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page 60,132
name _parse
title C to PARSER interface
;-------------------------------------------------------------------
;
; MODULE: _parse
;
; PURPOSE: Supplies an interface between C programs and
; the DOS 3.30 parser
;
; CALLING FORMAT:
; parse(&inregs,&outregs);
;
; DATE: 5-21-87
;
;-------------------------------------------------------------------
; extrn sysparse:far
public _parse
;-------------------------------------------------------------------
; SET FOR SUBST
; -------------
FarSW equ 0 ; make sysparse be a NEAR proc
TimeSW equ 0 ; Check time format
FileSW equ 1 ; Check file specification
CAPSW equ 1 ; Perform CAPS if specified
CmpxSW equ 0 ; Check complex list
NumSW equ 0 ; Check numeric value
KeySW equ 0 ; Support keywords
SwSW equ 1 ; Support switches
Val1SW equ 0 ; Support value definition 1
Val2SW equ 0 ; Support value definition 2
Val3SW equ 0 ; Support value definition 3
DrvSW equ 1 ; Support drive only format
QusSW equ 0 ; Support quoted string format
;-------------------------------------------------------------------
_DATA segment byte public 'DATA'
_DATA ends
_TEXT segment byte public 'CODE'
ASSUME CS: _TEXT
ASSUME DS: _DATA
;-------------------------------------------------------------------
include parse.asm ; include the parser
;-------------------------------------------------------------------
_parse proc near
push bp ; save user's base pointer
mov bp,sp ; set bp to current sp
push di ; save some registers
push si
; copy C inregs into proper registers
mov di,[bp+4] ; fix di (arg 0)
;-------------------------------------------------------------------
mov ax,[di+0ah] ; load di
push ax ; the di value from inregs is now on stack
mov ax,[di+00] ; get inregs.x.ax
mov bx,[di+02] ; get inregs.x.bx
mov cx,[di+04] ; get inregs.x.cx
mov dx,[di+06] ; get inregs.x.dx
mov si,[di+08] ; get inregs.x.si
pop di ; get inregs.x.di from stack
push bp ; save base pointer
; int 3 ; debugger
;-------------------------------------------------------------------
call sysparse ; call the parser
;-------------------------------------------------------------------
; int 3 ; debugger
pop bp ; restore base pointer
push di ; the di value from call is now on stack
mov di,[bp+6] ; fix di (arg 1)
mov [di+00],ax ; load outregs.x.ax
mov [di+02],bx ; load outregs.x.bx
mov [di+04],cx ; load outregs.x.cx
mov [di+06],dx ; load outregs.x.dx
mov [di+08],si ; load outregs.x.si
xor ax,ax ; clear ax
lahf ; get flags into ax
mov [di+0ch],ax ; load outregs.x.cflag
pop ax ; get di from stack
mov [di+0ah],ax ; load outregs.x.di
;-------------------------------------------------------------------
pop si ; restore registers
pop di
mov sp,bp ; restore sp
pop bp ; restore user's bp
ret
_parse endp
_TEXT ends ; end code segment
end
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