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/* |
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** Copyright (C) 2002 by Kevin L. Mitchell <klmitch@mit.edu> |
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** |
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** This library is free software; you can redistribute it and/or |
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** modify it under the terms of the GNU Library General Public |
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** License as published by the Free Software Foundation; either |
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** version 2 of the License, or (at your option) any later version. |
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** |
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** This library is distributed in the hope that it will be useful, |
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** but WITHOUT ANY WARRANTY; without even the implied warranty of |
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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** Library General Public License for more details. |
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** |
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** You should have received a copy of the GNU Library General Public |
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** License along with this library; if not, write to the Free |
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** Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
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** MA 02111-1307, USA |
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** |
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** @(#)$Id: ht_free.c,v 1.2 2003/06/12 01:10:04 klmitch Exp $ |
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*/ |
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#include <stdlib.h> |
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|
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#include "dbprim.h" |
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#include "dbprim_int.h" |
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|
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RCSTAG("@(#)$Id: ht_free.c,v 1.2 2003/06/12 01:10:04 klmitch Exp $"); |
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|
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/** \ingroup dbprim_hash |
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* \brief Free memory used by an empty hash table. |
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* |
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* This function releases the memory used by the bucket table in an |
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* empty hash table. |
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* |
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* \param table A pointer to a #hash_table_t. |
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* |
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* \retval DB_ERR_BADARGS An invalid argument was given. |
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* \retval DB_ERR_FROZEN The table is frozen. |
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* \retval DB_ERR_NOTEMPTY The table is not empty. |
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*/ |
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unsigned long |
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ht_free(hash_table_t *table) |
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{ |
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initialize_dbpr_error_table(); /* initialize error table */ |
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|
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if (!ht_verify(table)) /* verify argument */ |
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return DB_ERR_BADARGS; |
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|
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if (table->ht_flags & HASH_FLAG_FREEZE) /* don't free from frozen tables */ |
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return DB_ERR_FROZEN; |
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|
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if (table->ht_count) /* make sure the table's empty */ |
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return DB_ERR_NOTEMPTY; |
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|
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if (!table->ht_modulus && !table->ht_table) /* short-circuit */ |
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return 0; |
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|
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free(table->ht_table); /* free allocated memory */ |
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|
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table->ht_modulus = 0; /* zero the table and modulus */ |
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table->ht_table = 0; |
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|
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return 0; |
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} |
