2010-11-18 Paolo Carlini <paolo.carlini@oracle.com>

	PR libstdc++/26211 + N3168
	* include/bits/istream.tcc (basic_istream<>::tellg, seekg(pos_type),
	seekg(off_type, ios_base::seekdir)): Construct a sentry.
	(basic_istream<>::tellg, seekg(pos_type), seekg(off_type,
	ios_base::seekdir, putback, unget)): Clear eofbit first, per N3168.  
	* testsuite/27_io/basic_istream/seekg/char/26211.cc: New.
	* testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc: Likewise.
	* testsuite/27_io/basic_istream/tellg/char/26211.cc: Likewise.
	* testsuite/27_io/basic_istream/tellg/wchar_t/26211.cc: Likewise.
	* testsuite/27_io/basic_istream/tellg/char/8348.cc: Tweak.
	* testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc: Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@166911 138bc75d-0d04-0410-961f-82ee72b054a4

8 files changed, 309 insertions, 49 deletions

diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 3d5dc454876..49d7d474417 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,17 @@
+2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR libstdc++/26211 + N3168
+	* include/bits/istream.tcc (basic_istream<>::tellg, seekg(pos_type),
+	seekg(off_type, ios_base::seekdir)): Construct a sentry.
+	(basic_istream<>::tellg, seekg(pos_type), seekg(off_type,
+	ios_base::seekdir, putback, unget)): Clear eofbit first, per N3168.
+	* testsuite/27_io/basic_istream/seekg/char/26211.cc: New.
+	* testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc: Likewise.
+	* testsuite/27_io/basic_istream/tellg/char/26211.cc: Likewise.
+	* testsuite/27_io/basic_istream/tellg/wchar_t/26211.cc: Likewise.
+	* testsuite/27_io/basic_istream/tellg/char/8348.cc: Tweak.
+	* testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc: Likewise.
+
 2010-11-18  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR other/42670
diff --git a/libstdc++-v3/include/bits/istream.tcc b/libstdc++-v3/include/bits/istream.tcc
index d005f736f03..e0a4cd3a094 100644
--- a/libstdc++-v3/include/bits/istream.tcc
+++ b/libstdc++-v3/include/bits/istream.tcc
@@ -1,7 +1,7 @@
 // istream classes -*- C++ -*-
 
 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
-// 2006, 2007, 2008, 2009
+// 2006, 2007, 2008, 2009, 2010
 // Free Software Foundation, Inc.
 //
 // This file is part of the GNU ISO C++ Library.  This library is free
@@ -713,6 +713,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       // _GLIBCXX_RESOLVE_LIB_DEFECTS
       // 60. What is a formatted input function?
       _M_gcount = 0;
+      // Clear eofbit per N3168.
+      this->clear(this->rdstate() & ~ios_base::eofbit);
       sentry __cerb(*this, true);
       if (__cerb)
 	{
@@ -746,6 +748,8 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       // _GLIBCXX_RESOLVE_LIB_DEFECTS
       // 60. What is a formatted input function?
       _M_gcount = 0;
+      // Clear eofbit per N3168.
+      this->clear(this->rdstate() & ~ios_base::eofbit);
       sentry __cerb(*this, true);
       if (__cerb)
 	{
@@ -815,19 +819,23 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
       // _GLIBCXX_RESOLVE_LIB_DEFECTS
       // DR60.  Do not change _M_gcount.
       pos_type __ret = pos_type(-1);
-      __try
-	{
-	  if (!this->fail())
-	    __ret = this->rdbuf()->pubseekoff(0, ios_base::cur,
-					      ios_base::in);
-	}
-      __catch(__cxxabiv1::__forced_unwind&)
+      sentry __cerb(*this, true);
+      if (__cerb)
 	{
-	  this->_M_setstate(ios_base::badbit);
-	  __throw_exception_again;
+	  __try
+	    {
+	      if (!this->fail())
+		__ret = this->rdbuf()->pubseekoff(0, ios_base::cur,
+						  ios_base::in);
+	    }
+	  __catch(__cxxabiv1::__forced_unwind&)
+	    {
+	      this->_M_setstate(ios_base::badbit);
+	      __throw_exception_again;
+	    }
+	  __catch(...)
+	    { this->_M_setstate(ios_base::badbit); }
 	}
-      __catch(...)
-	{ this->_M_setstate(ios_base::badbit); }
       return __ret;
     }
 
