obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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4 files changed, 284 insertions, 0 deletions

diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/1.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/1.cc
new file mode 100644
index 000000000..142cde9c7
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/1.cc
@@ -0,0 +1,110 @@
+// 981208 bkoz test functionality of basic_stringbuf for char_type == char
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2009, 2010
+// 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/>.
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+std::string str_01("mykonos. . . or what?");
+std::stringbuf strb_01(str_01);
+
+// test overloaded virtual functions
+void test04() 
+{
+  bool test __attribute__((unused)) = true;
+  std::string 		str_tmp;
+  std::streamsize 		strmsz_1, strmsz_2;
+  typedef std::stringbuf::int_type int_type;
+  typedef std::stringbuf::traits_type traits_type;
+  typedef std::stringbuf::pos_type pos_type;
+  typedef std::stringbuf::off_type off_type;
+
+  int_type c1 = strb_01.sbumpc();
+  int_type c2;
+
+  // BUFFER MANAGEMENT & POSITIONING
+
+  // seekoff
+  // pubseekoff(off_type off, ios_base::seekdir way, ios_base::openmode which)
+  // alters the stream position to off
+  pos_type pt_1(off_type(-1));
+  pos_type pt_2(off_type(0));
+  off_type off_1 = 0;
+  off_type off_2 = 0;
+  strb_01.str(str_01); //in|out ("mykonos. . . or what?");
+
+  //IN|OUT
+  //beg
+  pt_1 = strb_01.pubseekoff(2, std::ios_base::beg);
+  off_1 = off_type(pt_1);
+  VERIFY( off_1 >= 0 );
+  c1 = strb_01.snextc(); //current in pointer +1
+  VERIFY( c1 == 'o' );
+  c2 = strb_01.sputc('x');  //test current out pointer
+  str_tmp = std::string("myxonos. . . or what?");
+  VERIFY( strb_01.str() == str_tmp );
+  //cur
+  pt_1 = strb_01.pubseekoff(2, std::ios_base::cur);
+  off_1 = off_type(pt_1);
+  VERIFY( off_1 == -1 ); // can't seekoff for in and out + cur in sstreams
+  pt_1 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
+  off_1 = off_type(pt_1);
+  pt_2 = strb_01.pubseekoff(2, std::ios_base::cur, std::ios_base::in);
+  off_2 = off_type(pt_2);
+  VERIFY( off_2 == off_1 + 2 );
+  c1 = strb_01.snextc(); //current in pointer + 1
+  VERIFY( c1 == ' ' );
+  c2 = strb_01.sputc('x');  //test current out pointer
+  str_tmp = std::string("myxxnos. . . or what?");
+  VERIFY( strb_01.str() == str_tmp );
+  //end
+  pt_2 = strb_01.pubseekoff(2, std::ios_base::end);
+  off_1 = off_type(pt_2);
+  VERIFY( off_1 == -1 ); // not a valid position
+  VERIFY( strb_01.str() == str_tmp );
+  // end part two (from the filebuf tests)
+  strb_01.pubseekoff(0, std::ios_base::end);
+  strmsz_1 = strb_01.in_avail(); // 0 cuz at the end
+  c1 = strb_01.sgetc(); 
+  c2 = strb_01.sungetc();
+  strmsz_2 = strb_01.in_avail(); // 1
+  strb_01.sgetc();
+  VERIFY( c1 != c2 );
+  VERIFY( strmsz_2 != strmsz_1 );
+  VERIFY( strmsz_2 == 1 );
+  // end part three
+  strmsz_1 = strb_01.str().size();
+  strmsz_2 = strb_01.sputn(" ravi shankar meets carlos santana in LoHa", 90);
+  strb_01.pubseekoff(0, std::ios_base::end);
+  strb_01.sputc('<');
+  str_tmp = strb_01.str();
+  VERIFY(static_cast<std::streamsize>(str_tmp.size()) == strmsz_1 + strmsz_2 + 1);
+  // IN
+  // OUT
+}
+
+int main()
+{
+  test04();
+  return 0;
+}
+
+
+
+// more candy!!!
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/10975.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/10975.cc
new file mode 100644
index 000000000..9638f788c
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/10975.cc
@@ -0,0 +1,56 @@
+// 2004-09-30  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 2009 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/>.
