/* add a namespace */
static int
raptor_dot_serializer_declare_namespace_from_namespace(raptor_serializer* serializer,
raptor_namespace *nspace)
{
raptor_dot_context * context = (raptor_dot_context *)serializer->context;
int i;
for( i = 0 ; i < raptor_sequence_size(context->namespaces) ; i++ ) {
raptor_namespace * ns;
ns = (raptor_namespace *)raptor_sequence_get_at(context->namespaces, i);
/* If prefix is already declared, ignore it */
if((!ns->prefix && !nspace->prefix) ||
(ns->prefix && nspace->prefix &&
!strcmp((const char*)ns->prefix, (const char*)nspace->prefix)) ||
(ns->uri && nspace->uri &&
raptor_uri_equals(ns->uri, nspace->uri)) )
return 1;
}
nspace = raptor_new_namespace_from_uri(context->nstack, nspace->prefix,
nspace->uri, 0);
if(!nspace)
return 1;
raptor_sequence_push(context->namespaces, nspace);
return 0;
}
/**
* librdf_uri_equals:
* @first_uri: #librdf_uri object 1
* @second_uri: #librdf_uri object 2
*
* Compare two librdf_uri objects for equality.
*
* Return value: non 0 if the objects are equal
**/
int
librdf_uri_equals(librdf_uri* first_uri, librdf_uri* second_uri)
{
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(first_uri, librdf_uri, 0);
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(second_uri, librdf_uri, 0);
return raptor_uri_equals(first_uri, second_uri);
}
/**
* librdf_uri_equals:
* @first_uri: #librdf_uri object 1
* @second_uri: #librdf_uri object 2
*
* Compare two librdf_uri objects for equality.
*
* Return value: non 0 if the objects are equal
**/
int
librdf_uri_equals(librdf_uri* first_uri, librdf_uri* second_uri)
{
#ifdef LIBRDF_USE_RAPTOR_URI
return raptor_uri_equals(first_uri, second_uri);
#else
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(first_uri, librdf_uri, 0);
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(second_uri, librdf_uri, 0);
if(!first_uri || !second_uri)
return 0;
return (first_uri == second_uri);
#endif
}
static void
rasqal_query_write_sparql_triple(sparql_writer_context *wc,
raptor_iostream* iostr, rasqal_triple* triple)
{
rasqal_query_write_sparql_literal(wc, iostr, triple->subject);
raptor_iostream_write_byte(' ', iostr);
if(triple->predicate->type == RASQAL_LITERAL_URI &&
raptor_uri_equals(triple->predicate->value.uri, wc->type_uri))
raptor_iostream_write_byte('a', iostr);
else
rasqal_query_write_sparql_literal(wc, iostr, triple->predicate);
raptor_iostream_write_byte(' ', iostr);
rasqal_query_write_sparql_literal(wc, iostr, triple->object);
raptor_iostream_counted_string_write(" .", 2, iostr);
}
/*
* rasqal_dataset_graph_present:
* @world: rasqal world
* @uri: graph URI
*
* INTERNAL - Check if a graph is in the dataset
*
* Return value: non-0 if the graph is present
**/
int
rasqal_dataset_graph_present(rasqal_world* world, raptor_uri* uri)
{
int offset = 0;
while(1) {
raptor_uri *graph_uri;
graph_uri = rasqal_dataset_enumerate(world, offset++);
if(!graph_uri)
break;
if(raptor_uri_equals(uri, graph_uri))
return 1;
}
return 0;
}
rasqal_literal_type
rasqal_xsd_datatype_uri_to_type(rasqal_world* world, raptor_uri* uri)
{
int i;
rasqal_literal_type native_type = RASQAL_LITERAL_UNKNOWN;
if(!uri || !world->xsd_datatype_uris)
return native_type;
for(i = (int)RASQAL_LITERAL_FIRST_XSD; i <= (int)XSD_INTEGER_DERIVED_LAST; i++) {
if(raptor_uri_equals(uri, world->xsd_datatype_uris[i])) {
if(i >= XSD_INTEGER_DERIVED_FIRST)
native_type = RASQAL_LITERAL_INTEGER_SUBTYPE;
else
native_type = (rasqal_literal_type)i;
break;
}
}
return native_type;
}
/* add a namespace */
static int
