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/* Copyright (C) 1991-2023 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, see
<https://www.gnu.org/licenses/>. */
#include <stdio.h>
#define TESTFILE OBJPFX "test.dat"
static int
do_test (void)
{
FILE *fp;
int i, j;
puts ("\nFile seek test");
fp = fopen (TESTFILE, "w");
if (fp == NULL)
{
perror (TESTFILE);
return 1;
}
for (i = 0; i < 256; i++)
putc (i, fp);
if (freopen (TESTFILE, "r", fp) != fp)
{
perror ("Cannot open file for reading");
return 1;
}
for (i = 1; i <= 255; i++)
{
printf ("%3d\n", i);
fseek (fp, (long) -i, SEEK_END);
if ((j = getc (fp)) != 256 - i)
{
printf ("SEEK_END failed %d\n", j);
break;
}
if (fseek (fp, (long) i, SEEK_SET))
{
puts ("Cannot SEEK_SET");
break;
}
if ((j = getc (fp)) != i)
{
printf ("SEEK_SET failed %d\n", j);
break;
}
if (fseek (fp, (long) i, SEEK_SET))
{
puts ("Cannot SEEK_SET");
break;
}
if (fseek (fp, (long) (i >= 128 ? -128 : 128), SEEK_CUR))
{
puts ("Cannot SEEK_CUR");
break;
}
if ((j = getc (fp)) != (i >= 128 ? i - 128 : i + 128))
{
printf ("SEEK_CUR failed %d\n", j);
break;
}
}
fclose (fp);
remove (TESTFILE);
puts ((i > 255) ? "Test succeeded." : "Test FAILED!");
return (i > 255) ? 0 : 1;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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