1 files changed, 100 insertions, 0 deletions
diff --git a/REORG.TODO/libio/iosetvbuf.c b/REORG.TODO/libio/iosetvbuf.c
new file mode 100644
index 0000000000..b242018c0b
--- /dev/null
+++ b/REORG.TODO/libio/iosetvbuf.c
@@ -0,0 +1,100 @@
+/* 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"
+
+#define _IOFBF 0 /* Fully buffered. */
+#define _IOLBF 1 /* Line buffered. */
+#define _IONBF 2 /* No buffering. */
+
+int
+_IO_setvbuf (_IO_FILE *fp, char *buf, int mode, _IO_size_t size)
+{
+  int result;
+  CHECK_FILE (fp, EOF);
+  _IO_acquire_lock (fp);
+  switch (mode)
+    {
+    case _IOFBF:
+      fp->_IO_file_flags &= ~(_IO_LINE_BUF|_IO_UNBUFFERED);
+      if (buf == NULL)
+	{
+	  if (fp->_IO_buf_base == NULL)
+	    {
+	      /* There is no flag to distinguish between "fully buffered
+		 mode has been explicitly set" as opposed to "line
+		 buffering has not been explicitly set".  In both
+		 cases, _IO_LINE_BUF is off.  If this is a tty, and
+		 _IO_filedoalloc later gets called, it cannot know if
+		 it should set the _IO_LINE_BUF flag (because that is
+		 the default), or not (because we have explicitly asked
+		 for fully buffered mode).  So we make sure a buffer
+		 gets allocated now, and explicitly turn off line
+		 buffering.
+
+		 A possibly cleaner alternative would be to add an
+		 extra flag, but then flags are a finite resource.  */
+	      if (_IO_DOALLOCATE (fp) < 0)
+		{
+		  result = EOF;
+		  goto unlock_return;
+		}
+	      fp->_IO_file_flags &= ~_IO_LINE_BUF;
+	    }
+	  result = 0;
+	  goto unlock_return;
+	}
+      break;
+    case _IOLBF:
+      fp->_IO_file_flags &= ~_IO_UNBUFFERED;
+      fp->_IO_file_flags |= _IO_LINE_BUF;
+      if (buf == NULL)
+	{
+	  result = 0;
+	  goto unlock_return;
+	}
+      break;
+    case _IONBF:
+      fp->_IO_file_flags &= ~_IO_LINE_BUF;
+      fp->_IO_file_flags |= _IO_UNBUFFERED;
+      buf = NULL;
+      size = 0;
+      break;
+    default:
+      result = EOF;
+      goto unlock_return;
+    }
+  result = _IO_SETBUF (fp, buf, size) == NULL ? EOF : 0;
+
+unlock_return:
+  _IO_release_lock (fp);
+  return result;
+}
+libc_hidden_def (_IO_setvbuf)
+
+#ifdef weak_alias
+weak_alias (_IO_setvbuf, setvbuf)
+#endif