raptor_turtle_serialize_declare_namespace_from_namespace(raptor_serializer* serializer,
raptor_namespace *nspace)
{
raptor_turtle_context* context = (raptor_turtle_context*)serializer->context;
int i;
if(context->written_header)
return 1;
for(i = 0; i< raptor_sequence_size(context->namespaces); i++) {
raptor_namespace* ns;
ns = (raptor_namespace*)raptor_sequence_get_at(context->namespaces, i);
/* If prefix is already declared, ignore it */
if(!ns->prefix && !nspace->prefix)
return 1;
if(ns->prefix && nspace->prefix &&
!strcmp((const char*)ns->prefix, (const char*)nspace->prefix))
return 1;
if(ns->uri && nspace->uri &&
raptor_uri_equals(ns->uri, nspace->uri))
return 1;
}
nspace = raptor_new_namespace_from_uri(context->nstack,
nspace->prefix, nspace->uri,
TURTLE_NAMESPACE_DEPTH);
if(!nspace)
return 1;
raptor_sequence_push(context->namespaces, nspace);
return 0;
}
/**
* raptor_id_set_add:
* @set: #raptor_id_set
* @base_uri: base #raptor_uri of identifier
* @id: identifier name
* @id_len: length of identifier
*
* INTERNAL - Add an item to the set.
*
* Return value: <0 on failure, 0 on success, 1 if already present
**/
int
raptor_id_set_add(raptor_id_set* set, raptor_uri *base_uri,
const unsigned char *id, size_t id_len)
{
raptor_base_id_set *base;
char* item;
if(!base_uri || !id || !id_len)
return -1;
base = set->first;
while(base) {
if(raptor_uri_equals(base->uri, base_uri))
break;
base = base->next;
}
if(!base) {
/* a set for this base_uri not found */
base = (raptor_base_id_set*)RAPTOR_CALLOC(raptor_base_id_set, 1,
sizeof(*base));
if(!base)
return -1;
base->world = set->world;
base->uri = raptor_uri_copy(base_uri);
base->tree = raptor_new_avltree((raptor_data_compare_handler)strcmp,
free, 0);
/* Add to the start of the list */
if(set->first)
set->first->prev = base;
/* base->prev = NULL; */
base->next = set->first;
set->first = base;
} else {
/* If not at the start of the list, move there */
if(base != set->first) {
/* remove from the list */
base->prev->next = base->next;
if(base->next)
base->next->prev = base->prev;
/* add at the start of the list */
set->first->prev = base;
base->prev = NULL;
base->next = set->first;
}
}
item = (char*)raptor_avltree_search(base->tree, id);
/* if already there, error */
if(item) {
#if RAPTOR_DEBUG > 1
set->misses++;
#endif
return 1;
}
#if RAPTOR_DEBUG > 1
set->hits++;
#endif
item = (char*)RAPTOR_MALLOC(cstring, id_len+1);
if(!item)
return 1;
memcpy(item, id, id_len + 1);
return raptor_avltree_add(base->tree, item);
}
/*
* 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;
}
unsigned char*
raptor_uri_to_relative_counted_uri_string(raptor_uri *base_uri,
raptor_uri *reference_uri,
size_t *length_p) {
raptor_uri_detail *base_detail=NULL, *reference_detail;
const unsigned char *base, *reference_str, *base_file, *reference_file;
unsigned char *suffix, *cur_ptr;
size_t base_len, reference_len, reference_file_len, suffix_len;
unsigned char *result=NULL;
if(!reference_uri)
return NULL;
if(length_p)
*length_p=0;
reference_str=raptor_uri_as_counted_string(reference_uri, &reference_len);
reference_detail=raptor_new_uri_detail(reference_str);
if(!reference_detail)
goto err;
if(!base_uri)
goto buildresult;
base=raptor_uri_as_counted_string(base_uri, &base_len);
base_detail=raptor_new_uri_detail(base);
if(!base_detail)
goto err;
/* Check if the whole URIs are equal */
if(raptor_uri_equals(base_uri, reference_uri)) {
reference_len=0;
goto buildresult;
}
/* Check if scheme and authority of the URIs are equal */
