1/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */ 2 3/* 4 Part of the Wiring project - http://wiring.org.co 5 Copyright (c) 2004-06 Hernando Barragan 6 Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/ 7 8 This library is free software; you can redistribute it and/or 9 modify it under the terms of the GNU Lesser General Public 10 License as published by the Free Software Foundation; either 11 version 2.1 of the License, or (at your option) any later version. 12 13 This library is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 Lesser General Public License for more details. 17 18 You should have received a copy of the GNU Lesser General 19 Public License along with this library; if not, write to the 20 Free Software Foundation, Inc., 59 Temple Place, Suite 330, 21 Boston, MA 02111-1307 USA 22 23 $Id$ 24*/ 25 26extern "C" { 27 #include "stdlib.h" 28} 29 30void randomSeed(unsigned int seed) 31{ 32 if (seed != 0) { 33 srandom(seed); 34 } 35} 36 37long random(long howbig) 38{ 39 if (howbig == 0) { 40 return 0; 41 } 42 return random() % howbig; 43} 44 45long random(long howsmall, long howbig) 46{ 47 if (howsmall >= howbig) { 48 return howsmall; 49 } 50 long diff = howbig - howsmall; 51 return random(diff) + howsmall; 52} 53 54long map(long x, long in_min, long in_max, long out_min, long out_max) 55{ 56 return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; 57} 58 59unsigned int makeWord(unsigned int w) { return w; } 60unsigned int makeWord(unsigned char h, unsigned char l) { return (h << 8) | l; }