libf2c/libU77/irand_.c

   1 /* Copyright (C) 1995 Free Software Foundation, Inc.
   2 This file is part of GNU Fortran libU77 library.
   3
   4 This library is free software; you can redistribute it and/or modify it
   5 under the terms of the GNU Library General Public License as published
   6 by the Free Software Foundation; either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 GNU Fortran is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with GNU Fortran; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 Boston, MA 02111-1307, USA.  */
  18
  19 #ifdef HAVE_CONFIG_H
  20 #include "config.h"
  21 #endif
  22 #if HAVE_STDLIB_H
  23 #  include <stdlib.h>
  24 #endif
  25 #include "f2c.h"
  26
  27 /* We could presumably do much better than the traditional libc
  28    version, though at least the glibc one is reasonable, it seems.
  29    For the sake of the innocent, I'm not sure we should really do
  30    this... */
  31
  32 /* Note this is per SunOS -- other s may have no arg. */
  33
  34 #ifdef KR_headers
  35 integer G77_irand_0 (flag)
  36   integer *flag;
  37 #else
  38 integer G77_irand_0 (integer *flag)
  39 #endif
  40 {
  41   switch (*flag) {
  42   case 0:
  43     break;
  44   case 1:
  45     srand (0);                  /* Arbitrary choice of initialiser. */
  46     break;
  47   default:
  48     srand (*flag);
  49   }
  50   return rand ();
  51 }
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