if(base_detail->scheme_len == reference_detail->scheme_len &&
base_detail->authority_len == reference_detail->authority_len &&
!strncmp((const char*)base_detail->scheme,
(const char*)reference_detail->scheme,
base_detail->scheme_len) &&
!strncmp((const char*)base_detail->authority,
(const char*)reference_detail->authority,
base_detail->authority_len)) {
if(!base_detail->path)
goto buildresult;
/* Find the file name components */
base_file = (const unsigned char*)strrchr((const char*)base_detail->path, '/');
if(!base_file)
goto buildresult;
base_file++;
if(!reference_detail->path)
goto buildresult;
reference_file=(const unsigned char*)strrchr((const char*)reference_detail->path, '/');
if(!reference_file)
goto buildresult;
reference_file++;
reference_file_len=reference_detail->path_len -
(reference_file - reference_detail->path);
if(!strcmp((const char*)base_file, (const char*)reference_file)) {
/* If the file names are equal, don't put them in the relative URI */
reference_file=NULL;
reference_file_len=0;
} else if(*base_file && !*reference_file) {
/* If the base file is non-empty, but the reference file is
* empty, use "." as the file name.
*/
reference_file=(const unsigned char*)".";
reference_file_len=1;
}
/* Calculate the length of the suffix (file name + query + fragment) */
suffix_len=reference_file_len + reference_detail->query_len +
reference_detail->fragment_len;
if (reference_detail->query)
suffix_len++; /* add one char for the '?' */
if (reference_detail->fragment)
suffix_len++; /* add one char for the '#' */
/* Assemble the suffix */
suffix=(unsigned char*)RAPTOR_MALLOC(cstring, suffix_len + sizeof(char*));
if(!suffix)
goto err;
cur_ptr=suffix;
if(reference_file) {
memcpy(suffix, reference_file, reference_file_len);
cur_ptr+= reference_file_len;
}
if(reference_detail->query) {
*cur_ptr++='?';
memcpy(cur_ptr, reference_detail->query, reference_detail->query_len);
cur_ptr+= reference_detail->query_len;
}
if(reference_detail->fragment) {
*cur_ptr++='#';
memcpy(cur_ptr, reference_detail->fragment, reference_detail->fragment_len);
cur_ptr+= reference_detail->fragment_len;
}
*cur_ptr=0;
/* Finally, create the full relative path */
result = raptor_uri_path_make_relative_path(base_detail->path,
base_detail->path_len,
reference_detail->path,
reference_detail->path_len,
suffix,
suffix_len,
length_p);
RAPTOR_FREE(cstring, suffix);
}
buildresult:
/* If result is NULL at this point, it means that we were unable to find a
relative URI, so we'll return a full absolute URI instead. */
if(!result) {
result=(unsigned char*)RAPTOR_MALLOC(cstring, reference_len + sizeof(char*));
if(result) {
if(reference_len)
memcpy(result, reference_str, reference_len);
result[reference_len] = 0;
if(length_p)
*length_p=reference_len;
}
}
err:
if(base_detail)
raptor_free_uri_detail(base_detail);
raptor_free_uri_detail(reference_detail);
return result;
}
/* return 0 to abort visit */
static int
raptor_json_serialize_avltree_visit(int depth, void* data, void *user_data)
{
raptor_serializer* serializer = (raptor_serializer*)user_data;
raptor_json_context* context = (raptor_json_context*)serializer->context;
raptor_statement* statement = (raptor_statement*)data;
raptor_statement* s1 = statement;
raptor_statement* s2 = context->last_statement;
int new_subject = 0;
int new_predicate = 0;
if(s2) {
new_subject = !raptor_term_equals(s1->subject, s2->subject);
if(new_subject) {
/* end last predicate */
raptor_json_writer_newline(context->json_writer);
raptor_json_writer_end_block(context->json_writer, ']');
