105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* The cache for identifiers
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*
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* Copyright 1999 Ryszard Glab <rglab@imid.med.pl>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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#include <string.h>
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#include "hbhash.h"
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#include "hbcomp.h"
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#define HB_IDENT_TABLE_SIZE 509UL
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static HB_HASH_TABLE_PTR s_comp_Identifiers; /* table of identifiers for reuse */
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/* create a new identifier or return the existing one
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*/
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char * hb_compIdentifierNew( char * szName, BOOL bCopy )
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{
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char * szIdent;
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szIdent = ( char * )hb_hashTableFind( s_comp_Identifiers, (void *) szName );
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if( !szIdent )
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{
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if( bCopy )
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szIdent = hb_strdup( szName );
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else
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szIdent = szName;
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hb_hashTableAdd( s_comp_Identifiers, (void *)szIdent );
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}
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return szIdent;
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}
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/* returns a hash key */
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HB_HASH_FUNC( hb_comp_IdentKey ) /* ULONG func (void *Value, void *Cargo) */
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{
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ULONG ulSum = 0;
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char *szName = ( char * )Value;
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while( *szName )
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ulSum += *szName++;
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HB_SYMBOL_UNUSED( Cargo );
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return ulSum % HB_IDENT_TABLE_SIZE;
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}
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/* deletes an identifier */
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HB_HASH_FUNC( hb_comp_IdentDel )
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{
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hb_xfree( Value );
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HB_SYMBOL_UNUSED( Cargo );
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return 1;
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}
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/* compares two identifiers */
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HB_HASH_FUNC( hb_comp_IdentComp )
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{
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return strcmp( (char *)Value, (char *)Cargo );
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}
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/* initialize the hash table for identifiers */
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void hb_compIdentifierOpen( )
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{
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s_comp_Identifiers = hb_hashTableCreate( HB_IDENT_TABLE_SIZE, hb_comp_IdentKey,
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hb_comp_IdentDel, hb_comp_IdentComp );
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}
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/* release identifiers table */
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void hb_compIdentifierClose( )
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{
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hb_hashTableKill( s_comp_Identifiers );
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}
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