| 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 |
|
| 24 | extern "C" { |
| 25 | #include "stdlib.h" |
| 26 | } |
| 27 |
|
| 28 | void randomSeed(unsigned long seed) |
| 29 | { |
| 30 | if (seed != 0) { |
| 31 | srandom(seed); |
| 32 | } |
| 33 | } |
| 34 |
|
| 35 | long random(long howbig) |
| 36 | { |
| 37 | if (howbig == 0) { |
| 38 | return 0; |
| 39 | } |
| 40 | return random() % howbig; |
| 41 | } |
| 42 |
|
| 43 | long random(long howsmall, long howbig) |
| 44 | { |
| 45 | if (howsmall >= howbig) { |
| 46 | return howsmall; |
| 47 | } |
| 48 | long diff = howbig - howsmall; |
| 49 | return random(diff) + howsmall; |
| 50 | } |
| 51 |
|
| 52 | long map(long x, long in_min, long in_max, long out_min, long out_max) |
| 53 | { |
| 54 | return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min; |
| 55 | } |
| 56 |
|
| 57 | unsigned int makeWord(unsigned int w) { return w; } |
| 58 | unsigned int makeWord(unsigned char h, unsigned char l) { return (h << 8) | l; } |
| 59 |
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