1 /* Test of ftello() 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. */
24 #include "binary-io.h"
26 #define ASSERT(expr) \
31 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
38 #ifndef FUNC_UNGETC_BROKEN
39 # define FUNC_UNGETC_BROKEN 0
43 main (int argc, char **argv)
46 /* Assume stdin is seekable iff argc > 1. */
49 ASSERT (ftell (stdin) == -1);
50 ASSERT (ftello (stdin) == -1);
54 /* mingw ftell is unreliable on text mode input. */
57 /* Simple tests. For each test, make sure ftell and ftello agree. */
58 ASSERT (ftell (stdin) == 0);
59 ASSERT (ftello (stdin) == 0);
63 ASSERT (ftell (stdin) == 1);
64 ASSERT (ftello (stdin) == 1);
66 /* Test ftell after ungetc of read input. */
67 ch = ungetc ('#', stdin);
69 ASSERT (ftell (stdin) == 0);
70 ASSERT (ftello (stdin) == 0);
74 ASSERT (ftell (stdin) == 1);
75 ASSERT (ftello (stdin) == 1);
77 /* Test ftell after fseek. */
78 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
79 ASSERT (ftell (stdin) == 2);
80 ASSERT (ftello (stdin) == 2);
82 /* Test ftell after random ungetc. */
85 ch = ungetc ('@', stdin);
87 ASSERT (ftell (stdin) == 2);
88 ASSERT (ftello (stdin) == 2);
92 ASSERT (ftell (stdin) == 3);
93 ASSERT (ftello (stdin) == 3);
97 if (FUNC_UNGETC_BROKEN)
99 fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
103 /* Test ftell after ungetc without read. */
104 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
105 ASSERT (ftell (stdin) == 3);
106 ASSERT (ftello (stdin) == 3);
108 ch = ungetc ('~', stdin);
110 ASSERT (ftell (stdin) == 2);
111 ASSERT (ftello (stdin) == 2);
114 /* Test ftell beyond end of file. */
115 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
117 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
118 ASSERT (ftell (stdin) == ch + 10);
119 ASSERT (ftello (stdin) == ch + 10);