Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

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