--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/genericopenlibs/cstdlib/LSTDLIB/RAND.CPP	Tue Feb 02 02:01:42 2010 +0200
@@ -0,0 +1,118 @@
+// Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// FUNCTION
+// <<rand>>, <<srand>>---pseudo-random numbers
+// INDEX
+// rand
+// INDEX
+// srand
+// INDEX
+// _rand_r
+// INDEX
+// _srand_r
+// ANSI_SYNOPSIS
+//
+
+// #include <stdlib.h>
+// int rand(void);
+// void srand(unsigned int <[seed]>);
+// int _rand_r(void *<[reent]>);
+// void _srand_r(void *<[reent]>, unsigned int <[seed]>);
+// TRAD_SYNOPSIS
+// #include <stdlib.h>
+// int rand();
+// void srand(<[seed]>)
+// unsigned int <[seed]>;
+// int _rand_r(<[reent]>);
+// char *<[reent]>
+// void _srand_r(<[data]>,<[seed]>)
+// char *<[reent]>;
+// unsigned int <[seed]>;
+// <<rand>> returns a different integer each time it is called; each
+// integer is chosen by an algorithm designed to be unpredictable, so
+// that you can use <<rand>> when you require a random number.
+// The algorithm depends on a static variable called the ``random seed'';
+// starting with a given value of the random seed always produces the
+// same sequence of numbers in successive calls to <<rand>>.
+// You can set the random seed using <<srand>>; it does nothing beyond
+// storing its argument in the static variable used by <<rand>>.  You can
+// exploit this to make the pseudo-random sequence less predictable, if
+// you wish, by using some other unpredictable value (often the least
+// significant parts of a time-varying value) as the random seed before
+// beginning a sequence of calls to <<rand>>; or, if you wish to ensure
+// (for example, while debugging) that successive runs of your program
+// use the same ``random'' numbers, you can use <<srand>> to set the same
+// random seed at the outset.
+// <<_rand_r>> and <<_srand_r>> are reentrant versions of <<rand>> and
+// <<srand>>.  The extra argument <[reent]> is a pointer to a reentrancy
+// structure.
+// RETURNS
+// <<rand>> returns the next pseudo-random integer in sequence; it is a
+// number between <<0>> and <<RAND_MAX>> (inclusive).
+// <<srand>> does not return a result.
+// PORTABILITY
+// <<rand>> is required by ANSI, but the algorithm for pseudo-random
+// number generation is not specified; therefore, even if you use
+// the same random seed, you cannot expect the same sequence of results
+// on two different systems.
+// <<rand>> requires no supporting OS subroutines.
+//
+
+#include <e32math.h>
+#include <stdlib_r.h>
+
+extern "C" {
+
+/**
+Reentrant versions of rand()
+@param ptr
+*/
+EXPORT_C int _rand_r(struct _reent *ptr)
+	{
+	return Math::Rand(*(TInt64*)ptr->_next);
+	}
+
+/**
+Reentrant versions of srand()
+@param ptr
+@param seed
+*/
+EXPORT_C void _srand_r (struct _reent *ptr, unsigned int seed)
+	{
+	ptr->_next[0] = seed;
+	ptr->_next[1] = seed;
+	}
+
+/**
+Returns a different integer each time it is called; each
+integer is chosen by an algorithm designed to be unpredictable, so
+that you can use <<rand>> when you require a random number.
+@return the next pseudo-random integer in sequence; it is a
+number between 0 and RAND_MAX (inclusive).
+*/
+EXPORT_C int rand (void)
+	{
+	return _rand_r (_REENT);
+	}
+
+/**
+Sets the random seed.
+@param seed seed
+*/
+EXPORT_C void srand (unsigned int seed)
+	{
+	_srand_r (_REENT, seed);
+	}
+
+} // extern "C"