/usr/include/libee/tagbucket.h is in libee-dev 0.3.2-1.
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* @file tagbucket.h
* @brief the tagbucket object
* @class ee_tagbucket tagbucket.h
*
*//*
*
* Libee - An Event Expression Library inspired by CEE
* Copyright 2010-2011 by Rainer Gerhards and Adiscon GmbH.
*
* This file is part of libee.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* A copy of the LGPL v2.1 can be found in the file "COPYING" in this distribution.
*/
#ifndef LIBEE_TAGBUCKET_H_INCLUDED
#define LIBEE_TAGBUCKET_H_INCLUDED
/**
* Internal structure to represent linked list nodes for the tagbucket.
*/
struct ee_tagbucket_listnode {
es_str_t *name;
struct ee_tagbucket_listnode *next;
};
/**
* The tagbucket class, a container to store tags.
*/
struct ee_tagbucket {
unsigned objID; /**< a magic number to prevent some memory adressing errors */
ee_ctx ctx; /**< associated library context */
struct ee_tagbucket_listnode *root; /**< root of our tags list */
struct ee_tagbucket_listnode *tail; /**< list tail to speed up adding nodes */
unsigned refCount;
};
/**
* Constructor for the ee_tagbucket object.
*
* @memberof ee_tagbucket
* @public
*
* @param[in] ctx the library context to use
*
* @return newly created object or NULL if an error occured
*/
struct ee_tagbucket* ee_newTagbucket(ee_ctx ctx);
/**
* Add an additional reference to the tagbucket. Use this whenever
* an additional part of the code needs a READ-ONLY copy of the
* tag bucket. Note: The delete function checks the reference count and
* only deletes if it is down to zero.
*
* @memberof ee_tagbucket
* @public
*
* @param[in] tagbucket the tagbucket to add ref for
*
* @return address of ref-added tagbucket (for convenience)
*/
struct ee_tagbucket* ee_addRefTagbucket(struct ee_tagbucket *tagbucket);
/**
* Destructor for the ee_tagbucket object.
*
* @memberof ee_tagbucket
* @public
*
* @param[in] tagbucket The tagbucket to be discarded.
*/
void ee_deleteTagbucket(struct ee_tagbucket *tagbucket);
/**
* Add a tag (string) to the bucket.
*
* @memberof ee_tagbucket
* @public
*
* @param[in] tagbucket the tagbucket to modify
* @param[in] tagname name of the tag to be added
*
* @return 0 on success, something else otherwise
*/
int ee_addTagToBucket(struct ee_tagbucket *tagbucket, es_str_t *tagname);
/**
* Check if the tagbucket contains a specific tag.
*
* @memberof ee_tagbucket
* @public
*
* @param[in] tagbucket the tagbucket to check
* @param[in] tagname name of the tag
*
* @return 0 if tag not present, something else otherwise
*/
int ee_TagbucketHasTag(struct ee_tagbucket *tagbucket, es_str_t *tagname);
/**
* Iterate over all tags inside a tag bucket.
* On initial entry, cookie must be set to zero. The cookie returned
* from each call must be passed into the next call. If the returned
* cookie is NULL, no more tags are available (this may happen immediately
* if the tag bucket is empty). So the proper terminating condition to
* check for is returned cookie == NULL. The actual return code
* shall only be check for errors. Note that it is NOT permitted and
* can lead to fatal errors if the tagbucket is changed between calls.
* If the tagbucket changes, an initial call with a NULL-cookie must be
* made.
*
* @memberof ee_value
* @public
*
* @param[in] tagbucket tagbucket to process
* @param[in/out] cookie cookie - for details see description
* @param[out] tagname name of tag
* @return 0 if tag not present, something else otherwise
*/
int ee_TagbucketGetNextTag(struct ee_tagbucket *tagbucket, void **cookie, es_str_t **tagname);
#endif /* #ifndef LIBEE_TAGBUCKET_H_INCLUDED */
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