1 files changed, 55 insertions, 0 deletions
diff --git a/libc/stdio1/__ffillbuf.c b/libc/stdio1/__ffillbuf.c
new file mode 100644
index 0000000..e705cbf
--- /dev/null
+++ b/libc/stdio1/__ffillbuf.c
@@ -0,0 +1,55 @@
+/*   simplified linux __ffillbuf.c
+     Copyright (C) 1995  Joel N. Weber II
+
+     This program is free software; you can redistribute it and/or
+     modify it under the terms of the GNU General Public License
+     as published by the Free Software Foundation; either version 2
+     of the License, or (at your option) any later version.
+
+     This program 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 General Public License for more details.
+
+     You should have received a copy of the GNU General Public License
+     along with this program; if not, write to the Free Software
+     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <unistd.h>
+#include "stdio.h"
+
+/* this function makes the mistake of assuming the buffer really DOES
+need to be filled. */
+
+/* RDB:
+ *  Added simple processing for EOF and errors
+ *  As this is _only_ called from getc() the memory footprint is smaller
+ *  if it pretends to be getc in the complex case.
+ */
+
+int
+__ffillbuf(stream)
+FILE *stream;
+{
+  int stat;
+
+  if( stream->fd < 0 || ferror(stream) ) return EOF;
+
+  stat = read(stream->fd, (char *) stream->bufstart, stream->bufend - stream->bufstart);
+  if( stat > 0 )
+     stream->bufread = stream->bufstart + stat;
+  else if( stat == 0 )
+  {
+     stream->fc_eof = 1;
+     return EOF;
+  }
+  else
+  {
+     stream->fc_err = 1;
+     return EOF;
+  }
+
+  stream->bufpos = stream->bufstart;
+
+  return getc(stream);
+}