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author | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
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committer | Lorry Tar Creator <lorry-tar-importer@lorry> | 2016-01-20 10:55:18 +0000 |
commit | 70e9163c9c18e995515598085cb824e554eb7ae7 (patch) | |
tree | a42dc8b2a6c031354bf31472de888bfc8a060132 /gnulib-tests/test-fseeko.c | |
parent | cbf5993c43f49281173f185863577d86bfac6eae (diff) | |
download | coreutils-tarball-master.tar.gz |
coreutils-8.25HEADcoreutils-8.25master
Diffstat (limited to 'gnulib-tests/test-fseeko.c')
-rw-r--r-- | gnulib-tests/test-fseeko.c | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/gnulib-tests/test-fseeko.c b/gnulib-tests/test-fseeko.c new file mode 100644 index 0000000..dee2072 --- /dev/null +++ b/gnulib-tests/test-fseeko.c @@ -0,0 +1,74 @@ +/* Test of fseeko() function. + Copyright (C) 2007-2016 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2007. */ + +#include <config.h> + +/* None of the files accessed by this test are large, so disable the + fseek link warning if we are not using the gnulib fseek module. */ +#define _GL_NO_LARGE_FILES +#include <stdio.h> + +#include "signature.h" +SIGNATURE_CHECK (fseeko, int, (FILE *, off_t, int)); + + +#include "macros.h" + +#ifndef FUNC_UNGETC_BROKEN +# define FUNC_UNGETC_BROKEN 0 +#endif + +int +main (int argc, char **argv _GL_UNUSED) +{ + /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh' + iff argc > 1. */ + int expected = argc > 1 ? 0 : -1; + /* Exit with success only if fseek/fseeko agree. */ + int r1 = fseeko (stdin, 0, SEEK_CUR); + int r2 = fseek (stdin, 0, SEEK_CUR); + ASSERT (r1 == r2 && r1 == expected); + if (argc > 1) + { + /* Test that fseek discards previously read ungetc data. */ + int ch = fgetc (stdin); + ASSERT (ch == '#'); + ASSERT (ungetc (ch, stdin) == ch); + ASSERT (fseeko (stdin, 2, SEEK_SET) == 0); + ch = fgetc (stdin); + ASSERT (ch == '/'); + if (2 < argc) + { + if (FUNC_UNGETC_BROKEN) + { + fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n", + stderr); + return 77; + } + /* Test that fseek discards random ungetc data. */ + ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff)); + } + ASSERT (fseeko (stdin, 0, SEEK_END) == 0); + ASSERT (fgetc (stdin) == EOF); + /* Test that fseek resets end-of-file marker. */ + ASSERT (feof (stdin)); + ASSERT (fseeko (stdin, 0, SEEK_END) == 0); + ASSERT (!feof (stdin)); + } + return 0; +} |