/usr/share/sdcc/lib/src/rand.c is in sdcc-libraries 2.9.0-5.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | /*-------------------------------------------------------------------------
rand.c - random number generator
Written By - Maarten Brock, sourceforge.brock@dse.nl (2006)
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding!
-------------------------------------------------------------------------*/
#include <stdlib.h>
static unsigned long int next = 1;
int rand(void)
{
next = next * 1103515245UL + 12345;
return (unsigned int)(next/65536) % (RAND_MAX + 1U);
}
void srand(unsigned int seed)
{
next = seed;
}
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