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. */
23 #include "signature.h"
24 SIGNATURE_CHECK (ftello, off_t, (FILE *));
28 #include "binary-io.h"
30 /* None of the files accessed by this test are large, so disable the
31 fseek link warning if we are not using the gnulib fseek module. */
36 #define ASSERT(expr) \
41 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
48 #ifndef FUNC_UNGETC_BROKEN
49 # define FUNC_UNGETC_BROKEN 0
53 main (int argc, char **argv _GL_UNUSED)
56 /* Assume stdin is seekable iff argc > 1. */
59 ASSERT (ftell (stdin) == -1);
60 ASSERT (ftello (stdin) == -1);
64 /* mingw ftell is unreliable on text mode input. */
67 /* Simple tests. For each test, make sure ftell and ftello agree. */
68 ASSERT (ftell (stdin) == 0);
69 ASSERT (ftello (stdin) == 0);
73 ASSERT (ftell (stdin) == 1);
74 ASSERT (ftello (stdin) == 1);
76 /* Test ftell after ungetc of read input. */
77 ch = ungetc ('#', stdin);
79 ASSERT (ftell (stdin) == 0);
80 ASSERT (ftello (stdin) == 0);
84 ASSERT (ftell (stdin) == 1);
85 ASSERT (ftello (stdin) == 1);
87 /* Test ftell after fseek. */
88 ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
89 ASSERT (ftell (stdin) == 2);
90 ASSERT (ftello (stdin) == 2);
92 /* Test ftell after random ungetc. */
95 ch = ungetc ('@', stdin);
97 ASSERT (ftell (stdin) == 2);
98 ASSERT (ftello (stdin) == 2);
102 ASSERT (ftell (stdin) == 3);
103 ASSERT (ftello (stdin) == 3);
107 if (FUNC_UNGETC_BROKEN)
109 fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n",
113 /* Test ftell after ungetc without read. */
114 ASSERT (fseek (stdin, 0, SEEK_CUR) == 0);
115 ASSERT (ftell (stdin) == 3);
116 ASSERT (ftello (stdin) == 3);
118 ch = ungetc ('~', stdin);
120 ASSERT (ftell (stdin) == 2);
121 ASSERT (ftello (stdin) == 2);
124 #if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
125 /* Test ftell beyond end of file. */
126 ASSERT (fseek (stdin, 0, SEEK_END) == 0);
128 ASSERT (fseek (stdin, 10, SEEK_END) == 0);
129 ASSERT (ftell (stdin) == ch + 10);
130 ASSERT (ftello (stdin) == ch + 10);