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+/* $Header: /cvsroot/src/games/dab/Attic/random.C,v 1.1.1.1 2003/12/26 17:57:03 christos Exp $ */
+
+/*-
+ * Copyright (c) 2003 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Christos Zoulas.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the NetBSD
+ * Foundation, Inc. and its contributors.
+ * 4. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * random.C: Randomizer for the dots program
+ */
+
+#include "defs.h"
+RCSID("$Id: random.C,v 1.1.1.1 2003/12/26 17:57:03 christos Exp $")
+
+#include <time.h>
+#include <string.h>
+#include "random.h"
+
+RANDOM::RANDOM(size_t ns) :
+ _bs(ns)
+{
+ _bm = new char[(_bs >> 3) + 1];
+ clear();
+}
+
+RANDOM::~RANDOM()
+{
+ delete[] _bm;
+}
+
+// Reinitialize
+void RANDOM::clear(void)
+{
+ _nv = 0;
+ ::srand48(::time(NULL));
+ (void) ::memset(_bm, 0, (_bs >> 3) + 1);
+}
+
+// Return the next random value
+size_t RANDOM::operator() (void)
+{
+ // No more values
+ if (_nv == _bs)
+ return _bs;
+
+ for (;;) {
+ size_t r = ::lrand48();
+ size_t z = r % _bs;
+ if (!isset(z)) {
+ set(z);
+ _nv++;
+ return z;
+ }
+ }
+}