937101dd91
*harbour/include/hbclass.ch Now support MI, scoping, fowarding and delegating Also support 10 chars limit by not prefixing the Classname when in 10 chars mode *harbour/include/hbsetup.ch Allow the configuration of Hidden message *harbour/source/rtl/objfunc.prg added function __objDerivedFrom(oSelf, oObj | cClassName) *harbour/source/rtl/tclass.prg Major modification to implement MI & scoping Added message :Super to acces frist superclass object instance Added message :IsDerivedFrom(oObj | cClassName ) (Xbase++ comp.) *harbour/source/vm/proc.c added char * hb_procname( int iLevel, char * szName ) extracted from HB_FUNC( PROCNAME ) to allow it to be called from c HB_FUNC( PROCNAME ) modified to call the previous'one *harbour/source/vm/classes.c Major modification to implement MI & Scoping Added function Sender() used by delegating to allow full polymorphism Added function __CLS_PARAM used by the preprocessor
353 lines
11 KiB
Plaintext
353 lines
11 KiB
Plaintext
/*
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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 Class for internal handling of class creation
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*
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* Copyright 2000 J. Lefebvre <jfl@mafact.com> & RA. Cuylen <rac@mafact.com>
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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 2000 J. Lefebvre <jfl@mafact.com> & RA. Cuylen <rac@mafact.com>
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* Multiple inheritance
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* Support shared class DATA
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* scoping (hidden, protected, readOnly)
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* Use of __cls_param function to allow multiple superclass declaration
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* Suppress of SetType and SetInit not more nedded
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* Delegation and forwarding
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* Reworking of hashing as dicRealloc
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*
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* Copyright 1999 Eddie Runia <eddie@runia.com>
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* Support for inheritance
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* Support for default DATA values
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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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// Harbour Class TClass to build classes
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#include "common.ch"
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#include "hboo.ch"
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//----------------------------------------------------------------------------//
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FUNCTION TClass()
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STATIC s_hClass := NIL
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IF s_hClass == NIL
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s_hClass := __clsNew( "TCLASS", 10 )
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__clsAddMsg( s_hClass, "New" , @New() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "Create" , @Create() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddData" , @AddData() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddMultiData", @AddMultiData(), HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddClassData", @AddClassData(), HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddMultiClsData", @AddMultiClsData(), HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddInline" , @AddInline() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddMethod" , @AddMethod() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "AddVirtual" , @AddVirtual() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "Instance" , @Instance() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "SetOnError" , @SetOnError() , HB_OO_MSG_METHOD )
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__clsAddMsg( s_hClass, "cSuper" , {|Self| iif(::acSuper == NIL .OR. len(::acSuper) == 0, NIL, ::acSuper[1] ) }, HB_OO_MSG_INLINE )
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__clsAddMsg( s_hClass, "_cSuper" , {|Self, xVal| iif(::acSuper == NIL .OR. len(::acSuper) == 0, (::acSuper := { xVal} ), ::acSuper[1] := xVal), xVal }, HB_OO_MSG_INLINE )
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__clsAddMsg( s_hClass, "hClass" , 1, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_hClass" , 1, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "cName" , 2, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_cName" , 2, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "aDatas" , 3, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_aDatas" , 3, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "aMethods" , 4, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_aMethods" , 4, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "aClsDatas" , 5, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_aClsDatas" , 5, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "aInlines" , 6, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_aInlines" , 6, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "aVirtuals" , 7, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_aVirtuals" , 7, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "acSuper" , 8, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_acSuper" , 8, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "nOnError" , 9, HB_OO_MSG_DATA )
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__clsAddMsg( s_hClass, "_nOnError" , 9, HB_OO_MSG_DATA )
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ENDIF
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RETURN __clsInst( s_hClass )
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//----------------------------------------------------------------------------//
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STATIC FUNCTION New( cClassName, xSuper )
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// xSuper is used here as the new preprocessor file (HBCLASS.CH) send here
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// always an array (if no superclass, this will be an empty one)
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// In case of direct class creation (without the help of preprocessor) xSuper can be
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// either NIL or contain the name of the superclass.
