter = raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1);
is_new_subject = 1;
} else {
if(object->type != RAPTOR_IDENTIFIER_TYPE_RESOURCE ||
!raptor_uri_equals_v2(serializer->world, object->value.resource.uri, context->rdf_nil_uri)) {
raptor_serializer_error(serializer,
"Malformed collection - last rdf:rest resource is not rdf:nil");
return 1;
}
break;
}
}
if(iter)
raptor_free_avltree_iterator(iter);
return rv;
}
/*
* raptor_dot_serializer_node_matches:
* @node: #raptor_node to compare
* @node_type: Raptor identifier type
* @node_data: For node_type RAPTOR_IDENTIFIER_TYPE_ORDINAL, int* to the
* ordinal.
* @datatype: Literal datatype or NULL
* @language: Literal language or NULL
*
* Return value: non-zero if @node matches the node described by the rest of
* the parameters.
*/
static int
raptor_dot_serializer_node_matches(raptor_dot_serializer_node* node,
raptor_identifier_type node_type,
const void* node_data, raptor_uri* datatype,
const unsigned char* language)
{
int rv = 0;
if(node->type != node_type)
return 0;
switch (node->type) {
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
rv = raptor_uri_equals(node->value.resource.uri,
(raptor_uri*)node_data);
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
rv = !strcmp((const char*)node->value.blank.string,
(const char*)node_data);
break;
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
if((char*)node->value.literal.string != NULL &&
(char*)node_data != NULL) {
/* string */
rv = (strcmp((char*)node->value.literal.string,
(char*)node_data) == 0);
/* language */
if((char*)node->value.literal.language != NULL &&
(char*)language != NULL)
rv &= (strcmp((char*)node->value.literal.language,
(char*)language) == 0);
else if((char*)node->value.literal.language != NULL ||
(char*)language != NULL)
rv= 0;
/* datatype */
if(node->value.literal.datatype != NULL && datatype != NULL)
rv &= (raptor_uri_equals(node->value.literal.datatype,datatype) !=0);
else if(node->value.literal.datatype != NULL || datatype != NULL)
rv = 0;
} else {
RAPTOR_FATAL1("string must be non-NULL for literal or xml literal\n");
rv = 0;
}
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
case RAPTOR_IDENTIFIER_TYPE_UNKNOWN:
default:
/* Nothing to do */
break;
}
return rv;
}
static void
raptor_librdfa_generate_statement(rdftriple* triple, void* callback_data)
{
raptor_parser* parser = (raptor_parser*)callback_data;
raptor_statement *s = &parser->statement;
raptor_term *subject_term = NULL;
raptor_term *predicate_term = NULL;
raptor_uri *predicate_uri = NULL;
raptor_term *object_term = NULL;
if(!parser->emitted_default_graph) {
raptor_parser_start_graph(parser, NULL, 0);
parser->emitted_default_graph++;
}
if(!parser->statement_handler)
goto cleanup;
if(!triple->subject || !triple->predicate || !triple->object) {
#ifdef RAPTOR_DEBUG
RAPTOR_FATAL1("Triple has NULL parts\n");
#else
rdfa_free_triple(triple);
return;
#endif
}
if(triple->predicate[0] == '_') {
raptor_parser_warning(parser,
"Ignoring RDFa triple with blank node predicate %s.",
triple->predicate);
rdfa_free_triple(triple);
return;
}
if(triple->object_type == RDF_TYPE_NAMESPACE_PREFIX) {
#ifdef RAPTOR_DEBUG