@@ -838,29 +846,35 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
     {
       // _GLIBCXX_RESOLVE_LIB_DEFECTS
       // DR60.  Do not change _M_gcount.
-      ios_base::iostate __err = ios_base::goodbit;
-      __try
+      // Clear eofbit per N3168.
+      this->clear(this->rdstate() & ~ios_base::eofbit);
+      sentry __cerb(*this, true);
+      if (__cerb)
 	{
-	  if (!this->fail())
+	  ios_base::iostate __err = ios_base::goodbit;
+	  __try
 	    {
-	      // 136.  seekp, seekg setting wrong streams?
-	      const pos_type __p = this->rdbuf()->pubseekpos(__pos,
-							     ios_base::in);
-	      
-	      // 129.  Need error indication from seekp() and seekg()
-	      if (__p == pos_type(off_type(-1)))
-		__err |= ios_base::failbit;
+	      if (!this->fail())
+		{
+		  // 136.  seekp, seekg setting wrong streams?
+		  const pos_type __p = this->rdbuf()->pubseekpos(__pos,
+								 ios_base::in);
+		  
+		  // 129.  Need error indication from seekp() and seekg()
+		  if (__p == pos_type(off_type(-1)))
+		    __err |= ios_base::failbit;
+		}
 	    }
+	  __catch(__cxxabiv1::__forced_unwind&)
+	    {
+	      this->_M_setstate(ios_base::badbit);
+	      __throw_exception_again;
+	    }
+	  __catch(...)
+	    { this->_M_setstate(ios_base::badbit); }
+	  if (__err)
+	    this->setstate(__err);
 	}
-      __catch(__cxxabiv1::__forced_unwind&)
-	{
-	  this->_M_setstate(ios_base::badbit);
-	  __throw_exception_again;
-	}
-      __catch(...)
-	{ this->_M_setstate(ios_base::badbit); }
-      if (__err)
-	this->setstate(__err);
       return *this;
     }
 
@@ -871,29 +885,35 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
     {
       // _GLIBCXX_RESOLVE_LIB_DEFECTS
       // DR60.  Do not change _M_gcount.
-      ios_base::iostate __err = ios_base::goodbit;
-      __try
+      // Clear eofbit per N3168.
+      this->clear(this->rdstate() & ~ios_base::eofbit);
+      sentry __cerb(*this, true);
+      if (__cerb)
 	{
-	  if (!this->fail())
+	  ios_base::iostate __err = ios_base::goodbit;
+	  __try
 	    {
-	      // 136.  seekp, seekg setting wrong streams?
-	      const pos_type __p = this->rdbuf()->pubseekoff(__off, __dir,
-							     ios_base::in);
+	      if (!this->fail())
+		{
+		  // 136.  seekp, seekg setting wrong streams?
+		  const pos_type __p = this->rdbuf()->pubseekoff(__off, __dir,
+								 ios_base::in);
 	      
-	      // 129.  Need error indication from seekp() and seekg()
-	      if (__p == pos_type(off_type(-1)))
-		__err |= ios_base::failbit;
+		  // 129.  Need error indication from seekp() and seekg()
+		  if (__p == pos_type(off_type(-1)))
+		    __err |= ios_base::failbit;
+		}
 	    }
+	  __catch(__cxxabiv1::__forced_unwind&)
+	    {
+	      this->_M_setstate(ios_base::badbit);
+	      __throw_exception_again;
+	    }
+	  __catch(...)
+	    { this->_M_setstate(ios_base::badbit); }
+	  if (__err)
+	    this->setstate(__err);
 	}
-      __catch(__cxxabiv1::__forced_unwind&)
-	{
-	  this->_M_setstate(ios_base::badbit);
-	  __throw_exception_again;
-	}
-      __catch(...)
-	{ this->_M_setstate(ios_base::badbit); }
-      if (__err)
-	this->setstate(__err);
       return *this;
     }
 
