Category : C++ Source Code
Archive   : VCCRT2.ZIP
Filename : D_GFILE.ASM

page ,132
title d_gfile - Get File Attributes
;***
;d_gfile.asm - Get file attributes
;
; Copyright (c) 1987-1992, Microsoft Corporation. All rights reserved.
;
;Purpose:
; Direct interface to DOS "get file attribute" system call.
;
;*******************************************************************************

include version.inc
.xlist
include cmacros.inc
include msdos.inc
.list

sBegin code

assumes cs,code
assumes ds,data

extrn __dosreturn:near

page
;***
;unsigned _dos_getfileattr(path, p_attrib) - Get file attributes
;
;Purpose:
; Direct interface to the DOS "get file attribute"
; system call (int 21h,43h/al=0).
;
;Entry:
; char *path = pointer to pathname of file
; unsigned *p_attrib = area to receive attributes
;
;Exit:
; returns:
; 0 = success
; !0 = failure
; return value = error code returned by DOS
; errno = appropriate mapped value
;Uses:
; BX,CX,DX,ES
;
;Exceptions:
; None
;
;*******************************************************************************

cProc _dos_getfileattr,,<>

parmDP path
parmDP p_attrib

cBegin

;Get pathname of file.

if sizeD
push ds ;save ds
lds dx,[path] ;get pathname of file
else
mov dx,[path] ;get pathname of file
endif

;Issue the getfileattr call
;ds:dx = pathname

mov ax,DOS_filemode SHL 8 ;ah = call / al = 0 = get attr
callos ;get attributes
if sizeD
pop ds ;restore ds
endif
jc return ;if error...

;Return the file attributes to the caller
;cx = file attributes

if sizeD
les bx,[p_attrib] ;get address of attributes area
mov es:[bx],cx ;store the file attributes
else
mov bx,[p_attrib] ;get address of attributes area
mov [bx],cx ;store the file attributes
endif

return:
jmp __dosreturn ; return 0 if successful

cEnd

sEnd
end