From b1ddaa81f28b8bbc62d6d50526e0935b173099eb Mon Sep 17 00:00:00 2001 From: Patryk Niedźwiedziński Date: Sat, 17 Apr 2021 10:28:11 +0200 Subject: Init --- stdio/rewind.c | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 stdio/rewind.c (limited to 'stdio/rewind.c') diff --git a/stdio/rewind.c b/stdio/rewind.c new file mode 100644 index 0000000..03aa3f5 --- /dev/null +++ b/stdio/rewind.c @@ -0,0 +1,31 @@ +/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│ +│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│ +╞══════════════════════════════════════════════════════════════════════════════╡ +│ Copyright 2020 Justine Alexandra Roberts Tunney │ +│ │ +│ Permission to use, copy, modify, and/or distribute this software for │ +│ any purpose with or without fee is hereby granted, provided that the │ +│ above copyright notice and this permission notice appear in all copies. │ +│ │ +│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │ +│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │ +│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │ +│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │ +│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │ +│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │ +│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │ +│ PERFORMANCE OF THIS SOFTWARE. │ +╚─────────────────────────────────────────────────────────────────────────────*/ +#include "libc/calls/calls.h" +#include "libc/stdio/stdio.h" + +/** + * Moves standard i/o stream to beginning of file. + * + * Like fseek(), this function can be used to restore a stream from the + * EOF state, without reopening it. + */ +void rewind(FILE *f) { + fseek(f, 0, SEEK_SET); + f->state = 0; +} -- cgit 1.4.1