RAPTOR_FATAL1("Triple has namespace object type\n");
#else
rdfa_free_triple(triple);
return;
#endif
}
if((triple->subject[0] == '_') && (triple->subject[1] == ':')) {
subject_term = raptor_new_term_from_blank(parser->world,
(const unsigned char*)triple->subject + 2);
} else {
raptor_uri* subject_uri;
subject_uri = raptor_new_uri(parser->world,
(const unsigned char*)triple->subject);
subject_term = raptor_new_term_from_uri(parser->world, subject_uri);
raptor_free_uri(subject_uri);
subject_uri = NULL;
}
s->subject = subject_term;
predicate_uri = raptor_new_uri(parser->world,
(const unsigned char*)triple->predicate);
if(!predicate_uri)
goto cleanup;
predicate_term = raptor_new_term_from_uri(parser->world, predicate_uri);
raptor_free_uri(predicate_uri);
predicate_uri = NULL;
s->predicate = predicate_term;
if(triple->object_type == RDF_TYPE_IRI) {
if((triple->object[0] == '_') && (triple->object[1] == ':')) {
object_term = raptor_new_term_from_blank(parser->world,
(const unsigned char*)triple->object + 2);
} else {
raptor_uri* object_uri;
object_uri = raptor_new_uri(parser->world,
(const unsigned char*)triple->object);
if(!object_uri)
goto cleanup;
object_term = raptor_new_term_from_uri(parser->world, object_uri);
raptor_free_uri(object_uri);
}
} else if(triple->object_type == RDF_TYPE_PLAIN_LITERAL) {
object_term = raptor_new_term_from_literal(parser->world,
(const unsigned char*)triple->object,
NULL,
(const unsigned char*)triple->language);
} else if(triple->object_type == RDF_TYPE_XML_LITERAL) {
raptor_uri* datatype_uri;
datatype_uri = raptor_new_uri_from_counted_string(parser->world,
(const unsigned char*)raptor_xml_literal_datatype_uri_string,
raptor_xml_literal_datatype_uri_string_len);
object_term = raptor_new_term_from_literal(parser->world,
(const unsigned char*)triple->object,
datatype_uri,
NULL);
raptor_free_uri(datatype_uri);
} else if(triple->object_type == RDF_TYPE_TYPED_LITERAL) {
raptor_uri *datatype_uri = NULL;
const unsigned char* language = (const unsigned char*)triple->language;
if(triple->datatype) {
/* If datatype, no language allowed */
language = NULL;
datatype_uri = raptor_new_uri(parser->world,
(const unsigned char*)triple->datatype);
if(!datatype_uri)
goto cleanup;
}
object_term = raptor_new_term_from_literal(parser->world,
(const unsigned char*)triple->object,
datatype_uri,
language);
raptor_free_uri(datatype_uri);
} else {
raptor_log_error_formatted(parser->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Triple has unknown object term type %u",
s->object->type);
goto cleanup;
}
s->object = object_term;
/* Generate statement */
(*parser->statement_handler)(parser->user_data, s);
cleanup:
rdfa_free_triple(triple);
if(subject_term)
raptor_free_term(subject_term);
if(predicate_term)
raptor_free_term(predicate_term);
if(object_term)
raptor_free_term(object_term);
}
/*
* raptor_new_qname_from_resource:
* @namespaces: sequence of namespaces (corresponding to nstack)
* @nstack: #raptor_namespace_stack to use/update
* @namespace_count: size of nstack (may be modified)
* @node: #raptor_abbrev_node to use
*
* Make an XML QName from the URI associated with the node.
