rand() implementation.

[bertos.git] / mware / rand.c

diff --git a/mware/rand.c b/mware/rand.c
new file mode 100755 (executable)
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--- /dev/null
+++ b/mware/rand.c
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+/**
+ * \file
+ * <!--
+ * Copyright 2006 Develer S.r.l. (http://www.develer.com/)
+ * Copyright 1999 Bernardo Innocenti <bernie@develer.com>
+ * This file is part of DevLib - See README.devlib for information.
+ * -->
+ *
+ * \brief Very simple rand() algorithm.
+ *
+ * \version $Id$
+ * \author Bernardo Innocenti <bernie@develer.com>
+ */
+
+/* This would really belong to libc */
+static int rand(void)
+{
+       static unsigned long seed;
+
+       /* Randomize seed */
+       seed = (seed ^ 0x4BAD5A39UL) + 6513973UL;
+
+       return (int)(seed>>16);
+}