1 /* Test of ftell() function.
2 Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
23 #include "signature.h"
24 SIGNATURE_CHECK (ftell, long, (FILE *));
26 #include "binary-io.h"
29 /* None of the files accessed by this test are large, so disable the
30 fseek link warning if we are not using the gnulib fseek module. */
35 #ifndef FUNC_UNGETC_BROKEN
36 # define FUNC_UNGETC_BROKEN 0
40 main (int argc, char **argv)
43 /* Assume stdin is seekable iff argc > 1. */
46 ASSERT (ftell (stdin) == -1);
50 /* mingw ftell is unreliable on text mode input. */
54 ASSERT (ftell (stdin) == 0);
58 ASSERT (ftell (stdin) == 1);
60 /* Test ftell after ungetc of read input. */
61 ch = ungetc ('#', stdin);
63 ASSERT (ftell (stdin) == 0);
67 ASSERT (ftell (stdin) == 1);
69 /* Test ftell after fseek. */
70 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
71 ASSERT (ftell (stdin) == 2);
73 /* Test ftell after random ungetc. */
76 ch = ungetc ('@', stdin);
78 ASSERT (ftell (stdin) == 2);
82 ASSERT (ftell (stdin) == 3);
86 if (FUNC_UNGETC_BROKEN)
88 fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
92 /* Test ftell after ungetc without read. */
93 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
94 ASSERT (ftell (stdin) == 3);
96 ch = ungetc ('~', stdin);
98 ASSERT (ftell (stdin) == 2);
101 #if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
102 /* Test ftell beyond end of file. */
103 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
105 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
106 ASSERT (ftell (stdin) == ch + 10);