raptor_json_writer_newline(context->json_writer);
/* end last statement */
raptor_json_writer_end_block(context->json_writer, '}');
raptor_json_writer_newline(context->json_writer);
context->need_subject_comma = 1;
context->need_object_comma = 0;
}
} else
new_subject = 1;
if(new_subject) {
if(context->need_subject_comma) {
raptor_iostream_write_byte(',', serializer->iostream);
raptor_json_writer_newline(context->json_writer);
}
/* start triple */
/* subject */
switch(s1->subject->type) {
case RAPTOR_TERM_TYPE_URI:
raptor_json_writer_key_uri_value(context->json_writer,
NULL, 0,
s1->subject->value.uri);
break;
case RAPTOR_TERM_TYPE_BLANK:
raptor_iostream_counted_string_write("\"_:", 3, serializer->iostream);
raptor_string_python_write(s1->subject->value.blank.string, 0,
'"', 2,
serializer->iostream);
raptor_iostream_write_byte('"', serializer->iostream);
break;
case RAPTOR_TERM_TYPE_LITERAL:
case RAPTOR_TERM_TYPE_UNKNOWN:
default:
raptor_log_error_formatted(serializer->world, RAPTOR_LOG_LEVEL_ERROR,
NULL,
"Triple has unsupported subject term type %d",
s1->subject->type);
break;
}
raptor_iostream_counted_string_write(" : ", 3, serializer->iostream);
raptor_json_writer_start_block(context->json_writer, '{');
raptor_json_writer_newline(context->json_writer);
}
/* predicate */
if(context->last_statement) {
if(new_subject)
new_predicate = 1;
else {
new_predicate = !raptor_uri_equals(s1->predicate->value.uri,
s2->predicate->value.uri);
if(new_predicate) {
raptor_json_writer_newline(context->json_writer);
raptor_json_writer_end_block(context->json_writer, ']');
raptor_iostream_write_byte(',', serializer->iostream);
raptor_json_writer_newline(context->json_writer);
}
}
} else
new_predicate = 1;
if(new_predicate) {
/* start predicate */
raptor_json_writer_key_uri_value(context->json_writer,
NULL, 0,
s1->predicate->value.uri);
raptor_iostream_counted_string_write(" : ", 3, serializer->iostream);
raptor_json_writer_start_block(context->json_writer, '[');
raptor_iostream_write_byte(' ', serializer->iostream);
context->need_object_comma = 0;
}
if(context->need_object_comma) {
raptor_iostream_write_byte(',', serializer->iostream);
raptor_json_writer_newline(context->json_writer);
}
/* object */
switch(s1->object->type) {
case RAPTOR_TERM_TYPE_URI:
raptor_json_writer_uri_object(context->json_writer,
s1->object->value.uri);
raptor_json_writer_newline(context->json_writer);
break;
case RAPTOR_TERM_TYPE_LITERAL:
raptor_json_writer_literal_object(context->json_writer,
s1->object->value.literal.string,
s1->object->value.literal.language,
s1->object->value.literal.datatype,
"value", "type");
break;
case RAPTOR_TERM_TYPE_BLANK:
raptor_json_writer_blank_object(context->json_writer,
s1->object->value.blank.string);
raptor_json_writer_newline(context->json_writer);
break;
case RAPTOR_TERM_TYPE_UNKNOWN:
default:
raptor_log_error_formatted(serializer->world, RAPTOR_LOG_LEVEL_ERROR,
NULL,
"Triple has unsupported object term type %d",
s1->object->type);
break;
}
/* end triple */
context->need_object_comma = 1;
context->last_statement = statement;
return 1;
}
/**
* raptor_term_equals:
* @t1: first term
* @t2: second term
*
* Compare a pair of #raptor_term for equality
*
* Return value: non-0 if the terms are equal
*/
int
raptor_term_equals(raptor_term* t1, raptor_term* t2)
{
int d = 0;
if(!t1 || !t2)
return 0;
if(t1->type != t2->type)
return 0;
if(t1 == t2)
return 1;
switch(t1->type) {
case RAPTOR_TERM_TYPE_URI:
d = raptor_uri_equals(t1->value.uri, t2->value.uri);
