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* libstdc++/9988: filebuf::overflow writes EOF to file
@ 2003-03-07 11:26 peturr02
0 siblings, 0 replies; 3+ messages in thread
From: peturr02 @ 2003-03-07 11:26 UTC (permalink / raw)
To: gcc-gnats
>Number: 9988
>Category: libstdc++
>Synopsis: filebuf::overflow writes EOF to file
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Mar 07 11:26:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator: peturr02@ru.is
>Release: gcc-3.2.1
>Organization:
>Environment:
Red Hat Linux 8.0
>Description:
If the parameter passed to filebuf::overflow equals traits_type::eof() it is written to the file.
>How-To-Repeat:
See attachment.
>Fix:
Check for EOF before writing character.
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: text/plain; name="overflowbug.cc"
Content-Disposition: inline; filename="overflowbug.cc"
#include <fstream>
#undef NDEBUG
#include <cassert>
class Buf : public std::filebuf
{
public:
int_type pub_overflow(int_type c = traits_type::eof())
{ return std::filebuf::overflow(c); }
};
int main()
{
using namespace std;
Buf fb;
fb.open("tmp", ios_base::out);
fb.sputc('a');
fb.pub_overflow('b');
fb.pub_overflow();
fb.sputc('c');
fb.close();
filebuf fbin;
fbin.open("tmp", ios_base::in);
int c;
c = fbin.sbumpc();
assert(c == 'a');
c = fbin.sbumpc();
assert(c == 'b');
c = fbin.sbumpc();
assert(c == 'c');
c = fbin.sbumpc();
assert(c == filebuf::traits_type::eof());
fbin.close();
return 0;
}
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: libstdc++/9988: filebuf::overflow writes EOF to file
@ 2003-03-09 22:01 paolo
0 siblings, 0 replies; 3+ messages in thread
From: paolo @ 2003-03-09 22:01 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, paolo, peturr02
Synopsis: filebuf::overflow writes EOF to file
State-Changed-From-To: analyzed->closed
State-Changed-By: paolo
State-Changed-When: Sun Mar 9 22:01:47 2003
State-Changed-Why:
Fixed for 3.3 and 3.4.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9988
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: libstdc++/9988: filebuf::overflow writes EOF to file
@ 2003-03-09 20:05 paolo
0 siblings, 0 replies; 3+ messages in thread
From: paolo @ 2003-03-09 20:05 UTC (permalink / raw)
To: gcc-bugs, gcc-prs, nobody, paolo, peturr02
Synopsis: filebuf::overflow writes EOF to file
Responsible-Changed-From-To: unassigned->paolo
Responsible-Changed-By: paolo
Responsible-Changed-When: Sun Mar 9 20:05:11 2003
Responsible-Changed-Why:
Patching.
State-Changed-From-To: open->analyzed
State-Changed-By: paolo
State-Changed-When: Sun Mar 9 20:05:11 2003
State-Changed-Why:
Confirmed.
http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9988
^ permalink raw reply [flat|nested] 3+ messages in thread
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2003-03-07 11:26 libstdc++/9988: filebuf::overflow writes EOF to file peturr02
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