Re: INT_MIN bug

Article View: comp.bugs.sys5

Article #177

#177

From: karish
Date: Wed, 18 Jul 1990 17:49

29 lines
1381 bytes

In article <1295@tuewsd.win.tue.nl> wsinpdb@lso.win.tue.nl (Paul de Bra) writes:
>In sVr3.2 (on the 386) the file <limits.h> contains the definitions
>#define INT_MIN 	-2147483648
>and
>#define LONG_MIN	-2147483648L
>
>which, according to K&R (second edition) are unsigned (constant) expressions
>in ANSI C.

K&R II, section B11, does not say that the values must be unsigned.

The C Standard specifically requires that they have the appropriate signs:

    2.2.4.2, Numerical Limits

    The values given below shall be replaced by constant expressions
    suitable for use in #if preprocessing directives.  Their
    implementation-defined values shall be equal or greater in
    magnitude (absolute value) to those shown, with the same sign.

    [ ... ]

    INT_MIN                           -32767

    LONG_MIN                     -2147483647
-- 

	Chuck Karish		karish@mindcraft.com
	Mindcraft, Inc.		(415) 323-9000

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Path: arc1-ca.pugleaf.net!utzoo!attcan!uunet!tut.cis.ohio-state.edu!ucbvax!mindcrf.UUCP!karish
From: karish@mindcrf.UUCP
Newsgroups: comp.bugs.sys5
Subject: Re: INT_MIN bug
Summary: Looks OK to me
Keywords: negative constants, overflow
Message-ID: <9007181749.AA16031@mindcrf.mindcraft.com>
Date: 18 Jul 90 17:49:09 GMT
References: <1295@tuewsd.win.tue.nl>
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: Mindcraft, Inc.
Lines: 29

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