Date: Wed, 23 Mar 2011 03:48:52 -0700 (PDT) From: Dan Strick <mla_strick@att.net> To: FreeBSD-gnats-submit@FreeBSD.org Cc: dan@mist.nodomain Subject: bin/155886: bc sometimes mangles hexidecimal numbers Message-ID: <201103231048.p2NAmqMY004449@mist.nodomain> Resent-Message-ID: <201103231110.p2NBA1YB090595@freefall.freebsd.org>
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>Number: 155886 >Category: bin >Synopsis: bc sometimes mangles hexidecimal numbers >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Mar 23 11:10:01 UTC 2011 >Closed-Date: >Last-Modified: >Originator: Dan Strick >Release: FreeBSD 8.1-RELEASE i386 >Organization: none >Environment: System: FreeBSD mist 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Sat Aug 14 09:15:14 PDT 2010 root@mist:/usr/src/sys/i386/compile/MIST i386 >Description: The bc program sometimes mangles hexidecimal numbers. I don't really understand what it is doing, but it seems to be incorrect and when it does this it is worse than useless. See below for a reasonably simple example. >How-To-Repeat: Enter the following, beginning at a shell prompt: % /usr/bin/bc obase=16 ibase=16 .1F9A6B50B0F27C00 The bc program responds: bc 1.06 Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc. This is free software with ABSOLUTELY NO WARRANTY. For details type `warranty'. .1F9A6B50B0F27B In other words, I enter the number: .1F9A6B50B0F27C00 and it responds: .1F9A6B50B0F27B I did a little more experimentation. If I set ibase to a value greater than decimal 10 and enter: .1 the bc program responds: 0 The value of obase does not seem to matter. >Fix: unknown >Release-Note: >Audit-Trail: >Unformatted:
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