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glibc  2.9
seed48_r.c
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00001 /* Copyright (C) 1995, 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 <string.h>
00022 #include <limits.h>
00023 
00024 int
00025 __seed48_r (seed16v, buffer)
00026      unsigned short int seed16v[3];
00027      struct drand48_data *buffer;
00028 {
00029   /* Save old value at a private place to be used as return value.  */
00030   memcpy (buffer->__old_x, buffer->__x, sizeof (buffer->__x));
00031 
00032   /* Install new state.  */
00033   buffer->__x[2] = seed16v[2];
00034   buffer->__x[1] = seed16v[1];
00035   buffer->__x[0] = seed16v[0];
00036   buffer->__a = 0x5deece66dull;
00037   buffer->__c = 0xb;
00038   buffer->__init = 1;
00039 
00040   return 0;
00041 }
00042 weak_alias (__seed48_r, seed48_r)