88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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/* Copyright (C) 1991-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#define TESTFILE OBJPFX "test.dat"
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static int
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do_test (void)
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{
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FILE *fp;
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int i, j;
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puts ("\nFile seek test");
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fp = fopen (TESTFILE, "w");
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if (fp == NULL)
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{
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perror (TESTFILE);
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return 1;
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}
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for (i = 0; i < 256; i++)
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putc (i, fp);
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if (freopen (TESTFILE, "r", fp) != fp)
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{
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perror ("Cannot open file for reading");
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return 1;
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}
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for (i = 1; i <= 255; i++)
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{
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printf ("%3d\n", i);
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fseek (fp, (long) -i, SEEK_END);
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if ((j = getc (fp)) != 256 - i)
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{
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printf ("SEEK_END failed %d\n", j);
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break;
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}
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if (fseek (fp, (long) i, SEEK_SET))
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{
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puts ("Cannot SEEK_SET");
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break;
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}
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if ((j = getc (fp)) != i)
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{
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printf ("SEEK_SET failed %d\n", j);
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break;
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}
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if (fseek (fp, (long) i, SEEK_SET))
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{
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puts ("Cannot SEEK_SET");
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break;
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}
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if (fseek (fp, (long) (i >= 128 ? -128 : 128), SEEK_CUR))
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{
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puts ("Cannot SEEK_CUR");
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break;
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}
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if ((j = getc (fp)) != (i >= 128 ? i - 128 : i + 128))
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{
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printf ("SEEK_CUR failed %d\n", j);
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break;
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}
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}
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fclose (fp);
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remove (TESTFILE);
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puts ((i > 255) ? "Test succeeded." : "Test FAILED!");
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return (i > 255) ? 0 : 1;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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