1236 lines
34 KiB
C
1236 lines
34 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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* Base-routines for OOPS system
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*
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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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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/*
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* The following parts are Copyright of the individual authors.
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* www - http://www.harbour-project.org
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*
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* Copyright 1999 Eddie Runia <eddie@runia.com>
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* :CLASSSEL()
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* __clsDelMsg()
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* __clsModMsg()
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* __clsInstSuper()
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* __cls_CntClsData()
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* __cls_CntData()
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* __cls_DecData()
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* __cls_IncData()
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* __objClone()
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* __objHasMsg()
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* __objSendMsg()
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*
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* Copyright 1999 Victor Szel <info@szelvesz.hu>
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* hb___msgEval()
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* HB___CLASSNEW()
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* HB___CLASSINSTANCE()
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* HB___CLASSADD()
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* HB___CLASSNAME()
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* HB___CLASSSEL() (based on hb___msgClsSel())
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*
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* Copyright 1999 Janica Lubos <janica@fornax.elf.stuba.sk>
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* hb_clsDictRealloc()
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*
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* See doc/license.txt for licensing terms.
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*
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*/
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#include "extend.h"
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#include "errorapi.h"
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#include "itemapi.h"
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#include "ctoharb.h"
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#include "hboo.ch"
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typedef struct
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{
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PHB_DYNS pMessage;
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PHB_FUNC pFunction;
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USHORT uiData;
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USHORT uiScope;
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PHB_ITEM pInitValue;
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BYTE bClsDataInitiated;
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} METHOD, * PMETHOD;
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typedef struct
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{
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char * szName;
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USHORT uiDatas;
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USHORT uiDataFirst; /* First uiData from this class */
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PMETHOD pMethods;
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USHORT uiMethods;
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USHORT uiHashKey;
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PHB_ITEM pClassDatas; /* Array for ClassDatas */
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PHB_ITEM pInlines; /* Array for inline codeblocks */
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} CLASS, * PCLASS;
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#define BASE_METHODS 200
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#define BUCKET 4
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#define HASH_KEY ( BASE_METHODS / BUCKET )
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static PCLASS s_pClasses = NULL;
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static USHORT s_uiClasses = 0;
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static PMETHOD s_pMethod = NULL; /* TOFIX: The object engine is not thread safe because of this. */
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static PHB_DYNS s_msgClassName = NULL;
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static PHB_DYNS s_msgClassH = NULL;
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static PHB_DYNS s_msgEval = NULL;
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static PHB_DYNS s_msgClassSel = NULL;
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/* All functions contained in classes.c */
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static void hb_clsDictRealloc( PCLASS pClass );
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static void hb_clsRelease( PCLASS );
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void hb_clsReleaseAll( void );
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char * hb_objGetClsName( PHB_ITEM pObject );
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PHB_FUNC hb_objGetMethod( PHB_ITEM, PHB_SYMB );
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ULONG hb_objHasMsg( PHB_ITEM pObject, char *szString );
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static HARBOUR hb___msgClsH( void );
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static HARBOUR hb___msgClsName( void );
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static HARBOUR hb___msgClsSel( void );
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static HARBOUR hb___msgSuper( void );
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static HARBOUR hb___msgEvalInline( void );
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static HARBOUR hb___msgEval( void );
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static HARBOUR hb___msgVirtual( void );
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static HARBOUR hb___msgGetClsData( void );
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static HARBOUR hb___msgSetClsData( void );
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static HARBOUR hb___msgGetData( void );
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static HARBOUR hb___msgSetData( void );
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/* ================================================ */
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/*
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* hb_clsDictRealloc( PCLASS )
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*
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* Realloc (widen) class
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*/
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static void hb_clsDictRealloc( PCLASS pClass )
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{
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HB_TRACE(HB_TR_DEBUG, ("hb_clsDictRealloc(%p)", pClass));
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if( pClass )
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{
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PMETHOD pNewMethods;
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USHORT uiNewHashKey = pClass->uiHashKey + 20;
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USHORT uiMask = uiNewHashKey * BUCKET;
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USHORT ui;
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pNewMethods = ( PMETHOD ) hb_xgrab( uiNewHashKey * BUCKET * sizeof( METHOD ) );
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memset( pNewMethods, 0, uiNewHashKey * BUCKET * sizeof( METHOD ) );
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for( ui = 0; ui < ( pClass->uiHashKey * BUCKET ); ui++ )
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{
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PHB_DYNS pMessage = ( PHB_DYNS ) pClass->pMethods[ ui ].pMessage;
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if( pMessage )
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{
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USHORT uiAt = ( ( ( unsigned ) pMessage ) % uiNewHashKey ) * BUCKET;
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while( pNewMethods[ uiAt ].pMessage &&
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( pNewMethods[ uiAt ].pMessage != pMessage ) )
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uiAt = ( uiAt == uiMask ) ? 0 : uiAt + 1;
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pNewMethods[ uiAt ] = pClass->pMethods[ ui ];
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}
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}
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pClass->uiHashKey = uiNewHashKey;
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hb_xfree( pClass->pMethods );
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pClass->pMethods = pNewMethods;
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}
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}
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/*
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* hb_clsRelease( <pClass> )
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*
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* Release a class from memory
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*/
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static void hb_clsRelease( PCLASS pClass )
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{
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USHORT uiAt;
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USHORT uiLimit = pClass->uiHashKey * BUCKET;
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PMETHOD pMeth = pClass->pMethods;
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HB_TRACE(HB_TR_DEBUG, ("hb_clsRelease(%p)", pClass));
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for( uiAt = 0; uiAt < uiLimit; uiAt++, pMeth++ ) /* Release initializers */
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{
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if( pMeth->pInitValue )
