OpenSolaris Launch

1 files changed, 41 insertions, 0 deletions

diff --git a/usr/src/lib/libresolv2/common/dnssafe/intbits.c b/usr/src/lib/libresolv2/common/dnssafe/intbits.c
new file mode 100644
index 0000000000..6a213d30ee
--- /dev/null
+++ b/usr/src/lib/libresolv2/common/dnssafe/intbits.c
@@ -0,0 +1,41 @@
+/*
+ * Copyright 1999-2002 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/* Copyright (C) RSA Data Security, Inc. created 1990, 1996.  This is an
+   unpublished work protected as such under copyright law.  This work
+   contains proprietary, confidential, and trade secret information of
+   RSA Data Security, Inc.  Use, disclosure or reproduction without the
+   express written authorization of RSA Data Security, Inc. is
+   prohibited.
+ */
+
+#include "port_before.h"
+#include "global.h"
+#include "algae.h"
+#include "port_after.h"
+
+/* Return the number of bits in the canonical, positive integer.
+   IntgerBits (0) = 0.
+ */
+unsigned int A_IntegerBits (integer, integerLen)
+const unsigned char *integer;
+unsigned int integerLen;
+{
+  unsigned char mask, byte;
+  unsigned int bytes, bits;
+  
+  for (bytes = 0; bytes < integerLen && integer[bytes] == 0; bytes++);
+  if (bytes == integerLen)
+    return (0);
+  
+  /* Get byte to test and increment byte count for final calculation */
+  byte = integer[bytes++];
+  
+  /* Get number of bits in most significant byte */
+  for (bits = 8, mask = 0x80; (byte & mask) == 0; bits--, mask >>= 1);
+  return (8 * (integerLen - bytes) + bits);
+}