break;
case RAPTOR_TERM_TYPE_BLANK:
if(t1->value.blank.string_len != t2->value.blank.string_len)
/* different lengths */
break;
d = !strcmp((const char*)t1->value.blank.string,
(const char*)t2->value.blank.string);
break;
case RAPTOR_TERM_TYPE_LITERAL:
if(t1->value.literal.string_len != t2->value.literal.string_len)
/* different lengths */
break;
d = !strcmp((const char*)t1->value.literal.string,
(const char*)t2->value.literal.string);
if(!d)
break;
if(t1->value.literal.language && t2->value.literal.language) {
/* both have a language */
d = !strcmp((const char*)t1->value.literal.language,
(const char*)t2->value.literal.language);
if(!d)
break;
} else if(t1->value.literal.language || t2->value.literal.language) {
/* only one has a language - different */
d = 0;
break;
}
if(t1->value.literal.datatype && t2->value.literal.datatype) {
/* both have a datatype */
d = raptor_uri_equals(t1->value.literal.datatype,
t2->value.literal.datatype);
} else if(t1->value.literal.datatype || t2->value.literal.datatype) {
/* only one has a datatype - different */
d = 0;
}
break;
case RAPTOR_TERM_TYPE_UNKNOWN:
default:
break;
}
return d;
}
/*
* raptor_turtle_emit_subject:
* @serializer: #raptor_serializer object
* @subject: subject node
* @depth: depth into tree
*
* Emit a subject node
*
* Return value: non-0 on failure
**/
static int
raptor_turtle_emit_subject(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;
int blank = 1;
int collection = 0;
int rc = 0;
if(!raptor_abbrev_subject_valid(subject)) return 0;
RAPTOR_DEBUG5("Emitting subject 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(!depth &&
subject->node->term->type == RAPTOR_TERM_TYPE_BLANK &&
subject->node->count_as_subject == 1 &&
subject->node->count_as_object == 1) {
RAPTOR_DEBUG2("Skipping subject node %p\n", subject->node);
return 0;
}
if(raptor_avltree_size(subject->properties) == 0) {
RAPTOR_DEBUG2("Skipping subject node %p\n", subject->node);
return 0;
}
/* check if we can do collection abbreviation */
if(raptor_avltree_size(subject->properties) >= 2) {
raptor_avltree_iterator* iter = NULL;
raptor_abbrev_node* pred1;
raptor_abbrev_node* pred2;
iter = raptor_new_avltree_iterator(subject->properties, NULL, NULL, 1);
if(!iter)
return 1;
pred1 = ((raptor_abbrev_node**)raptor_avltree_iterator_get(iter))[0];
raptor_avltree_iterator_next(iter);
pred2 = ((raptor_abbrev_node**)raptor_avltree_iterator_get(iter))[0];
raptor_free_avltree_iterator(iter);
if(pred1->term->type == RAPTOR_TERM_TYPE_URI &&
pred2->term->type == RAPTOR_TERM_TYPE_URI &&
(
(raptor_uri_equals(pred1->term->value.uri, context->rdf_first_uri) &&
raptor_uri_equals(pred2->term->value.uri, context->rdf_rest_uri))
||
(raptor_uri_equals(pred2->term->value.uri, context->rdf_first_uri) &&
raptor_uri_equals(pred1->term->value.uri, context->rdf_rest_uri))
)
) {
collection = 1;
}
}
/* emit the subject node */
if(subject->node->term->type == RAPTOR_TERM_TYPE_URI) {
rc= raptor_turtle_emit_resource(serializer, subject->node, depth+1);
if(rc)
return rc;
blank = 0;
collection = 0;
} else if(subject->node->term->type == RAPTOR_TERM_TYPE_BLANK) {
if((subject->node->count_as_subject == 1 &&
subject->node->count_as_object == 0) && depth > 1) {
blank = 1;
} else if(subject->node->count_as_object == 0) {
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)"[]");
blank = 0;
} else if(!collection && subject->node->count_as_object > 1) {
/* Referred to (used as an object), so needs a nodeID */
const unsigned char* genid = subject->node->term->value.blank.string;
