public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c++/15128] New: Windows seekp/seekg bug
@ 2004-04-25 13:31 g_50 at hotmail dot com
2004-04-25 14:34 ` [Bug c++/15128] " pinskia at gcc dot gnu dot org
2004-04-25 22:20 ` pinskia at gcc dot gnu dot org
0 siblings, 2 replies; 3+ messages in thread
From: g_50 at hotmail dot com @ 2004-04-25 13:31 UTC (permalink / raw)
To: gcc-bugs
The gcc -v output is at the bottom of this. The following small testcase
produces incorrect file output as far back as gcc 3.2 <mingw special 20020817-1>.
Gcc 3.2 included in Mandrake Linux 9.1 produced the expected output in the file.
The following code is compiled on WinXP Pro using: g++ -mno-cygwin database.cpp
-odatabase
//database.cpp
#include <fstream>
#include <iostream>
using std::ios;
typedef unsigned short u_short;
bool NumberAlreadyExists ( std::fstream &rRead, u_short number )
{
bool exist = false;
u_short temp_number;
rRead.seekg( 0 ); //go to start of file
while ( rRead >> temp_number )
{
if ( temp_number == number )
exist = true;
}
if ( rRead.eof() )
{
rRead.clear();
rRead.seekg(0); //go to beginning
}
return exist;
}
int main( )
{
std::fstream data ("data.txt",ios::in|ios::out|ios::trunc);
if (!data) return 1;
u_short four_digit_number;
char continue_loop = 'y';
while ( continue_loop == 'y' )
{
std::cout <<"Enter a positive 4 digit number: ";
std::cin >> four_digit_number;
if ( NumberAlreadyExists ( data, four_digit_number ) )
{
std::cout << "\aNumber Already Exists!!\n";
continue;
}
data.seekp (0, std::ios::end ); // go to end of file
data << four_digit_number << std::endl;
std::cout << "Continue ...?(y/n): ";
std::cin>>continue_loop;
}
data.close();
return 0;
}
/*
Output:
Enter a positive 4 digit number: 1000
Continue ...?(y/n): y
Enter a positive 4 digit number: 1001
Continue ...?(y/n): n
Contents of data.txt:
11000
1001
*/
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/specs
Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld --with-gnu-
as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexe
cdir=/usr/sbin --mandir=/usr/share/man --infodir=/usr/share/info --enable-langua
ges=c,ada,c++,f77,pascal,java,objc --enable-libgcj --enable-threads=posix --with
-system-zlib --enable-nls --without-included-gettext --enable-interpreter --enab
le-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --dis
able-win32-registry --enable-java-gc=boehm --disable-hash-synchronization --verb
ose --target=i686-pc-cygwin --host=i686-pc-cygwin --build=i686-pc-cygwin
Thread model: posix
gcc version 3.3.1 (cygming special)
--
Summary: Windows seekp/seekg bug
Product: gcc
Version: 3.3.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: g_50 at hotmail dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-cygwin
GCC host triplet: i686-pc-cygwin
GCC target triplet: i686-pc-cygwin
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15128
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/15128] Windows seekp/seekg bug
2004-04-25 13:31 [Bug c++/15128] New: Windows seekp/seekg bug g_50 at hotmail dot com
@ 2004-04-25 14:34 ` pinskia at gcc dot gnu dot org
2004-04-25 22:20 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-25 14:34 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-25 13:59 -------
Can you try a newer compiler, the compiler which you are using is a prelease from your vender
(cygwin)?
Can you also next time report it first to cygwin as this could be a bug in cygwin's runtime. (or mingw if
you are using that)?
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15128
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug c++/15128] Windows seekp/seekg bug
2004-04-25 13:31 [Bug c++/15128] New: Windows seekp/seekg bug g_50 at hotmail dot com
2004-04-25 14:34 ` [Bug c++/15128] " pinskia at gcc dot gnu dot org
@ 2004-04-25 22:20 ` pinskia at gcc dot gnu dot org
1 sibling, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-04-25 22:20 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-04-25 20:39 -------
This is a dup of bug 13333.
*** This bug has been marked as a duplicate of 13333 ***
--
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |RESOLVED
Resolution| |DUPLICATE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15128
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2004-04-25 20:39 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2004-04-25 13:31 [Bug c++/15128] New: Windows seekp/seekg bug g_50 at hotmail dot com
2004-04-25 14:34 ` [Bug c++/15128] " pinskia at gcc dot gnu dot org
2004-04-25 22:20 ` pinskia at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).