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From: peturr02@ru.is To: gcc-gnats@gcc.gnu.org Subject: libstdc++/10096: Input impossible with basic_filebuf with custom traits type. Date: Sat, 15 Mar 2003 10:56:00 -0000 [thread overview] Message-ID: <20030315104732.31786.qmail@sources.redhat.com> (raw) >Number: 10096 >Category: libstdc++ >Synopsis: Input impossible with basic_filebuf with custom traits type. >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Sat Mar 15 10:56:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: peturr02@ru.is >Release: gcc mainline from 20030312 >Organization: >Environment: Red Hat Linux 8.0 >Description: basic_filebuf<CharT, Traits>::sbumpc() returns an endless stream of zeros when Traits is a user-defined traits class. This happens both when the file is closed and when it is open. >How-To-Repeat: See attachment. >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: text/plain; name="instbug2.cc" Content-Disposition: inline; filename="instbug2.cc" #include <fstream> #include <cstring> #undef NDEBUG #include <cassert> class MyTraits : public std::char_traits<char> { }; int main() { using namespace std; const char* name = "tmp"; const char* strlit = "The Grand Wazoo"; streamsize len = strlen(strlit); filebuf fbout; fbout.open(name, ios_base::out | ios_base::trunc); fbout.sputn(strlit, len); fbout.close(); char buf[1024]; basic_filebuf<char, MyTraits> fb; assert(fb.sgetc() == MyTraits::eof()); fb.open("instbug2.cc", ios_base::in); assert(fb.is_open()); assert(fb.sgetc() != MyTraits::eof()); streamsize n = fb.sgetn(buf, sizeof(buf)); assert(n == len); assert(!memcmp(buf, strlit, len)); fb.close(); assert(!fb.is_open()); assert(fb.sgetc() == MyTraits::eof()); return 0; }
next reply other threads:[~2003-03-15 10:56 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-15 10:56 peturr02 [this message] 2003-03-15 14:06 paolo 2003-05-16 20:00 bkoz
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