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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Test of fseeko() function.
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Copyright (C) 2007 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include <stdio.h>
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/* Get off_t. */
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#include <sys/types.h>
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int
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main (int argc, char **argv)
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{
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/* Assume stdin is non-empty and seekable iff argc > 1. */
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int expected = argc > 1 ? 0 : -1;
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/* Exit with success only if fseek/fseeko agree. */
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int r1 = fseeko (stdin, (off_t)0, SEEK_CUR);
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int r2 = fseek (stdin, (long)0, SEEK_CUR);
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if (r1 != r2 || r1 != expected)
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return 1;
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if (argc > 1)
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{
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/* Test that fseek discards ungetc data. */
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int ch = fgetc (stdin);
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if (ch == EOF)
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return 1;
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if (ungetc (ch ^ 0xff, stdin) != (ch ^ 0xff))
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return 1;
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if (fseeko (stdin, (off_t) 0, SEEK_END))
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return 1;
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if (fgetc (stdin) != EOF)
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return 1;
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/* Test that fseek resets end-of-file marker. */
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if (!feof (stdin))
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return 1;
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if (fseeko (stdin, (off_t) 0, SEEK_END))
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return 1;
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if (feof (stdin))
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return 1;
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}
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return 0;
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}
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