test-fseeko.c

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Author : Eric Blake
Date : 2009-12-22 15:14:49
Hash : 169ab5de
Message : gnulib-common: prefer _GL_UNUSED over _UNUSED_PARAMETER_ There are more contexts where __attribute__((__unused__)) is useful than just parameter lists. Also, naming the macro _GL_UNUSED fits with the recent addition of _GL_ARG_NONNULL. Preserve the name _UNUSED_PARAMETER_ for backwards-compatible use in external projects. * m4/gnulib-common.m4 (gl_COMMON): Create a more-appropriately named alias for __attribute__((__unused__)). * lib/chown.c: Update client. * lib/fchmodat.c: Likewise. * lib/fts.c: Likewise. * lib/getdate.y: Likewise. * lib/getgroups.c: Likewise. * lib/getopt.c: Likewise. * lib/getugroups.c: Likewise. * lib/mkdir.c: Likewise. * lib/mkfifo.c: Likewise. * lib/mkfifoat.c: Likewise. * lib/mknod.c: Likewise. * lib/mknodat.c: Likewise. * lib/readlink.c: Likewise. * lib/se-context.in.h: Likewise. * lib/se-selinux.in.h: Likewise. * lib/sockets.c: Likewise. * lib/symlink.c: Likewise. * lib/symlinkat.c: Likewise. * lib/unicodeio.c: Likewise. * lib/unistr.h: Likewise. * tests/test-areadlink.c: Likewise. * tests/test-areadlinkat.c: Likewise. * tests/test-filenamecat.c: Likewise. * tests/test-fseeko.c: Likewise. * tests/test-ftello.c: Likewise. * tests/test-getdate.c: Likewise. * tests/test-getgroups.c: Likewise. * tests/test-gethostname.c: Likewise. * tests/test-quotearg.c: Likewise. * tests/test-version-etc.c: Likewise. * tests/test-xalloc-die.c: Likewise. * tests/test-xfprintf-posix.c: Likewise. * tests/test-xprintf-posix.c: Likewise. * tests/test-xvasprintf.c: Likewise. Signed-off-by: Eric Blake <ebb9@byu.net>

tests/test-fseeko.c

/* Test of fseeko() function.
   Copyright (C) 2007, 2008, 2009 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.  */
#if !GNULIB_FSEEK
# undef GL_LINK_WARNING
# define GL_LINK_WARNING(ignored) ((void) 0)
#endif

#include <stdio.h>
#include <stdlib.h>

#define ASSERT(expr) \
  do                                                                         \
    {                                                                        \
      if (!(expr))                                                           \
        {                                                                    \
          fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
          fflush (stderr);                                                   \
          abort ();                                                          \
        }                                                                    \
    }                                                                        \
  while (0)

#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;
}

kc3-lang/gnulib/tests/test-fseeko.c

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kc3-lang/gnulib /tests/test-fseeko.c