diff options
Diffstat (limited to 'libc/stdio1/__ffillbuf.c')
-rw-r--r-- | libc/stdio1/__ffillbuf.c | 55 |
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); +} |