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/* Test of fseeko() function.
Copyright (C) 2007 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/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
#include <config.h>
#include <stdio.h>
/* Get off_t. */
#include <sys/types.h>
int
main (int argc, char **argv)
{
/* Assume stdin is non-empty and seekable iff argc > 1. */
int expected = argc > 1 ? 0 : -1;
/* Exit with success only if fseek/fseeko agree. */
int r1 = fseeko (stdin, (off_t)0, SEEK_CUR);
int r2 = fseek (stdin, (long)0, SEEK_CUR);
if (r1 != r2 || r1 != expected)
return 1;
if (argc > 1)
{
/* Test that fseek discards ungetc data. */
int ch = fgetc (stdin);
if (ch == EOF)
return 1;
if (ungetc (ch ^ 0xff, stdin) != (ch ^ 0xff))
return 1;
if (fseeko (stdin, (off_t) 0, SEEK_END))
return 1;
if (fgetc (stdin) != EOF)
return 1;
/* Test that fseek resets end-of-file marker. */
if (!feof (stdin))
return 1;
if (fseeko (stdin, (off_t) 0, SEEK_END))
return 1;
if (feof (stdin))
return 1;
}
return 0;
}
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