1 /* Test of ftell() 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__); \
39 main (int argc, char **argv)
42 /* Assume stdin is seekable iff argc > 1. */
45 ASSERT (ftell (stdin) == -1);
49 /* mingw ftell is unreliable on text mode input. */
53 ASSERT (ftell (stdin) == 0);
57 ASSERT (ftell (stdin) == 1);
59 /* Test ftell after ungetc of read input. */
60 ch = ungetc ('#', stdin);
62 ASSERT (ftell (stdin) == 0);
66 ASSERT (ftell (stdin) == 1);
68 /* Test ftell after fseek. */
69 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
70 ASSERT (ftell (stdin) == 2);
72 /* Test ftell after random ungetc. */
75 ch = ungetc ('@', stdin);
77 ASSERT (ftell (stdin) == 2);
81 ASSERT (ftell (stdin) == 3);
83 #if !defined __hpux /* HP-UX 11 has a known bug here */
84 /* Test ftell after ungetc without read. */
85 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
86 ASSERT (ftell (stdin) == 3);
89 ch = ungetc ('~', stdin);
91 ASSERT (ftell (stdin) == 2);
93 /* Test ftell beyond end of file. */
94 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
96 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
97 ASSERT (ftell (stdin) == ch + 10);