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hb_itemRelease( pMeth->pInitValue );
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}
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hb_xfree( pClass->szName );
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hb_xfree( pClass->pMethods );
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hb_itemRelease( pClass->pClassDatas );
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hb_itemRelease( pClass->pInlines );
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}
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/*
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* hb_clsReleaseAll()
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*
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* Release all classes
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*/
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void hb_clsReleaseAll( void )
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{
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USHORT uiClass;
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HB_TRACE(HB_TR_DEBUG, ("hb_clsReleaseAll()"));
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for( uiClass = 0; uiClass < s_uiClasses; uiClass++ )
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hb_clsRelease( s_pClasses + uiClass );
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if( s_pClasses )
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hb_xfree( s_pClasses );
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}
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/* ================================================ */
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/*
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* <szName> = hb_objGetClsName( pObject )
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*
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* Get the class name of an object
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*
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*/
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char * hb_objGetClsName( PHB_ITEM pObject )
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{
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char * szClassName;
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HB_TRACE(HB_TR_DEBUG, ("hb_objGetClsName(%p)", pObject));
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if( IS_ARRAY( pObject ) )
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{
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if( ! pObject->item.asArray.value->uiClass )
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szClassName = "ARRAY";
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else
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szClassName =
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( s_pClasses + pObject->item.asArray.value->uiClass - 1 )->szName;
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}
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else /* built in types */
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{
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switch( pObject->type )
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{
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case IT_NIL:
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szClassName = "NIL";
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break;
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case IT_STRING:
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szClassName = "CHARACTER";
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break;
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case IT_BLOCK:
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szClassName = "BLOCK";
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break;
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case IT_SYMBOL:
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szClassName = "SYMBOL";
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break;
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case IT_DATE:
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szClassName = "DATE";
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break;
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case IT_INTEGER:
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case IT_LONG:
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case IT_DOUBLE:
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szClassName = "NUMERIC";
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break;
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case IT_LOGICAL:
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szClassName = "LOGICAL";
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break;
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default:
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szClassName = "UNKNOWN";
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break;
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}
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}
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return szClassName;
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}
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/*
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* <pFunc> = hb_objGetMethod( <pObject>, <pMessage> )
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*
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* Internal function to the function pointer of a message of an object
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*/
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PHB_FUNC hb_objGetMethod( PHB_ITEM pObject, PHB_SYMB pMessage )
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{
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USHORT uiClass;
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PHB_DYNS pMsg = pMessage->pDynSym;
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HB_TRACE(HB_TR_DEBUG, ("hb_objGetMethod(%p, %p)", pObject, pMessage));
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if( pObject->type == IT_ARRAY )
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uiClass = pObject->item.asArray.value->uiClass;
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else
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uiClass = 0;
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if( uiClass && uiClass <= s_uiClasses )
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{
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PCLASS pClass = &s_pClasses[ uiClass - 1 ];
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USHORT uiAt = ( ( ( unsigned ) pMsg ) % pClass->uiHashKey ) * BUCKET;
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USHORT uiMask = pClass->uiHashKey * BUCKET;
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USHORT uiLimit = uiAt ? ( uiAt - 1 ) : ( uiMask - 1 );
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s_pMethod = NULL; /* Current method pointer */
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while( uiAt != uiLimit )
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{
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if( pClass->pMethods[ uiAt ].pMessage == pMsg )
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{
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s_pMethod = pClass->pMethods + uiAt;
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return s_pMethod->pFunction;
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}
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uiAt++;
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if( uiAt == uiMask )
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uiAt = 0;
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}
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}
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if( s_msgClassName == NULL )
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{
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s_msgClassName = hb_dynsymGet( "CLASSNAME" ); /* Standard messages */
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s_msgClassH = hb_dynsymGet( "CLASSH" ); /* Not present in classdef. */
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s_msgClassSel = hb_dynsymGet( "CLASSSEL" );
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s_msgEval = hb_dynsymGet( "EVAL" );
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}
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if( pMsg == s_msgClassName )
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return hb___msgClsName;
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else if( pMsg == s_msgClassH )
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return hb___msgClsH;
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else if( pMsg == s_msgClassSel )
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return hb___msgClsSel;
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else if( pMsg == s_msgEval )
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return hb___msgEval;
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return NULL;
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}
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/*
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* <uPtr> = hb_objHasMsg( <pObject>, <szString> )
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*
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* Check whether <szString> is an existing message for object.
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*
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* <uPtr> should be read as a boolean
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*/
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ULONG hb_objHasMsg( PHB_ITEM pObject, char *szString )
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{
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PHB_DYNS pDynSym = hb_dynsymFindName( szString );
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HB_TRACE(HB_TR_DEBUG, ("hb_objHasMsg(%p, %s)", pObject, szString));
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if( pDynSym )
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return ( ULONG ) hb_objGetMethod( pObject, pDynSym->pSymbol );
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else
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return 0;
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} /* Get funcptr of message */
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/* ================================================ */
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/*
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* __clsAddMsg( <hClass>, <cMessage>, <pFunction>, <nType>, [xInit] )
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*
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* Add a message to the class.
