Path: utzoo!utgpu!water!watmath!clyde!bellcore!faline!ulysses!allegra!princeton!udel!gatech!hao!ames!amdcad!sun!pitstop!sundc!seismo!uunet!nuchat!flatline!sugar!peter
From: peter@sugar.UUCP
Newsgroups: comp.sources.bugs
Subject: Re: shar
Keywords: printf word size null pointer
Message-ID: <1414@sugar.UUCP>
Date: 24 Jan 88 07:40:22 GMT
References: <965@ssc.UUCP> <7098@brl-smoke.ARPA>
Organization: Sugar Land UNIX - Houston, TX
Lines: 21
Posted: Sun Jan 24 02:40:22 1988

In article <7098@brl-smoke.ARPA>, gwyn@brl-smoke.ARPA (Doug Gwyn ) writes:
> In article <965@ssc.UUCP> kent@ssc.UUCP (Kent) writes:
> >Somebody elsewhere (in comp.lang.c, maybe) was annoyed about types 
> >like time_t, which pretend to improve portability via data hiding, but 
> >actually make a mess, since we need to know the underlying type anyway.

> For printf purposes, so long as it's known to be an integral type,
> simply always cast the argument to long and use %ld format.

Or run something like this sucker to create a macro file:

	int test;

	test = (time_t)1.05;
	if(test == (time_t)1)
		printf("#define CVT_time_t \"%s\"\n", (sizeof(time_t)==sizeof(long)) ? "%ld" : "%d");
	else
		printf("#define CVT_time_t \"%s\"\n", (sizeof(time_t)==sizeof(float)) ? "%f" : "%lf");
-- 
-- Peter da Silva  `-_-'  ...!hoptoad!academ!uhnix1!sugar!peter
-- Disclaimer: These U aren't mere opinions... these are *values*.