You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
68 lines
2.1 KiB
68 lines
2.1 KiB
6 years ago
|
2017-07-18 Jonathan Wakely <jwakely@redhat.com>
|
||
|
|
|
||
|
|
PR libstdc++/81395
|
||
|
|
* include/bits/fstream.tcc (basic_filebuf::xsgetn): Don't set buffer
|
||
|
|
pointers for write mode after reading.
|
||
|
|
* testsuite/27_io/basic_filebuf/sgetn/char/81395.cc: New.
|
||
|
|
|
||
|
|
--- libstdc++-v3/include/bits/fstream.tcc (revision 254017)
|
||
|
|
+++ libstdc++-v3/include/bits/fstream.tcc (revision 254018)
|
||
|
|
@@ -699,7 +699,7 @@
|
||
|
|
|
||
|
|
if (__n == 0)
|
||
|
|
{
|
||
|
|
- _M_set_buffer(0);
|
||
|
|
+ // Set _M_reading. Buffer is already in initial 'read' mode.
|
||
|
|
_M_reading = true;
|
||
|
|
}
|
||
|
|
else if (__len == 0)
|
||
|
|
--- libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/81395.cc (nonexistent)
|
||
|
|
+++ libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/81395.cc (revision 254018)
|
||
|
|
@@ -0,0 +1,46 @@
|
||
|
|
+// Copyright (C) 2017 Free Software Foundation, Inc.
|
||
|
|
+//
|
||
|
|
+// This file is part of the GNU ISO C++ Library. This library is free
|
||
|
|
+// software; you can redistribute it and/or modify it under the
|
||
|
|
+// terms of the GNU General Public License as published by the
|
||
|
|
+// Free Software Foundation; either version 3, or (at your option)
|
||
|
|
+// any later version.
|
||
|
|
+
|
||
|
|
+// This library is distributed in the hope that it will be useful,
|
||
|
|
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
+// GNU General Public License for more details.
|
||
|
|
+
|
||
|
|
+// You should have received a copy of the GNU General Public License along
|
||
|
|
+// with this library; see the file COPYING3. If not see
|
||
|
|
+// <http://www.gnu.org/licenses/>.
|
||
|
|
+
|
||
|
|
+// { dg-require-fileio "" }
|
||
|
|
+
|
||
|
|
+// PR libstdc++/81395
|
||
|
|
+
|
||
|
|
+#include <fstream>
|
||
|
|
+#include <cstring> // for std::memset
|
||
|
|
+#include <cstdio> // For BUFSIZ
|
||
|
|
+
|
||
|
|
+using std::memset;
|
||
|
|
+
|
||
|
|
+int main()
|
||
|
|
+{
|
||
|
|
+ {
|
||
|
|
+ std::filebuf fb;
|
||
|
|
+ fb.open("test.txt", std::ios::out);
|
||
|
|
+ char data[BUFSIZ];
|
||
|
|
+ memset(data, 'A', sizeof(data));
|
||
|
|
+ fb.sputn(data, sizeof(data));
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ std::filebuf fb;
|
||
|
|
+ fb.open("test.txt", std::ios::in|std::ios::out);
|
||
|
|
+ char buf[BUFSIZ];
|
||
|
|
+ memset(buf, 0, sizeof(buf));
|
||
|
|
+ fb.sgetn(buf, sizeof(buf));
|
||
|
|
+ // Switch from reading to writing without seeking first:
|
||
|
|
+ fb.sputn("B", 1);
|
||
|
|
+ fb.pubsync();
|
||
|
|
+}
|