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Ian Campbell
7d6a65a4fa
hashtable.c has already been copied, forked and modified, there doesn't seem much point in avoiding the same for the header until someone feels motivated to properly refactor. Add comments to the various duplicated files cross-referencing each other for future reference and as a barrier to forking again... Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Ian Jackson <ian.jackson@eu.citrix.com>
110 lines
4.0 KiB
C
110 lines
4.0 KiB
C
/*
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* Copyright (c) 2005, Intel Corp
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* Copyright (c) 2002, Christopher Clark <firstname.lastname@cl.cam.ac.uk>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of the original author; nor the names of any contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* There are duplicates of this code in:
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* - tools/blktap2/drivers/hashtable_itr.h
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*/
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#ifndef __HASHTABLE_ITR_CWC22__
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#define __HASHTABLE_ITR_CWC22__
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#include "hashtable.h"
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#include "hashtable_private.h" /* needed to enable inlining */
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/*****************************************************************************/
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/* This struct is only concrete here to allow the inlining of two of the
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* accessor functions. */
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struct hashtable_itr
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{
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struct hashtable *h;
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struct entry *e;
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struct entry *parent;
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unsigned int index;
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};
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/*****************************************************************************/
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/* hashtable_iterator
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*/
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struct hashtable_itr *
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hashtable_iterator(struct hashtable *h);
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/*****************************************************************************/
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/* hashtable_iterator_key
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* - return the value of the (key,value) pair at the current position */
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void *hashtable_iterator_key(struct hashtable_itr *i);
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/*****************************************************************************/
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/* value - return the value of the (key,value) pair at the current position */
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void *hashtable_iterator_value(struct hashtable_itr *i);
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/*****************************************************************************/
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/* advance - advance the iterator to the next element
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* returns zero if advanced to end of table */
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int
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hashtable_iterator_advance(struct hashtable_itr *itr);
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/*****************************************************************************/
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/* remove - remove current element and advance the iterator to the next element
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* NB: if you need the value to free it, read it before
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* removing. ie: beware memory leaks!
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* returns zero if advanced to end of table */
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int
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hashtable_iterator_remove(struct hashtable_itr *itr);
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/*****************************************************************************/
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/* search - overwrite the supplied iterator, to point to the entry
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* matching the supplied key.
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h points to the hashtable to be searched.
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* returns zero if not found. */
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int
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hashtable_iterator_search(struct hashtable_itr *itr,
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struct hashtable *h, void *k);
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#define DEFINE_HASHTABLE_ITERATOR_SEARCH(fnname, keytype) \
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int fnname (struct hashtable_itr *i, struct hashtable *h, keytype *k) \
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{ \
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return (hashtable_iterator_search(i,h,k)); \
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}
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#endif /* __HASHTABLE_ITR_CWC22__*/
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