125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/* Test of ftello() function.
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Copyright (C) 2007, 2008, 2009 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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#include <stdlib.h>
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#include "binary-io.h"
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#define ASSERT(expr) \
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do \
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{ \
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if (!(expr)) \
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{ \
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fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
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fflush (stderr); \
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abort (); \
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} \
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} \
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while (0)
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#ifndef FUNC_UNGETC_BROKEN
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# define FUNC_UNGETC_BROKEN 0
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#endif
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int
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main (int argc, char **argv)
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{
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int ch;
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/* Assume stdin is seekable iff argc > 1. */
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if (argc == 1)
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{
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ASSERT (ftell (stdin) == -1);
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ASSERT (ftello (stdin) == -1);
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return 0;
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}
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/* mingw ftell is unreliable on text mode input. */
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SET_BINARY (0);
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/* Simple tests. For each test, make sure ftell and ftello agree. */
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ASSERT (ftell (stdin) == 0);
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ASSERT (ftello (stdin) == 0);
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ch = fgetc (stdin);
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ASSERT (ch == '#');
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ASSERT (ftell (stdin) == 1);
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ASSERT (ftello (stdin) == 1);
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/* Test ftell after ungetc of read input. */
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ch = ungetc ('#', stdin);
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ASSERT (ch == '#');
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ASSERT (ftell (stdin) == 0);
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ASSERT (ftello (stdin) == 0);
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ch = fgetc (stdin);
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ASSERT (ch == '#');
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ASSERT (ftell (stdin) == 1);
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ASSERT (ftello (stdin) == 1);
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/* Test ftell after fseek. */
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ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
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ASSERT (ftell (stdin) == 2);
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ASSERT (ftello (stdin) == 2);
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/* Test ftell after random ungetc. */
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ch = fgetc (stdin);
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ASSERT (ch == '/');
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ch = ungetc ('@', stdin);
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ASSERT (ch == '@');
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ASSERT (ftell (stdin) == 2);
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ASSERT (ftello (stdin) == 2);
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ch = fgetc (stdin);
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ASSERT (ch == '@');
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ASSERT (ftell (stdin) == 3);
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ASSERT (ftello (stdin) == 3);
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if (2 < argc)
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{
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if (FUNC_UNGETC_BROKEN)
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{
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fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
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stderr);
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return 77;
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}
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/* Test ftell after ungetc without read. */
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ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
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ASSERT (ftell (stdin) == 3);
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ASSERT (ftello (stdin) == 3);
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ch = ungetc ('~', stdin);
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ASSERT (ch == '~');
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ASSERT (ftell (stdin) == 2);
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ASSERT (ftello (stdin) == 2);
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}
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#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
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/* Test ftell beyond end of file. */
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ASSERT (fseek (stdin, 0, SEEK_END) == 0);
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ch = ftello (stdin);
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ASSERT (fseek (stdin, 10, SEEK_END) == 0);
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ASSERT (ftell (stdin) == ch + 10);
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ASSERT (ftello (stdin) == ch + 10);
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#endif
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return 0;
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}
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