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From: peturr02@ru.is To: gcc-gnats@gcc.gnu.org Subject: libstdc++/10094: Regression: wfilebuf::showmanyc return value too high. Date: Sat, 15 Mar 2003 10:46:00 -0000 [thread overview] Message-ID: <20030315103606.32499.qmail@sources.redhat.com> (raw) >Number: 10094 >Category: libstdc++ >Synopsis: Regression: wfilebuf::showmanyc return value too high. >Confidential: no >Severity: serious >Priority: medium >Responsible: unassigned >State: open >Class: sw-bug >Submitter-Id: net >Arrival-Date: Sat Mar 15 10:46:00 UTC 2003 >Closed-Date: >Last-Modified: >Originator: peturr02@ru.is >Release: gcc mainline from 20030312 >Organization: >Environment: Red Hat Linux 8.0 >Description: The return value of wfilebuf::showmanyc is only calculated from codecvt::max_length and the number of bytes in the file. This means that when the file contains illegal multibyte sequences, showmanyc promises more characters than underflow can deliver. >How-To-Repeat: See attachment. >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: text/plain; name="showmanycbug2.cc" Content-Disposition: inline; filename="showmanycbug2.cc" #include <fstream> #include <locale> #undef NDEBUG #include <cassert> int main() { using namespace std; const char* name = "tmp"; const char* strlit = "\xc0\xff For What You Dream Of"; filebuf fbout; fbout.open(name, ios_base::out | ios_base::trunc); for (int i = 0; i < BUFSIZ; ++i) fbout.sputc('a'); fbout.sputn(strlit, strlen(strlit)); fbout.close(); wfilebuf fbin; fbin.pubimbue(locale("se_NO.UTF-8")); fbin.open(name, ios_base::in); streamsize n = fbin.in_avail(); while (n > 0) { if (--n == 0) n = fbin.in_avail(); wfilebuf::int_type c = fbin.sbumpc(); assert(c != wfilebuf::traits_type::eof()); } fbin.close(); return 0; }
next reply other threads:[~2003-03-15 10:46 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-03-15 10:46 peturr02 [this message] 2003-03-15 13:32 paolo 2003-03-15 14:56 Pétur Runólfsson 2003-03-16 11:26 Pétur Runólfsson 2003-03-22 15:18 paolo
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