*
* Return value: the QName or NULL on failure
**/
raptor_qname*
raptor_new_qname_from_resource(raptor_sequence* namespaces,
raptor_namespace_stack* nstack,
int* namespace_count,
raptor_abbrev_node* node)
{
unsigned char* name=NULL; /* where to split predicate name */
size_t name_len=1;
unsigned char *uri_string;
size_t uri_len;
unsigned char c;
unsigned char *p;
raptor_uri *ns_uri;
raptor_namespace *ns;
raptor_qname *qname;
if(node->type != RAPTOR_IDENTIFIER_TYPE_RESOURCE) {
RAPTOR_FATAL1("Node must be a resource\n");
return NULL;
}
qname=raptor_namespaces_qname_from_uri(nstack,
node->value.resource.uri, 10);
if(qname)
return qname;
uri_string = raptor_uri_as_counted_string(node->value.resource.uri, &uri_len);
p= uri_string;
name_len=uri_len;
while(name_len >0) {
if(raptor_xml_name_check(p, name_len, 10)) {
name=p;
break;
}
p++; name_len--;
}
if(!name || (name == uri_string))
return NULL;
c=*name; *name='\0';
ns_uri=raptor_new_uri(uri_string);
if(!ns_uri)
return NULL;
*name=c;
ns = raptor_namespaces_find_namespace_by_uri(nstack, ns_uri);
if(!ns) {
/* The namespace was not declared, so create one */
unsigned char prefix[2 + MAX_ASCII_INT_SIZE + 1];
*namespace_count = *namespace_count + 1;
sprintf((char *)prefix, "ns%d", *namespace_count);
ns = raptor_new_namespace_from_uri(nstack, prefix, ns_uri, 0);
/* We'll most likely need this namespace again. Push it on our
* stack. It will be deleted in
* raptor_rdfxmla_serialize_terminate
*/
if(raptor_sequence_push(namespaces, ns)) {
/* namespaces sequence has no free handler so we have to free the ns ourselves on error */
raptor_free_namespace(ns);
raptor_free_uri(ns_uri);
return NULL;
}
}
qname = raptor_new_qname_from_namespace_local_name(ns, name, NULL);
raptor_free_uri(ns_uri);
return qname;
}
/* compare two raptor_abbrev_nodes.
*
* This needs to be a strong ordering for use by raptor_avltree.
* This is very performance critical, anything to make it faster is worth it.
*/
int
raptor_abbrev_node_cmp(raptor_abbrev_node* node1, raptor_abbrev_node* node2)
{
int rv = 0;
if(node1 == node2) {
return 0;
} else if(node1->type < node2->type) {
return -1;
} else if(node1->type > node2->type) {
return 1;
}
switch (node1->type) {
case RAPTOR_IDENTIFIER_TYPE_RESOURCE:
case RAPTOR_IDENTIFIER_TYPE_PREDICATE:
rv = raptor_uri_compare(node1->value.resource.uri,
node2->value.resource.uri);
break;
case RAPTOR_IDENTIFIER_TYPE_ANONYMOUS:
rv = strcmp((const char*)node1->value.blank.string,
(const char*)node2->value.blank.string);
break;
case RAPTOR_IDENTIFIER_TYPE_LITERAL:
case RAPTOR_IDENTIFIER_TYPE_XML_LITERAL:
if((char *)node1->value.literal.string != NULL &&
(char *)node2->value.literal.string != NULL) {
/* string */
rv = strcmp((const char*)node1->value.literal.string,
(const char*)node2->value.literal.string);
if(rv != 0) {
break;
/* if string is equal, order by language */
} else {
if((const char*)node1->value.literal.language != NULL &&
(const char*)node2->value.literal.language != NULL) {
rv = strcmp((const char*)node1->value.literal.language,
(const char*)node2->value.literal.language);
} else if(node1->value.literal.language == NULL) {
rv = -1;
break;
} else {
rv = 1;
break;
}
}
/* if string and language are equal, order by datatype */
/* (rv == 0 if we get here) */
if(node1->value.literal.datatype != NULL &&
node2->value.literal.datatype != NULL) {
rv = strcmp((char*)node1->value.literal.datatype,
(char*)node2->value.literal.datatype);
} else if(node1->value.literal.datatype == NULL) {
rv = -1;
} else {
rv = 1;
}
} else {
RAPTOR_FATAL1("string must be non-NULL for literal or xml literal\n");
rv = 0;
}
break;
case RAPTOR_IDENTIFIER_TYPE_ORDINAL:
if(node1->value.ordinal.ordinal == node2->value.ordinal.ordinal)
rv = 0;
else if(node1->value.ordinal.ordinal < node2->value.ordinal.ordinal)
rv = -1;
else
rv = 1;
break;
case RAPTOR_IDENTIFIER_TYPE_UNKNOWN:
default:
/* Nothing to do */
break;
}
return rv;
}