Category : C++ Source Code
Archive : VCCRT2.ZIP
Filename : FMSGHDR.ASM
Output of file : FMSGHDR.ASM contained in archive : VCCRT2.ZIP
title fmsghdr - far message handler and finder
;***
;fmsghdr.asm - far message handler and finder
;
; Copyright (c) 1986-1992, Microsoft Corporation. All rights reserved.
;
;Purpose:
; Far message handler and finder.
;
;*******************************************************************************
?DF= 1 ; this is special for c startup
include version.inc
?PLM= 1 ; pascal calling conventions
.xlist
include cmacros.inc
include msdos.inc
include defsegs.inc
.list
CrtDefSegs
CrtDefSegs
codeOFFSET equ offset _TEXT:
fmsgOFFSET equ offset FMGROUP:
sBegin fhdr
assumes ds,data
db '<
stfmsg label byte
sEnd
SBegin fpad
assumes ds,data
dw -1 ; message padding marker
sEnd
sBegin fepad
assumes ds,data
db -1
sEnd
sBegin code
assumes cs,code
assumes ds,data
page
;***
;__FMSG_TEXT(messagenumber) - find message for given message number
;
;Purpose:
; This routine returns a far pointer to the message associated with
; messagenumber. If the message does not exist, then a 0:0 is returned.
;
;Entry:
; ==PASCAL CALLING CONVENTIONS==
; messagenumber = WORD number of desired message
;
;Exit:
; DX:AX = pointer to message text or 0:0 if message doesn't exist
;
;Uses:
;
;Exceptions:
;
;*******************************************************************************
cProc __FMSG_TEXT,
parmW msgt
cBegin
mov ax,FMGROUP
mov ds,ax ; ds = FMGROUP (force it always)
push ds
pop es
mov dx,msgt ; dx = message number
mov si,fmsgOFFSET stfmsg ; start of far messages
tloop:
lodsw ; ax = current message number
cmp ax,dx
je found ; found it - return address
inc ax
xchg ax,si
jz found ; at end and not found - return 0
xchg di,ax
xor ax,ax
mov cx,-1
repne scasb ; skip until 00
mov si,di
jmp tloop ; try next entry
found:
xchg ax,si
cwd ; zero out dx in case NULL
or ax,ax
jz notfound
mov dx,ds ; remember segment selector
notfound:
cEnd
sEnd
end
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