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

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• Hash : 26af642c
  Author :
  Date : 2008-10-22T11:19:27
  

  random_r: new module
  
  * modules/random_r: New file.
  * m4/random_r.m4: New file.
  * lib/random_r.c: New file, from glibc.
  * modules/random_r-tests: New file.
  * tests/test-random_r.c: New file.
  * lib/stdlib.in.h (srandom_r, initstate_r, setstate_r, random_r): Declare.
  (RAND_MAX): Define.
  * m4/stdlib_h.m4: Define and AC_SUBST GNULIB_RANDOM_R and HAVE_RANDOM_R.
  * modules/stdlib: Substitute them, too.
  * MODULES.html.sh (Extra functions based on POSIX:2001) [Misc]: Add it.
  * doc/glibc-functions/initstate_r.texi: Mention the new module.
  * doc/glibc-functions/random_r.texi: Likewise.
  * doc/glibc-functions/setstate_r.texi: Likewise.
  * doc/glibc-functions/srandom_r.texi: Likewise.
  * config/srclist.txt: Mention it.
  

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• tests/test-random_r.c

• /* Test random_r.
     Copyright (C) 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/>.  */
  
  #include <config.h>
  #include <stdlib.h>
  #include <stdio.h>
  #include <time.h>
  
  #define ASSERT(expr) \
    do									     \
      {									     \
        if (!(expr))							     \
          {								     \
            fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
            fflush (stderr);						     \
            abort ();							     \
          }								     \
      }									     \
    while (0)
  
  int
  main ()
  {
    struct random_data rand_state;
    char buf[128];
    unsigned int i;
    unsigned int n_big = 0;
  
    rand_state.state = NULL;
    if (initstate_r (time (NULL), buf, sizeof buf, &rand_state))
      return 1;
    for (i = 0; i < 1000; i++)
      {
        int32_t r;
        ASSERT (random_r (&rand_state, &r) == 0);
        ASSERT (0 <= r);
        if (RAND_MAX / 2 < r)
  	++n_big;
      }
  
    /* Fail if none of the numbers were larger than RAND_MAX / 2.  */
    return !n_big;
  }
  

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