/**
* librdf_stream_write:
* @stream: the stream object
* @iostr: the iostream to write to
*
* Write a stream of triples to an iostream in a debug format.
*
* This prints the remaining statements of the stream to the given
* #raptor_iostream in a debug format.
*
* Note that after this method is called the stream will be empty so
* that librdf_stream_end() will always be true and
* librdf_stream_next() will always return NULL. The only useful
* operation is to dispose of the stream with the
* librdf_free_stream() destructor.
*
* This method is for debugging and the format of the output should
* not be relied on. In particular, when contexts are used the
* result may be 4 nodes.
*
* Return value: non-0 on failure
**/
int
librdf_stream_write(librdf_stream *stream, raptor_iostream *iostr)
{
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(stream, librdf_stream, 1);
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(iostr, raptor_iostream, 1);
while(!librdf_stream_end(stream)) {
librdf_statement* statement;
librdf_node* context_node;
statement = librdf_stream_get_object(stream);
if(!statement)
break;
raptor_iostream_counted_string_write(" ", 2, iostr);
if(librdf_statement_write(statement, iostr))
return 1;
context_node = librdf_stream_get_context2(stream);
if(context_node) {
raptor_iostream_counted_string_write(" with context ", 14, iostr);
librdf_node_write(context_node, iostr);
}
raptor_iostream_counted_string_write(". \n", 3, iostr);
librdf_stream_next(stream);
}
return 0;
}
/**
* librdf_statement_write:
* @statement: the statement
* @iostr: raptor iostream to write to
*
* Write the statement to an iostream
*
* This method is for debugging and the format of the output should
* not be relied on.
*
* Return value: non-0 on failure
**/
int
librdf_statement_write(librdf_statement *statement, raptor_iostream *iostr)
{
LIBRDF_ASSERT_OBJECT_POINTER_RETURN_VALUE(statement, librdf_statement, 1);
if(!statement)
return 1;
if(librdf_node_write(statement->subject, iostr))
return 1;
raptor_iostream_write_byte(' ', iostr);
if(librdf_node_write(statement->predicate, iostr))
return 1;
raptor_iostream_write_byte(' ', iostr);
if(librdf_node_write(statement->object, iostr))
return 1;
return 0;
}
/*
* Return the specified +node+ as an NTriples string.
*/
VALUE
rleaf_librdf_node_to_string( librdf_node *node )
{
raptor_iostream *stream = NULL;
void *dumped_node = NULL;
int ret;
stream = raptor_new_iostream_to_string( node->world, &dumped_node, NULL, NULL );
if ( !stream ) {
rb_sys_fail( "raptor_new_iostream_to_string" );
}
ret = librdf_node_write( node, stream );
raptor_free_iostream( stream );
if ( ret != 0 )
rb_fatal( "librdf_node_write failed." );
return rb_str_new2( (char *)dumped_node );
}
