diff options
Diffstat (limited to 'stdio/ungetc.c')
-rw-r--r-- | stdio/ungetc.c | 59 |
1 files changed, 0 insertions, 59 deletions
diff --git a/stdio/ungetc.c b/stdio/ungetc.c deleted file mode 100644 index 34304aa..0000000 --- a/stdio/ungetc.c +++ /dev/null @@ -1,59 +0,0 @@ -/* Copyright (C) 1991, 1993, 1996, 1997 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <stdio.h> - - -/* Push the character C back onto the input stream of STREAM. */ -int -ungetc (c, stream) - int c; - FILE *stream; -{ - if (!__validfp (stream) || !stream->__mode.__read) - { - __set_errno (EINVAL); - return EOF; - } - - if (c == EOF) - return EOF; - - if (stream->__pushed_back) - /* There is already a char pushed back. */ - return EOF; - - if ((stream->__linebuf_active || stream->__put_limit > stream->__buffer) && - /* This is a read-write stream with something in its buffer. - Flush the stream. */ - __flshfp (stream, EOF) == EOF) - return EOF; - - stream->__pushback = (unsigned char) c; - /* Tell __fillbf we've pushed back a char. */ - stream->__pushed_back = 1; - stream->__pushback_bufp = stream->__bufp; - /* Make the next getc call __fillbf. It will return C. */ - stream->__bufp = stream->__get_limit; - - /* We just gave it another character to read, so it's not at EOF. */ - stream->__eof = 0; - - return stream->__pushback; -} |