/* Test of freading() function.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007-2014 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 "freading.h"
-#include <stdlib.h>
+#include <stdio.h>
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "macros.h"
#define TESTFILE "t-freading.tmp"
int
-main ()
+main (void)
{
FILE *fp;
/* Create a file with some contents. Write-only file is never reading. */
fp = fopen (TESTFILE, "w");
- if (fp == NULL)
- goto skip;
+ ASSERT (fp);
ASSERT (!freading (fp));
- if (fwrite ("foobarsh", 1, 8, fp) < 8)
- goto skip;
+ ASSERT (fwrite ("foobarsh", 1, 8, fp) == 8);
ASSERT (!freading (fp));
- if (fclose (fp))
- goto skip;
+ ASSERT (fclose (fp) == 0);
/* Open it in read-only mode. Read-only file is always reading. */
fp = fopen (TESTFILE, "r");
- if (fp == NULL)
- goto skip;
+ ASSERT (fp);
ASSERT (freading (fp));
- if (fgetc (fp) != 'f')
- goto skip;
+ ASSERT (fgetc (fp) == 'f');
ASSERT (freading (fp));
- if (fseek (fp, 2, SEEK_CUR))
- goto skip;
+ ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
ASSERT (freading (fp));
- if (fgetc (fp) != 'b')
- goto skip;
+ ASSERT (fgetc (fp) == 'b');
ASSERT (freading (fp));
- if (fseek (fp, 0, SEEK_END))
- goto skip;
+ fflush (fp);
ASSERT (freading (fp));
- if (fclose (fp))
- goto skip;
+ ASSERT (fgetc (fp) == 'a');
+ ASSERT (freading (fp));
+ ASSERT (fseek (fp, 0, SEEK_END) == 0);
+ ASSERT (freading (fp));
+ ASSERT (fclose (fp) == 0);
/* Open it in read-write mode. POSIX requires a reposition (fseek,
fsetpos, rewind) or EOF when transitioning from read to write;
freading is only deterministic after input or output, but this
test case should be portable even on open, after reposition, and
at EOF. */
+ /* First a scenario with only fgetc, fseek, fputc. */
fp = fopen (TESTFILE, "r+");
- if (fp == NULL)
- goto skip;
+ ASSERT (fp);
ASSERT (!freading (fp));
- if (fgetc (fp) != 'f')
- goto skip;
+ ASSERT (fgetc (fp) == 'f');
ASSERT (freading (fp));
- if (fseek (fp, 2, SEEK_CUR))
- goto skip;
- /* freading (fp)) is undefined here, but fwriting is false. */
- if (fgetc (fp) != 'b')
- goto skip;
+ ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
+ /* freading (fp) is undefined here, but fwriting (fp) is false. */
+ ASSERT (fgetc (fp) == 'b');
ASSERT (freading (fp));
- if (fseek (fp, 0, SEEK_CUR) != 0)
- goto skip;
- if (fputc ('z', fp) != 'z')
- goto skip;
+ /* This fseek call is necessary when switching from reading to writing.
+ See the description of fopen(), ISO C 99 7.19.5.3.(6). */
+ ASSERT (fseek (fp, 0, SEEK_CUR) == 0);
+ /* freading (fp) is undefined here, but fwriting (fp) is false. */
+ ASSERT (fputc ('x', fp) == 'x');
ASSERT (!freading (fp));
- if (fseek (fp, 0, SEEK_END))
- goto skip;
+ ASSERT (fseek (fp, 0, SEEK_END) == 0);
+ /* 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. */
+ ASSERT (fclose (fp) == 0);
+
+ /* Open it in read-write mode. POSIX requires a reposition (fseek,
+ fsetpos, rewind) or EOF when transitioning from read to write;
+ freading is only deterministic after input or output, but this
+ test case should be portable even on open, after reposition, and
+ at EOF. */
+ /* Here a scenario that includes fflush. */
+ fp = fopen (TESTFILE, "r+");
+ ASSERT (fp);
ASSERT (!freading (fp));
- if (fclose (fp))
- goto skip;
+ ASSERT (fgetc (fp) == 'f');
+ ASSERT (freading (fp));
+ ASSERT (fseek (fp, 2, SEEK_CUR) == 0);
+ /* freading (fp) is undefined here, but fwriting (fp) is false. */
+ ASSERT (fgetc (fp) == 'b');
+ ASSERT (freading (fp));
+ fflush (fp);
+ /* freading (fp) is undefined here, but fwriting (fp) is false. */
+ ASSERT (fgetc (fp) == 'x');
+ ASSERT (freading (fp));
+ /* This fseek call is necessary when switching from reading to writing.
+ See the description of fopen(), ISO C 99 7.19.5.3.(6). */
+ ASSERT (fseek (fp, 0, SEEK_CUR) == 0);
+ /* freading (fp) is undefined here, but fwriting (fp) is false. */
+ ASSERT (fputc ('z', fp) == 'z');
+ ASSERT (!freading (fp));
+ ASSERT (fseek (fp, 0, SEEK_END) == 0);
+ /* 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. */
+ ASSERT (fclose (fp) == 0);
/* Open it in append mode. Write-only file is never reading. */
fp = fopen (TESTFILE, "a");
- if (fp == NULL)
- goto skip;
+ ASSERT (fp);
ASSERT (!freading (fp));
- if (fwrite ("bla", 1, 3, fp) < 3)
- goto skip;
+ ASSERT (fwrite ("bla", 1, 3, fp) == 3);
ASSERT (!freading (fp));
- if (fclose (fp))
- goto skip;
-
+ ASSERT (fclose (fp) == 0);
+ ASSERT (remove (TESTFILE) == 0);
return 0;
-
- skip:
- fprintf (stderr, "Skipping test: file operations failed.\n");
- return 77;
}
projects / gnulib.git / blobdiff