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diff --git a/include/c++/stl/stl/_ios.c b/include/c++/stl/stl/_ios.c
new file mode 100644
index 0000000..99e477b
--- /dev/null
+++ b/include/c++/stl/stl/_ios.c
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 1999
+ * Silicon Graphics Computer Systems, Inc.
+ *
+ * Copyright (c) 1999
+ * Boris Fomitchev
+ *
+ * This material is provided "as is", with absolutely no warranty expressed
+ * or implied. Any use is at your own risk.
+ *
+ * Permission to use or copy this software for any purpose is hereby granted
+ * without fee, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ *
+ */
+#ifndef _STLP_IOS_C
+#define _STLP_IOS_C
+
+#ifndef _STLP_INTERNAL_IOS_H
+# include <stl/_ios.h>
+#endif
+
+#ifndef _STLP_INTERNAL_STREAMBUF
+# include <stl/_streambuf.h>
+#endif
+
+#ifndef _STLP_INTERNAL_NUMPUNCT_H
+# include <stl/_numpunct.h>
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+// basic_ios<>'s non-inline member functions
+
+// Public constructor, taking a streambuf.
+template <class _CharT, class _Traits>
+basic_ios<_CharT, _Traits>
+  ::basic_ios(basic_streambuf<_CharT, _Traits>* __streambuf)
+    : ios_base(),
+      _M_fill(_STLP_NULL_CHAR_INIT(_CharT)), _M_streambuf(0), _M_tied_ostream(0) {
+  basic_ios<_CharT, _Traits>::init(__streambuf);
+}
+
+template <class _CharT, class _Traits>
+basic_streambuf<_CharT, _Traits>*
+basic_ios<_CharT, _Traits>::rdbuf(basic_streambuf<_CharT, _Traits>* __buf) {
+  basic_streambuf<_CharT, _Traits>* __tmp = _M_streambuf;
+  _M_streambuf = __buf;
+  this->clear();
+  return __tmp;
+}
+
+template <class _CharT, class _Traits>
+basic_ios<_CharT, _Traits>&
+basic_ios<_CharT, _Traits>::copyfmt(const basic_ios<_CharT, _Traits>& __x) {
+  _M_invoke_callbacks(erase_event);
+  _M_copy_state(__x);           // Inherited from ios_base.
+  _M_fill = __x._M_fill;
+  _M_tied_ostream = __x._M_tied_ostream;
+  _M_invoke_callbacks(copyfmt_event);
+  this->_M_set_exception_mask(__x.exceptions());
+  return *this;
+}
+
+template <class _CharT, class _Traits>
+locale basic_ios<_CharT, _Traits>::imbue(const locale& __loc) {
+  locale __tmp = ios_base::imbue(__loc);
+  _STLP_TRY {
+    if (_M_streambuf)
+      _M_streambuf->pubimbue(__loc);
+
+    // no throwing here
+    this->_M_cached_ctype = __loc._M_get_facet(ctype<char_type>::id);
+    this->_M_cached_numpunct = __loc._M_get_facet(numpunct<char_type>::id);
+    this->_M_cached_grouping = ((numpunct<char_type>*)_M_cached_numpunct)->grouping();
+  }
+  _STLP_CATCH_ALL {
+    __tmp = ios_base::imbue(__tmp);
+    _M_handle_exception(ios_base::failbit);
+  }
+  return __tmp;
+}
+
+// Protected constructor and initialization functions. The default
+// constructor creates an uninitialized basic_ios, and init() initializes
+// all of the members to the values in Table 89 of the C++ standard.
+
+template <class _CharT, class _Traits>
+basic_ios<_CharT, _Traits>::basic_ios()
+  : ios_base(),
+    _M_fill(_STLP_NULL_CHAR_INIT(_CharT)), _M_streambuf(0), _M_tied_ostream(0)
+{}
+
+template <class _CharT, class _Traits>
+void
+basic_ios<_CharT, _Traits>::init(basic_streambuf<_CharT, _Traits>* __sb)
+{
+  this->rdbuf(__sb);
+  this->imbue(locale());
+  this->tie(0);
+  this->_M_set_exception_mask(ios_base::goodbit);
+  this->_M_clear_nothrow(__sb != 0 ? ios_base::goodbit : ios_base::badbit);
+  ios_base::flags(ios_base::skipws | ios_base::dec);
+  ios_base::width(0);
+  ios_base::precision(6);
+  this->fill(widen(' '));
+  // We don't need to worry about any of the three arrays: they are
+  // initialized correctly in ios_base's constructor.
+}
+
+// This is never called except from within a catch clause.
+template <class _CharT, class _Traits>
+void basic_ios<_CharT, _Traits>::_M_handle_exception(ios_base::iostate __flag)
+{
+  this->_M_setstate_nothrow(__flag);
+  if (this->_M_get_exception_mask() & __flag)
+    _STLP_RETHROW;
+}
+
+_STLP_END_NAMESPACE
+
+#endif /* _STLP_IOS_C */
+
+// Local Variables:
+// mode:C++
+// End: