44 lines
1.2 KiB
C++
44 lines
1.2 KiB
C++
/*
|
|
Copyright (c) 2014 Arduino. All right reserved.
|
|
|
|
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
|
|
void randomSeed(uint32_t dwSeed) {
|
|
if (dwSeed != 0) {
|
|
srand(dwSeed) ;
|
|
}
|
|
}
|
|
|
|
long random(long howbig) {
|
|
if (howbig == 0) {
|
|
return 0 ;
|
|
}
|
|
|
|
return rand() % howbig;
|
|
}
|
|
|
|
long random(long howsmall, long howbig) {
|
|
if (howsmall >= howbig) {
|
|
return howsmall;
|
|
}
|
|
|
|
long diff = howbig - howsmall;
|
|
|
|
return random(diff) + howsmall;
|
|
}
|