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glibc  2.9
srand48_r.c
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00001 /* Copyright (C) 1995, 1996, 1997, 1998, 2001 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <stdlib.h>
00021 #include <limits.h>
00022 
00023 int
00024 __srand48_r (seedval, buffer)
00025      long int seedval;
00026      struct drand48_data *buffer;
00027 {
00028   /* The standards say we only have 32 bits.  */
00029   if (sizeof (long int) > 4)
00030     seedval &= 0xffffffffl;
00031 
00032   buffer->__x[2] = seedval >> 16;
00033   buffer->__x[1] = seedval & 0xffffl;
00034   buffer->__x[0] = 0x330e;
00035 
00036   buffer->__a = 0x5deece66dull;
00037   buffer->__c = 0xb;
00038   buffer->__init = 1;
00039 
00040   return 0;
00041 }
00042 weak_alias (__srand48_r, srand48_r)