re PR libstdc++/59427 (Opening with ios::in | ios::app does not allow appending)

2013-12-09  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/59427
	* include/bits/fstream.tcc (basic_filebuf<>::overflow,
	basic_filebuf<>::xsputn): Per lwg/596, ios_base::app implies
	ios_base:out.
	* include/std/fstream (basic_filebuf<>::_M_set_buffer): Likewise.
	* testsuite/27_io/basic_filebuf/sputc/char/59427.cc: New.
	* testsuite/27_io/basic_filebuf/sputn/char/59427.cc: Likewise.

From-SVN: r205837

2 files changed, 78 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/sputc/char/59427.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/sputc/char/59427.cc
new file mode 100644
index 0000000..9638c6c
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/sputc/char/59427.cc
@@ -0,0 +1,39 @@
+// Copyright (C) 2013 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 "" }
+
+#include <fstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/59427
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  filebuf a_f;
+  VERIFY( a_f.open("tmp_59427_sputc", ios_base::in | ios_base::app) );
+  VERIFY( 'a' == a_f.sputc('a')  );
+  VERIFY( a_f.close() );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_filebuf/sputn/char/59427.cc b/libstdc++-v3/testsuite/27_io/basic_filebuf/sputn/char/59427.cc
new file mode 100644
index 0000000..ed1ef42
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_filebuf/sputn/char/59427.cc
@@ -0,0 +1,39 @@
+// Copyright (C) 2013 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 "" }
+
+#include <fstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/59427
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  filebuf a_f;
+  VERIFY( a_f.open("tmp_59427_sputn", ios_base::in | ios_base::app) );
+  VERIFY( 5 == a_f.sputn("abcde", 5)  );
+  VERIFY( a_f.close() );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}