mirror of
https://github.com/cookiengineer/audacity
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99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
/* -*- Mode: c; c-basic-offset: 2 -*-
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*
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* rdf_stream.h - RDF Stream interface and definitions
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*
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* Copyright (C) 2000-2008, David Beckett http://www.dajobe.org/
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* Copyright (C) 2000-2004, University of Bristol, UK http://www.bristol.ac.uk/
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*
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* This package is Free Software and part of Redland http://librdf.org/
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*
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* It is licensed under the following three licenses as alternatives:
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* 1. GNU Lesser General Public License (LGPL) V2.1 or any newer version
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* 2. GNU General Public License (GPL) V2 or any newer version
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* 3. Apache License, V2.0 or any newer version
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*
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* You may not use this file except in compliance with at least one of
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* the above three licenses.
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*
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* See LICENSE.html or LICENSE.txt at the top of this package for the
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* complete terms and further detail along with the license texts for
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* the licenses in COPYING.LIB, COPYING and LICENSE-2.0.txt respectively.
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*
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*
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*/
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#ifndef LIBRDF_STREAM_H
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#define LIBRDF_STREAM_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* librdf_stream_map_handler:
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* @stream: Stream that this map is operating over.
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* @map_context: Map data context pointer.
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* @item: Pointer to the current item in the iteration.
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*
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* Map function for a #librdf_stream map operation.
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*
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* See librdf_stream_add_map().
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*
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* Returns: item in keep the iteration or NULL to remove it
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*/
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typedef librdf_statement* (*librdf_stream_map_handler)(librdf_stream *stream, void *map_context, librdf_statement *item);
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/**
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* librdf_stream_map_free_context_handler:
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* @map_context: Map data context pointer.
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*
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* Free handler function for a #librdf_stream map operation.
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*
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* See librdf_stream_add_map().
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*/
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typedef void (*librdf_stream_map_free_context_handler)(void *map_context);
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#ifdef LIBRDF_INTERNAL
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#include <rdf_stream_internal.h>
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#endif
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/* constructor */
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REDLAND_API
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librdf_stream* librdf_new_stream(librdf_world *world, void* context, int (*is_end_method)(void*), int (*next_method)(void*), void* (*get_method)(void*, int), void (*finished_method)(void*));
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REDLAND_API
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librdf_stream* librdf_new_stream_from_node_iterator(librdf_iterator* iterator, librdf_statement* statement, librdf_statement_part field);
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/* destructor */
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REDLAND_API
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void librdf_free_stream(librdf_stream* stream);
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/* methods */
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REDLAND_API
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int librdf_stream_end(librdf_stream* stream);
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REDLAND_API
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int librdf_stream_next(librdf_stream* stream);
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REDLAND_API
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librdf_statement* librdf_stream_get_object(librdf_stream* stream);
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REDLAND_API
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void* librdf_stream_get_context(librdf_stream* stream);
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REDLAND_API
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int librdf_stream_add_map(librdf_stream* stream, librdf_stream_map_handler map_function, librdf_stream_map_free_context_handler free_context, void *map_context);
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REDLAND_API
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void librdf_stream_print(librdf_stream *stream, FILE *fh);
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REDLAND_API
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librdf_stream* librdf_new_empty_stream(librdf_world *world);
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#ifdef __cplusplus
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}
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#endif
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#endif
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