size_t len = strlen((const char*)genid);
unsigned char* subject_str;
subject_str= RAPTOR_MALLOC(unsigned char*, len + 3);
if(!subject_str)
return 1;
subject_str[0]='_';
subject_str[1]=':';
memcpy(&subject_str[2], genid, len + 1);
raptor_turtle_writer_raw(turtle_writer, subject_str);
RAPTOR_FREE(char*, subject_str);
}
}
if(collection) {
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)"(");
raptor_turtle_writer_increase_indent(turtle_writer);
rc = raptor_turtle_emit_subject_collection_items(serializer, subject, depth+1);
raptor_turtle_writer_decrease_indent(turtle_writer);
raptor_turtle_writer_newline(turtle_writer);
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)")");
} else {
if(blank && depth > 1)
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)"[");
raptor_turtle_writer_increase_indent(turtle_writer);
raptor_turtle_writer_newline(turtle_writer);
raptor_turtle_emit_subject_properties(serializer, subject, depth+1);
raptor_turtle_writer_decrease_indent(turtle_writer);
if(blank && depth > 1) {
raptor_turtle_writer_newline(turtle_writer);
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)"]");
}
}
if(depth == 0) {
/* NOTE: the space before the . here MUST be there or statements
* that end in a numeric literal will be interpreted incorrectly
* (the "." will be parsed as part of the literal and statement
* left unterminated)
*/
raptor_turtle_writer_raw(turtle_writer, (const unsigned char*)" .");
raptor_turtle_writer_newline(turtle_writer);
raptor_turtle_writer_newline(turtle_writer);
}
return rc;
}
/*
* 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(predicate->term->value.uri,
context->rdf_first_uri)) {
raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"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->term->type) {
case RAPTOR_TERM_TYPE_URI:
rv = raptor_turtle_emit_resource(serializer, object, depth+1);
break;
case RAPTOR_TERM_TYPE_LITERAL:
rv = raptor_turtle_emit_literal(serializer, object, depth+1);
break;
case RAPTOR_TERM_TYPE_BLANK:
rv = raptor_turtle_emit_blank(serializer, object, depth+1);
break;
case RAPTOR_TERM_TYPE_UNKNOWN:
default:
raptor_log_error_formatted(serializer->world, RAPTOR_LOG_LEVEL_ERROR,
NULL, "Triple has unsupported term type %d",
object->term->type);
break;
}
/* Return error if emitting something failed above */
if(rv)
return rv;
/* 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(predicate->term->value.uri, context->rdf_rest_uri)) {
raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Malformed collection - second predicate is not rdf:rest");
return 1;
}
if(object->term->type == RAPTOR_TERM_TYPE_BLANK) {
subject = raptor_abbrev_subject_find(context->blanks, object->term);
if(!subject) {
raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"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->term->type != RAPTOR_TERM_TYPE_URI ||
!raptor_uri_equals(object->term->value.uri, context->rdf_nil_uri)) {
raptor_log_error(serializer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Malformed collection - last rdf:rest resource is not rdf:nil");
return 1;
}
break;
}
}
if(iter)
raptor_free_avltree_iterator(iter);
return rv;
}
/**
* raptor_turtle_writer_literal:
* @turtle_writer: Turtle writer object
* @nstack: Namespace stack for making a QName for datatype URI
* @s: literal string to write (SHARED)
* @lang: language tag (may be NULL)
* @datatype: datatype URI (may be NULL)
*
* Write a literal (possibly with lang and datatype) to the Turtle writer.
