1 files changed, 109 insertions, 0 deletions
diff --git a/REORG.TODO/libio/iofopen.c b/REORG.TODO/libio/iofopen.c
new file mode 100644
index 0000000000..3d30dfd94a
--- /dev/null
+++ b/REORG.TODO/libio/iofopen.c
@@ -0,0 +1,109 @@
+/* Copyright (C) 1993-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.
+
+   As a special exception, if you link the code in this file with
+   files compiled with a GNU compiler to produce an executable,
+   that does not cause the resulting executable to be covered by
+   the GNU Lesser General Public License.  This exception does not
+   however invalidate any other reasons why the executable file
+   might be covered by the GNU Lesser General Public License.
+   This exception applies to code released by its copyright holders
+   in files containing the exception.  */
+
+#include "libioP.h"
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stddef.h>
+#ifdef _LIBC
+# include <shlib-compat.h>
+#else
+# define _IO_new_fopen fopen
+#endif
+
+_IO_FILE *
+__fopen_maybe_mmap (_IO_FILE *fp)
+{
+#ifdef _G_HAVE_MMAP
+  if ((fp->_flags2 & _IO_FLAGS2_MMAP) && (fp->_flags & _IO_NO_WRITES))
+    {
+      /* Since this is read-only, we might be able to mmap the contents
+	 directly.  We delay the decision until the first read attempt by
+	 giving it a jump table containing functions that choose mmap or
+	 vanilla file operations and reset the jump table accordingly.  */
+
+      if (fp->_mode <= 0)
+	_IO_JUMPS_FILE_plus (fp) = &_IO_file_jumps_maybe_mmap;
+      else
+	_IO_JUMPS_FILE_plus (fp) = &_IO_wfile_jumps_maybe_mmap;
+      fp->_wide_data->_wide_vtable = &_IO_wfile_jumps_maybe_mmap;
+    }
+#endif
+  return fp;
+}
+
+
+_IO_FILE *
+__fopen_internal (const char *filename, const char *mode, int is32)
+{
+  struct locked_FILE
+  {
+    struct _IO_FILE_plus fp;
+#ifdef _IO_MTSAFE_IO
+    _IO_lock_t lock;
+#endif
+    struct _IO_wide_data wd;
+  } *new_f = (struct locked_FILE *) malloc (sizeof (struct locked_FILE));
+
+  if (new_f == NULL)
+    return NULL;
+#ifdef _IO_MTSAFE_IO
+  new_f->fp.file._lock = &new_f->lock;
+#endif
+#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
+  _IO_no_init (&new_f->fp.file, 0, 0, &new_f->wd, &_IO_wfile_jumps);
+#else
+  _IO_no_init (&new_f->fp.file, 1, 0, NULL, NULL);
+#endif
+  _IO_JUMPS (&new_f->fp) = &_IO_file_jumps;
+  _IO_new_file_init_internal (&new_f->fp);
+#if  !_IO_UNIFIED_JUMPTABLES
+  new_f->fp.vtable = NULL;
+#endif
+  if (_IO_file_fopen ((_IO_FILE *) new_f, filename, mode, is32) != NULL)
+    return __fopen_maybe_mmap (&new_f->fp.file);
+
+  _IO_un_link (&new_f->fp);
+  free (new_f);
+  return NULL;
+}
+
+_IO_FILE *
+_IO_new_fopen (const char *filename, const char *mode)
+{
+  return __fopen_internal (filename, mode, 1);
+}
+
+#ifdef _LIBC
+strong_alias (_IO_new_fopen, __new_fopen)
+versioned_symbol (libc, _IO_new_fopen, _IO_fopen, GLIBC_2_1);
+versioned_symbol (libc, __new_fopen, fopen, GLIBC_2_1);
+
+# if !defined O_LARGEFILE || O_LARGEFILE == 0
+weak_alias (_IO_new_fopen, _IO_fopen64)
+weak_alias (_IO_new_fopen, fopen64)
+# endif
+#endif