mirror of
https://github.com/xen-project/xen.git
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Keir Fraser
85f5921bdf
Blktap2 port of remus disk driver. Backwards compatable with blktap1 implementation. Signed-off-by: Ryan O'Connor <rjo@cs.ubc.ca> Signed-off-by: Brendan Cully <brendan@cs.ubc.ca>
72 lines
2.4 KiB
C
72 lines
2.4 KiB
C
/* Copyright (C) 2002 Christopher Clark <firstname.lastname@cl.cam.ac.uk> */
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#include "hashtable.h"
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#include "hashtable_private.h"
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#include "hashtable_utility.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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/*****************************************************************************/
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/* hashtable_change
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*
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* function to change the value associated with a key, where there already
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* exists a value bound to the key in the hashtable.
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* Source due to Holger Schemel.
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*
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* */
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int
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hashtable_change(struct hashtable *h, void *k, void *v)
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{
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struct entry *e;
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unsigned int hashvalue, index;
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hashvalue = hash(h,k);
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index = indexFor(h->tablelength,hashvalue);
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e = h->table[index];
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while (NULL != e)
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{
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/* Check hash value to short circuit heavier comparison */
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if ((hashvalue == e->h) && (h->eqfn(k, e->k)))
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{
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free(e->v);
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e->v = v;
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return -1;
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}
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e = e->next;
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}
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return 0;
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}
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/*
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* Copyright (c) 2002, Christopher Clark
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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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