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*
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* <hClass> Class handle
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* <cMessage> Message
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* <pFunction> HB_OO_MSG_METHOD : Pointer to function
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* HB_OO_MSG_DATA : Index number in array
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* HB_OO_MSG_CLASSDATA : Index number in array
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* HB_OO_MSG_INLINE : Code block
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* HB_OO_MSG_SUPER : Handle of super class
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* <nType> see HB_OO_MSG_*
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* <xInit> Optional initializer for DATA
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*/
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HARBOUR HB___CLSADDMSG( void )
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{
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USHORT uiClass = hb_parni( 1 );
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if( uiClass && uiClass <= s_uiClasses )
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{
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PCLASS pClass = &s_pClasses[ uiClass - 1 ];
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PHB_DYNS pMessage = hb_dynsymGet( hb_parc( 2 ) );
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USHORT wType = hb_parni( 4 );
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USHORT uiAt = ( ( ( unsigned ) pMessage ) % pClass->uiHashKey ) * BUCKET;
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USHORT uiMask = pClass->uiHashKey * BUCKET;
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PMETHOD pNewMeth;
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if( wType == HB_OO_MSG_INLINE && hb_param( 3, IT_BLOCK ) == NULL )
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{
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hb_errRT_BASE( EG_ARG, 3000, NULL, "__CLSADDMSG" );
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}
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if( pClass->uiMethods > ( pClass->uiHashKey * BUCKET * 2/3 ) )
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hb_clsDictRealloc( pClass );
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/* Find either the existing message or an open spot for a new message */
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while( pClass->pMethods[ uiAt ].pMessage &&
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( pClass->pMethods[ uiAt ].pMessage != pMessage ) )
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uiAt = ( uiAt == uiMask ) ? 0 : uiAt + 1;
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pNewMeth = pClass->pMethods + uiAt;
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if( !pNewMeth->pMessage )
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{
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pNewMeth->pMessage = pMessage;
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pClass->uiMethods++; /* One more message */
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}
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switch( wType )
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{
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case HB_OO_MSG_METHOD:
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pNewMeth->pFunction = ( PHB_FUNC ) hb_parnl( 3 );
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break;
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case HB_OO_MSG_DATA:
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pNewMeth->uiData = hb_parnl( 3 );
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if( pMessage->pSymbol->szName[ 0 ] == '_' )
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pNewMeth->pFunction = hb___msgSetData;
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else
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{
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PHB_ITEM pInit = hb_param( 5, IT_ANY );
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pNewMeth->pFunction = hb___msgGetData;
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if( pInit && ! IS_NIL( pInit ) ) /* Initializer found */
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{
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if( IS_ARRAY( pInit ) )
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pNewMeth->pInitValue = hb_arrayClone( pInit );
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else
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{
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pNewMeth->pInitValue = hb_itemNew( NULL );
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hb_itemCopy( pNewMeth->pInitValue, pInit );
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}
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}
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}
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break;
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case HB_OO_MSG_CLASSDATA:
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pNewMeth->uiData = hb_parnl( 3 );
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if( ( USHORT ) hb_arrayLen( pClass->pClassDatas ) < pNewMeth->uiData )
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hb_arraySize( pClass->pClassDatas, pNewMeth->uiData );
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if( pMessage->pSymbol->szName[ 0 ] == '_' )
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pNewMeth->pFunction = hb___msgSetClsData;
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else
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{
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PHB_ITEM pInit = hb_param( 5, IT_ANY );
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pNewMeth->pFunction = hb___msgGetClsData;
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if( pInit && ! IS_NIL( pInit ) ) /* Initializer found */
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{
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if( IS_ARRAY( pInit ) )
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pNewMeth->pInitValue = hb_arrayClone( pInit );
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else
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{
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pNewMeth->pInitValue = hb_itemNew( NULL );
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hb_itemCopy( pNewMeth->pInitValue, pInit );
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}
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}
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}
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break;
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case HB_OO_MSG_INLINE:
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pNewMeth->uiData = hb_arrayLen( pClass->pInlines ) + 1;
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hb_arraySize( pClass->pInlines, pNewMeth->uiData );
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hb_arraySet( pClass->pInlines, pNewMeth->uiData,
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hb_param( 3, IT_BLOCK ) );
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pNewMeth->pFunction = hb___msgEvalInline;
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break;
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case HB_OO_MSG_VIRTUAL:
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pNewMeth->pFunction = hb___msgVirtual;
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break;
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case HB_OO_MSG_SUPER:
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pNewMeth->uiData = hb_parnl( 3 );
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pNewMeth->pFunction = hb___msgSuper;
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break;
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default:
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hb_errInternal( 9999, "Invalid method type from __clsAddMsg", NULL, NULL );
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break;
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}
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}
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}
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/*
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* <hClass> := __clsNew( <cClassName>, <nDatas>, [hSuper] )
|
|
*
|
|
* Create a new class
|
|
*
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|
* <cClassName> Name of the class
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* <nDatas> Number of DATAs in the class
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* <hSuper> Optional handle of superclass
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*/
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HARBOUR HB___CLSNEW( void )
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|
{
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USHORT uiSuper = hb_parni( 3 ); /* Super class present */
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PCLASS pNewCls;
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|
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if( s_pClasses )
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|
s_pClasses = ( PCLASS ) hb_xrealloc( s_pClasses,
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sizeof( CLASS ) * ( s_uiClasses + 1 ) );
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|
else
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s_pClasses = ( PCLASS ) hb_xgrab( sizeof( CLASS ) );
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pNewCls = s_pClasses + s_uiClasses;
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pNewCls->szName = ( char * ) hb_xgrab( hb_parclen( 1 ) + 1 );
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strcpy( pNewCls->szName, hb_parc( 1 ) );
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|
|
|
if( uiSuper )
|
|
{
|
|
PCLASS pSprCls = s_pClasses + uiSuper - 1;
|
|
USHORT uiSize, ui;
|
|
|
|
pNewCls->uiDataFirst = pSprCls->uiDatas;
|
|
pNewCls->uiDatas = pSprCls->uiDatas + hb_parni( 2 );
|
|
pNewCls->uiMethods = pSprCls->uiMethods;
|
|
|
|
/* pNewCls->pClassDatas = hb_arrayClone( pSprCls->pClassDatas ); NO! */
|
|
pNewCls->pClassDatas = hb_itemNew( NULL );
|
|
hb_itemCopy( pNewCls->pClassDatas, pSprCls->pClassDatas );
|
|
|
|
pNewCls->pInlines = hb_arrayClone( pSprCls->pInlines );
|
|
|
|
pNewCls->uiHashKey = pSprCls->uiHashKey;
|
|
|
|
uiSize = pSprCls->uiHashKey * BUCKET * sizeof( METHOD );
|
|
pNewCls->pMethods = ( PMETHOD ) hb_xgrab( uiSize );
|
|
memcpy( pNewCls->pMethods, pSprCls->pMethods, uiSize ); /* Copy all super methods */
|
|
|
|
/* Warning! pInitValue members can not just be copied.