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LOCAL Self := QSelf()
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LOCAL nSuper, i
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::acSuper := {}
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nSuper := 0
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If Valtype( xSuper ) == 'A'
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If Len( xSuper ) >= 1
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::acSuper := xSuper
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nSuper := Len( xSuper )
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EndIf
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ElseIf Valtype( xSuper ) == 'C'
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::acSuper := { xSuper }
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nSuper := 1
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EndIf
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::cName := Upper( cClassName )
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::aDatas := {}
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::aMethods := {}
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::aClsDatas := {}
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::aInlines := {}
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::aVirtuals := {}
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For i := 1 to nSuper
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If !ISCHARACTER( ::acSuper[i] )
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exit
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EndIf
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Next
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If i < nSuper
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nSuper := i - 1
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aSize(::acSuper, nSuper)
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EndIf
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RETURN Self
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//----------------------------------------------------------------------------//
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STATIC FUNCTION Create()
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LOCAL Self := QSelf()
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LOCAL n
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LOCAL nLen := Len( ::acSuper )
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LOCAL nLenDatas := Len( ::aDatas ) //Datas local to the class !!
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LOCAL nDataBegin := 0
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LOCAL nClassBegin := 0
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LOCAL hClass
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LOCAL ahSuper := array( nLen )
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Local aoSuper := array( nLen )
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If nLen == 0
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hClass := __clsNew( ::cName, nLenDatas )
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Else // Multi inheritance
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For n := 1 to nLen
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ahSuper[n] := __clsInstSuper( Upper( ::acSuper[n] ) ) // Super handle available
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aoSuper[n] := __clsInst( ahSuper[n] )
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Next
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hClass := __clsNew( ::cName, nLenDatas, ahSuper )
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__clsAddMsg( hClass, Upper( ::acSuper[1] ), ahSuper[1], HB_OO_MSG_SUPER, aoSuper[1], HBCLSTP_CLASS + 1 )
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__clsAddMsg( hClass, "SUPER" , ahSuper[1], HB_OO_MSG_SUPER, aoSuper[1], HBCLSTP_CLASS + 1 )
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__clsAddMsg( hClass, "__SUPER" , ahSuper[1], HB_OO_MSG_SUPER, aoSuper[1], HBCLSTP_CLASS + 1 )
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nDataBegin += __cls_CntData( ahSuper[1] ) // Get offset for new Datas
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nClassBegin += __cls_CntClsData( ahSuper[1] ) // Get offset for new ClassData
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For n := 2 to nLen
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__clsAddMsg( hClass, Upper( ::acSuper[n] ), ahSuper[n], HB_OO_MSG_SUPER, aoSuper[n], HBCLSTP_CLASS + 1 )
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nDataBegin += __cls_CntData( ahSuper[n] ) // Get offset for new DATAs
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nClassBegin += __cls_CntClsData( ahSuper[n] ) // Get offset for new ClassData
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Next
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EndIf
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::hClass := hClass
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FOR n := 1 TO nLenDatas
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__clsAddMsg( hClass, ::aDatas[ n ][ HB_OO_DATA_SYMBOL ] , n + nDataBegin, ;
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HB_OO_MSG_DATA, ::aDatas[ n ][ HB_OO_DATA_VALUE ], ::aDatas[ n ][ HB_OO_DATA_SCOPE ] )
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__clsAddMsg( hClass, "_" + ::aDatas[ n ][ HB_OO_DATA_SYMBOL ] , n + nDataBegin, ;
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HB_OO_MSG_DATA, , ::aDatas[ n ][ HB_OO_DATA_SCOPE ] )
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NEXT
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nLen := Len( ::aMethods )
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FOR n := 1 TO nLen
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__clsAddMsg( hClass, ::aMethods[ n ][ HB_OO_MTHD_SYMBOL ], ::aMethods[ n ][ HB_OO_MTHD_PFUNCTION ], HB_OO_MSG_METHOD, , ::aMethods[ n ][ HB_OO_MTHD_SCOPE ] )
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NEXT
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nLen := Len( ::aClsDatas )
