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From: Steve.Ihde@f421.n109.z1.fidonet.org (Steve Ihde)
Newsgroups: comp.sys.mac.programmer
Subject: Re: TrapAvailable
Message-ID: <3657.27C748D5@blkcat.fidonet.org>
Date: 24 Feb 91 01:47:27 GMT
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In article <29004@cs.yale.edu> tarr-michael@CS.YALE.EDU (michael tarr)
writes:
mt> When I try to use the call TrapAvailable as per the latest issue of
mt> MacUser to find out if Gestalt is around, Think C 4.0.2 complains that
mt> "TrapAvailable" is undefined.
mt> What am I missing?
 
Well, TrapAvailable() doesn't exist.  Here, however, is the souce code
for it:
 
    Boolean TrapAvailable(short tNumber,TrapType tType)
    {
    
    /* define trap number for old MPW or non-MPW C */
    #ifndef _Unimplemented
    #define _Unimplemented 0xA89F
    #endif
    
    /* Check and see if the trap exists. */
    /* On 64K ROM machines, tType will be ignored. */
    
       return( NGetTrapAddress(tNumber, tType) !=
               GetTrapAddress(_Unimplemented) );
    
    }
 
I think that I got the code either from a Tech note or from the Q&A
stack.  TrapType is an enumerated type of OSTrap and ToolTrap, I
believe.


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        Steve Ihde, Steve.Ihde@f421.n109.z1.fidonet.org
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