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From: paolo@gcc.gnu.org
To: doerntge@kiwilogic.com, gcc-bugs@gcc.gnu.org,
	gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org
Subject: Re: libstdc++/5424: std::ifstream::operator>>(int&) fails with negative hex numbers
Date: Sat, 19 Jan 2002 14:10:00 -0000	[thread overview]
Message-ID: <20020119221028.7544.qmail@sources.redhat.com> (raw)

Synopsis: std::ifstream::operator>>(int&) fails with negative hex numbers

State-Changed-From-To: analyzed->closed
State-Changed-By: paolo
State-Changed-When: Sat Jan 19 14:10:28 2002
State-Changed-Why:
    In fact, the behaviour of libstdc++-v3 is strictly standard
    conforming. Indeed, according to 22.2.2.2.2, Table 57, the
    stdio equivalent of the conversion is %x, thus leading to
    ffffffd6 for -42 (i.e., equivalent to printf("%x", -42)).
    When the read is attempted it does *not* fit in a signed
    int i, and it fails. You can fix your code by using an
    unsigned int i.
    
    Cheers,
    Paolo.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5424


             reply	other threads:[~2002-01-19 22:10 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-01-19 14:10 paolo [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-01-18 13:51 paolo
2002-01-18  5:04 paolo

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