mirror of
https://github.com/cookiengineer/audacity
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143 lines
3.7 KiB
C
143 lines
3.7 KiB
C
/* -*- Mode: c; c-basic-offset: 2 -*-
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*
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* rdf_hash.c - RDF Hash Cursor Implementation
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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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#ifdef HAVE_CONFIG_H
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#include <rdf_config.h>
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#endif
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#ifdef WIN32
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#include <win32_rdf_config.h>
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#endif
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#include <stdio.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <sys/types.h>
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#include <redland.h>
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/* private structure */
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struct librdf_hash_cursor_s {
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librdf_hash *hash;
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void *context;
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};
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/**
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* librdf_new_hash_cursor:
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* @hash: the hash object
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*
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* Constructor - Create a new #librdf_hash_cursor over a #librdf_hash.
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*
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* Return value: a new #librdf_hash_cursor or NULL on failure
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**/
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librdf_hash_cursor*
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librdf_new_hash_cursor (librdf_hash* hash)
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{
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librdf_hash_cursor* cursor;
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void *cursor_context;
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cursor=(librdf_hash_cursor*)LIBRDF_CALLOC(librdf_hash_cursor, 1,
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sizeof(librdf_hash_cursor));
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if(!cursor)
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return NULL;
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cursor_context=(char*)LIBRDF_CALLOC(librdf_hash_cursor_context, 1,
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hash->factory->cursor_context_length);
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if(!cursor_context) {
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LIBRDF_FREE(librdf_hash_cursor, cursor);
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return NULL;
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}
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cursor->hash=hash;
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cursor->context=cursor_context;
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if(hash->factory->cursor_init(cursor->context, hash->context)) {
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librdf_free_hash_cursor(cursor);
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cursor=NULL;
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}
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return cursor;
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}
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/**
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* librdf_free_hash_cursor:
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*
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* Destructor - destroy a #librdf_hash_cursor object.
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*
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* @cursor: hash cursor object
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**/
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void
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librdf_free_hash_cursor (librdf_hash_cursor* cursor)
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{
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if(cursor->context) {
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cursor->hash->factory->cursor_finish(cursor->context);
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LIBRDF_FREE(librdf_hash_cursor_context, cursor->context);
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}
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LIBRDF_FREE(librdf_hash_cursor, cursor);
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}
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int
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librdf_hash_cursor_set(librdf_hash_cursor *cursor,
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librdf_hash_datum *key,
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librdf_hash_datum *value)
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{
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return cursor->hash->factory->cursor_get(cursor->context, key, value,
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LIBRDF_HASH_CURSOR_SET);
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}
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int
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librdf_hash_cursor_get_next_value(librdf_hash_cursor *cursor,
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librdf_hash_datum *key,
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librdf_hash_datum *value)
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{
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return cursor->hash->factory->cursor_get(cursor->context, key, value,
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LIBRDF_HASH_CURSOR_NEXT_VALUE);
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}
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int
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librdf_hash_cursor_get_first(librdf_hash_cursor *cursor,
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librdf_hash_datum *key, librdf_hash_datum *value)
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{
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return cursor->hash->factory->cursor_get(cursor->context, key, value,
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LIBRDF_HASH_CURSOR_FIRST);
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}
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int
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librdf_hash_cursor_get_next(librdf_hash_cursor *cursor, librdf_hash_datum *key,
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librdf_hash_datum *value)
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{
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return cursor->hash->factory->cursor_get(cursor->context, key, value,
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LIBRDF_HASH_CURSOR_NEXT);
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}
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