Path: utzoo!utgpu!water!watmath!clyde!rutgers!mcnc!rti!xyzzy!jonesjg
From: jonesjg@xyzzy.UUCP (Greg Jones)
Newsgroups: comp.sys.amiga
Subject: Re: A bug in Lattice 4.0
Message-ID: <602@xyzzy.UUCP>
Date: 9 Feb 88 06:08:03 GMT
References: <1070@pembina.UUCP>
Reply-To: jonesjg@xyzzy.UUCP ()
Organization: Data General Corporation, Research Triangle, NC
Lines: 53

In article <1070@pembina.UUCP> andrew@alberta.UUCP (Andrew Folkins) writes:
>
>
>I don't know about you, but if I compile & run this it's a guaranteed visit
>from the guru.
>
>#include <stdio.h>
>#include <string.h>
>
>struct testrec
>  {
>     char string1[16];
>  };
>
>struct testrec trec = { "Test1" };
>
>void main()
>{
>   if (strlen(trec.string1) > 0)
>      printf("length = %d\n", strlen(trec.string1));
>}
>Andrew Folkins        ...ihnp4!alberta!andrew    

    I ran into this last week and spent some time debugging it and have 
determined both the problem and a work around.  I hope to file a STR this
week sometime.  The problem  is in the statement if(strlen(anystring) >0)
I used the omd to disassemble the code to discover an illegal instruction
TST.L A2.  This instruction is being used to check to see if strlen returns
0.  The problem is the addressing mode (address register direct ?) is not
allowed with the TST instruction. (note: all other modes are allowed). 

Well the workaround is easy ...

	1) remember rev 4.00 has strlen as a builtin.

	So the workaround is to bypass the builtin version till
	Lattice fixes the bug by ...

	#ifdef strlen
	#undef strlen
	#endif

	Of course you could change the definition in the string.h
	include file. This would be a better solution, but the compressed
	include files complicates the process.

Hope this helps ...


-- 
				Greg Jones
				Data General, RTP, NC
                                jonesjg@dg-rtp.dg.com
				...!seismo!mcnc!rti!dg-rtp!jonesjg