initial import of NetBSD tree

1 files changed, 46 insertions, 0 deletions

diff --git a/src/lib/libc/stdlib/_rand48.c b/src/lib/libc/stdlib/_rand48.c
new file mode 100644
index 0000000000..83ade4645a
--- /dev/null
+++ b/src/lib/libc/stdlib/_rand48.c
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 1993 Martin Birgmeier
+ * All rights reserved.
+ *
+ * You may redistribute unmodified or modified versions of this source
+ * code provided that the above copyright notice and this and the
+ * following conditions are retained.
+ *
+ * This software is provided ``as is'', and comes with no warranties
+ * of any kind. I shall in no event be liable for anything that happens
+ * to anyone/anything when using this software.
+ */
+
+#include "rand48.h"
+
+unsigned short __rand48_seed[3] = {
+        RAND48_SEED_0,
+        RAND48_SEED_1,
+        RAND48_SEED_2
+};
+unsigned short __rand48_mult[3] = {
+        RAND48_MULT_0,
+        RAND48_MULT_1,
+        RAND48_MULT_2
+};
+unsigned short __rand48_add = RAND48_ADD;
+
+void
+__dorand48(unsigned short xseed[3])
+{
+        unsigned long accu;
+        unsigned short temp[2];
+
+        accu = (unsigned long) __rand48_mult[0] * (unsigned long) xseed[0] +
+         (unsigned long) __rand48_add;
+        temp[0] = (unsigned short) accu;        /* lower 16 bits */
+        accu >>= sizeof(unsigned short) * 8;
+        accu += (unsigned long) __rand48_mult[0] * (unsigned long) xseed[1] +
+         (unsigned long) __rand48_mult[1] * (unsigned long) xseed[0];
+        temp[1] = (unsigned short) accu;        /* middle 16 bits */
+        accu >>= sizeof(unsigned short) * 8;
+        accu += __rand48_mult[0] * xseed[2] + __rand48_mult[1] * xseed[1] + __rand48_mult[2] * xseed[0];
+        xseed[0] = temp[0];
+        xseed[1] = temp[1];
+        xseed[2] = (unsigned short) accu;
+}