|
|
A new HB_ITEM must be built */
|
|
for( ui = 0; ui < ( USHORT ) ( pSprCls->uiHashKey * BUCKET ); ui++ )
|
|
{
|
|
if( pNewCls->pMethods[ ui ].pInitValue )
|
|
{
|
|
PHB_ITEM pInitValue = hb_itemNew( NULL );
|
|
hb_itemCopy( pInitValue, pNewCls->pMethods[ ui ].pInitValue );
|
|
pNewCls->pMethods[ ui ].pInitValue = pInitValue;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
pNewCls->uiDatas = hb_parni( 2 );
|
|
pNewCls->uiDataFirst = 0;
|
|
pNewCls->pMethods = ( PMETHOD ) hb_xgrab( BASE_METHODS * sizeof( METHOD ) );
|
|
pNewCls->uiMethods = 0;
|
|
pNewCls->uiHashKey = HASH_KEY; /* BUCKET = 4 repetitions */
|
|
|
|
pNewCls->pClassDatas = hb_itemArrayNew( 0 );
|
|
pNewCls->pInlines = hb_itemArrayNew( 0 );
|
|
|
|
memset( pNewCls->pMethods, 0, BASE_METHODS * sizeof( METHOD ) );
|
|
}
|
|
hb_retni( ++s_uiClasses );
|
|
}
|
|
|
|
|
|
/*
|
|
* __clsDelMsg( <oObj>, <cMessage> )
|
|
*
|
|
* Delete message (only for INLINE and METHOD)
|
|
*
|
|
* <oObj> Object
|
|
* <cMessage> Message
|
|
*/
|
|
HARBOUR HB___CLSDELMSG( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
PHB_ITEM pString = hb_param( 2, IT_STRING );
|
|
|
|
if( uiClass && uiClass <= s_uiClasses && pString )
|
|
{
|
|
PHB_DYNS pMsg = hb_dynsymFindName( pString->item.asString.value );
|
|
|
|
if( pMsg )
|
|
{
|
|
PCLASS pClass = s_pClasses + uiClass - 1;
|
|
USHORT uiMask = pClass->uiHashKey * BUCKET;
|
|
USHORT uiAt = ( ( ( unsigned ) pMsg ) % pClass->uiHashKey ) * BUCKET;
|
|
USHORT uiLimit = uiAt ? ( uiAt - 1 ) : ( uiMask - 1 );
|
|
|
|
while( ( uiAt != uiLimit ) &&
|
|
( pClass->pMethods[ uiAt ].pMessage &&
|
|
( pClass->pMethods[ uiAt ].pMessage != pMsg ) ) )
|
|
{
|
|
uiAt++;
|
|
if( uiAt == uiMask )
|
|
uiAt = 0;
|
|
}
|
|
|
|
if( uiAt != uiLimit )
|
|
{ /* Requested method found */
|
|
PHB_FUNC pFunc = pClass->pMethods[ uiAt ].pFunction;
|
|
|
|
if( pFunc == hb___msgEvalInline ) /* INLINE method deleted */
|
|
{
|
|
hb_arrayDel( pClass->pInlines, pClass->pMethods[ uiAt ].uiData );
|
|
/* Delete INLINE block */
|
|
}
|
|
/* Move messages */
|
|
while( pClass->pMethods[ uiAt ].pMessage && uiAt != uiLimit )
|
|
{
|
|
memcpy( pClass->pMethods + uiAt,
|
|
pClass->pMethods + ( ( uiAt == uiMask ) ? 0 : uiAt + 1 ),
|
|
sizeof( METHOD ) );
|
|
uiAt++;
|
|
if( uiAt == uiMask )
|
|
uiAt = 0;
|
|
}
|
|
|
|
memset( pClass->pMethods + uiAt, 0, sizeof( METHOD ) );
|
|
|
|
pClass->uiMethods--; /* Decrease number messages */
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* <oNewObject> := __clsInst( <hClass> )
|
|
*
|
|
* Create a new object from class definition <hClass>
|
|
*/
|
|
HARBOUR HB___CLSINST( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass <= s_uiClasses )
|
|
{
|
|
PCLASS pClass = s_pClasses + ( uiClass - 1 );
|
|
USHORT uiAt;
|
|
USHORT uiLimit = pClass->uiHashKey * BUCKET;
|
|
PMETHOD pMeth = pClass->pMethods; /* Initialize DATA */
|
|
|
|
hb_arrayNew( &hb_stack.Return, pClass->uiDatas );
|
|
hb_stack.Return.item.asArray.value->uiClass = uiClass;
|
|
hb_stack.Return.item.asArray.value->uiPrevCls = NULL;
|
|
|
|
for( uiAt = 0; uiAt < uiLimit; uiAt++, pMeth++ )
|
|
{
|
|
if( pMeth->pInitValue && ! pMeth->bClsDataInitiated )
|
|
{
|
|
if( pMeth->pFunction != hb___msgGetClsData ) /* is a DATA */
|
|
{
|
|
if( IS_ARRAY( pMeth->pInitValue ) )
|
|
{
|
|
PHB_ITEM pInitValue = hb_arrayClone( pMeth->pInitValue );
|
|
hb_itemArrayPut( &hb_stack.Return, pMeth->uiData, pInitValue );
|
|
hb_itemRelease( pInitValue );
|
|
}
|
|
else
|
|
hb_itemArrayPut( &hb_stack.Return, pMeth->uiData,
|
|
pMeth->pInitValue );
|
|
}
|
|
else /* it is a ClassData */
|
|
{
|
|
HB_ITEM init;
|
|
hb_arrayGet( pClass->pClassDatas, pMeth->uiData, &init );
