page	60,132
name	_parse
title	C	to PARSER interface
;-------------------------------------------------------------------
;
;	MODULE: 	_parse
;
;	PURPOSE:	Supplies an interface between C programs and
;			the DOS 3.3 parser
;
;		      **(Customized for the SUBST utility)
;
;	CALLING FORMAT:
;			parse(&inregs,&outregs);
;
;	DATE:		5-21-87
;
;-------------------------------------------------------------------

;	extrn	sysparse:far

	public	_parse								;AN000;

;-------------------------------------------------------------------

; set for SUBST
; -------------

FarSW	equ	0			; make sysparse be a NEAR proc		;AN000;
TimeSW	equ	0			; Check time format			;AN000;
FileSW	equ	1			; Check file specification		;AN000;
CAPSW	equ	1			; Perform CAPS if specified		;AN000;
CmpxSW	equ	0			; Check complex list			;AN000;
NumSW	equ	0			; Check numeric value			;AN000;
KeySW	equ	0			; Support keywords			;AN000;
SwSW	equ	1			; Support switches			;AN000;
Val1SW	equ	0			; Support value definition 1		;AN000;
Val2SW	equ	0			; Support value definition 2		;AN000;
Val3SW	equ	0			; Support value definition 3		;AN000;
DrvSW	equ	1			; Support drive only format		;AN000;
QusSW	equ	0			; Support quoted string format		;AN000;
;-------------------------------------------------------------------

DGROUP	GROUP	_DATA
PGROUP	GROUP	_TEXT

_DATA	segment byte public 'DATA'	;AN000;
BASESW	=	1			;SPECIFY, PSDATA POINTED TO BY "DS"
INCSW	=	0			;PSDATA.INC IS ALREADY INCLUDED
	INCLUDE PSDATA.INC		;PARSER'S WORK SPACE
_DATA	ends				;AN000;

_TEXT	segment byte public 'CODE'	;AN000;

	ASSUME	CS: PGROUP		;AN000;
	ASSUME	DS: DGROUP		;AN000;

;-------------------------------------------------------------------
include parse.asm			; include the parser			;AN000;
;-------------------------------------------------------------------

_parse	proc	near								;AN000;

	push	bp			; save user's base pointer              ;AN000;
	mov	bp,sp			; set bp to current sp			;AN000;
	push	di			; save some registers			;AN000;
	push	si								;AN000;

;	copy C inregs into proper registers

	mov	di,[bp+4]		; fix di (arg 0)			;AN000;

;-------------------------------------------------------------------

	mov	ax,[di+0ah]		; load di				;AN000;
	push	ax			; the di value from inregs is now on stack;AN000;

	mov	ax,[di+00]		; get inregs.x.ax			;AN000;
	mov	bx,[di+02]		; get inregs.x.bx			;AN000;
	mov	cx,[di+04]		; get inregs.x.cx			;AN000;
	mov	dx,[di+06]		; get inregs.x.dx			;AN000;
	mov	si,[di+08]		; get inregs.x.si			;AN000;
	pop	di			; get inregs.x.di from stack		;AN000;

	push	bp			; save base pointer			;AN000;

;-------------------------------------------------------------------
	call	sysparse		; call the parser			;AN000;
;-------------------------------------------------------------------

	pop	bp			; restore base pointer			;AN000;
	push	di			; the di value from call is now on stack;AN000;
	mov	di,[bp+6]		; fix di (arg 1)			;AN000;

	mov	[di+00],ax		; load outregs.x.ax			;AN000;
	mov	[di+02],bx		; load outregs.x.bx			;AN000;
	mov	[di+04],cx		; load outregs.x.cx			;AN000;
	mov	[di+06],dx		; load outregs.x.dx			;AN000;
	mov	[di+08],si		; load outregs.x.si			;AN000;

	lahf				; get flags into ax			;AN000;
	mov	al,ah			; move into low byte			;AN000;
	mov	[di+0ch],ax		; load outregs.x.cflag			;AN000;

	pop	ax			; get di from stack			;AN000;
	mov	[di+0ah],ax		; load outregs.x.di			;AN000;

;-------------------------------------------------------------------

	pop	si			; restore registers			;AN000;
	pop	di								;AN000;
	mov	sp,bp			; restore sp				;AN000;
	pop	bp			; restore user's bp                     ;AN000;
	ret									;AN000;

_parse	endp									;AN000;

_TEXT	ends				; end code segment			;AN000;
	end									;AN000;