+
+// 27.7.1.3 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/10975
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+  typedef streambuf::pos_type pos_type;
+  typedef streambuf::off_type off_type;
+
+  const pos_type good = pos_type(off_type(0));
+  const pos_type bad = pos_type(off_type(-1));
+  pos_type p;
+
+  stringbuf sbuf;
+  
+  p = sbuf.pubseekoff(0, ios_base::cur, ios_base::in);
+  VERIFY( p == good );
+
+  p = sbuf.pubseekoff(0, ios_base::beg, ios_base::out);
+  VERIFY( p == good );
+
+  p = sbuf.pubseekoff(0, ios_base::end);
+  VERIFY( p == good );
+
+  p = sbuf.pubseekoff(0, ios_base::cur);
+  VERIFY( p == bad );
+}
+
+int main() 
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/16956.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/16956.cc
new file mode 100644
index 000000000..724a12d2d
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/16956.cc
@@ -0,0 +1,60 @@
+// 2004-08-12  Paolo Carlini  <pcarlini@suse.de>
+
+// Copyright (C) 2004, 2009 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/>.
+
+// 27.7.1.3 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+// libstdc++/16956
+void test01()
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+
+  typedef stringbuf::int_type int_type;
+  typedef stringbuf::traits_type traits_type;
+  typedef stringbuf::pos_type pos_type;
+  typedef stringbuf::off_type off_type;
+
+  stringbuf strb_01("lara's place", ios_base::in);
+  pos_type pt_1 = strb_01.pubseekoff(5, ios_base::cur, ios_base::in);
+  int_type c1 = strb_01.sgetc();
+  VERIFY( c1 != traits_type::eof() );
+  pos_type pt_2 = strb_01.pubseekoff(2, ios_base::cur, ios_base::in);
+  pos_type pt_3 = strb_01.pubseekpos(pt_1, ios_base::in);
+  int_type c2 = strb_01.sbumpc();
+  VERIFY( off_type(pt_3) == off_type(pt_2) - 2 );
+  VERIFY( c2 == c1 );
+
+  stringbuf strb_02("-", ios_base::out);
+  pos_type pt_4 = strb_02.pubseekoff(0, ios_base::cur, ios_base::out);
+  strb_02.sputn("red", 3);
+  pos_type pt_5 = strb_02.pubseekoff(-3, ios_base::cur, ios_base::out);
+  strb_02.pubseekpos(pt_5, ios_base::out);
+  VERIFY( off_type(pt_5) == off_type(pt_4) );
+  strb_02.sputn("blu", 3);
+  VERIFY( strb_02.str() == "blu" );
+}
+
+int main()
+{
+  test01();
+  return 0;
+}
diff --git a/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/2.cc b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/2.cc
new file mode 100644
index 000000000..a1d05d72a
--- /dev/null
+++ b/libstdc++-v3/testsuite/27_io/basic_stringbuf/seekoff/char/2.cc
@@ -0,0 +1,58 @@
+// 2001-05-21 Benjamin Kosnik  <bkoz@redhat.com>
+
+// Copyright (C) 2001, 2002, 2003, 2009 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/>.
+
+// 27.7.1.3 Overridden virtual functions
+
+#include <sstream>
+#include <testsuite_hooks.h>
+
+void test02(std::stringbuf& in, bool pass)
+{
+  bool test __attribute__((unused)) = true;
+  using namespace std;
+  typedef streambuf::pos_type pos_type;
+  typedef streambuf::off_type off_type;
+  pos_type bad = pos_type(off_type(-1));
+  pos_type p = 0;
+
+  // seekoff
+  p = in.pubseekoff(0, ios_base::beg, ios_base::in);
+  if (pass)
+    VERIFY( p != bad );
+
+  p = in.pubseekoff(0, ios_base::beg, ios_base::out); 
+  VERIFY( p == bad );
+
+  p = in.pubseekoff(0, ios_base::beg); 
+  VERIFY( p == bad );
+}
+
+int main() 
+{
+  using namespace std;
+
+  // movie star, submarine scientist!
+  stringbuf in1("Hedy Lamarr", ios_base::in);
+  stringbuf in2(ios_base::in);
+  stringbuf in3("", ios_base::in);
+  test02(in1, true);
+  test02(in2, false);
+  test02(in3, false);
+  return 0;
+}