Bug#159804: marked as done (printf("%#Xll",x) can be funny)
Your message dated Sun, 3 Nov 2002 12:01:55 -0800
with message-id <20021103200155.GB25520@aokiconsulting.com>
and subject line Bug#159804: Suppliment (printf("%#Xll",x) can be funny)
has caused the attached Bug report to be marked as done.
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If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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Date: Thu, 5 Sep 2002 21:14:06 -0700
From: Osamu Aoki <debian@aokiconsulting.com>
To: submit@bugs.debian.org
Subject: printf("%#Xll",x) can be funny
Message-ID: <20020906041406.GA29350@aokiconsulting.com>
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Package: gcc
Version: 2.95.4-16
Severity: normal
This could be glibc error. Following program did not act as I expected.
/*
* type cast/formatting bug check for GCC / GLIBC
* (C) Osamu Aoki, Mon Sep 2 17:51:30 UTC 2002
*/
#include <stdio.h>
int
main(int argc, char *argv)
{
unsigned int b;
unsigned long long int d; /* itry also unsigned long int */
b = 0xff;
d = b;
printf("Good %%X %%X %X %X\n", b, d);
printf("Oops %%llX %%llX %llX %llX\n", b, d);
printf("Oops %%llu %%llu %lli %llu\n", b, d);
printf("Oops %%llX %%llX %llX %llX if casted to (unsigned int)\n", (unsigned int) b, (unsigned int) d);
printf("Oops %%llX %%llX %llX %llX if casted to (unsigned long int)\n", (unsigned long int) b, (unsigned long int) d);
printf("Oops %%lX %%lX %lX %lX if casted to (unsigned long long int)\n", (unsigned long long int) b, (unsigned long long int) d);
printf("Good %%llX %%llX %llX %llX if casted to (unsigned long long int)\n", (unsigned long long int) b, (unsigned long long int) d);
return(0);
};
----
Good %X %X FF FF
Oops %llX %llX FF000000FF 80497CC00000000
Oops %llu %llu 1095216660735 577753554639388672
Oops %llX %llX FF000000FF 80497CC00000000 if casted to (unsigned int)
Oops %llX %llX FF000000FF 80497CC00000000 if casted to (unsigned long int)
Oops %lX %lX FF 0 if casted to (unsigned long long int)
Good %llX %llX FF FF if casted to (unsigned long long int)
This is not what I expected.
(Please laugh at me if this is a FAQ of type conversion in C.)
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
ii libc6 2.2.5-11.1 GNU C Library: Shared libraries and Timezone
ii libc6-dev 2.2.5-11.1 GNU C Library: Development Libraries and Hea
ii gcc 2.95.4-16 The GNU C compiler.
--
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+ Osamu Aoki <debian@aokiconsulting.com> @ Cupertino, CA USA +
---------------------------------------
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Date: Sun, 3 Nov 2002 12:01:55 -0800
From: Osamu Aoki <debian@aokiconsulting.com>
To: 159804-done@bugs.debian.org
Subject: Re: Bug#159804: Suppliment (printf("%#Xll",x) can be funny)
Message-ID: <20021103200155.GB25520@aokiconsulting.com>
References: <20020906041406.GA29350@aokiconsulting.com> <handler.159804.B.103128568125428.ack@bugs.debian.org> <20020906055753.GA14298@aokiconsulting.com> <874razlo7h.fsf_-_@Astalo.y2000.kon.iki.fi>
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On Sat, Nov 02, 2002 at 10:18:58PM +0200, Kalle Olavi Niemitalo wrote:
> Osamu Aoki <debian@aokiconsulting.com> writes:
>
> > If BUG 159804 is stupid question rather than a BUG for the maintainer ,
> > please treat this as wishlist for the missing warning. (I think it is a
> > bug.)
>
> gcc -Wall gives plenty of warnings about your program.
Dah, closes this.
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