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 /* None of the files accessed by this test are large, so disable the
27 fseek link warning if we are not using the gnulib fseek module. */
32 #define ASSERT(expr) \
37 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
44 #ifndef FUNC_UNGETC_BROKEN
45 # define FUNC_UNGETC_BROKEN 0
49 main (int argc, char **argv _GL_UNUSED)
52 /* Assume stdin is seekable iff argc > 1. */
55 ASSERT (ftell (stdin) == -1);
56 ASSERT (ftello (stdin) == -1);
60 /* mingw ftell is unreliable on text mode input. */
63 /* Simple tests. For each test, make sure ftell and ftello agree. */
64 ASSERT (ftell (stdin) == 0);
65 ASSERT (ftello (stdin) == 0);
69 ASSERT (ftell (stdin) == 1);
70 ASSERT (ftello (stdin) == 1);
72 /* Test ftell after ungetc of read input. */
73 ch = ungetc ('#', stdin);
75 ASSERT (ftell (stdin) == 0);
76 ASSERT (ftello (stdin) == 0);
80 ASSERT (ftell (stdin) == 1);
81 ASSERT (ftello (stdin) == 1);
83 /* Test ftell after fseek. */
84 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
85 ASSERT (ftell (stdin) == 2);
86 ASSERT (ftello (stdin) == 2);
88 /* Test ftell after random ungetc. */
91 ch = ungetc ('@', stdin);
93 ASSERT (ftell (stdin) == 2);
94 ASSERT (ftello (stdin) == 2);
98 ASSERT (ftell (stdin) == 3);
99 ASSERT (ftello (stdin) == 3);
103 if (FUNC_UNGETC_BROKEN)
105 fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
109 /* Test ftell after ungetc without read. */
110 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
111 ASSERT (ftell (stdin) == 3);
112 ASSERT (ftello (stdin) == 3);
114 ch = ungetc ('~', stdin);
116 ASSERT (ftell (stdin) == 2);
117 ASSERT (ftello (stdin) == 2);
120 #if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
121 /* Test ftell beyond end of file. */
122 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
124 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
125 ASSERT (ftell (stdin) == ch + 10);
126 ASSERT (ftello (stdin) == ch + 10);