1 /* Test of ftello() function.
2 Copyright (C) 2007, 2008 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. */
24 #include "binary-io.h"
26 #define ASSERT(expr) \
31 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
38 main (int argc, char **argv)
41 /* Assume stdin is seekable iff argc > 1. */
44 ASSERT (ftell (stdin) == -1);
45 ASSERT (ftello (stdin) == -1);
49 /* mingw ftell is unreliable on text mode input. */
52 /* Simple tests. For each test, make sure ftell and ftello agree. */
53 ASSERT (ftell (stdin) == 0);
54 ASSERT (ftello (stdin) == 0);
58 ASSERT (ftell (stdin) == 1);
59 ASSERT (ftello (stdin) == 1);
61 /* Test ftell after ungetc of read input. */
62 ch = ungetc ('#', stdin);
64 ASSERT (ftell (stdin) == 0);
65 ASSERT (ftello (stdin) == 0);
69 ASSERT (ftell (stdin) == 1);
70 ASSERT (ftello (stdin) == 1);
72 /* Test ftell after fseek. */
73 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
74 ASSERT (ftell (stdin) == 2);
75 ASSERT (ftello (stdin) == 2);
77 /* Test ftell after random ungetc. */
80 ch = ungetc ('@', stdin);
82 ASSERT (ftell (stdin) == 2);
83 ASSERT (ftello (stdin) == 2);
87 ASSERT (ftell (stdin) == 3);
88 ASSERT (ftello (stdin) == 3);
90 /* Test ftell after ungetc without read. */
91 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
92 ASSERT (ftell (stdin) == 3);
93 ASSERT (ftello (stdin) == 3);
95 ch = ungetc ('~', stdin);
97 ASSERT (ftell (stdin) == 2);
98 ASSERT (ftello (stdin) == 2);
100 /* Test ftell beyond end of file. */
101 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
103 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
104 ASSERT (ftell (stdin) == ch + 10);
105 ASSERT (ftello (stdin) == ch + 10);