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glibc  2.9
tst-random2.c
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00001 /* Test initstate saving the old state.
00002    Copyright (C) 2005 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004    Contributed by Jakub Jelinek <jakub@redhat.com>, 2005.
00005 
00006    The GNU C Library is free software; you can redistribute it and/or
00007    modify it under the terms of the GNU Lesser General Public
00008    License as published by the Free Software Foundation; either
00009    version 2.1 of the License, or (at your option) any later version.
00010 
00011    The GNU C Library is distributed in the hope that it will be useful,
00012    but WITHOUT ANY WARRANTY; without even the implied warranty of
00013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014    Lesser General Public License for more details.
00015 
00016    You should have received a copy of the GNU Lesser General Public
00017    License along with the GNU C Library; if not, write to the Free
00018    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00019    02111-1307 USA.  */
00020 
00021 #include <stdio.h>
00022 #include <stdlib.h>
00023 
00024 int
00025 main (void)
00026 {
00027   int pass;
00028   int ret = 0;
00029   long int r[2];
00030 
00031   for (pass = 0; pass < 2; pass++)
00032     {
00033       srandom (0x12344321);
00034 
00035       int j;
00036       for (j = 0; j < 3; ++j)
00037        random ();
00038       if (pass == 1)
00039        {
00040          char state[128];
00041          char *ostate = initstate (0x34562101, state, 128);
00042          if (setstate (ostate) != state)
00043            {
00044              puts ("setstate (ostate) != state");
00045              ret = 1;
00046            }
00047        }
00048 
00049       random ();
00050       r[pass] = random ();
00051     }
00052 
00053   if (r[0] != r[1])
00054     {
00055       printf ("%ld != %ld\n", r[0], r[1]);
00056       ret = 1;
00057     }
00058   return ret;
00059 }