|
|
if( init.type == IT_NIL )
|
|
{
|
|
hb_arraySet( pClass->pClassDatas, pMeth->uiData, pMeth->pInitValue );
|
|
pMeth->bClsDataInitiated = 1;
|
|
}
|
|
hb_itemClear( &init );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* __clsModMsg( <oObj>, <cMessage>, <pFunc> )
|
|
*
|
|
* Modify message (only for INLINE and METHOD)
|
|
*/
|
|
HARBOUR HB___CLSMODMSG( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
PHB_ITEM pString = hb_param( 2, IT_STRING );
|
|
|
|
if( uiClass && uiClass <= s_uiClasses && pString )
|
|
{
|
|
PHB_DYNS pMsg = hb_dynsymFindName( pString->item.asString.value );
|
|
|
|
if( pMsg )
|
|
{
|
|
PCLASS pClass = s_pClasses + uiClass - 1;
|
|
USHORT uiAt = ( ( ( unsigned ) pMsg ) % pClass->uiHashKey ) * BUCKET;
|
|
USHORT uiMask = pClass->uiHashKey * BUCKET;
|
|
USHORT uiLimit = uiAt ? ( uiAt - 1 ) : ( uiMask - 1 );
|
|
|
|
while( ( uiAt != uiLimit ) &&
|
|
( pClass->pMethods[ uiAt ].pMessage &&
|
|
( pClass->pMethods[ uiAt ].pMessage != pMsg ) ) )
|
|
{
|
|
uiAt++;
|
|
if( uiAt == uiMask )
|
|
uiAt = 0;
|
|
}
|
|
|
|
if( uiAt != uiLimit )
|
|
{ /* Requested method found */
|
|
PHB_FUNC pFunc = pClass->pMethods[ uiAt ].pFunction;
|
|
|
|
if( pFunc == hb___msgEvalInline ) /* INLINE method changed */
|
|
{
|
|
PHB_ITEM pBlock = hb_param( 3, IT_BLOCK );
|
|
|
|
if( pBlock == NULL )
|
|
hb_errRT_BASE( EG_ARG, 3000, NULL, "__CLSMODMSG" );
|
|
else
|
|
hb_arraySet( pClass->pInlines, pClass->pMethods[ uiAt ].uiData, pBlock );
|
|
}
|
|
else if( ( pFunc == hb___msgSetData ) || ( pFunc == hb___msgGetData ) )
|
|
{ /* Not allowed for DATA */
|
|
hb_errRT_BASE( EG_ARG, 3004, "Cannot modify a DATA item", "__CLSMODMSG" );
|
|
}
|
|
else /* Modify METHOD */
|
|
pClass->pMethods[ uiAt ].pFunction = ( PHB_FUNC ) hb_parnl( 3 );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* <cClassName> := ClassName( <hClass> )
|
|
*
|
|
* Returns class name of <hClass>
|
|
*/
|
|
HARBOUR HB___OBJGETCLSNAME( void )
|
|
{
|
|
PHB_ITEM pObject = hb_param( 0, IT_OBJECT );
|
|
USHORT uiClass;
|
|
|
|
if( pObject && pObject->item.asArray.value->uiClass )
|
|
{
|
|
uiClass = pObject->item.asArray.value->uiClass;
|
|
|
|
hb_retc( s_pClasses[ uiClass - 1 ].szName );
|
|
}
|
|
else
|
|
{
|
|
uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass <= s_uiClasses )
|
|
hb_retc( s_pClasses[ uiClass - 1 ].szName );
|
|
else
|
|
hb_retc( "" );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* <lRet> := __objHasMsg( <oObj>, <cSymbol> )
|
|
*
|
|
* Is <cSymbol> a valid message for the <oObj>
|
|
*/
|
|
HARBOUR HB___OBJHASMSG( void )
|
|
{
|
|
PHB_ITEM pObject = hb_param( 1, IT_OBJECT );
|
|
PHB_ITEM pString = hb_param( 2, IT_STRING );
|
|
|
|
if( pObject && pString )
|
|
hb_retl( hb_objHasMsg( pObject, pString->item.asString.value ) != 0 );
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3000, NULL, "__OBJHASMSG" );
|
|
}
|
|
|
|
|
|
/*
|
|
* <oNew> := __objClone( <oOld> )
|
|
*
|
|
* Clone an object. Note the similarity with aClone ;-)
|
|
*/
|
|
HARBOUR HB___OBJCLONE( void )
|
|
{
|
|
PHB_ITEM pSrcObject = hb_param( 1, IT_OBJECT );
|
|
|
|
if( pSrcObject )
|
|
{
|
|
PHB_ITEM pDstObject = hb_arrayClone( pSrcObject );
|
|
|
|
hb_itemCopy( &hb_stack.Return, pDstObject );
|
|
hb_itemRelease( pDstObject );
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3001, NULL, "__OBJCLONE" );
|
|
}
|
|
|
|
|
|
/*
|
|
* <xRet> = __objSendMsg( <oObj>, <cSymbol>, <xArg,..>
|
|
*
|
|
* Send a message to an object
|
|
*/
|
|
HARBOUR HB___OBJSENDMSG( void )
|
|
{
|
|
PHB_ITEM pObject = hb_param( 1, IT_OBJECT );
|
|
PHB_ITEM pMessage = hb_param( 2, IT_STRING );
|
|
|
|
