initial import of NetBSD tree

1 files changed, 146 insertions, 0 deletions

diff --git a/games/rogue/random.c b/games/rogue/random.c
new file mode 100644
index 00000000000..6e2abc6025a
--- /dev/null
+++ b/games/rogue/random.c
@@ -0,0 +1,146 @@
+/*	$NetBSD: random.c,v 1.3 1995/04/22 10:28:06 cgd Exp $	*/
+
+/*
+ * Copyright (c) 1988, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Timothy C. Stoehr.
+ *
+ * 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 University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
+ */
+
+#ifndef lint
+#if 0
+static char sccsid[] = "@(#)random.c	8.1 (Berkeley) 5/31/93";
+#else
+static char rcsid[] = "$NetBSD: random.c,v 1.3 1995/04/22 10:28:06 cgd Exp $";
+#endif
+#endif /* not lint */
+
+/*
+ * random.c
+ *
+ * This source herein may be modified and/or distributed by anybody who
+ * so desires, with the following restrictions:
+ *    1.)  No portion of this notice shall be removed.
+ *    2.)  Credit shall not be taken for the creation of this source.
+ *    3.)  This code is not to be traded, sold, or used for personal
+ *         gain or profit.
+ *
+ */
+
+static long rntb[32] = {
+	         3, 0x9a319039, 0x32d9c024, 0x9b663182, 0x5da1f342, 
+	0xde3b81e0, 0xdf0a6fb5, 0xf103bc02, 0x48f340fb, 0x7449e56b,
+	0xbeb1dbb0, 0xab5c5918, 0x946554fd, 0x8c2e680f, 0xeb3d799f,
+	0xb11ee0b7, 0x2d436b86, 0xda672e2a, 0x1588ca88, 0xe369735d,
+	0x904f35f7, 0xd7158fd6, 0x6fa6f051, 0x616e6b96, 0xac94efdc, 
+	0x36413f93, 0xc622c298, 0xf5a42ab8, 0x8a88d77b, 0xf5ad9d0e,
+	0x8999220b, 0x27fb47b9
+};
+
+static long *fptr = &rntb[4];
+static long *rptr = &rntb[1];
+static long *state = &rntb[1];
+static int rand_type = 3;
+static int rand_deg = 31;
+static int rand_sep = 3;
+static long *end_ptr = &rntb[32];
+
+srrandom(x)
+int x;
+{
+	register int i;
+	long rrandom();
+
+	state[0] = (long) x;
+	if (rand_type != 0) {
+		for (i = 1; i < rand_deg; i++) {
+			state[i] = 1103515245 * state[i - 1] + 12345;
+		}
+		fptr = &state[rand_sep];
+		rptr = &state[0];
+		for (i = 0; i < 10 * rand_deg; i++) {
+			(void) rrandom();
+		}
+	}
+}
+
+long
+rrandom()
+{
+	long i;
+	
+	if (rand_type == 0) {
+		i = state[0] = (state[0]*1103515245 + 12345) & 0x7fffffff;
+	} else {
+		*fptr += *rptr;
+		i = (*fptr >> 1) & 0x7fffffff;
+		if (++fptr >= end_ptr) {
+			fptr = state;
+			++rptr;
+		} else {
+			if (++rptr >= end_ptr) {
+				rptr = state;
+			}
+		}
+	}
+	return(i);
+}
+
+get_rand(x, y)
+register int x, y;
+{
+	register int r, t;
+	long lr;
+
+	if (x > y) {
+		t = y;
+		y = x;
+		x = t;
+	}
+	lr = rrandom();
+	lr &= (long) 0x00003fff;
+	r = (int) lr;
+	r = (r % ((y - x) + 1)) + x;
+	return(r);
+}
+
+rand_percent(percentage)
+register int percentage;
+{
+	return(get_rand(1, 100) <= percentage);
+}
+
+coin_toss()
+{
+
+	return(((rrandom() & 01) ? 1 : 0));
+}