baseobj.a

汇编编程艺术

include stdlib.a

;
; baseobj :	A MASM++ object that is the parent of all objects.
;		Written by Michael A. Griffith and Todd D. Vender		;
; Modification List:
;
; 25 Oct 91  Michael A. Griffith & Todd D. Vender:
;            Created.
;
; 26 Oct 91  Michael A. Griffith:
;
; 3 Nov 91   Michael A. Griffith:
;	     Added public directives and changed constants.
;
; 19 Dec 91  Michael A. Griffith:
;	     Added error method.
;
; 22 Dec 91  Michael A. Griffith:
;	     ldxsi, CR & LF added.
;
; 27 Dec 91  Michael A. Griffith:
;	     Revised object ordering so that parent is a pointer.
;            Removed ldxsi and converted all dx:[si]'s to ds:[si].

IFNDEF BASEOBJ__
BASEOBJ__		EQU	0

;
;
; es2ds- macro to do a "mov ds:si, es:di"
;
es2ds		macro
		push	es
		pop	ds
		mov	si, di
		endm

;
;
; ds2es- macro to do a "mov es:di, ds:si"
;
ds2es		macro
		push	ds
		pop	es
		mov	di, si
		endm
;
;
; esXds- macro to do a "xchg es:di, ds:si" 
;
esXds		macro
		push	es
		push	ds
		pop	es
		pop	ds
		xchg	di, si
		endm

;
;
; dsXes- macro to do a "xchg ds:si, es:di" 
;
dsXes		macro
		push	es
		push	ds
		pop	es
		pop	ds
		xchg	di, si
		endm

;
;
; lesi- macro to do a "les di, constant"
;
lesi		macro	adrs
		mov     di, seg adrs
		mov	es, di
		lea	di, adrs
		endm

;
; ldsi- macro to do a "lds si, constant" operation.
;

ldsi		macro 	adrs
		mov	si, seg adrs
		mov	ds, si
		lea	si, adrs
		endm


;
; ldxi- macro to do a "ldx si, constant" operation.
;

ldxi		macro	adrs
		mov	dx, seg adrs
		lea	si, adrs
		endm

CR			EQU	0Dh
LF			EQU	0Ah

baseobj__methods	STRUC
			new		DD	PROC PTR baseobj__new
			constructor	DD	PROC PTR baseobj__constructor
			destructor	DD	PROC PTR baseobj__destructor
			delete		DD	PROC PTR baseobj__delete
			printself	DD	PROC PTR baseobj__printself
			nameof		DD	PROC PTR baseobj__nameof	
			error		DD	PROC PTR baseobj__error
			regs		DD	PROC PTR baseobj__regs
			; This is the set of primitive functions which
			; are common to all objects.  Do not change the
			; order of these functions.  In objects inheriting
			; the baseobj class, added functions will be
			; placed here.
baseobj__methods	ENDS



baseobj__data		STRUC
			classname	DB	"baseobj", 0
			dynamic		DB	0	
baseobj__data		ENDS



baseobj			STRUC
			parent	 	DD	0		;NULL PARENT
			methods		baseobj__methods <>
			data		baseobj__data <>
baseobj			ENDS

ENDIF ;BASEOBJ__