df6e36e45a
* include/hbhash.h
* contrib/hbcurl/hbcurl.c
* source/common/hbhash.c
* source/compiler/hbident.c
+ Added const to low-level hash support functions.
; NOTE: Przemek, please check me.
* source/rtl/Makefile
* Formatting.
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* The cache for identifiers
|
|
*
|
|
* Copyright 1999 Ryszard Glab <rglab@imid.med.pl>
|
|
* www - http://www.harbour-project.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this software; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
|
|
* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
|
|
*
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "hbhash.h"
|
|
#include "hbcomp.h"
|
|
|
|
#define HB_IDENT_TABLE_SIZE 509UL
|
|
|
|
/* create a new identifier or return the existing one
|
|
*/
|
|
const char * hb_compIdentifierNew( HB_COMP_DECL, const char * szName, int iType )
|
|
{
|
|
const char * szIdent;
|
|
|
|
szIdent = ( const char * ) hb_hashTableFind( HB_COMP_PARAM->pIdentifiers,
|
|
( const void * ) szName );
|
|
if( !szIdent )
|
|
{
|
|
/*
|
|
* In the future we may add direct support for static identifiers
|
|
* so it will not be necessary to allocate separate buffer for them
|
|
*/
|
|
if( iType == HB_IDENT_COPY || iType == HB_IDENT_STATIC )
|
|
szIdent = hb_strdup( szName );
|
|
else
|
|
szIdent = szName;
|
|
|
|
hb_hashTableAdd( HB_COMP_PARAM->pIdentifiers,
|
|
( const void * ) szIdent, ( const void * ) szIdent );
|
|
}
|
|
else if( iType == HB_IDENT_FREE )
|
|
hb_xfree( ( void * ) szName );
|
|
|
|
return szIdent;
|
|
}
|
|
|
|
/* returns a hash key */
|
|
static HB_HASH_FUNC( hb_comp_IdentKey ) /* ULONG func (void *Value, void *Cargo) */
|
|
{
|
|
ULONG ulSum = 0;
|
|
const char *szName = ( char * )Value;
|
|
|
|
while( *szName )
|
|
ulSum += *szName++;
|
|
|
|
HB_SYMBOL_UNUSED( HashPtr );
|
|
HB_SYMBOL_UNUSED( Cargo );
|
|
|
|
return ulSum % HB_IDENT_TABLE_SIZE;
|
|
}
|
|
|
|
/* deletes an identifier */
|
|
static HB_HASH_FUNC( hb_comp_IdentDel )
|
|
{
|
|
hb_xfree( ( void * ) Value );
|
|
HB_SYMBOL_UNUSED( HashPtr );
|
|
HB_SYMBOL_UNUSED( Cargo );
|
|
return 1;
|
|
}
|
|
|
|
/* compares two identifiers */
|
|
static HB_HASH_FUNC( hb_comp_IdentComp )
|
|
{
|
|
HB_SYMBOL_UNUSED( HashPtr );
|
|
return strcmp( (char *)Value, (char *)Cargo );
|
|
}
|
|
|
|
/* initialize the hash table for identifiers */
|
|
void hb_compIdentifierOpen( HB_COMP_DECL )
|
|
{
|
|
HB_COMP_PARAM->pIdentifiers = hb_hashTableCreate( HB_IDENT_TABLE_SIZE,
|
|
hb_comp_IdentKey, hb_comp_IdentDel, hb_comp_IdentComp );
|
|
}
|
|
|
|
/* release identifiers table */
|
|
void hb_compIdentifierClose( HB_COMP_DECL )
|
|
{
|
|
if( HB_COMP_PARAM->pIdentifiers )
|
|
{
|
|
hb_hashTableKill( HB_COMP_PARAM->pIdentifiers );
|
|
HB_COMP_PARAM->pIdentifiers = NULL;
|
|
}
|
|
}
|