aboutsummaryrefslogtreecommitdiff
path: root/targets/arduino/WRandom.cpp
diff options
context:
space:
mode:
authorDavid A. Mellis <d.mellis@arduino.cc>2007-10-06 14:09:02 +0000
committerDavid A. Mellis <d.mellis@arduino.cc>2007-10-06 14:09:02 +0000
commit72e9f39fbde96b484338cbbd785680e5ab4a2e72 (patch)
treebd441d569bf70c9697ccfbee7c70fa26d67be3a0 /targets/arduino/WRandom.cpp
parentb86a6e051920a4ffdb92bc5b8de7260ff3978117 (diff)
Renaming core to targets.
Diffstat (limited to 'targets/arduino/WRandom.cpp')
-rw-r--r--targets/arduino/WRandom.cpp54
1 files changed, 54 insertions, 0 deletions
diff --git a/targets/arduino/WRandom.cpp b/targets/arduino/WRandom.cpp
new file mode 100644
index 0000000..c45c306
--- /dev/null
+++ b/targets/arduino/WRandom.cpp
@@ -0,0 +1,54 @@
+/* -*- mode: jde; c-basic-offset: 2; indent-tabs-mode: nil -*- */
+
+/*
+ Part of the Wiring project - http://wiring.org.co
+ Copyright (c) 2004-06 Hernando Barragan
+ Modified 13 August 2006, David A. Mellis for Arduino - http://www.arduino.cc/
+
+ 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
+
+ $Id$
+*/
+
+extern "C" {
+ #include "stdlib.h"
+}
+
+void randomSeed(unsigned int seed)
+{
+ if(seed != 0){
+ srand(seed);
+ }
+}
+
+long random(long howbig)
+{
+ long value;
+ 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;
+}
+