*
* Return value: non-0 on failure
**/
int
raptor_turtle_writer_literal(raptor_turtle_writer* turtle_writer,
raptor_namespace_stack *nstack,
const unsigned char* s, const unsigned char* lang,
raptor_uri* datatype)
{
/* DBL_MAX = 309 decimal digits */
#define INT_MAX_LEN 309
/* DBL_EPSILON = 52 digits */
#define FRAC_MAX_LEN 52
char* endptr = (char *)s;
int written = 0;
/* typed literal special cases */
if(datatype) {
/* integer */
if(raptor_uri_equals(datatype, turtle_writer->xsd_integer_uri)) {
/* FIXME. Work around that gcc < 4.5 cannot disable warn_unused_result */
long gcc_is_stupid = strtol((const char*)s, &endptr, 10);
if(endptr != (char*)s && !*endptr) {
raptor_iostream_string_write(s, turtle_writer->iostr);
/* More gcc madness to 'use' the variable I didn't want */
written = 1 + 0 * (int)gcc_is_stupid;
} else {
raptor_log_error(turtle_writer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Illegal value for xsd:integer literal.");
}
/* double, decimal */
} else if(raptor_uri_equals(datatype, turtle_writer->xsd_double_uri) ||
raptor_uri_equals(datatype, turtle_writer->xsd_decimal_uri)) {
/* FIXME. Work around that gcc < 4.5 cannot disable warn_unused_result */
double gcc_is_doubly_stupid = strtod((const char*)s, &endptr);
if(endptr != (char*)s && !*endptr) {
raptor_iostream_string_write(s, turtle_writer->iostr);
/* More gcc madness to 'use' the variable I didn't want */
written = 1 + 0 * (int)gcc_is_doubly_stupid;
} else {
raptor_log_error(turtle_writer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Illegal value for xsd:double or xsd:decimal literal.");
}
/* boolean */
} else if(raptor_uri_equals(datatype, turtle_writer->xsd_boolean_uri)) {
if(!strcmp((const char*)s, "0") || !strcmp((const char*)s, "false")) {
raptor_iostream_string_write("false", turtle_writer->iostr);
written = 1;
} else if(!strcmp((const char*)s, "1") || !strcmp((const char*)s, "true")) {
raptor_iostream_string_write("true", turtle_writer->iostr);
written = 1;
} else {
raptor_log_error(turtle_writer->world, RAPTOR_LOG_LEVEL_ERROR, NULL,
"Illegal value for xsd:boolean literal.");
}
}
}
if(written)
return 0;
if(raptor_turtle_writer_quoted_counted_string(turtle_writer, s,
strlen((const char*)s)))
return 1;
/* typed literal, not a special case */
if(datatype) {
raptor_qname* qname;
raptor_iostream_string_write("^^", turtle_writer->iostr);
qname = raptor_new_qname_from_namespace_uri(nstack, datatype, 10);
if(qname) {
raptor_turtle_writer_qname(turtle_writer, qname);
raptor_free_qname(qname);
} else
raptor_turtle_writer_reference(turtle_writer, datatype);
} else if(lang) {
/* literal with language tag */
raptor_iostream_write_byte('@', turtle_writer->iostr);
raptor_iostream_string_write(lang, turtle_writer->iostr);
}
return 0;
}
