зеркало из https://github.com/mozilla/gecko-dev.git
193 строки
6.2 KiB
C
193 строки
6.2 KiB
C
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the Netscape security libraries.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1994-2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#ifndef __SSM_HASHTBL_H__
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#define __SSM_HASHTBL_H__
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#include "nspr.h"
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#include "prtypes.h"
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#include "prmem.h"
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#include "seccomon.h"
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#include "secitem.h"
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#include "ssmdefs.h"
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/* It's a cheap method of hashing; we use the lower HASH_USE_LOW_BITS
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bits of the key to determine what bucket it fits in.
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Oh, what a hack. */
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#define HASH_USE_LOW_BITS 4
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#define HASH_NUM_BUCKETS (1 << HASH_USE_LOW_BITS)
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typedef PRInt32 SSMHashKey;
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struct _ssm_hashbucket
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{
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SSMHashKey *m_keys;
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void **m_values;
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PRIntn m_size;
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PRIntn m_allocSize;
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};
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typedef struct _ssm_hashbucket SSMHashBucket;
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struct _ssm_hashtbl
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{
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SSMHashBucket m_buckets[HASH_NUM_BUCKETS];
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PRIntn m_size;
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PRMonitor * m_hashLock;
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};
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typedef struct _ssm_hashtbl SSMHashTable;
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/************************************************************
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** FUNCTION: SSM_HashInsert
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** DESCRIPTION: Insert a new data item keyed by (key) into (hash).
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** INPUTS:
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** hash
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** The hash into which the item is to be inserted.
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** key
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** The key used to store the item.
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** value
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** The item to be inserted.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashInsert(SSMHashTable *hash, SSMHashKey key, void *value);
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/************************************************************
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** FUNCTION: SSM_HashFind
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** DESCRIPTION: Get the item whose key is (key).
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** INPUTS:
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** hash
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** The hash from which the item is to be retrieved.
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** key
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** The key used to store the item.
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** value
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** The item to be returned. Set to NULL if no suitable
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** item is found.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashFind(SSMHashTable *hash, SSMHashKey key, void **value);
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/************************************************************
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** FUNCTION: SSM_HashRemove
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** DESCRIPTION: Remove from a hash the item whose key is (key).
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** INPUTS:
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** hash
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** The hash from which the item is to be removed.
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** key
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** The key used to store the item.
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** value
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** The value removed from the hash.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashRemove(SSMHashTable *hash, SSMHashKey key, void **value);
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/************************************************************
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** FUNCTION: SSM_HashKeys
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** DESCRIPTION: Get keys for all items stored in the hash.
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** INPUTS:
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** hash
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** The hash from which the keys are to be returned.
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** keys
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** Returns an array of keys. The array is allocated using PR_Malloc.
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** numKeys
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** Returns the number of keys in the array.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashKeys(SSMHashTable *hash, SSMHashKey **keys, PRIntn *numKeys);
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/************************************************************
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** FUNCTION: SSM_HashCount
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** DESCRIPTION: Returns a count of the number of items in the hash.
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** INPUTS:
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** hash
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** The hash to be counted.
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** numItems
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** Returns the number of items in the hash.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashCount(SSMHashTable *hash, PRIntn *numItems);
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/************************************************************
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** FUNCTION: SSM_HashDestroy
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** DESCRIPTION: Destroy a hash. Items in the hash are not freed.
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** INPUTS:
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** hash
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** The hash to be destroyed.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashDestroy(SSMHashTable *hash);
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/************************************************************
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** FUNCTION: SSM_HashCreate
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** DESCRIPTION: Create and initialize a hash.
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p** INPUTS:
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** hash
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** Returns the newly created hash.
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** RETURNS:
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** If successful, returns PR_SUCCESS.
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** If failed, returns either PR_FAILURE or the underlying NSPR error,
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** if it is available.
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**
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*************************************************************/
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SSMStatus SSM_HashCreate(SSMHashTable **hash);
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#endif /* __SSM_HASHTBL_H__ */
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