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FOR n := 1 TO nLen
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__clsAddMsg( hClass, ::aClsDatas[ n ][ HB_OO_CLSD_SYMBOL ] , n + nClassBegin,;
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HB_OO_MSG_CLASSDATA, ::aClsDatas[ n ][ HB_OO_CLSD_VALUE ], ::aClsDatas[ n ][ HB_OO_CLSD_SCOPE ] )
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__clsAddMsg( hClass, "_" + ::aClsDatas[ n ][ HB_OO_CLSD_SYMBOL ], n + nClassBegin,;
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HB_OO_MSG_CLASSDATA, , ::aClsDatas[ n ][ HB_OO_CLSD_SCOPE ] )
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NEXT
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nLen := Len( ::aInlines )
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FOR n := 1 TO nLen
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__clsAddMsg( hClass, ::aInlines[ n ][ HB_OO_MTHD_SYMBOL ], ::aInlines[ n ][ HB_OO_MTHD_PFUNCTION ],;
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HB_OO_MSG_INLINE, , ::aInlines[ n ][ HB_OO_MTHD_SCOPE ] )
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NEXT
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nLen := Len( ::aVirtuals )
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FOR n := 1 TO nLen
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__clsAddMsg( hClass, ::aVirtuals[ n ], n, HB_OO_MSG_VIRTUAL )
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NEXT
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if ::nOnError != nil
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__clsAddMsg( hClass, ::nOnError, , HB_OO_MSG_ONERROR )
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endif
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION Instance()
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LOCAL Self := QSelf()
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RETURN __clsInst( ::hClass )
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddData( cData, xInit, cType, nScope ) /* xInit is initializer */
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LOCAL Self := QSelf()
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AAdd( ::aDatas, { cData, xInit, cType, nScope } )
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddMultiData( cType, xInit, nScope, aData )
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Local Self := QSelf()
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Local i
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Local nParam := Len(aData)
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For i := 1 to nParam
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If !ISCHARACTER( aData[i] )
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exit
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EndIf
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Next i
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If i < nParam
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nParam := i - 1
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aSize(aData, nParam)
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Endif
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For i := 1 to nParam
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::AddData( aData[i], xInit, cType, nScope )
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next i
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddClassData( cData, xInit, cType, nScope )
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LOCAL Self := QSelf()
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aAdd( ::aClsDatas, { cData, xInit, cType, nScope } )
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddMultiClsData( cType, xInit, nScope, aData )
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Local Self := QSelf()
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Local i
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Local nParam := Len(aData)
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For i := 1 to nParam
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If !ISCHARACTER( aData[i] )
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exit
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EndIf
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Next i
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If i < nParam
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nParam := i - 1
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aSize(aData, nParam)
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Endif
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For i := 1 to nParam
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::AddClassData( aData[i], xInit, cType, nScope )
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Next i
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddInline( cMethod, bCode, nScope )
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LOCAL Self := QSelf()
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aAdd( ::aInlines, { cMethod, bCode, nScope } )
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddMethod( cMethod, nFuncPtr, nScope )
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LOCAL Self := QSelf()
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aAdd( ::aMethods, { cMethod, nFuncPtr, nScope } )
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION AddVirtual( cMethod )
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LOCAL Self := QSelf()
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aAdd( ::aVirtuals, cMethod )
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RETURN NIL
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//----------------------------------------------------------------------------//
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STATIC FUNCTION SetOnError( nFuncPtr )
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LOCAL Self := QSelf()
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::nOnError := nFuncPtr
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RETURN NIL
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//----------------------------------------------------------------------------//
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