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

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• Hash : e220635f
  Author :
  Date : 2008-04-11T16:31:39
  

  Flush the standard error stream before aborting.
  

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• tests/test-fseek.c

• /* Test of fseek() function.
     Copyright (C) 2007, 2008 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>
  
  #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)
  
  int
  main (int argc, char **argv)
  {
    /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh'
       iff argc > 1.  */
    int expected = argc > 1 ? 0 : -1;
    ASSERT (fseek (stdin, 0, SEEK_CUR) == expected);
    if (argc > 1)
      {
        /* Test that fseek discards previously read ungetc data.  */
        int ch = fgetc (stdin);
        ASSERT (ch == '#');
        ASSERT (ungetc (ch, stdin) == ch);
        ASSERT (fseek (stdin, 2, SEEK_SET) == 0);
        /* Test that fseek discards random ungetc data.  */
        ch = fgetc (stdin);
        ASSERT (ch == '/');
        ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff));
        ASSERT (fseek (stdin, 0, SEEK_END) == 0);
        ASSERT (fgetc (stdin) == EOF);
        /* Test that fseek resets end-of-file marker.  */
        ASSERT (feof (stdin));
        ASSERT (fseek (stdin, 0, SEEK_END) == 0);
        ASSERT (!feof (stdin));
      }
    return 0;
  }
  

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