if( pMessage && pObject ) /* Object & message passed */
|
|
{
|
|
PHB_DYNS pMsg = hb_dynsymFindName( pMessage->item.asString.value );
|
|
|
|
if( pMsg )
|
|
{
|
|
USHORT uiParam;
|
|
|
|
hb_vmPush( pObject ); /* Push object */
|
|
hb_vmMessage( pMsg->pSymbol );
|
|
/* Push char symbol as message */
|
|
for( uiParam = 3; uiParam <= hb_pcount(); uiParam++ ) /* Push arguments on stack */
|
|
hb_vmPush( hb_param( uiParam, IT_ANY ) );
|
|
hb_vmDo( hb_pcount() - 2 ); /* Execute message */
|
|
}
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3000, NULL, "__OBJSENDMSG" );
|
|
}
|
|
|
|
|
|
/*
|
|
* <hClass> := __clsInstSuper( <cName> )
|
|
*
|
|
* Instance super class and return class handle
|
|
*/
|
|
HARBOUR HB___CLSINSTSUPER( void )
|
|
{
|
|
PHB_ITEM pString = hb_param( 1, IT_STRING );
|
|
BOOL bFound = FALSE;
|
|
|
|
if( pString )
|
|
{
|
|
PHB_DYNS pDynSym = hb_dynsymFind( pString->item.asString.value );
|
|
|
|
if( pDynSym ) /* Find function */
|
|
{
|
|
USHORT uiClass;
|
|
|
|
hb_vmPushSymbol( pDynSym->pSymbol ); /* Push function name */
|
|
hb_vmPushNil();
|
|
hb_vmFunction( 0 ); /* Execute super class */
|
|
|
|
if( !IS_OBJECT( &hb_stack.Return ) )
|
|
{
|
|
hb_errRT_BASE( EG_ARG, 3002, "Super class does not return an object", "__CLSINSTSUPER" );
|
|
}
|
|
|
|
for( uiClass = 0; ! bFound && uiClass < s_uiClasses; uiClass++ )
|
|
{ /* Locate the entry */
|
|
if( hb_stricmp( pString->item.asString.value, s_pClasses[ uiClass ].szName ) == 0 )
|
|
{
|
|
hb_retni( uiClass + 1 ); /* Entry + 1 = hb___msgClsH */
|
|
bFound = TRUE;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
hb_errRT_BASE( EG_ARG, 3003, "Cannot find super class", "__CLSINSTSUPER" );
|
|
}
|
|
if( !bFound )
|
|
hb_retni( 0 );
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_CntClsData( <hClass> )
|
|
*
|
|
* Return number of class datas
|
|
*/
|
|
HARBOUR HB___CLS_CNTCLSDATA( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass )
|
|
{
|
|
PCLASS pClass = &s_pClasses[ uiClass - 1 ];
|
|
hb_retni( hb_arrayLen( pClass->pClassDatas ) );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_CntData( <hClass> )
|
|
*
|
|
* Return number of datas
|
|
*/
|
|
HARBOUR HB___CLS_CNTDATA( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass )
|
|
hb_retni( s_pClasses[ uiClass - 1 ].uiDatas );
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_DecData( <hClass> )
|
|
*
|
|
* Return number of datas and decrease
|
|
*/
|
|
HARBOUR HB___CLS_DECDATA( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass )
|
|
hb_retni( s_pClasses[ uiClass - 1 ].uiDatas-- );
|
|
}
|
|
|
|
|
|
/*
|
|
* <nSeq> = __cls_IncData( <hClass> )
|
|
*
|
|
* Return number of datas and decrease
|
|
*/
|
|
HARBOUR HB___CLS_INCDATA( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
|
|
if( uiClass )
|
|
hb_retni( ++s_pClasses[ uiClass - 1 ].uiDatas );
|
|
}
|
|
|
|
/* NOTE: Undocumented Clipper function */
|
|
|
|
HARBOUR HB___CLASSNEW( void )
|
|
{
|
|
HB___CLSNEW();
|
|
}
|
|
|
|
/* NOTE: Undocumented Clipper function */
|
|
|
|
HARBOUR HB___CLASSINSTANCE( void )
|
|
{
|
|
HB___CLSINST();
|
|
}
|
|
|
|
/* NOTE: Undocumented Clipper function */
|
|
|
|
HARBOUR HB___CLASSADD( void )
|
|
{
|
|
HB___CLSADDMSG();
|
|
}
|
|
|
|
/* NOTE: Undocumented Clipper function */
|
|
|
|
HARBOUR HB___CLASSNAME( void )
|
|
{
|
|
HB___OBJGETCLSNAME();
|
|
}
|
|
|
|
/* NOTE: Undocumented Clipper function */
|
|
/* NOTE: Based on hb___msgClsSel() */
|
|
|
|
HARBOUR HB___CLASSSEL( void )
|
|
{
|
|
USHORT uiClass = hb_parni( 1 );
|
|
PHB_ITEM pReturn = hb_itemNew( NULL );
|
|
|
|
if( uiClass && uiClass <= s_uiClasses )
|
|
{
|
|
PCLASS pClass = &s_pClasses[ uiClass - 1 ];
