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Member "gnuastro-0.8/bootstrapped/tests/test-strnlen.c" (28 Dec 2018, 1778 Bytes) of package /linux/privat/gnuastro-0.8.tar.lz:


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    1 /*
    2  * Copyright (C) 2010-2018 Free Software Foundation, Inc.
    3  * Written by Eric Blake
    4  *
    5  * This program is free software: you can redistribute it and/or modify
    6  * it under the terms of the GNU General Public License as published by
    7  * the Free Software Foundation; either version 3 of the License, or
    8  * (at your option) any later version.
    9  *
   10  * This program is distributed in the hope that it will be useful,
   11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   13  * GNU General Public License for more details.
   14  *
   15  * You should have received a copy of the GNU General Public License
   16  * along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
   17 
   18 #include <config.h>
   19 
   20 #include <string.h>
   21 
   22 #include "signature.h"
   23 SIGNATURE_CHECK (strnlen, size_t, (char const *, size_t));
   24 
   25 #include <stdlib.h>
   26 
   27 #include "zerosize-ptr.h"
   28 #include "macros.h"
   29 
   30 int
   31 main (void)
   32 {
   33   size_t i;
   34   char *page_boundary = (char *) zerosize_ptr ();
   35   if (!page_boundary)
   36     {
   37       page_boundary = malloc (0x1000);
   38       ASSERT (page_boundary);
   39       page_boundary += 0x1000;
   40     }
   41 
   42   /* Basic behavior tests.  */
   43   ASSERT (strnlen ("a", 0) == 0);
   44   ASSERT (strnlen ("a", 1) == 1);
   45   ASSERT (strnlen ("a", 2) == 1);
   46   ASSERT (strnlen ("", 0x100000) == 0);
   47 
   48   /* Memory fence and alignment testing.  */
   49   for (i = 0; i < 512; i++)
   50     {
   51       char *start = page_boundary - i;
   52       size_t j = i;
   53       memset (start, 'x', i);
   54       do
   55         {
   56           if (i != j)
   57             {
   58               start[j] = 0;
   59               ASSERT (strnlen (start, i + j) == j);
   60             }
   61           ASSERT (strnlen (start, i) == j);
   62           ASSERT (strnlen (start, j) == j);
   63         }
   64       while (j--);
   65     }
   66 
   67   return 0;
   68 }