Initial revision

diff --git a/stdio/fflush.c b/stdio/fflush.c
new file mode 100644 (file)
index 0000000..ea195a9
--- /dev/null
+++ b/stdio/fflush.c
@@ -0,0 +1,66 @@
+/* Copyright (C) 1991 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 Library General Public License as
+published by the Free Software Foundation; either version 2 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* Flush STREAM's buffer.
+   If STREAM is NULL, flush the buffers of all streams that are writing.  */
+int
+DEFUN(fflush, (stream), register FILE *stream)
+{
+  if (stream == NULL)
+    {
+      int lossage = 0;
+      for (stream = __stdio_head; stream != NULL; stream = stream->__next)
+       if (__validfp(stream) && stream->__mode.__write)
+         lossage |= fflush(stream) == EOF;
+      return lossage ? EOF : 0;
+    }
+
+  if (!__validfp(stream))
+    {
+      errno = EINVAL;
+      return EOF;
+    }
+
+  if (stream->__mode.__write && __flshfp(stream, EOF) == EOF)
+    return EOF;
+
+  /* Kill any pushed-back input.  */
+  stream->__pushback_bufp = NULL;
+
+  if (stream->__get_limit > stream->__buffer)
+    {
+      /* Kill buffered input.  */
+
+      if (stream->__buffer == NULL)
+       /* Nothing there.  */
+       return 0;
+
+      /* Reset bufp and the get limit so __fillbf
+        will be called on the next getc.
+        The target position is still where the beginning of the buffer
+        maps to.  Since get_limit - buffer == 0, fillbuf won't move it.  */
+      stream->__bufp = stream->__get_limit = stream->__buffer;
+    }
+
+  return 0;
+}