|
|
USHORT uiLimit = pClass->uiHashKey * BUCKET; /* Number of Hash keys */
|
|
USHORT uiPos = 0;
|
|
USHORT uiAt;
|
|
|
|
hb_itemRelease( pReturn );
|
|
pReturn = hb_itemArrayNew( pClass->uiMethods );
|
|
/* Create a transfer array */
|
|
for( uiAt = 0; uiAt < uiLimit ; uiAt++ )
|
|
{
|
|
PHB_DYNS pMessage = ( PHB_DYNS ) pClass->pMethods[ uiAt ].pMessage;
|
|
if( pMessage ) /* Hash Entry used ? */
|
|
{
|
|
PHB_ITEM pItem = hb_itemPutC( NULL, pMessage->pSymbol->szName );
|
|
/* Add to array */
|
|
hb_itemArrayPut( pReturn, ++uiPos, pItem );
|
|
hb_itemRelease( pItem );
|
|
}
|
|
}
|
|
}
|
|
|
|
hb_itemReturn( pReturn );
|
|
hb_itemRelease( pReturn );
|
|
}
|
|
|
|
/* ================================================ */
|
|
|
|
/*
|
|
* <hClass> := <obj>:ClassH()
|
|
*
|
|
* Returns class handle of <obj>
|
|
*/
|
|
static HARBOUR hb___msgClsH( void )
|
|
{
|
|
if( IS_ARRAY( hb_stack.pBase + 1 ) )
|
|
hb_retni( ( hb_stack.pBase + 1 )->item.asArray.value->uiClass );
|
|
else
|
|
hb_retni( 0 );
|
|
}
|
|
|
|
|
|
/*
|
|
* <cClassName> := <obj>:ClassName()
|
|
*
|
|
* Return class name of <obj>. Can also be used for all types.
|
|
*/
|
|
static HARBOUR hb___msgClsName( void )
|
|
{
|
|
PHB_ITEM pItemRef;
|
|
|
|
if( IS_BYREF( hb_stack.pBase + 1 ) ) /* Variables by reference */
|
|
pItemRef = hb_itemUnRef( hb_stack.pBase + 1 );
|
|
else
|
|
pItemRef = hb_stack.pBase + 1;
|
|
|
|
hb_retc( hb_objGetClsName( pItemRef ) );
|
|
}
|
|
|
|
|
|
/*
|
|
* <aMessages> := <obj>:ClassSel()
|
|
*
|
|
* Returns all the messages in <obj>
|
|
*/
|
|
static HARBOUR hb___msgClsSel( void )
|
|
{
|
|
USHORT uiClass = IS_ARRAY( hb_stack.pBase + 1 ) ?
|
|
( hb_stack.pBase + 1 )->item.asArray.value->uiClass : 0;
|
|
/* Get class word */
|
|
PHB_ITEM pReturn = hb_itemNew( NULL );
|
|
|
|
if( ( ! uiClass ) && IS_BYREF( hb_stack.pBase + 1 ) )
|
|
{ /* Variables by reference */
|
|
PHB_ITEM pItemRef = hb_itemUnRef( hb_stack.pBase + 1 );
|
|
if( IS_ARRAY( pItemRef ) )
|
|
uiClass = pItemRef->item.asArray.value->uiClass;
|
|
}
|
|
|
|
if( uiClass && uiClass <= s_uiClasses )
|
|
{
|
|
PCLASS pClass = &s_pClasses[ uiClass - 1 ];
|
|
USHORT uiLimit = pClass->uiHashKey * BUCKET; /* Number of Hash keys */
|
|
USHORT uiPos = 0;
|
|
USHORT uiAt;
|
|
|
|
hb_itemRelease( pReturn );
|
|
pReturn = hb_itemArrayNew( pClass->uiMethods );
|
|
/* Create a transfer array */
|
|
for( uiAt = 0; uiAt < uiLimit ; uiAt++ )
|
|
{
|
|
PHB_DYNS pMessage = ( PHB_DYNS ) pClass->pMethods[ uiAt ].pMessage;
|
|
if( pMessage ) /* Hash Entry used ? */
|
|
{
|
|
PHB_ITEM pItem = hb_itemPutC( NULL, pMessage->pSymbol->szName );
|
|
/* Add to array */
|
|
hb_itemArrayPut( pReturn, ++uiPos, pItem );
|
|
hb_itemRelease( pItem );
|
|
}
|
|
}
|
|
}
|
|
|
|
hb_itemReturn( pReturn );
|
|
hb_itemRelease( pReturn );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgEvalInline()
|
|
*
|
|
* Internal function executed for inline methods
|
|
*/
|
|
static HARBOUR hb___msgEvalInline( void )
|
|
{
|
|
HB_ITEM block;
|
|
USHORT uiClass = ( hb_stack.pBase + 1 )->item.asArray.value->uiClass;
|
|
USHORT uiParam;
|
|
|
|
hb_arrayGet( s_pClasses[ uiClass - 1 ].pInlines, s_pMethod->uiData, &block );
|
|
|
|
hb_vmPushSymbol( &hb_symEval );
|
|
hb_vmPush( &block );
|
|
hb_vmPush( hb_stack.pBase + 1 ); /* Push self */
|
|
for( uiParam = 1; uiParam <= hb_pcount(); uiParam++ )
|
|
hb_vmPush( hb_param( uiParam, IT_ANY ) );
|
|
hb_vmDo( hb_pcount() + 1 ); /* Self is also an argument */
|
|
|
|
hb_itemClear( &block ); /* Release block */
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgEval()
|
|
*
|
|
* Internal function for the internal EVAL method.