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/seekg/char/26211.cc b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/char/26211.cc
new file mode 100644
index 00000000000..be2865078c0
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/char/26211.cc
@@ -0,0 +1,63 @@
+// 2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+#include <istream>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/26211
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef istringstream::pos_type pos_type;
+
+  istringstream iss("Duos for Doris");
+  ostringstream oss;
+
+  const pos_type p0 = iss.tellg();
+  VERIFY( p0 == pos_type(0) );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+
+  iss.seekg(0, ios_base::beg);
+  VERIFY( iss.good() );
+
+  iss.seekg(0, ios_base::beg);
+  VERIFY( !iss.fail() );
+  VERIFY( iss.tellg() == p0 );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+
+  iss.seekg(p0);
+  VERIFY( iss.good() );
+
+  iss.seekg(p0);
+  VERIFY( !iss.fail() );
+  VERIFY( iss.tellg() == p0 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc
new file mode 100644
index 00000000000..2a73e1ec7ac
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/seekg/wchar_t/26211.cc
@@ -0,0 +1,63 @@
+// 2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+#include <istream>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/26211
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef wistringstream::pos_type pos_type;
+
+  wistringstream iss(L"Duos for Doris");
+  wostringstream oss;
+
+  const pos_type p0 = iss.tellg();
+  VERIFY( p0 == pos_type(0) );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+
+  iss.seekg(0, ios_base::beg);
+  VERIFY( iss.good() );
+
+  iss.seekg(0, ios_base::beg);
+  VERIFY( !iss.fail() );
+  VERIFY( iss.tellg() == p0 );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+
+  iss.seekg(p0);
+  VERIFY( iss.good() );
+
+  iss.seekg(p0);
+  VERIFY( !iss.fail() );
+  VERIFY( iss.tellg() == p0 );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/26211.cc b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/26211.cc
new file mode 100644
index 00000000000..6677f941048
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/26211.cc
@@ -0,0 +1,49 @@
+// 2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+#include <istream>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/26211
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef istringstream::pos_type pos_type;
+
+  istringstream iss("Duos for Doris");
+  ostringstream oss;
+
+  VERIFY( iss.tellg() == pos_type(0) );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+  VERIFY( iss.tellg() == pos_type(-1) );
+
+  iss.clear();
+  VERIFY( iss.tellg() == pos_type(14) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/8348.cc b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/8348.cc
index e4b4914ef48..62bdd502597 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/8348.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/char/8348.cc
@@ -40,6 +40,7 @@ void test06(void)
     iss >> asNum;
     VERIFY( test = iss.eof() );
     VERIFY( test = !iss.fail() );
+    iss.clear();
     iss.tellg();
     VERIFY( test = !iss.fail() );
   }
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/26211.cc b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/26211.cc
new file mode 100644
index 00000000000..7d88d5c1f0f
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/26211.cc
@@ -0,0 +1,49 @@
+// 2010-11-18  Paolo Carlini  <paolo.carlini@oracle.com>
+
+// Copyright (C) 2010 Free Software Foundation
+//
+// 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/>.
+
+#include <istream>
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/26211
+void test01()
+{
+  using namespace std;
+  bool test __attribute__((unused)) = true;
+
+  typedef wistringstream::pos_type pos_type;
+
+  wistringstream iss(L"Duos for Doris");
+  wostringstream oss;
+
+  VERIFY( iss.tellg() == pos_type(0) );
+
+  iss >> oss.rdbuf();
+  VERIFY( iss.rdstate() == iss.eofbit );
+  VERIFY( iss.tellg() == pos_type(-1) );
+
+  iss.clear();
+  VERIFY( iss.tellg() == pos_type(14) );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc
index 61613817b4d..6979b9c06f8 100644
--- a/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc
+++ b/libstdc++-v3/testsuite/27_io/basic_istream/tellg/wchar_t/8348.cc
@@ -37,6 +37,7 @@ void test06(void)
     iss >> asNum;
     VERIFY( test = iss.eof() );
     VERIFY( test = !iss.fail() );
+    iss.clear();
     iss.tellg();
     VERIFY( test = !iss.fail() );
   }