view lib/freadseek.h @ 15428:4e3a37b1ceae

ffsl, ffsll: new modules * modules/ffsl: New file. * modules/ffsll: Likewise. * m4/ffsl.m4: Likewise. * m4/ffsll.m4: Likewise. * lib/ffsl.c: Likewise. * lib/ffsl.h: Likewise. * lib/ffsll.c: Likewise. * m4/string_h.m4 (gl_HEADER_STRING_H_BODY) (gl_HEADER_STRING_H_DEFAULTS): Add defaults. * modules/string (Makefile.am): Substitute witnesses. * lib/strings.in.h (ffsl, ffsll): Declare. * modules/ffsl-tests: New test file. * modules/ffsll-tests: Likewise. * tests/test-ffsl.c: Likewise. * tests/test-ffsll.c: Likewise. * MODULES.html.sh (Integer arithmetic functions): Mention it. * doc/glibc-functions/ffsl.texi (ffsl): Likewise. * doc/glibc-functions/ffsll.texi (ffsll): Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Fri, 15 Jul 2011 15:08:34 -0600
parents 97fc9a21a8fb
children 8250f2777afc
line wrap: on
line source

/* Skipping input from a FILE stream.
   Copyright (C) 2007-2011 Free Software Foundation, Inc.

   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 3 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, see <http://www.gnu.org/licenses/>.  */

#include <stddef.h>
#include <stdio.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Assuming the stream STREAM is open for reading:

   Read and discard OFFSET bytes from STREAM.

   freadseek (STREAM, OFFSET) is the same as
   fseek (STREAM, OFFSET, SEEK_CUR), except that the latter does not work
   on non-seekable input streams (such as pipes).

   Upon success, return 0.
   Upon premature end of stream, return 0 (like fseek does).
   Upon error, set the error indicator in the stream and return EOF.

   STREAM must not be wide-character oriented.  */

extern int freadseek (FILE *stream, size_t offset);

#ifdef __cplusplus
}
#endif