|
|
*/
|
|
static HARBOUR hb___msgEval( void )
|
|
{
|
|
if( IS_BLOCK( hb_stack.pBase + 1 ) )
|
|
{
|
|
USHORT uiParam;
|
|
|
|
hb_vmPushSymbol( &hb_symEval );
|
|
hb_vmPush( hb_stack.pBase + 1 ); /* Push block */
|
|
for( uiParam = 1; uiParam <= hb_pcount(); uiParam++ )
|
|
hb_vmPush( hb_param( uiParam, IT_ANY ) );
|
|
hb_vmDo( hb_pcount() ); /* Self is also an argument */
|
|
}
|
|
else
|
|
{
|
|
PHB_ITEM pResult = hb_errRT_BASE_Subst( EG_NOMETHOD, 1004, NULL, "EVAL" );
|
|
|
|
if( pResult )
|
|
{
|
|
hb_itemReturn( pResult );
|
|
hb_itemRelease( pResult );
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgGetClsData()
|
|
*
|
|
* Internal function to return a CLASSDATA
|
|
*/
|
|
static HARBOUR hb___msgGetClsData( void )
|
|
{
|
|
USHORT uiClass = ( hb_stack.pBase + 1 )->item.asArray.value->uiClass;
|
|
|
|
if( uiClass && uiClass <= s_uiClasses )
|
|
hb_arrayGet( s_pClasses[ uiClass - 1 ].pClassDatas, s_pMethod->uiData, &hb_stack.Return );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgGetData()
|
|
*
|
|
* Internal function to return a DATA
|
|
*/
|
|
static HARBOUR hb___msgGetData( void )
|
|
{
|
|
PHB_ITEM pObject = hb_stack.pBase + 1;
|
|
USHORT uiIndex = s_pMethod->uiData;
|
|
|
|
if( uiIndex > ( USHORT ) hb_arrayLen( pObject ) )
|
|
/* Resize needed */
|
|
hb_arraySize( pObject, uiIndex ); /* Make large enough */
|
|
|
|
hb_arrayGet( pObject, uiIndex, &hb_stack.Return );
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgSuper()
|
|
*
|
|
* Internal function to cast to a super method
|
|
*/
|
|
static HARBOUR hb___msgSuper( void )
|
|
{
|
|
PHB_ITEM pObject = hb_stack.pBase + 1;
|
|
|
|
pObject->item.asArray.value->uiPrevCls = pObject->item.asArray.value->uiClass;
|
|
pObject->item.asArray.value->uiClass = s_pMethod->uiData;
|
|
|
|
hb_itemCopy( &hb_stack.Return, pObject );
|
|
}
|
|
|
|
/*
|
|
* __msgSetClsData()
|
|
*
|
|
* Internal function to set a CLASSDATA
|
|
*/
|
|
static HARBOUR hb___msgSetClsData( void )
|
|
{
|
|
USHORT uiClass = ( hb_stack.pBase + 1 )->item.asArray.value->uiClass;
|
|
PHB_ITEM pReturn = hb_stack.pBase + 2;
|
|
|
|
if( uiClass && uiClass <= s_uiClasses )
|
|
{
|
|
hb_arraySet( s_pClasses[ uiClass - 1 ].pClassDatas,
|
|
s_pMethod->uiData, pReturn );
|
|
hb_itemCopy( &hb_stack.Return, pReturn );
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* __msgSetData()
|
|
*
|
|
* Internal function to set a DATA
|
|
*/
|
|
static HARBOUR hb___msgSetData( void )
|
|
{
|
|
PHB_ITEM pObject = hb_stack.pBase + 1;
|
|
PHB_ITEM pReturn = hb_stack.pBase + 2;
|
|
USHORT uiIndex = s_pMethod->uiData;
|
|
|
|
/* Resize needed ? */
|
|
if( uiIndex > ( USHORT ) hb_arrayLen( pObject ) )
|
|
/* Make large enough */
|
|
hb_arraySize( pObject, uiIndex );
|
|
|
|
hb_arraySet( pObject, uiIndex, pReturn );
|
|
hb_itemCopy( &hb_stack.Return, pReturn );
|
|
}
|
|
|
|
|
|
/* No comment :-) */
|
|
static HARBOUR hb___msgVirtual( void )
|
|
{
|
|
/* hb_ret(); */ /* NOTE: It's safe to comment this out */
|
|
;
|
|
} |