/* Test of fwriting() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2013 Free Software Foundation, Inc.
- This program is free software; you can redistribute it and/or modify
+ 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 2, or (at your option)
- any later version.
+ 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
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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ 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 "fwriting.h"
-#include <stdlib.h>
+#include <stdio.h>
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "macros.h"
#define TESTFILE "t-fwriting.tmp"
fwriting is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
after fflush. */
+ /* First a scenario with only fgetc, fseek, fputc. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
if (fseek (fp, 0, SEEK_CUR) != 0)
goto skip;
ASSERT (!fwriting (fp));
- if (fputc ('z', fp) != 'z')
+ if (fputc ('x', fp) != 'x')
goto skip;
ASSERT (fwriting (fp));
if (fseek (fp, 0, SEEK_END))
goto skip;
- /* fwriting (fp) is undefined here, but freading (fp) is false. */
+ /* freading (fp) is undefined here, because on some implementations (e.g.
+ glibc) fseek causes a buffer to be read.
+ fwriting (fp) is undefined as well. */
if (fclose (fp))
goto skip;
fwriting is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
after fflush. */
+ /* Here a scenario that includes fflush. */
fp = fopen (TESTFILE, "r+");
if (fp == NULL)
goto skip;
ASSERT (!fwriting (fp));
fflush (fp);
ASSERT (!fwriting (fp));
- if (fgetc (fp) != 'a')
+ if (fgetc (fp) != 'x')
goto skip;
ASSERT (!fwriting (fp));
/* This fseek call is necessary when switching from reading to writing.
ASSERT (fwriting (fp));
if (fseek (fp, 0, SEEK_END))
goto skip;
- /* fwriting (fp) is undefined here, but freading (fp) is false. */
+ /* freading (fp) is undefined here, because on some implementations (e.g.
+ glibc) fseek causes a buffer to be read.
+ fwriting (fp) is undefined as well. */
if (fclose (fp))
goto skip;