Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!pilchuck!amc-gw!sigma!flash!bryant
From: bryant@flash.UUCP (Mike Bryant)
Newsgroups: comp.windows.ms
Subject: Re: FAR functions and float types
Message-ID: <59@flash.UUCP>
Date: 12 Sep 89 16:13:20 GMT
References: <246400022@uxa.cso.uiuc.edu>
Reply-To: bryant@flash.UUCP (Mike Bryant)
Organization: Summation Inc, Kirkland WA
Lines: 19

In Microsoft C a formal parameter of type float  is  supposed  to
always  be  promoted to double (in the same way that char is pro-
moted to int). See the discussion in section 7.2.3, Formal Param-
eters,  of  the  Language Reference section of the manual. It ap-
pears that this must be broken based on the behavior you are see-
ing.  Section  5.6.4  states that actual parameters of type float
are always promoted to double (which must be working).

When using the pascal calling  convention  the  callee  pops  the
parameters  from  the  stack  (unlike C where the caller pops the
stack). If you call a function with the wrong number  of  parame-
ters  or the wrong types then the stack is corrupted. Most of the
time this causes a crash of some kind. In your case you are pass-
ing two doubles and the function expects two floats.

You discovered the solution to the bug on your own!
-- 
Mike Bryant      uunet.uu.net!amc!sigma!bryant
Summation Inc.   11335 NE 122nd Way  Kirkland, WA 98034