Article View: comp.sys.amiga.tech
Article #6360Re: Tags - How do they work.
From: Dan Zenchelsky
Date: Mon, 05 Nov 1990 19:01
Date: Mon, 05 Nov 1990 19:01
58 lines
2393 bytes
2393 bytes
In article <dillon.6960@overload.Berkeley.CA.US> dillon@overload.Berkeley.CA.US (Matthew Dillon) writes:
>
> One can easily implement one's own routine to convert a stack based
> tags list into an array pointer tags list using VAR ARGS. For
> example, the implementation of SystemTags() would be:
>
> #include <stdio.h>
> #include <stdarg.h>
>
> long
> SystemTags(cmd, ...)
> char *cmd;
> {
> va_list va;
> long error;
>
> va_start(va, cmd);
> error = System(cmd, va);
> va_end(va);
> return(error);
> }
>
>
> -Matt
>
Although I haven't yet tried it, this routine should work for any Tag
based system call:
#include <stdio.h>
#include <stdarg.h>
long CallTags(long (*cmd)(), ...)
{
va_list va;
long error;
va_start(va, cmd);
error = cmd(va);
va_end(va);
return(error);
}
For example: CallTags(System,argv[1],SYS_Input,infile,SYS_Output,outfile,
SYS_Asynch,FALSE,TAG_DONE);
-Dan
--
___________________________________________________________________________
| _______ |________________________________________|
| || |o| Dan Zenchelsky | |
| ||____| | | Any sufficiently advanced bug is |
| | ___ | dzenc@gnu.ai.mit.edu | indistinguishable from a feature. |
| |_|___|_| |______________-- Rich Kulawiec__________|
|__________________________________|________________________________________|
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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!ucsd!ogicse!mintaka!gnu!dzenc From: dzenc@gnu.ai.mit.edu (Dan Zenchelsky) Newsgroups: comp.sys.amiga.tech Subject: Re: Tags - How do they work. Message-ID: <1990Nov5.190110.5100@mintaka.lcs.mit.edu> Date: 5 Nov 90 19:01:10 GMT References: <53246.657345554@atronx.UUCP> <15486@cbmvax.commodore.com> <dillon.6960@overload.Berkeley.CA.US> Sender: daemon@mintaka.lcs.mit.edu (Lucifer Maleficius) Organization: MIT Laboratory for Computer Science Lines: 58