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125 lines
2.3 KiB
125 lines
2.3 KiB
3 years ago
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/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1999
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* Sleepycat Software. All rights reserved.
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*/
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#include "db_config.h"
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#ifndef lint
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static const char sccsid[] = "@(#)hash_method.c 11.3 (Sleepycat) 9/29/99";
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#endif /* not lint */
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#endif
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#include "db_int.h"
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#include "db_page.h"
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#include "hash.h"
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static int CDB___ham_set_h_ffactor __P((DB *, u_int32_t));
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static int CDB___ham_set_h_hash __P((DB *, u_int32_t(*)(const void *, u_int32_t)));
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static int CDB___ham_set_h_nelem __P((DB *, u_int32_t));
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/*
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* CDB___ham_db_create --
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* Hash specific initialization of the DB structure.
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*
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* PUBLIC: int CDB___ham_db_create __P((DB *));
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*/
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int
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CDB___ham_db_create(dbp)
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DB *dbp;
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{
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HASH *hashp;
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int ret;
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if ((ret = CDB___os_malloc(sizeof(HASH), NULL, &dbp->h_internal)) != 0)
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return (ret);
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hashp = dbp->h_internal;
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hashp->h_nelem = 0; /* Defaults. */
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hashp->h_ffactor = 0;
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hashp->h_hash = NULL;
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dbp->set_h_ffactor = CDB___ham_set_h_ffactor;
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dbp->set_h_hash = CDB___ham_set_h_hash;
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dbp->set_h_nelem = CDB___ham_set_h_nelem;
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return (0);
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}
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/*
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* PUBLIC: int CDB___ham_db_close __P((DB *));
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*/
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int
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CDB___ham_db_close(dbp)
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DB *dbp;
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{
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if (dbp->h_internal == NULL)
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return (0);
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CDB___os_free(dbp->h_internal, sizeof(HASH));
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dbp->h_internal = NULL;
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return (0);
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}
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/*
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* CDB___ham_set_h_ffactor --
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* Set the fill factor.
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*/
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static int
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CDB___ham_set_h_ffactor(dbp, h_ffactor)
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DB *dbp;
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u_int32_t h_ffactor;
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{
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HASH *hashp;
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DB_ILLEGAL_AFTER_OPEN(dbp, "set_h_ffactor");
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DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
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hashp = dbp->h_internal;
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hashp->h_ffactor = h_ffactor;
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return (0);
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}
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/*
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* CDB___ham_set_h_hash --
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* Set the hash function.
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*/
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static int
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CDB___ham_set_h_hash(dbp, func)
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DB *dbp;
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u_int32_t (*func) __P((const void *, u_int32_t));
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{
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HASH *hashp;
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DB_ILLEGAL_AFTER_OPEN(dbp, "set_h_hash");
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DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
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hashp = dbp->h_internal;
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hashp->h_hash = func;
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return (0);
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}
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/*
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* CDB___ham_set_h_nelem --
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* Set the table size.
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*/
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static int
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CDB___ham_set_h_nelem(dbp, h_nelem)
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DB *dbp;
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u_int32_t h_nelem;
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{
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HASH *hashp;
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DB_ILLEGAL_AFTER_OPEN(dbp, "set_h_nelem");
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DB_ILLEGAL_METHOD(dbp, DB_OK_HASH);
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hashp = dbp->h_internal;
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hashp->h_nelem = h_nelem;
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return (0);
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}
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