diff -r 000000000000 -r 6474c204b198 build/stlport/src/fstream.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/build/stlport/src/fstream.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,114 @@
+/*
+ * 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.
+ *
+ */
+
+#include "stlport_prefix.h"
+
+#ifdef _STLP_USE_UNIX_IO
+# include "details/fstream_unistd.cpp"
+#elif defined(_STLP_USE_STDIO_IO)
+# include "details/fstream_stdio.cpp"
+#elif defined(_STLP_USE_WIN32_IO)
+# include "details/fstream_win32io.cpp"
+#else
+#  error "Can't recognize IO scheme to use"
+#endif
+
+_STLP_BEGIN_NAMESPACE
+
+// fbp : let us map 1 MB maximum, just be sure not to trash VM
+#define MMAP_CHUNK 0x100000L
+
+_Underflow< char, char_traits<char> >::int_type _STLP_CALL
+_Underflow< char, char_traits<char> >::_M_doit(basic_filebuf<char, char_traits<char> >* __this)
+{
+  typedef char_traits<char> traits_type;
+  typedef traits_type::int_type int_type;
+
+  if (!__this->_M_in_input_mode) {
+    if (!__this->_M_switch_to_input_mode())
+      return traits_type::eof();
+  }
+  else if (__this->_M_in_putback_mode) {
+    __this->_M_exit_putback_mode();
+    if (__this->gptr() != __this->egptr()) {
+      int_type __c = traits_type::to_int_type(*__this->gptr());
+      return __c;
+    }
+  }
+
+  // If it's a disk file, and if the internal and external character
+  // sequences are guaranteed to be identical, then try to use memory
+  // mapped I/O.  Otherwise, revert to ordinary read.
+  if (__this->_M_base.__regular_file()
+      && __this->_M_always_noconv
+      && __this->_M_base._M_in_binary_mode()) {
+    // If we've mmapped part of the file already, then unmap it.
+    if (__this->_M_mmap_base)
+      __this->_M_base._M_unmap(__this->_M_mmap_base, __this->_M_mmap_len);
+
+    // Determine the position where we start mapping.  It has to be
+    // a multiple of the page size.
+    streamoff __cur = __this->_M_base._M_seek(0, ios_base::cur);
+    streamoff __size = __this->_M_base._M_file_size();
+    if (__size > 0 && __cur >= 0 && __cur < __size) {
+      streamoff __offset = (__cur / __this->_M_base.__page_size()) * __this->_M_base.__page_size();
+      streamoff __remainder = __cur - __offset;
+
+      __this->_M_mmap_len = __size - __offset;
+
+      if (__this->_M_mmap_len > MMAP_CHUNK)
+        __this->_M_mmap_len = MMAP_CHUNK;
+
+      if ((__this->_M_mmap_base = __this->_M_base._M_mmap(__offset, __this->_M_mmap_len)) != 0) {
+        __this->setg(__STATIC_CAST(char*, __this->_M_mmap_base),
+                     __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __remainder),
+                     __STATIC_CAST(char*, __this->_M_mmap_base) + __STATIC_CAST(ptrdiff_t, __this->_M_mmap_len));
+        return traits_type::to_int_type(*__this->gptr());
+      }
+      else
+        __this->_M_mmap_len = 0;
+    }
+    else {
+      __this->_M_mmap_base = 0;
+      __this->_M_mmap_len = 0;
+    }
+  }
+
+  return __this->_M_underflow_aux();
+}
+
+//----------------------------------------------------------------------
+// Force instantiation of filebuf and fstream classes.
+#if !defined(_STLP_NO_FORCE_INSTANTIATE)
+
+template class basic_filebuf<char, char_traits<char> >;
+template class basic_ifstream<char, char_traits<char> >;
+template class basic_ofstream<char, char_traits<char> >;
+template class basic_fstream<char, char_traits<char> >;
+
+#  if !defined (_STLP_NO_WCHAR_T)
+template class _Underflow<wchar_t, char_traits<wchar_t> >;
+template class basic_filebuf<wchar_t, char_traits<wchar_t> >;
+template class basic_ifstream<wchar_t, char_traits<wchar_t> >;
+template class basic_ofstream<wchar_t, char_traits<wchar_t> >;
+template class basic_fstream<wchar_t, char_traits<wchar_t> >;
+#  endif /* _STLP_NO_WCHAR_T */
+
+#endif
+
+_STLP_END_NAMESPACE