From: Andreas Schwab <schwab@suse.de>
Cc: emacs-devel@gnu.org
Subject: Re: list-colors-display shows only one color
Date: Wed, 13 Feb 2002 14:31:34 +0100 [thread overview]
Message-ID: <je6651ld8p.fsf@suse.de> (raw)
In-Reply-To: <20020212125234.B5C4.LEKTU@terra.es> (Juanma Barranquero's message of "Tue, 12 Feb 2002 13:18:51 +0100")
Juanma Barranquero <lektu@terra.es> writes:
|> Anway, 1 << 32 is an error because it's obviously going to overflow cap.
The C standard makes this undefined:
6.5.7 Bitwise shift operators
[#3] The integer promotions are performed on each of the operands. The
type of the result is that of the promoted left operand. If the value
of the right operand is negative or is greater than or equal to the
width of the promoted left operand, the behavior is undefined.
Even (1 << 31) is undefined, since that is not representable in a 32-bit
signed int.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE GmbH, Deutschherrnstr. 15-19, D-90429 Nürnberg
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next prev parent reply other threads:[~2002-02-13 13:31 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-02-11 18:12 list-colors-display shows only one color Juanma Barranquero
2002-02-11 19:48 ` Eli Zaretskii
2002-02-11 20:44 ` Andreas Schwab
2002-02-12 5:41 ` Eli Zaretskii
2002-02-12 11:01 ` Andreas Schwab
2002-02-12 11:05 ` Eli Zaretskii
2002-02-13 15:37 ` Richard Stallman
2002-02-13 16:25 ` Andreas Schwab
2002-02-12 9:00 ` Juanma Barranquero
2002-02-12 12:18 ` Juanma Barranquero
2002-02-13 13:31 ` Andreas Schwab [this message]
2002-02-13 14:13 ` Juanma Barranquero
2002-02-13 14:39 ` Andreas Schwab
2002-02-13 15:39 ` Richard Stallman
2002-02-13 17:07 ` Juanma Barranquero
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